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Light guide plate display device

A technology of display device and light guide plate, which is applied in the direction of display device, lighting device, optics, etc.

Active Publication Date: 2017-05-10
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, since the light incident on the vertical surface of the prism group 19a passes through the prism, it cannot be visually recognized by the observer.

Method used

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Embodiment Construction

[0039] Before describing the embodiments of the present invention, problems in conventional light guide plate display devices will be briefly described. In the configuration described in Patent Document 1, only one pattern can be displayed for one prism group. Therefore, in order to display four kinds of patterns, it is necessary to use four prism groups 19 a to 19 d with different slope directions and arrange them in the light guide plate 12 . Therefore, the total area of ​​the region where the prisms are formed becomes larger with respect to the area of ​​the display surface of the light guide plate 12 . As a result, the transparency of the light guide plate 12 becomes low.

[0040] Figure 27 It is a diagram showing another conventional light guide plate display device using a quadrangular pyramid prism. The slopes of the quadrangular pyramid prism 32 have the same shape, so that a single pattern with uniform brightness can be displayed regardless of the light coming fro...

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Abstract

The invention discloses a light guide plate display device which comprises a light guide plate, a plurality of light source devices, and a plurality of prisms. The light guide plate has a display surface and a plurality of end surfaces and is formed from a translucent material. The light source devices are disposed along each of the end surfaces of the light guide plate and emit light toward the inside of the light guide plate from the end surfaces. The prisms are formed inside the light guide plate. Each prism has a plurality of side surfaces facing each of the light source devices. Each side surface inclines in at least two slopes in the thickness direction of the light guide plate: a transmissive slope for transmitting light emitted from a light source device; and a reflective slope for reflecting the light emitted from the light source device and emitting the light to the display surface.

Description

technical field [0001] The present invention relates to a light guide plate display device for displaying patterns such as characters and patterns by using a light guide plate. Background technique [0002] For example, a conventional light guide plate display device disclosed in Patent Document 1 includes a light guide plate and triangular prisms. The light irradiated inside from the end surface of the light guide plate passes through the prism and is emitted from the display surface of the light guide plate. In this way, the light guide plate display device performs pattern display. Figure 25 as well as Figure 26 It is a diagram showing a conventional light guide plate display device described in Patent Document 1. FIG. [0003] The light guide plate display device described in Patent Document 1 includes: a light guide plate 12; ; and four prism groups 19a, 19b, 19c, 19d. In addition, in Figure 25 In the figure, although one prism is shown as each of the prism group...

Claims

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Application Information

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IPC IPC(8): G09F13/18F21K9/61F21K9/69F21K9/68F21Y115/10
CPCG09F13/18G09F13/14G02B6/002G02B6/003G02B6/0058G02B6/0043G02B6/0031G02B6/0036G02B6/006G02B6/0068G02B6/0083G02B6/0088G09F13/16
Inventor 福井厚司松村圭三山口刚由
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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