JPH0424722U - - Google Patents
Info
- Publication number
- JPH0424722U JPH0424722U JP6546390U JP6546390U JPH0424722U JP H0424722 U JPH0424722 U JP H0424722U JP 6546390 U JP6546390 U JP 6546390U JP 6546390 U JP6546390 U JP 6546390U JP H0424722 U JPH0424722 U JP H0424722U
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent lamp
- lighting
- period
- lighting circuit
- panel
- 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 3
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
第１図は本考案に係る液晶デイスプレイ装置の
概略図、第２図は点灯回路の一例を示す説明図、
第３図は本考案における点灯方式を示す波形図で
あり、Ａがランプ電流波形、Ｂがランプ電圧波形
である。第４図および第５図はそれぞれ従来の点
灯方式を示す波形図であり、Ａがランプ電流波形
、Ｂがランプ電圧波形である。
１……液晶デイスプレイパネル、２……蛍光ラ
ンプ、３……点灯回路、４……反射鏡、５……光
拡散板、３１……スイツチング素子、３２……昇
圧トランス、３３……インバータ回路、３４……
制御回路。
FIG. 1 is a schematic diagram of a liquid crystal display device according to the present invention, and FIG. 2 is an explanatory diagram showing an example of a lighting circuit.
FIG. 3 is a waveform diagram showing the lighting method according to the present invention, where A is a lamp current waveform and B is a lamp voltage waveform. FIGS. 4 and 5 are waveform diagrams showing conventional lighting methods, respectively, where A is a lamp current waveform and B is a lamp voltage waveform. DESCRIPTION OF SYMBOLS 1...Liquid crystal display panel, 2...Fluorescent lamp, 3...Lighting circuit, 4...Reflector, 5...Light diffusion plate, 31...Switching element, 32...Step-up transformer, 33...Inverter circuit, 34...
control circuit.
Claims (1)
クライトを構成する蛍光ランプと、この蛍光ラン
プを点灯する点灯回路とを備えてなり、 前記点灯回路は、点灯周波数をｆ、パルス幅ｔ
と周期Ｔの比ｔ／Ｔの値をｄとするとき、 ２ｋHz≦ｆ≦５００ｋHz ０．２≦ｄ≦０．６ の関係を満足する状態で蛍光ランプをパルス点
灯させるものであることを特徴とする液晶デイス
プレイ装置。[Claims for Utility Model Registration] Comprising a liquid crystal display panel, a fluorescent lamp constituting a backlight of the panel, and a lighting circuit for lighting the fluorescent lamp, the lighting circuit having a lighting frequency of f and a pulse width of t
The fluorescent lamp is characterized in that the fluorescent lamp is lit in pulses in a state that satisfies the following relationships: 2kHz≦f≦500kHz 0.2≦d≦0.6, where d is the value of the ratio t/T of the period T and period T. LCD display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6546390U JPH0424722U (en) | 1990-06-22 | 1990-06-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6546390U JPH0424722U (en) | 1990-06-22 | 1990-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0424722U true JPH0424722U (en) | 1992-02-27 |
Family
ID=31597314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6546390U Pending JPH0424722U (en) | 1990-06-22 | 1990-06-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0424722U (en) |
-
1990
- 1990-06-22 JP JP6546390U patent/JPH0424722U/ja active Pending
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