Abstract:
According to the present invention, a rearview mirror comprises a first substrate having a front surface and a rear surface, a reflective coating disposed on a surface of the first substrate, and an electronic circuit component secured to the rear surface of the first sub;>trate. The mirror element may be an electrochromic mirror element comprising a transparent second substrate positioned in front of the first substrate. The electronic component secured to the rear surface may be a component of a drive circuit for the electrochromic mirror element. The rearview mirror element may further comprise electrically conductive tracings provided on the rear surface of the first substrate electrically coupled to the electrical component. The tracings may be used to electrically couple the drive circuit to the electrodes of the electrochromic mirror element. The tracings may be deposited on the rear surface using numerous methods including inkjet printing techniques.
Abstract:
An automotive balanced microphone system (300) includes a microphone (303) located in a vehicle mirror (301) connected in a balanced configuration for eliminating noise. A split resistor network (305) is used for supplying a supply voltage to the balanced microphone (303). The split resistor network (305) allows the microphone (303) to be easily powered while noise induced into the supply lines can easily cancelled at the microphone output for use with an electronic device (309).
Abstract:
A rearview assembly (10) includes a mounting structure (154) for attaching to a vehicle. The mounting structure (154) includes a housing (30) that has a rearview element (40) disposed inside for providing a driver of the vehicle with a view to the rear of the vehicle. The rearview assembly (10) also includes a continuously variable slope delta encoder module (11) in or on the mounting structure (154) configured to generate a feedback signal. The rearview assembly (10) also includes a pre-processing module (12) on or within the mounting structure (154). The pre-processing module (12) is configured to process a source signal and the feedback signal from the continuously variable slope delta encoder module (11), and to provide a pre processed signal to the continuously variable slope delta encoder module (11) based on the value of the source signal and the feedback signal.
Abstract:
An autobias vehicular microphone system (300) includes a microphone (301) which uses an amplifier (306) for amplifying an output of the microphone. A first feedback path (308) provides an amplifier output signal to the amplifier input for providing amplifier linearity, and a second feedback path (305) is used for providing bias to a voltage reference (303). The voltage reference (303) operates to provide an autobias to the amplifier (306) based upon amplifier load-ing. By holding the bias point to a constant voltage, a constant clip level can be maintained depending on varying load conditions of electronic devices (307, 309, 311) using the microphone (301). Additionally, one or more switches can be used to vary the bias point which can be interpreted to control functionality of the electronic devices (307, 309, 311).
Abstract:
A control system for one or more electrochromic elements used in an outside electrochromic (OEC) mirror used in automobiles or other vehicular applications, to control the glare of both IEC elements used as a rearview mirror (20) as well as the OEC elements (24, 26) used as sideview mirrors (24, 26). An ambient light senor (129) and glare sensor (133) operate to determine a glare level used to control both IEC and OEC electrochromic elements. The drive circuits for the OEC's elements may be controlled so as to account for various factors such as tinted glass characteristics in the vehicle.
Abstract:
An interior rearview mirror assembly (101) for a vehicle includes a mirror housing (106) adapted for attachment to the interior of the vehicle, the mirror housing (106) including a back surface (107) generally facing the front of the vehicle and an opening generally facing the rear of the vehicle. A mirror (108) is disposed in the opening of the mirror housing (106) where a first microphone assembly (108a), second microphone assembly (108b), and third microphones assembly (108c) are positioned in the mirror housing (106) along its rear, bottom, or top surface. Each of the three microphone assemblies (108a, 108b 108c) are arranged in a substantially triangular configuration for reducing unwanted sound in the vehicle from at least one direction. The microphone assemblies may operate using a delay-and-sum beam-former (403, 405) and digital signal processor (DSP) (407) for enhancing the directivity of the microphone array within the vehicle.
Abstract:
A rearview assembly for a vehicle including a mounting structure for mounting to a vehicle, a rearward viewing device, and housing with a position sensor, is provided. The position sensor includes first and second radiation emitters, a radiation reception element, and sensor processing circuitry coupled to one of the position sensors and the radiation reception element. The position sensor determines the position of an object in the vicinity of the rearward viewing device.
Abstract:
According to one embodiment of the present invention, a power supply circuit (10) is provided for selectively supplying power to a vehicle accessory (20). The power supply circuit may be comprised of a switch (30) coupled to a power line from the vehicle battery (15) and to a power input of the accessory (20), and a control circuit (50) coupled to the switch (30). The control circuit (50) may monitor the battery voltage and selectively supply power from the battery (15) to the accessory (20) in response to the battery voltage. The control circuit (50) may supply power from the battery (15) to the accessory (20) when the battery voltage changes at least a predetermined amount over a time period. The control circuit (50) may comprise a microprocessor that adaptively learns signatures in the battery voltage occurring when the engine is running in order to provide power from the battery (15) to the accessory (20) as if the power were supplied from the ignition.
Abstract:
A rearview assembly (10) includes a mounting structure (636) and a tri-band antenna module (650). The mounting structure is adapted for mounting to a conductive mounting button (656) that is attached to an inside surface of a vehicle windshield (620). The tri-band antenna module is mounted adjacent the conductive mounting button and includes a patch antenna (692) and a dual-band cellular antenna (691).