JPS63117175U

JPS63117175U -

Info

Publication number: JPS63117175U
Application number: JP600887U
Authority: JP
Priority date: 1987-01-21
Filing date: 1987-01-21
Publication date: 1988-07-28

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の液晶表示装置を示
すブロツク図、第２図は第１図の表示制御回路に
入力する垂直タイミング信号の説明図、第３図は
ＮＴＳＣ信号におけるＣＲＴと液晶表示体の画面
走査方法の違いを説明する説明図、第４図は第１
図の表示制御回路の具体的回路の一例を示す回路
図、第５図は第４図の回路動作を説明するタイミ
ング図である。１……ビデオ信号入力端子、２……ビデオクロ
マ処理回路、３……水平垂直タイミング発生回路
、４……表示制御回路、５……切換スイツチ、６
，７……Ｘドライバ、８，９……Ｙドライバ、１
０……液晶表示体。 FIG. 1 is a block diagram showing a liquid crystal display device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of vertical timing signals input to the display control circuit of FIG. 1, and FIG. An explanatory diagram explaining the difference in the screen scanning method of the display body, Figure 4 is the first
FIG. 5 is a circuit diagram showing an example of a specific circuit of the display control circuit shown in the figure, and FIG. 5 is a timing diagram illustrating the circuit operation of FIG. 4. DESCRIPTION OF SYMBOLS 1... Video signal input terminal, 2... Video chroma processing circuit, 3... Horizontal/vertical timing generation circuit, 4... Display control circuit, 5... Selector switch, 6
, 7...X driver, 8, 9...Y driver, 1
0...Liquid crystal display.

Claims

[Claims for Utility Model Registration] Video signal processing means for demodulating a video signal supplied as an input; and a timing generation circuit for generating horizontal and vertical cycle timing signals based on a synchronization signal included in the video signal. , Based on the vertical cycle timing signal from this timing generation circuit, a first display timing pulse having a display period for each field is generated, while a second display timing pulse having a display period of one field per frame period is generated. a display control circuit having a function of generating a display timing pulse; a changeover switch connected to the display control circuit for switching between the first or second display timing pulse generation function; and the display. The video signal demodulated by the video signal processing means is displayed on a liquid crystal display in accordance with the first or second display timing pulse from the control circuit and the horizontal period timing signal from the timing generation circuit and in response to switching of the changeover switch. 1. A liquid crystal display device comprising driver means for horizontal and vertical scanning to display one field at a time or to display only one field in one frame period.