Matrix display device

• US 4,481,511 A
• Filed: 12/30/1981
• Issued: 11/06/1984
• Est. Priority Date: 01/07/1981
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Takasaka, Masahiro, Hanmura, Hisao
• Primary Examiner(s): Brigance, Gerald L.
• Application Number:
  US06/335,690
• Time in Patent Office: 1,042 Days
• Field of Search: 340/765, 340/763, 340/752, 340/784, 340/802, 340/799, 350/333, 350/332
• US Class Current: 345/100
• CPC Class Codes: G09G 3/3644 with the matrix divided into sections

Abstract

Disclosed is a matrix display device comprising: a matrix display panel having a plurality rows of row electrodes and a plurality column of column electrodes and a display medium interposed therebetween, crosspoints of the row electrodes and the column electrodes defining picture cells arranged in matrix, each column of the column electrodes opposing to respective one column of the matrix picture cells being divided into a plurality of groups with a predetermined regularity and electrically interconnected within each group, terminals of at least two groups of column electrodes of the plurality of groups of column electrodes being arranged to extend to the same side of the matrix display panel; a row electrode drive circuit for producing row electrode drive signals to be applied to the row electrodes in accordance with a video data; a column electrode drive circuit for producing column electrode drive signals to be applied to the at least two groups of column electrodes in accordance with the video data; a video data circuit for supplying said video data to said row electrode drive circuit and said column electrode drive circuit.

In the device, the outputs of the column electrode drive circuit or the video data to be supplied to the column electrode drive circuit are arranged in the same order as the arrangement of the terminals of the at least two groups of column electrodes.

Claims

1. A matrix display device comprising:

a matrix display panel having a plurality of rows of row electrodes and a plurality of columns of column electrodes and a display medium interposed therebetween, crosspoints of said row electrodes and said column electrodes defining picture cells arranged in a matrix form, each of said column electrodes forming part of a respective single column of matrix picture cells and being divided into a plurality of groups of cell electrodes with a predetermined regularity, each group of cell electrodes being electrically interconnected within each column, and terminals of at least two groups of cell electrodes in each of said plurality of column electrodes being arranged to extend to the same side of said matrix display panel;

a row electrode drive circuit for producing row electrode drive signals to be applied to said row electrodes in accordance with received video data;

a column electrode drive circuit for producing column electrode drive signals to be applied to said two groups of cell electrodes in each column in accordance with said video data, outputs of said column electrode drive circuit being arranged in the same order as the arrangement of said terminals of said two groups of cell electrodes in each column; and

a video data circuit for supplying said video data to said row electrode drive circuit and said column electrode drive circuit, including at least one memory for temporarily storing at least one row of picture cells of video data and switch means for producing a plurality of rows of picture cells of video data in one scan line period based on said one row of picture cells of video data stored in said memory and one adjacent row of picture cells of video data not stored in said memory.

3. A matrix display device according to claim 1 or 2, wherein said display medium is a liquid crystal.

4. A matrix display device according to claim 1 or 2, wherein said memory in said video data circuit includes a frame memory for storing one frame of video data at addressable storage locations and a memory drive circuit for driving said frame memory.

5. A matrix display device according to claim 4, wherein said frame memory is divided into a plurality of blocks equal in number to the number of said groups of said cell electrodes in each column.

6. A matrix display device according to claim 5, wherein said memory drive circuit includes means for sequentially specifying at least one of said plurality of blocks of said frame memory and means for specifying an address of a storage location in said selected block.

7. A matrix display device according to claim 1 or 2, wherein said matrix display panel defines n rows (n≧

2) of picture cells formed in part by each of said plurality of row electrodes, and wherein the picture cells in each column formed in part by the same row electrode belong to n different groups of cell electrodes.

8. A matrix display device according to claim 7, wherein the order of arrangement of 2 n rows by one column of picture cells formed in part by two adjacent row electrodes of said n different groups of opposing cell electrodes is reversed for each row electrode.

2. A matrix display device comprising:

a matrix display panel having a plurality of rows electrodes and a plurality of column electrodes and a display medium interposed therebetween, crosspoints of said row electrodes and said column electrodes defining picture cells arranged in a matrix form, each of said column electrodes forming part of a respective single column of matrix picture cells and being divided into a plurality of groups of cell electrodes with a predetermined regularity, each group of cell electrodes being electrically interconnected within each column, and terminals of at least two groups of cell electrodes of said plurality of column electrodes being arranged to extend to the same side of said matrix display panel;

a row electrode drive circuit for producing row electrode drive signals to be applied to said row electrodes in accordance with received video data,

a column electrode drive circuit for producing column electrode drive signals to be applied to said two groups of cell electrodes in accordance with said video data; and

a video data circuit for supplying said video data to said row electrode driver and said column electrode driver, said video data supplied to said column electrode drive circuit being arranged in the same order as the arrangement of said terminals of said two groups of cell electrodes in each column, and including at least one memory for temporarily storing at least one row of picture cells of video data and switch means for producing a plurality of rows of picture cells of video data in one scan line period based on said one row of picture cells of video data stored in said memory and one adjacent row of picture cells of video data not stored in said memory.

9. A matrix display device, comprising

a display panel formed by a matrix of picture cells and having row electrodes, column electrodes and a display medium interposed therebetween, whereby the crosspoints of the rows and columns formed by said row electrodes and said column electrodes define said picture cells, each of said column electrodes being divided electrically into plural groups of interconnected cell electrodes, and terminals connected respectively to at least two groups of cell electrodes in each column are arranged at the same side of said display panel;

a row electrode drive circuit connected to said row electrodes to supply driving voltages thereto;

a column electrode drive circuit having a line memory and providing respective outputs connected to at least two groups of the cell electrodes in each column;

a buffer memory connected to receive from a video data input and temporarily store at least the video data of a single scan line; and

switch means connected to said buffer memory and said data input for supplying said line memory alternatively with the video data from said video data input and said buffer memory so that the video data is arranged in said line memory with the respective cell data of plural adjacent scan lines interdigitated corresponding to the subdivision in groups of the connected cell electrodes in each column.

10. A matrix display device according to claim 9 characterized in that the sequence of the arrangement of cell electrodes of respective groups in the columns as defined by the subdivision of the column electrodes is reversed for successive row electrodes.

11. A matrix display device comprising

a display panel formed by a matrix of picture cells and having row electrodes, column electrodes and a display medium interposed therebetween, whereby the crosspoints of the rows and columns formed by said row electrodes and said column electrodes define said picture cells, each of said column electrodes being divided electrically into plural groups of interconnected cell electrodes, and terminals connected respectively to at least two groups of cell electrodes in each column are arranged at the same side of said display panel;

a row electrode drive circuit connected to said row electrodes to supply driving voltages thereto;

a column electrode drive circuit having a line memory and providing respective outputs connected to at least two groups of the cell electrodes in each column;

a frame memory connected to receive from a video data input and store one frame of video data; and

read-out means connected to said video data input and said frame memory for reading out video data from the frame memory to the line memory in a sequence so that the video data is arranged in the line memory with the respective cell data of plural adjacent scan lines interdigitated corresponding to the subdivision in groups of the connected cell electrodes in each column.

12. A matrix display device according to claim 11 characterized in that the frame memory is divided into a plurality of blocks equal in number to said different groups of cell electrodes in each column, and said read-out means includes means for selectively reading out the video data from the blocks and for supplying the read-out data to the line memory with the video data being arranged corresponding to the subdivision in groups of the connected cell electrodes in each column.