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Display device and display method thereof

A technology for a display device and a display part, which is applied to static indicators, instruments, etc., can solve the problems of reduced brightness and reduced transmittance, and achieve the effect of good color reproducibility

Inactive Publication Date: 2012-11-28
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, if the color of the color filter is darkened in order to expand the color reproduction range, the brightness decreases due to the decrease in transmittance.

Method used

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  • Display device and display method thereof
  • Display device and display method thereof
  • Display device and display method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0077]

[0078] figure 1 It is a block diagram showing the overall configuration of the liquid crystal display device according to Embodiment 1 of the present invention. This liquid crystal display device has a gradation signal generating unit 100, a display unit (display panel) 200, a source driver (video signal line driving circuit) 300, a gate driver (scanning signal line driving circuit) 400, an extraneous light detecting unit 500 and Switch control circuit 600 .

[0079] The display unit 200 includes: multiple (n) source bus lines (video signal lines) SL1˜SLn; multiple (m) gate bus lines (scanning signal lines) GL1˜GLm; A plurality of (n×m) pixel forming portions provided at intersections of SL1 to SLn and a plurality of gate bus lines GL1 to GLm. These pixel forming portions are arranged in a matrix to form a pixel array. In addition, each pixel forming portion forms one of predetermined colors of R (red), G (green), B (blue), or W (white). That is, in this embodi...

example 1

[0125] In Embodiment 1 described above, when the second display mode is performed, the RGBW image signal used for image display is generated by referring to the gradation value determination table 150 in the gradation value conversion unit 140 . However, the present invention is not limited thereto. In a liquid crystal display device having RGBW four-color sub-pixels, the grayscale value indicated by the digital image signal DA transmitted from the outside may be used as it is for the three primary colors of RGB as the grayscale value at the time of image display. In this case, it is not necessary for the gradation value conversion unit 140 to generate an image signal for the three colors of RGB among the four colors of RGBW. Therefore, the structure between the second output terminal group 122 of the output selection circuit 120 and the second input terminal group 162 of the input selection circuit 160 can also be adopted Figure 7 structure shown. In this configuration, th...

example 2

[0127] In addition, in the first embodiment described above, when performing the second display mode, the gradation value determination table referred to by the gradation value conversion unit 140 is only one, but the present invention is not limited to this. E.g Figure 9 As shown, a structure in which three tables (the first grayscale value determination table 152, the second grayscale value determination table 153, and the third grayscale value determination table 154) are referred to by the grayscale value conversion unit 142 may also be employed. . In addition, in this configuration, in order to determine the table to be referred to by the gradation value converting unit 142 , a 2-bit display mode selection signal S is supplied to the gradation value converting unit 142 . At this time, it is only necessary to set the value of each bit of the display mode selection signal S according to the intensity of the external light, for example Figure 10 shown. Therefore, the ou...

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Abstract

An object of the present invention is to provide a display device that achieves a balance between color reproducibility and luminance under the premise that the display device uses a display panel in which each pixel is configured by sub-pixels of four or more colors. An outside light detecting unit (500) outputs a current Ia according to the intensity of outside light. A switching control circuit (600) outputs a display mode selection signal (S) for selecting a display mode, based on the magnitude of the current (Ia). An output selection circuit (120) provides RGB image signals to an input selection circuit (160) when in a first display mode (when it is dark) and provides RGB image signals to a gray scale value converting unit (140) when in a second display mode (when it is bright). In the first display mode, a W image signal generated by a black signal generation circuit (130) is used as a gray scale signal (DV). In the second display mode, a W image signal generated by the gray scale value converting unit (140) referring to a gray scale value determination table (150) is used as a gray scale signal (DV).

Description

technical field [0001] The present invention relates to a display device, and more specifically, to a display device having a display panel in which each pixel is composed of sub-pixels of four or more colors. Background technique [0002] Conventionally, in liquid crystal display devices, three-color color filters of red, green, and blue (RGB) are used for color image display. In such a liquid crystal display device, such as Figure 15 As shown in (A), one pixel is constituted by pixels of three colors of red, green, and blue (referred to as “sub-pixels” respectively). By adjusting the transmittance for each of these sub-pixels, a desired color is displayed in each pixel. With regard to such liquid crystal display devices, there has been an increasing demand for expanding the range of color reproduction (enhancing color reproducibility) in recent years. In addition, liquid crystal display devices such as portable electronic devices are increasingly used outdoors. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G02F1/133G09G3/20
CPCG09G3/3648G09G2320/0242G09G2340/06G09G2360/144
Inventor 吉田圭介中岛睦
Owner SHARP KK
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