Backlight device and transmission type display apparatus

Abstract

The invention provides a backlight device capable of irradiating in a front direction and in a left-right direction and a penetrating display device. A first light source (2) is disposed at an end side of a first light guiding plate (1), and a first prism sheet (3) is disposed at a light outgoing side of the first light guiding plate (1) with a manner that the surface opposite to the first light guiding plate (1) is provided as a triangular prism row. A second light source (4) is disposed at the side of the first light guiding plate (1) opposite to the first prism sheet (3) separated by a vision field angle adjusting membrane. Light emitting by the second light source (4) is controlled by the vision field membrane (5), so that angle of light emitting from the second light source (4) distributes narrowly, and directionality is provided in a normal direction on an exit surface of the first prism sheet (3).

Description

technical field [0001] The present invention relates to a backlight device excellent in illumination characteristics and a transmissive display device excellent in display characteristics. Background technique [0002] Disclosed is a display device having a configuration in which light sources are respectively arranged on two different light-incident end surfaces of a light guide plate, and double-sided prism lenses having triangular prism rows and cylindrical lens rows are arranged on the light-emitting surface side of the above-mentioned light guide plate. sheet, and a transmissive display panel is arranged on the light-emitting surface side of the above-mentioned prism sheet. In this display device, light from the light source is emitted from the transmissive display panel at angles respectively corresponding to left and right parallax, and is synchronized with the light source so that parallax images are alternately displayed on the transmissive display panel, thereby S...

AI Technical Summary

Problems solved by technology

[0006] Although in the display device shown in Patent Document 1, as long as two different images are repeated and rewritten on the liquid crystal panel in synchronization with the lighting switching of the light sources respectively arranged on the two different light incident end faces of the light guide plate, Users who watch from the normal direction of the display surface to 15 degrees to the left and users who watch to the right 15 degrees respectively watch different images, but there is a problem when the main user is facing directly When the panel is displayed, two images are mixed together in the front direction

[0007] In addition, the liquid crystal display panel of Patent Document 2 is provided with a parallax barrier so that an image for a left observer and an image for a right observer are displayed on the pixel formation layer, and the light emitted from each image is guided to the left and right respectively. Viewers on the side and right, so there is a problem that the display angle is tilted, and it is difficult to use when facing the display panel

In addition, since the image forming layer is divided into left and right observers, it becomes an image with half the number of pixels, and there is a problem that the display becomes dark because part of the transmitted light is blocked by the parallax barrier.

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