Color liquid-crystal display apparatus with rectilinear arrangement

• US 5,006,840 A
• Filed: 11/27/1989
• Issued: 04/09/1991
• Est. Priority Date: 04/13/1984
• Status: Expired due to Term

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Hamada, Hiroshi, Kimura, Naofumi, Takamatsu, Toshiaki
• Primary Examiner(s): Brier, Jeffery A.
• Application Number:
  US07/442,391
• Time in Patent Office: 498 Days
• Field of Search: 340/701, 340/702, 340/703, 340/784, 340/765, 350/339 F, 350/331 R, 350/334, 350/336, 358/56, 358/61
• US Class Current: 345/88
• CPC Class Codes: G02F 1/13306 Circuit arrangements or driving methods for the control of single liquid crystal cells G02F1/132, G02F1/133382 take precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2310/0297 Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

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.

Claims

1. 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 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,

said picture elements groups being disposed over said scanning electrodes and said signal electrodes such that said color picture elements of each color are linearly arranged at a one pixel element pitch in each row in said first direction and in each column in said second direction and only color picture elements of the same color are connected to each said signal electrode to alleviate the need for a color switching circuit.

2. The color liquid crystal display apparatus claimed in claim 1, further including a nonlinear element connecting each color picture element to respective scanning electrodes.

3. The color liquid crystal display apparatus claimed in claim 1, further including a switching element connecting each color picture element to respective scanning electrodes.

4. An apparatus, as claimed in claim 1, wherein each picture element group is arranged in an "L" configuration consisting of two picture elements disposed over a scan electrode in a first line and one picture element disposed over a scan electrode in a second line.