Light display panel control
First Claim
1. An illuminated display panel having at least one matrix of light pixels, each pixel comprising at least three monochrome electric light elements emitting light respectively in at least three complementary colors, operation of the light elements being controlled by an electronic control system which determines an electrical power P applied to each light element, it being possible to express this electric power in the form of P=k.Pr, where:
- Pr is a reference electrical power specific to the light elements of each color and k is a real number at least equal to 0, chosen as a function of the display to be presented on the panel, characterized in that the electronic control system is set up to vary the reference electrical power Pr specific to the light elements of each color over time, in accordance with a different predetermined variation depending on the colors, in order to compensate, at least partially, for the effects of aging of the light elements, so as to avoid a drift in the colors of displays displayed by the panel.
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Accused Products
Abstract
The disclosure concerns a light display panel with a matrix of pixels each comprising three monochrome electroluminescent diodes of three colors. The diodes are controlled by a control circuit delivering electrical power P to each diode, said electrical power being expressed in the form P−k.Pr, wherein Pr is a reference electrical power particular to the diodes of each color and k is a coefficient selected according to the display to be presented. Over the course of time the reference electrical power is subjected to different variations depending on the colors, to compensate for the aging of the diodes.
133 Citations
7 Claims
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1. An illuminated display panel having at least one matrix of light pixels, each pixel comprising at least three monochrome electric light elements emitting light respectively in at least three complementary colors, operation of the light elements being controlled by an electronic control system which determines an electrical power P applied to each light element, it being possible to express this electric power in the form of P=k.Pr, where:
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Pr is a reference electrical power specific to the light elements of each color and k is a real number at least equal to 0, chosen as a function of the display to be presented on the panel, characterized in that the electronic control system is set up to vary the reference electrical power Pr specific to the light elements of each color over time, in accordance with a different predetermined variation depending on the colors, in order to compensate, at least partially, for the effects of aging of the light elements, so as to avoid a drift in the colors of displays displayed by the panel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification