Display devices having color sequential illumination
First Claim
1. A method of operating a display device having a lattice of selectably settable pixel elements, the method comprising time multiplex addressing pixel elements of the display during each of a plurality of time intervals within a display period and, contemporaneously therewith illuminating the lattice to produce within a display period a plurality of light outputs each having a respective colour characteristic and a respective time interval within the display period, the time multiplexed addressing of pixel elements arranged to produce a light output of at least one respective colour characteristic during any display period, which output is arranged in a first sequence direction, and the time multiplexed addressing is arranged to produce a light output of the said at least one respective colour characteristic during a display period following the said any display period and being arranged in a second sequence direction opposite to the first sequence direction.
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Accused Products
Abstract
A color sequential liquid crystal display, such as a television display, includes a lattice of selectably settable pixel elements which are time multiplexed addressed and illuminated during addressing to produce sequential red green and blue light outputs in any display period. The addressing of pixel elements in successive frame periods is arranged to occur in opposing directions so as to compensate spatial intensity variation which would otherwise arise from illumination of the pixel elements during the addressing.
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Citations
18 Claims
- 1. A method of operating a display device having a lattice of selectably settable pixel elements, the method comprising time multiplex addressing pixel elements of the display during each of a plurality of time intervals within a display period and, contemporaneously therewith illuminating the lattice to produce within a display period a plurality of light outputs each having a respective colour characteristic and a respective time interval within the display period, the time multiplexed addressing of pixel elements arranged to produce a light output of at least one respective colour characteristic during any display period, which output is arranged in a first sequence direction, and the time multiplexed addressing is arranged to produce a light output of the said at least one respective colour characteristic during a display period following the said any display period and being arranged in a second sequence direction opposite to the first sequence direction.
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14. A display device comprising:
- a lattice of selectably settable pixel elements;
addressing means for time multiplex addressing pixel elements during each of a plurality of time intervals within a display period for the display; and
illumination means for illuminating the lattice contemporaneously with the time multiplexed addressing thereof, for providing within a display period a plurality of light outputs each having a respective colour characteristic and a respective time interval within the display period, the addressing means being arranged to time multiplex address pixel elements in a first sequence direction in any one display period to produce a light output of at least one respective colour characteristic, and in a display period following the said any one display period, to time multiplex address pixel elements in a second sequence direction to produce a light output of the said at lease one respective colour characteristic, the second sequence direction being opposite to the first sequence direction. - View Dependent Claims (15, 16, 17, 18)
- a lattice of selectably settable pixel elements;
Specification