Flat display unit and method for converting color signal in the unit
AssigneeToshiba Matsushita Display Technology Co., Ltd.
InventorKimio Anai
Life of this patent
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Abstract
There is disclosed a flat display unit which can obtain color signals adapted to a pixel arrangement. The unit has a gate drive circuit and a source drive circuit. Among R, G, B input video signals, a G signal is regarded as a color signal of a reference, R and B signals are regarded as second and third color signals, a plurality of samples of the R signal are multiplied by coefficients and synthesized to generate a first interpolation color signal R′, a plurality of samples of the B signal are multiplied by coefficients and synthesized to generate a second interpolation color signal B′. The R′, B′ and G signal are successively selected and supplied to the source drive circuit.
Claims14
A flat display unit comprising:
- a pixel group which is two-dimensionally arranged in a display region and in which pixels for red (R), green (G) and blue (B) are repeatedly arranged in a row direction;
- a source drive circuit which outputs signals to a signal line group every scanning period and which supplies the signals to the corresponding pixels for red (R), green (G) and blue (B);
- a color signal interpolation circuit which defines any one of input video signals of red (R), green (G) and blue (B) as a first color signal of a reference, and the other two input video signals as second and third color signals, and which multiplies a plurality of time-shifted samples of the second color signal by coefficients, respectively, and synthesizes the samples to generate a first interpolation color signal, and which multiplies a plurality of time-shifted samples of the third color signal by coefficients, respectively, and synthesizes the samples to generate a second interpolation color signal;
- and
- a signal output circuit which supplies to the source drive circuit the first color signal, the first interpolation color signal, and the second interpolation color signal obtained.
A method for converting color signals in a flat display unit, wherein the unit having a pixel group which is two-dimensionally arranged in a display region and in which pixels for red (R), green (G) and blue (B) are repeatedly arranged in a row direction, a source drive circuit which outputs signals to a signal line group every scanning period and which supplies the signals to the corresponding pixels for red (R), green (G) and blue (B), and a color signal interpolation circuit, the method comprising:
- defining any one of input video signals of red (R), green (G) and blue (B) as a first color signal of a reference, and the other two input video signals as second and third color signals;
- multiplying a plurality of time-shifted samples of the second color signal by coefficients, respectively, and synthesizing the samples to generate a first interpolation color signal,
- multiplying a plurality of time-shifted samples of the third color signal by coefficients, and synthesizing the samples to generate a second interpolation color signal;
- and
- supplying the first color signal, the first interpolation color signal, and the second interpolation color signal, to the source drive circuit.
A method for converting color signals in a flat display unit, wherein the unit having a pixel group which is two-dimensionally arranged in a display region and in which pixels for red (R), green (G) and blue (B) are repeatedly arranged in a row direction, a source drive circuit which outputs signals to a signal line group every scanning period and which supplies the signals to the corresponding pixels for red (R), green (G) and blue (B), and a color signal interpolation circuit, the method comprising:
- inserting two zeros between the respective samples with respect to the first to third color signals, respectively;
- filtering the respective zero-inserted color signals with different weightings, respectively;
- and
- sampling and extracting the respective filtered outputs in desired phases, respectively.
Dependencies are inferred from the claim text.