CN112711088A - Light guide plate, backlight module and display - Google Patents
Light guide plate, backlight module and display Download PDFInfo
- Publication number
- CN112711088A CN112711088A CN201911016205.8A CN201911016205A CN112711088A CN 112711088 A CN112711088 A CN 112711088A CN 201911016205 A CN201911016205 A CN 201911016205A CN 112711088 A CN112711088 A CN 112711088A
- Authority
- CN
- China
- Prior art keywords
- light
- guide plate
- incident surface
- light guide
- total reflection
- 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
Images
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
- G02B6/005—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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to a light guide plate, a backlight module and a display. The light guide plate is provided with a body, a plurality of concave parts and a plurality of light splitting grooves, wherein the side surface of the body is defined as a light incident surface, the top surface of the body is defined as a light emergent surface, the concave parts are concavely arranged on the light incident surface of the body, the light splitting grooves are arranged on the light emergent surface of the body and respectively correspond to the concave parts, a distance is formed between each light splitting groove and the light incident surface, and each light splitting groove is provided with a light splitting point on one side close to the light incident surface and a total reflection surface which extends from the light splitting point to two sides far away from the light incident surface so as to ensure that part of light entering through the concave parts forms a total reflection effect. Therefore, the light guide plate can effectively reduce the light dark difference between the two luminous bodies so as to reduce the energy dark area.
Description
Technical Field
The present invention relates to a light guide plate, and more particularly, to a light guide plate capable of providing a total reflection effect to a portion of light to reduce a difference in brightness between light sources.
Background
Referring to fig. 6, the conventional backlight module of the lcd mainly uses a light emitter 52 such as a Light Emitting Diode (LED) as a light source, and then the light emitted from the light emitter 52 is uniformly distributed on the entire light guide plate 50 by the light guide plate 50, so as to provide the backlight module for the display panel. However, since the light emitters 52 of the conventional light source are spaced apart from each other, an energy dark region is formed between two adjacent light emitters, and particularly, after light emitted from the light emitters 52 enters the light guide plate 50, the light traveling angle is reduced due to a light refraction phenomenon, thereby increasing the energy dark region. Therefore, further improvement of the conventional light guide plate 50 is required to reduce the occurrence of the energy dark area.
Disclosure of Invention
Therefore, the present inventors have conducted extensive experiments and studies in view of the problem of the energy dark region of the conventional light guide plate, and finally developed an invention capable of improving the conventional defects.
The present invention is directed to a light guide plate, which can reduce the occurrence of energy dark areas, so that the light energy of a light source can be more uniformly distributed on the whole display surface, thereby improving the display effect of a display.
In order to achieve the above object, the present invention provides a light guide plate comprising:
the light source comprises a body, a light source and a light source, wherein the side surface of the body is defined as a light incident surface, and the top surface of the body is defined as a light emergent surface;
a plurality of concave parts which are concavely arranged on the light incident surface of the body; and
the light splitting grooves are arranged on the light emitting surface of the body and respectively correspond to the plurality of concave parts, a distance is formed between each light splitting groove and the light incident surface, and a light splitting point is formed on one side of each light splitting groove close to the light incident surface and a total reflection surface which extends from the light splitting point to two sides away from the light incident surface so as to enable a part of light entering through the concave parts to form a total reflection effect.
By the technical means, the invention can utilize the total reflection surface on each light splitting groove to enable the light emitted by the luminous bodies to enter the body through the light inlet surface of the body, and then a part of light is reflected due to the total reflection principle when reaching the total reflection surface of the corresponding light splitting groove, so that the advancing angle of the light can be increased to enable the part of light to deviate from the light splitting point to advance to enter the energy dark space between the two luminous bodies. Therefore, the energy dark space between the two luminous bodies can be effectively reduced by the part of the reflected light, so that the light emitted by the luminous sources can be more uniformly dispersed on the whole body, and a better backlight effect is provided for the display.
Drawings
Fig. 1 is a partial perspective view of a light guide plate according to the present invention.
Fig. 2 is a partial plan view of the light guide plate of the present invention.
Fig. 3 is a schematic view of the light guide plate of the present invention in operation.
FIG. 4 is a side view schematic of a display of the present invention.
Fig. 5 is a partial top view of another embodiment of the light guide plate of the present invention.
Fig. 6 is a schematic top view of a conventional backlight module.
Detailed Description
Referring to fig. 1 and 2, the light guide plate of the present invention mainly includes a main body 10, a plurality of concave portions 20, and a plurality of light splitting grooves 30.
The side surface of the body 10 is defined as a light incident surface 12, and the top surface of the body 10 is defined as a light emitting surface 14. The plurality of concave portions 20 are concavely disposed on the light incident surface 12 of the body 10, and the plurality of light splitting grooves 30 are disposed on the light emergent surface 14 of the body 10 and respectively corresponding to the plurality of concave portions 20. A distance is formed between each light splitting groove 30 and the light incident surface 12, and each light splitting groove 30 is provided with a light splitting point 32 on one side close to the light incident surface 12 and a total reflection surface 34 extending from the light splitting point 32 to both sides away from the light incident surface 12 so as to make a part of the light entering through the concave portion 20 form a total reflection effect. The total reflection surface 34 of each light splitting groove 30 is a surface having a curvature, preferably a surface having a varying curvature. By means of the total reflection surface 34 with varying curvature, the curvature at each position can be precisely controlled, so that the light at each position can achieve the total reflection effect, thereby ensuring the light to be reflected to the energy dark space between the two light emitters 40. In addition, as shown in fig. 5, the total reflection surface 34 having a curvature may be formed of a plurality of continuous facets, so that convenience in opening the mold of the body 10 may be improved, and the overall production cost may be reduced.
In addition, each light splitting groove 30 is formed with a concave arc surface 36 on a side away from the light incident surface 12. The center of the concave curved surface 36 is away from the light incident surface 12. Opposite ends of the concave arc surface 36 are connected to opposite ends of the total reflection surface 34, respectively, and the maximum width of each light splitting groove 30 may be greater than the maximum width of the corresponding concave portion 20. Therefore, when the light emitted from the light emitting bodies 40 enters the body 10 through the concave portion 20, the light does not refract inward as shown in fig. 6 to reduce the traveling angle of the light, but the light keeps the original angle or expands outward (as shown in fig. 3) compared with fig. 6, so that the light can be effectively reflected by using the light splitting groove 30 with a larger width, thereby increasing the probability that the reflected light enters the energy dark area between the two light emitting bodies 40.
The light source is disposed on one side of the light incident surface 12 of the main body 10, so as to form a backlight module. The light source includes a plurality of light emitters 40 respectively corresponding to the plurality of recesses 20 on the light incident surface 12 of the body 10. Each light 40 may be a Light Emitting Diode (LED). Referring to fig. 4, a display panel 38 is disposed on one side of the light-emitting surface 14 of the light guide plate body 10, so as to form a display.
Thus, referring to fig. 3, after the light emitted by the light-emitting bodies 40 enters the main body 10 through the light-incident surface 12 of the main body 10, a portion of the light, when reaching the total reflection surface 34 of the light-splitting groove 30, is reflected by the total reflection principle to travel toward the light-incident surface 12 of the main body 10, so that the travel angle of the light can be increased to make the portion of the light further deviate from the light-splitting point 32 to travel and enter the energy dark area between two adjacent light-emitting bodies 40. Thus, by means of the reflected light beams, the energy dark area between the two light-emitting bodies 40 can be effectively reduced, so that the light emitted by the light-emitting sources can be more uniformly distributed on the whole body 10, thereby providing a better backlight effect for the display.
In addition, each concave portion 20 has a concave arc shape when viewed in the direction of the light emitting surface 14 of the body 10. In more detail, when each concave portion 20 has a semicircular cross section such that each light emitter 40 is disposed at the center of the semicircular cross section of the corresponding concave portion 20, a portion of the light emitted from the light emitter 40 enters the body 10 through the light incident surface 12 and directly enters the body 10 without refraction. Therefore, the reduction of the advancing angle of light caused by refraction can be avoided, and the integral light guide effect of the light guide plate is further improved.
Furthermore, since the concave arc surface 36 far from the light incident surface 12 is formed on the side of each light splitting groove 30 far from the light incident surface 12, after the light not reflected by the total reflection surface 34 enters the light splitting groove 30, the concave arc surface 36 can provide an astigmatism effect similar to a concave lens for the part of light entering the light splitting groove 30, so that the light entering the body 10 of the light guide plate through the concave arc surface 36 can be further diffused outwards, and the light emitted by the light emitting body 40 can be more uniformly distributed on the body 10 of the whole light guide plate. Therefore, the light of the backlight module can be more uniform, and the overall display effect of the display is improved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents, rather than the claims.
[ List of reference numerals ]
10 main body 12 light incident surface
14 light exit surface 20 recess
30 light splitting groove 32 light splitting point
34 total reflection surface 36 concave arc surface
38 display panel 40 luminary
50 light guide plate 52 light emitter.
Claims (10)
1. A light guide plate, comprising:
the light source comprises a body, a light source and a light source, wherein the side surface of the body is defined as a light incident surface, and the top surface of the body is defined as a light emergent surface;
the concave parts are concavely arranged on the light incident surface of the body; and
the light splitting grooves are arranged on the light emitting surface of the body and respectively correspond to the concave parts, a distance is formed between each light splitting groove and the light incident surface, and a light splitting point and a total reflection surface which extends from the light splitting point to two sides far away from the light incident surface so that part of light entering through the concave parts forms a total reflection effect are formed on one side of each light splitting groove close to the light incident surface.
2. The light guide plate according to claim 1, wherein the total reflection surface of each of the light splitting grooves is a surface having a curvature.
3. The light guide plate according to claim 2, wherein the total reflection surface of each of the light splitting grooves is a surface having a varying curvature.
4. The light guide plate according to claim 1, wherein the total reflection surface of each of the light splitting grooves is formed of a plurality of continuous facets.
5. The light guide plate according to any one of claims 1 to 4, wherein each of the light splitting grooves has a concave curved surface formed on a side away from the light incident surface, a center of the concave curved surface is away from the light incident surface, and opposite ends of the concave curved surface are respectively connected to opposite ends of the total reflection surface.
6. The light guide plate according to claim 5, wherein each of the light splitting grooves has a maximum width greater than a maximum width of the corresponding concave portion.
7. The light guide plate according to claim 1, wherein the concave portion has a concave arc shape when viewed in a direction of the light exit surface of the body.
8. A backlight module, comprising:
the light guide plate according to any one of claims 1 to 7; and
the light source is arranged on one side of the light incident surface of the body and comprises a plurality of luminous bodies which respectively correspond to the plurality of concave parts on the light incident surface of the body.
9. The backlight module as claimed in claim 8, wherein each of the recesses has a semicircular cross section, and each of the light emitters is disposed at a center of the semicircular cross section of the corresponding recess.
10. A display, comprising:
a backlight module according to claim 8 or 9; and
and the display panel is arranged on one side of the light emergent surface of the light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911016205.8A CN112711088A (en) | 2019-10-24 | 2019-10-24 | Light guide plate, backlight module and display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911016205.8A CN112711088A (en) | 2019-10-24 | 2019-10-24 | Light guide plate, backlight module and display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112711088A true CN112711088A (en) | 2021-04-27 |
Family
ID=75541281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911016205.8A Pending CN112711088A (en) | 2019-10-24 | 2019-10-24 | Light guide plate, backlight module and display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112711088A (en) |
-
2019
- 2019-10-24 CN CN201911016205.8A patent/CN112711088A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8974101B2 (en) | Vehicular lamp | |
| US10371341B2 (en) | Vehicle lamp | |
| US8591083B2 (en) | Vehicular lamp | |
| US7866837B2 (en) | Skew light illumination lens device | |
| US9328885B2 (en) | Vehicle lighting unit | |
| US8752990B2 (en) | Vehicle light | |
| US9846269B2 (en) | Vehicle lighting unit | |
| US20140036522A1 (en) | Vehicular lamp | |
| US10676019B2 (en) | Vehicle dual-functional lighting module and vehicle dual-functional lighting set | |
| US6561660B2 (en) | Light guiding device of a liquid crystal display | |
| JP6709095B2 (en) | Vehicle lighting | |
| CN107101178B (en) | Light guide assembly and lighting and/or signalling device | |
| WO2008047851B1 (en) | Light-emitting apparatus | |
| US10408430B2 (en) | Asymmetric lighting lens, lighting lens array, and lighting apparatus therewith | |
| US10173584B2 (en) | Vehicle lamp | |
| US9862306B2 (en) | Vehicle decorative lighting device and vehicle lamp | |
| KR102327022B1 (en) | Lamp for vehicle | |
| CN210488031U (en) | Light guide plate, backlight module and display | |
| CN112711088A (en) | Light guide plate, backlight module and display | |
| CN108916805B (en) | Car light lens | |
| TW201546496A (en) | Optical lens and light-emitting device using the same | |
| KR101666511B1 (en) | A lamp apparatus for vehicles | |
| CN210179513U (en) | Matrix type primary optical element, car lamp module and car | |
| TWI703383B (en) | Light guide plate, backlight module and display | |
| JP2011228177A (en) | Lighting fixture for vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |