Color liquid-crystal display apparatus with rectilinear arrangement
AssigneeSharp Kabushiki Kaisha
InventorsHiroshi Hamada, Toshiaki Takamatsu, Naofumi Kimura
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Abstract
In a color liquid-crystal display apparatus using mosaic arrangements, the same color of picture elements which are driven by the same signal electrode are alternately arranged right and left. Accordingly, all that is necessary is that the same color of picture signal is applied upon the same signal electrode in spite of the mosaic arrangement. Thus, a circuit which switches a color image signal of an analog line memory is unnecessary, so that the driving circuit is extremely simplified.
Claims12
An apparatus for driving a color liquid crystal display device including a plurality of scanning electrodes linearly arranged in a first direction, a plurality of signal electrodes linearly arranged in a second direction perpendicular to the first direction, and a plurality of picture elements, one corresponding to scanning and signal electrode intersections, the picture elements being of a red, blue, or green color, wherein the plurality of picture elements comprise a plurality of picture element groups, each of said plurality of picture element groups arranged in a pixel mosaic matrix, the matrix including a plurality of orthogonally disposed rows and columns of picture elements, the number of columns being two and the number of rows being three, the apparatus comprising:
- gate driving means for sequentially applying voltage to each of the plurality of scanning electrodes;
- and
- line memory means for applying voltage to each of the plurality of signal electrodes based upon input red, green and blue data signals, to thereby drive corresponding red, green and blue color picture elements, arranged in one pixel element pitch, in said first direction, the line memory means including,
- a plurality of sample and hold means, each corresponding to one of said plurality of signal electrodes and one of said red, green, or blue colors,
- each for sampling and holding one of said red, green, and blue input data signal, and
- shift register means for sequentially activating each of said plurality of sample and hold means to sequentially allow application of voltage to each of said plurality of signal electrodes, based upon said data input signals, and sequentially driving of red, green and blue picture elements,
- said pixel mosaic matrix permitting each of said plurality of signal electrodes, which are connected to picture elements on each side, to be connected to a plurality of same color picture elements alternately arranged on each side of each of said plurality of signal electrodes.
A color liquid crystal display apparatus, comprising:
- a plurality of picture element groups arranged in a pixel mosaic matrix, the matrix including a plurality of orthogonally disposed rows and columns of picture elements, the number of columns being two and the number of rows being two, each picture element group including,
- a plurality of color picture elements each equal in area and each associated with a color corresponding to red, green or blue,
- a plurality of scanning electrodes linearly arranged in parallel rows and disposed over said matrix in a first direction, and
- a plurality of signal electrodes linearly arranged in parallel columns and disposed over said matrix in a second direction perpendicular to said first direction including,
- a plurality of green signal electrodes for transmitting a green color signal to a plurality of green picture elements,
- a plurality of combination red and blue signal electrodes for transmitting a red color signal to a plurality of red picture elements and a blue color signal to a plurality of blue picture elements;
- and
- color signal switching means for selecting one of the red color signal and the blue color signal for each of said plurality of combination red and blue signal electrodes for each of a plurality of clock cycles connected to a sample and hold means.
A color liquid crystal display apparatus comprising:
- a plurality of picture element groups arranged in a matrix, each picture element group including,
- a plurality of color picture elements, each of the plurality of color picture elements equal in area, each associated with a color corresponding to red, green or blue, and each associated with a type corresponding to first-type, second-type, or third-type,
- wherein a set of said plurality of color picture elements includes four of said plurality of color picture elements and a ratio of first-type color picture elements to second-type or third-type color picture elements is two to one;
- and said first-type color picture elements are arranged on both sides of a signal line, and said second-type and third-type color picture elements are arranged on both sides of the signal line, in different scanning lines;
- and
- a plurality of signal supply driving circuits including a first terminal to input a signal from a shift register and a second terminal to input one or two of red, green, and, blue signals for driving said plurality of color picture elements;
- wherein at least one of said plurality of signal supply driving circuits does not include a color switching circuit for driving color picture elements of different colors.
Dependencies are inferred from the claim text.