Brightness correction apparatus and method for plasma display
First Claim
1. A brightness correction apparatus of a plasma display, of which a brightness error of ideal display brightness and actual display brightness for each gray scale has been established, the apparatus comprising:
- an inverse y conversion lookup unit, to receive an input signal of a currently displaying pixel, and to convert the input signal into a first gray scale data to be output according to an inverse y conversion rule;
an error diffusion unit, coupled to the inverse y conversion lookup unit to receive the first gray scale data, and to modify the first gray scale data into a second gray scale data recorded as a display brightness error of the currently displaying pixel by considering a display brightness error of a neighboring pixel of the currently displaying pixel; and
a gray scale lookup unit, coupled to the error diffusion unit to receive an integral portion of the second gray scale data, and to look up a gray scale allocation table to obtain a sustain pulse number of the currently displaying pixel.
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Abstract
Brightness correction apparatus and method for a plasma display, where the non-linear relationship between the gray scale and the brightness of the plasma display is considered. The brightness error is measured to build up a brightness error table. When the gray scale data of the currently displaying pixel is received, the brightness error diffusion method is applied. The weighted display brightness error of the neighboring pixel is incorporated for calculation to obtain an optimal display result. When the modified output gray scale data is derived by calculation, the brightness error table is looked up, and the display brightness error of the currently displaying pixel is thus saved to provide modification calculation for other pixels.
141 Citations
13 Claims
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1. A brightness correction apparatus of a plasma display, of which a brightness error of ideal display brightness and actual display brightness for each gray scale has been established, the apparatus comprising:
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an inverse y conversion lookup unit, to receive an input signal of a currently displaying pixel, and to convert the input signal into a first gray scale data to be output according to an inverse y conversion rule;
an error diffusion unit, coupled to the inverse y conversion lookup unit to receive the first gray scale data, and to modify the first gray scale data into a second gray scale data recorded as a display brightness error of the currently displaying pixel by considering a display brightness error of a neighboring pixel of the currently displaying pixel; and
a gray scale lookup unit, coupled to the error diffusion unit to receive an integral portion of the second gray scale data, and to look up a gray scale allocation table to obtain a sustain pulse number of the currently displaying pixel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A brightness correction apparatus of a plasma display, of which a brightness error of ideal display brightness and actual display brightness for each gray scale has been established, the apparatus comprising:
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an inverse y conversion lookup unit, to receive an input signal of a currently displaying pixel, and to convert the input signal into a first gray scale data to be output according to an inverse y conversion rule;
an error diffusion unit, coupled to the inverse y conversion lookup unit to receive the first gray scale data, and to modify the first gray scale data into a second gray scale data recorded as a display brightness error of the currently displaying pixel by considering a display brightness error of a neighboring pixel of the currently displaying pixel; and
an integer gray scale lookup unit, coupled to the error diffusion unit to receive an integral portion of the second gray scale data, and to look up an integer gray scale table to obtain a third gray scale data; and
a gray scale allocation lookup unit, coupled to the integer gray scale lookup unit to receive the third gray scale data, and to look up a gray scale allocation table to obtain a sustain pulse number of the currently displaying pixel to be output. - View Dependent Claims (9, 10)
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11. A brightness correction method of a plasma display, comprising:
- obtaining a brightness error for each gray scale by measuring ideal display brightness and actual display brightness thereof, so as to establish a brightness error table;
receiving a first gray scale data of a currently displaying pixel;
adding the first gray scale data to a weighted display brightness of a neighboring pixel of the currently displaying pixel as a second gray scale data;
looking up the brightness error table to obtain the brightness error of the second gray scale data; and
recording the brightness error of the second gray scale data as the display brightness error of the currently displaying pixel. - View Dependent Claims (12, 13)
- obtaining a brightness error for each gray scale by measuring ideal display brightness and actual display brightness thereof, so as to establish a brightness error table;
Specification