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[Liquid Crystal Panel
Driving Adjustment Circuit]
7. Vertical Stripes of pixels Symptom when
Measuring
---
instrument
Test point
---
EXT trigger
---
Measurement
---
range
Input signal
shown in the Table
Input terminal
COMPUTER IN terminal
No.
Pattern
35
SVGA SMPTE (R)
36
SVGA SMPTE (G)
37
SVGA SMPTE (B)
Table
Vertical stripes of pixels
Adjustment purpose
To minimize occurence of vertical stripes of pixels.
Vertical stripes of pixels occur on the LCD panel.
incorrectly adjusted
* Make this adjustment only when vertical stripes remarkably appear on the
screen.
* Enter the adjustment commands and adjustment values of the hexadecimal
number in small alphanumeric letters.
* Carry out this adjustment after running the product for 2 minutes or more
supplying the specified test signal to it.
1. Connect this PROJECTOR to a personal computer (with Microsoft
95 Operating System). (Refer to the figure on P.1)
2. Start Microsoft
3. Start the communication program [Hyper Terminal] in Microsoft
to open the window. (For setting, refer to Hyper Terminal setting on P.2)
4. Set the following items on the picture menu.
CONTRAST . . . . . . . . . . . . . . .0
BRIGHTNESS . . . . . . . . . . . . .0
COLOR TEMP . . . . .1 (standard)
Red
5. Supply an SVGA signal (SMPTE (R), No. 35).
6. Project pictures onto the screen.
7. Enter the adjustment command [00 ~ 224
minimize the vertical stripes of pixels. Enter any value from [80] to [f0] (hex) to
for minimum vertical stripes of pixels.
(*1) When the sent command is displayed, sending is accomplished correctly.
8. Enter command for writing [00~1eab
write the changed value onto the EEPROM.
Enter the value of step 7 to
sending the command without entering any value to
Green
9. Supply an SVGA signal (SMPTE (G), No. 36).
10. Enter the adjustment command [00 ~ 225
minimize the vertical stripes of pixels. Enter any value from [80] to [f0] (hex) to
for minimum vertical stripes of pixels. (*1)
11. Enter command for writing [00 ~ 1eac
write the changed value onto the EEPROM.
Enter the value of step 10 to
sending the command without entering any value to
Blue
12. Supply an SVGA signal (SMPTE (B), No. 37).
13. Enter the adjustment command [00 ~ 226
minimize the vertical stripes of pixels. Enter any value from [80] to [f0] (hex) to
for minimum vertical stripes of pixels. (*1)
14. Enter command for writing [00 ~ 1ead
write the changed value onto the EEPROM.
Enter the value of step 13 to
sending the command without entering any value to
Windows
95 in the personal computer.
] to the Hyper Terminal window and
. The current value can be confirmed by
] to the Hyper Terminal window and
. The current value can be confirmed by
] to the Hyper Terminal window and
. The current value can be confirmed by
Windows
Windows
] to the Hyper Terminal window to
. (*1)
] to the Hyper Terminal window to
. (*1)
] to the Hyper Terminal window to
. (*1)
95
9
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