JPH0426142U - - Google Patents
Info
- Publication number
- JPH0426142U JPH0426142U JP6921690U JP6921690U JPH0426142U JP H0426142 U JPH0426142 U JP H0426142U JP 6921690 U JP6921690 U JP 6921690U JP 6921690 U JP6921690 U JP 6921690U JP H0426142 U JPH0426142 U JP H0426142U
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal panel
- headlamp
- drive circuit
- light emitter
- 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 11
- 230000008034 disappearance Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 1
Description
第１図はこの考案の一実施例の前照灯用放電灯
点灯装置の構成を示すブロツク図、第２図は液晶
パネルの遮光パターンを示す平面図、第３図およ
び第４図はビームの方向が切り替わる様子を示す
概略図、第５図は第１図における昇圧回路および
液晶パネル駆動回路の具体構成を示す回路図、第
６図は前照灯用放電灯点灯装置の従来例の構成を
示すブロツク図である。
１……直流電源、２Ａ……点灯回路部、３……
発光体、４……前照灯用灯具、５……反射板、６
……前面ガラス、７……昇圧回路、８……主点灯
回路、９……液晶パネル駆動回路、１１……ビー
ム切替スイツチ、１２……液晶パネル、１３……
遮光パターン。
Fig. 1 is a block diagram showing the configuration of a headlamp discharge lamp lighting device according to an embodiment of this invention, Fig. 2 is a plan view showing the light shielding pattern of the liquid crystal panel, and Figs. 3 and 4 show the beam pattern. FIG. 5 is a circuit diagram showing the specific configuration of the booster circuit and liquid crystal panel drive circuit in FIG. 1, and FIG. 6 is a schematic diagram showing how the direction is switched. FIG. FIG. 1...DC power supply, 2A...Lighting circuit section, 3...
Luminous body, 4... Headlight lamp, 5... Reflector, 6
... Front glass, 7 ... Boost circuit, 8 ... Main lighting circuit, 9 ... Liquid crystal panel drive circuit, 11 ... Beam selection switch, 12 ... Liquid crystal panel, 13 ...
shading pattern.
Claims (1)
用灯具と、前記発光体を点灯させる点灯回路部と
、前記発光体の前方位置に配置されて前記前照灯
用灯具の照射領域を切り替える遮光パターンが形
成された液晶パネルと、この液晶パネルの透明電
極に給電して前記遮光パターンを出現させる液晶
パネル駆動回路と、この液晶パネル駆動回路と前
記液晶パネルの透明電極との間に介在して前記遮
光パターンの出現・消滅を切り替えるビーム切替
スイツチとを備えた前照灯用放電灯点灯装置。 A headlamp having a high-intensity discharge lamp as a light emitter, a lighting circuit unit for lighting the light emitter, and a light-shielding pattern disposed in front of the light emitter to switch the irradiation area of the headlamp. a liquid crystal panel on which is formed a liquid crystal panel, a liquid crystal panel drive circuit that supplies power to the transparent electrode of this liquid crystal panel to make the light-shielding pattern appear, and a liquid crystal panel drive circuit that is interposed between this liquid crystal panel drive circuit and the transparent electrode of the liquid crystal panel to A discharge lamp lighting device for a headlamp, which is equipped with a beam changeover switch that switches between appearance and disappearance of a shading pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6921690U JPH0426142U (en) | 1990-06-26 | 1990-06-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6921690U JPH0426142U (en) | 1990-06-26 | 1990-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0426142U true JPH0426142U (en) | 1992-03-02 |
Family
ID=31604327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6921690U Pending JPH0426142U (en) | 1990-06-26 | 1990-06-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0426142U (en) |
-
1990
- 1990-06-26 JP JP6921690U patent/JPH0426142U/ja active Pending
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