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Field sequential image display device and image display method

An image display device and field sequence technology, applied to static indicators, nonlinear optics, instruments, etc., can solve the problems of insufficient distribution ratio and unreliable suppression of color chaos, so as to suppress color chaos, improve color reproducibility, The effect of cutting calories

Active Publication Date: 2021-05-04
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In addition, in the image display device of the above-mentioned field sequential method, depending on the image to be displayed, color breakup cannot be reliably suppressed due to an insufficient allocation ratio for white subframes in the conversion from input image data to driving image data. Case

Method used

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  • Field sequential image display device and image display method
  • Field sequential image display device and image display method
  • Field sequential image display device and image display method

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no. 1 approach ＞

[0123]

[0124] figure 1 It is a block diagram showing the configuration of the image display device of the first embodiment. figure 1 The illustrated image display device 1 includes an image data conversion unit 10 and a display unit 20 . The image data conversion unit 10 includes a parameter storage unit 11 , a statistical value / saturation calculation unit 12 , a distribution ratio / coefficient calculation unit 13 , and a driving image data calculation unit 33 . The display unit 20 includes a timing control circuit 21 , a panel drive circuit 22 , a backlight drive circuit 23 , a liquid crystal panel 24 as a light modulation unit, and a backlight 25 as a light source unit.

[0125] The image display device 1 is a field sequential liquid crystal display device. The image display device 1 divides one frame period into a plurality of subframe periods, and displays subframes of different colors in each subframe period. The following image display device 1 is configured to d...

no. 2 approach ＞

[0251]

[0252] Figure 14 It is a block diagram showing the configuration of the image display device of the second embodiment. Figure 14 The illustrated image display device 3 includes an image data conversion unit 30 and a display unit 40 . In the image data conversion unit 30 of the first embodiment, the distribution ratio / coefficient calculation unit 13 is replaced by the distribution ratio / coefficient calculation unit 32 , and the parameter storage unit 11 is replaced by the parameter storage unit 31 . Differences from the first embodiment will be described below.

[0253] The image display device of the present embodiment selectively performs low-brightness part noise countermeasure processing, and further selectively performs high-brightness part noise countermeasure processing. In the image display device of the present embodiment, the parameter storage unit 31 stores not only parameters WRX, RA, RB, and WBR but also parameters NR, GL, RC, WRY, WRZ0, and WRZ1. T...

no. 3 approach ＞

[0337] Figure 26 It is a block diagram showing the configuration of the image display device of the third embodiment. Figure 26 The illustrated image display device 5 includes an image data conversion unit 50 and a display unit 60 . The image data conversion unit 50 is configured by adding a parameter selection unit 52 to the image data conversion unit 30 of the second embodiment, and replacing the parameter storage unit 31 with the parameter storage unit 51 . The display unit 60 is configured by adding the temperature sensor 61 to the display unit 40 of the second embodiment. Differences from the first embodiment will be described below.

[0338] The temperature sensor 61 is included in the display unit 60 and measures the temperature T of the display unit 60 . The temperature sensor 61 is provided near the liquid crystal panel 24, for example. The temperature T measured by the temperature sensor 61 is input to the parameter selection unit 52 .

[0339] The parameter s...

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Abstract

The present invention provides a field sequential image display device and an image display method that more reliably suppress color breakup while sufficiently performing image display with high color reproducibility in the field sequential method. In a field-sequential liquid crystal display device in which each frame is constituted by a plurality of subframes composed of red, green, blue, and white (common colors) subframes, the image data conversion unit (30) is based on the adjustment coefficient (Ks) and The subframe allocation ratio (WRs) converts the input image data (D1) corresponding to red, green, and blue into driving image data (D2) corresponding to the plurality of subframes for each pixel. Alternatively using two distribution ratios as the distribution ratio (WRs), the function for calculating the second distribution ratio (WRsv2) is set so that the higher the adjusted brightness (brightness after enlargement and compression processing) (V) of the input image is, The smaller the distribution ratio (WRsv2) is, the larger it is.

Description

technical field [0001] The present invention relates to an image display device, and more specifically, relates to a field sequential image display device and an image display method. Background technique [0002] Conventionally, there is known a field sequential image display device that displays a plurality of sub-frames within one frame period. For example, a typical field sequential image display device has a backlight including red, green and blue light sources, and displays red, green and blue sub-frames within one frame period. When displaying the red sub-frame, the display panel is driven based on the red image data, and the red light source emits light. Then, the green subframe and the blue subframe are displayed in the same way. The three sub-frames displayed in time-sharing are synthesized on the observer's retina through afterimage phenomenon, and are recognized as a color image by the observer. [0003] In a field sequential image display device, when the vie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G02F1/133G09G3/20G09G3/34
CPCG02F1/133G09G3/3607G09G3/3413G09G2320/0626G09G2320/0666G09G2310/0235G09G2340/06G09G3/3648G09G3/34G09G3/20G09G3/36
Inventor 小林正益
Owner SHARP KK
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