Common problems

1. Does OLED have a transmittance?

OLEDs have no backlight, rely on their own illumination, do not need a backlight, so there is no transmittance. The TFT itself does not emit light, the back light provides a light source, and the light is reduced when the light passes through the glass.

2. Display refresh rate

The refresh rate determines whether the animation you are looking for is smooth and detailed. The refresh rate setting has nothing to do with PPI. It refers to the number of frames of the image displayed per second on the screen. The 60Hz refresh rate is 60 frames per second. 120Hz means 120 frames per second, and so on.

3. DPI and PPI

DPI (Dots Per Inch) was originally used to measure the density of dots per inch on printed matter, that is, how many points your printer can play in one inch. The smaller the DPI value, the less detailed the picture.

When the concept of DPI is used on a computer screen, it should be called PPI (Pixels Per Inch). PPI is the number of pixels that can be displayed per inch on a computer screen.

4. If the chip is changed, does the customer need to change the firmware or hardware interface?

No need to change the program firmware or hardware interface, we will provide an initialization code to debug the client.

5. The screen interface is MCU 8bit, but the client side is MCU 32bit, can it be compatible?

Yes, the customer only needs to connect 8 bits, and the other ones are free.

6. What is the difference between MIPI 2 channel and 4 channel?

The large size is generally 4 channels, which is related to the signal transmission speed.

7. Can the backlight voltage be changed to an input voltage of about 3.3V?

Yes, the LEDs can be changed to parallel, and the FPC can be customized.

8. What does CSI and DSI mean in the MIPI agreement?

CSI/DSI means that it is carried for Camera or Display applications.