JPS6194839A - Driving power-source compensating circuit for liquid-crystal mirror - Google Patents
Driving power-source compensating circuit for liquid-crystal mirrorInfo
- Publication number
- JPS6194839A JPS6194839A JP59214378A JP21437884A JPS6194839A JP S6194839 A JPS6194839 A JP S6194839A JP 59214378 A JP59214378 A JP 59214378A JP 21437884 A JP21437884 A JP 21437884A JP S6194839 A JPS6194839 A JP S6194839A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- liquid crystal
- mirror
- power
- liquid
- 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.)
- Granted
Links
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)
Abstract
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ｔ１ｇ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 t1g circuit system of a negative type liquid crystal mirror breaks down at night, etc., the power supply circuit of the liquid crystal mirror is 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、後続車輌のへ
７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５
８−１４１１９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、後続車輌からのへ７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、後続車輌からのへノドライト
光が反射し、運転者の目を眩惑させるような場合、スイ
ッチ操作によっ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■ダ）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であ
る。In a vehicle rearview mirror, at night or the like, the light from a following vehicle is reflected on the rearview mirror, dazzling the driver's eyes. To prevent this, there is a liquid crystal mirror that is filled with liquid crystal and can be switched between bright and dark as necessary (Japanese Patent Laid-Open No. 5
8-14119), the same negative type liquid crystal mirror can be used, for example, by applying DC power to the liquid crystal drive circuit at night, so that the light from the following vehicle does not dazzle the driver. operates as a bright rear-view mirror in the same way as during the day, but if the henodolite light from the 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 The mirrors are kept in a dark (defective) state to reduce glare for the driver and allow him 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”Ｃ，ｌはバッテリー、２はそのハノテリ
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 Figure 3, C and l are batteries, 2 is a fuse connected in series with the battery, 3 is a liquid crystal mirror drive circuit, and 4
5 is a liquid crystal mirror, and 5 is other electrical equipment such as a radio, a room lamp, etc., which are connected in parallel.
同回路構成によると、バフテリーｌよりのｔｆｉ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
続車輌のヘッ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, TFI from the buffer 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 in the daytime. It acts as a mirror, but if the headlights of the 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（バッテリー）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
入しであるヒユーズ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。従って運転者は後
方確認がしにくくなり、ミラーとしての機能を失うとい
う問題があった。However, since the liquid crystal mirror drive power source (battery) is the same as the power source for other electrical devices 5 such as radios and room lamps, some of the electrical devices 5 may be overloaded and a fuse may be inserted into 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
のであって、電源回路のヒユーズが溶断し、電源供給が
断れた場合であっ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Ｑ回路を提供すること
を目的とする。The present invention has been 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 Q 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、咳主ｉｓ回路に代わって液晶ミラーの
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, and a case where a failure occurs in the main power circuit system. In place of the main IS circuit, a sub power supply circuit is provided to supply power to the LCD mirror drive circuit, and a switching circuit is provided to automatically switch between the main power supply circuit and the sub power supply circuit, so that even if the main power supply goes down, the liquid crystal display Mirror
The point is that it can be used in the "light" state.
以下、第１図および第２図に従っ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って、第
３図と同一符号を付しで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がバフテリー
に対して並列接続してあって、両ヒエーズ６４．７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である。Ｃはコモン接点である。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 those having the same reference numerals as those in FIG. 3 have the same functions. In FIG. 1, fuse 6, which constitutes the main power circuit, and fuse 7, which constitutes the auxiliary power circuit, are connected in parallel to the battery, and both fuses 64.7 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.
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。Reference numeral 8 denotes a power 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、通常はパンテリーｌ−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ンヨー
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
によっ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、並びに接点す、 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 through the pantry l-fuse 6-relay contacts a and c to drive 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 via the fuse 6, such as a radio circuit, the relay coil 8
The power is cut off and the relay contact switches to the b side. As a result, power is cut off to other electrical equipment 5 such as the radio circuit and the indicator 9, but power is supplied to the liquid crystal drive circuit 3 via the fuse 7 and contacts 3 and 3, and the power is supplied to the liquid crystal drive circuit 3 as a normal negative type liquid crystal mirror. Function.
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っ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め実施例を説明するための回路図
であって、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、バッテリーは主電源回
路と共用した場合の例であるが、本実施例は、主ｔｉｆ
［回路用のバッテリーｌとは別に副電源回路用のバッテ
リーｌＯ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って副電源回路用のバッテリ
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。これによっ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
の消灯によってヒユーズ６が溶断したことを確認できる
ことはｉｎ述と同様である。FIG. 2 is a circuit diagram for explaining a second embodiment of the present invention. In the embodiment described above, the sub power supply circuit is composed of fuses and relay contacts, and the battery is shared with the main power supply circuit. However, in this embodiment, the main tif
[By providing a battery lO for the auxiliary power supply circuit separately from the battery l for the circuit, and cutting off the power applied to the relay coil 8 when the fuse 6 for the main power supply melts, and switching the relay contact from a to b. The configuration is such that power is supplied to the liquid crystal drive circuit 3 from a battery 10 for the auxiliary power supply circuit. This allows it to function as a normal negative type liquid crystal mirror. Also, indicator 9
As in the above, it can be confirmed that the fuse 6 has blown by turning off the light.
上述の実施例からも明らかなように本発明によれＣ，ｔ
′、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っ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 embodiments, according to the present invention, C, t
', In addition to the main power circuit for common use with the drive circuit for the LCD mirror and the power supply for electrical equipment such as radios and room lamps, a sub power circuit and a power switching circuit are installed to prevent abnormalities from occurring in the main power circuit system. If an abnormality occurs in the main power circuit system, such as at night, the negative type LCD mirror can be used automatically. There is an advantage that keeping it in a bright state allows for accurate rear confirmation.
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図は従来のふガタイブ液晶ミ
ラーの駆動電源回路図である。
ｌ−主電源用バッテリー、３ 液晶駆動回路、４一液晶
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、１〇−副電源。FIGS. 1 and 2 show the first embodiment of the present invention. FIG. 7 is a drive power supply circuit diagram showing a second embodiment. FIG. 3 is a drive power circuit diagram of a conventional fugitive type liquid crystal mirror. l-Battery for main power supply, 3-LCD drive circuit, 4-LCD mirror, 5-Electrical equipment, 6-Fuse for main power supply, 7...
- Fuse for sub power supply, 8 - Relay coil, 9 - Indicator, 10 - Sub power supply.
Claims (1)
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
っ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
。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. a switching circuit for automatically switching between the main power supply circuit and the sub power supply circuit for supplying power to the liquid crystal drive circuit; and a switching circuit for automatically switching between the main power supply circuit and the sub power supply circuit for supplying power to the liquid crystal drive circuit; A drive power supply compensation circuit for a liquid crystal mirror, comprising:
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 true JPS6194839A (en) | 1986-05-13 |
| JPH0332493B2 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) |
Cited By (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 |
| JPH01172044A (en) * | 1987-12-28 | 1989-07-06 | Aisin Aw Co Ltd | Fail-safe controlling device for electronically controlled automatic transmission |
| JPH0558231A (en) * | 1991-08-30 | 1993-03-09 | Yazaki Corp | Electric power source line structure for vehicle |
| 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 |
| JP2011137873A (en) * | 2009-12-25 | 2011-07-14 | Toyota Motor Corp | Light control glass |
-
1984
- 1984-10-15 JP JP59214378A patent/JPS6194839A/en active Granted
Cited By (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 |
| JPH01172044A (en) * | 1987-12-28 | 1989-07-06 | Aisin Aw Co Ltd | Fail-safe controlling device for electronically controlled automatic transmission |
| JPH0558231A (en) * | 1991-08-30 | 1993-03-09 | Yazaki Corp | Electric power source line structure for vehicle |
| 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 |
| JP2011137873A (en) * | 2009-12-25 | 2011-07-14 | Toyota Motor Corp | Light control glass |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0332493B2 (en) | 1991-05-13 |
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