What is the function of VGL VGH, VCOM AVDD, CKV, and STV in LCD TV Panels?
A tiny liquid crystal cell is below the RGB subpixels of the LCD panel and above the backlight (Look at the diagram). When these crystal cells are energized, the molecular position of the Liquid crystal changes, and when de-energized, the molecules return to their normal orientation. During this process, the crystal cells act as a light barrier. When the crystal cells become entirely black, the backlight's light cannot reach the bottom of the pixels. Thus, the liquid crystals block the light waves and control the brightness of the pixels by opening the light path as needed. This liquid crystal cell has two electrodes, one of which supplies a negative voltage VCOM, the positive voltage is provided to the other terminal by the source terminal of the thin film transistor (TFT), and the AVDD voltage is supplied to the drain of this TFT. Moreover, VGH or VGL voltage is provided to the gate terminal of the TFT at a specific time to READ MORE
