JPS6223843A - Sightability assisting device for vehicle - Google Patents
Sightability assisting device for vehicleInfo
- Publication number
- JPS6223843A JPS6223843A JP60162965A JP16296585A JPS6223843A JP S6223843 A JPS6223843 A JP S6223843A JP 60162965 A JP60162965 A JP 60162965A JP 16296585 A JP16296585 A JP 16296585A JP S6223843 A JPS6223843 A JP S6223843A
- Authority
- JP
- Japan
- Prior art keywords
- light
- filter
- vehicle
- specific wavelength
- incident
- 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
Landscapes
- Closed-Circuit Television Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、車両乗員の視野内の対象物が視認し酸い状況
となった場合、その視認性を補う装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for supplementing visibility when an object within the visual field of a vehicle occupant becomes difficult to see.
従来、一般に暗所での場景をテレビカメラ等の撮像装置
によって撮ろうとする場合、その映像を明確なものとす
るため、当該撮像装置は低照度撮影可能な特に感度の高
いものを利用している。Conventionally, when attempting to capture a scene in a dark place using an imaging device such as a television camera, in order to obtain a clear image, the imaging device has a particularly high sensitivity and is capable of capturing images in low light. .
このような技術は、車両において、乗員（特に運転者）
の視野内の対象物が視認し難い状況となった場合、その
視認性を補う装置（以下、車両用視認補助装置という）
に利用することができる。即ち、車両が暗所走行を行っ
て、乗員にとって車両前方が見にくい場合、その見にく
い領域の場景を上記高感度撮像装置によって撮り、この
撮った像を車重内に設けた表示装置に映し出すようにす
るのである。このような車両除外物等が表示装置に映し
出されるようになるため、この表示装置の映像によって
当該見にくい領域の視認性が補えるようになる。Such technology is used in vehicles to protect occupants (especially drivers).
A device that supplements visibility when objects within the field of view become difficult to see (hereinafter referred to as vehicle visibility aid device)
It can be used for. That is, when the vehicle is driving in a dark place and it is difficult for the occupants to see the front of the vehicle, the scene in the difficult-to-see area is photographed by the high-sensitivity imaging device, and this photographed image is displayed on a display device installed inside the vehicle. That's what I do. Since such objects excluded from the vehicle are displayed on the display device, the visibility of the difficult-to-see area can be supplemented by the image on the display device.
ところで、対向車のヘッドライト光のような強い光（以
下、味感光という）により乗員が眩惑され、その結果、
眩惑光の近傍領域が視認し難い状況となった場合、上述
したような車両用視認補助装置では、その機能を発揮１
７得ないという問題がある。By the way, the occupants are dazzled by strong light such as the headlights of an oncoming vehicle (hereinafter referred to as "sensitivity light"), and as a result,
When it becomes difficult to see the area near the dazzling light, the vehicle visibility aid device as described above does not perform its function 1.
There is a problem with not getting 7.
それは、上記車両用視認補助装置が高感度撮像装置を備
えて、光量の少ない状況において本来の機能を発揮しう
るよりにしているためであり、上記眩惑光のような強い
光が背景光となる場合には、撮像装置に対する当該背景
光の光量が多すぎて、本来撮らなければならない対象物
からの光の量にかかわらず、当該撮像装置が露出過多の
状態になるからである。そのため、光示装置の画面はハ
レーションをきたすことになる。This is because the above-mentioned vehicle visibility aid device is equipped with a high-sensitivity imaging device to enable it to perform its original function in low-light situations, and strong light such as the above-mentioned dazzling light becomes background light. This is because in some cases, the amount of background light to the imaging device is too large, causing the imaging device to be overexposed, regardless of the amount of light from the object that should be photographed. This causes halation on the screen of the optical display device.
そこで、本発明の課題は撮像装置に対する対象物からの
光の量を減少させることなく、眩惑光等の背景光の光景
のみを減少させる点にある。Therefore, an object of the present invention is to reduce only the background light scene such as dazzling light without reducing the amount of light from the object to the imaging device.
上記課題を解決するための技術的手段は、特定波長帯域
の光を車両から所定方向に照射する光照射装置と、この
光照射装置に」：って照射される領域の場景を撮る撮像
装置と、撮像装置で撮った像を映し出す表示装置とを有
すると共に、上記撮像装置の光入射面前部に上記光照射
装置からの光の波長帯域を少なくとも含む特定波長帯域
の透過特性を有するフィルタ装置を配置するようにした
ものである。Technical means for solving the above problems include a light irradiation device that irradiates light in a specific wavelength band from a vehicle in a predetermined direction, and an imaging device that captures the scene of the area irradiated by the light irradiation device. , a display device that displays an image taken by the imaging device, and a filter device having a transmission characteristic of a specific wavelength band including at least the wavelength band of the light from the light irradiation device is disposed in front of the light incident surface of the imaging device. It was designed to do so.
対向車のヘンドライド光等の眩惑光によって１東の乗員
が眩惑され、眩惑光の近傍領域が見えに〈〈なった場合
、この眩惑光は、フィルタ装置を介して撮像装置に入射
する。即ち、眩惑光はフィルタ装置によって当該特定波
長帯域以外の波長帯域光が遮断され、その分光蓋が減少
した状態で撮像装置における撮像面に達する。When the occupant in the first direction is dazzled by dazzling light such as the driver's light of an oncoming vehicle and the area in the vicinity of the dazzling light becomes invisible, this dazzling light enters the imaging device via the filter device. That is, the dazzling light reaches the imaging surface of the imaging device in a state where wavelength band light other than the specific wavelength band is blocked by the filter device and the spectral cover is reduced.
一方、光照射装置によって上記光に〈〈なった領域に対
して光を照射すると、当該領域にある対象物で反射した
光照射装置からの光はフィルタ装置をそのまま透過して
撮像装置における撮像面に達する。On the other hand, when the light irradiation device irradiates light onto the region that has become the above-mentioned light, the light from the light irradiation device that is reflected by the object in the region passes through the filter device as it is and passes through the imaging surface of the imaging device. reach.
従って、撮像面において背景光に対して対象物からの光
を強調させることができ、表示装置に当該見えにくくな
った領域内の対象物を映し出すことができるようになる
。Therefore, the light from the object can be emphasized with respect to the background light on the imaging surface, and the object in the area that is difficult to see can be displayed on the display device.
以下、本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第１図は本発明に係る車両用視認補助装置の構成例を示
す図である。同図において、１社光源ランプ、２は特定
波長帯域の透過特性を有するフィルタであシ、この光源
ランプ１及びフィルタ２によって光照射装置１０を構成
している。FIG. 1 is a diagram showing an example of the configuration of a vehicle visibility assisting device according to the present invention. In the figure, the light source lamp 1 and the filter 2 are filters having transmission characteristics in a specific wavelength band, and the light source lamp 1 and the filter 2 constitute a light irradiation device 10.
この光照射装置１０は、具体的には例えば第２図に示す
ように前照灯に並列して設けた補助灯のレンズ前面に当
該フィルタ２を装着することによって構成される。また
、３は例えばＣＣＤ（固体撮像素子）を利用してなる撮
像装置であり、この撮像装置３の光入射面前部、即ちレ
ンズ３ａの前部に上記光照射装置１０におけるフィルタ
２と同様の透過特性を有するフィルタ４が配置されてい
る。上記撮像装置３は例えば第２図に示すように車両ル
ーフ上に設置され、フィルタ４も同様に撮像装置３のレ
ンズ３ａ前面のルーフ−ヒに設置されている。５は車室
内に設置されるＣＲＴディスプレイ等の表示装置であり
、この表示装置５には撮像装置３によって撮られた場景
が映し出されるようになっている。ここで、撮像装置３
に用いられるＣＯＤの感度特性が例えば第３図に示すよ
うなものである場合、フィルタ２及び４の透過特性は、
ＣＣＩ）の感度特性のピークに対応した狭波長帯域のも
の、例えば第４図に示すように１．０μｍ を中心とし
た波長帯域にするのが効率的である（勿論第３図から０
．６μｍを中心とした波長帯域でも良い）。Specifically, this light irradiation device 10 is constructed, for example, by attaching the filter 2 to the front surface of a lens of an auxiliary light provided in parallel with a headlamp, as shown in FIG. Further, 3 is an imaging device using, for example, a CCD (solid-state image sensor), and the front part of the light incident surface of this imaging device 3, that is, the front part of the lens 3a, transmits light similar to the filter 2 in the light irradiation device 10. A filter 4 having characteristics is arranged. The imaging device 3 is installed, for example, on the roof of a vehicle as shown in FIG. 2, and the filter 4 is similarly installed on the roof in front of the lens 3a of the imaging device 3. Reference numeral 5 denotes a display device such as a CRT display installed in the vehicle interior, and the scene photographed by the imaging device 3 is displayed on the display device 5. Here, the imaging device 3
For example, if the sensitivity characteristics of the COD used in the filter are as shown in FIG.
It is efficient to use a narrow wavelength band corresponding to the peak of the sensitivity characteristics of CCI), for example, a wavelength band centered around 1.0 μm as shown in Figure 4 (of course, from Figure 3,
．． (A wavelength band centered around 6 μm may also be used.)
このように、フィルタ２及び４の透過特性を設定すれば
、光照射装置１０から照射される光Ｌａの波長帯域は１
．０μｍ を中心としたものとなる一方、外光Ｌｂが撮
像装置１３に入射する際実際ＣＣＤに達する光はやはり
１．０μｍケ中心とした波長帯域の光となる。In this way, if the transmission characteristics of the filters 2 and 4 are set, the wavelength band of the light La irradiated from the light irradiation device 10 is 1.
．． On the other hand, when the external light Lb is incident on the imaging device 13, the light that actually reaches the CCD is light in a wavelength band centered on 1.0 μm.
今、上記のような車両用視認補助装置を搭載した車両の
乗員が対向車のヘンドライド光によって眩惑され、この
光近傍が見にくくなった場合を想定する。対向車のヘッ
ドライト光はフィルタ４を介して撮像装置３に入射する
。この時、当該入射光はフィルタ４０作用により、当該
特定波長帯域（１，０μｍを中心とする狭波長帯域）の
光のみとなる。よって、撮像装置３内のＣＣＤに達する
光の量は実際のヘッドライト光の光量よ抄かなり減衰し
たものとなる。また一方、光照射装置１０によって上記
見えにくい領域に当該特定波長帯域の光を照射すると、
その領域内に存在する対象物での反射光もまたフィルタ
４を介して撮像装置３に入射する。この時、上記反射光
自体が当該特定波長帯域の光となっていることから、当
該反射光はフィルタ４をそのまま透過する。Now, let us assume that the occupant of a vehicle equipped with the above-mentioned vehicle visibility aid device is dazzled by the headlights of an oncoming vehicle, making it difficult to see near the light. Headlight light from an oncoming vehicle enters the imaging device 3 via the filter 4. At this time, the incident light becomes only light in the specific wavelength band (narrow wavelength band centered around 1.0 μm) due to the action of the filter 40. Therefore, the amount of light reaching the CCD in the imaging device 3 is considerably attenuated compared to the actual amount of headlight light. On the other hand, when the light irradiation device 10 irradiates the hard-to-see region with light in the specific wavelength band,
Reflected light from objects existing within that area also enters the imaging device 3 via the filter 4 . At this time, since the reflected light itself is light in the specific wavelength band, the reflected light passes through the filter 4 as it is.
従って、上記のように撮像装置３に入射する光によって
得られる像を表示装置５に映し出せば、対向車のヘンド
ライド光による背景光のみが減衰されているので、その
映像はハレーションの無い当該対象物に相当した映像と
なる。これにより、乗員は本来、眩惑によって見にくく
なった対象物を表示装置５の映像を見ることによって視
認することができるようになる。Therefore, if the image obtained by the light incident on the imaging device 3 is displayed on the display device 5 as described above, only the background light due to the hend light of the oncoming vehicle is attenuated, so the image will be of the object without halation. It becomes an image that corresponds to an object. This allows the occupant to visually recognize objects that would otherwise be difficult to see due to dazzle by viewing the image on the display device 5.
第５図は本発明に係る車両用視認補助装置の他の構成例
金示す図である。この例は対向車のヘンドライド光等の
眩惑光のみを更に減衰させるようにしたものである。FIG. 5 is a diagram showing another example of the configuration of the vehicle visual recognition aid device according to the present invention. In this example, only the dazzling light such as the driver's light of an oncoming vehicle is further attenuated.
即ち、光源ランプ１とフィルタ２で構成された光照射装
置１０の前面にＰＬＺＴ等で構成した光シャンタロを配
置すると共に、撮像装置３の前面に設けたフィルタ４の
更に前面に曲射光シャッタ６と同様の構成となる光シャ
ッタ１を配置した構成としている。そして、駆動回路８
が上記光シャッタ６．７を同期させてオン（透過）、オ
フ（遮断）駆動している。That is, a light beam shutter made of PLZT or the like is placed in front of a light irradiation device 10 made up of a light source lamp 1 and a filter 2, and a curved light shutter 6 is placed further in front of a filter 4 provided in front of an imaging device 3. The configuration is such that an optical shutter 1 having a similar configuration is arranged. And the drive circuit 8
The optical shutters 6.7 are turned on (transmission) and off (blocking) in synchronization with each other.
め、光シャンタロによって断続光となる光照射装＃１０
からの光は光シャッタ７をそのまま透過し、更にフィル
タ４をそのまま透過して撮像装置３に入射する一方、対
向車のヘッドライト光等の眩惑光は光シヤツク１によっ
て断続光となって更に上記実施例同様フィルタ４の作用
により減衰されて撮像装置３に入射する。このため、光
照射装置１０の光量補正を行なっておけば、光照射装置
１０からの光（断続光）によって照射された対象物での
反射光は前述した実施例と同様の光量にて撮像装置３の
ＣＣＤに達する一方、眩惑光は光シャンタフのオン・オ
フのデユーティ−比に応じて更に減衰されて当該ＣＣＩ
）に達する。Light irradiation device #10 which becomes intermittent light by optical chantaro
The light from the camera passes through the light shutter 7 as it is, and then passes through the filter 4 as it is and enters the imaging device 3. On the other hand, the dazzling light such as the light from the headlights of an oncoming vehicle is turned into intermittent light by the light shank 1, and then further transmitted through the filter 4 as described above. As in the embodiment, the light is attenuated by the action of the filter 4 and enters the imaging device 3. Therefore, if the light intensity of the light irradiation device 10 is corrected, the light reflected from the object irradiated with the light (intermittent light) from the light irradiation device 10 will be reflected by the imaging device at the same light intensity as in the above-described embodiment. 3 CCD, the dazzling light is further attenuated according to the on/off duty ratio of the optical shunt, and the dazzling light is
).
従って、本実施例によれば、撮像装置３に入射する眩惑
光のみを更に減衰させることが可能となシ、表示装置５
に映し出される映像は、光照射装置１０によって照し出
される対象物が更に明確なものとなる。Therefore, according to this embodiment, it is possible to further attenuate only the dazzling light incident on the imaging device 3, and the display device 5
In the image displayed, the object illuminated by the light irradiation device 10 becomes clearer.
尚、この第５図に示す実施例では、対向車が同様の視認
補助装置を搭載している場合、仮シに当該対向車の光照
射装置からの光によって眩惑を受けるような場合があっ
たとしても、その断続周期を検出し、自単における光シ
ャンタロ及びγのオン・オフ周期を上記断続周期からず
らすことによって、当該対向車の光照射装置からの光を
減衰させて撮像装置ｉ１３ Ｖこ入射させることが可能
となる。In addition, in the embodiment shown in FIG. 5, if the oncoming vehicle is equipped with a similar visibility aid device, the temporary vehicle may be dazzled by the light from the oncoming vehicle's light irradiation device. However, by detecting the intermittent period and shifting the on/off period of the light shunt and γ in the vehicle from the above-mentioned intermittent period, the light from the light irradiation device of the oncoming vehicle is attenuated and the image pickup device i13 V is It becomes possible to make it incident.
また尚、上記各実施例において光照射装置１０は光源ラ
ンプ１とフィルタ２によって構成するようにしたが、ナ
トリウムランプやレーザー光源等の単色光光源にて構成
するように１７ても良い。但Ｌ２、この場合フィルタ４
の透過特性は少なくとも当該単色光が透過できるものと
しなければならない。Further, in each of the above embodiments, the light irradiation device 10 is composed of the light source lamp 1 and the filter 2, but the light irradiation device 17 may be composed of a monochromatic light source such as a sodium lamp or a laser light source. However, L2, in this case filter 4
The transmission characteristics of the material must be such that at least the monochromatic light concerned can be transmitted therethrough.
以上説明してきたように、本発明によれば、光照射装置
によって照らし出された対象物からの反射光の光量を減
少させることなく、眩惑光光の背景光のみを減少させて
撮像装置に入射させることが可能となる。そのため、対
向車のへンドライト光等によって眩惑されて見に〈〈な
った領域の場景を光示装置に明確に映し出すことができ
るようになり、より安全走行に寄与し得る車両用視認補
助装置が実現できる。As described above, according to the present invention, only the background light of the dazzling light is reduced without reducing the amount of reflected light from the object illuminated by the light irradiation device and enters the imaging device. It becomes possible to do so. Therefore, it is now possible to clearly display the scene in the area that is blinded by the headlights of an oncoming vehicle, etc. on the display device, and this is a vehicle visibility aid device that can contribute to safer driving. realizable.
４、 しｌ ｒＩ＋ｉ ＣＤ簡’Ｉ ｈ ｔ＋Ｑ 明第
１図は本発明に係る車両用視認補助装置の構成例を示す
図、第２図は第１図に示す構成装置の設′置例を示す図
、第３図＃′ｉ撮像装置に用いらＪ］るＣ ＣＤの感度
特性を示す図、第４図はフィルタの透過特性を示す図、
第５図は本発明に係る車両用視認補助装置の他の構成例
金示す図である。4. Shil rI+i CD Simple'I h t+Q Bright FIG. 1 shows an example of the configuration of the vehicle visibility aid device according to the present invention, and FIG. 2 shows an example of the installation of the component device shown in FIG. 1. Figure 3 is a diagram showing the sensitivity characteristics of the CCD used in the imaging device; Figure 4 is a diagram showing the transmission characteristics of the filter;
FIG. 5 is a diagram showing another example of the configuration of the vehicle visual recognition aid device according to the present invention.
Claims (1)
装置と、この光照射装置によつて照射される領域の場景
を撮る撮像装置と、撮像装置で撮つた像を映し出す表示
装置とを有すると共に、上記撮像装置の光入射面前部に
上記光照射装置からの光の波長帯域を少なくとも含む特
定波長帯域の透過特性を有するフィルタ装置を配置した
ことを特徴とする車両用視認補助装置。It has a light irradiation device that irradiates light in a specific wavelength band from a vehicle in a predetermined direction, an imaging device that takes a scene of an area irradiated by the light irradiation device, and a display device that displays an image taken by the imaging device. A visibility aiding device for a vehicle, further comprising a filter device having transmission characteristics in a specific wavelength band including at least a wavelength band of light from the light irradiation device, disposed in front of a light incident surface of the imaging device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60162965A JPS6223843A (en) | 1985-07-25 | 1985-07-25 | Sightability assisting device for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60162965A JPS6223843A (en) | 1985-07-25 | 1985-07-25 | Sightability assisting device for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6223843A true JPS6223843A (en) | 1987-01-31 |
Family
ID=15764642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60162965A Pending JPS6223843A (en) | 1985-07-25 | 1985-07-25 | Sightability assisting device for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6223843A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63192788U (en) * | 1987-05-29 | 1988-12-12 | ||
| US7301466B2 (en) | 2003-04-09 | 2007-11-27 | Toyota Jidosha Kabushiki Kaisha | Turn signal lamp, periphery monitoring device, body construction and imaging device for vehicle |
-
1985
- 1985-07-25 JP JP60162965A patent/JPS6223843A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63192788U (en) * | 1987-05-29 | 1988-12-12 | ||
| JPH0541087Y2 (en) * | 1987-05-29 | 1993-10-18 | ||
| US7301466B2 (en) | 2003-04-09 | 2007-11-27 | Toyota Jidosha Kabushiki Kaisha | Turn signal lamp, periphery monitoring device, body construction and imaging device for vehicle |
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