CN111965751B - High-reflectivity LED backlight source for micro display - Google Patents
High-reflectivity LED backlight source for micro display Download PDFInfo
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- CN111965751B CN111965751B CN202010954568.2A CN202010954568A CN111965751B CN 111965751 B CN111965751 B CN 111965751B CN 202010954568 A CN202010954568 A CN 202010954568A CN 111965751 B CN111965751 B CN 111965751B
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- shell
- refraction
- led lamp
- light guide
- diffusion sheet
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to a high-reflectivity LED backlight source for micro display, which effectively solves the problems that edge-dissipated light cannot be effectively utilized, the brightness of a surface light source is uneven and the utilization rate of light of the light source is low in the prior art; the technical scheme includes that the LED lamp comprises a shell, a plurality of LED lamp groups are arranged on the bottom surface inside the shell, each LED lamp group comprises a plurality of LED lamps, lower refraction arcs fixedly connected to the bottom surface of the shell are arranged between every two adjacent LED lamps in the same LED lamp group, reflection triangular prisms fixedly connected to the bottom surface of the shell are arranged between every two adjacent LED lamp groups, a diffusion sheet detachably connected in the shell is arranged above the LED lamp groups, a plurality of large refraction arcs and small refraction arcs are fixedly connected to one end, facing the bottom surface of the shell, of the diffusion sheet, a brightness enhancement film is detachably connected to the upper portion of the diffusion sheet, and a light guide plate is detachably connected to the upper portion of the brightness enhancement film; the invention has simple structure, can effectively improve the utilization rate of the light source, ensures the uniform brightness of the formed surface light source and has strong practicability.
Description
Technical Field
The invention relates to the technical field of backlight sources, in particular to a high-reflectivity LED backlight source for micro display.
Background
Nowadays, many electronic products are integrated into people's lives, such as most common mobile phones, computers, televisions, etc., so that the demand for backlight sources is increasing, the backlight sources mainly include three backlight source types of EL, CCFL and LED according to the light source type at present, and the LED backlight is popular in the market today with unique characteristics of high photoelectric conversion efficiency, high color saturation, small volume, impact resistance, low-voltage power supply, long service life, etc., and the demand is also increasing. The backlight source mainly comprises a light source, a light guide plate, an optical film and a structural member, wherein the optical film comprises a brightness enhancement film, a diffusion film and black and white glue, and the black and white glue is mainly used for preventing light at the edge of the backlight source from dissipating.
The existing LED backlight adopts LED lamp point light sources, the point light source divergence type characteristic causes that partial loss occurs before light passes through a light guide plate and an optical film, namely, the light source cannot completely irradiate on the optical film, and the irradiation brightness is uneven because the divergence type characteristic of the light source and the interference between adjacent light sources exist.
In summary, the conventional LED backlight has the following disadvantages:
1. the light rays dissipated from the edges are shielded by black and white glue, so that the light rays of the light source are wasted;
2. the brightness of the formed surface light source is uneven;
3. the utilization rate of light of the light source is low.
Therefore, the present invention provides a high-reflectivity LED backlight for micro-display to solve the above problems.
Disclosure of Invention
In view of the above situation, in order to overcome the defects in the prior art, the invention provides a high-reflectivity LED backlight for micro display, which effectively solves the problems in the prior art that edge-emitted light cannot be effectively utilized, the brightness of a surface light source is uneven, and the utilization rate of light of the light source is low.
The LED lamp comprises a shell, wherein a plurality of LED lamp groups are uniformly and fixedly connected to the bottom surface in the shell, each LED lamp group comprises a plurality of LED lamps which are uniformly and fixedly connected to the bottom surface in the shell in the same row, lower refraction arcs fixedly connected to the bottom surface of the shell are arranged between every two adjacent LED lamps in the same LED lamp group, reflection triangular prisms fixedly connected to the bottom surface of the shell are arranged between every two adjacent LED lamp groups, a diffusion sheet detachably connected in the shell is arranged above each LED lamp group, a plurality of large refraction arcs and small refraction arcs are fixedly connected to one end, facing the bottom surface of the shell, of the diffusion sheet, and a light guide plate is detachably connected to the upper part of the diffusion sheet;
every big refraction arc be located every LED lamp directly over respectively, every little refraction arc be located respectively directly over the lower refraction arc, big refraction arc central angle and radius all be less than little refraction arc.
Preferably, one end of the diffusion sheet facing the bottom surface of the shell is fixedly connected with a plurality of wedge-shaped refraction columns, and each wedge-shaped refraction column is respectively positioned right above each reflection triangular prism.
Preferably, the inner side wall of the shell is provided with a light guide groove, the lower edge of the light guide groove is flush with the lower end face of the diffusion sheet, the upper edge of the light guide groove is flush with the upper end face of the light guide plate, and the inner wall of the light guide groove is composed of two mutually perpendicular reflecting faces.
Preferably, the intersected edge of the bottom surface and the side wall in the shell is integrally connected with a reflecting prism.
Preferably, a brightness enhancement film is detachably connected above the diffusion sheet, and a light guide plate is detachably connected above the brightness enhancement film.
The invention improves the problems that the edge dissipated light can not be effectively utilized, the surface light source brightness is uneven and the light source light utilization rate is low in the prior art, and is provided with the reflecting prism, the light guide groove and the reflecting surface, so that the light dissipated from the edges of the light guide plate, the diffusion sheet and the brightness enhancement film can return to the light guide plate again to be emitted through total reflection and diffuse reflection; the reflection type surface light source is simple in structure, the utilization rate of the light source can be effectively improved, the brightness uniformity of the formed surface light source is guaranteed, and the practicability is high.
Drawings
Fig. 1 is a perspective view of the present invention.
FIG. 2 is a schematic cross-sectional view of the present invention.
FIG. 3 is a partial cross-sectional view of a light guide groove according to the present invention.
Fig. 4 is a perspective view of the internal structure of the housing of the present invention.
FIG. 5 is a perspective view of the diffuser of the present invention.
FIG. 6 is a schematic cross-sectional view of a diffuser of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying drawings, in which FIGS. 1 to 6 are shown. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
In the description of the present invention, it is to be understood that the terms "upper", "middle", "outer", "inner", and the like, indicate orientations or positional relationships, are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The embodiment I is characterized by comprising a shell 1, wherein the shell 1 is used for providing a fixed foundation for a subsequent structure, the shape of the shell 1 can be set according to the size of a screen matched with the shell, a plurality of LED lamp groups 2 are uniformly and fixedly connected to the bottom surface in the shell 1, each LED lamp group 2 comprises a plurality of LED lamps 3 uniformly and fixedly connected to the bottom surface in the shell 1 in the same row, referring to FIG. 4, each LED lamp group 2 is a vertical LED lamp 3 strip, each LED lamp group 2 comprises a plurality of LED lamps 3 uniformly and vertically arranged, each LED lamp 3 strip is fixed to the bottom surface of the shell 1, a certain distance exists between each LED lamp 3 and the bottom surface of the shell 1, the distance is the thickness of the lamp strip, so that the subsequent structure can guide light rays scattered around the LED lamps 3, a lower refraction arc 4 fixedly connected to the bottom surface of the shell 1 is arranged between adjacent LED lamps 3 in the same LED lamp group 2, the refraction arc 4 is a solid arc surface, the refraction arc 4 can enable light rays with a smaller included angle between the LED lamp 3 and the horizontal plane to irradiate on the refraction arc 4 and vertically irradiate upwards under the action of the refraction arc 4, thereby preventing the waste caused by the fact that the light rays with the smaller included angle between the periphery of the LED lamp 3 and the horizontal plane cannot irradiate upwards, a reflection triangular prism 5 fixedly connected with the bottom surface of the shell 1 is arranged between the adjacent LED lamp sets 2, the reflection triangular prism 5 is a solid regular triangular prism, the reflection triangular prism 5 is used for enabling the light rays with the smaller included angle between the LED lamp 3 and the horizontal plane to be upwards turned and vertically upwards emitted when the reflection triangular prism 5 is photographed, the light rays dissipated around the LED lamp 3 are all refracted to be vertically upwards under the action of the reflection triangular prism 5 and the refraction arc 4 and form a surface light source to be projected on the display screen through a subsequent structure, a diffusion sheet 6 detachably connected in the shell 1 is arranged above the LED lamp sets 2, the LED lamp comprises a diffusion sheet 6, a plurality of large refraction arcs 7 and small refraction arcs 8 are fixedly connected to one end, facing the bottom surface of a shell 1, of the diffusion sheet 6, the diffusion sheet 6 is used for diffusing light irradiated by an LED lamp 3 and light refracted by a reflection triangular prism 5 and a refraction arc 4 uniformly and forming a surface light source to be projected on a display screen, a brightness enhancement film 9 is detachably connected to the upper portion of the diffusion sheet 6, a light guide plate 10 is detachably connected to the upper portion of the brightness enhancement film 9, the brightness enhancement film 9 is arranged to gather light emitted by a light source to the direction of the light guide plate 10 to enhance brightness, the light guide plate 10 enables the light to form a uniform surface light source to be projected on the display screen, a plurality of light guide points are fixedly connected to one side surface of the bottom surface of the shell 1 uniformly and far away from the light guide plate 10, the light guide plate 10 and the light guide points are both optical-level acrylic plates, and the optical level acrylic plates absorb the light emitted from the LED lamp 3, when light rays irradiate each light guide point, reflected light can be diffused towards each angle, then reflection conditions are destroyed, the reflected light is emitted from the upper side surface of the light guide plate 10, and the light guide plate 10 can uniformly emit light through various light guide points with different densities and sizes, so that the brightness of a screen display image is ensured to be uniform;
referring to fig. 2, 5 and 6, each large refraction arc 7 is located right above each LED lamp 3, the large refraction arc 7 is arranged to make the light emitted by the LED lamp 3 enter the diffusion sheet 6 and then undergo a diffuse reflection in advance, so as to achieve the effect of preprocessing the light with uniform distribution, each small refraction arc 8 is located right above the lower refraction arc 4, and the small refraction arc 8 is arranged to make the light refracted by the refraction arc 4 undergo a diffuse reflection in advance after entering the diffusion sheet 6, so as to achieve the effect of preprocessing the light with uniform distribution, the central angle and radius of the large refraction arc 7 are smaller than those of the small refraction arc 8, specifically, the distance from the lowest point of the large refraction arc 7 to the highest point of the LED lamp 3 is the same as the distance from the lowest point of the small refraction arc 8 to the highest point of the refraction arc 4;
Second embodiment, on the basis of the first embodiment, in the process that light enters the light guide plate 10 after entering the diffusion sheet 6 from below, the light will be subjected to diffuse reflection and total reflection under the action of the light guide plate 10, the light guide points, the diffusion plate, the large refraction arcs 7, the small refraction arcs 8 and the wedge-shaped refraction columns 11, so that part of the light will finally escape from the side surfaces of the light guide plate 10 and the diffusion sheet 6, in this embodiment, a specific structure is provided to converge and reuse the light source that escapes from the side surfaces, specifically, referring to fig. 3, the inner side wall of the housing 1 is provided with a light guide groove 12, the lower edge of the light guide groove 12 is flush with the lower end surface of the diffusion sheet 6, the upper edge of the light guide groove 12 is flush with the upper end surface of the light guide plate 10, the inner wall of the light guide groove 12 is composed of two mutually perpendicular reflection surfaces 13, and this arrangement can make the light that escapes from the diffusion sheet 6 through diffuse reflection and multiple total reflection in the light guide plate 10 and the diffusion sheet 6 enter the light guide groove 12, under the action of the two mutually perpendicular reflecting surfaces 13, the light enters the light guide plate 10 or the diffusion sheet 6 again through multiple reflections, so that the loss of light is prevented, and the utilization rate of the light source of the LED lamp 3 is improved.
Third embodiment, on the basis of the first embodiment, the edge of the inner bottom surface and the intersecting side wall of the outer shell 1 is integrally connected with a reflecting prism 14, and referring to fig. 4 and 5, the arrangement can enable the light rays emitted by the LED lamp 3 at the inner edge of the outer shell 1 and having a smaller included angle with the horizontal plane to irradiate on the reflecting prism 14 and reflect upwards, so that the light rays enter the diffusion sheet 6 at a large vertical or horizontal angle.
When the LED light source is used specifically, light generated by the LED lamp 3 enters the diffusion sheet 6 under the action of the refraction arc 4, the reflection triangular prism 5, the large refraction arc 7 and the small refraction arc 8, is uniformly emitted from the diffusion sheet 6 under the action of the large refraction arc 7 and the small refraction arc 8, enters the light guide plate 10 through the brightness enhancement film 9, and forms a uniform surface light source under the action of the light guide plate 10 and the light guide points to be projected on a display screen;
when the light is diffused and totally reflected several times in the light guide plate 10 and the diffusion sheet 6 and then emitted from the side, the emitted light enters the light guide groove 12 and re-enters the light guide plate 10 or the diffusion sheet 6 after being reflected several times under the action of the two mutually perpendicular reflection surfaces 13.
It should be noted that the refraction arcs 4, the diffusion sheet 6, the large refraction arcs 7, the small refraction arcs 8, the light guide plate 10, and the light guide points are all made of acrylic plates.
The invention improves the problems that edge dissipated light cannot be effectively utilized, the surface light source has uneven brightness and the light source light utilization rate is low in the prior art, and the light guide plate, the light guide groove and the light reflection surface are arranged, so that the light dissipated from the edges of the light guide plate, the diffusion sheet and the brightness enhancement film can return to the light guide plate again to be emitted through total reflection and diffuse reflection; the reflection arc and the reflection triangular prism are arranged, so that light rays emitted to the periphery of the point light source can be finally emitted to the light guide plate through reflection, the utilization rate of the light source is improved, and the uniformity of the brightness of the light source of the emitting surface is ensured.
Claims (5)
1. The high-reflectivity LED backlight source for the micro display is characterized by comprising a shell (1), wherein a plurality of LED lamp groups (2) are fixedly connected with the inner bottom surface of the shell (1) uniformly, each LED lamp group (2) comprises a plurality of LED lamps (3) which are fixedly connected with the inner bottom surface of the shell (1) uniformly in a row, a lower refraction arc (4) fixedly connected with the bottom surface of the shell (1) is arranged between every two adjacent LED lamps (3) in the same LED lamp group (2), a reflection triangular prism (5) fixedly connected with the bottom surface of the shell (1) is arranged between every two adjacent LED lamp groups (2), a diffusion sheet (6) detachably connected into the shell (1) is arranged above the LED lamp groups (2), and the diffusion sheet (6) is fixedly connected with a plurality of large refraction arcs (7) and small refraction arcs (8) towards one end of the bottom surface of the shell (1), a light guide plate (10) is detachably connected above the diffusion sheet (6);
every big refraction arc (7) be located every LED lamp (3) directly over respectively, every little refraction arc (8) be located respectively directly over lower refraction arc (4), big refraction arc (7) central angle and radius all be less than little refraction arc (8).
2. The LED backlight source with high reflectivity for the miniature display as set forth in claim 1, wherein one end of the diffusion sheet (6) facing the bottom surface of the housing (1) is fixedly connected with a plurality of wedge-shaped refraction columns (11), and each wedge-shaped refraction column (11) is respectively positioned right above each reflective triangular prism (5).
3. The high-reflectivity LED backlight source for the micro-display according to claim 1, wherein a light guide groove (12) is formed in the inner side wall of the shell (1), the lower edge of the light guide groove (12) is flush with the lower end face of the diffusion sheet (6), the upper edge of the light guide groove (12) is flush with the upper end face of the light guide plate (10), and the inner wall of the light guide groove (12) is composed of two mutually perpendicular reflection faces (13).
4. The high-reflectivity LED backlight source for the miniature display as set forth in claim 1, wherein a reflecting prism (14) is integrally connected to the edge of the housing (1) where the bottom surface and the side wall intersect.
5. The LED backlight source with high reflectivity for micro-display as claimed in claim 1, wherein a brightness enhancement film (9) is detachably connected above the diffusion sheet (6), and a light guide plate (10) is detachably connected above the brightness enhancement film (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010954568.2A CN111965751B (en) | 2020-09-11 | 2020-09-11 | High-reflectivity LED backlight source for micro display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010954568.2A CN111965751B (en) | 2020-09-11 | 2020-09-11 | High-reflectivity LED backlight source for micro display |
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| Publication Number | Publication Date |
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| CN111965751A CN111965751A (en) | 2020-11-20 |
| CN111965751B true CN111965751B (en) | 2022-08-30 |
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| CN202010954568.2A Active CN111965751B (en) | 2020-09-11 | 2020-09-11 | High-reflectivity LED backlight source for micro display |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113281019A (en) * | 2021-06-24 | 2021-08-20 | 青岛海科虚拟现实研究院 | Display panel detection device based on VR lens |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101021579A (en) * | 2007-03-13 | 2007-08-22 | 友达光电股份有限公司 | Light source diffusion plate and backlight module |
| CN101118348A (en) * | 2007-09-14 | 2008-02-06 | 友达光电股份有限公司 | Backlight module and diffuse transmission module thereof |
| CN202580713U (en) * | 2012-03-14 | 2012-12-05 | 昆山市诚泰电气股份有限公司 | Flat light-emitting diode (LED) lamp |
| CN203731289U (en) * | 2013-12-31 | 2014-07-23 | 京东方光科技有限公司 | LED lamp strips, backlight module and display device |
| CN205842297U (en) * | 2016-07-09 | 2016-12-28 | 深圳市赛维斯光电有限公司 | A kind of LED backlight |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM290572U (en) * | 2005-09-30 | 2006-05-11 | Radiant Opto Electronics Corp | Light-uniformizing elements for area light source |
| JP6406053B2 (en) * | 2015-02-24 | 2018-10-17 | オムロン株式会社 | Light guide and light emitting device |
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2020
- 2020-09-11 CN CN202010954568.2A patent/CN111965751B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101021579A (en) * | 2007-03-13 | 2007-08-22 | 友达光电股份有限公司 | Light source diffusion plate and backlight module |
| CN101118348A (en) * | 2007-09-14 | 2008-02-06 | 友达光电股份有限公司 | Backlight module and diffuse transmission module thereof |
| CN202580713U (en) * | 2012-03-14 | 2012-12-05 | 昆山市诚泰电气股份有限公司 | Flat light-emitting diode (LED) lamp |
| CN203731289U (en) * | 2013-12-31 | 2014-07-23 | 京东方光科技有限公司 | LED lamp strips, backlight module and display device |
| CN205842297U (en) * | 2016-07-09 | 2016-12-28 | 深圳市赛维斯光电有限公司 | A kind of LED backlight |
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| CN111965751A (en) | 2020-11-20 |
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