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Liquid crystal display device, liquid crystal display device drive method, and television receiver

A technology of liquid crystal display device and display part, which is applied to static indicators, instruments, etc., which can solve the problems of decreased pixel charging rate, increased power consumption, and higher polarity inversion frequency, etc., and achieves the suppression of stripe-like unevenness , The effect of reducing the difference in charge rate

Inactive Publication Date: 2011-10-19
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the dot inversion driving, the polarity inversion frequency of the data signal line becomes high, and there is a problem that the pixel charging rate decreases and the power consumption increases. Therefore, a block inversion as described in Patent Document 1, for example, has been proposed. Drive that inverts the polarity of the signal potential supplied to the data signal line in multiple horizontal scanning periods

Method used

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  • Liquid crystal display device, liquid crystal display device drive method, and television receiver
  • Liquid crystal display device, liquid crystal display device drive method, and television receiver
  • Liquid crystal display device, liquid crystal display device drive method, and television receiver

Examples

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Embodiment approach 1

[0068] In this embodiment, if figure 1 , figure 2 As shown, the scanning signal lines are interlaced while performing block inversion driving on the data signal lines. First, it is considered that the part after the scanning signal line G1 in the display unit is divided into 45 blocks ( B1 to B45 ) divided by 44 boundaries parallel to the scanning signal lines. Each block contains 24 consecutive scanning signal lines. For example, block B1, which is the most upstream block, contains scanning signal lines G1-G24, block B2 contains scanning signal lines G25-G48, and block B3 contains There are scanning signal lines G49 to G72, and the block B45 which is the most downstream block includes scanning signal lines G1057 to G1080.

[0069] Then, the odd-numbered 12 scanning signal lines (G1, G3...G23) included in the block B1 that is the most upstream block are set as the first group Gr1, and the first group Gr1 included in the block B1 and its downstream block B2 The even-number...

Embodiment approach 2

[0126] In this embodiment, if Figure 23 , Figure 24 As shown, the scanning signal lines are sequentially scanned while performing block inversion driving on the data signal lines. First, it is considered that the part after the scanning signal line G1 in the display unit is divided into 90 blocks ( B1 to B90 ) divided by 89 boundaries parallel to the scanning signal lines. Each block contains 12 consecutive scanning signal lines. For example, block B1, which is the most upstream block, contains scanning signal lines G1 to G12, block B2 contains scanning signal lines G13 to G24, and block B3 contains scanning signal lines. The scanning signal lines G25 to G36 are included in the block B90, which is the most downstream block, and the scanning signal lines G1069 to G1080 are included in the block B90.

[0127] Then, the 12 scanning signal lines (G1, G2 . G13, G14...G24) is set as group Gr2, below, the 12 scanning signal lines contained in each block are set as groups Gr3~Gr9...

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Abstract

Provided is a liquid crystal display device including a display unit having scan signal lines divided into a plurality of groups (Gr1, Gr2, ...) which are successively selected. While the scan signal lines belonging to the selected group are successively scanned horizontally, signal potentials of the same polarity are successively supplied to a data signal line. The polarity of the signal potential is reversed between a preceding group and a subsequent group which are selected continuously. A plurality (n) of dummy scan periods (periods Da, Db, ...) are inserted between the horizontal scan period corresponding to the last horizontal scan in the preceding group and the horizontal scan period corresponding to the first horizontal scan in the subsequent group. In each of the dummy scan periods, one of the scan signal lines which belong to the group selected after the preceding group is subjected to a dummy scan so that the scan signal line is maintained in an active state for a predetermined period and then deactivated so as to align the load state of a scan signal line drive circuit. This can reduce irregularities of the horizontal stripes when the data signal line is subjected to the block reverse drive.

Description

technical field [0001] The present invention relates to driving (block inversion driving) in which the polarity of a signal potential supplied to a data signal line is inverted for each horizontal scanning period. Background technique [0002] Liquid crystal display devices have excellent features such as high definition, thin profile, light weight, and low power consumption. In recent years, their market scale has been rapidly expanding. Dot inversion driving, which inverts the polarity of a signal potential supplied to a data signal line every horizontal scanning period, is widely used in this liquid crystal display device. However, in the dot inversion driving, the polarity inversion frequency of the data signal line becomes high, and there is a problem that the pixel charging rate decreases and the power consumption increases. Therefore, a block inversion as described in Patent Document 1, for example, has been proposed. driving for inverting the polarity of the signal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G02F1/133G09G3/20
CPCG09G3/3614G09G3/3648G09G2310/0218G09G2310/0251
Inventor 下敷领文一川端雅江
Owner SHARP KK
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