JPH0332493B2 - - Google Patents
Info
- Publication number
- JPH0332493B2 JPH0332493B2 JP59214378A JP21437884A JPH0332493B2 JP H0332493 B2 JPH0332493 B2 JP H0332493B2 JP 59214378 A JP59214378 A JP 59214378A JP 21437884 A JP21437884 A JP 21437884A JP H0332493 B2 JPH0332493 B2 JP H0332493B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- liquid crystal
- power supply
- mirror
- power
- 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.)
- Expired - Lifetime
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims description 37
- 238000010586 diagram Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/02—Rear-view mirror arrangements
- B60R1/08—Rear-view mirror arrangements involving special optical features, e.g. avoiding blind spots, e.g. convex mirrors; Side-by-side associations of rear-view and other mirrors
- B60R1/083—Anti-glare mirrors, e.g. "day-night" mirrors
- B60R1/088—Anti-glare mirrors, e.g. "day-night" mirrors using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Optical Elements Other Than Lenses (AREA)
- Liquid Crystal (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は車輌用液晶ミラーに係り、さらに詳し
くは夜間等においてネガタイプ液晶ミラーの電源
回路系が故障した場合でも、その液晶ミラーの電
源回路を補償し、正常に液晶ミラーを駆動できる
ようにした液晶ミラーの駆動電源回路に関するも
のである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a liquid crystal mirror for a vehicle, and more specifically, even if the power circuit system of a negative type liquid crystal mirror breaks down at night, etc., the power circuit of the liquid crystal mirror can be compensated for. The present invention relates to a drive power supply circuit for a liquid crystal mirror that can drive the liquid crystal mirror normally.
車輌用ルームミラーは、夜間等において、後続
車輌のヘツドライト光がルームミラーに反射し、
運転者の目を眩惑させる。それを防止するため液
晶を充填し、必要に応じて明暗が切り換えられる
液晶ミラーがある（特開昭58−14119号参照）。同
ネガタイプの液晶ミラーは、例えば、夜間になる
と液晶駆動回路に直流電源を印加しておき、後続
車輌からのヘツドライト光が運転者に眩惑を与え
るものでなければ、昼間と同様の明るいルームミ
ラーとして作動するが、後続車輌からのヘツドラ
イト光が反射し、運転者の目を眩惑させるような
場合、スイツチ操作によつて液晶駆動回路に対す
る電源供給を解除し、その液晶ミラーを暗（防
眩）状態として運転者の眩しさをおさえ、後方の
安全確認ができるようにしてある。
Vehicle rearview mirrors reflect the headlights of the following vehicle on the rearview mirror at night, etc.
dazzle the driver's eyes. To prevent this, there is a liquid crystal mirror that is filled with liquid crystal and whose brightness can be switched as needed (see Japanese Patent Laid-Open No. 14119/1983). For example, the same negative type LCD mirror can be used as a bright rearview mirror at night, as long as DC power is applied to the LCD drive circuit and the headlights from the following vehicle do not dazzle the driver. However, if headlight light from a following vehicle is reflected and dazzles the driver's eyes, the power supply to the LCD drive circuit is canceled by operating a switch, and the LCD mirror is placed in a dark (anti-glare) state. This reduces glare for the driver and allows the driver to check the safety of the rear.
第３図は従来のこの種の液晶ミラーの駆動電源
回路を示したものである。 FIG. 3 shows a conventional driving power supply circuit for this type of liquid crystal mirror.
第３図において、１はバツテリー、２はそのバ
ツテリーと直列接続のヒユーズ、３は液晶ミラー
駆動回路、４は液晶ミラー、５はラジオ、ルーム
ランプ等、複数台が並列接続された他の電気機器
である。 In Fig. 3, 1 is a battery, 2 is a fuse connected in series with the battery, 3 is a liquid crystal mirror drive circuit, 4 is a liquid crystal mirror, and 5 is other electric equipment connected in parallel, such as a radio, a room lamp, etc. It is.
同回路構成によると、バツテリー１よりの電源
はヒユーズ２を介して複数台の電気機器５と並列
接続された液晶駆動回路３に供給され、液晶ミラ
ー４に電源印加され、昼間と同様の明るい反射ミ
ラーとして作用するが、後続車輌のヘツドライト
光が運転者に眩しさを与えると、液晶ミラー４へ
の電源供給を遮断する。 According to the same circuit configuration, power from a battery 1 is supplied via a fuse 2 to a liquid crystal drive circuit 3 connected in parallel with a plurality of electrical devices 5, and power is applied to a liquid crystal mirror 4, which reflects a bright light similar to that seen during daytime. It functions as a mirror, but if the headlights of a following vehicle dazzle the driver, the power supply to the liquid crystal mirror 4 is cut off.
ところが、同液晶ミラー駆動電源（バツテリ
ー）は、ラジオやルームランプ等、他の電気機器
５の電源と共通であるため、電気機器５の一部が
過負荷等で電源回路に挿入してあるヒユーズ２が
溶断した場合、液晶ミラーの電源印加が遮断され
「暗」状態となる。従つて運転者は後方確認がし
にくくなり、ミラーとしての機能を失うという問
題があつた。 However, since the LCD mirror drive power supply (battery) is the same as the power supply for other electrical devices 5 such as radios and room lamps, some of the electrical devices 5 may be overloaded due to fuses inserted in the power circuit. 2 is fused, the power supply to the liquid crystal mirror is cut off, resulting in a "dark" state. Therefore, there was a problem in that it became difficult for the driver to check the rear view, and the mirror lost its function as a mirror.
本発明は、前記した従来技術の問題点に鑑みな
されたものであつて、電源回路のヒユーズが溶断
し、電源供給が断れた場合であつても液晶ミラー
の駆動回路への電源供給は補償し、正常なミラー
機能を果たすことができるできるようにした液晶
ミラーの駆動電源回路を提供することを目的とす
る。
The present invention was made in view of the problems of the prior art described above, and even if the fuse in the power supply circuit blows and the power supply is cut off, the power supply to the liquid crystal mirror drive circuit is compensated. An object of the present invention is to provide a driving power supply circuit for a liquid crystal mirror that can perform a normal mirror function.
本発明の特徴は、液晶ミラーを駆動する液晶駆
動回路と、ラジオ、ルームランプ等の複数の電気
機器に対して電源供給するための主電源回路と、
該主電源回路系に故障が発生した場合、該主電源
回路に代わつて液晶ミラーの駆動回路に電源供給
する副電源回路を設けると共に、前記主電源回路
と副電源回路を自動的に切り換える切換回路を設
け、主電源がダウンした場合でも液晶ミラーを
「明」状態で使用できるようにした点である。
The features of the present invention include: a liquid crystal drive circuit that drives a liquid crystal mirror; a main power circuit that supplies power to multiple electrical devices such as a radio and a room lamp;
If a failure occurs in the main power circuit system, a sub power circuit is provided to supply power to the liquid crystal mirror drive circuit in place of the main power circuit, and a switching circuit automatically switches between the main power circuit and the sub power circuit. The main feature is that the LCD mirror can be used in a "bright" state even if the main power supply goes down.
以下、第１図および第２図に従つて本発明の実
施例を詳述する。第１図はその一実施例を示すも
のであつて、第３図と同一符号を付してあるもの
は同一機能を有するものである。第１図において
は主電源回路を構成するヒユーズ６と副電源回路
を構成するヒユーズ７がバツテリーに対して並列
接続してあつて、両ヒユーズ６，７はリレー接点
ａおよびｂを介して液晶駆動回路５の入力電圧端
子の一方と接続してある。ｃはコモン接点であ
る。８は主電源回路用のヒユーズ６を介して接続
された電源切換用のリレーコイルで、前記リレー
接点ａ，ｂを切り換えるためのものである。９は
インジケータである。
Embodiments of the present invention will be described in detail below with reference to FIGS. 1 and 2. FIG. 1 shows one embodiment of the present invention, and the same reference numerals as those in FIG. 3 have the same functions. In Fig. 1, fuse 6 constituting the main power circuit and fuse 7 constituting the auxiliary power circuit are connected in parallel to the battery, and both fuses 6 and 7 drive the liquid crystal via relay contacts a and b. It is connected to one of the input voltage terminals of the circuit 5. c is a common contact. Reference numeral 8 denotes a power supply switching relay coil connected via a fuse 6 for the main power circuit, and is used to switch the relay contacts a and b. 9 is an indicator.
第１図の回路構成によると、通常はバツテリー
１→ヒユーズ６→リレー接点ａ，ｃを介し、液晶
駆動回路３に直流電源が供給され、液晶ミラー４
を駆動（明るい状態）する。いま、何らかの原因
によりヒユーズ６を介して形成された主電源回路
系、例えばラジオ回路が電源シヨートなどで、ヒ
ユーズ６が溶断した場合、リレーコイル８の電源
が断たれ、リレー接点はｂ側に切り換わる。それ
によつてラジオ回路等の他の電気機器５並びにイ
ンジケータ９への電源は断たれるが、液晶駆動回
路３へはヒユーズ７、並びに接点ｂ，ｃを介して
供給され、正常なネガタイプの液晶ミラーとして
機能する。 According to the circuit configuration shown in FIG. 1, DC power is normally supplied to the liquid crystal drive circuit 3 via the battery 1 → fuse 6 → relay contacts a and c, and the liquid crystal mirror 4
(bright state). Now, if the fuse 6 blows out due to some reason in the main power circuit system formed through the fuse 6, such as a radio circuit, the power supply to the relay coil 8 is cut off, and the relay contact is switched to the b side. Change. As a result, power is cut off to other electrical equipment 5 such as a radio circuit and the indicator 9, but power is supplied to the liquid crystal drive circuit 3 via the fuse 7 and contacts b and c, and the normal negative type liquid crystal mirror is supplied. functions as
しかも、インジケータ９は消灯するので運転者
は主電源回路のヒユーズ６が溶断したことを知
り、現在はヒユーズ７を介した副電源回路によつ
て液晶駆動回路が駆動していることが確認でき
る。 Moreover, since the indicator 9 goes out, the driver knows that the fuse 6 of the main power circuit has blown, and can confirm that the liquid crystal drive circuit is currently being driven by the sub power circuit via the fuse 7.
第２図は本発明の第２の実施例を説明するため
の回路図であつて、前記した実施例においては副
電源回路をヒユーズとリレー接点により構成し、
バツテリーは主電源回路と共用した場合の例であ
るが、本実施例は、主電源回路用のバツテリー１
とは別に副電源回路用のバツテリー１０を設け、
主電源用のヒユーズ６が溶断した際にリレーコイ
ル８の印加電源を遮断し、リレー接点をａからｂ
に切り換えることによつて副電源回路用のバツテ
リー１０より液晶駆動回路３に電源供給するよう
に構成したものである。これによつて正常なネガ
タイプの液晶ミラーとして機能するものである。
また、インジケータ９の消灯によつてヒユーズ６
が溶断したことを確認できることは前述と同様で
ある。 FIG. 2 is a circuit diagram for explaining a second embodiment of the present invention, and in the embodiment described above, the sub power supply circuit is composed of a fuse and a relay contact,
This is an example where the battery is shared with the main power circuit, but in this embodiment, the battery 1 for the main power circuit is
Separately, a battery 10 for the sub power supply circuit is provided,
When the main power fuse 6 blows, the power applied to the relay coil 8 is cut off and the relay contacts are changed from a to b.
By switching to , the battery 10 for the sub power supply circuit supplies power to the liquid crystal drive circuit 3. This allows it to function as a normal negative type liquid crystal mirror.
Also, when the indicator 9 goes out, the fuse 6
As mentioned above, it can be confirmed that the fuse has fused.
上述の実施例からも明らかなように本発明によ
れば、液晶ミラーの駆動回路と、ラジオ、ルーム
ランプ等の電気機器の電源と共通使用するための
主電源回路の他に、副電源回路並びに電源切換回
路を設け、主電源回路系に異常が発生した場合、
副電源回路に自動切り換えし、その副電源回路で
もつて液晶駆動回路に電源供給できるようにした
ものであるから、夜間等において主電源回路系に
異常が発生した場合でも、ネガタイプ液晶ミラー
を明状態に保つことが、後方確認が正確にできる
という利点がある。
As is clear from the above-mentioned embodiments, according to the present invention, in addition to the main power circuit for common use with the driving circuit of the liquid crystal mirror and the power supply of electrical equipment such as radios and room lamps, there are also sub-power circuits and A power supply switching circuit is installed, and if an abnormality occurs in the main power supply circuit system,
The system automatically switches to the sub power supply circuit, and the sub power supply circuit can also supply power to the LCD drive circuit, so even if an abnormality occurs in the main power supply circuit at night, the negative type LCD mirror remains in the bright state. This has the advantage that backward confirmation can be done accurately.
第１図、第２図は本発明の第１、第２の実施例
を示す駆動電源回路図である。第３図は従来のネ
ガタイプ液晶ミラーの駆動電源回路図である。
１……主電源用バツテリー、３……液晶駆動回
路、４……液晶ミラー、５……電気機器、６……
主電源用ヒユーズ、７……副電源用ヒユーズ、８
……リレーコイル、９……インジケータ、１０…
…副電源。
1 and 2 are driving power supply circuit diagrams showing first and second embodiments of the present invention. FIG. 3 is a drive power circuit diagram of a conventional negative type liquid crystal mirror. 1... Main power battery, 3... Liquid crystal drive circuit, 4... Liquid crystal mirror, 5... Electrical equipment, 6...
Main power supply fuse, 7... Sub-power supply fuse, 8
...Relay coil, 9...Indicator, 10...
...Sub-power supply.
Claims (1)
晶駆動回路と並列接続された、ラジオ、ルームミ
ラー等の複数の電気機器に対して電源供給するた
めの主電源回路と、該主電源回路に故障が発生し
た場合に、該主電源回路に代わつて液晶駆動回路
に電源供給する副電源回路を設けると共に、前記
液晶駆動回路に電源供給する主電源回路と副電源
回路を自動的に切り換えるための切換回路を具備
して成ることを特徴とする液晶ミラーの駆動電源
補償回路。1 A failure occurs in the liquid crystal drive circuit that drives the liquid crystal mirror, the main power circuit that supplies power to multiple electrical devices such as radios and room mirrors that are connected in parallel with the liquid crystal drive circuit, and the main power circuit. When this occurs, a sub power supply circuit is provided to supply power to the liquid crystal drive circuit in place of the main power supply circuit, and a switch is provided to automatically switch between the main power supply circuit and the sub power supply circuit that supply power to the liquid crystal drive circuit. A driving power supply compensation circuit for a liquid crystal mirror, comprising a circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59214378A JPS6194839A (en) | 1984-10-15 | 1984-10-15 | Driving power-source compensating circuit for liquid-crystal mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59214378A JPS6194839A (en) | 1984-10-15 | 1984-10-15 | Driving power-source compensating circuit for liquid-crystal mirror |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6194839A JPS6194839A (en) | 1986-05-13 |
| JPH0332493B2 true JPH0332493B2 (en) | 1991-05-13 |
Family
ID=16654791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59214378A Granted JPS6194839A (en) | 1984-10-15 | 1984-10-15 | Driving power-source compensating circuit for liquid-crystal mirror |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6194839A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63222953A (en) * | 1987-03-13 | 1988-09-16 | Furukawa Electric Co Ltd:The | Multiplex transmission system for vehicle |
| JPS63231044A (en) * | 1987-03-18 | 1988-09-27 | Hitachi Ltd | Power source device for vehicle |
| JP2661929B2 (en) * | 1987-12-28 | 1997-10-08 | アイシン・エィ・ダブリュ株式会社 | Fail-safe control device for electronically controlled automatic transmission |
| JP2695316B2 (en) * | 1991-08-30 | 1997-12-24 | 矢崎総業株式会社 | Vehicle power line structure |
| JPH0558508U (en) * | 1992-01-16 | 1993-08-03 | 株式会社カーメイト | Auxiliary power supply for vehicle electrical components |
| JPH0564007U (en) * | 1992-02-04 | 1993-08-24 | 日産ディーゼル工業株式会社 | Vehicle power supply |
| JP2009274500A (en) * | 2008-05-13 | 2009-11-26 | Quick Co Ltd | Vehicular lighting control device |
| JP5163632B2 (en) * | 2009-12-25 | 2013-03-13 | トヨタ自動車株式会社 | Light control glass |
-
1984
- 1984-10-15 JP JP59214378A patent/JPS6194839A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6194839A (en) | 1986-05-13 |
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