Display device, method of controlling the same, and projection-type display apparatus
AssigneeSony Corporation
InventorsTakashi Hirakawa, Masakazu Aoki
Life of this patent
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Abstract
A liquid-crystal display device performs a feedback process. A video signal is written on pixels on a unit by unit basis, each unit including a plurality of pixels (six pixels, for example). Scan pulses output from RGB LCD panels are supplied to a driver IC that supplies the RGB LCD panels with a variety of timing signals. A delay amount from the scan pulses from the optimum state thereof is measured. The delay amount is accounted for in a pulse that samples and holds the video signal, i.e., a pulsewidth control clock pulse.
Claims8
A display device comprising:
- a display having a matrix of pixels;
- phase shift detector means for detecting the amount of phase shift of a writing signal for writing a video signal onto the pixel, the phase shift of the writing signal being caused as a result of the passage thereof through the display;
- and
- control means for adjusting the timing of the writing signal in a feedback process based on the phase shift amount detected by the phase shift detector means so that the phase shift amount becomes zero and
- wherein the writing signal is generated based on a timing signal that parallel processes the video signal in units of pixels, each unit including a plurality of pixels, and writes the video signal onto the pixels on a unit by unit basis, and
- wherein the control means adjusts the timing of the timing signal based on the phase shift amount detected by the phase shift detector means so that the phase shift amount becomes zero.
A method of controlling a display device having a display including a matrix of pixels, the method comprising the steps of:
- detecting the amount of phase shift of a writing signal for writing a video signal onto the pixel, the phase shift of the writing signal being caused as a result of the passage thereof through the display;
- and
- adjusting the timing of the writing signal in a feedback vrocess based on the detected phase shift amount so that the phase shift amount becomes zero and
- wherein the writing signal is generated based on a timing signal that parallel processes the video signal in units of pixels, each unit including a plurality of pixels, and writes the video signal onto the pixels on a unit by unit basis, and
- wherein the adjusting step comprises adjusting the timing of the timing signal based on the phase shift amount detected in the detecting step so that the phase shift amount becomes zero.
A projection-type display apparatus comprising:
- a display panel having a matrix of pixels;
- phase shift detector means for detecting the amount of phase shift of a writing signal for writing a video signal onto the pixel, the phase shift of the writing signal being caused as a result of the passage thereof through the display panel;
- and
- control means for adjusting the timing of the writing signal in a feedback process based on the phase shift amount detected by the phase shift detector means so that the phase shift amount becomes zero;
- wherein the writing signal is generated based on a timing signal that parallel processes the video signal in units of pixels, each unit including a plurality of pixels, and writes the video signal onto the pixels on a unit by unit basis, and
- wherein the control means adjusts the timing of the timing signal based on the phase shift amount detected by the phase shift detector means so that the phase shift amount becomes zero.
Dependencies are inferred from the claim text.