JPH02131782U - - Google Patents
Info
- Publication number
- JPH02131782U JPH02131782U JP3940089U JP3940089U JPH02131782U JP H02131782 U JPH02131782 U JP H02131782U JP 3940089 U JP3940089 U JP 3940089U JP 3940089 U JP3940089 U JP 3940089U JP H02131782 U JPH02131782 U JP H02131782U
- Authority
- JP
- Japan
- Prior art keywords
- dimming
- variable resistor
- dimming rate
- converter
- drive signal
- 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
- 238000006243 chemical reaction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Description
第１図はこの考案に係る表示器の調光回路の一
実施例を示すブロツク図、第２図は第１図につい
ての調光特性を示す波形図、第３図は調光用可変
抵抗器の一例を示す概略構成図、第４図は従来の
表示器の調光回路の一例を示すブロツク図、第５
図は表示器の調光回路が利用される車両用ヘツド
アツプ式表示器を示す概略構成図である。
１０……波形発生回路、１１……メモリ回路、
１３……表示器、１４……ライテイングスイツチ
、１５……調光用可変抵抗器、１６……Ａ／Ｄ変
換器。
Fig. 1 is a block diagram showing one embodiment of the dimming circuit of the display device according to this invention, Fig. 2 is a waveform diagram showing the dimming characteristics of Fig. 1, and Fig. 3 is a variable resistor for dimming. FIG. 4 is a block diagram showing an example of a conventional display dimming circuit; FIG.
The figure is a schematic configuration diagram showing a head-up display for a vehicle in which a dimming circuit of the display is utilized. 10...Waveform generation circuit, 11...Memory circuit,
13...Display device, 14...Lighting switch, 15...Dimmer variable resistor, 16...A/D converter.
Claims (1)
と、この調光用可変抵抗器からの調光率に対応す
るアナログ出力をデジタル量に変換するＡ／Ｄ変
換器１６と、背景の明暗に応じて切換操作される
ライテイングスイツチ１４と、前記調光用可変抵
抗器で指示される調光率の他の物理量への背景の
明用及び暗用の変換テーブルを記憶するメモリ回
路１１と、前記Ａ／Ｄ変換器から出力される調光
率に対応するデジタル量及び前記ライテイングス
イツチの切換状況に応じて前記メモリ回路内に記
憶された変換テーブルから所定の値を選択し、前
記選択された物理量に対応する波形の駆動信号を
出力する波形発生回路１０と、この波形発生回路
からの駆動信号に応じて調光される表示器１３と
を備えてなる表示器の調光回路。 Dimming variable resistor 15 for indicating the dimming rate
, an A/D converter 16 that converts an analog output corresponding to the dimming rate from the variable resistor for dimming into a digital quantity, a lighting switch 14 that is switched according to the brightness or darkness of the background, and a memory circuit 11 that stores a conversion table for bright and dark backgrounds of the dimming rate indicated by the variable resistor for light into other physical quantities, and a dimming rate output from the A/D converter; a waveform generation circuit that selects a predetermined value from a conversion table stored in the memory circuit according to a corresponding digital quantity and a switching status of the writing switch, and outputs a drive signal with a waveform corresponding to the selected physical quantity; 10, and a display 13 that is dimmed in accordance with a drive signal from the waveform generation circuit.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3940089U JPH02131782U (en) | 1989-04-03 | 1989-04-03 | |
| EP89106350A EP0340485B1 (en) | 1988-04-12 | 1989-04-11 | Control system for head-up display for automotive vehicles |
| DE68926799T DE68926799T2 (en) | 1988-04-12 | 1989-04-11 | Control system for head-up displays for motor vehicles |
| US07/337,134 US5202668A (en) | 1988-04-12 | 1989-04-12 | Control system for a head-up display for automotive vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3940089U JPH02131782U (en) | 1989-04-03 | 1989-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02131782U true JPH02131782U (en) | 1990-11-01 |
Family
ID=31548277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3940089U Pending JPH02131782U (en) | 1988-04-12 | 1989-04-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02131782U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5933091B2 (en) * | 1978-06-23 | 1984-08-13 | 積水化学工業株式会社 | Method for manufacturing bent pipes |
-
1989
- 1989-04-03 JP JP3940089U patent/JPH02131782U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5933091B2 (en) * | 1978-06-23 | 1984-08-13 | 積水化学工業株式会社 | Method for manufacturing bent pipes |
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