JP3135856B2 - Edge light panel installed at a high place Transparent bar light source for the entrance end surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent bar light source for providing an incident light to an incident end face of an edge light panel for performing surface illumination and for providing the incident light to the edge light panel which is installed at a high place. About.

[0002]

2. Description of the Related Art An edge light panel (also referred to as a light guide plate) for performing this kind of surface illumination is used, for example, as a liquid crystal backlight mounted on a liquid crystal display device, or as an illumination signboard.
The edge light panel is also used as a display stand. Generally, the edge light panel uses a transparent substrate made of a transparent resin such as acrylic, and prints a light guide pattern using halftone dots for incident light guide on the back surface with one or more end surfaces as an incident end surface. And a post-forming process, or an integral process at the time of molding the transparent substrate. A fluorescent light source of a hot cathode or a cold cathode is provided on the incident end surface to supply incident light to the incident end surface. The above-mentioned surface illumination is performed by guiding incident light by the light guide pattern.

[0003]

In this case, the surface illumination by the edge light panel can be made to be in a preferable state of high brightness and high uniformity by the incident light from the fluorescent lamp light source. However, there is a problem that the fluorescent lamp light source generates heat, and the fluorescent lamp light source needs to be replaced depending on the lamp life. Although this is an improvement, it does not provide a basic solution.

When the fluorescent lamp light source generates heat, the temperature of the edge light panel, the liquid crystal display surface of the liquid crystal backlight, and the film or panel to be illuminated such as a lighting signboard rises, which adversely affects these. On the other hand, replacement due to lamp life requires disassembly of liquid crystal display devices and lighting signs, etc., and use of edge light panels for installing high places such as road signs, for example. In the case of an object, it is necessary to perform an exchange operation at a high place, so that the operation is complicated.

The present invention has been made in view of such circumstances, and a solution to the problem is that it can be used in place of a fluorescent light source having the above-mentioned problems, and is not limited to supplying incident light to an edge light panel. It is another object of the present invention to provide a transparent bar light source for installing an edge light panel incident end face which is installed at a high place and is suitable for mass production.

[0006]

According to the present invention, in accordance with the present invention, instead of a fluorescent lamp light source, an edge face of an edge light panel is provided adjacent to an incident end face of the edge light panel, and a primary light is applied from an incident end face at one end, both ends, or an intermediate position thereof. A transparent bar light source used to perform secondary illumination in the longitudinal direction by supplying the light source light through an optical cable, and this is a methacrylic resin which is particularly high in transparency and excellent in light transmission among acrylic resins. A bar material is formed by extrusion molding into the same cross-sectional shape with a front curve, and the bar material is provided with a dot-like or post-formed incident light guiding means in the center of the back surface by laser processing, which is inversely proportional to the amount of incident light. It is a line shape or the like, and the front curved surface is provided with the incident light guiding means at the center of the rear surface. The secondary illuminating light to the side is made to pass over the incident end face of the edge light panel so that sufficient incident light can be supplied to the edge light panel as a light source for the edge light panel. The method according to claim 1, wherein the methacrylic resin is formed into a solid circle, a solid semi-circle or the like with a front side curved shape. Incident light guide by a dot-shaped or line-shaped fine crater that guides light in inverse proportion to the amount of incident light in the longitudinal direction from the incident end face at one end, both ends, or the intermediate position at the back side center position of the bar material extruded into the same cross-sectional shape The means is post-processed by laser processing, and the light guide of the incident light guide means is inversely proportional to the amount of incident light by density, depth or both, and a primary light source for the incident end face. Supplying the longitudinal altitude installation edge light panel transparent bar light source incident end face 臨設 characterized by performing secondary illumination performed via the optical cable, the invention of claim 2 and 3,
In addition, in addition to the above, the invention according to claim 2 is configured so that the supply form of the incident light to the edge light panel can be made continuously or intermittently according to a predetermined position. 2. The transparent bar light source according to claim 1, wherein the incident light guiding means is formed by post-processing continuously in the longitudinal direction of the bar material. The invention according to claim 3, wherein the incident light guide means is formed with an unprocessed portion in a longitudinal direction of the bar material and is post-processed in an intermittent manner. A transparent bar light source for an edge light panel incident end face side installed at a place is used as a means for solving the above problems as the gist of the invention.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the drawings. In FIGS. 1 to 4, A is a surface lighting device, 1 is an edge light panel, 5 is a reflection sheet,
Reference numeral 6 denotes a diffusion sheet, 10 denotes a transparent bar light source for providing the incident end face 3 of the edge light panel 1, and 15 denotes a reflection cover serving as a back side reflection means of the transparent bar light source 10.

In the edge light panel 1, one end face of a transparent substrate 2 is used as an incident end face 3, and a light guide pattern 4 based on halftone dots density-modulated toward a non-light source side for incident light guide is provided on the rear face of the transparent substrate 2. It is formed by post-processing by screen printing or by integral molding at the time of injection molding of the transparent substrate 2.

The transparent bar light source 10 is formed by extruding methacrylic resin into the same cross-sectional shape having a front-side curved shape such as a solid circle or a solid semicircle at one end, both ends or an intermediate position at a center position on the back side of the bar material 11. An incident light guide means for guiding light in inverse proportion to the amount of incident light in the longitudinal direction from the end face 12 is post-processed, and primary light source light is supplied to the incident end face 12 via the optical cable 21 to perform secondary illumination in the longitudinal direction. The edge light panel installed at a high place is provided for the incident end face side. At this time, the post-processing and formation of the incident light guide means 13 are as follows.
This is performed by laser processing of the bar material 11, the incident light guiding means 13 is formed by a fine crater 14 such as a dot or a line, and the inverse proportion of the light guiding to the incident light amount is determined by density, depth or both. And the incident light guiding means 13 comprises:
This is post-processed and formed continuously in the longitudinal direction of the bar material 11.

That is, in the present example, the methacrylic resin is made particularly high in purity with as few foreign substances as possible, for example, having a specific gravity of 1.19 (according to JIS K 7112) and a refractive index of 1.49 (JIS K 7112). 7105), an optical property of 93% (same as above), a haze of 0.5% (same as above), and a molding shrinkage of 0.2 to 0.6% (ASTMD9).
55), and extruded to obtain a solid round solid bar in the present example. The center of the back side curve in the thickness direction is lengthened by laser processing. A fine crater 14 forming each light guiding unit, which forms a dug hole in the form of a circular dot and irregularly reflects the incident light by making it low concave, and promotes this by making it a large number so that light can be guided very effectively. To
This is based on the post-processing of the bar material 10 which is continuously engraved and scattered so as to be parallel in the thickness direction. In this case, in this example, the incident light guiding means 13 is used. That is, the inverse proportion of the light guide to the amount of incident light at the crater 14 forming the light guide pattern is represented by the incident end face 12 at one end.
The density of the light is changed from the pitch toward the non-incidence end face side in the longitudinal direction by the pitch change, whereby the irregular reflection of the incident light incident on the bar member 10 from the incidence end face 14 toward the separation direction is steplessly performed. The illumination light to the front side is made uniform in the longitudinal direction so as to promote the increase.

The formation of the incident light guide means 13 by laser processing on the bar material 10 is performed, for example, by feeding the bar material 10 into a laser device, forming a large number of craters 14 in a predetermined width in the longitudinal direction by laser irradiation, and moving the craters 14 sequentially. The craters 14 may be formed to have a predetermined width, and laser irradiation may be performed by a laser device that covers the length of the bar material 10, and the craters 14 in the longitudinal direction may be formed at the same time. .

The optical cable 21 uses, for example, a surface lighting device A such as a road sign to transmit the incident light of the primary light source 20 installed at a low position to the surface lighting device A at a high position from the separated position to the transparent bar light source 10. The flexible pipe is filled with transparent silicon having a high light transmittance, for example, in the form of a sol so as to be supplied to the incident end face 12. An adapter 22 for connecting the transparent bar light source 10 is provided at one end of the optical cable 21.
The primary light source 20 is provided at the other end of the optical cable 21 to supply the primary light source light to the incident end face 12 via the optical cable 21 to supply the primary light source light to the transparent bar light source 1.
In this case, the primary light source 20 of the present embodiment is a high-intensity lamp such as a mercury lamp, a metal halide lamp, a high-pressure sodium lamp, or the like.

FIG. 5 shows another example. At this time, after the transparent bar light source 10 is extruded or laser-processed, the bar material 11 is heated and bent at a predetermined position, for example, in accordance with a temporarily stopped road sign. And further bent into a plane triangular shape,
Further, assuming that the circular hole at the intermediate position in the longitudinal direction is formed by mechanically post-processing the circular hole in this example, the edge light panel 1 also has a triangular shape. (In which the density is modulated toward the portion), the triangular surface illumination device A is formed by surrounding the outer peripheral incident end face of
At this time, the incident light guiding means 12 by the same laser processing in the transparent bar light source 10
1 is provided with a non-processed portion 15 in the longitudinal direction, and is post-processed and formed intermittently. In this example, the incident light guide means 13 is provided at each of the right and left bent portions in the triangular figure. A non-processed portion 16 which is a non-formed portion is provided so as to be in inverse proportion to the amount of incident light in each longitudinal direction from the incident end face 12 on both sides thereof, and is bonded in the vicinity of the incident end face 12 for the adapter 22 of the optical cable 21. It is assumed that the adapter receiver 24 is installed by the above method, and the rest is basically the same as the above example, so that the incident light is not consumed at each corner of the edge light panel 1 and each straight line is not consumed. The illumination light can be suitably supplied to the edge light panel 1 at the incident end face 3 of the light emitting device.

FIGS. 6 to 8 show examples of the cross-sectional shape of the bar material 11 in the transparent bar light source 10. FIG. 6 shows a solid semicircular shape, which is extruded into the same cross-sectional shape with a curved front side. Example, FIG. 7 is an example in which the shape is a rectangular shape or a rectangular shape having a solid one-sided curve, and the same cross-sectional shape of the front side is extruded. FIG. 8 is a trapezoidal shape having a solid one-sided curve. This is an example of extrusion molding into a cross-sectional shape, in which the curved surface side is used so as to face the incident end face 3 of the edge light panel 1 in the same manner as described above.

Although the illustrated example is as described above, according to the present invention, the inverse proportion of the light guide to the incident light amount of the incident light guiding means is determined by the density change by the pitch change and the density change by the pitch change.
It shall be based on the density of density modulation due to a change in the crater area, the depth of irregular reflection modulation due to a change in the crater depth, or a combination of both. When a post-process is formed intermittently with a non-processed portion, for example, incident light guide means are formed respectively in accordance with a plurality of sections of the back-lighted portion formed on the edge light panel. The above-mentioned unprocessed portion is to be provided. With both ends of the bar being the incident end faces of the primary light source, the incident light guiding means is directed in a direction from the middle position to the center position in the longitudinal direction of the bar material. The primary light source is provided on the incident end face of the bar material to directly supply the incident light. Specific shapes of the bar material of the present invention, the incident end face, the incident light guiding means, the fine crater by laser processing, the means inversely proportional to the incident light amount, including the construction of a surface illumination device for a backlight, etc. , Structures, their relations, and specific forms of addition to these can be varied in many ways, and need not be limited to those illustrated and described above.

[0016]

The present invention is configured as described above. According to the first aspect of the present invention, a methacrylic resin having excellent light transmittance is extruded into the same cross-sectional shape with a front curve. By forming the incident light guiding means in the center position on the back side by laser processing, the formation of the incident light guiding means is precise, high in accuracy and suitable for mass production.
The incident light guide means effectively guides the light source light of the primary light source and supplies sufficient incident light to the incident end face of the edge light panel by a lens effect, so that the incident light is preferably supplied to the edge light panel. It is possible to provide a transparent bar light source for the secondary lighting, which can be used in place of a fluorescent lamp light source which requires replacement at a high altitude and which can be used at a high position and which is provided on an edge face of an edge light panel incident end face. In the invention described in (1), the post-processing of the incident light guiding means is made continuous or intermittent in the longitudinal direction of the bar material. Can be performed continuously or intermittently according to a predetermined position, and the incident light can be suitably supplied according to the illumination of the edge light panel.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a surface lighting device showing a relationship between an edge light panel and a transparent bar light source.

FIG. 2 is a front view showing a relationship between an edge light panel and a transparent bar light source.

FIG. 3 is an enlarged perspective view of a transparent bar light source.

FIG. 4 is an enlarged plan view of the incident light guiding means.

FIG. 5 is a front view showing a relationship between another example of an edge light panel and a transparent bar light source.

FIG. 6 is an enlarged vertical sectional view of another example of a transparent bar light source.

FIG. 7 is an enlarged vertical sectional view of a transparent bar light source of still another example.

FIG. 8 is an enlarged vertical sectional view of still another example of a transparent bar light source.

[Explanation of symbols]

 A-side lighting device 1 Edge light panel 10 Transparent bar light source 11 Bar material 12 Incident end face 13 Incident light guiding means 14 Crater 21 Optical cable

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-325221 (JP, A) JP-A-63-220104 (JP, A) JP-A-10-104435 (JP, A) 110392 (JP, A) Japanese Utility Model Sho 62-9203 (JP, U) Registered utility model 3023030 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F21V 8/00 601 F21S 2 / 00 G02B 6/00 331 G02F 1/1335 530

Claims (3)

(57) [Claims] 1. A bar material formed by extruding methacrylic resin into the same cross-sectional shape having a front side curve such as a solid circle and a solid semicircle at one end, at both ends, or in the longitudinal direction from an incident end face at an intermediate position. The incident light guiding means is formed by laser processing with a fine crater, such as a dot or a line, which guides light in inverse proportion to the amount of incident light.
A transparent bar for mounting an edge light panel on an incident end face installed at a high place, wherein the primary light source light is supplied to the incident end face via an optical cable to perform secondary illumination in a longitudinal direction, the depth being determined by depth or both. light source. 2. The edge light panel as set forth in claim 1, wherein said incident light guide means is formed by post-processing continuously in the longitudinal direction of said bar material. For transparent bar light source. 3. The high installation edge according to claim 1, wherein said incident light guiding means is formed by intermittent post-processing with a non-processing portion in a longitudinal direction of said bar material. Transparent bar light source for the light panel entrance end surface.