Driving module and driving method for avoiding charging inequality

• US 9,196,210 B2
• Filed: 06/10/2010
• Issued: 11/24/2015
• Est. Priority Date: 05/13/2010
• Status: Active Grant

• Current Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Original Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Inventors: Chang, Yu-Pin, Hsia, Chih-Peng, Yu, Tsung-Yin
• Primary Examiner(s): Yodichkas, Aneeta
• Assistant Examiner(s): FOX, JOSEPH PATRICK
• Application Number:
  US12/797,609
• Publication Number:
  US 20110279443A1
• Time in Patent Office: 1,993 Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2310/0251 Precharge or discharge of pixel before applying new pixel voltage
• CPC Class Codes: G09G 2310/0283 Arrangement of drivers for different directions of scanning
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3688 suitable for active matrices only

Abstract

The present invention discloses a driving module for a liquid crystal display device. The driving module includes a data line signal processing unit, for generating a plurality of data driving signals, a scan line signal processing unit, for generating a plurality of gate driving signals, and a control unit, for controlling the data line signal processing unit and the gate line signal processing unit, such that a plurality of sub-pixels corresponding to a data line are with different charging orders in different frames, or are charged with different charging periods in a same frame.

Claims

1. A driving module for a liquid crystal display (LCD) device, each pixel of the LCD device comprising a plurality of subpixels corresponding to a data line, the driving module comprising:

a data line signal processing unit, for generating a plurality of data driving signals;

a scan line signal processing unit, for generating a plurality of gate driving signals; and

a control unit, for controlling the data line signal processing unit and the scan line signal processing unit to charge the plurality of subpixels within a pixel of the LCD device corresponding to the data line with different charging orders in different frames via signal control;

wherein the plurality of subpixels within the pixel are charged during a first frame and a second frame, and the plurality of subpixels within the pixel are not charged in a same sequence during the first frame as the plurality of subpixels within the pixel are charged during the second frame, and the first frame and the second frame are consecutive frames;

wherein the control unit is further utilized for controlling the data line signal processing unit and the scan line signal processing unit, to charge the plurality of subpixels within the pixel corresponding to the data line with reverse charging orders in two adjacent frames, and the plurality of subpixels within the pixel comprises a red (R) subpixel, a green (G) subpixel and a blue (B) subpixel, each set of RGB subpixels of the plurality of subpixels within the pixel is charged with the reverse charging orders in the two adjacent frames and is charged with only one of the reverse charging orders in each frame, and the reverse charging orders are one of RGB/BGR reverse ordering, GRB/BRG reverse ordering and RBG/GBR reverse ordering;

wherein the two reverse charging orders comprise a first forward charging order corresponding to scanning the each set of RGB subpixels within the pixel in only a left to right direction in the entire first frame, and a second reverse charging order corresponding to scanning the each set of RGB subpixels within the pixel in only a right to left direction in the entire second frame.

2. A driving method for a liquid crystal display (LCD) device, each pixel of the LCD device comprising a plurality of subpixels corresponding to a data line, the driving method comprising the steps of:

providing a plurality of data driving signals; and

providing a plurality of gate driving signals, and charging the plurality of subpixels within a pixel of the LCD device corresponding to the data line with different charging orders in different frames via signal control according to the plurality of data driving signals and the plurality of gate driving signals; and

charging the plurality of subpixels within the pixel corresponding to the data line with two reverse charging orders in two adjacent frames according to the plurality of data driving signals and the plurality of gate driving signals, wherein the plurality of subpixels within the pixel comprises a red (R) subpixel, a green (G) subpixel and a blue (B) subpixel, each set of RGB subpixels of the plurality of subpixels within the pixel is charged with the two reverse charging orders in the two adjacent frames and is charged with only one of the two reverse charging orders in each frame, and the two reverse charging orders are one of RGB/BGR reverse ordering, GRB/BRG reverse ordering and RBG/GBR reverse ordering;

wherein the plurality of subpixels within the pixel are charged during a first frame and a second frame, and the plurality of subpixels within the pixel are not charged in a same sequence during the first frame as the plurality of subpixels within the pixel are charged during the second frame, and the first frame and the second frame are consecutive frames;

wherein the two reverse charging orders comprise a first forward charging order corresponding to scanning the each set of RGB subpixels within the pixel in only a left to right direction in the entire first frame, and a second reverse charging order corresponding to scanning the each set of RGB subpixels within the pixel in only a right to left direction in the entire second frame.