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    • 1. 发明授权
    • MULTI-FUNCTION LIGHT SENSOR FOR VEHICLE
    • 多FINCH TION光传感器,车辆
    • EP0910525B1
    • 2001-07-04
    • EP98921198.2
    • 1998-05-13
    • Hegyi, Dennis J.
    • Hegyi, Dennis J.
    • B60S1/08
    • B60S1/0822B60S1/0818B60S1/0833B60S1/0888Y10S15/15Y10S318/02
    • A system for detecting the presence of rain droplets on a windshield employs a source of radiant energy, such as an LED (70), and a photodetector installed on the instrument panel of a vehicle. The LED (70) and the photodiode (85) are arranged with respect to one another such that light from the LED (70) cannot reflect directly off the windshield (81) onto the photodiode (85). Only when the light from the LED is back scattered by an environmental condition, such as the raindrops on the exterior (82) of the windshield, the condensation of moisture on the interior (80) of the windshield, or the presence of smoke in the cabin, will the photodiode receive the light from the LED. Each of these environmental conditions has a predeterminable characteristic signature that permits the processing of data to detect same. An ambient light signal is subtracted from the combination of the rain and ambient light signals by pulsed operation of the LED and subtracting the ambient light signal, which is detected when the LED is dark, from the combined LED and ambient light signal which is present when the LED is illuminated. A further LED (100) is provided to effect a fog detection system that detects condensation on the interior of the vehicle windshield. The further LED (100) illuminates the photodiode in a manner whereby the light on the photodiode is reduced when condensation is present. Also, a monitoring arrangement that employs a separate light sensor provides compensation for variances resulting from component aging and thermal influences.
    • 2. 发明公开
    • MULTI-FONCTION LIGHT SENSOR FOR VEHICLE
    • MULTIFUNKTIONALER LICHTSENSOR FUER EIN FAHRZEUG
    • EP0698261A4
    • 1996-07-03
    • EP94916048
    • 1994-05-06
    • HEGYI DENNIS J
    • HEGYI DENNIS J
    • B60S1/08G08B21/00
    • B60S1/0818B60S1/0833Y10S15/15Y10S318/02
    • A system for detecting the presence of rain droplets on a windshield (17) employs a source of light, such as an LED (11), and a photodetector (12) installed on the dashboard (13) of a vehicle. The LED (11) and the photodiode (12) are arranged with respect to one another such that light from the LED (11) cannot reflect directly off the windshield into the photodiode (12). Only when the light from the LED is backscattered by an environmental condition, such as the raindrops (25) on the exterior of the windshield (17), the condensation of moisture on the interior of the windshield (17), or the presence of smoke in the cabin, will the photodiode (12) receive the light from the LED (11). Each of these environmental conditions has a predeterminable characteristic signature which permits the processing of data to detect same. An ambient light signal is subtracted from the combination of the rain and ambient light signals by pulsed operation of the LED (11) and subtracting the ambient light signal, which is detected when the LED (11) is dark, from the combined LED (11) and ambient light signal which is present when the LED (11) is illuminated.
    • 用于检测挡风玻璃上雨滴的存在的系统使用诸如LED的光源和安装在车辆仪表板上的光电检测器。 LED和光电二极管相对于彼此布置,使得来自LED的光不能直接从挡风玻璃反射到光电二极管中。 只有当来自LED的光被环境条件(例如挡风玻璃外部的雨滴)反射,挡风玻璃内部的水分冷凝或者舱内存在烟雾时,光电二极管将接收 来自LED的光。 这些环境条件中的每一个具有允许数据处理检测相同的可预定的特征签名。 通过LED的脉冲操作从雨和环境光信号的组合中减去环境光信号,并从LED组合的LED和环境光信号中减去当LED较暗时检测到的环境光信号, LED亮起。
    • 4. 发明公开
    • SYSTEM FOR DETERMINING THE DIRECTION OF INCIDENT OPTICAL RADIATION
    • 系统以避免光辐射事件的测向。
    • EP0596982A1
    • 1994-05-18
    • EP92916493.0
    • 1992-06-30
    • HEGYI, Dennis J.
    • HEGYI, Dennis J.
    • G01S3
    • G01J1/02G01J1/0266G01J1/04G01J1/0403G01J1/0437G01J1/4228G01S3/784
    • Un agencement de photodétecteurs produit un signal électrique sensible à la position d'une source de lumière en utilisant un masque (15) situé à une hauteur prédéterminée au-dessus d'une pluralité de photodétecteurs (D1,1), (D1,2), (D2,1), (D2,2), de telle façon que, à mesure que le soleil se déplace par rapport à l'appareil, une ombre, sensible à la position du soleil, est projetée. Un appareil, fabriqué conformément à l'invention, comporte une pluralité de photodétecteurs, chacun présentant une surface respective pratiquement plane photosensible permettant de recevoir la lumière du soleil sur un éventail de positions prédéterminé. Dans un mode de réalisation préféré où l'on recherche la compacité, les surfaces planes photosensibles sont disposées de manière sensiblement coplanaire les unes par rapport aux autres. Le masque à lumière possédant des sections opaques (16) et transparentes (17) est disposé de façon à recouvrir les surfaces pratiquement planes photosensibles afin de déterminer la caractéristique de sensibilité à la position de l'appareil. Dans certains modes de réalisation, un diffuseur est interposé entre le masque à lumière et les photodétecteurs. Les caractéristiques de réponse de l'appareil peut être déterminée par analyse géométrique, ou de manière empirique en utilisant des valeurs qui peuvent être conservées dans une table à consulter.
    • 5. 发明公开
    • Photodetector system with controllable position-dependent sensitivity
    • Photodetektorsystem mit beeinflussbarerpositionsabhängigerEmpfindlichkeit。
    • EP0350866A1
    • 1990-01-17
    • EP89112665.8
    • 1989-07-11
    • Hegyi, Dennis J.
    • Hegyi, Dennis J.
    • G01J1/06H01L31/10
    • B60H1/0075G01J1/06G01S3/783G01S3/787
    • A photodetector system (10) for producing electrical signals responsive to the orientation of a light source, such as the sun, with respect thereto utilizes in certain embodiments a diffuser (11) to eliminate position-dependent sensitivities of the photo­cathode. The extent to which the diffuser (11) or the photocathode itself is exposed to the incident radiation can be controlled by a shroud (12) or by applying an absorptive coating (32) in a predetermined pattern on an absorber cap (40), or on the diffuser (11) directly. In a shrouded embodiment of the invention, the diffuser element (11) is arranged within a mountable body (13) with the shroud (12) extending thereover. The shroud (12), by its configuration and its height above the photodetector, defines the range of angles of elevation and azimuth at which the diffuser (11) can be illuminated. Such angles can also be controlled with printed or sprayed-on markings (30) on the diffuser or absorber cover (11) which form an opaque coating so as to prevent light transmission over predetermined regions. In addition to transmissive and nontransmissive regions, a fine dot pattern (32) may be applied to the diffuser or the absorber cover (11), which may be translucent or transparent, or to the diffuser (11) directly, so that only partial transmission of the light can be achieved therethrough. The absorber cover (11) may be provided with a light absorbing coloration or dye therethrough, and have a predetermined variation in thickness, so that the amount of light transmitted therethrough is responsive to the thickness at the point of incidence of the light. Thus, the light which is transmitted to the photodetector is modulated in response to the orientation of the light source with respect to the photodetector system.
    • 用于产生响应于诸如太阳的光源的取向的电信号的光电检测器系统(10)在某些实施例中利用扩散器(11)来消除光电阴极的位置相关灵敏度。 漫射器(11)或光电阴极本身暴露于入射辐射的程度可以通过护罩(12)来控制,或者通过在吸收帽(40)上以预定图案施加吸收涂层(32),或 在扩散器(11)上直接。 在本发明的被覆盖的实施例中,漫射器元件(11)布置在可安装的主体(13)内,护罩(12)在其上延伸。 护罩(12)通过其结构及其高度在光电检测器上方的高度来限定扩散器(11)可被照亮的仰角和方位角的范围。 这样的角度也可以通过形成不透明涂层的扩散器或吸收器盖(11)上的印刷或喷涂标记(30)来控制,以防止在预定区域上的光传输。 除了透射和非透射区域之外,可以将细点图案(32)直接施加到扩散器或吸收器盖(11),其可以是半透明的或透明的,或者直接施加到扩散器(11),使得仅部分透射 的光可以实现。 吸收器盖(11)可以设置有通过其的吸光着色或染料,并且具有预定的厚度变化,使得透过其的光量响应于光入射点处的厚度。 因此,响应于光源相对于光电检测器系统的取向而调制传输到光电检测器的光。
    • 6. 发明公开
    • MULTI-FUNCTION LIGHT SENSOR FOR VEHICLE
    • 多FINCH TION光传感器,车辆
    • EP0910525A1
    • 1999-04-28
    • EP98921198.0
    • 1998-05-13
    • Hegyi, Dennis J.
    • Hegyi, Dennis J.
    • B60S1
    • B60S1/0822B60S1/0818B60S1/0833B60S1/0888Y10S15/15Y10S318/02
    • A system for detecting the presence of rain droplets on a windshield employs a source of radiant energy, such as an LED (70), and a photodetector installed on the instrument panel of a vehicle. The LED (70) and the photodiode (85) are arranged with respect to one another such that light from the LED (70) cannot reflect directly off the windshield (81) onto the photodiode (85). Only when the light from the LED is back scattered by an environmental condition, such as the raindrops on the exterior (82) of the windshield, the condensation of moisture on the interior (80) of the windshield, or the presence of smoke in the cabin, will the photodiode receive the light from the LED. Each of these environmental conditions has a predeterminable characteristic signature that permits the processing of data to detect same. An ambient light signal is subtracted from the combination of the rain and ambient light signals by pulsed operation of the LED and subtracting the ambient light signal, which is detected when the LED is dark, from the combined LED and ambient light signal which is present when the LED is illuminated. A further LED (100) is provided to effect a fog detection system that detects condensation on the interior of the vehicle windshield. The further LED (100) illuminates the photodiode in a manner whereby the light on the photodiode is reduced when condensation is present. Also, a monitoring arrangement that employs a separate light sensor provides compensation for variances resulting from component aging and thermal influences.