Increasing brightness in field-sequential color displays
First Claim
1. A display, comprising:
- a display panel, the panel having a plurality of pixels configured to modulate light in a temporal sequence so as to form an image during a frame, the pixels having a plurality of light modulating states, including OFF and ON;
a light source arrangement that illuminates the display panel, the light source arrangement being configured to selectively emit light of at least one of at least three different colors; and
a data ordering arrangement that is receptive of incoming video data and that generates drive signals that drive the pixels to the light modulating states;
wherein the frame is divided time-wise into multiple color segments and multiple transition periods, the color segments being time periods where the light source arrangement emits, and illuminates the panel with, only one of the different colors of light, wherein between each two of the color segments is a transition period, the transition period being a time period where the light source arrangement emits, and illuminates the panel with, varying amounts of two of the at least three different colors of light, wherein the incoming video data includes information from which the data ordering arrangement determines pixel brightness values for each color segment, wherein the drive signals cause certain individual pixels to be in the same state other than the OFF state during each of the transition periods of a frame.
3 Assignments
0 Petitions
Accused Products
Abstract
A display system includes a display panel having an array of pixels, the pixels having ON states and OFF states. The pixels form images by modulating light in a temporal sequence during an image frame in response to drive signals generated from incoming video data. A light source arrangement that emits at least two colors of light illuminates the display panel. The image frame is divided into color segments with only one color of light being emitted from the light source during each segment. The color segments are further divided into grayscale periods. Transition segments are provided for the transitions between colors. The state of each pixel during these transition segments is a function of the desired brightness level for each pixel, as derived from incoming video data.
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Citations
21 Claims
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1. A display, comprising:
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a display panel, the panel having a plurality of pixels configured to modulate light in a temporal sequence so as to form an image during a frame, the pixels having a plurality of light modulating states, including OFF and ON; a light source arrangement that illuminates the display panel, the light source arrangement being configured to selectively emit light of at least one of at least three different colors; and a data ordering arrangement that is receptive of incoming video data and that generates drive signals that drive the pixels to the light modulating states; wherein the frame is divided time-wise into multiple color segments and multiple transition periods, the color segments being time periods where the light source arrangement emits, and illuminates the panel with, only one of the different colors of light, wherein between each two of the color segments is a transition period, the transition period being a time period where the light source arrangement emits, and illuminates the panel with, varying amounts of two of the at least three different colors of light, wherein the incoming video data includes information from which the data ordering arrangement determines pixel brightness values for each color segment, wherein the drive signals cause certain individual pixels to be in the same state other than the OFF state during each of the transition periods of a frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A display, comprising:
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a display panel, the panel having a plurality of pixels configured to modulate light so as to form an image during a frame, the pixels having a plurality of light modulating states, including OFF and ON; a light source arrangement that illuminates the display panel, the arrangement including a broad-spectrum source of light and a color switching device to control the color of light emitted by the arrangement, the light source arrangement being configured to selectively emit light of at least one of at least three different colors, a first color, a second color, and a third color; and a data ordering arrangement that is receptive of incoming video data and that generates drive signals that drive the pixels to the light modulating states; wherein the frame is divided time-wise into color segments, the color segments being time periods where the light source arrangement emits, and illuminates the panel with, only one of the different colors of light, wherein between each two of the color segments is a transition period that is relatively shorter in time duration than the color segments, the transition period being a time period where the light source arrangement emits, and illuminates the panel with, varying amounts of two of the different colors of light there being one transition period during which varying amounts of the first and second color are emitted by the light source arrangement, a second transition period during which varying amounts of the second and third color are emitted by the light source arrangement, and a third transition period during which varying amounts of the first and third color are emitted by the light source arrangement; wherein, depending on the incoming video data, the data ordering arrangement provides data to place certain pixels into an ON state during at least a portion of each of the transition periods to increase the amount of light in the displayed image, the increased light having a color that is a selected combination of the first, second, and third colors.
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21. A display, comprising:
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a display panel, the panel having a plurality of pixels configured to modulate light in a temporal sequence so as to form an image during a frame, the pixels having a plurality of light modulating states, including OFF and ON; a light source arrangement that illuminates the display panel, the arrangement including a broad spectrum source of light and a color switching device to control the color of light emitted by the arrangement, the light source arrangement being configured to selectively emit light of at least one of at least three different primary additive colors, a first color, a second color, and a third color; and a data ordering arrangement that is receptive of incoming video data and that generates drive signals that drive the pixels to the light modulating states; wherein the frame is divided time-wise into color segments, the color segments being time periods where the light source arrangement emits, and illuminates the panel with, only one of the different primary additive colors of light, wherein between each two of the color segments is a transition period that is relatively shorter in time duration than the color segments, the transition period being a time period where the light source arrangement emits, and illuminates the panel with, varying amounts of two of the different primary additive colors of light; wherein, depending on the incoming video data, the data ordering arrangement provides data to place certain pixels into an ON state during at least a portion of each of the transition periods to increase the amount of light in the displayed image, the increased light having a color that is a selected combination of the first, second, and third colors.
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Specification