Backlight illumination module and illumination device
By combining the design of light source, collimation element, light amplification element, reflection element and diffusion element, the problems of dark seams and bright lines in the splicing of backlight module are solved, achieving uniform light distribution and volume reduction, and improving brightness uniformity.
Patent Information
- Application Number
- CN202520494886.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-20
AI Technical Summary
Existing backlight modules have issues with dark seams and bright lines at the splicing points, and are also relatively large in size, making it difficult to meet the requirements of small size, light weight, high luminous efficiency, uniform luminous emission, and brightness.
The design employs a combination of light source, collimating element, light amplifying element, reflective element, and diffuser element. The light emitted by the light source is focused into a collimated beam by the collimating element, then totally reflected and diffused into a diffused beam by the light amplifying element, and finally reflected by the reflective element to the diffuser element for uniform light distribution.
It achieves uniform light distribution, reduces hidden seams and bright lines, improves brightness uniformity, and reduces the number of parts in a small space, thus reducing the volume occupied.
Smart Images
Figure CN223796794U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lighting technical field especially is related to a backlight illumination module and lighting device. BACKGROUND
[0002] The backlight module is usually applied to liquid crystal display equipment and lighting equipment, with the continuous development of technology, the requirements of the backlight module have the following aspects: small volume, light weight, compact structure, the light source has high luminous efficiency, luminous uniformity and brightness, the existing backlight module is usually composed of a light source and a plurality of reflecting mirrors, which is prone to have splicing dark seams and bright lines, and occupies a large volume, which is difficult to meet the use requirement. SUMMARY
[0003] The utility model discloses a backlight illumination module and lighting device to solve the problem of prior art, improve the light brightness uniformity, reduce the splicing seam, reduce the volume.
[0004] To achieve the above object, the utility model provides the following scheme:
[0005] The utility model provides a backlight illumination module, including light source, collimate element, light spreading element, reflecting element and diffusion element, collimate element sets up in the front end of light source for gathering the light of light source as collimating light beam, light spreading element sets up on the transmission path of collimating light beam, and is used to place between collimate element and shell, light spreading element is used for total reflection to collimating light beam and disperses as light spreading light beam, reflecting element sets up on the transmission path of light spreading light beam, and reflecting element is used to be opposite to the display screen on shell, reflecting element is used for reflecting light spreading light beam as reflection light beam, and the transmission direction of reflection light beam is perpendicular to display screen, diffusion element is used to place in the inside of display screen, diffusion element is perpendicular to reflection light beam, and is used for the light of reflection light beam is even.
[0006] Preferably, the collimating element includes one or more collimating mirrors, each collimating mirror is fixedly provided with the light source on the side away from the light spreading element.
[0007] Preferably, the light spreading element is set as a turning light spreading mirror, the turning light spreading mirror has a turning reflection surface and a light spreading surface, the turning reflection surface is set on the transmission path of the collimating light beam and is used for total reflection of the collimating light beam, and the collimating light beam after total reflection is diverged to the reflecting element through the light spreading surface.
[0008] Preferably, the turning reflection surface is set as a plane, and the light spreading surface is set as a concave surface; or, the turning reflection surface is set as a concave surface, and the light spreading surface is set as a plane.
[0009] Preferably, the light-expanding surface is provided with a microstructure.
[0010] Preferably, the reflecting element is provided as a mirror, and the reflecting surface of the mirror is provided as a concave surface.
[0011] Preferably, the diffusion element is provided as a diffusion plate.
[0012] Preferably, the collimating element is integrally attached to and fixedly connected with the light-expanding element; or, the collimating element is provided separately from the light-expanding element and can be fixed relative to the light-expanding element.
[0013] Preferably, the collimating element, the light-expanding element, the reflecting element and the diffusion element are all arranged in the housing in a detachable manner.
[0014] The utility model also provides a kind of lighting device, including shell and backlighting module as described above, the shell one side is provided with display screen, and the backlighting module is arranged in the shell.
[0015] The utility model relative to prior art obtains following technical effect:
[0016] The backlighting module and the lighting device provided by the utility model, the light source emits light, which is collected by the collimating element into a collimated light beam, then the collimated light beam is totally reflected and expanded by the light-expanding element, the expanded light beam is reflected by the surface of the reflecting element vertically to the diffusion element, and finally the light is emitted to the display screen after being further homogenized by the diffusion element. The entire light emitting surface light beam is uniformly distributed, and the light is emitted to the display screen with a small divergence angle. The light has no splicing dark seam and bright line, and the overall display brightness is high, uniform and color uniform. In addition, since the light-expanding element is arranged between the collimating element and the shell, and the reflecting element is opposite to the display screen on the shell, the collimation and expansion of light and double reflection can be realized in a small space with one light-expanding element, which reduces the number of parts and thus reduces the occupied volume as much as possible under the premise of meeting the use requirements. BRIEF DESCRIPTION OF DRAWINGS
[0017] To more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative effort.
[0018] Figure 1 The axial side view of the backlighting module provided in Embodiment One is shown in the figure.
[0019] Figure 2The schematic diagram of the light path of the backlight module provided in Embodiment One is shown in the figure.
[0020] Figure 3 The schematic diagram of the cooperation of the collimating element and the light-expanding element provided in Embodiment One is shown in the figure.
[0021] Figure 4 The schematic diagram provided in Embodiment One is shown in the figure. Figure 3 The bottom view of the schematic diagram provided in Embodiment One is shown in the figure.
[0022] Figure 5 The schematic diagram of the light-out surface light-out effect of the diffusion element of the backlight module provided in Embodiment One is shown in the figure.
[0023] Figure 6 The schematic diagram of the backlight module provided in Embodiment Two is shown in the figure.
[0024] Figure 7 The bottom view of the collimating element provided in Embodiment Two is shown in the figure.
[0025] In the figure: 1-light source; 2-collimating element; 21-light-in side surface; 22-light-in top surface; 23-light-gathering reflection surface; 3-light-expanding element; 31-turning reflection surface; 32-light-expanding surface; 4-reflecting element; 5-diffusion element; 6-housing; 7-display screen. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0027] The purpose of the present application is to provide a backlight module and a lighting device to solve the problems in the prior art, improve the light-out brightness uniformity, reduce the splicing seams, and reduce the volume.
[0028] To make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be described in further detail below with reference to the drawings and specific embodiments.
[0029] Embodiment One
[0030] The present embodiment provides a backlight module, please refer to Figure 1 and Figure 2, including a light source 1, a collimating element 2, a light-expanding element 3, a reflecting element 4 and a diffusing element 5; the collimating element 2 is arranged at the front end of the light source 1 and is used to gather the light emitted by the light source 1 into a collimated light beam; the light-expanding element 3 is arranged on the transmission path of the collimated light beam and is arranged between the collimating element 2 and the shell 6, the light-expanding element 3 is used to totally reflect the collimated light beam and disperse it into a light-expanding light beam; the reflecting element 4 is arranged on the transmission path of the light-expanding light beam and is used to be opposite to the display screen 7 on the shell 6, the reflecting element 4 is used to reflect the light-expanding light beam into a reflected light beam, and the transmission direction of the reflected light beam is perpendicular to the display screen 7; the diffusing element 5 is arranged inside the display screen 7, the diffusing element 5 is perpendicular to the reflected light beam and is used to homogenize the reflected light beam.
[0031] The light source 1 emits light, which is gathered into a collimated light beam by the collimating element 2, then the collimated light beam is totally reflected and light-expanded by the light-expanding element 3, the light-expanding light beam is reflected by the surface of the reflecting element 4 and vertically irradiated to the diffusing element 5, finally the light is further homogenized by the diffusing element 5 and irradiated to the display screen 7, the whole light beam is uniformly distributed on the light-emitting surface and irradiated to the display screen 7 with a small divergence angle, the light is irradiated to the display screen 7 through the non-spliced dark seam and bright line, the overall display brightness is high, the brightness is uniform, and the color is uniform; in addition, since the light-expanding element 3 is arranged between the collimating element 2 and the shell 5, and the reflecting element 4 is opposite to the display screen 7 on the shell 5, the collimation and light expansion of the light and the double reflection of the light can be realized in a small space, one light-expanding element 3 can realize one reflection and light expansion, the number of parts is reduced, thereby the occupied volume can be reduced as much as possible under the premise of meeting the use requirements.
[0032] In an optional solution of the embodiment, preferably, the collimating element 2 comprises one or more collimating mirrors, and each collimating mirror is fixedly arranged with a light source 1 on the side away from the light-expanding element 3; specifically, the collimating mirror can be a TIR collimating lens, please refer to Figure 2 , which is specifically composed of an incident side surface 21, an incident top surface 22 and a light-converging reflecting surface 23, the light emitted by the light source 1 is Lambertian light distribution, a part of the light is incident to the incident side surface 21, refracted to the light-converging reflecting surface 23 through the incident side surface 21, and collimated light is obtained after being reflected by the light-converging reflecting surface 23, and another part of the light is incident to the incident top surface 22 and directly refracted and irradiated out through the incident top surface 22.
[0033] Specifically, please refer to Figure 3 and Figure 4 , the light source 1 is arranged as a plurality of LED lamp beads in near-Lambertian light type, and is arranged in parallel and corresponds to the plurality of collimating mirrors one by one.
[0034] In an optional solution of the embodiment, preferably, please refer to Figure 2 and Figure 3, the light expanding element 3 is provided as a turning light expander, the turning light expander has a turning reflection surface 31 and a light expanding surface 32, the turning reflection surface 31 is arranged in the transmission path of the collimated light beam and is used for total reflection of the collimated light beam, and the collimated light beam after total reflection is expanded and diverged to the reflection element 4 through the light expanding surface 32; the turning light expander can realize one-time reflection and light expansion, compared with the existing separate arrangement of one reflection element and one light expanding element, the number of parts is reduced, so that the occupied volume can be reduced as much as possible under the premise of meeting the use requirement.
[0035] In an optional solution of the embodiment, preferably, the turning reflection surface 31 is provided as a plane, and the light expanding surface 32 is provided as a concave surface; or, the turning reflection surface 31 is provided as a concave surface, and the light expanding surface 32 is provided as a plane, in this case, the turning reflection surface 31 can reflect and expand light at the same time.
[0036] In an optional solution of the embodiment, preferably, the light expanding surface 32 is provided with a microstructure; specifically, the microstructure can be provided as an abrasive surface or a sawtooth microstructure, so that the collimated light beam forms a uniformly diffused light beam after being emitted from the light expanding element 3.
[0037] In an optional solution of the embodiment, preferably, the reflection element 4 is provided as a mirror, and the reflection surface of the mirror is provided as a concave surface, so that the light expanding beam can be reflected vertically to the diffusion element, improving display brightness, brightness uniformity and color uniformity.
[0038] In an optional solution of the embodiment, preferably, the diffusion element 5 is provided as a diffusion plate to provide a uniform light emitting surface for the display, as shown in Figure 5 .
[0039] In an optional solution of the embodiment, preferably, the collimating element 2 and the light expanding element 3 are integrally attached and fixedly connected, such as integrally injection molded; as shown in Figure 3 , the integrally molded arrangement reduces the number of parts and the occupied space.
[0040] In an optional solution of the embodiment, preferably, the collimating element 2, the light expanding element 3, the reflection element 4 and the diffusion element 5 are all arranged in the housing 6 in a detachable manner; specifically, each element can be connected to the housing 6 through a connecting plate by bolts, the collimating element 2, the light expanding element 3 and the reflection element 4 can be embedded in the connecting plate or a connecting frame, and then connected to the housing 6 by bolts, and the diffusion element 5 can be directly connected to the housing 6 by bolts, so that the arrangement and installation can be facilitated by the detachable arrangement.
[0041] Embodiment Two
[0042] The embodiment provides a backlight illumination module, please refer to Figure 6 and Figure 7The difference between the backlight module provided by the embodiment one and the backlight module provided by the embodiment two is that the collimating mirror is a convex lens, the light source 1 is a plurality of near-Lambert light type LED lamp beads arranged in double rows, and the plurality of collimating mirrors and the plurality of light sources 1 are arranged in one-to-one correspondence.
[0043] The backlight module provided by the embodiment three has the same other structure as the backlight module provided by the embodiment one, and details are not repeated here.
[0044] Embodiment three
[0045] The embodiment provides a lighting device, which comprises a housing 6 and a backlight module as in the embodiment one or the embodiment two, and the housing 6 is provided with a display screen 7 on one side, and the backlight module is arranged in the housing 6.
[0046] The light source 1 emits light, which is collected into a collimated light beam by the collimating element 2, and then the collimated light beam is totally reflected and expanded by the light-expanding element 3, the expanded light beam is reflected by the surface of the reflecting element 4 and vertically irradiated to the diffusing element 5, and finally the light is irradiated to the display screen 7 after being further homogenized by the diffusing element 5, the whole light beam is uniformly distributed on the light emitting surface and irradiated to the display screen 7 at a small divergence angle, the light is irradiated to the display screen 7 without splicing dark seams and bright lines, the overall display brightness is high, the brightness is uniform, and the color is uniform; in addition, since the light-expanding element 3 is arranged between the collimating element 2 and the housing 5, and the reflecting element 4 is opposite to the display screen 7 on the housing 5, the collimation and light expansion and double reflection of the light can be realized in a small space, one light-expanding element 3 can realize one-time reflection and light expansion, the number of parts is reduced, and thus the occupied volume can be reduced as much as possible under the premise of meeting the use requirement.
[0047] The principle and implementation mode of the utility model are described by using specific examples in the utility model, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model. In conclusion, the content of the specification should not be understood as the limitation of the utility model.
Claims
1. A backlight module, characterized in that: The backlight illumination module comprises a light source (1), a collimating element (2), a light-expanding element (3), a reflecting element (4) and a diffusing element (5). The collimating element (2) is arranged at the front end of the light source (1) and is used to concentrate the light emitted by the light source (1) into a collimated light beam. The light-expanding element (3) is arranged on the transmission path of the collimated light beam and is arranged between the collimating element (2) and the housing (6), and is used to totally reflect the collimated light beam and disperse it into a light-expanding light beam. The reflecting element (4) is arranged on the transmission path of the light-expanding light beam, and is arranged opposite to the display screen (7) on the housing (6), and is used to reflect the light-expanding light beam into a reflected light beam, and the transmission direction of the reflected light beam is perpendicular to the display screen (7). The diffusing element (5) is arranged inside the display screen (7), and is perpendicular to the reflected light beam and is used to homogenize the reflected light beam.
2. The backlight module of claim 1, wherein: The collimating element (2) comprises one or more collimating mirrors, and each collimating mirror is fixedly arranged with the light source (1) on the side away from the light-expanding element (3).
3. The backlight module of claim 1, wherein: The light-expanding element (3) is arranged as a turning light-expanding mirror, which has a turning reflecting surface (31) and a light-expanding surface (32), the turning reflecting surface (31) is arranged on the transmission path of the collimated light beam and is used to totally reflect the collimated light beam, and the totally reflected collimated light beam is dispersed to the reflecting element (4) through the light-expanding surface (32).
4. The backlight module of claim 3, wherein: The turning reflecting surface (31) is arranged as a plane, and the light-expanding surface (32) is arranged as a concave surface; or, the turning reflecting surface (31) is arranged as a concave surface, and the light-expanding surface (32) is arranged as a plane.
5. The backlight module of claim 3, wherein: The light-expanding surface (32) is provided with a microstructure on the surface.
6. The backlight module of claim 1, wherein: The reflecting element (4) is arranged as a reflecting mirror, and the reflecting surface of the reflecting mirror is arranged as a concave surface.
7. The backlight module of claim 1, wherein: The diffusing element (5) is arranged as a diffusing plate.
8. The backlight module of claim 1, wherein: The collimating element (2) and the light-expanding element (3) are integrally attached and fixedly connected; or, the collimating element (2) and the light-expanding element (3) are separately arranged and can be fixed relative to each other.
9. The backlight module of claim 1, wherein: The collimating element (2), the light-expanding element (3), the reflecting element (4) and the diffusing element (5) are all arranged in the housing (6) in a detachable manner.
10. An illumination device, characterized by: The backlight illumination module comprises a housing (6) and the backlight illumination module as claimed in any one of claims 1-9, one side of the housing (6) is provided with a display screen (7), and the backlight illumination module is arranged in the housing (6).