Light guide module and light guide plate thereof

Abstract

The utility model provides a light guide module and a light guide plate thereof. The light guide module comprises a light guide plate, a pattern layer and a plurality of light sources. The light guide plate comprises a light-in surface, a light-out surface and a reflecting surface. The light incoming surface is perpendicular to the light outgoing surface and is provided with a plurality of light incoming areas. The light-emitting surface of the light guide plate is divided into a light-emitting pattern area and a light shielding area. A plurality of kerfs are formed in the light guide plate, part of the kerfs pass through the light shielding area, and part of the kerfs are separated by the light emitting pattern area and are discontinuous. The pattern layer is located on the light-emitting face of the light guide plate and comprises a light-transmitting area, and the shape of the light-transmitting area corresponds to that of the light-emitting pattern area of the light guide plate. The plurality of light sources are arranged on one side of the light incident surface and correspond to the plurality of light incident areas.

Description

TECHNICAL FIELD

[0001] The utility model relates to a light guide module and light guide plate thereof, especially to a light guide module, which has a light guide plate and can guide and irradiate light to a pattern layer of the light guide module. BACKGROUND

[0002] The existing flat billboard or running light usually uses a light emitting diode as an illuminating component. The light emitting diode is arranged on the front, side or back of the advertising content to clearly display the advertising content in a dim environment.

[0003] However, the existing lighting effect is limited to the light emitting diode of a point light source, which often causes uneven display of the advertising content and easy mixing of light colors. The existing technology is difficult to provide a lighting effect of clear display of each color light segment. SUMMARY

[0004] The utility model provides a light guide module to solve the above-mentioned defects in view of the deficiencies of the prior art.

[0005] To solve the above technical problems, one of the technical solutions adopted by the utility model is to provide a light guide module, which comprises: a light guide plate, including an incident light surface, an outgoing light surface and a reflecting surface, the reflecting surface and the outgoing light surface are opposite to each other, the incident light surface and the outgoing light surface are perpendicular and have a plurality of incident light areas, the outgoing light surface of the light guide plate is divided into an outgoing light pattern area and a light shielding area, the light guide plate forms a plurality of cutting seams, part of the cutting seams in the light shielding area pass through, and part of the cutting seams are disconnected by the outgoing light pattern area; a pattern layer is located on the outgoing light surface of the light guide plate, the pattern layer includes a light transmission area, the shape of the light transmission area corresponds to the outgoing light pattern area of the light guide plate; and a plurality of light sources are arranged on one side of the incident light surface and correspond to the plurality of incident light areas.

[0006] To solve the above technical problems, one of the technical solutions adopted by the utility model is to provide a light guide module, which comprises: a light guide plate, including an incident light surface, an outgoing light surface and a reflecting surface, the reflecting surface and the outgoing light surface are opposite to each other, the incident light surface and the outgoing light surface are perpendicular and have a plurality of incident light areas, the outgoing light surface of the light guide plate is divided into an outgoing light pattern area and a light shielding area, the light shielding area is located on the periphery of the outgoing light pattern area; and a plurality of cutting seams, part of the cutting seams in the light shielding area pass through, and part of the plurality of cutting seams are disconnected by the outgoing light pattern area, each light beam is totally reflected between two adjacent cutting seams and / or is reflected by the reflecting surface and then transmitted by the outgoing light pattern area.

[0007] According to an embodiment of the utility model, the light guide module further includes a plurality of light collecting components, which are arranged on the light inlet surface, the plurality of light collecting components correspond to the positions of the plurality of light inlet areas, and one light collecting component is arranged between two adjacent slits.

[0008] According to an embodiment of the utility model, the light guide module further includes a diffusion sheet, which is arranged on the light outlet surface of the light guide plate, and the diffusion sheet is located between the light guide plate and the pattern layer.

[0009] According to an embodiment of the utility model, the plurality of slits divide the light shielding area into a plurality of strip-shaped light bars.

[0010] According to an embodiment of the utility model, the plurality of slits are parallel to each other.

[0011] According to an embodiment of the utility model, the starting ends of the plurality of slits are adjacent to the light inlet surface and are radially or convergently arranged away from the light inlet surface.

[0012] According to an embodiment of the utility model, the pattern layer is made of a light opaque material, and the part of the pattern layer other than the light transmission area is defined as a light opaque area.

[0013] According to an embodiment of the utility model, the light guide plate further forms a light mixing area, part of the light mixing area is located at the ends of the plurality of slits, and the light outlet pattern area is located between the light mixing area and the light inlet surface. According to an embodiment of the utility model, the light guide module further includes a plurality of light collecting components, which are arranged on the light inlet surface, and one light collecting component is arranged between two adjacent slits.

[0014] According to an embodiment of the utility model, the reflective surface further includes a plurality of microstructures, and the light beams are reflected by the plurality of microstructures and then transmitted through the light outlet pattern area.

[0015] One beneficial effect of the utility model is that the light guide module and the light guide plate provided by the utility model form a plurality of slits, the plurality of slits pass through the light shielding area and do not pass through the light outlet pattern area, the light beams are totally reflected between two adjacent slits and then transmitted through the light outlet pattern area. Therefore, the light guide plate of the utility model can separate different colors of light beams and display the colors of the light beams in the light outlet pattern area and the patterned hollow area of the pattern layer. The display effect is not affected by the slits. The appearance does not show the joint gaps.

[0016] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0017] Figure 1 This is a top view of the light guide module of this utility model.

[0018] Figure 2 This utility model is based on Figure 1 A cross-sectional view of line II-II.

[0019] Figure 3 This is a top view of the light guide plate and circuit board of the first embodiment of this utility model.

[0020] Figure 4 This is a top view of the patterned layer of this utility model.

[0021] Figure 5 This is a top view of the light guide plate and circuit board of the second embodiment of this utility model.

[0022] Figure 6 This is a top view of the light guide plate and circuit board according to the third embodiment of this utility model. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation methods disclosed in this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0024] [First Embodiment]

[0025] like Figures 1 to 4 As shown, this embodiment provides a light guide module 100, which includes a circuit board 10, a reflective layer 20, a light guide plate 30, a diffuser sheet 40, and a pattern layer 50. The circuit board 10 is provided with multiple light sources 60, such as light-emitting diodes. The light guide plate 30 is disposed above the circuit board 10, and the reflective layer 20 is disposed on the bottom surface of the light guide plate 30, located between the light guide plate 30 and the circuit board 10. The diffuser sheet 40 is disposed on the light guide plate 30, and the pattern layer 50 is disposed on the diffuser sheet 40. The components are described in detail below.

[0026] As Figure 3 shown, a top view of the present embodiment removing the diffuser sheet 40 and the pattern layer 50 is shown. Please refer to Figure 2 , the light guide plate 30 includes an incident surface 301, a reflection surface 302 and an exit surface 303. The light guide plate 30 can be, for example, a Polymethyl methacrylate (PMMA) plate or a Polycarbonate (PC) plate. The incident surface 301 is used to receive multiple light beams, which can have the same or different colors. The reflection surface 302 and the exit surface 303 are opposite to each other, preferably parallel. The exit surface 303 is adjacent to the incident surface 301, preferably perpendicular, and has multiple incident regions for light beams to enter. The reflection surface 302 forms multiple microstructures 3023, which are used to break the total reflection of light inside the light guide plate 30, so that the light can be uniformly guided out of the exit surface 303 of the light guide plate 30. In the present embodiment, the exit surface 303 of the light guide plate 30 is divided into an exit pattern region 33A and a light shielding region 33B. The light shielding region 33B is located at the periphery of the exit pattern region 33A, and both are determined according to the pattern layer 50.

[0027] The light guide plate 30 has multiple slits 34, which pass through the light shielding region 33B and do not pass through the exit pattern region 33A. In other words, part of the multiple slits 34 are discontinuous due to the exit pattern region 33A. In the present embodiment, the light guide plate 30 can be set to have one incident region between every two adjacent slits 34 near the light source 60. Alternatively, the multiple slits 34 divide the light guide plate 30 into multiple light strip regions 36. Light beams are totally reflected between two adjacent slits 34 and are confined within the light strip regions 36, so that each light strip region 36 can be independently separated to clearly display light of each color. The light shielding region 33B is divided into multiple strip blocks by the multiple slits 34, and light entering the light guide plate 30 is confined between adjacent slits 34 and proceeds along the light strip regions 36 without mixing with other light strip regions. The exit pattern region 33A is a continuous block (as needed) without being cut.

[0028] In the present embodiment, the multiple slits 34 can start from the end near the incident surface 301, so that the light is confined into strip shape at the incident surface 301. In another possible implementation, the multiple slits 34 can be a small distance away from the incident surface 301 and each enter a light strip region 36.

[0029] In terms of manufacturing process, the light guide plate 30 can be formed by laser dotting on the reflective surface 302 to create multiple microstructures 3023, followed by laser cutting to create multiple slits 34. Alternatively, for mass production, injection molding can be used to complete the light guide plate 30. Specifically, the injection mold can first form mold structures corresponding to the multiple microstructures, slits, and light-concentrating components, thus enabling rapid production of the light guide plate 30. In this case, the light-emitting pattern area 33A of the light guide plate 30 does not have slits 34, allowing the light guide plate 30 to be connected into a single piece.

[0030] As a supplementary note, the corner of the light guide plate 30 may be provided with positioning holes 304 so that it can be positioned relative to other components during the assembly process.

[0031] like Figure 2 As shown, the reflective layer 20 forms the reflective surface 302 of the light guide plate 30. The reflective layer 20, for example, can be a white PET sheet, and can reflect the light from the light source 60 upwards. The reflective layer 20 allows the light from the light source 60 to be reflected upwards more completely. However, the reflective layer 20 can be omitted in this invention. In this embodiment, the multiple microstructures 3023 formed by the reflective surface 302 of the light guide plate 30 can also guide light uniformly from the light-emitting surface 303 of the light guide plate 30.

[0032] like Figure 2 As shown, a diffuser 40 is disposed on the light-emitting surface 303 of the light guide plate 30. The diffuser 40 (or diffuser plate) has a frosted surface and its main function is to provide a uniform surface light source. In this embodiment, the diffuser 40 is located between the light guide plate 30 and the pattern layer 50. The substrate of the diffuser 40 is selected from materials with high light transmittance, such as polyethylene terephthalate (PET), polycarbonate (PC), and polymethyl methacrylate (PMMA).

[0033] like Figure 2 and Figure 4As shown, the pattern layer 50 is located on the light exit surface 303 of the light guide plate 30, wherein the pattern layer 50 comprises a light transmission region 51A, and the shape of the light transmission region 51A corresponds to the light exit pattern region 33A of the light guide plate 30. In this embodiment, the pattern layer 50 is made of a non-transparent material, such as a dark MYLAR, or a non-transparent pigment layer. In this embodiment, the light transmission region 51A can be in a hollowed-out shape, in other words, the pattern layer 50 can form a patterned hollowed-out region as the light transmission region 51A. The part outside the patterned hollowed-out region (light transmission region 51A) can be defined as a non-transparent region 51B. The shape of the patterned hollowed-out region corresponds to the light exit pattern region 33A of the light guide plate 30. However, in another possible way, the range of the light exit pattern region 33A of the light guide plate 30 can be slightly larger than the light transmission region 51A (patterned hollowed-out region) of the pattern layer 50. The light transmission region 51A of the present application is not limited to the hollowed-out way, for example, it can be a light transmission material.

[0034] The plurality of light sources 60 are located on one side of the light entrance surface 301 and correspond to the positions of the plurality of slits 34. In addition, the plurality of light sources 60 can be side-emitting type light-emitting diodes, in other words, the illumination direction is parallel to the circuit board 10, not perpendicular to the circuit board 10. The plurality of light sources 60 can each emit different color light. In addition, the plurality of light sources 60 can also have a function such as a marquee. In other words, each light source 60 takes turns to emit different color light.

[0035] This embodiment also includes a plurality of light collecting components 35 arranged on the light entrance surface 301 of the light guide plate 30. The plurality of light collecting components 35 correspond to the positions of the plurality of light entrance regions, and one light collecting component 35 is arranged between two adjacent slits 34. The plurality of light sources 60 are correspondingly located on one side of the plurality of light collecting components 35. In a preferred and possible way, the light collecting component 35 is integrally formed on the light guide plate 30, specifically, the light entrance surface 301 between the two slits 34 is convexly arc-shaped towards the light source 60 as the light collecting component 35. Alternatively, the light source 60 is located at the focal point of the light collecting component 35, so that the light entering the light strip region 36 can become collimated light. In another possible way, the light source 60 itself is provided with a light collecting component, for example, the package of the light-emitting diode forms a convex lens structure. Furthermore, the light collecting component 35 can be an independent component, which is separate from the light guide plate 30 and the light source 60, for example, an independent convex lens, or a sheet-shaped Fresnel lens.

[0036] In this embodiment, the plurality of slits 34 divide the light shielding region 33B into a plurality of light strip regions 36. In addition, the plurality of slits 34 are parallel to each other.

[0037] As shown in FIG. 4, the light guide plate 30 is arranged on the circuit board 10, and the plurality of light sources 60 are arranged on one side of the light guide plate 30. The plurality of light sources 60 are correspondingly arranged on the plurality of light collecting components 35. The plurality of light sources 60 can each emit different color light. In addition, the plurality of light sources 60 can also have a function such as a marquee. In other words, each light source 60 takes turns to emit different color light. Figure 2As shown, the light rays L pass through the light guide plate 30, and within the light shielding area 33B, the light rays L are guided and limited to the light strip area 36 between the two slits 34. The light rays L are blocked by the opaque area 51B of the pattern layer 50, and thus cannot pass through the pattern layer 50. The light rays L continue to advance within the light strip area 36, are reflected upward in the light-out pattern area 33A, and then pass through the light-transmitting area 51A (pattern hollow area) of the pattern layer 50, thereby presenting the pattern effect. As shown in the left upper corner of Fig. 1B, the light rays L can be mixed with each other in the light-out pattern area 33A. Figure 1 As shown, the light beams of each light strip area 36 can be adjacent to each other in the light-out pattern area 33A, and a clear color block can be presented. The pattern appearance cannot see the joint gap throughout the light-out pattern area 33A and the light-transmitting area 51A (pattern hollow area).

[0038] [Second Embodiment]

[0039] As shown, the light rays L pass through the light guide plate 30, and within the light shielding area 33B, the light rays L are guided and limited to the light strip area 36 between the two slits 34. The light rays L are blocked by the opaque area 51B of the pattern layer 50, and thus cannot pass through the pattern layer 50. The light rays L continue to advance within the light strip area 36, are reflected upward in the light-out pattern area 33A, and then pass through the light-transmitting area 51A (pattern hollow area) of the pattern layer 50, thereby presenting the pattern effect. As shown in the left upper corner of Fig. 1B, the light rays L can be mixed with each other in the light-out pattern area 33A. Figure 5 The main difference between the light guide module of the present embodiment and the above-mentioned embodiments is that the starting ends of the plurality of slits 34a of the light guide plate 30a are adjacent to the light-in surface 301 and are radially distributed away from the light-in surface 301. In other words, the widths of the plurality of light strip areas 36a gradually increase.

[0040] The present embodiment shows at least three light-out pattern areas 33A.

[0041] In addition, some of the slits 34a of the present embodiment do not completely penetrate to the top edge (the side edge of the remote light source) of the light guide plate 30a. As shown in the left upper corner of Fig. 2B, a light mixing area 33X can be referred to, which is located at the end of some of the slits 34a. After the light rays enter the light mixing area 33X from the plurality of light strip areas 36a, the light rays can be mixed with each other. The light-out pattern area 33A is located between the light mixing area 33X and the light-in surface 301. Figure 5

[0042] The length of the light mixing area 33X along the direction of the slits 34a of the present embodiment is greater than the length of the light-out pattern area 33A along the direction of the slits 34a, so that the light rays can be mixed sufficiently in a long enough distance. Specifically, the light mixing area 33X extends to the top edge and the left side edge of the light guide plate 30a.

[0043] [Third Embodiment]

[0044] As shown, the light rays L pass through the light guide plate 30, and within the light shielding area 33B, the light rays L are guided and limited to the light strip area 36 between the two slits 34. The light rays L are blocked by the opaque area 51B of the pattern layer 50, and thus cannot pass through the pattern layer 50. The light rays L continue to advance within the light strip area 36, are reflected upward in the light-out pattern area 33A, and then pass through the light-transmitting area 51A (pattern hollow area) of the pattern layer 50, thereby presenting the pattern effect. As shown in the left upper corner of Fig. 1B, the light rays L can be mixed with each other in the light-out pattern area 33A. Figure 6 The main difference between the light guide module of the present embodiment and the above-mentioned embodiments is that the starting ends of the plurality of slits 34a of the light guide plate 30a are adjacent to the light-in surface 301 and are radially distributed away from the light-in surface 301. In other words, the widths of the plurality of light strip areas 36a gradually increase.

[0045] In addition, some of the slits 34a of the present embodiment do not completely penetrate to the top edge (the side edge of the remote light source) of the light guide plate 30a. As shown in the left upper corner of Fig. 2B, a light mixing area 33X can be referred to, which is located at the end of some of the slits 34a. After the light rays enter the light mixing area 33X from the plurality of light strip areas 36a, the light rays can be mixed with each other. The light-out pattern area 33A is located between the light mixing area 33X and the light-in surface 301. Figure 6 ​As shown in the upper left corner of FIG. 1, a mixing light area 33X, which is located at the end of some of the slits 34b, can be called a mixing light area 33X. After the light rays enter the mixing light area 33X from the plurality of light bar areas 36b, the light rays can gradually mix.

[0046] The light guide module and the light guide plate provided by the utility model can make different colors of light clearly separate and move forward, and the display efficiency can present each section of color light in succession in the light emission pattern area and the pattern hollow area of the pattern layer without being affected by the slits. The appearance will not present a joint gap.

[0047] On the other hand, the slits of the light guide plate provided by the utility model can not extend to the top edge of the light guide plate, and a mixing light area is provided, and the light rays can gradually mix. In other words, the light guide module can present a display effect of clearly segmented color light in the light emission pattern area, and can also present a display effect of gradually mixed color light in the mixing light area.

[0048] The above disclosed content is only a feasible embodiment of the utility model, and does not limit the scope of the utility model, so equivalent changes and modifications made by applying the content of the utility model specification and drawings are included in the protection scope of the utility model.

Claims

1. A light guide module, characterized by The light guide plate comprises an incident light surface, an emitting light surface and a reflecting surface, the reflecting surface and the emitting light surface are opposite to each other, the incident light surface and the emitting light surface are perpendicular to each other and have a plurality of incident light areas, the emitting light surface of the light guide plate is divided into an emitting light pattern area and a light shielding area, the light guide plate forms a plurality of cutting seams, part of the cutting seams pass through the light shielding area, and part of the cutting seams are discontinuous due to being separated by the emitting light pattern area. A pattern layer is located on the emitting light surface of the light guide plate, and the pattern layer comprises a light-transmitting area, the shape of the light-transmitting area corresponds to the emitting light pattern area of the light guide plate. A plurality of light sources are arranged on one side of the incident light surface and correspond to the plurality of incident light areas. The starting ends of the plurality of cutting seams are adjacent to the incident light surface and radiate or converge away from the incident light surface. The light guide plate further forms a light mixing area, part of the light mixing area is located at the ends of the plurality of cutting seams, and the emitting light pattern area is located between the light mixing area and the incident light surface.

2. The light guide module of claim 1, wherein, A plurality of light collecting components are arranged on the incident light surface, the plurality of light collecting components correspond to the positions of the plurality of incident light areas, one light collecting component is arranged between two adjacent cutting seams, and the plurality of light sources correspondingly are located on one side of the plurality of light collecting components.

3. The light guide module of claim 2, wherein, A diffusion sheet is arranged on the emitting light surface of the light guide plate, and the diffusion sheet is located between the light guide plate and the pattern layer.

4. The light guide module according to any one of claims 1 to 3, characterized in that, The plurality of cutting seams separate the light shielding area into a plurality of strip-shaped light strips.

5. The light guide module of claim 4, wherein, The plurality of cutting seams are parallel to each other.

6. The light guide module of any one of claims 1 to 3, wherein, The pattern layer is made of a light-blocking material, and the part of the pattern layer other than the light-transmitting area is defined as a light-blocking area.

7. The light guide module of any one of claims 1 to 3, wherein, The light guide plate comprises an incident light surface, an emitting light surface and a reflecting surface, the reflecting surface and the emitting light surface are opposite to each other, the incident light surface and the emitting light surface are perpendicular to each other and have a plurality of incident light areas, the emitting light surface of the light guide plate is divided into an emitting light pattern area and a light shielding area, the light guide plate forms a plurality of cutting seams, part of the cutting seams pass through the light shielding area, and part of the cutting seams are discontinuous due to being separated by the emitting light pattern area.

8. The light guide module of any one of claims 1 to 3, wherein, A plurality of light collecting components are arranged on the incident light surface, two adjacent cutting seams are arranged between one light collecting component.

9. A light guide plate, characterized by, The starting ends of the plurality of cutting seams are adjacent to the incident light surface and radiate or converge away from the incident light surface. The reflecting surface further comprises a plurality of microstructures, and the light beams are reflected by the plurality of microstructures and then transmitted through the emitting light pattern area. ​ ​ ​ ​ 10. The light guide plate according to claim 9, wherein ​ 11. The light guide plate according to claim 9, wherein ​ 12. The light guide plate according to claim 9, wherein ​

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