JPH0351877A - Shader for improving contrast and color mixing of light emitting element - Google Patents

Abstract

PURPOSE:To prevent external light from being incident on the light emission surface of the light emitting element from all slanting azimuth directions, to stabilize the contrast of an image, and to improve the color mixing of color light emission by surrounding the inside and outside of the flank of the light emitting element with the shader which is formed in a spiral shape. CONSTITUTION:A picture element 4 is constituted in primary color units by using four light emitting elements 6 and picture elements 5 which are many enough to form a color image are arrayed longitudinally and laterally on the plane of a panel 7. Then the shader 8 which covers the flank of each picture element 5 is formed spirally. The spiral shape of the shader 8 is formed continuously so as to surround the inside and outside of the flanks of light emitting elements 6 constituting one picture element 5 and the shader is fitted on the plane of the panel 7. Consequently, the external light in all slanting azimuth directions is prevented from being incident on the light emitting surfaces of the light emitting elements, the contrast of the image is stabilized, and the color mixing of the color light emission is improved.

Description

[Detailed Description of the Invention] [Summary] Regarding a shader for improving contrast and color mixture of light emitting elements that can prevent external light from entering light emitting elements constituting a pixel, external light is directly directed in front of the light emitting elements from the peripheral direction. The purpose of this shader is to provide a shader that can significantly prevent light from entering the screen, stabilize the contrast of images, and improve the color mixture of color luminescence. The light emitting element is formed in a shape corresponding to a pixel, or is provided at a position surrounding the side surface of the light emitting element so that the front surface thereof has a spiral shape.

[Industrial Application Field] The present invention relates to a color image device configured by arranging a large number of pixels on a plane, and more specifically, to a color image device configured to prevent external light from entering light emitting elements constituting the pixels. The present invention relates to a shader for improving contrast and color mixture of light emitting devices.

[Conventional technology]

The pixels of a color image device, which forms an image by arranging a large number of elements on a plane, are generally constructed using light sources of three primary colors.

The pixels are constructed using, for example, CRT type light emitting elements, and red (R) is used as the light emitting element for the three primary colors.
), green (G), and blue (B), but since the green (G) light emitting element has a smaller amount of light emitted from the luminance ratio than the other colors, green ( G) A plurality of light emitting elements are used so that the luminance ratio is R, G, B.
The ratio is 3:6:1.

Further, for the pixel array, an eave-shaped shader as shown in FIG. 4, for example, has been used to block external light.

In Fig. 4, pixel 1 that displays a color image is composed of two groups of light emitting elements for each of the three primary colors, and in the case shown, one for red (R) light emission and one for blue (B) light emission. Two green (G) light emitting lights are used. A desired number of pixels 1 are arranged vertically and horizontally on the plane of the panel 3, and canopy-shaped shaders 4.4 are provided above and below the horizontal row of pixels 1.

This shader 4.4 is provided to prevent the color image formed by the light emission within the pixel 1 from becoming difficult to see due to the reflection of external light. When it comes to external light whose incident angle changes, there is a problem in that the prevention of reflection from the side direction is insufficient, especially outdoors, and color images become unsightly.

[Problem to be solved by the invention]

As mentioned above, in conventional color image devices, an image is formed on the pixel surface depending on whether or not each pixel emits light, but the light emitting element in the pixel is exposed to external light such as sunlight on the front light emitting surface. When the light is directly incident from the direction, it is difficult to obtain an easy-to-see image contrast due to insufficient anti-reflection.

It is an object of the present invention to provide a shader that can significantly prevent external light from directly entering the front of a light emitting element from the peripheral direction, thereby stabilizing the contrast of an image and improving the color mixture of color light emission. purpose.

[Means to solve the problem]

FIG. 1 is a perspective view showing a shader of the present invention. In the same figure, the pixel 5 is configured using four light emitting elements 6 in units of three primary colors, as in the conventional example described above, and for this pixel 5, a The shader 8 is provided in a spiral shape to prevent diagonal external light from all directions from directly entering the light emitting surface 6a of the light emitting element 6.

[For production]

In the present invention, as explained in the above means, the shader 8 is formed in a spiral shape on the outside and inside of the side surface of the light emitting element 6.
By surrounding it with , it is possible to prevent diagonal external light from all directions from directly entering the light emitting surface 6a of the light emitting element 6, thereby reducing the contrast of the image formed by the light emitted from the light emitting element 6. The reduction prevention can be significantly improved.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view of a shader for pixels. In the figure, the pixel 5 is composed of three primary color units using four light emitting elements 6 as described above, and although one set of pixels 5 is shown in the figure, in reality, the pixel 5 is composed of three primary color units using four light emitting elements 6. A number of pixels 5 necessary for the shape of the image are arranged vertically and horizontally on the plane of the panel 7 and used. A shader 8 is formed in a spiral shape and is attached to the pixel 5 to cover the side surface of each pixel 5.

FIG. 2 shows the attached state of the shader 8 when viewed from the front. The spiral shape of the shader 8 is formed in a series so as to surround the outer and inner sides of the light emitting elements 6 constituting one set of pixels 5, and can be attached to the flat surface of the panel 7 by appropriate means. There is. The shader 8 is made of a material that blocks light and maintains its spiral shape. In the case shown, it is made of a thin aluminum plate, and the outer surface is finished in black and is non-reflective. In addition, the inner surface facing the light emitting element 6 is finished as a reflective surface.

This shader 8 also applies to the panel 7 as shown in FIG.
The edge 8a is formed with a width region 8b that can protrude toward the front (front direction) from the light emitting surface 6a of the head of the light emitting element 6 when the light emitting element 6 is attached to a flat surface.

In the above, since the inner surface of the shader 8 is finished as a reflective surface, the primary colors emitted when the light emitting elements 6 of the three primary colors emit light can be effectively mixed by diffused reflection within the shader 8, and The luminances of the light emitting surfaces 6a are averaged.

Incidentally, in the above embodiment, the case where the shader 8 is formed in a spiral shape has been explained, but since a considerable number of the pixels 5 are arranged on the surface of the panel 7 to constitute a color image device, The shader 8 may have a honeycomb shape, for example, and correspond to the pixels 5.

[Effects of the Invention] According to the present invention, the shader 8 is shaped so as to surround the periphery of the pixel, and the front edge of the shader is located in front of the light emitting surface of the head of the light emitting element. Therefore, external light that attempts to enter the light emitting surface of the light emitting element from an oblique direction is blocked in all directions, so that the contrast of the image formed by the light emitted from the light emitting element is reduced by the reflection caused by the external light. This eliminates the problem and maintains it in an easy-to-see condition.
In addition, the light emitted from the light emitting element is diffusely reflected within the shader, so that the color mixing properties of the pixel can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a shader with respect to a pixel showing an embodiment of the present invention; FIG. 2 is a front view showing how the shader is attached; FIG. 3 is a side view showing a cross section of the shader being attached; The figure is a perspective view of a main part showing a conventional example of a mount. 5 ・Pixel, 6 ・Light emitting element, 8 Shader

Claims (1)

[Claims] Pixel (
5) A shader for improving contrast and color mixture of a light emitting element, characterized in that it is formed in accordance with item 5), is provided at a position surrounding the side surface of the light emitting element (6), and has a spiral front surface.