Method of displaying an image on liquid crystal display and a liquid crystal display

• US 6,396,469 B1
• Filed: 09/11/1998
• Issued: 05/28/2002
• Est. Priority Date: 09/12/1997
• Status: Expired due to Term

• Current Assignee: AU Optronics Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Sueoka, Kuniaki, Nakamura, Hajime, Miwa, Koichi
• Primary Examiner(s): Hjerpe, Richard
• Assistant Examiner(s): LESPERANCE, JEAN E
• Application Number:
  US09/150,975
• Time in Patent Office: 1,355 Days
• Field of Search: 345/87,88,89,100,103,63
• US Class Current: 345/87
• CPC Class Codes: G09G 2310/061 for resetting or blanking
• CPC Class Codes: G09G 3/2011 by amplitude modulation
• CPC Class Codes: G09G 3/3666 with the matrix divided into sections

Abstract

A system and method of displaying an image on a liquid crystal display equipped with a crystal panel which comprise a plurality of gate lines, a plurality of data lines, and pixel cells disposed in the shape of a matrix corresponding to the intersections of the gate lines and the data lines, the method comprising the steps of: (a) selecting the gate line for the display of an image on the liquid crystal panel in a first term during a frame period for displaying one image and moreover supplying an image signal to display the image to the data line; and (b) selecting the gate line again in a second term during the same frame period as that of the first term, the first term and the second term being in the same frame period, and supplying a non-image signal having a predetermined potential and different from the image signal to the data line during the second term, whereby supply of the non-image signal is for displaying a blanking image.

Claims

1. A method of displaying an image on a liquid crystal display equipped with a crystal panel which comprises a plurality of gate lines, a plurality of data lines, and pixel cells disposed in the shape of a matrix corresponding to the intersections of said gate lines and said data lines, comprising the steps of:

(a) selecting said gate line for the display of an image on said liquid crystal panel in a first term during a frame period for displaying one image and moreover supplying an image signal to display said image to said data line; and

(b) selecting said gate line again in a second term during the same frame period as that of said first term, said first term and said second term being in the same frame period, and supplying a non-image signal having a predetermined potential and different from said image signal to said data line during said second term, whereby supply of said non-image signal is for displaying a blanking image.

2. The method as set forth in claim 1, wherein said non-image signal is a signal for displaying a blanking image on said liquid crystal panel.

3. The method as set forth in claim 1, wherein said blanking image is a black image.

4. The method as set forth in claim 1, wherein said liquid crystal panel is a liquid crystal panel using a bent orientation cell, a ferroelectric liquid crystal panel or antiferroelectric liquid crystal panel.

5. The method as set forth in claim 1, wherein the occupying ratio of the display period of said pixel cell during said one frame period is within the range of 20% to 75%.

6. The method as set forth in claim 1, wherein the occupying ratio of the display period of said pixel cell during said one frame period is within the range of 30% to 60%.

7. The method as set forth in claim 1, wherein the period for displaying said one image is one frame period.

8. The method as set forth in claim 7, wherein said one term is shifted from said another term by ½

frame period.

9. A liquid crystal display comprising:

a plurality of gate lines;

first and second data line groups each comprising a plurality of data lines;

a liquid crystal panel divided into a first pixel array and a second pixel array wherein said first pixel array comprises said gate lines, said data lines in said first data line group and pixel cells disposed in the shape of a matrix corresponding to the intersections of said gate lines and said data lines and said second pixel array comprises said gate lines, said data lines in said second data line group and pixel cells disposed in the shape of a matrix corresponding to the intersections of said gate lines and said data lines;

gate line driver for selecting said gate line for each of said first and said second pixel arrays;

a first data line driver for supplying a signal to said data line in said first data line group;

a second data line driver for supplying a signal to said data line in said second data line group;

a controller for controlling said gate line driver so as to select said gate line for each of said first and second pixel arrays in order to display an image on said liquid crystal panel in a first term during a frame period for displaying one image and controlling said first and second data line drivers so as to supply an image signal for displaying said image to said first and second data line groups and moreover for controlling said gate line driver so as to again select said gate line for each of said first and second data pixel arrays and controlling said first and second data line drivers so as to supply a non-image signal having a predetermined voltage and different from said image signal to the first and second data line groups in a second term, said first term and said second term being in the same frame period, whereby supply of said non-image signal is for displaying a blanking image.

10. A liquid crystal display as setforth in claim 9, wherein said non-image signal is a signal for displaying a blanking image on said liquid crystal panel.

11. A liquid crystal display as set forth in claim 9, wherein said blanking image is a black image.

12. A liquid crystal display as set forth in claim 9, wherein said liquid crystal panel is a liquid crystal panel using a bent orientation cell, a ferroelectric liquid crystal panel or antiferroelectric liquid crystal panel.

13. A liquid crystal display as set forth in claim 9, wherein the occupying ratio of the displaying period of said pixel cell during said one frame period is within the range of 20% to 75%.

14. A liquid crystal display as set forth in claim 9, wherein the occupying ratio of the display period of said pixel cell during said one frame period is within the range of 30% to 60%.

15. The liquid crystal display as set forth in claim 9, wherein the period for displaying said one image is one frame period.

16. The liquid crystal display as set forth in claim 15, wherein said one term is shifted from said another term by ½

frame period.