Display device, method of laying out light emitting elements, and electronic device

Abstract

Disclosed herein is a display device in which light emitting elements of a plurality of colors including a light emitting element emitting blue light are formed in each pixel on a substrate on which a transistor is formed for each sub-pixel, and a plurality of pixels formed with sub-pixels of the plurality of colors as a unit are arranged in a form of a matrix, wherein relative positional relation between transistors of sub-pixels of respective light emission colors including blue light and a light emitting section of a light emitting element emitting the blue light is laid out such that distances between the transistors of the sub-pixels of the respective light emission colors including the blue light and the light emitting section of the light emitting element emitting the blue light are equal to each other for the respective colors.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a display device, a method of laying out light emitting elements, and an electronic device, and particularly to a flat-panel type display device in which pixels are arranged two-dimensionally in the form of a matrix, a method of laying out light emitting elements in the display device, and an electronic device having the display device.[0003]2. Description of the Related Art[0004]Recently, flat-panel type display devices in which pixels (pixel circuits) are arranged in the form of a matrix have spread rapidly in a field of display devices displaying images. As one of the flat-panel type display devices, there is a display device using a current-driven type electrooptic element whose light emission luminance changes according to the value of a current flowing through the device as light emitting elements of pixels. As a current-driven type electrooptic element, an organic EL (Electro Lumi...

AI Technical Summary

Benefits of technology

[0018]Therefore, when the pixel transistor of the adjacent pixel of R, for example, is irradiated with a part of the blue light emitted by the organic EL element of B, the characteristics of the pixel transistor of R change more greatly than when the pixel transistor of R is not irradiated. Because of the variation in the characteristics of the pixel transistor, as shown in FIG. 21, the current ratio at a time of emission of the blue light of the organic EL element emitting red light is lower than at a time of non-emission of the blue light.

[0021]Incidentally, for example a measure of adopting a leakage light preventing structure using a rib or the like may be taken to avoid the effect of light emitted by an adjacent pixel. However, the provision of a leakage light preventing structure complicates a device structure.

[0022]It is accordingly desirable to provide a display device that can reduce variations in changes in the characteristics of the pixel transistor from color to color due to the effect of leakage light from an adjacent pixel, a method of laying out light emitting elements in the display device, and an electronic device using the display device.

[0029]According to the present invention, variations in changes in characteristics of the pixel transistor from color to color due to the effect of leakage light from an adjacent pixel can be reduced. Thereby, a white balance can be maintained without depending on an image being displayed, so that a display image of excellent display quality can be obtained.

Problems solved by technology

The organic EL element can be driven by an application voltage of 10 V or lower, and thus consumes low power.

However, while having a simple structure, a simple matrix type display device presents for example a problem of difficulty in realizing a large and high-definition display device because the emission period of an electrooptic element is reduced by an increase in the number of scanning lines (that is, the number of pixels).

As a result, screen uniformity is impaired.

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