JPS6478084A - Luminance adjusting circuit for liquid crystal television - Google Patents

Luminance adjusting circuit for liquid crystal television

Info

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
Application number
JP62235135A
Other languages
Japanese (ja)
Inventor
Keiichi Otake
Kazunori Yamate
Tsutomu Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62235135A priority Critical patent/JPS6478084A/en
Publication of JPS6478084A publication Critical patent/JPS6478084A/en
Pending legal-status Critical Current

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.
JP62235135A 1987-09-18 1987-09-18 Luminance adjusting circuit for liquid crystal television Pending JPS6478084A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54124928A (en) * 1978-03-22 1979-09-28 Seiko Epson Corp Liquid crystal television set

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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