tft lcd ppt for sale
1.0 GENERAL DESCRIPTION 1.1 Introduction BP101WX1-600 is a color active matrix TFT LCD module using amorphous silicon TFT"s (Thin Film Transistors) as an active switching devices. This module has a inch diagonally measured active area with WXGA resolutions (1280 horizontal by 800 vertical pixel array). Each pixel is divided into RED, GREEN, BLUE dots which are arranged in vertical stripe and this module can display 16.7M colors. Connector (CN1) TFT LCD Panel 1280 × 800 MIPI Input Signal MiniLVDS Signal Gate Driver Timing Controller DC/DC Gamma Vcom VDD Source Driver V_LED LED Driver FPC Back Light (SMD LED Array) 1.2 Features 4 Lane MIPI Interface Thin and light weight Display 16.7M colors High luminance and contrast ratio and wide viewing angle RoHS Compliant
2.0 ABSOLUTE MAXIMUM RATINGS The followings are maximum values which, if exceed, may cause faulty operation or damage to the unit. The operational and non-operational maximum voltage and current values are listed in Table 2. < Table 2. LCD Module Electrical Specifications > [Ta =25±2 ℃] Parameter Symbol Min. Max. Unit Remarks Power Supply Voltage (LCD Module) VDD -0.3 4.2 V Back-light Power Supply Voltage VLED 19 Back-light LED Current ILED - 126 mA Back-light LED Reverse Voltage VR 2 Operating Temperature TOP +50 ℃ 1) Storage Temperature TST -20 +60 Note : 1) Temperature and relative humidity range are shown in the figure below. Wet bulb temperature should be 39 ℃ max. and no condensation of water.
< Table 3. LCD Module Electrical Specifications > [Ta =25±2 ℃] Parameter Symbol Values Unit Notes Min Typ. Max Power Supply Input Voltage VDD 3.0 3.3 3.6 V Note 1 Power Supply Current IDD - 303 mA Back-light Power Supply Voltage VLED 16.8 19 Note 2 Back-light Power Supply Current ILED 120 Power Consumption PD 0.85 W white pattern PBL 2.3 W/ Driver PTotal 3.15 Notes : 1. The supply voltage is measured and specified at the interface connector of LCM. The current draw and power consumption specified is for 3.3V at 25 ℃ Max value at White Pattern 2. Calculated value for reference (VLED X ILED)
4.1 Overview The test of Optical specifications shall be measured in a dark room (ambient luminance 1lux and temperature = 252℃) with the equipment of Luminance meter system (Goniometer system and TOPCON BM-5) and test unit shall be located at an approximate distance 50cm from the LCD surface at a viewing angle of θ and Φ equal to 0. While scanning θand/or Ø, the center of the measuring spot on the Display surface shall stay fixed. The backlight should be operating for 30 minutes prior to measurement. VDD shall be 3.3+/- 0.3V at 25C. Optimum viewing angle direction is 6 ’clock. 4.2 Optical Specifications
viewing angles are determined for the horizontal or 3, 9 o’clock direction and the vertical or 6, 12 o’clock direction with respect to the optical axis which is normal to the LCD surface (see FIGURE 1). 2. Contrast measurements shall be made at viewing angle of Θ= 0 and at the center of the LCD surface. Luminance shall be measured with all pixels in the view field set first to white, then to the dark (black) state . (see FIGURE 1) Luminance Contrast Ratio (CR) is defined mathematically. 3. Center Luminance of white is defined as luminance values of 5point average across the LCD surface. Luminance shall be measured with all pixels in the view field set first to white. This measurement shall be taken at the locations shown in FIGURE 2 for a total of the measurements per display, the LED current is set at 20mA. 4. The White luminance uniformity on LCD surface is then expressed as : ΔY = Minimum Luminance of 5 (13)points / Maximum Luminance of 5(13) (points (see FIGURE 2). 5. The color chromaticity coordinates specified in Table 5 shall be calculated from the spectral data measured with all pixels first in red, green, blue and white. Measurements shall be made at the center of the panel. 6. The electro-optical response time measurements shall be made as FIGURE 3 by switching the “data” input signal ON and OFF. The times needed for the luminance to change from 10% to 90% is Tr, and 90% to 10% is Td. 7. Cross-Talk of one area of the LCD surface by another shall be measured by comparing the luminance (YA) of a 25mm diameter area, with all display pixels set to a gray level, to the luminance (YB) of that same area when any adjacent area is driven dark. (See FIGURE 4). CR = Luminance when displaying a white raster Luminance when displaying a black raster
4.3 Optical measurements Figure 1. Measurement Set Up View angel range measurement setup Center of the screen TFT-LCD module LCD panel Photo detector (TOPCON BM-5A) 50 cm Field = 1 o Figure 2. White Luminance and Uniformity Measurement Locations (5 points) Center Luminance of white is defined as luminance values of center 5 points across the LCD surface. Luminance shall be measured with all pixels in the view field set first to white. This measurement shall be taken at the locations shown in FIGURE 2 for a total of the measurements per display. The White luminance uniformity on LCD surface is then expressed as : ΔY5 = Minimum Luminance of 5 points / Maximum Luminance of 5points (see FIGURE 2).
The White luminance uniformity on LCD surface is then expressed as : ΔY13 = Minimum Luminance of 13 points /Maximum Luminance of 13 points (see FIGURE 3). The White luminance uniformity of 5 point is the same test method as 13 point using FIGURE 2. Figure 4. Response Time Testing Display data Optical Response White (TFT ON) Black (TFT OFF) 100% 90% 10% 0% TR TF Time The electro-optical response time measurements shall be made as shown in FIGURE 4 by switching the “data” input signal ON and OFF. The times needed for the luminance to change from 10% to 90% is Tr and 90% to 10% is Td.
YA (768,300) L0 YB(768, 300) 768,150 L31 256,150 VIEW AREA 768,450 256,450 YB - YA YA Cross-Talk (%) = × 100 Where: YA = Initial luminance of measured area (cd/m2) YB = Subsequent luminance of measured area (cd/m2) The location measured will be exactly the same in both patterns. Cross-Talk of one area of the LCD surface by another shall be measured by comparing the luminance (YA) of a 25mm diameter area, with all display pixels set to a gray level, to the luminance (YB) of that same area when any adjacent area is driven dark (Refer to FIGURE 5).
- A common substrate is glass since the primary application of TFT’s are Liquid Crystal Displays.
- Silicon
WHAT IS TFT LCD ?
- It is common in notebook computers , that it has transistor for each pixel.
HOW DO THEY WORK ?
- Millions of pixels create an image on the display.
- TFT’s act as switches to individually turn ‘on’ and ‘off’ for each pixel.
- Active elements
DISADVANTGES
- The liquid crystals inside the display are poisonous
- Spills off from a cracked display should be washed with soapwater.
The statistic shows the supply and demand for large thin-film transistor liquid crystal displays (TFT LCD) worldwide from 2015 to 2021. Demand for large TFT LCDs is expected to rise to around 217 million square meters in 2021.Read moreLarge thin-film transistor liquid crystal display (TFT LCD) supply and demand worldwide from 2015 to 2021(in million square meters)CharacteristicDemandCapacity---
Statista. (July 19, 2018). Large thin-film transistor liquid crystal display (TFT LCD) supply and demand worldwide from 2015 to 2021 (in million square meters) [Graph]. In Statista. Retrieved January 01, 2023, from https://www.statista.com/statistics/883811/worldwide-tft-lcd-display-supply-demand/
Statista. "Large thin-film transistor liquid crystal display (TFT LCD) supply and demand worldwide from 2015 to 2021 (in million square meters)." Chart. July 19, 2018. Statista. Accessed January 01, 2023. https://www.statista.com/statistics/883811/worldwide-tft-lcd-display-supply-demand/
Statista. (2018). Large thin-film transistor liquid crystal display (TFT LCD) supply and demand worldwide from 2015 to 2021 (in million square meters). Statista. Statista Inc.. Accessed: January 01, 2023. https://www.statista.com/statistics/883811/worldwide-tft-lcd-display-supply-demand/
Statista. "Large Thin-film Transistor Liquid Crystal Display (Tft Lcd) Supply and Demand Worldwide from 2015 to 2021 (in Million Square Meters)." Statista, Statista Inc., 19 Jul 2018, https://www.statista.com/statistics/883811/worldwide-tft-lcd-display-supply-demand/
Statista, Large thin-film transistor liquid crystal display (TFT LCD) supply and demand worldwide from 2015 to 2021 (in million square meters) Statista, https://www.statista.com/statistics/883811/worldwide-tft-lcd-display-supply-demand/ (last visited January 01, 2023)
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