JPH0247689U - - Google Patents
Info
- Publication number
- JPH0247689U JPH0247689U JP12551688U JP12551688U JPH0247689U JP H0247689 U JPH0247689 U JP H0247689U JP 12551688 U JP12551688 U JP 12551688U JP 12551688 U JP12551688 U JP 12551688U JP H0247689 U JPH0247689 U JP H0247689U
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- reference voltage
- video signal
- display device
- 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.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims 2
- 230000002265 prevention Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Transforming Electric Information Into Light Information (AREA)
Description
第１図及び第２図は本考案の一実施例を示すも
ので、第１図は全体の構成を示すブロツク図、第
２図は第１図におけるＡ／Ｄコンバータの詳細を
示す回路構成図である。
１１……入力端子、１２……カラーデコーダ、
１３……Ａ／Ｄコンバータ、１４……同期分離回
路、１５……タイミングジエネレータ、１６……
走査線補間装置、１７……セグメントドライバ、
１８……コモンドライバ、１９……液晶表示パネ
ル、２０……基準電圧発生回路、２１……ノイズ
ジエネレータ、３２……分圧回路、３３ａ〜３３
ｎ−１……コンパレータ、３５……エンコーダ／
ラツチ回路。
Figures 1 and 2 show an embodiment of the present invention; Figure 1 is a block diagram showing the overall configuration, and Figure 2 is a circuit diagram showing details of the A/D converter in Figure 1. It is. 11...Input terminal, 12...Color decoder,
13...A/D converter, 14...Synchronization separation circuit, 15...Timing generator, 16...
Scanning line interpolation device, 17... segment driver,
18... Common driver, 19... Liquid crystal display panel, 20... Reference voltage generation circuit, 21... Noise generator, 32... Voltage dividing circuit, 33a to 33
n-1 ...Comparator, 35...Encoder/
latch circuit.
Claims (1)
において、入力するアナログ映像信号をデジタル
映像信号に変換する変換手段と、この変換手段に
基準電圧を供給する基準電圧発生手段と、上記基
準電圧に不特定周波数のノイズを重畳させるノイ
ズ発生手段とを具備し、上記不特定周波数のノイ
ズが重畳した基準電圧により、上記デジタル映像
信号の各階調間の中間階調を上記液晶表示装置に
表示するようにしたことを特徴とする液晶表示装
置の偽輪郭防止装置。 In a liquid crystal display device that displays images on a liquid crystal display panel, a conversion means for converting an input analog video signal into a digital video signal, a reference voltage generation means for supplying a reference voltage to the conversion means, and an unspecified voltage for the reference voltage. and a noise generating means for superimposing noise of a certain frequency, so that an intermediate gray scale between each gray scale of the digital video signal is displayed on the liquid crystal display device using a reference voltage on which the noise of an unspecified frequency is superimposed. A false contour prevention device for a liquid crystal display device, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988125516U JP2526128Y2 (en) | 1988-09-26 | 1988-09-26 | Image display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988125516U JP2526128Y2 (en) | 1988-09-26 | 1988-09-26 | Image display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0247689U true JPH0247689U (en) | 1990-03-30 |
| JP2526128Y2 JP2526128Y2 (en) | 1997-02-19 |
Family
ID=31376194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988125516U Expired - Lifetime JP2526128Y2 (en) | 1988-09-26 | 1988-09-26 | Image display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2526128Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5883892A (en) * | 1981-11-13 | 1983-05-19 | シャープ株式会社 | Picture display |
-
1988
- 1988-09-26 JP JP1988125516U patent/JP2526128Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5883892A (en) * | 1981-11-13 | 1983-05-19 | シャープ株式会社 | Picture display |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2526128Y2 (en) | 1997-02-19 |
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