JPH03125333U - - Google Patents
Info
- Publication number
- JPH03125333U JPH03125333U JP3488590U JP3488590U JPH03125333U JP H03125333 U JPH03125333 U JP H03125333U JP 3488590 U JP3488590 U JP 3488590U JP 3488590 U JP3488590 U JP 3488590U JP H03125333 U JPH03125333 U JP H03125333U
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal panel
- light source
- detection circuit
- video signal
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Processing Of Color Television Signals (AREA)
Description
第１図はこの考案の一実施例のブロツク図、第
２図はこの考案の一実施例の動作説明に用いる各
部波形図である。
図面における主要な符号の説明、１……液晶パ
ネル、２……熱陰極管、５……ＡＰＬ検出回路、
６……パルス幅変調回路。
FIG. 1 is a block diagram of an embodiment of this invention, and FIG. 2 is a waveform diagram of each part used to explain the operation of an embodiment of this invention. Explanation of main symbols in the drawings, 1...Liquid crystal panel, 2...Hot cathode tube, 5...APL detection circuit,
6...Pulse width modulation circuit.
Claims (1)
出回路と、 上記平均的レベル変動に追従して上記表示用光
源に対する駆動信号の供給期間の長さを変調する
変調回路と からなる液晶表示装置。[Scope of Claim for Utility Model Registration] A liquid crystal panel to which a video signal is supplied, a display light source for the liquid crystal panel, a detection circuit for detecting average level fluctuations of the video signal, and a detection circuit for following the average level fluctuation. and a modulation circuit that modulates the length of a supply period of a drive signal to the display light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3488590U JPH03125333U (en) | 1990-03-30 | 1990-03-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3488590U JPH03125333U (en) | 1990-03-30 | 1990-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03125333U true JPH03125333U (en) | 1991-12-18 |
Family
ID=31539750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3488590U Pending JPH03125333U (en) | 1990-03-30 | 1990-03-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03125333U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002031846A (en) * | 2000-05-08 | 2002-01-31 | Canon Inc | Display device and video signal processor |
| JP2006330743A (en) * | 2006-06-26 | 2006-12-07 | Seiko Epson Corp | Display device and projection type display device |
| JP2007065608A (en) * | 2005-08-30 | 2007-03-15 | Taida Electronic Ind Co Ltd | Device and method for improving image contrast |
| WO2007046320A1 (en) * | 2005-10-18 | 2007-04-26 | Sharp Kabushiki Kaisha | Liquid crystal display |
| JP2007164202A (en) * | 2000-05-08 | 2007-06-28 | Canon Inc | Display apparatus and image signal processing apparatus |
| US8259059B2 (en) | 2008-02-12 | 2012-09-04 | Lg Display Co., Ltd. | Driving system capable of improving contrast ratio for liquid crystal display device, liquid crystal display device including the same, and driving method using the same |
| US8432352B2 (en) | 2008-05-02 | 2013-04-30 | Lg Display Co., Ltd. | Backlight driving circuit and driving method for driving the same |
-
1990
- 1990-03-30 JP JP3488590U patent/JPH03125333U/ja active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002031846A (en) * | 2000-05-08 | 2002-01-31 | Canon Inc | Display device and video signal processor |
| JP2007164202A (en) * | 2000-05-08 | 2007-06-28 | Canon Inc | Display apparatus and image signal processing apparatus |
| JP4574057B2 (en) * | 2000-05-08 | 2010-11-04 | キヤノン株式会社 | Display device |
| JP4630863B2 (en) * | 2000-05-08 | 2011-02-09 | キヤノン株式会社 | Display device and control method thereof |
| JP2007065608A (en) * | 2005-08-30 | 2007-03-15 | Taida Electronic Ind Co Ltd | Device and method for improving image contrast |
| WO2007046320A1 (en) * | 2005-10-18 | 2007-04-26 | Sharp Kabushiki Kaisha | Liquid crystal display |
| JP2006330743A (en) * | 2006-06-26 | 2006-12-07 | Seiko Epson Corp | Display device and projection type display device |
| JP4609385B2 (en) * | 2006-06-26 | 2011-01-12 | セイコーエプソン株式会社 | Display device and projection display device |
| US8259059B2 (en) | 2008-02-12 | 2012-09-04 | Lg Display Co., Ltd. | Driving system capable of improving contrast ratio for liquid crystal display device, liquid crystal display device including the same, and driving method using the same |
| US8432352B2 (en) | 2008-05-02 | 2013-04-30 | Lg Display Co., Ltd. | Backlight driving circuit and driving method for driving the same |
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