Einzeltreffer — DigiBib

In the present invention, during a 1H period excluding a blanking period (1HB) constituting a line display period, pixel data pulses of RGB (61B to 61R) are successively supplied for each color to corresponding signal lines for color display of one pixel line. A control circuit (40) of select switches connected to the signal lines (6-1 to 6-n) supplies permission pulses (63B to 63R) for supply of data to signal lines when displaying one color among RGB to select switches (TMG), and turns on the select switch (TMG) of the signal line corresponding to another color to be displayed later in the same line display period during the period of this application by a precharge pulse (62G or 62R) having a time duration shorter than the supply time of the pixel data of the other color (T2 or T3) to previously precharge the signal line of the other color to the predetermined potential. Due to this, sufficient precharging of a signal line which became difficult due to an increase of a load capacitance of the signal line due to higher definition of the image display device and increase in speed of a drive clock thereof can be achieved.

Titel:	Image Display Device, Image Display Panel, Panel Drive Device, and Method of Driving Image Display Panel
Autor/in / Beteiligte Person:	Itakura, Naoyuki ; Ichikawa, Hiroaki ; Maekawa, Toshikazu
Link:	Zum Volltext
Veröffentlichung:	2008
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Applications Sprachen: English Document Number: 20080136810 Publication Date: June 12, 2008 Appl. No: 10/568538 Application Filed: August 20, 2004 Assignees: Sony Corporation (Tokyo, JP) Claim: 1. An image display device having a group of pixels arranged in a matrix in a predetermined array and assigned to three primary colors, and having a signal line connected for each column of the group of pixels, wherein pixel data of three primary colors are successively supplied for each color to a corresponding signal line during a period excluding a blanking period of one horizontal scanning period constituted by a line display period for the color display of one pixel line, and wherein a select switch is connected to each of the signal lines, and a precharging control circuit is connected to the select switch, the precharging control circuit supplies permission pulses for the supply of data to signal lines when making them display one color among three primary colors in the line display period to the select switch of the corresponding signal line to turn the same on, turns on the select switch of the signal line corresponding to another color to be displayed later in the same line display period during a period of supply of permission pulses of the supply of data with a precharge pulse having a time duration shorter than the supply time of the pixel data of the other color, and precharges the signal line of the other color in advance to a predetermined potential. Claim: 2. An image display device as set forth in claim 1, wherein the precharging control circuit changes the time duration or number of the precharge pulses to increase the time of the precharge the shorter the time duration of the permission pulse for the supply of data and the later the display of the color in the line display period. Claim: 3. An image display device as set forth in claim 1, wherein the precharging control circuit supplies the precharge pulse for the precharge in the blanking period located in the head portion of one horizontal scanning period to the signal line corresponding to the color to be displayed first during the line display period. Claim: 4. An image display panel having a group of pixels arranged in a matrix in a predetermined array and assigned to three primary colors, and having a signal line connected for each column of the group of pixels, wherein pixel data of three primary colors are successively supplied for each color to a corresponding signal line during a period excluding a blanking period of one horizontal scanning period constituted by a line display period for the color display of one pixel line, and wherein the image display panel is provided with a precharging control circuit, and the precharging control circuit is connected to a select switch connected to each of the signal lines, supplies permission pulses for the supply of data to signal lines when making them display one color among three primary colors in the line display period to the select switch of the corresponding signal line to turn the same on, turns on the select switch of the signal line corresponding to another color to be displayed later in the same line display period during a period of supply of permission pulses of the supply of data with a precharge pulse having a time duration shorter than the supply time of the pixel data of the other color, and precharges the signal line of the other color in advance to a predetermined potential. Claim: 5. A panel drive device for successively supplying pixel data of three primary colors for each color to a corresponding signal line of an image display panel having a group of pixels arranged in a matrix in a predetermined array and assigned to three primary colors and having the signal line connected for each column of the group of pixels during a period excluding a blanking period of one horizontal scanning period constituted by a line display period at the time of driving each pixel line, the panel drive device having a built-in precharging control circuit, and wherein the precharging control circuit is connected to a select switch connected to each of the signal lines, supplies permission pulses for the supply of data to signal lines when displaying one color among three primary colors in the line display period to the select switch of the corresponding signal line to turn the same on, turns on the select switch of the signal line corresponding to another color to be displayed later in the same line display period during a period of supply of permission pulses of the supply of data with a precharge pulse having a time duration shorter than the supply time of the pixel data of the other color, and precharges the signal line of the other color in advance to a predetermined potential. Claim: 6. A method of driving an image display panel for successively supplying pixel data of three primary colors for each color to a corresponding signal line of an image display panel having a group of pixels arranged in a matrix in a predetermined array and assigned to three primary colors and having the signal line connected for each column of the group of pixels during a period excluding a blanking period of one horizontal scanning period constituted by a line display period for color display for each pixel line, comprising supplying permission pulses for the supply of data to signal lines when making them display one color among three primary colors in the line display period to the select switch of the corresponding signal line to turn the same on and turning on the select switch of the signal line corresponding to another color to be displayed later in the same line display period during a period of supply of permission pulses of the supply of data with a precharge pulse having a time duration shorter than the supply time of the pixel data of the other color so as to precharge the signal line of the other color in advance to a predetermined potential. Claim: 7. A method of driving an image display panel as set forth in claim 6, further comprising changing the time duration or number of the precharge pulses to increase the time of the precharge the shorter the time duration of the permission pulse for the supply of data and the later the display of the color in the line display period. Claim: 8. A method of driving an image display panel as set forth in claim 6, further comprising supplying the precharge pulse for the precharge in the blanking period located in the head portion of one horizontal scanning period to the signal line corresponding to the color to be displayed first during the line display period. Current U.S. Class: 345/215 Current International Class: 06

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Image Display Device, Image Display Panel, Panel Drive Device, and Method of Driving Image Display Panel