Vehicle image capture system
First Claim
1. An automatic rearview mirror system for an automotive vehicle comprising:
- at least one variable reflectance rearview mirror;
an array of sensing elements to sense light levels in an area rearward of said at least one variable reflectance rearview mirror, each of said sensing elements adapted to sense light levels of light incident thereon and to output an electrical signal indicative of said sensed light levels;
a signal processor, connected to said array of sensing elements, receiving and using the electrical signals indicative of the sensed light levels from said sensing elements to determine a first electrical signal indicative of a background light level in the area rearward of said at least one variable reflectance rearview mirror and to determine a second electrical signal indicative of at least one peak light level in the area rearward of said at least one variable reflectance rearview mirror, wherein said signal processor determines at least one control signal indicative of the desired reflectance level of the at least one variable reflectance rearview mirror from the first electrical signal indicative of the background light level and the second electrical signal indicative of the at least one peak light level; and
at least one drive circuit connected to said signal processor and to said at least one variable reflectance rearview mirror for receiving said at least one control signal and generating and applying at least one drive signal to said at least one variable reflectance rearview mirror to drive said at least one variable reflectance mirror to the desired reflectance level.
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Accused Products
Abstract
A system apparatus, means and method for controlling a plurality of variable reflectance mirrors (or mirror segments), including a rearview mirror and side view mirrors, which change their reflectance level in response to a plurality of drive voltages applied thereto, for controlling the vehicle lighting system and for monitoring a vehicle interior for an automotive vehicle. The system includes a light sensing device and a control circuit formed as a single VLSI CMOS circuit. The light sensing device comprises a photosensor array having a field of view encompassing a vehicle interior. The logic and control circuit determines a background light signal from photosensor element signals generated by the photosensor elements in the photosensor array indicative of light levels incident on the photosensor elements. The circuit also determines a peak light signal in three different zones or sub-arrays of the photosensor array. The zones or sub-arrays may correspond to three mirrors or mirror segments. The peak light signals in each of the zones and a common background light signal are used to determine independent and separate control signals, which are then output to separate mirror drive circuits for independently controlling the reflectance level of the rearview mirror and the left and right side view mirrors, or alternatively the segments of a mirror. The logic and control circuit uses the background light signal to control the vehicle lighting system. The logic and control circuit also determines a vehicle intrusion condition if there is movement within the vehicle in a vehicle intrusion detection mode of the vehicle interior monitoring system. The logic and control circuit also stores image data in memory in the compartment image data storage mode of the vehicle interior monitoring system.
98 Citations
92 Claims
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1. An automatic rearview mirror system for an automotive vehicle comprising:
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at least one variable reflectance rearview mirror;
an array of sensing elements to sense light levels in an area rearward of said at least one variable reflectance rearview mirror, each of said sensing elements adapted to sense light levels of light incident thereon and to output an electrical signal indicative of said sensed light levels;
a signal processor, connected to said array of sensing elements, receiving and using the electrical signals indicative of the sensed light levels from said sensing elements to determine a first electrical signal indicative of a background light level in the area rearward of said at least one variable reflectance rearview mirror and to determine a second electrical signal indicative of at least one peak light level in the area rearward of said at least one variable reflectance rearview mirror, wherein said signal processor determines at least one control signal indicative of the desired reflectance level of the at least one variable reflectance rearview mirror from the first electrical signal indicative of the background light level and the second electrical signal indicative of the at least one peak light level; and
at least one drive circuit connected to said signal processor and to said at least one variable reflectance rearview mirror for receiving said at least one control signal and generating and applying at least one drive signal to said at least one variable reflectance rearview mirror to drive said at least one variable reflectance mirror to the desired reflectance level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. A control system for controlling a plurality of variable reflectance mirrors, each of which change their reflectance level in response to a drive signal from an associated drive circuit, for an automotive vehicle, comprising:
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a plurality of variable reflectance mirrors;
a photosensor array mountable to face substantially towards a rear area, wherein said photosensor array comprises a plurality of photosensor element sets, each set comprising a plurality of photosensor elements, each of said photosensor elements generating a photosensor element signal indicative of a light level of light incident thereon, and each of the sets corresponding to one of said plurality of variable reflectance mirrors, a control circuit, connected to said photosensor array, for determining and applying a plurality of control signals, each of the control signals indicative of a desired reflectance level for each of said plurality of variable reflectance mirrors in response to receiving the photosensor element signals from each of the plurality of photosensor element sets, a plurality of drive circuits connected to said control circuit and to different ones of said plurality of variable reflectance mirrors associated therewith, wherein each of the control signals is output to said drive circuit associated therewith, to generate and apply a drive signal to each of said plurality of variable reflectance mirrors causing each of said mirrors to assume a reflectance level. - View Dependent Claims (47, 48, 49)
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50. A control system for controlling at least one variable reflectance mirror for an automotive vehicle, comprising:
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photosensor array means for sensing light levels in an area rearward of said at least one variable reflectance mirror and generating photosensor array signals, means for determining a background light signal from the photosensor array signals;
means for determining a peak light signal from the photosensor array signals; and
means for controlling a reflectance level of the at least one variable reflectance mirror using the background and peak light signals. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
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76. A method of controlling the reflectance of at least one variable reflectance mirror comprising the steps of:
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sensing light levels in an area rearward of the at least one variable reflectance mirror with an array of sensing elements;
determining a background light level from the sensed light levels;
determining a peak light level from the sensed light levels; and
controlling a reflectance level of the at least one variable reflectance mirror using the determined background and peak light levels. - View Dependent Claims (77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87)
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88. A control system for monitoring a vehicle interior and for controlling at least one variable reflectance mirror for an automotive vehicle, comprising:
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photosensor array means for sensing light levels in an area rearward of said photosensor array means and generating at least a first set of photosensor array signals;
first determining means coupled to said photosensor array means for receiving said at least a first set of photosensor array signals-and determining from at least a portion of said at least a first set of photosensor array signals a first signal for controlling said at least one variable reflectance mirror;
second determining means coupled to said photosensor array means for receiving said at least a first set of photosensor array signals and determining at least a first set of values indicative of said at least a portion of said at least a first set of photosensor array signals; and
memory means coupled to said second determining means for receiving and storing said at least a portion of said at least a first set of photosensor array signals.
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89. A vehicle intrusion detection system for detecting movement within a vehicle interior for an automotive vehicle, comprising:
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photosensor array means for sensing light levels in an area including at least a portion of a vehicle interior and generating at least a first set and a second set of photosensor array signals;
determining means coupled to said photosensor array means for receiving said at least a first set and a second set of photosensor array signals and determining at least a first set and a second set of values indicative of said at least a first set and a second set of photosensor array signals; and
comparing means coupled to said determining means for receiving said at least a first set and a second set of values indicative of said at least a first set and a second set of photosensor array signals and comparing said at least a first set and a second set of values to generate at least one output control signal indicative of the correlation between said at least a first set and a second set of values.
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90. A compartment image data storage system for an automotive vehicle, comprising:
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photosensor array means for sensing light levels in at least a portion of a vehicle compartment and generating at least a first set of photosensor array signals;
determining means coupled to said photosensor array means for receiving said at least a first set of photosensor array signals and determining at least a first set of values indicative of said at least a first set of photosensor array signals; and
memory means coupled to said determining means for receiving and storing said at least a first set of values indicative of said at least a first set of photosensor array signals.
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91. An automatic rearview mirror system for an automotive vehicle comprising:
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a variable reflectance rearview mirror,;
a photosensor array means for sensing light levels in an area rearward of said variable reflectance rearview mirror and for generating photosensor array signals;
a signal processing means for receiving said photosensor array signals and for determining from said photosensor array signals a signal for controlling said variable reflectance rearview mirror; and
a mounting bracket means for attaching said variable reflectance rearview mirror to said automotive vehicle, said mounting bracket means further comprising a housing means for housing said photosensor array means and said signal processing means.
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92. A vehicle lighting control system for controlling a vehicle lighting system in an automotive vehicle comprising:
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a photosensor array means for sensing light levels in a forward field of view and generating a set of photosensor array signals; and
a signal processing means coupled to said photosensor array means for receiving said set of photosensor array signals and determining from said set of photosensor array signals at least one control signal for controlling said vehicle lighting system.
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Specification