TW201535024A - Edge-type lighting module structure - Google Patents

Abstract

The invention is related to an edge-type lighting module structure, which comprises at least a light source, a light guiding plate, and an optical diffusion film. The light source is set at one side of the light guiding plate. The light guiding plate has an irregular rough surface at the bottom while the optical diffusion film is set on the light guiding plate. By utilizing the structure, the light source emits light so that the light illuminates the irregular rough surface after the light entering the irregular rough surface for generating diffuse reflection of the light. Reflective light half-peak value angular difference of the light is smaller than 15 degrees. The reflected light passes through the optical diffusion film so that light-emitting of the light is adjusted within plus or minus 5 degrees.

Description

Sidelight type light module structure 【0001】

The invention relates to a light-emitting module, in particular to an embodiment of an edge-lit light-emitting module structure that utilizes an irregular rough surface to reflect light.

【0002】

Modern technology is changing with each passing day, inventing many electronic technology products, making human life more convenient for many people, and the speed of updating various electronic products is very fast, such as notebook computers, smart phones, tablets, car monitors or LCD TVs. .... The above-mentioned electronic products are one of the important inventions of modern science and technology. Nowadays, electronic products are constantly pursuing thinning and small size, so that these electronic devices can be conveniently carried around with them, and can be used anytime and anywhere, and can be seen as smart phones or tablets. It has been closely related to modern life, and all of the above electronic products need to utilize an external lighting module to provide the planar light source.

[0003]

The common backlight module can be divided into a direct type light emitting module and an edge light type light emitting module, and the side light type light emitting module and the direct light type light emitting module are roughly divided into two types, one of which is A cold cathode fluorescent lamp (CCFL) lamp type planar light source module, and an LED type planar light source module including a light emitting diode (LED).

[0004]

However, since the planar light source module using the CCFL as the light source is affected by the volume of the CCFL, and the entire planar light source module needs to have a large thickness space, the volume of the lamp-type planar light source module cannot meet the market. The mainstream demand is the demand for thin products today. Because LED has the characteristics of small size, light weight, long service life, high brightness, and low power consumption, the lighting fixtures that use LED as a light source gradually replace the lamp as the main light source of the lighting fixture, and the LED is Installed on the side of the light guide plate of the planar light source module, the light emitted by the LED is incident from the side of the light guide plate, and the light guide plate is matched with the reflector and the like, so that the light is emitted from the light exit surface through the continuous reflection and refraction. In order to provide the luminous effect of the planar light source and meet the requirements of thin products.

[0005]

Since most of the current planar light source modules are used for lighting purposes, the light-emitting module inside the lamp device mainly has a light source, a light guide plate, a diffusion sheet and the like, wherein the light guide plate mainly depends on the light inside. The effect of total reflection is to conduct light, and then the light is guided out of the light guide plate by using a light guiding manner to change the light conduction path, and the total reflection of the light is mainly provided by a reflective structure at the bottom of the light guide plate, usually the reflective structure is The use of microstructures or dots, etc., is primarily aimed at directing light out of the glossy surface.

[0006]

The invention relates to a structure of an edge-lit light-emitting module, which is provided with a light guide plate, and the bottom of the light guide plate is provided with an irregular rough surface. The purpose of the irregular rough surface is to generate a diffuse reflection phenomenon after the light is irradiated, and there is no regularity. Sexuality and sequence, and the bottom surface of the light guide plate in the prior art is provided with a microstructure or a dot, the microstructure or the mesh is intended to direct the light to the light surface after the light is irradiated, and the purpose of the two is different. The use of an irregular rough surface for the diffuse reflection of light is an invention that is progressive and novel.

【0007】

The main object of the present invention is to provide a structure of an edge-lit light-emitting module, which utilizes an irregular rough surface to cause light to illuminate to produce a diffuse reflection phenomenon.

[0008]

A secondary object of the present invention is to provide an edge-lit light-emitting module structure that uses an optical diffuser to adjust the angle of light passing through the light.

【0009】

In order to achieve the above-mentioned purpose and effect, the present invention is an edge-lit light-emitting module structure, which mainly has at least one light source, a light guide plate, and an optical diffuser, and the light guide plate is disposed in one of the light sources. The side of the light guide plate is provided with an irregular rough surface. The optical diffuser is disposed on the light guide plate. The light source emits a light through one side of the light guide plate, and the light is irradiated to the irregularity. A rough surface that causes the light to diffusely reflect.

10‧‧‧Light source

110‧‧‧Light

20‧‧‧Light guide

210‧‧‧ Irregular rough surface

30‧‧‧Optical diffuser

40‧‧‧ Shell

400‧‧‧Reflective structure

410‧‧‧ accommodating slots

420‧‧‧ openings

50‧‧‧Brightening film

60‧‧‧protection board

[0010]

The first figure is a side view structural view of the edge-lit light-emitting module according to the first embodiment of the present invention;

2A is a schematic diagram of a light path of the edge-lit light-emitting module according to the first embodiment of the present invention;

FIG. 2B is a second schematic diagram of a light path of the edge-lit light-emitting module according to the first embodiment of the present invention;

The third figure is a side view structural view of the brightness enhancement film of the edge-lit light-emitting module according to the second embodiment of the present invention;

Figure 4 is a schematic view of a panel of an edge-lit light-emitting module according to a second embodiment of the present invention.

[0011]

In order to provide a better understanding and understanding of the features and the efficacies of the present invention, the preferred embodiment and the detailed description are as follows:

[0012]

The side-lighting light-emitting module of the prior art mainly comprises: a light source, a light guide plate and a diffusing plate, wherein a reflective structure is arranged on the bottom of the conventional light guide plate, and generally the reflective structure utilizes a microstructure or a dot, etc. The technique uses the reflective structure to illuminate the light, and then directs the light to reflect. The reflective structure is different from an irregular rough surface disposed on the bottom of the optical member of the present invention. The present invention utilizes the irregular rough surface to illuminate the light. , causing the light to produce diffuse reflection.

[0013]

Please refer to the first figure, which is a structural diagram of the edge-lit light-emitting module of the present invention; as shown in the figure, the present invention is an edge-lit light-emitting module structure, comprising: at least one light source 10 and one light guide plate 20 and an optical diffuser 30 having an irregular rough surface 210.

[0014]

As described above, the edge light type light emitting module structure of the present invention is disposed on one side of the light source 10, the irregular rough surface 210 is disposed at the bottom of the light guide plate 20, and the optical diffusion The light source 10 is disposed on the light guide plate 20, wherein the light source 10 emits a light 110 to the irregular rough surface 210, and the irregular rough surface 210 causes the light 110 to produce a diffuse reflection phenomenon.

[0015]

Please refer to FIG. 2A and FIG. 2B respectively, which are schematic diagrams and schematic diagrams of the light path of the edge-lit light-emitting module according to the first embodiment of the present invention; as shown in the figure, a side light of the present invention is shown. The light emitting module structure uses the light source 10 to emit a light 110. The light ray 110 enters from one side of the light guide plate 20, and a portion of the light ray 110 directly illuminates the upper illuminating surface, and a portion of the ray 110 is irradiated toward the irregular rough surface 210. The irregular rough surface 210 causes The ray 110 produces a diffuse reflection phenomenon that causes the ray 110 to reflect or refract the exit path, and the reflected light 110 passes through the optical diffuser 30 and illuminates the ray 110.

[0016]

The main purpose of the structure of the edge-lit light-emitting module of the present invention is to cause the light 110 to illuminate the irregular rough surface 210 to cause the light 110 to diffusely reflect. Generally, the light guide plate is the main light-emitting module. One of the components, and the optical principle of the light guide plate has application reflection, total reflection and refraction, etc., the light guide plate 20 of the present invention has a method of destroying the total reflection, and there is no way to generate total reflection. For example: specular reflection, diffuse reflection and diffuse reflection, specular reflection means that the angle of incidence of the light is equal to the angle of reflection, and spread reflection refers to the scattering of the light, and the path of the light reflected by the scattering Reflected in a certain regular direction, however, the main technical principle of the present invention is that the diffuse reflection phenomenon (diffuse reflection) is that the light irradiated on the rough surface will be reflected in all directions without order and irregularly. phenomenon. The diffuse reflection phenomenon of the present invention has a difference from the above-mentioned specular reflection and diffusion reflection, that is, when a parallel incident light hits a rough surface, the incident light must obey the law of reflection of light, in the law of reflection. The incident ray and the reflected ray are in the same plane as the normal line, and the reflected ray and the incident ray are separated on both sides of the normal line, and the normal line is perpendicular to the plane, and the angle between the incident ray and the normal line is equal to the angle between the reflected ray and the normal line, and Because the rough surface has a plurality of surface components on the fine surface, the rough surface has a plurality of normal lines. Since the light obeys the law of reflection, the light is reflected in all directions, so the rays are parallel to each other, and the light is also followed. The normal directions of the points are inconsistent, causing the reflected light to be reflected irregularly in different directions. This kind of reflection is called "diffuse reflection" or "diffuse". The light in the form of reflection is called diffused light.

[0017]

By using the above principle, the light 110 of the present invention is irradiated on the irregular rough surface 210, and the light 110 is reflected by the surface of the irregular rough surface 210, so that the light 110 is reflected more uniformly in all directions. The light pattern that produces the reflected light 110 has a half-peak angle difference of less than 15 degrees, and the half-peak angle difference is one of the light reflected by the irregular rough surface 210. The light-emitting surface A is regarded as a point light source, and the light-emitting surface A is emitted. The light forms a light pattern. And the half of the light intensity peak of the light type corresponds to the angle of the light type, which is the half-peak angle of the light, and then the optical axis B perpendicular to the light-emitting surface A is used to distinguish the two halves corresponding to the left and right sides of the light type. The peak angle is obtained by taking the absolute value of the two half-point peak angles corresponding to the left and right and taking the absolute value to obtain the absolute value of the half-peak angle of the light type.

[0018]

Moreover, the light 110 is limited to have a smaller reflection angle, and the light 110 passes through the optical diffuser 30, and has the light exit surface A, and the light exit surface A is perpendicular to the light exit surface A. The angle ψ is adjusted to be within 5 degrees of the left and right sides of the optical axis B, so that the light pattern of the light 110 is controlled within the range, and the optical diffusing plate 30 of the present invention can effectively guide the light 110 passing through The light 110 capable of providing a high collimation characteristic enhances the condensing property of the light 110, can be effectively utilized in a lighting device or a backlight module, etc., and the material of the optical diffusing plate 30 is a material that can transmit light. The light-transmitting material such as PC, PMMA, PS or PET may be further doped with the diffusion particles or the processing microstructure of the optical diffusion plate 30 to improve the uniformity of the optical diffusion plate 30 and change the light distribution curve. The light source 10 and the optical diffuser 30 are detachable and replaceable, so that the optical diffuser 30 is replaced by a user's request.

[0019]

Please refer to the third figure, which is a side view structural view of the brightness enhancement film of the edge-lighting module according to the second embodiment of the present invention; as shown in the figure, a side view light-emitting module structure of the present invention further The housing 40 is disposed in a housing 40. The housing 40 has a receiving slot 410. The receiving slot 410 communicates with an opening 420. The light source 10 is disposed on one side of the receiving slot 410. The optical plate 20 and the optical diffuser 30 are disposed on the accommodating groove 410 of the opening 420. The inner wall of the accommodating groove 410 is configured as a reflective structure 400, which is mainly emitted from the bottom of the light guide plate 20. The light is reflected back inside the light guide plate 20, and the light scattered by the light source 10 is concentrated toward the light guide plate 20. Further, a brightness enhancement film 50 is disposed on the opening 420, and the light 110 is diffused through the light. After the sheet 30, the light intensity distribution is scattered, and the brightness enhancement film 50 is provided to increase the brightness of the forward direction and increase the use efficiency of the light 110. The brightness enhancement film 50 can increase the forward luminance of the edge-lit backlight module structure of the present invention by 50% to 100%, and a protection board 60 is disposed on the brightness enhancement film 50. The protection board 60 is a light-transmitting material. The protection board 60 is used to protect the internal structure of the edge-lit backlight module.

[0020]

Please refer to FIG. 4 , which is a schematic diagram of a panel of an edge-lit light-emitting module according to a second embodiment of the present invention; as shown in the figure, the present invention further provides a pattern and a text on the surface of the optical diffuser 30 . Or the symbol can be used for aesthetics or decoration or to transmit a message, so the optical diffuser 30 is replaced by a change of the user's needs.

[0021]

In summary, the present invention is an edge-lit light-emitting module structure, and has at least one light source 10, a light guide plate 20, and an optical diffuser 30. The light guide plate 20 is disposed on one side of the light source 10. The optical diffuser 30 is disposed on the light guide plate 20. With the above structure, the irregular rough surface 210 causes the light 110 to illuminate to generate a diffuse reflection phenomenon, and the optical diffuser 30 adjusts the light passing through the light 110. angle.

[0022]

Therefore, the present invention is a novelty, progressive and available for industrial use. It should be in accordance with the patent application requirements of the Chinese Patent Law. It is undoubtedly the invention patent application, and the Prayer Council will grant the patent as soon as possible. .

[0023]

However, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, so that the shapes, structures, features, and spirits described in the claims of the present invention are equally changed. Modifications are intended to be included in the scope of the patent application of the present invention.

10‧‧‧Light source

110‧‧‧Light

20‧‧‧Light guide

210‧‧‧ Irregular rough surface

30‧‧‧Optical diffuser

Claims (9)

[Item 1] An edge-lit light-emitting module structure comprising:
At least one light source;
a light guide plate disposed on one side of the light source, the bottom of the light guide plate is provided with an irregular rough surface; and an optical diffusion sheet disposed on the light guide plate;
The light source emits a light beam passing through one side of the light guide plate, and the light is irradiated to the irregular rough surface, and the irregular rough surface causes the light to diffusely reflect. [Item 2] The structure of the edge-light type light-emitting module according to claim 1, wherein the material of the optical diffuser is a light-transmitting material, which is PC, PMMA, PS or PET. [Item 3] The edge-lit light-emitting module structure of claim 1, wherein the light is limited by the irregular rough surface, and the light is irradiated to the irregular rough surface to reflect a half-peak angle difference. Less than 15 degrees. [Item 4] The edge-lighting module structure of claim 1, further comprising a light-emitting surface A and an optical axis B perpendicular to the light-emitting surface A, the light pattern of the light being symmetrical to the optical axis Within 5 degrees of the left and right sides of B. [Item 5] The structure of the edge-lit light-emitting module of claim 1, further comprising a housing having a receiving slot, the receiving slot communicating with an opening, the light source being disposed in the housing The light guide plate and the optical diffuser are disposed on the accommodating groove of the opening, wherein the inner wall of the accommodating groove is a reflective structure. [Item 6] The edge-lit light-emitting module structure of claim 5, further comprising a brightness enhancement film disposed on the opening. [Item 7] The structure of the edge-lit light-emitting module of claim 6, further comprising a protective plate disposed on the brightness enhancing film, the protective plate being a light-transmitting material. [Item 8] The edge-lit light-emitting module structure according to claim 1, wherein the surface of the optical diffusing plate is provided with a pattern, a character or a symbol. [Item 9] The edge-lit light-emitting module structure of claim 1, wherein the light source and the optical diffuser are in a detachable replacement structure.