如图所示，电路上电后，VLED端电压仅有VCC减去二极管压降电压，并未工作。。是何原因请大家分析指出。。谢谢下面是该TFT datesheet
Pin no Symbol I/O Description Remark
1 AVDD P Power supply for analog circuits
2 AGND P Ground pins for analog circuits
3 AGND1 P Ground for Vcom driver circuit
4 AVDD1 P Power supply for Vcom driver circuit. Note 1
5 FRP O Polarity inversion output signal for Vcom Note 1
6 GRESET I Global reset pin. Note 2
7 SEL0 I Select input data path UPS051(L)or UPS052(H)
8 V_DIR I Up/Down scan control input Note 3
9 H_DIR I Left/Right scan control input Note 3
10 VLED I LED Anode
11 GLED O LED Cathode
12 DITH I 8-bit dithering. High enable dithering. Low disables dithering
and D01, D00 is ignored.
13 HSYNC I Horizontal sync input. Negative polarity
14 VSYNC I Vertical sync input. Negative polarity.
15 DCLK I Clock signal; latch data onto line latches at the rising edge.
16 GND - Ground for digital circuit
17 D07 I Data input. :MSB
18 D06 I Data input
19 D05 I Data input
20 D04 I Data input
21 D03 I Data input
22 D02 I Data input
23 D01 I Data input
24 D00 I Data input. :LSB
25 STB I Standby mode setting pin. Note 4
26 VCC P Supply voltage for digital circuit
27 GND - Ground for digital circuit
28 SHDB I Shutdown input. Active low. Note 5
29 FB VI Main boost regulator feedback input(FB threshold is 1.2V)
30 DRV VO Power transistor gate signal for the boost converter
31 VGL P Negative power for scan driver
32 VGH P Positive power for scan driver
33 GND - Ground of scan driver
34 VCOM I Common electrode driving signal |
楼主
标题置顶
标题高亮
