JPS6478084A - Luminance adjusting circuit for liquid crystal television - Google Patents
Luminance adjusting circuit for liquid crystal televisionInfo
- Publication number
- JPS6478084A JPS6478084A JP62235135A JP23513587A JPS6478084A JP S6478084 A JPS6478084 A JP S6478084A JP 62235135 A JP62235135 A JP 62235135A JP 23513587 A JP23513587 A JP 23513587A JP S6478084 A JPS6478084 A JP S6478084A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- direct current
- current signal
- resistance
- optimum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
- Details Of Television Systems (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
PURPOSE:To obtain an optimum picture from a separate place by converting a signal from a remote control receiving part into a digital signal and then into an analog direct current signal, resistance-dividing an output voltage, and preparing liquid crystal driving voltage. CONSTITUTION:The duty of a PWM signal 3 outputted by a microcomputer 2 is changed by the signal from a remote control light receiving part 1, the signal 1 is inverted by a transistor(TR) 15, integrated by a low pass filter consisting of resistance R22 and R21 and capacitors C12 and C11, and made into the direct current signal. The level of the direct current signal is further converted by a reversing amplifier of a TR14 and a TR13, and finally the direct current signal is added to the resistance-dividing circuits of R11-R15 by a Darlington circuit consisting of a TR12 and the TR13, and obtains driving voltages V0-V5. Thus, when a person operates a remote controller so that a picture may be optimum, the optimum luminance can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62235135A JPS6478084A (en) | 1987-09-18 | 1987-09-18 | Luminance adjusting circuit for liquid crystal television |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62235135A JPS6478084A (en) | 1987-09-18 | 1987-09-18 | Luminance adjusting circuit for liquid crystal television |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6478084A true JPS6478084A (en) | 1989-03-23 |
Family
ID=16981575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62235135A Pending JPS6478084A (en) | 1987-09-18 | 1987-09-18 | Luminance adjusting circuit for liquid crystal television |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6478084A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01223431A (en) * | 1988-03-03 | 1989-09-06 | Seiko Epson Corp | Liquid crystal display device |
JP2004157519A (en) * | 2002-11-04 | 2004-06-03 | Boe-Hydis Technology Co Ltd | Common voltage adjustment circuit of liquid crystal display device |
US7737963B2 (en) | 2001-09-27 | 2010-06-15 | Samsung Electronics Co., Ltd. | Liquid crystal display having gray voltages with varying magnitudes and driving method thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54124928A (en) * | 1978-03-22 | 1979-09-28 | Seiko Epson Corp | Liquid crystal television set |
-
1987
- 1987-09-18 JP JP62235135A patent/JPS6478084A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54124928A (en) * | 1978-03-22 | 1979-09-28 | Seiko Epson Corp | Liquid crystal television set |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01223431A (en) * | 1988-03-03 | 1989-09-06 | Seiko Epson Corp | Liquid crystal display device |
US7737963B2 (en) | 2001-09-27 | 2010-06-15 | Samsung Electronics Co., Ltd. | Liquid crystal display having gray voltages with varying magnitudes and driving method thereof |
JP2004157519A (en) * | 2002-11-04 | 2004-06-03 | Boe-Hydis Technology Co Ltd | Common voltage adjustment circuit of liquid crystal display device |
US7710414B2 (en) | 2002-11-04 | 2010-05-04 | Hydis Technologies Co., Ltd. | Common voltage regulating circuit of liquid crystal display device |
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