What are the important parameters of automotive LCD? The following is a brief introduction to the segment code screen:
Viewing angle and response speeds are common characteristics and common differences of automotive LCDs.
Nowadays, the screens on mobile phones are the most commonly used screens, collectively called TFT screens. There is basically no attenuation of the viewing angle range, while the low-end TN, HTN, and STN automotive LCDs have obvious viewing angle differences.
Noun parameters in the industry: 6H, 9H, 3H, 12H. That is the direction at 6 o'clock, 9 o'clock, 3 o'clock, and 12 o'clock. Take a hanging clock as a reference to illustrate the direction of view, 6
Point is looking up, 3 points are left view, 9 point is right view, and 12 point is a top view. It is especially critical when purchasing.
Temperature is also one of the main parameters of automotive LCD. During the customization period, the screen factory will send a drawing with such essential parameters, "working temperature, storage temperature" two
item. Pay attention to this parameter when designing, and consider the environment in which the product works. The LCD screen is generally divided into 3-4 ranges, room temperature (0-50) range, wide temperature (-20-75) range, ultra
Wide temperature (-30-85) range. The following reaction will occur when the selection is wrong: the reaction will be slow at low temperature, and there will be a background shadow at high temperature.
Drive mode and voltage
The drive mode is the setting that matches the drive IC, so you should select the drive IC before selecting the LCD. There are detailed instructions in the drive IC. Or it can be directly made into a display module without taking the test
Considering this context, the terminology in the industry is duty cycle and bias ratio. As long as these two parameters are provided, the LCD screen factory will have a solution, and the voltage also needs to be provided.
Needless to say, this is a form for software programming to identify the address of the LCD
That is to say, the effect is displayed. At present, the low-end screen can only be black and white. The display principle of the automotive LCD shows that it cannot emit light, so it needs the bottom backlight to see clearly, so it derives a positive mode, a negative mode, and a fully transparent mode. In translucent mode, there can be many combinations between them. Under normal circumstances, the positive mode is a black and white background, the negative mode needs to add the bottom backlight, black and low backlight, and the translucent mode is the positive bottom backlight, fully transparent There are negative and positive modes, and most of them are backlit displays.
There are many ways to link glass devices, such as hot pressing paper, zebra strips, metal feet, flexible cables, etc.