Method of driving image display apparatus

• US 5,579,027 A
• Filed: 03/12/1996
• Issued: 11/26/1996
• Est. Priority Date: 01/31/1992
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Sakurai, Katsuhito, Miyawaki, Mamoru, Ishizaki, Akira
• Primary Examiner(s): Hjerpe, Richard
• Assistant Examiner(s): WU, XIAO MIN
• Application Number:
  US08/614,321
• Time in Patent Office: 259 Days
• Field of Search: 345/93, 345/92, 345/90, 345/88, 345/98, 345/99, 345/100, 345/208, 345/209, 345/211, 345/212, 345/213, 345/89, 345/87, 345/152
• US Class Current: 345/100
• CPC Class Codes: G09G 2310/0224 Details of interlacing
• CPC Class Codes: G09G 3/2011 by amplitude modulation
• 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 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 3/3688 suitable for active matrices only

Abstract

An image display apparatus, having a pixel configuration in which pixels on the n-th line and pixels on the n+1-th line are deviated in the horizontal direction, improves the resolution in the horizontal direction by changing over an image signal to be sampled between a delay signal DL and a through signal TH supplied from a delay circuit so as to deviate the image signal by a time corresponding to the deviation of the pixels. By sampling the image signal which corresponds to each line while deviating the image signal by the time which corresponds to the deviation of the pixels in the horizontal direction, the deviation between the pixel and the signal is eliminated, so that the resolution in the horizontal direction is improved.

Claims

1. A method of driving an image display apparatus having a plurality of horizontal lines of pixels, in which pixels on an n+1-th line are deviated from pixels on an n-th line by a deviation of z pixels in the horizontal direction, the deviation of said pixels in the horizontal direction being periodic with a period of y lines, where y is two or more, and which has y-1 delay circuits each having a respective delay quantity that is a respective integral multiple of zt, where t is a time corresponding to one pixel in the horizontal direction, the delay circuits being provided for an image signal line of a sampling circuit thereof, and which has y switches, said method of driving an image display apparatus comprising the steps of:

transmitting from each delay circuit a through signal and a delay signal delayed from the through signal by the delay quantity; and

sequentially changing over the y switches to change over between the delay signal and the through signal transmitted from each of said delay circuits at a period of y lines at each pixel line.

2. A method of driving an image display apparatus having a plurality of horizontal lines of pixels, in which pixels on an n+1-th line are deviated from pixels on an n-th line by a deviation of z pixels in the horizontal direction, the deviation of said pixels in the horizontal direction being periodic with a period of y lines, where y is two or more, and which has y-1 delay circuits each having a respective delay quantity that is a respective integral multiple of zt, where t is the time corresponding to one pixel in the horizontal direction, the delay circuits provided for an image signal line of a sample circuit to which is supplied an image signal having a plurality of frames each constituted by y fields, which has y switches, said method of driving an image display apparatus comprising the steps of:

transmitting from each delay circuit a through signal and a delay signal delayed from the through signal by the respective delay quantity; and

sequentially changing over the y switches to change over between the delay signal and the through signal transmitted from each of said delay circuits at a period of y lines at each field.

3. A method of driving an image display apparatus including a pixel matrix having a plurality of lines of pixels, wherein each pixel on an n-th line and a corresponding pixel on an n+1-th line are connected to a same signal line, and wherein each pixel on the n+1-th line is arranged with a horizontal deviation of Z pixels with respect to the corresponding pixel on the n-th line, said method comprising the steps of:

sampling an image signal to provide a first sample and inputting the first sample to a first pixel on the n-th line; and

sampling the image signal to provide a second sample and inputting the second sample to a corresponding second pixel on the n+1-th line connected to the same signal line as the first pixel with a time delay of Z pixels relative to the first sample.

4. A method of driving an image display apparatus according to claim 3, wherein said image display apparatus is a liquid crystal display apparatus.

5. A method of driving an image display apparatus according to claim 3, wherein pixels connected to the same signal line are pixels of a same color.

6. A method of driving an image display apparatus according to claim 3, wherein pixels connected to the same signal line are pixels of different colors.

7. A method of driving an image display apparatus having a plurality of horizontal lines of pixels, in which pixels on an n+1-th line are deviated from pixels on an n-th line by a deviation of z pixels in the horizontal direction, the deviation of said pixels in the horizontal direction being periodic with a period of y lines, where y is two or more, and which has y-1 delay circuits each having a respective delay quantity that is a respective integral multiple of zt, where t is a time corresponding to one pixel in the horizontal direction, the delay circuits being provided for an image signal line of a sampling circuit thereof, and which has a switch, said method of driving an image display apparatus comprising the steps of:

transmitting from each delay circuit a through signal and a delay signal delayed from the through signal by the delay quantity; and

changing over the switch to sequentially change over between the delay signal and the through signal transmitted from each of said delay circuits.

8. A method of driving an image display apparatus having a plurality of horizontal lines of pixels, in which pixels on an n+1-th line are deviated from pixels on an n-th line by a deviation of z pixels in the horizontal direction, the deviation of said pixels in the horizontal direction being periodic with a period of y lines, where y is two or more, and which has y-1 delay circuits each having a respective delay quantity that is a respective integral multiple of zt, where t is the time corresponding to one pixel in the horizontal direction, the delay circuits provided for an image signal line of a sample circuit to which is supplied an image signal having a plurality of frames each constituted by y fields, which has a switch, said method of driving an image display apparatus comprising the steps of:

transmitting from each delay circuit a through signal and a delay signal delayed from the through signal by the respective delay quantity; and

changing over the switch to sequentially change over between the delay signal and the through signal transmitted from each of said delay circuits.