lcd screen side panel factory

Important technical improvements of LCD, such as LED backlighting and wide viewing Angle, are directly related to LCD. And account for an LCD display 80% of the cost of the LCD panel, enough to show that the LCD panel is the core part of the entire display, the quality of the LCD panel, can be said to directly determine the quality of an LCD display.

The production of civil LCD displays is just an assembly process. The LCD panel, the main control circuit, shell, and other parts of the main assembly, basically will not have too complex technical problems.

Does this mean that LCDS are low-tech products? In fact, it is not. The production and manufacturing process of the LCD panels is very complicated, requiring at least 300 process processes. The whole process needs to be carried out in a dust-free environment and with precise technology.

The general structure of the LCD panel is not very complex, now the structure of the LCD panel is divided into two parts: the LCD panel and the backlight system.

Due to the LCD does not shine, so you need to use another light source to illuminate, the function of the backlight system is to this, but currently used CCFL lamp or LED backlight, don’t have the characteristics of the surface light source, so you need to guide plate, spreadsheet components, such as linear or point sources of light evenly across the surface, in order to make the entire LCD panel on the differences of luminous intensity is the same, but it is very difficult, to achieve the ideal state can be to try to reduce brightness non-uniformity, the backlight system has a lot to the test of design and workmanship.

In addition, there is a driving IC and printed circuit board beside the LCD panel, which is mainly used to control the rotation of LCD molecules in the LCD panel and the transmission of display signals. The LCD plate is thin and translucent without electricity. It is roughly shaped like a sandwich, with an LCD sandwiched between a layer of TFT glass and a layer of colored filters.

LCD with light refraction properties of solid crystals, with fluid flow characteristics at the same time, under the drive of the electrode, can be arranged in a way that, in accordance with the master want to control the strength of the light through, and then on the color filter, through the red, green, blue three colors of each pixel toning, eventually get the full-screen image.

According to the functional division, the LCD panel can be divided into the LCD panel and the backlight system. However, to produce an LCD panel, it needs to go through three complicated processes, namely, the manufacturing process of the front segment Array,the manufacturing process of the middle segment Cell, and the assembly of the rear segment module. Today we will be here, for you in detail to introduce the production of the LCD panel manufacturing process.

The manufacturing process of the LCD panel Array is mainly composed of four parts: film, yellow light, etch and peel film. If we just look at it in this way, many netizens do not understand the specific meaning of these four steps and why they do so.

First of all, the motion and arrangement of LCD molecules need electrons to drive them. Therefore, on the TFT glass, the carrier of LCD, there must be conductive parts to control the motion of LCD. In this case, we use ITO (Indium Tin Oxide) to do this.ITO is transparent and also acts as a thin-film conductive crystal so that it doesn’t block the backlight.

The different arrangement of LCD molecules and the rapid motion change can ensure that each pixel displays the corresponding color accurately and the image changes accurately and quickly, which requires the precision of LCD molecule control.ITO film needs special treatment, just like printing the circuit on the PCB board, drawing the conductive circuit on the whole LCD board.

This completes the previous Array process. It is not difficult to see from the whole process that ITO film is deposited, photoresist coated, exposed, developed, and etched on TFT glass, and finally, ITO electrode pattern designed in the early stage is formed on TFT glass to control the movement of LCD molecules on the glass. The general steps of the whole production process are not complicated, but the technical details and precautions are very complicated, so we will not introduce them here. Interested friends can consult relevant materials by themselves.

The glass that the LCD board uses makes a craft also very exquisite. (The manufacturing process flow of the LCD display screen)At present, the world’s largest LCD panel glass, mainly by the United States Corning, Japan Asahi glass manufacturers, located in the upstream of the production of LCD panel, these manufacturers have mastered the glass production technology patents. A few months ago, the earthquake caused a corning glass furnace shutdown incident, which has caused a certain impact on the LCD panel industry, you can see its position in the industry.

As mentioned earlier, the LCD panel is structured like a sandwich, with an LCD sandwiched between the lower TFT glass and the upper color filter. The terminal Cell process in LCD panel manufacturing involves the TFT glass being glued to the top and bottom of a colored filter, but this is not a simple bonding process that requires a lot of technical detail.

As you can see from the figure above, the glass is divided into 6 pieces of the same size. In other words, the LCD made from this glass is finally cut into 6 pieces, and the size of each piece is the final size. When the glass is cast, the specifications and sizes of each glass have been designed in advance.

Directional friction:Flannelette material is used to rub the surface of the layer in a specific direction so that the LCD molecules can be arranged along the friction direction of the aligned layer in the future to ensure the consistency of the arrangement of LCD molecules. After the alignment friction, there will be some contaminants such as flannelette thread, which need to be washed away through a special cleaning process.

After the TFT glass substrate is cleaned, a sealant coating is applied to allow the TFT glass substrate to be bonded to the color filter and to prevent LCD outflow.

Finally, the conductive adhesive is applied to the frame in the bonding direction of the glass of the color filter to ensure that external electrons can flow into the LCD layer. Then, according to the bonding mark on the TFT glass substrate and the color filter, two pieces of glass are bonded together, and the bonding material is solidified at high temperatures to make the upper and lower glasses fit statically.

Color filters are very important components of LCD panels. Manufacturers of color filters, like glass substrate manufacturers, are upstream of LCD panel manufacturers. Their oversupply or undersupply can directly affect the production schedule of LCD panels and indirectly affect the end market.

As can be seen from the above figure, each LCD panel is left with two edges after cutting. What is it used for? You can find the answer in the later module process

Finally, a polarizer is placed on both sides of each LCD substrate, with the horizontal polarizer facing outwards and the vertical polarizer facing inwards.

When making LCD panel, must up and down each use one, and presents the alternating direction, when has the electric field and does not have the electric field, causes the light to produce the phase difference and to present the light and dark state, uses in the display subtitle or the pattern.

The rear Module manufacturing process is mainly the integration of the drive IC pressing of the LCD substrate and the printed circuit board. This part can transmit the display signal received from the main control circuit to the drive IC to drive the LCD molecules to rotate and display the image. In addition, the backlight part will be integrated with the LCD substrate at this stage, and the complete LCD panel is completed.

Firstly, the heteroconductive adhesive is pressed on the two edges, which allows external electrons to enter the LCD substrate layer and acts as a bridge for electronic transmission

Next is the drive IC press. The main function of the drive IC is to output the required voltage to each pixel and control the degree of torsion of the LCD molecules. The drive IC is divided into two types. The source drive IC located in the X-axis is responsible for the input of data. It is characterized by high frequency and has an image function. The gate drive IC located in the Y-axis is responsible for the degree and speed of torsion of LCD molecules, which directly affects the response time of the LCD display. However, there are already many LCD panels that only have driving IC in the X-axis direction, perhaps because the Y-axis drive IC function has been integrated and simplified.

The press of the flexible circuit board can transmit data signals and act as the bridge between the external printed circuit and LCD. It can be bent and thus becomes a flexible or flexible circuit board

The manufacturing process of the LCD substrate still has a lot of details and matters needing attention, for example, rinse with clean, dry, dry, dry, ultrasonic cleaning, exposure, development and so on and so on, all have very strict technical details and requirements, so as to produce qualified eyes panel, interested friends can consult relevant technical information by a search engine.

LCD (LC) is a kind of LCD, which has the properties of light transmission and refraction of solid Crystal, as well as the flow property of Liquid. It is because of this property that it will be applied to the display field.

However, LCD does not emit light autonomously, so the display equipment using LCD as the display medium needs to be equipped with another backlight system.

First, a backplate is needed as the carrier of the light source. The common light source for LCD display equipment is CCFL cold cathode backlight, but it has started to switch to an LED backlight, but either one needs a backplate as the carrier.

CCFL backlight has been with LCD for a long time. Compared with LED backlight, CCFL backlight has many defects. However, it has gradually evolved to save 50% of the lamp and enhance the transmittance of the LCD panel, so as to achieve the purpose of energy-saving.

With the rapid development of LED in the field of lighting, the cost has been greatly reduced.LCD panels have also started to use LED as the backlight on a large scale. Currently, in order to control costs, an LED backlight is placed on the side rather than on the backplate, which can reduce the number of LED grains.

On the transparent diffuser plate, point-like printing can block part of the light. The LED backlight on the side drives the light from the side of the diffuser plate, and the light reflects and refracts back and forth in the diffuser plate, distributing the light evenly to the whole surface. Point-like printing blocks part of the light, screening the light evenly like a sieve.

At the top of the diffusion plate, there will be 3~4 diffuser pieces, constantly uniform light to the whole surface, improve the uniformity of light, which is directly related to the LCD panel display effect. Professional LCD in order to better control the brightness uniformity of the screen, panel procurement, the later backlight control circuit, will make great efforts to ensure the quality of the panel.

However, it is much simpler to use a side white LED as a backlight. The small circuit board on the far left of the figure above is the backlight of the LED.

Since the LCD substrate and the backlight system are not fixed by bonding, a metal or rubber frame is needed to be added to the outer layer to fix the LCD substrate and the backlight system.

After the period of the Module, the process is completed in LCM (LCDModule) factory, the core of this part of the basic does not involve the use of LCD manufacturing technology, mainly is some assembly work, so some machine panel factories such as chi mei, Korea department such as Samsung panel factory, all set with LCM factories in mainland China, Duan Mo group after the LCD panel assembly, so that we can convenient mainland area each big monitor procurement contract with LCD TV manufacturers, can reduce the human in the whole manufacturing and transportation costs.

However, neither Taiwan nor Korea has any intention to set up factories in mainland China for the LCD panel front and middle manufacturing process involving core technologies. Therefore, there is still a long way to go for China to have its own LCD panel industry.

In recent time, China domestic companies like BOE have overtaken LCD manufacturers from Korea and Japan. For the first three quarters of 2020, China LCD companies shipped 97.01 million square meters TFT LCD. And China"s LCD display manufacturers expect to grab 70% global LCD panel shipments very soon.

BOE started LCD manufacturing in 1994, and has grown into the largest LCD manufacturers in the world. Who has the 1st generation 10.5 TFT LCD production line. BOE"s LCD products are widely used in areas like TV, monitor, mobile phone, laptop computer etc.

TianMa Microelectronics is a professional LCD and LCM manufacturer. The company owns generation 4.5 TFT LCD production lines, mainly focuses on making medium to small size LCD product. TianMa works on consult, design and manufacturing of LCD display. Its LCDs are used in medical, instrument, telecommunication and auto industries.

TCL CSOT (TCL China Star Optoelectronics Technology Co., Ltd), established in November, 2009. TCL has six LCD panel production lines commissioned, providing panels and modules for TV and mobile products. The products range from large, small & medium display panel and touch modules.

Established in 1996, Topway is a high-tech enterprise specializing in the design and manufacturing of industrial LCD module. Topway"s TFT LCD displays are known worldwide for their flexible use, reliable quality and reliable support. More than 20 years expertise coupled with longevity of LCD modules make Topway a trustworthy partner for decades. CMRC (market research institution belonged to Statistics China before) named Topway one of the top 10 LCD manufactures in China.

Founded in 2006, K&D Technology makes TFT-LCM, touch screen, finger print recognition and backlight. Its products are used in smart phone, tablet computer, laptop computer and so on.

The Company engages in the R&D, manufacturing, and sale of LCD panels. It offers LCD panels for notebook computers, desktop computer monitors, LCD TV sets, vehicle-mounted IPC, consumer electronics products, mobile devices, tablet PCs, desktop PCs, and industrial displays.

In Topway, we work side by side to help you overcome any technical and none technical challenges that may arise during product design, manufacture or installation. We can even take care of component sourcing and manufacturing for you.

Once the steel panel is punched, the iBUYPOWER team sets forth on embedding the 5:4 LCD in the new-formed hole. The LCD is purchased as sort of an all-in-one solution, then parts are extracted as needed. Wiring for the panel feeds into an expansion slot box, which is another existing display splitter solution that"s been encased in a plastic shell made by iBUYPOWER.

Videos are played back from the host machine, though the panel can technically also act as a monitor (e.g. extended display or cloned, which we show in the video). Contrast isn"t ideal for normal monitor use since you"re still seeing the system internals, but it does work. Things look a bit better in person than on camera; our cameras seem to have some trouble seeing through the light guide.

LCD Spec: 19” transparent TN LCD side panel display with 1280 x 1024 resolution enabling the complete customization of the side panel. Users can configure the digital display to feature video wallpaper, images, or system temperatures in real-time

We have thousands of standard products that are in stock and available from our Seattle, WA and Hong Kong warehouses to support fast product development and preproduction without MOQ. The stock covers TN, STN LCD display panels, COB, COG character LCD display, graphic LCD display, PMOLED, AMOLED display, TFT display, IPS display, high brightness and transflective, blanview sunlight readable display, super high contrast ratio display, lightning fast response displays, efficient low power consumption display, extreme temperature range display, HMI display, HDMI display, Raspberry Pi Display, Arduino display, embedded display, capacitive touch screen, LED backlight etc.  Customers can easily purchase samples directly from our website to avoid time delays with setting up accounts and credit terms and shipping within 24 hours.

Many of our customers require customized OEM display solutions.  With over two decades of experience, we apply our understanding of available display solutions to meet our customer’s requirements and assist from project concept to mass production. Using your ideas and requirements as a foundation, we work side by side with you to develop ideas/concepts into drawings, build prototypes and to final production seamlessly. In order to meet the fast changing world, we can provide the fastest turnaround in the industry, it takes only 3-4 weeks to produce LCD panels samples and 4-6 weeks for LCD display module, TFT LCD, IPS LCD display, and touch screen samples. The production time is only 4-5 weeks for LCD panels and 5-8 weeks for LCD display module, TFT LCD, IPS LCD display, and touch screen.

LCD Transparent Displays, transparent screens, transparent monitors, see through screens, transparent touch screen technology, and kits from CDS as we have our own range of transparent screens / displays and transparent video screens manufactured for us, and as we control the manufacturing, we can not only offer more sizes than anyone else in the world, but also guarantee stable supply, long term availability LCDs with amazing quality.  We have replaced the Samsung Transparent Displays / see through Displays and LG Transparent OLEDs that are no longer available!

CDS has increased the use of these see through screens / see through displays / see through computer screens / clear monitors across the world including touchscreen computer screens combined with the transparent LCD touch screens and Transparent OLED displays.

Performance issues may occur if there is any type of damage that is caused to the display cables or the LCD screen. LCD screen may show that symptoms like LCD screen stops working, work intermittently, color mismatch, flickering, display horizontal or vertical lines if there is damage to the display cables or the LCD screen.

Dell monitors provide a self-test feature check (SFTC) and an integrated self-test (BIST) or integrated diagnostic (BID) tool that helps determine if the screen abnormality you are experiencing is an inherent problem with the Dell monitor or with the video card (GPU) and computer settings.

When you notice screen abnormalities like flickering, distortion, clarity issues, fuzzy or blurry image, horizontal or vertical lines, color fade, it is a good practice to isolate the monitor by running a diagnostic test on the Dell monitor.

NOTE: Self-test feature check (SFTC) helps check if the Dell monitor is working normally as a stand-alone device. To check for screen abnormalities such as flickering, distortion, clarity issues, fuzzy or blurry image, horizontal or vertical lines, color fade, and so on, run the integrated self-test (BIST) or integrated diagnostic (BID) test.

Dell monitors can be reset to factory default settings using the on-screen display (OSD) menu. This can be accessed using the buttons or joystick that is available on the Dell monitor. For step-by-step instructions to reset a Dell monitor to factory default settings, see the User Guide of your Dell monitor at the Dell Manuals website.

Flat-panel displays are thin panels of glass or plastic used for electronically displaying text, images, or video. Liquid crystal displays (LCD), OLED (organic light emitting diode) and microLED displays are not quite the same; since LCD uses a liquid crystal that reacts to an electric current blocking light or allowing it to pass through the panel, whereas OLED/microLED displays consist of electroluminescent organic/inorganic materials that generate light when a current is passed through the material. LCD, OLED and microLED displays are driven using LTPS, IGZO, LTPO, and A-Si TFT transistor technologies as their backplane using ITO to supply current to the transistors and in turn to the liquid crystal or electroluminescent material. Segment and passive OLED and LCD displays do not use a backplane but use indium tin oxide (ITO), a transparent conductive material, to pass current to the electroluminescent material or liquid crystal. In LCDs, there is an even layer of liquid crystal throughout the panel whereas an OLED display has the electroluminescent material only where it is meant to light up. OLEDs, LCDs and microLEDs can be made flexible and transparent, but LCDs require a backlight because they cannot emit light on their own like OLEDs and microLEDs.

Liquid-crystal display (or LCD) is a thin, flat panel used for electronically displaying information such as text, images, and moving pictures. They are usually made of glass but they can also be made out of plastic. Some manufacturers make transparent LCD panels and special sequential color segment LCDs that have higher than usual refresh rates and an RGB backlight. The backlight is synchronized with the display so that the colors will show up as needed. The list of LCD manufacturers:

Organic light emitting diode (or OLED displays) is a thin, flat panel made of glass or plastic used for electronically displaying information such as text, images, and moving pictures. OLED panels can also take the shape of a light panel, where red, green and blue light emitting materials are stacked to create a white light panel. OLED displays can also be made transparent and/or flexible and these transparent panels are available on the market and are widely used in smartphones with under-display optical fingerprint sensors. LCD and OLED displays are available in different shapes, the most prominent of which is a circular display, which is used in smartwatches. The list of OLED display manufacturers:

MicroLED displays is an emerging flat-panel display technology consisting of arrays of microscopic LEDs forming the individual pixel elements. Like OLED, microLED offers infinite contrast ratio, but unlike OLED, microLED is immune to screen burn-in, and consumes less power while having higher light output, as it uses LEDs instead of organic electroluminescent materials, The list of MicroLED display manufacturers:

LCDs are made in a glass substrate. For OLED, the substrate can also be plastic. The size of the substrates are specified in generations, with each generation using a larger substrate. For example, a 4th generation substrate is larger in size than a 3rd generation substrate. A larger substrate allows for more panels to be cut from a single substrate, or for larger panels to be made, akin to increasing wafer sizes in the semiconductor industry.

"Samsung Display has halted local Gen-8 LCD lines: sources". THE ELEC, Korea Electronics Industry Media. August 16, 2019. Archived from the original on April 3, 2020. Retrieved December 18, 2019.

"TCL to Build World"s Largest Gen 11 LCD Panel Factory". www.businesswire.com. May 19, 2016. Archived from the original on April 2, 2018. Retrieved April 1, 2018.

"Panel Manufacturers Start to Operate Their New 8th Generation LCD Lines". 대한민국 IT포털의 중심! 이티뉴스. June 19, 2017. Archived from the original on June 30, 2019. Retrieved June 30, 2019.

"TCL"s Panel Manufacturer CSOT Commences Production of High Generation Panel Modules". www.businesswire.com. June 14, 2018. Archived from the original on June 30, 2019. Retrieved June 30, 2019.

"Samsung Display Considering Halting Some LCD Production Lines". 비즈니스코리아 - BusinessKorea. August 16, 2019. Archived from the original on April 5, 2020. Retrieved December 19, 2019.

Herald, The Korea (July 6, 2016). "Samsung Display accelerates transition from LCD to OLED". www.koreaherald.com. Archived from the original on April 1, 2018. Retrieved April 1, 2018.

"China"s BOE to have world"s largest TFT-LCD+AMOLED capacity in 2019". ihsmarkit.com. 2017-03-22. Archived from the original on 2019-08-16. Retrieved 2019-08-17.

[1] The present invention relates to a cutting method of a large size TFT-LCD panel and a liquid crystal display unit to enhance a simplicity of process facility and a speediness through solving a problem of an increase of facilities due to manufacturing TFT-LCD panels of respective sizes and reducing a subsequently increased cost by enabling a mass production of a various size of TFT-LCD panels in one manufacturing line through using a TFT-LCD panel cut in a desired size that is manufactured in large size. Background Art

[2] Generally, it is well known that various flat panel display units replacing a cathode ray tube (CRT) which has been used so far are developed and being distributed as many interests are concentrated on a display unit of larger size and better quality as a medium for screen image information.

[3] It is also well known that a liquid crystal display unit, one of these flat panel display units, has developed in a level equal or better than CRT in screen color tone quality aspect.

[5] Most of all as an outline, one pixel (composed of R. G. B. three sub-pixels) in the thin film transistor (TFT) - LCD is approximately as fine as 0.3 mm wide.

[6] Of course, the TFT included in the pixel is smaller than the pixel. Moreover, in order to meet a resolution of 1600x1200, 1,920,000 pixels are required and 5,760,000 TFTs are necessary if the sub-pixels are considered. Therefore, an overall process is very precise and demands a level of semiconductor process.

TFT process, a color filter (CF) process, a cell process and a module process. The cell process makes one panel with two glasses undergone the TFT process and the CF process. Then, the module process completes the manufacturing process by mounting the one TFT-LCD panel undergone the cell process in a real monitor or TV.

process in the processes of manufacturing the TFT-LCD panel is necessary in the TFT process but also a similar pattern process is necessary in the CF process.

TFT-LCD panel formed as hereinabove, the TFT-LCD panel is completed by providing a polarized plate on a surface of the TFT substrate and the CF substrate.

[11] The TFT-LCD panel of size demanded by a user may be produced in a large amount but the other TFT-LCD panel of less demand may be produced in only a limited amount since various sizes of the TFT-LCD panels completed as hereinabove require a difference in production line and in each process of the production line dependent on the sizes of the TFT-LCD panels. Disclosure of Invention Technical Problem

[13] The cutting method of a large size TFT-LCD panel of the present invention, provided to solve the hereinabove problems, has an object of enhancing a simplicity of process facility and speediness through solving a problem of an increase of facilities due to manufacturing TFT-LCD panels of different sizes and reducing a subsequently increased cost by enabling a mass production of a various size of TFT-LCD panels in one manufacturing line through using a TFT-LCD panel cut in a desired size that is manufactured in large size.

[14] The cutting method of a large size TFT-LCD panel formed as hereinabove can devise a simplicity in process and a profitability through solving a spatial enlargement and other costs increase due to an increase of facilities by equipping a facility"s process dependent on a size according to a production of TFT-LCD panels in various sizes, having an advantage of possibly producing a various size of the TFT-LCD panel asked by a user purpose or a user taste in a simple and convenient way, and solving an abandonment and reduction of the facilities due to a change in consumption dependent

[18] FIG. 4 illustrates a state of a scribe line set into a mid-depth of a color filter substrate and a thin film transistor substrate by diamond wheel in the cutting method of a large size TFT-LCD panel of the present invention.

[20] FIG. 6 illustrates a state completed after processing sealing a cut portion in the cutting method of a large size TFT-LCD panel of the present invention.

[27] In a completed large size TFT-LCD panel formed in a sequentially coupled configuration of a polarized plate, a color filter (CF) substrate, a liquid crystal layer, a thin film transistor (TFT) substrate and a polarized plate below the TFT substrate, a polarized plate stripping step that removes a portion of a predetermined width to be cut from the each polarized plate provided on a surface and an opposite surface of the large size TFT-LCD panel, a cutting location setting step that sets a portion not damaging a gate line and a data line of the TFT substrate through investigating a portion stripped in the polarized plate stripping step by microscope, a scribe line setting step that sets a first scribe line cutting the CF substrate into its mid-depth along the portion set in the cutting location setting step using a diamond wheel, a turning

over step that turns over the large size TFT-LCD panel to a side opposite from a side where a portion of the first scribe line is set after chucking one end of the large size TFT-LCD panel, a scribe line setting step that sets a second scribe line cutting the TFT substrate into its mid-depth in the stripped polarized plate portion along the portion set in the cutting location setting step which precisely corresponds with the set first scribe line using a diamond wheel after turning over the large size TFT-LCD panel, a tempering step that tempers for 30 minutes to form a natural crack in the scribe lines formed on the CF substrate and the TFT substrate of the large size TFT-LCD panel, a cutting step that cuts the CF substrate and the TFT substrate naturally cracked after the 30 minutes tempering step, and a sealing process step that sealing a cut portion formed in the cutting step, and

[28] In a completed large size TFT-LCD panel formed in a sequentially coupled configuration of a polarized plate, a color filter (CF) substrate, a liquid crystal layer, a thin film transistor (TFT) substrate and a polarized plate, a cutting location setting step that sets a portion to be cut, a scribe line setting step that sets a first scribe line cutting the CF substrate into its mid-depth along the portion set in the cutting location setting step using a diamond wheel, a turning over step that turns over the large size TFT-LCD panel to a side opposite from a side where a portion of the first scribe line is set after chucking one end of the large size TFT-LCD panel, a scribe line setting step that sets a second scribe line cutting the TFT substrate into its mid-depth along the portion set in the cutting line setting step which precisely corresponds with the set first scribe line, using a diamond wheel after turning over the large size TFT-LCD panel, a tempering step that tempers for 30 minutes to form a natural crack in the scribe lines formed on the CF substrate and the TFT substrate of the large size TFT-LCD panel, a cutting step that cuts the CF substrate and the TFT substrate naturally cracked after the 30 minutes tempering step, and a sealing process step that sealing a cut portion formed in the cutting step may accomplish the present invention object.

[30] The cutting method of a large size TFT-LCD panel further comprises a blocking off a light illuminated from a backlight through attaching a light blocking tape along a cut portion selected between the CF substrate and the TFT substrate or the both substrates or between the polarized plates located above the CF substrate and below the TFT substrate or the both polarized plates.

LCD panel 100 is formed in structure sequentially coupled of, a polarized plate 10, a color filter (CF) substrate 11, a liquid crystal layer 12, a thin film transistor (TFT) substrate 13 and a polarized plate 14.

[36] In order to cut the large size TFT-LCD panel 100 completed as hereinabove, a polarized plate stripping step is initially performed that removes a portion of a predetermined width to be cut from the each polarized plate 10 provided on a surface above the CF substrate 11 and an opposite surface below the TFT substrate 13.

[38] The TFT substrate 13 is exposed if the polarized plates 10 and 14 around the cutting portion are removed by its lengthwise direction. Since gate lines transferring a scanning signal and data line transferring a screen image signal are configured by innumerably crossing with each other and difficult to perceive by naked eyes, a cutting location setting step sets a portion not damaging the gate line and the data line of the TFT substrate through investigating a portion stripped on the polarized plate stripping step by microscope.

[43] To process a side opposite from a side where a portion of the first scribe line is set, the present step turns over the large size TFT-LCD panel 100 after chucking one end of the large size TFT-LCD panel 100.

precisely corresponds with the set first scribe line, using a diamond wheel after turning over the large size TFT-LCD panel 100. This step is also difficult and requires a skill of high precision to correspond with the set first scribe line.

[48] A natural crack is made if tempered for 30 minutes to form a natural crack in the scribe lines formed on the CF substrate 11 and the TFT substrate 13 of the large size TFT-LCD panel 100. Then, the air flows into a liquid crystal layer 12. If there is the air flow into the liquid crystal layer 12, the liquid crystal layer 12 is temporarily restricted from flowing out by the flowed in air.

[50] After the 30 minutes tempering step, the CF substrate 11 and the TFT substrate 13 are naturally cracked along the first scribe line and the second scribe line and the present step externally applies a certain amount of force in order to cut the large size TFT-LCD panel 100 along the scribe lines.

[52] The present step is the last step that applies a sealant 30 on a cut portion in the large size TFT-LCD panel 100 and the present invention is completed by applying the sealant 30.

[53] Through undergoing the process hereinabove, the large size TFT-LCD panel 100 is possible to be cut into a plural or multiple numbers without a many numbers of equipment and to meet a desired size of a demander or an operator.

[56] That is, in a large size TFT-LCD panel 100 completed of forming sequentially coupled, a polarized plate 10, a color filter (CF) substrate 11, a liquid crystal layer 12, a thin film transistor (TFT) substrate 13 and a polarized plate 14 below the TFT substrate 13, a cutting location setting step that sets a portion to be cut, a scribe line setting step that sets a first scribe line cutting the CF substrate 11 into its mid-depth along the portion set in the cutting location setting step using a diamond wheel, a turning over step that turns over the large size TFT-LCD panel 100 to a side opposite from a side where a portion of the first scribe line is set after chucking one end of the large size TFT-LCD panel 100, a scribe line setting step that sets a second scribe line cutting the TFT substrate 13 into its mid-depth along the portion set in the cutting location setting step corresponds with the set first scribe line, using a diamond wheel after turning over the large size TFT-LCD panel 100, a tempering step that tempers for

30 minutes to form a natural crack in the scribe lines formed on the CF substrate 11 and the TFT substrate 13 of the large size TFT-LCD panel 100, a cutting step that cuts the CF substrate 11 and the TFT 13 substrate naturally cracked after the 30 minutes tempering step, and a sealing process step that sealing a cut portion formed in the cutting step may configure the present invention.

[62] Meanwhile, when a light from the backlight unit through the TFT-LCD panel 100 processed by the respective exemplary embodiments is illuminated to display a corresponding image, the image may be displayed with an image quality relatively unclear at a portion corresponding to the cutting portion.

[63] Considering this, a light blocking tape 20 may be provided to accomplish the object of the present invention by covering a certain region including the cutting portion against the light illuminated from the back light unit and realizing a clear screen quality at the display region corresponding to the cutting portion.

10 bonded above with the CF substrate 11 or at a periphery of the polarized plate 14 bonded below with the TFT substrate 14 which are removed with the set cutting portion, may maximize a clearness of the screen quality when the light from the back light unit is illuminated on the cut portion of the TFT-LCD panel 100 completed by cutting into a desirable size.

[70] Further, FIG. 10 and FIG. 11 illustrate an application of the TFT-LCD panel according to the cutting method provided by the present invention. FIG. 10 is a brief exploded perspective view of a liquid crystal display unit. FIG. 11 is a brief cross sectional view of FIG. 10.

[71] As shown in FIG. 10 and FIG. 11, the cut processed TFT-LCD panel 100 equipped with the backlight unit (not shown in drawing) below undergoes a series of course coupling a top sash 2 corresponding to an upper frame with an accommodating frame 3 accommodating the TFT-LCD panel 100 and the backlight unit to be used for the liquid crystal display unit.

[72] Here, when the TFT-LCD panel 100 cut processed in a desired size according to the present invention is received in the top sash 2 and the accommodating frame 3, a realization of a clear screen may be difficult since a slight difference may be produced, not accurately fixing the TFT-LCD panel 100, and producing a flowing phenomena because of the internal difference.

[74] Accordingly, in order to prevent the flowing phenomena, that is the flowing phenomena of the received TFT-LCD panel 100, attaching a plurality of both-faces tape 4 at the outer peripheral edge on the top sash 2 surface and attaching a plurality of both-faces tape 4 at the outer peripheral edge on the accommodating frame 3 surface as well is preferable to completely prevent the flowing phenomena.

[76] Therefore, since a large size TFT-LCD panel may be miniaturized for an application to various video games, monitors or cell phone liquid crystal displays through cut processing the large size TFT-LCD panel without a separate manufacturing line for manufacturing process according to present invention, an industrial applicability expecting an effective reduction of manufacturing facility and its value may be recognized.