Method of operation for an active matrix type display device

• US 5,012,228 A
• Filed: 07/10/1990
• Issued: 04/30/1991
• Est. Priority Date: 08/04/1987
• Status: Expired due to Fees

• Current Assignee: Nippon Telegraph and Telephone Corporation
• Original Assignee: Nippon Telegraph and Telephone Corporation
• Inventors: Kimura, Kazuo, Kohda, Shigeto, Masuda, Kiyoshi, Sakai, Shigenobu, Nomura, Tomoyoshi
• Primary Examiner(s): Brier, Jeffery A.
• Application Number:
  US07/551,034
• Time in Patent Office: 294 Days
• Field of Search: 340/701, 340/702, 340/703, 340/718, 340/719, 340/765, 340/783, 340/784, 340/785, 340/786, 340/787, 340/788, 340/805, 350/332, 350/333, 350/339 F
• US Class Current: 345/88
• CPC Class Codes: G02F 1/13624 having more than one switching element per pixel
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2330/08 Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3659 the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
• CPC Class Codes: G09G 3/3677 suitable for active matrices only
• CPC Class Codes: G09G 3/3688 suitable for active matrices only

Abstract

An active matrix type display device is disclosed having an m number of unit pixel array blocks repetitively arranged in a row direction. Each pixel array block comprises a k rows×n columns matrix of display elements (Cij, i=1, 2, . . . n, j=1, 2, . . . n) and scanning lines G1 . . . Gn and data signal lines D1 . . . Dn are arranged in an intersecting fashion with first and second switching elements of each display element connected to the corresponding lines in a manner to provide different data input routes.

Claims

1. A method of operation for an active matrix type display device including:

an m number (m≧

2) of pixel array blocks arranged in a row direction, each pixel array block having a plurality of display elements (Cij;

i=1,2, . . . k;

j=1 . . . n) arranged as a K rows×

n columns (K≧

2, n≧

1) array;

a K+1 number of scanning lines (G1, . . . , GK+1) arranged in said row direction in each pixel array block to supply scanning signals for selectively scanning the corresponding display elements;

a j+1 number of data lines (D1 . . . Dj+1) arranged in a column direction in each pixel array block to supply data signals to the corresponding display elements and located in an intersecting fashion to said scanning lines; and

first and second switching elements (TKnA, TKnB) connected between the data lines and the corresponding display element and independently connected to two adjacent scanning lines, respectively, between which the respective display element for the first and second switching elements is located, whereby different display data input routes are established relative to the display elements via two adjacent data lines in a j+1 number of data lines, said method comprising the step of enabling the display elements on a respective row which are included into said plurality of display elements in the matrix array constituted by the pixel array block to display back-up and normal display data for respective odd-and-even-numbered frames, and including the steps of;

(a) sequentially writing normal red, green and blue display data into the corresponding display elements on one row, while at the same time sequentially writing back-up red, green and blue display data into diagonally adjacent corresponding display elements, in accordance with scanning signals selected by a common scanning line, relative to display elements, located between one row and another adjacent row; and

(b) writing the normal red, green and blue display data into said diagonally adjacent display elements, in place of said back-up red, green and blue display data, in accordance with scanning signals selected by another scanning line adjacent to said scanning line.