CN105572792A - Light guide plate - Google Patents
Light guide plate Download PDFInfo
- Publication number
- CN105572792A CN105572792A CN201610150056.4A CN201610150056A CN105572792A CN 105572792 A CN105572792 A CN 105572792A CN 201610150056 A CN201610150056 A CN 201610150056A CN 105572792 A CN105572792 A CN 105572792A
- Authority
- CN
- China
- Prior art keywords
- light
- light guide
- guide plate
- frustum cone
- cone structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- G02B6/0055—Reflecting element, sheet or layer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to a light guide plate comprising a bottom surface and a light emergent surface which is back to the bottom surface. The bottom surface is convexly provided with multiple circular truncated cone structures. The mesas of the circular truncated cone structures are provided with light guide spots. Multiple circular truncated cone structures are arranged on the bottom surface of the light guide plate and the light guide spots are arranged on the mesas of the circular truncated cone structures. When light rays irradiate to the light guide spots, diffuse reflection is formed and the light rays are scattered in all directions, a part of light rays irradiate to the side surface of the circular truncated cone structures, and all the light rays are reflected out of the upper surface of the light guide plate from the circular truncated cone structures according to the principle of total reflection. The light rays are reflected for multiple times in the process so that generation of glare can be effectively prevented. The light guide spots generating diffuse reflection are equivalent to light-emitting light source surfaces, and the circular truncated cone structures are equivalent to total reflection lenses so that the light emergent angle of the light rays can be controlled, and thus small-angle light emergency of the light guide plate can be realized and forward brightness of the light guide plate can be effectively enhanced.
Description
Technical field
The present invention relates to optical technical field, is a kind of light guide plate specifically.
Background technology
The principle of work of existing light guide plate is as shown in Figure 1: light source 1 enters light from light guide plate 2 side, and the light 3 that light source 1 sends constantly reflects in light guide plate 2 inside according to total reflection law.When the site (i.e. light guiding points 20) that light 3 is irradiated to light guide plate 2 lower surface is upper, conditioned reflex is destroyed, and light 3 will form diffuse reflection, to all directions scattering, the light now not meeting total reflection law according to refraction law, will penetrate from the upper surface of light guide plate 2.Light is inner through countless refractions, reflection in light guide plate, finally in light guide plate, forms uniform light-emitting area.Because the lighting angle of this light guide plate is comparatively large, there is uniformity of luminance and wide-angle, be often positioned as the replacement product of fluorescent tube, be widely used on panel light and lamp box.But just because of the characteristic of its luminous wide-angle, make the light of existing light guide plate concentrated not, forward luminance shortage, the application of product has limitation.
Number of patent application is 201310018760.0, patent name is the Chinese invention patent of " light guide plate ", disclose a kind of light conducting plate structure promoting the forward brightness of light guide plate: the bottom surface of light guide plate is distributed with multiple scattering point, be provided with multiple V-type microstructure with on the exiting surface that bottom surface is opposing.The light guide plate of this structure easily produces glare problem while improving brightness: because V-type microstructure is mainly the total reflection destroying light transmition, make the light at arrival V-type microstructure place directly can penetrate light guide plate, and light guide plate adopts usually is the transparent resin material of high permeability, the light crossed as reflection, directly by the bright dipping of V-type microstructure, easily will produce glare problem.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, technical matters to be solved by this invention is to provide and a kind ofly can improves the light guide plate that forward brightness can prevent again dazzle.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
A kind of light guide plate, comprises bottom surface and the exiting surface opposing with bottom surface, described bottom surface is protruded and is provided with multiple frustum cone structure, the table top of described frustum cone structure is provided with light guiding points.
Beneficial effect of the present invention is: be different from prior art, the present invention is by arranging multiple frustum cone structure in the bottom surface of light guide plate and arranging light guiding points at the table top of frustum cone structure, when light is irradiated on light guiding points, diffuse reflection will be formed and to all directions scattering, some light will be irradiated on the side (inclined-plane) of frustum cone structure, now according to total reflection principle, light all will reflect the upper surface of light guide plate from frustum cone structure.In this course, light, through multiple reflections, effectively can prevent the generation of dazzle.And now produce irreflexive light guiding points, be equivalent to a luminous surface of light source, and frustum cone structure is equivalent to a total reflection lens, can control the rising angle of light, thus realizes the low-angle bright dipping of light guide plate, effectively promote the forward brightness of light guide plate.Therefore, light guide plate provided by the invention, can improve forward brightness and can prevent dazzle again, have market application foreground very widely.
Accompanying drawing explanation
Figure 1 shows that structure and the optical schematic diagram thereof of existing light guide plate.
Figure 2 shows that the structural representation of the light guide plate of the embodiment of the present invention.
Figure 3 shows that the optical schematic diagram of the light guide plate of the embodiment of the present invention.
Label declaration: 1-light source; 2-light guide plate; 3-light; 10-bottom surface; 11-exiting surface; 12-incidence surface; 13-frustum cone structure; 14-light guiding points; 15-light source; 16-light; 20-light guiding points.
Embodiment
By describing technology contents of the present invention in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with embodiment.
The design of most critical of the present invention is: arrange multiple frustum cone structure in the bottom surface of light guide plate and arrange light guiding points at the table top of frustum cone structure.
Concrete, please refer to shown in Fig. 2 and Fig. 3, light guide plate provided by the invention, comprise bottom surface 10 and the exiting surface 11 opposing with bottom surface 10, described bottom surface 10 is protruded and is provided with multiple frustum cone structure 13, the table top of described frustum cone structure 13 is provided with light guiding points 14.
In the above-described embodiments, the material of frustum cone structure 13 is identical with the material of light guide plate, existing known any one can be adopted to make for the transparent resin material making the high permeability of light guide plate, the polymethylmethacrylate (PMMA), polycarbonate (PC) etc. of such as optical grade.Frustum cone structure 13 can with light guide plate one-body molded or shaping separately after be compound in again on the bottom surface of light guide plate.Preferably, the present invention adopts integrated job operation, namely in the bottom surface of light guide plate one-body molded go out frustum cone structure 13.Light guiding points 14 can adopt existing process technology to be arranged on the table top of frustum cone structure 13, such as serigraphy, laser engraving, punching block injection moulding etc.
In the above-described embodiments, the table top of frustum cone structure 13 is provided with a light guiding points 14, this light guiding points 14 is arranged on the center of table top.
Shown in Fig. 3, the optical principle of light guide plate of the present invention is as follows:
The light 16 sent when light source 15 is from side (the i.e. incidence surface 12 of light guide plate, connect bottom surface 10 and exiting surface 11) when entering light guide plate and be irradiated on light guiding points 14, diffuse reflection will be formed and to all directions scattering, some light will be irradiated on the side (inclined-plane) of frustum cone structure 13, now according to total reflection principle, light all will reflect the upper surface (i.e. exiting surface 11) of light guide plate from frustum cone structure 13.In this course, light, through multiple reflections, effectively can prevent the generation of dazzle.And now produce irreflexive light guiding points 14, be equivalent to a luminous surface of light source, and frustum cone structure 13 is equivalent to a total reflection lens, can control the rising angle of light, thus realizes the low-angle bright dipping of light guide plate, effectively promote the forward brightness of light guide plate.
From foregoing description, beneficial effect of the present invention is: by arranging multiple frustum cone structure in the bottom surface of light guide plate and arranging light guiding points at the table top of frustum cone structure, can improve forward brightness and can prevent dazzle again, have market application foreground very widely.
Further, the angle α of the relative two sides of described frustum cone structure 13 is 84 degree ~ 130 degree.Checking shows by experiment, when angle α is greater than 84 degree, light can be totally reflected on the side of frustum cone structure 13, thus the diffuse light be radiated on the side of frustum cone structure 13 can all be reflected, prevent light from the side leakage of frustum cone structure 13, reduce light loss, thus obtain higher light emission rate and forward brightness.And angle α can not be excessive, should be less than 130 degree, no person's slope is crossed senior general and is caused frustum cone structure 13 wide, affects light light emission rate and rising angle, reduces forward brightness.
From foregoing description, beneficial effect of the present invention is: control at 84 degree ~ 130 degree by the angle α of the relative two sides by frustum cone structure, can obtain best light emission rate and forward brightness.
Further, described multiple frustum cone structure 13 is evenly distributed on described bottom surface 10 to arrangement in matrix.
From foregoing description, beneficial effect of the present invention is: by being that matrix is evenly distributed on described bottom surface with arranging by multiple frustum cone structure, can make the uniform in light emission of light guide plate.
Further, the spacing size of adjacent two frustum cone structures 13 controls to be as the criterion being mutually connected with the bright dipping hot spot of these two frustum cone structures 13.In practical application, the spacing size of adjacent two frustum cone structures 13 can design according to the size of single frustum cone structure 13 and lighting angle, the bright dipping hot spot of adjacent two frustum cone structures 13 is connected mutually, and light guide plate entirety produces homogeneous hot spot, uniform in light emission.
Please refer to shown in Fig. 2 and Fig. 3, embodiments of the invention one are:
A kind of light guide plate, comprises bottom surface 10 and the exiting surface 11 opposing with bottom surface 10, described bottom surface 10 is protruded and is provided with multiple frustum cone structure 13, the table top of described frustum cone structure 13 is provided with a light guiding points 14.The angle α of the relative two sides of described frustum cone structure 13 is 84 degree ~ 130 degree.Described multiple frustum cone structure 13 is evenly distributed on described bottom surface 10 to arrangement in matrix.The spacing size of adjacent two frustum cone structures 13 controls to be as the criterion being mutually connected with the bright dipping hot spot of these two frustum cone structures 13.
In sum, light guide plate provided by the invention, by arranging multiple frustum cone structure in the bottom surface of light guide plate and arranging light guiding points at the table top of frustum cone structure, can improve forward brightness and can prevent dazzle again, have market application foreground very widely.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing instructions of the present invention and accompanying drawing content to do, or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. a light guide plate, comprises bottom surface and the exiting surface opposing with bottom surface, it is characterized in that: described bottom surface is protruded and is provided with multiple frustum cone structure, the table top of described frustum cone structure is provided with light guiding points.
2. light guide plate according to claim 1, is characterized in that: the angle of the relative two sides of described frustum cone structure is 84 degree ~ 130 degree.
3. light guide plate according to claim 1, is characterized in that: described multiple frustum cone structure is that matrix is evenly distributed on described bottom surface with arranging.
4. light guide plate according to claim 1, is characterized in that: the spacing size of adjacent two frustum cone structures controls to be as the criterion being mutually connected with the bright dipping hot spot of these two frustum cone structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150056.4A CN105572792A (en) | 2016-03-16 | 2016-03-16 | Light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150056.4A CN105572792A (en) | 2016-03-16 | 2016-03-16 | Light guide plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105572792A true CN105572792A (en) | 2016-05-11 |
Family
ID=55883122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610150056.4A Pending CN105572792A (en) | 2016-03-16 | 2016-03-16 | Light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105572792A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107501A (en) * | 2017-12-06 | 2018-06-01 | 许江珂 | A kind of convex laser-activated liquid crystal cells display light guide plate |
| CN111487709A (en) * | 2020-05-12 | 2020-08-04 | 合肥通泰光电科技有限公司 | Light guide plate capable of emitting light uniformly and lamp thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1506699A (en) * | 2002-12-11 | 2004-06-23 | 鸿富锦精密工业（深圳）有限公司 | Ligh conducting plate |
| JP2004325647A (en) * | 2003-04-23 | 2004-11-18 | Sharp Corp | Display element |
| CN101261338A (en) * | 2007-03-06 | 2008-09-10 | 鸿富锦精密工业（深圳）有限公司 | Light guide board and method for making same |
| CN201764410U (en) * | 2010-09-20 | 2011-03-16 | 昆山龙腾光电有限公司 | Prism lens and backlight module unit adopting the same |
-
2016
- 2016-03-16 CN CN201610150056.4A patent/CN105572792A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1506699A (en) * | 2002-12-11 | 2004-06-23 | 鸿富锦精密工业（深圳）有限公司 | Ligh conducting plate |
| JP2004325647A (en) * | 2003-04-23 | 2004-11-18 | Sharp Corp | Display element |
| CN101261338A (en) * | 2007-03-06 | 2008-09-10 | 鸿富锦精密工业（深圳）有限公司 | Light guide board and method for making same |
| CN201764410U (en) * | 2010-09-20 | 2011-03-16 | 昆山龙腾光电有限公司 | Prism lens and backlight module unit adopting the same |
Non-Patent Citations (1)
| Title |
|---|
| 胡梅霞: "《浅析镜面反射与漫反射》", 《初中生世界（八年级物理）》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107501A (en) * | 2017-12-06 | 2018-06-01 | 许江珂 | A kind of convex laser-activated liquid crystal cells display light guide plate |
| CN111487709A (en) * | 2020-05-12 | 2020-08-04 | 合肥通泰光电科技有限公司 | Light guide plate capable of emitting light uniformly and lamp thereof |
| CN111487709B (en) * | 2020-05-12 | 2022-03-11 | 合肥通泰光电科技有限公司 | Light guide plate capable of emitting light uniformly and lamp thereof |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160511 |
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| RJ01 | Rejection of invention patent application after publication |