Display unit and electronic apparatus

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Quick Facts

Patent No.: US 9,123,669
App. No.: 14/346,922
Granted: Sep 1, 2015
Kind: B2

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Abstract

A display unit is provided. The display unit includes a plurality of pixels having first to third sub-pixels each of which corresponds to respective colors of red, green, and blue, and a fourth sub-pixel exhibiting higher luminance than the first to third sub-pixels. In each of the pixels, the first to fourth sub-pixels have light-emitting devices. In the first to third sub-pixels, color filters are provided, and in the fourth sub-pixel, the transmittance of light emitted from the light-emitting device is configured to be reduced at a partial or whole region of the fourth sub-pixel. A difference in the transmittance among the first to third sub-pixels having the color filters and the fourth sub-pixel having no color filter is reduced to ensure an excellent luminance balance, which makes it easy to represent desired chromaticity.

Claims (59)

1. A display unit, comprising:

a plurality of pixels having first to third sub-pixels each of which corresponds to respective colors of red (R), green (G), and blue (B), and a fourth sub-pixel exhibiting higher luminance than the first to third sub-pixels,

wherein in each of the plurality of pixels,

the first to fourth sub-pixels have light-emitting devices between a pair of substrates that are arranged in opposition to each other, and

the first to third sub-pixels are provided with color filters that selectively transmit corresponding color light therethrough on the side of one substrate of a pair of the substrates, and

in the fourth sub-pixel, the transmittance of light emitted from the light-emitting device is configured to be reduced at a partial or whole region of the fourth sub-pixel;

wherein a pair of the substrates are a driving substrate having a pixel driving circuit and a sealing substrate that is configured of a transparent substrate, and

the color filters are provided on the side of the sealing substrate;

further comprising a black matrix having apertures in opposition to the first to fourth sub-pixels, wherein

the color filter is provided at each of apertures facing the first to third sub-pixels on the black matrix, and

a neutral density filter is provided at an aperture facing the fourth sub-pixel on the black matrix:

wherein the transmittance of the neutral density filter is configured to be lower at an end region than at a central region.

2. The display unit according to claim 1 , further comprising a black matrix having apertures in opposition to the first to fourth sub-pixels, wherein

the color filter is provided at each of apertures facing the first to third sub-pixels on the black matrix, and

in the fourth sub-pixel, an aperture width of the black matrix is smaller than each of aperture widths in the first to third sub-pixels.

3. The display unit according to claim 1 , wherein in the black matrix,

each of apertures facing the first to third sub-pixels takes a rectangular shape, and

an aperture facing the fourth sub-pixel takes a circular shape, an elliptic shape, or an n-polygonal shape (n is an integer of 5 or more).

4. The display unit according to claim 1 , wherein each of the first to fourth sub-pixels has a pixel electrode in the shape identical to each other on the driving substrate, and

a shape of each aperture of the black matrix is larger in size than a planar shape parallel to a substrate surface of the pixel electrode.

5. The display unit according to claim 1 , wherein in each of the first to third sub-pixels, each aperture width is set up for each of transmission wavelengths thereof.

6. The display unit according to claim 5 , wherein each aperture width in the first to third sub-pixels is set up in consideration of a density of the color filter.

7. The display unit according to claim 1 , wherein the plurality of pixels are arrayed two-dimensionally along two orthogonal directions, and

in one selective direction of these two directions, an aperture width in the fourth sub-pixel is smaller than each of aperture widths in the first to third sub-pixels.

8. The display unit according to claim 1 , wherein the transmittance of the neutral density filter is set up to be equivalent to the transmittance at a transmission band in each of the color filters of the first to third sub-pixels.

9. A display unit, comprising:

wherein in each of the plurality of pixels,

the first to fourth sub-pixels have light-emitting devices between a pair of substrates that are arranged in opposition to each other, and

the first to third sub-pixels are provided with color filters that selectively transmit corresponding color light therethrough on the side of one substrate of a pair of the substrates, and

in the fourth sub-pixel, the transmittance of light emitted from the light-emitting device is configured to be reduced at a partial or whole region of the fourth sub-pixel;

wherein a pair of the substrates are a driving substrate having a pixel driving circuit and a sealing substrate that is configured of a transparent substrate, and

the color filters are provided on the side of the sealing substrate

further comprising a black matrix having apertures in opposition to the first to fourth sub-pixels, wherein

the color filter is provided at each of apertures facing the first to third sub-pixels on the black matrix, and

a neutral density filter is provided at an aperture facing the fourth sub-pixel on the black matrix; and

wherein the transmittance of the neutral density filter is configured to be reduced in incremental steps from a central region toward an end region.

10. A display unit, comprising: