JPS61105245A - Car head light automatic switching device - Google Patents

Car head light automatic switching device

Info

Publication number
JPS61105245A
JPS61105245A JP59225519A JP22551984A JPS61105245A JP S61105245 A JPS61105245 A JP S61105245A JP 59225519 A JP59225519 A JP 59225519A JP 22551984 A JP22551984 A JP 22551984A JP S61105245 A JPS61105245 A JP S61105245A
Authority
JP
Japan
Prior art keywords
light
headlight
receiving section
light receiving
receiver
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
Application number
JP59225519A
Other languages
Japanese (ja)
Inventor
Akishi Numata
沼田　晃志
Muneaki Matsumoto
宗昭 松本
Shigeyuki Akita
秋田　成行
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Soken Inc
Original Assignee
Nippon Soken Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Soken Inc filed Critical Nippon Soken Inc
Priority to JP59225519A priority Critical patent/JPS61105245A/en
Publication of JPS61105245A publication Critical patent/JPS61105245A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • B60Q1/1415—Dimming circuits
    • B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/40—Indexing codes relating to other road users or special conditions
    • B60Q2300/41—Indexing codes relating to other road users or special conditions preceding vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/40—Indexing codes relating to other road users or special conditions
    • B60Q2300/42—Indexing codes relating to other road users or special conditions oncoming vehicle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

PURPOSE:To improve the controllability by detecting effectively a light from the front which is either a head light from a car running in the opposite direc tion or a tail light from a car running ahead so as to allow a head light to be automatically switched over to the low beam side. CONSTITUTION:NO.2 light receiver 10 is adapted where the receiver is composed of a condensing lens 11, a low bus optical fiber 12 which cuts off the long wave length of more than, e.g. 580nm, and of light receiving element 13 which is sensitive to the wave length, e.g. from 400-600nm. In addition, NO.1 light receiver 20 is also adapted, NO.1 receiver is composed of a condensing lens 21 and of a light receiving element 22 which is sensitive to the wave length, e.g. from 400-1,100nm. The output from NO.2 receiver 10 is inputted into a voltage comparator 70 by way of a voltage amplifier 30, a voltage comparator 40, and a variable gain voltage amplifier 60. And the output from NO.1 receiver 20 is also inputted into the voltage comparator 70 by way of a voltage amplifier 50 and a variable gain voltage amplifier 60. And when the output from the voltage comparator 70 represents a 1, a switching relay 80 is allowed to be turned on permitting a head light to be changed over to a low beam.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はヘッドライトを自動的にハイビーム側、ロービ
ーム側に切替える車両用ヘッドライト自動切替装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic headlight switching device for a vehicle that automatically switches headlights between a high beam side and a low beam side.

〔従来の技術〕[Conventional technology]

従来、車両前方の光量、すなわち対向車からのヘッドラ
イト光を検出してヘッドライトをハイビーム側からロー
ビーム側に切替えるものがある。Conventionally, there is a system that detects the amount of light in front of the vehicle, that is, the headlight light from an oncoming vehicle, and switches the headlights from the high beam side to the low beam side.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら、このものは対向車からのヘッドライト光
に対してのみ、ヘッドライトの自動切替を行なうもので
あるため、前走車が存在する場合には手動で切替を行わ
なければならなかった。However, since this system automatically switches the headlights only in response to headlight light from an oncoming vehicle, it was necessary to switch the headlights manually if there was a vehicle in front.

本発明は上記問題に鑑みたもので、対向車からのヘッド
ライト光以外に前走車のテールライト光をも検出してヘ
ッドライトの自動切替を行なうようにしたものである。The present invention has been developed in view of the above problem, and is designed to automatically switch the headlights by detecting not only headlight light from an oncoming vehicle but also tail light light from a vehicle in front.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は上記技術的課題を達成するため、車両前方の光
量を検出して検出信号を発生する第１の受光部と、この
第１の受光部からの検出信号が所定レベルを越えている
か否かの比較作動を行なう比較手段と、この比較手段に
て前記検出信号が所定レベルを越えていることを判定す
ると、ヘッドライトをハイビーム側からロービーム側に
切替える切替手段とを備えた車両用へ・ノドライト自動
切替装置において、 対向車からのヘッドライト光と前走車からのテールライ
ト光を区別して受光する第２の受光部と、この第２の受
光部の受光状態に応じて前記比較手段の比較作動に対し
て補正を加える補正手段とを備えたことを特徴としてい
る。In order to achieve the above-mentioned technical problem, the present invention includes a first light receiving section that detects the amount of light in front of the vehicle and generates a detection signal, and a detection signal that detects whether the detection signal from the first light receiving section exceeds a predetermined level. For vehicles equipped with a comparison means that performs the above comparison operation, and a switching means that switches the headlights from the high beam side to the low beam side when the comparison means determines that the detection signal exceeds a predetermined level. The automatic nodal light switching device includes a second light receiving section that distinguishes and receives headlight light from an oncoming vehicle and taillight light from a vehicle in front; The present invention is characterized by comprising a correction means for correcting the comparison operation.

〔発明の効果〕〔Effect of the invention〕

本発明は上記のように構成しているから、車両前方から
の光が対向車のヘッドライト光であっても前走車のテー
ルライト光であってもそれを検出し、ヘッドライトの自
動切替を適切に行なうことができるという優れた効果が
ある。Since the present invention is configured as described above, the light from the front of the vehicle is detected whether it is the headlight light of an oncoming vehicle or the taillight light of a vehicle in front, and automatically switches the headlights. It has the excellent effect of being able to carry out the process appropriately.

〔実施例〕〔Example〕

以下本発明を図に示す実施例について説明する。 The present invention will be described below with reference to embodiments shown in the drawings.

第１図は本発明の一実施例を示す構成図である。FIG. 1 is a block diagram showing an embodiment of the present invention.

この第１図において、１０は第２の受光部で、集光レン
ズ１１と、波長５８０顛以上の長波長域をカットするロ
ーパス光学フィルタ１２と、第２図（ａｌに示すように
波長４００〜６００　ｎｍ付近に感度を持つ受光素子（
Ｃｄｓ）１３より構成される。In FIG. 1, reference numeral 10 denotes a second light receiving section, which includes a condensing lens 11, a low-pass optical filter 12 that cuts long wavelengths of 580 wavelengths or more, and a low-pass optical filter 12 that cuts wavelengths of 400 to 580 wavelengths or more as shown in FIG. A photodetector with sensitivity around 600 nm (
Cds) 13.

２０は第１の受光部で、集光レンズ２１と、第２図（ｂ
）に示すように波長４００〜１ｌ１００ｎ付近に感度を
持つ受光素子（Ｓｉフォトダイオード）より構成される
。20 is a first light receiving section, which includes a condensing lens 21 and a
), it is composed of a light-receiving element (Si photodiode) having sensitivity around wavelengths of 400 to 1l100n.

３０は電圧増幅器、４０は電圧比較器、５０は電圧増幅
器、６０は電圧比較器４０の信号により利得を変化する
可変利得電圧増幅器、７０は電圧比較器、８０はヘッド
ライトをハイビーム側、ロービーム側に切替えるヘッド
ライト切替リレーである。なお、電圧比較器４０と可変
利得電圧増幅器６０にて前記電圧比較器７０の比較作動
に対して補正を加える補正手段を構成している。30 is a voltage amplifier, 40 is a voltage comparator, 50 is a voltage amplifier, 60 is a variable gain voltage amplifier whose gain is changed depending on the signal from the voltage comparator 40, 70 is a voltage comparator, 80 is a headlight for high beam side and low beam side This is a headlight switching relay that switches to The voltage comparator 40 and the variable gain voltage amplifier 60 constitute a correction means for correcting the comparison operation of the voltage comparator 70.

上記構成において、その作動を説明する。The operation of the above configuration will be explained.

第２の受光部１０に入った光は、レンズ１１で集光され
、ローパス光学フィルタ１２で５８０ｎｍ以上の長波長
域をカットした後、受光素子１３で光電変換され、光の
強さに比例した信号を出力する。ここで、ヘッドライト
とテールライトの分光特性は、それぞれ第２図（Ｃ１，
（ｄ）に示すようになり、テールライトには５８０ｎｍ
以下の波長成分はほとんどない。また、受光素子１３（
Ｃｄｓ）の分光感度特性は第２図（ａ）であり、５８０
ｎｍ以下の光を光電変化する。従って、第２の受光部１
０はヘッドライトの光だけを検知することができる。The light entering the second light receiving section 10 is focused by a lens 11, and after cutting off the long wavelength range of 580 nm or more by a low-pass optical filter 12, it is photoelectrically converted by a light receiving element 13, and is converted into a light that is proportional to the intensity of the light. Output a signal. Here, the spectral characteristics of headlights and taillights are shown in Figure 2 (C1,
As shown in (d), the tail light has 580 nm.
There are almost no wavelength components below. In addition, the light receiving element 13 (
The spectral sensitivity characteristics of Cds) are shown in Figure 2(a), and 580
Photoelectrically converts light of nm or less. Therefore, the second light receiving section 1
0 can only detect headlight light.

一方、第１の受光部２０に入った光は、レンズ２１で集
光され、受光素子２２で光電変換され、光の強さに比例
した信号を出力する。受光素子２２（Ｓｉフォトダイオ
ード）の分光感度特性は、第２図（ｂｌであり、第２図
（Ｃ１，（ｄｌの分光特性を持つヘッドライトとテール
ライト両方の光を効率よく光電変換する。On the other hand, the light entering the first light receiving section 20 is focused by the lens 21, photoelectrically converted by the light receiving element 22, and outputs a signal proportional to the intensity of the light. The spectral sensitivity characteristics of the light receiving element 22 (Si photodiode) are shown in FIG. 2 (bl), and it efficiently photoelectrically converts both the light from the headlights and the taillights, which have the spectral characteristics shown in FIG. 2 (C1, (dl).

第２の受光部１０からの出力信号は電圧増幅器３０で増
幅された後、電圧比較器４０で基準電圧Ｖｒｌと比較さ
れ、基準電圧ＶｒＩ以上の場合は“１″を、基準電圧Ｖ
ｒ１以下の場合は“０”信号を出力する。この信号は、
可変利得電圧増幅器６０の利得可変制御端子に入力され
る。The output signal from the second light receiving section 10 is amplified by the voltage amplifier 30, and then compared with the reference voltage Vrl by the voltage comparator 40.
If it is less than r1, a "0" signal is output. This signal is
It is input to the variable gain control terminal of the variable gain voltage amplifier 60.

一方、第１の受光部２０からの出力信号は電圧増幅器５
０で増幅された後、可変利得電圧増幅器６０で増幅され
る。可変利得電圧増幅器６０の利得は、前記利得可変制
御端子の入力信号が“０”の場合は大きく、“１”の場
合は小さく制御される。この利得比は、同−躍離でのヘ
ッドライトとテールライトの光Ｑに等しく設定する。本
実施例では利得比２０としている。従って可変利得電圧
増幅器６０の出力信号は、同一距離でのヘッドライトと
テールライトの光に対し、等しくなる。On the other hand, the output signal from the first light receiving section 20 is transmitted to the voltage amplifier 5.
After being amplified by 0, it is amplified by a variable gain voltage amplifier 60. The gain of the variable gain voltage amplifier 60 is controlled to be large when the input signal to the variable gain control terminal is "0" and small when it is "1". This gain ratio is set to be equal to the light Q of the headlight and taillight at the same distance. In this embodiment, the gain ratio is set to 20. Therefore, the output signal of variable gain voltage amplifier 60 will be equal for headlight and taillight light at the same distance.

可変利得電圧増幅器６０の出力信号は、電圧比較器７０
で、基準電圧Ｖｒ２と比較され、基準電圧Ｖ　ｒ　２以
上の場合は、その出力が“１”になり、ヘッドライト切
替リレー８０を駆動し、ロービームにする。逆に、電圧
比較器７０の出力が“Ｏ”の時はヘッドライト切替リレ
ー８０によりヘッドライトをハイビーム側にする。The output signal of the variable gain voltage amplifier 60 is sent to a voltage comparator 70.
Then, it is compared with the reference voltage Vr2, and if the reference voltage Vr2 is higher than the reference voltage Vr2, the output becomes "1", and the headlight switching relay 80 is driven to set the low beam. Conversely, when the output of the voltage comparator 70 is "O", the headlight switching relay 80 switches the headlights to the high beam side.

なお、上記実施例では、受光素子１３としてＣｄｓを、
受光素子２２としてＳｉフィトダイオードを示したが、
受光素子１３には波長４００〜６ＱＱｎｍの範囲で、受
光素子２２には波長４００〜１ｌ１００ｎ以上の範囲で
効率よく光電変換できる素子を用いてもよい。In addition, in the above embodiment, Cds is used as the light receiving element 13.
Although a Si phytodiode is shown as the light receiving element 22,
The light receiving element 13 may be an element capable of efficient photoelectric conversion in the wavelength range of 400 to 6QQ nm, and the light receiving element 22 may be an element capable of efficient photoelectric conversion in the wavelength range of 400 to 11100 nm or more.

また、第１の受光部２０、第２の受光部１０にそれぞれ
集光レンズ１１．２１を持つものを示したが、１つの集
光レンズを共用して受光を行なうように構成してもよい
。Further, although the first light receiving section 20 and the second light receiving section 10 each have a condensing lens 11.21, it may be configured such that one condensing lens is used in common for light reception. .

さらに、可変利得電圧増幅器６０の利得比は、同一距離
でのヘッドライトとテールライトの光に対し、可変利得
電圧増幅器の出力が等しくなるよう設定したが、それぞ
れ異なる距離でヘッドライト切替ができるようにするた
め、出力比が適当な値となるよう利得比を設定してもよ
い。Further, the gain ratio of the variable gain voltage amplifier 60 is set so that the output of the variable gain voltage amplifier is equal for headlights and taillights at the same distance, but it is possible to switch the headlights at different distances. In order to achieve this, the gain ratio may be set so that the output ratio becomes an appropriate value.

また、ヘッドライトとテールライトの光量差を可変利得
電圧増幅器６０の利得比により変化させるものを示した
が、第３図に示すように、電圧比較器４０からの信号に
より基準電圧Ｖｒ２のレベルを変化（電圧比較器４０か
らの信号が“１”の時には大きいレベル、′０”の時に
は小さいレベルになるように変化）させるレベル切替回
路９０を設けて行なうようにしてもよい。Furthermore, although the difference in light intensity between the headlight and taillight is changed by the gain ratio of the variable gain voltage amplifier 60 is shown, as shown in FIG. This may be achieved by providing a level switching circuit 90 that changes the signal (changes so that the signal from the voltage comparator 40 is at a high level when it is "1" and is at a low level when it is '0').

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例を示す構成図、第２図は作動
説明に供する特性図、第３図は本発明の他の実施例を示
す部分構成図である。 １０・・・第２の受光部、２０・・・第１の受光部、４
０．７０・・・電圧比較器、６０・・・可変利得電圧増
幅器、８０・・・ヘッドライト切替リレー。FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a characteristic diagram for explaining the operation, and FIG. 3 is a partial block diagram showing another embodiment of the present invention. 10... Second light receiving section, 20... First light receiving section, 4
0.70... Voltage comparator, 60... Variable gain voltage amplifier, 80... Headlight switching relay.

Claims (4)

【特許請求の範囲】[Claims] （１）車両前方の光量を検出して検出信号を発生する第
１の受光部と、この第１の受光部からの検出信号が所定
レベルを越えているか否かの比較作動を行なう比較手段
と、この比較手段にて前記検出信号が所定レベルを越え
ていることを判定すると、ヘッドライトをハイビーム側
からロービーム側に切替える切替手段とを備えた車両用
ヘッドライト自動切替装置において、 対向車からのヘッドライト光と前走車からのテールライ
ト光を区別して受光する第２の受光部と、この第２の受
光部の受光状態に応じて前記比較手段の比較作動に対し
て補正を加える補正手段とを備えた車両用ヘッドライト
自動切替装置。(1) A first light receiving section that detects the amount of light in front of the vehicle and generates a detection signal, and a comparison means that performs a comparison operation to determine whether the detection signal from the first light receiving section exceeds a predetermined level. and a switching means for switching the headlights from a high beam side to a low beam side when the comparison means determines that the detection signal exceeds a predetermined level. a second light-receiving section that distinguishes and receives headlight light and taillight light from a vehicle in front; and a correction means that corrects the comparison operation of the comparison means according to the light-receiving state of the second light-receiving section. An automatic headlight switching device for vehicles equipped with （２）前記第２の受光部は、前記ヘッドライト光と前記
テールライト光のうち、それらの波長の相違から前記ヘ
ッドライト光のみを検出するものである特許請求の範囲
第１項記載の車両用ヘッドライト自動切替装置。(2) The vehicle according to claim 1, wherein the second light receiving section detects only the headlight light out of the headlight light and the taillight light due to a difference in wavelength between the headlight light and the taillight light. headlight automatic switching device. （３）前記補正手段は、前記第２の受光部にて受光した
ヘッドライト光の光量が所定レベルを越えているか否か
を判定する判定手段と、この判定手段の判定結果に応じ
て、前記第１の受光部から前記比較手段に至る検出信号
の増幅利得を変化させる可変利得増幅手段とからなる特
許請求の範囲第２項記載の車両用ヘッドライト自動切替
装置。(3) The correction means includes a determination means for determining whether the amount of headlight light received by the second light receiving section exceeds a predetermined level; 3. The automatic headlight switching device for a vehicle according to claim 2, further comprising variable gain amplification means for changing the amplification gain of the detection signal from the first light receiving section to the comparison means. （４）前記補正手段は、前記第２の受光部にて受光した
ヘッドライト光の光量が所定レベルを越えているか否か
を判定する判定手段と、この判定結果に応じて、前記比
較手段の比較作動に用いる前記所定レベルを変化させる
レベル変化手段とからなる特許請求の範囲第２項記載の
車両用ヘッドライト自動切替装置。(4) The correction means includes a determination means for determining whether the amount of headlight light received by the second light receiving section exceeds a predetermined level; 3. The automatic headlight switching device for a vehicle according to claim 2, further comprising level changing means for changing the predetermined level used for comparison operation.
JP59225519A 1984-10-25 1984-10-25 Car head light automatic switching device Pending JPS61105245A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59225519A JPS61105245A (en) 1984-10-25 1984-10-25 Car head light automatic switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59225519A JPS61105245A (en) 1984-10-25 1984-10-25 Car head light automatic switching device

Publications (1)

Publication Number Publication Date
JPS61105245A true JPS61105245A (en) 1986-05-23

Family

ID=16830578

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59225519A Pending JPS61105245A (en) 1984-10-25 1984-10-25 Car head light automatic switching device

Country Status (1)

Country Link
JP (1) JPS61105245A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997027077A1 (en) * 1996-01-28 1997-07-31 Thomas Meierl Automatic light switch
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