china i2c iic oled lcd module in stock

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OLED (Organic Light-Emitting Diode) is a self light-emitting technology composed of a thin, multi-layered organic film placed between an anode and cathode. In contrast to LCD technology, OLED does not require a backlight. OLED possesses high application potential for virtually all types of displays and is regarded as the ultimate technology for the next generation of flat-panel displays.

This is an OLED monochrome 128x64 dot matrix display module with I2C Interface. Comparing to LCD, OLED screens are way more competitive, which has a number of advantages such as high brightness, self-emission, high contrast ratio, wide viewing angle, wide temperature range, and low power consumption.

OLED"s basic structure consists of organic materials positioned between the cathode and the anode, which is composed of electric conductive transparent Indium Tin Oxide (ITO). The organic materials compose a multi-layered thin film, which includes the Hole Transporting Layer (HTL), Emission Layer (EML) and the Electron Transporting Layer (ETL). By applying the appropriate electric voltage, holes and electrons are injected into the EML from the anode and the cathode, respectively. The holes and electrons combine inside the EML to form excitons, after which electroluminescence occurs. The transfer material, emission layer material and choice of electrode are the key factors that determine the quality of OLED components.

SSD1306 is an OLED controller with 128 x 64 pixels, but this OLED only supports 128*32 pixels, so this screen only uses the first half of the SSD1306 buffer area.

This OLED supports communication methods such as 8bit 8080 parallel, 8bit 6800 parallel, three-wire SPI, four-wire SPI, and I2C. However, the first four communication methods are not adopted, we only adopt the I2C communication as the result of the size of the module and the limited IO resources.

After the compilation is complete, the main file is generated, enter the command according to the OLED model you are using. If you have purchased a 1.3inch OLED Module (C), please enter the following command:

2. The module_init() function is automatically called in the INIT () initializer on the LCD, but the module_exit() function needs to be called by itself

Python has an image library PIL official library link, it do not need to write code from the logical layer like C, can directly call to the image library for image processing. The following will take 1.54inch LCD as an example, we provide a brief description for the demo.

Choose the folder according to the LCD model you are using, and open the xxx.ino file. Take the 1.3inch OLED Module (C) as an example: open OLED_1in3_c, then double-click OLED_1in3_c.ino to open the Arduino project.

For examples, if you are using 1.3inch OLED Module （C）,you need to comment out the line 105. (Note: there cannot be multiple sentences without comment at the same time; the line number may be changed, please modify it according to the actual situation)

The demo is developed based on the HAL library. Download the demo, find the STM32 program file directory, and open the oled_demo.uvprojx in the STM32\STM32F103RBT6\MDK-ARM directory to check the program.

In addition, you can see the file directory of the project in the STM32\STM32-F103RBT6\User\ directory. The five folders are the underlying driver, sample program, font, GUI, and OLED driver.

OLED does not have a backlight, and the display is self-illuminating. Only connect VCC and GND, the OLED will not light up. Program control is required to brighten the OLED.

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128x64 0.96 inchOled DisplayScreenIoToffers you an elegant interface for your projects.SSD1306Using the processor, the oled display communicates with the I2C protocol. On this screen, which has 4 pins, vcc + 5V, gnd ground, sda and scl are i2c pins.

Hi Oliver – I finally got around to trying out your u8glib code suggestions and you are correct, either of the following SH1106 constructor code lines works with my 1.3” I2C 128x64 OLED (4 pins; Vcc, GND, SCL, SDA) – that is up to a certain point, see below:

However, when I run your “Menu” and “Colour” programs nothing seems to happen, that is I get the four menu items printed to the OLED in the former case and just the “Hello World” in the latter?

In all of my digging into various websites I have located the Datasheet and Specification Manual for the SH1106 Driver for my OLED and have attached them to this post for all who might be interested.

These two documents have to be the very best Chinese to English translations for technical documents I have ever seen and there is a wealth of information contained in them which is clearly well over and above standard Datasheets info! For instance, it shows you how to select the other protocols that this OLED can utilize if you want to run the OLED under SPI etc, etc., rather than I2C! Additionally, the Spec manual not only shows you which chip locations are to be addressed and what values are to be used but it also includes sample (Arduino??) code for this, as well. Directly programming the control chip is a bit out of my league at that moment!!!

The SH1106 Manual clearly states that Pull-up resistors are definitely required for this OLED but there is ambiguity on just what is the correct(?) value to be used. One other site I visited has investigated this in depth and has determined that 4K7 ohms is the “best value for this pull-up resistor” and that is what I have used – refer the attached pics. The chip actually has 132x64 resolution capability but the display is set inside this to 128x64.

The chip handling section towards the end of the Spec Manual also includes information on what not to clean your OLED with, which in the absence of knowing you might otherwise use and create problems for your chip or OLED!!!

As good as these translations are there are still the odd few examples of wrong words appearing – one very humorous one was; “if your OLED gets ‘dewed’ [meaning wet!], it will corrode the pins ………”

One final question is, I have noted that various 0.96” and 1.3” monochrome OLED LCDs have either a green tag (as in my case) or a red tag on them when purchased – what is the significance of these coloured tags as I have not been able to find any reference to them???