Signal processing apparatus, liquid crystal apparatus, electronics device and signal processing method
AssigneeSeiko Epson Corporation
InventorsHaruhiko Nishimura, Junichi Wakabayashi
Life of this patent
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Abstract
In the case where a gray-scale difference Δ1 between a pixel 110a and a pixel 110b, a gray-scale difference Δ2 between the pixel 110b and a pixel 110c are each larger than a threshold value, and Δ1>Δ2, gray-scale values of the pixels 110a, 110b and 110c are corrected into the gray-scale value of the pixel 110b+Δ1×(1−α), the gray-scale value of the pixel 110c+Δ2×(1−α), and the gray-scale value of the pixel 110c+Δ2×β, respectively (0≦α, β≦0.5). After the correction, a gray-scale different Δ1a between the pixels 110a and 110b, and a gray-scale different Δ2a between the pixels 110b and 110c satisfy the following formulas: Δ1a>Δ1, and Δ2a>Δ2, respectively.
Claims12
A signal processing apparatus that is used for a liquid crystal apparatus provided with a plurality of pixels, and that processes a signal for controlling gray-scale for display of each of the plurality of pixels, the signal processing apparatus comprising:
- a first detection unit configured to, in the case where a first pixel is arranged between a second pixel and a third pixel, the first pixel, the second pixel and the third pixel being pixels among the plurality of pixels, detect a difference between a first gray-scale value corresponding to the first pixel and a second gray-scale value corresponding to the second pixel as a first gray-scale difference;
- a second detection unit configured to detect a difference between the first gray-scale value corresponding to the first pixel and a third gray-scale value corresponding to the third pixel as a second gray-scale difference;
- a comparison unit configured to compare the first gray-scale difference and the second gray-scale difference;
- and
- a correction unit configured to make correction of at least two of the first gray-scale value, the second gray-scale value and the third gray-scale value such that the first gray-scale difference is reduced to a third gray-scale difference smaller than the first gray-scale difference and the second gray-scale difference is reduced to a fourth gray-scale difference smaller than the second gray-scale difference, and such that the third gray-scale difference is larger than the fourth gray-scale difference when the first gray-scale difference is larger than the second gray-scale difference, and the third gray-scale difference is smaller than the fourth gray-scale difference when the first gray-scale difference is smaller than the second gray-scale difference.
A signal processing apparatus that is used for a liquid crystal apparatus provided with a plurality of pixels, and that processes a signal for controlling gray-scale for display of each of the plurality of pixels, the signal processing apparatus comprising:
- a first detection unit configured to, in the case where a first pixel is arranged between a second pixel and a third pixel, the first pixel, the second pixel and the third pixel being pixels among the plurality of pixels, and a first difference between a first gray-scale value corresponding to the first pixel and a second gray-scale value corresponding to the second pixel is larger than or equal to a threshold value, detect the first difference as a first gray-scale difference;
- a second detection unit configured to, when a second difference between the first gray-scale value corresponding to the first pixel and a third gray-scale value corresponding to the third pixel is larger than or equal to the threshold value, detect the second difference as a second gray-scale difference;
- a comparison unit configured to compare the first gray-scale difference and the second gray-scale difference;
- and
- a correction unit configured to make correction of at least two of the first gray-scale value, the second gray-scale value and the third gray-scale value such that the first gray-scale difference is reduced to a third gray-scale difference smaller than the first gray-scale difference and the second gray-scale difference is reduced to a fourth gray-scale difference smaller than the second gray-scale difference, and such that the third gray-scale difference is larger than the fourth gray-scale difference when the first gray-scale difference is larger than the second gray-scale difference, and the third gray-scale difference is smaller than the fourth gray-scale difference when the first gray-scale difference is smaller than the second gray-scale difference.
A signal processing method that is used for a liquid crystal apparatus provided with a plurality of pixels, and that processes a signal for controlling gray-scale for display of at each of the plurality of pixels, the signal processing method comprising:
- in the case where a first pixel is arranged between a second pixel and a third pixel, the first pixel, the second pixel and the third pixel being pixels among the plurality of pixels, and a first difference between a first gray-scale value corresponding to the first pixel and a second gray-scale value corresponding to the second pixel is larger than or equal to a threshold value, detecting the first difference as a first gray-scale difference;
- when a second difference between the first gray-scale value corresponding to the first pixel and a third gray-scale value corresponding to the third pixel is larger than or equal to the threshold value, detecting the second difference as a second gray-scale difference;
- comparing the first gray-scale difference and the second gray-scale difference;
- and
- correcting at least two of the first gray-scale value, the second gray-scale value and the third gray-scale value such that the first gray-scale difference is reduced to a third gray-scale difference smaller than the first gray-scale difference and the second gray-scale difference is reduced to a fourth gray-scale difference smaller than the second gray-scale difference, and such that the third gray-scale difference is larger than the fourth gray-scale difference when the first gray-scale difference is larger than the second gray-scale difference, and the third gray-scale difference is smaller than the fourth gray-scale difference when the first gray-scale difference is smaller than the second gray-scale difference.
Dependencies are inferred from the claim text.