Light box

A light box and point light source technology, which is applied to instruments, lighting and heating equipment, semiconductor devices of light-emitting elements, etc., can solve the problem of uneven illumination on the surface of the light box, suppress the uneven surface illumination, achieve thinning, reduce uneven effect of light

CN101641547AInactive Publication Date: 2010-02-03FURUKAWA ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-02-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

To provide a thin light box employing a light source of strong directivity such as an LED, or a light box in which occurrence of unevenness in surface illuminance is suppressed even when the number ofLEDs is reduced by a factor of 4-9 as compared with prior art. ¢MEANS FOR SOLVING PROBLEMS! The light box (1) comprises a plurality of spot light sources (4), and a light reflector (21) having recesses (22) surrounding the spot light sources (4), respectively. The spot light sources are inserted into insertion holes (23) formed in the bottom of the containing recesses (22), respectively. When theincident angle of light exiting the spot light source (4) is 0 DEG and the spot light sources (4) are spaced apart by 350 mm, the illuminance is 15000 cd / m<2> or less and the light exiting the spotlight source (4) is reflected partially or entirely on the inner surface of the containing recesses (22) before offering illumination.
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Description

technical field

[0001] The present invention relates to a light box, and more particularly to an interior-illuminated light box using point light sources such as LEDs (Light Emitting Diodes), and more specifically, to an interior-illuminated light box applicable to electric signboards, interior-illuminated signs, and liquid crystal display devices. Light boxes for backlights and lighting fixtures. Background technique

[0002] Conventionally, straight tube-shaped light sources such as fluorescent lamps and cold-cathode tubes have been used in interior-illuminated light boxes. However, the service life of fluorescent lamps is relatively short. For example, for a 40W ordinary straight tube fluorescent lamp, its service life is about 12,000 hours. Since the fluorescent lamps are replaced every time they are disconnected, the fluorescent lamps are replaced at the same time once a year. However, there is a problem that it is necessary to work at high places at night.

[0003] I...

Examples

Embodiment 1

[0095] made figure 1 and figure 2 Light box 1 shown.

[0096] Set shell 2 at figure 1 The longitudinal dimension (inner dimension) shown in the up and down direction of the figure 1 The horizontal dimension (inner dimension) shown in the left and right direction of the is 400mm, in figure 2 The upper and lower directions show a planar rectangular shape with a depth dimension of 60mm for the upper opening. In addition, the thickness dimension of the bottom plate 2a and the side plate 2b was set to 4 mm, respectively. On the upper surface of the bottom plate 2a of the housing 2 (the inner surface of the bottom of the housing 2), three vertically, vertically and horizontally at intervals of 100 mm are arranged in a matrix at intervals of 100 mm in the vertical direction perpendicular to each other. A total of 12 light source modules 3 of 4 in the horizontal direction are used as point light sources.

[0097] As the light source module 3 , Shining Eye (L) (trade name of Ko...