Method to optimize uniformity of head-up display image brightness
AssigneePanasonic Automotive Systems America, LLC.
InventorDAVID KAY LAMBERT
Life of this patent
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Abstract
A head up display system presents a virtual image to a human driver of a motor vehicle. A plurality of light emitting devices are substantially aligned in a row and each emits light. There is a direct relationship between an electrical current drawn by each individual light emitting device and a distance each individual light emitting device is disposed from a center of the row. At least one mirror reflects the light emitted by the light emitting devices toward a windshield of the motor vehicle such that the light is reflected by the windshield and is visible to the human driver as the virtual image.
Claims20
A head up display system for presenting a virtual image to a human driver of a motor vehicle, the system comprising:
- a plurality of light emitting devices dispersed in an arrangement and each configured to emit light, wherein there is a direct relationship between an electrical current drawn by each individual said light emitting device and a distance each individual said light emitting device is disposed from a center of the arrangement;
- and at least one mirror configured to reflect the light emitted by the light emitting devices toward a windshield of the motor vehicle such that the light is reflected by the windshield and is visible to the human driver as the virtual image.
A method for presenting a virtual image to a human driver of a motor vehicle, the method comprising:
- providing a plurality of light emitting devices substantially distributed in a configuration;
- drawing electrical current through each said light emitting device such that there is a direct relationship between the electrical current drawn by each individual said light emitting device and a distance each individual said light emitting device is disposed from a center of the configuration;
- emitting light from each said light emitting device during the step of drawing electrical current;
- and
- reflecting the light emitted by the light emitting devices toward a windshield of the motor vehicle such that the light is reflected by the windshield and is visible to the human driver as the virtual image.
A head up display system for presenting a virtual image to a human driver of a motor vehicle, the system comprising:
- a plurality of light emitting devices arranged in a layout and each configured to emit light, wherein there is an inverse relationship between a gap between each adjacent pair of the light emitting devices and a distance each said adjacent pair of light emitting devices is disposed from a center of the layout;
- and
- at least one mirror configured to reflect the light emitted by the light emitting devices toward a windshield of the motor vehicle such that the light is reflected by the windshield and is visible to the human driver as the virtual image.
Dependencies are inferred from the claim text.