LG GW620 - Choosing a color effect

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. Technical Brief
3.14.4.1 Touch Windows Interface
GW620 Touch screen is a press sensor with an attached flexible PCB.
GW620 4-wire resistive touch pannel. Resistive touch screen use the voltage divider principle to generate
voltage that represent X and Y coordinates.
Figure. Touch window Sensor Schematic
U17
Figure. Touch window Sensor Block Diagram
LCD connector(CN1)
R41
1
C58 C31
CN1
2922
3021
3120
3219
3318
3417
3516
3615
3714
3813
3912
4011
4110
429
438
447
456
465
474
483
492
501
VREG_PROX_2.8V
+VPWR
LCD_RESET_N
TOUCH_XPLUS
TOUCH_YPLUS
TOUCH_YMINUS
TOUCH_XMINUS
SLIDE_KPD_DRV_N
LCD_VSYNC_O
LCD_PWM
PROX_OUT
MDDI_P_STB_P
PROX_I2C_SDA
PROX_I2C_SCL
KEY_COL[7]
KEY_ROW[3]
E2
D2
E1
D1
C1
WIPER
YM_LR
YP_UR
XM_LL
XP_UL
TOUCH_XPLUS
TOUCH_YPLUS
TOUCH_YMINUS
TOUCH_XMINUS