SYSTEM AND METHOD FOR OPTIMIZING HEAD-UP DISPLAY UNIFORMITY
First Claim
1. A head-up display (HUD) system comprising:
- an imaging subsystem characterized in that if light of a first uniformity were propagated therethrough, an uncompensated image would be displayed to a user via uncompensated image light propagating from the imaging subsystem to the user, the image light having a first portion with a first value of a radiant property and a second portion with a second value of the radiant property, a difference between the first and second values being a first amount; and
a light source configured to emit source light of a second, predetermined uniformity through the imaging system such that when the source light is propagated through the imaging subsystem, a compensated image is displayed to the user via compensated image light, a first portion of the compensated image light having a third value of the radiant property, and the second portion of the image light having a fourth value of the radiant property, a difference between the third and fourth values being a second amount, the second amount being less than the first amount.
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Accused Products
Abstract
A system and method for optimizing image uniformity in a head-up display (HUD) are provided. An imaging subsystem is characterized in that if light of a first uniformity is propagated therethrough, an uncompensated image would be displayed to a user via uncompensated image light. The uncompensated image light has first and second portions with respective first and second values of a radiant property. A difference between the first and second values is a first amount. The light source is configured to emit source light of a second, predetermined uniformity through the imaging system such that a compensated image is displayed to the user via compensated image light. The first portion of the compensated image light has a third value of the radiant property, and the second portion of the compensated image light has a fourth value of the radiant property. A difference between the third and fourth values is less than the first amount.
17 Citations
20 Claims
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1. A head-up display (HUD) system comprising:
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an imaging subsystem characterized in that if light of a first uniformity were propagated therethrough, an uncompensated image would be displayed to a user via uncompensated image light propagating from the imaging subsystem to the user, the image light having a first portion with a first value of a radiant property and a second portion with a second value of the radiant property, a difference between the first and second values being a first amount; and a light source configured to emit source light of a second, predetermined uniformity through the imaging system such that when the source light is propagated through the imaging subsystem, a compensated image is displayed to the user via compensated image light, a first portion of the compensated image light having a third value of the radiant property, and the second portion of the image light having a fourth value of the radiant property, a difference between the third and fourth values being a second amount, the second amount being less than the first amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A head up display (HUD) system comprising:
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a liquid crystal display (LCD) panel configured to modulate light propagating therethrough; at least one lens arranged to focus the light propagating from the LCD panel; an image combiner to simultaneously capture the light from the at least one lens and display a first image to a user and transmit light propagated from an object to display a second image to the user, the LCD display panel, the at least one lens, and the image combiner jointly forming an imaging subsystem characterized in that if light of a first uniformity were propagated therethrough, an uncompensated first image would be displayed to the user via uncompensated image light propagating from the image combiner to the user, the uncompensated image light having a first portion with a first value of a radiant property and a second portion with a second value of the radiant property, a difference between the first and second values being a first amount; and a light source comprising a plurality of light generating components configured to emit source light of a second, predetermined uniformity through the imaging system such that when the source light is propagated through the imaging subsystem, a compensated first image is displayed to the user via compensated image light, a first portion of the compensated image light having a third value of the radiant property and a second portion of the image light having a fourth value of the radiant property, a difference between the third and fourth values being a second amount, the second amount being less than the first amount, the first portion of the compensated image light corresponding to the first portion of the uncompensated image light and the second portion of the compensated image light corresponding to the second portion of the uncompensated image light. - View Dependent Claims (12, 13, 14, 15)
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16. A method for optimizing image uniformity in a head up display (HUD) comprising:
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providing a HUD imaging subsystem comprising a viewing screen; determining a difference between a first value of a radiant property of a first portion of image light propagated to a user from the viewing screen and a second value of a radiant property of a second portion of the image light propagated to the user from the viewing screen, said image light being propagated to the user when light of a first uniformity is propagated into the imaging subsystem; and providing a light source configured to emit source light of a second, predetermined uniformity through the imaging system such that the first portion of the image light has a third value of the radiant property and the second portion of the image light has a fourth value of the radiant property, a difference between the third and fourth values of the radiant property being less than the difference between the first and second values of the radiant property. - View Dependent Claims (17, 18, 19, 20)
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Specification