JPH0448514U - - Google Patents
Info
- Publication number
- JPH0448514U JPH0448514U JP8954190U JP8954190U JPH0448514U JP H0448514 U JPH0448514 U JP H0448514U JP 8954190 U JP8954190 U JP 8954190U JP 8954190 U JP8954190 U JP 8954190U JP H0448514 U JPH0448514 U JP H0448514U
- Authority
- JP
- Japan
- Prior art keywords
- backlight
- drive circuit
- regulator
- supply current
- control
- 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
- 239000004973 liquid crystal related substance Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Transforming Electric Information Into Light Information (AREA)
Description
第１図は本考案のバツクライト調光装置の一実
施例を示すブロツク図、第２図は第１図における
接続回路を流れる電流を示す図、第３図は従来の
バツクライト調光装置を示すブロツク図である。
１……電源電池、３……駆動回路（インバータ
回路）、５……バツクライト、７……液晶表示素
子、９……接続回路、１１……制御手段（動作処
理回路）、Ｒ……抵抗、Ｔｒ……第２の調節器（
無接点スイツチ：トランジスタ）、ＶＲ……第１
の調節器（可変抵抗器）。
Fig. 1 is a block diagram showing an embodiment of the backlight dimming device of the present invention, Fig. 2 is a diagram showing the current flowing through the connection circuit in Fig. 1, and Fig. 3 is a block diagram showing a conventional backlight dimming device. It is a diagram. DESCRIPTION OF SYMBOLS 1... Power supply battery, 3... Drive circuit (inverter circuit), 5... Back light, 7... Liquid crystal display element, 9... Connection circuit, 11... Control means (operation processing circuit), R... Resistor, Tr...Second regulator (
Non-contact switch: transistor), VR...1st
regulator (variable resistor).
Claims (1)
てのバツクライトと、 このバツクライトを前記電源電池から供給され
る電力によつて調光駆動するとともに前記電源電
池からの供給電流を制御する駆動回路と、 この駆動回路に接続され前記駆動回路を介して
前記供給電流を可変して前記バツクライトの光量
を外部から手動調節する第１の調節器と、 を具備するバツクライト調光装置において、 前記供給電流を可変制御するために制御信号を
送出する制御手段と、 前記第１の調節器の駆動回路との接続回路に配
置され、印加された前記制御信号の切換えによつ
て前記駆動回路を介して前記供給電流を自動的に
可変制御し、前記バツクライトの光量を切換える
第２の調節器と、 を有することを特徴とするバツクライト調光装置
。 (2) 前記第２の調節器は、前記接続回路に流れ
る電流を可変制御する無接点スイツチである請求
項１記載のバツクライト調光装置。[Claims for Utility Model Registration] (1) A backlight as a light source disposed behind a liquid crystal display element, and a backlight that is dimmed and driven by electric power supplied from the power supply battery, and a A backlight adjustment comprising: a drive circuit that controls a supply current; and a first regulator connected to the drive circuit that manually adjusts the amount of light of the backlight from the outside by varying the supply current via the drive circuit. In the optical device, a control means for sending out a control signal to variably control the supplied current is disposed in a connection circuit between a drive circuit of the first regulator, and is configured to control the supply current by switching the applied control signal. A backlight dimming device comprising: a second regulator that automatically variably controls the supply current via the drive circuit and switches the amount of light of the backlight. (2) The backlight dimming device according to claim 1, wherein the second regulator is a non-contact switch that variably controls the current flowing through the connection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8954190U JPH0448514U (en) | 1990-08-29 | 1990-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8954190U JPH0448514U (en) | 1990-08-29 | 1990-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0448514U true JPH0448514U (en) | 1992-04-24 |
Family
ID=31823592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8954190U Pending JPH0448514U (en) | 1990-08-29 | 1990-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0448514U (en) |
-
1990
- 1990-08-29 JP JP8954190U patent/JPH0448514U/ja active Pending
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