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Display device and electronic equipment

A technology for a display device and a white color filter, applied in lighting devices, circuits, electric light sources, etc., can solve the problems of impossible to prevent the change of the color of the reflected light, the change of the color of the reflected light, etc.

Active Publication Date: 2019-06-07
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is impossible to prevent the change of the color of the reflected light in this method, and then there is still a problem of the change of the hue of the reflected light

Method used

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  • Display device and electronic equipment
  • Display device and electronic equipment
  • Display device and electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0053] 1.1. Structure example of organic EL panel

[0054] 1.2. Absolute reflectance of external light reflection and color of reflected light

[0055] 1.3. Hue control by adding colorants

[0056] 1.4. Allowable range of color change

[0057] 2. The second embodiment

no. 5 example

[0061]

[0062] 1.1. Structure example of organic EL panel

[0063] figure 1 is a cross-sectional view illustrating an organic EL panel 1000 according to an embodiment of the present invention. Note that the following description is made by taking the organic EL panel 1000 as an example, but the embodiment of the present invention is applicable not only to the organic EL panel 1000 but also to a liquid crystal display panel (LCD). Such as figure 1 As shown, the organic EL panel 1000 includes a glass plate 100 , a color filter 200 , a resin layer 300 , a protective layer 400 , a transparent electrode 500 , an organic EL element 600 and a metal electrode 700 in sequence from the uppermost layer. The color filter 200 includes a red (R) color filter 200R, a green (G) color filter 200G, a blue (B) color filter 200B, and a white (W) color filter 200W. Color filters 200R, 200G, 200B, and 200W are arranged to correspond to red, green, blue, and white pixels, respectively.

[006...

no. 2 example

[0096] Next, a second embodiment of the present invention will be described. In the second embodiment, the brightness of the white pixels of the organic EL panel 1000 is adjusted by reducing the aperture ratio of the white pixels. This makes it possible to reduce external light reflection.

[0097] Figure 20 It is shown that the respective aperture ratios of the red pixel, the green pixel, and the blue pixel are fixed at 32%, and the aperture ratio of the colorless and transparent white pixel (ND transmittance 100%) is set to 100%, Characteristic graph of xy chromaticity for external light reflection at 80%, 60%, 40%, 20%, and 0%. Similarly, Figure 21 It is shown that the respective aperture ratios of the red pixel, green pixel, and blue pixel are fixed at 32%, and the aperture ratio ratio of the colorless and transparent white pixel (ND transmittance 100%) is set to 100%, Characteristic graph of absolute reflectance at 80%, 60%, 40%, 20%, and 0%. Here, the aperture rat...

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Abstract

The present invention provides a display device, which includes light-emitting elements corresponding to pixels of each color and white color filters corresponding to white pixels. The transmittance of the white color filter is based on a uniform neutral density (ND) transmittance in the entire wavelength band of visible light, and the transmittance in a specific wavelength band in the entire wavelength band of visible light is reduced to below the ND transmittance. According to the present invention, it is possible to minimize external light reflection in a display device and ideally control the color of reflected external light.

Description

technical field [0001] The present invention relates to display devices and electronic equipment. Background technique [0002] Recently, display devices respectively for displaying video and including light emitting elements of organic electroluminescence (EL) have been used. Since a large amount of reflected external light deteriorates display quality in such a display device, it is preferable to reduce external light reflection. Generally, external light reflection components of a display panel are mainly divided into two types. One is a component of Fresnel reflection that occurs at the interface between the outermost part of the panel and the air, and the other is a component of reflection where light enters and then exits the panel. [0003] Typical organic EL panels each have a light emitter formed by stacking transparent electrodes, an organic light emitting layer, and a metal electrode on a transparent substrate. For this reason, light entering the organic EL pan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32H05B33/12H01L51/50G02B5/20G02B5/22
CPCG02F1/133514H10K59/351H10K59/38H10K59/8791H10K50/86
Inventor 铃木守卢星煕中村雅人甚田诚一郎泉岳寺口晋一
Owner SONY CORP
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