CN101051149A - Side light type back light module - Google Patents
Side light type back light module Download PDFInfo
- Publication number
- CN101051149A CN101051149A CN 200610074180 CN200610074180A CN101051149A CN 101051149 A CN101051149 A CN 101051149A CN 200610074180 CN200610074180 CN 200610074180 CN 200610074180 A CN200610074180 A CN 200610074180A CN 101051149 A CN101051149 A CN 101051149A
- Authority
- CN
- China
- Prior art keywords
- light
- guide plate
- prism structure
- angle
- light guide
- 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
Abstract
A back light plate of side light type is prepared for setting light guide plate as side surface of light source, arranging the first prism with the first and the second light outgoing surfaces (OS) for guiding out light emitted into light guide plate by light source on said light guide plates, forming the first included angle by two said light OS, using the second prism with the third and the fourth light OS to guide out light emitted into light guide plate by light source, forming the second included angle by the third and the fourth light OS and making the first includes angle be different from the second one.
Description
[technical field]
The invention relates to a kind of backlight module, particularly about a kind of side light type back light module.
[background technology]
Because liquid crystal itself can't be luminous, therefore backlight module is to be LCD (liquidcrystal display, LCD) key part and component of panel, its major function just fully reach the light source that is evenly distributed in supply brightness, so that the normal show image of LCD panel.And along with the LCD panel has been widely used in the electronic product of numerous tool growth potentiality, as monitor (monitor), notebook, digital camera, projector or the like, the also sustainable growth of the demand of backlight module and relevant spare part thereof.
Generally speaking, backlight module can be according to the position of light source, is divided into light source and produces from (direct-type) backlight module of the straight-down negative under the display panel and light source near two kinds of designs of the side-light type the display panel side (edge-type) backlight module.And, therefore can dwindle the volume and the manufacturing cost of LCD wherein because side light type back light module is a side of light source generator being located at display panel, and be applied to small-sized electric equipment products.
See also Fig. 1, known side light type back light module 10 is belows of being located at a display panel 12, side light type back light module 10 consists predominantly of a light guide plate (light guide plate, LGP) 14 be located at display panel 12 belows, several light emitting diodes (Light Emitting Diode, LED) 16 be located at one of light guide plate 14 side, one lampshade 18 is located at side outside several light emitting diodes 16, one reflecting plate (reflectingsheet) 20 is located at light guide plate 14 belows, be used for to pass the light reflected back light guide plate 14 of light guide plate 14 downwards, and an optical material layer 22 is located between light guide plate 14 and the display panel 12.Wherein, light emitting diode 16 is to be used to provide a light source to display panel 12, and lampshade 18 and reflecting plate 20 are to be used for the light that light emitting diode 16 is produced is reflexed to light guide plate 14 increasing the utilization rate of light, with so that a preferable brightness output is provided.The miniature scattering point (not being shown among the figure) of light guide plate 14 belows can destroy light in the total reflection of light guide plate 14 and light refraction is gone out light guide plate 14 enter optical material layer 22, optical material layer 22 can further atomize the light that is reflected by light guide plate 14 and optically focused, to provide display panel 12 even the and high light source of facing angular brightness.
From the above, light guide plate 14 is one of vital part of side light type back light module 10, the effect of light guide plate 14 is the scattering direction of direct light, be used for improving the briliancy of display panel 12, and guarantee the homogeneity of display panel 12 brightness, therefore the design of light guide plate 14 and the control of making concern backlight module optical design and briliancy, equal fineness are topmost technology of backlight module manufacturer and cost place.See also Fig. 2 and Fig. 3, the general backlight module that uses light emitting diode as light source, generally use the design of prism facets (V-Groove prism) light guide plate, an exiting surface 24 that is to say light guide plate 14 can be made up of the wire prism structure 26 that is set up in parallel, wherein the prism angle of each prism structure 26 is all identically, and it is fixing that meaning is that the angle of each rill is all, as shown in Figure 3, angle A i=Bi=Aj=Bj, angle Ci=Di=Cj=Dj.And after light entered light guide plate 14, a bottom surface 28 that can see through light guide plate 14 produced diffusions, saw through prism structure 26 again and produced refraction or reflection, so that light angle focuses on front (being angular field of view), faced angular brightness and improve.
Because the effect of the prism structure 26 of light guide plate 14, after light is injected light guide plate 14 inside by light emitting diode 16, advance in light guide plate 14 inside and to have following effect, the one, toward vertically (directions X) diffusion, penetrate by exiting surface 24 and in diffusion, have more and more light, so that light guide plate 14 is luminous; Another effect is that light spreads to the both sides of light guide plate (Y direction), and in the time of diffusion, also have more and more light by exiting surface 24 ejaculations, but just can make dark more away from the position of light source more thus, that is to say in the light emitting diode 16 that uses pointolite and during as the light source of side light type back light module 10, on display panel 12, have light and concentrate and form the phenomenon of concentrating light belt near light emitting diode 16 parts.In general can solve the problems referred to above by following several method, be first take sandblast or etching and processing with the pattern that forms cloudy surface or point-like face structure in the another side with respect to prism facets of light guide plate 14, distribute to compensate with density and revise the light uniformity coefficient by the pattern of adjusting light guide plate 14, yet the effect of this kind method is limited, in general still can see concentrated light belt; Second be the longitudinal length of lengthening light guide plate 14, concentrate the most serious light point area to hide near light emitting diode 16 local light, but just can increase the area of side light type back light module 10 thus.So how to find one effectively to solve above-mentioned light and concentrate and form the phenomenon of concentrating light belt, be the problem that side light type back light module is now made required effort.
[summary of the invention]
The objective of the invention is to be to provide a kind of has near the prism angle of the prism structure of light source less than away from the side light type back light module of the light guide plate of the prism angle of the prism structure of light source, the light that has just been sent by light source can be transmitted toward the light guide plate both sides effectively, do not concentrate and form the phenomenon generation of concentrating light belt and do not have light, thereby guarantee the homogeneity of the luminosity and the picture brightness of side light type back light module integral body.
In order to achieve the above object, the invention provides a kind of side light type back light module, include a light source, and a light guide plate, being installed on the side of this light source, this light guide plate includes one first prism structure, be used for deriving the light that this light source is injected this light guide plate, this first prism structure has one first exiting surface, and one second exiting surface, is formed with one first angle between this second exiting surface and this first exiting surface; And one second prism structure, being used for deriving the light that this light source is injected this light guide plate, this second prism structure has one the 3rd exiting surface, and one the 4th exiting surface, is formed with one second angle between the 4th exiting surface and the 3rd exiting surface; Wherein this first angle is to be different from this second angle.
Described side light type back light module is characterized in that: this first prism structure and this second prism structure are respectively the wire prism structure.
Described side light type back light module is characterized in that: be formed with a V-groove (V-groove) between this first prism structure and this second prism structure.
Described side light type back light module is characterized in that: this first prism structure is than close this pointolite of this second prism structure, and this first angle is less than this second angle.
Described side light type back light module is characterized in that: this pointolite be a light emitting diode (LightEmitting Diode, LED).
Described side light type back light module is characterized in that: this light guide plate is an acrylic plate.
Described side light type back light module is characterized in that: also comprise an optical material layer in addition, be arranged at the top of this light guide plate, be used for the light that first prism structure and second prism structure by this light guide plate are reflected is further atomized and optically focused.
The characteristics of light guide plate of the present invention are to adopt the design concept that different prism angles are arranged apart from the light source diverse location, meaning promptly adopts near the prism angle of the prism structure of light source less than away from the structural arrangements of the prism angle of the prism structure of light source, the light that has just been sent by light source can be transmitted toward the light guide plate both sides effectively, and light is concentrated and formation concentrates the phenomenon of light belt to take place and do not have.
[description of drawings]
Fig. 1 is the synoptic diagram of known side light type back light module.
Fig. 2 is the schematic appearance of known light guide plate.
Fig. 3 is the structure side view of known light guide plate.
Fig. 4 is the synoptic diagram of side light type back light module of the present invention.
Fig. 5 is the schematic appearance of light guide plate of the present invention.
Fig. 6 is the structure side view of light guide plate of the present invention.
Fig. 7 is in the synoptic diagram of different prism angle time course.
Fig. 8 is the synoptic diagram of light of the present invention in light guide plate side (Y direction) diffusion.
[embodiment]
See also Fig. 4, side light type back light module 50 of the present invention is belows of being located at a display panel 52, side light type back light module 50 includes a light guide plate 54 and is located at display panel 52 belows, it can be an acrylic plate, several pointolites are located at a side of light guide plate 54, it can be light emitting diode 56, one lampshade 58 is located at the outside of several light emitting diodes 56, one reflecting plate 60 is located at light guide plate 54 belows, be used for to pass the light reflected back light guide plate 54 of light guide plate 54 downwards, and an optical material layer 62 is located between light guide plate 54 and the display panel 52.Wherein, light emitting diode 56 is to be used to provide a light source to display panel 52, and lampshade 58 and reflecting plate 60 are to be used for the light that light emitting diode 56 is produced is reflexed to light guide plate 54 increasing the utilization rate of light, with so that a preferable brightness output is provided.The miniature scattering point (not being shown among the figure) of light guide plate 54 belows can destroy light in the total reflection of light guide plate 54 and light refraction is gone out light guide plate 54 enter optical material layer 62, optical material layer 62 can further atomize the light that is reflected by light guide plate 54 and optically focused, to provide display panel 52 even the and high light source of facing angular brightness.
See also Fig. 5 and Fig. 6.The exiting surface of light guide plate 54 can be made up of the wire prism structure that is set up in parallel, light is after entering light guide plate 54, the bottom surface that can see through light guide plate 54 produces diffusion, see through prism structure again and produce refraction or reflection, so that light angle focuses on front (being angular field of view), face angular brightness and improve.And that the prism angle of each prism structure of light guide plate 54 is not all is all identical, as shown in Figure 6, the exiting surface of light guide plate 54 comprises the one first prism structure 64a and the second prism structure 64b, be used for deriving the light that light emitting diode 56 is injected light guide plate 54, the first prism structure 64a has one first exiting surface 66a and one second exiting surface 66b, and the second prism structure 64b has one the 3rd exiting surface 66c and one the 4th exiting surface 66d.Wherein be formed with a V-groove (V-groove) 68 between the first prism structure 64a and the second prism structure 64b, and angle A j=Bj＜Ai=Bi of the first prism structure 64a and the second prism structure 64b, angle Cj=Di＜Ci=Dj, and angle A j and angle Di alternate interior angle, angle B j and angle Cj alternate interior angle, angle B i and angle Ci alternate interior angle each other each other each other.Prism angle (the angle of the first exiting surface 66a and the second exiting surface 66b of the first prism structure 64a of light guide plate 54 close light emitting diodes 56, be the angle that Aj adds Bj) less than away from the prism angle (angle of the 3rd exiting surface 66c and the 4th exiting surface 66d of the second prism structure 64b of light emitting diode 56, be the angle that Ai adds Bi), this is to help light toward next door (Y direction) diffusion more because of the more little prism angle of angle.See also Fig. 7, Fig. 7 is in the synoptic diagram of different prism angle time course, as can be seen from Figure when prism angle more hour then light by big more toward the angle of both sides deviation, when prism angle is big more then light by more little toward the angle of both sides deviation.
See also Fig. 8, because the prism angle of the prism structure of close light emitting diode 56 is less, so light is comparatively obvious toward the effect of side (Y direction) diffusion, and more the prism angle away from the prism structure of light emitting diode 56 is bigger, so light is comparatively not obvious toward the effect of side (Y direction) diffusion, therefore seeing through this structural design can make the light that has just been sent by light emitting diode 56 transmit toward both sides (Y direction) effectively, do not concentrate and form the phenomenon generation of concentrating light belt and do not have light, and can be designed to greatlyyer in prism angle near the prism structure of both sides, continue toward the both sides diffusion to avoid light.
Compared to known side light type back light module, side light type back light module of the present invention is to adopt the design concept that changes different prism angles apart from the light source diverse location, meaning promptly near the prism angle of the prism structure of light source less than away from the structural arrangements of the prism angle of the prism structure of light source, the light that has just been sent by light source can be transmitted toward the light guide plate both sides effectively, do not concentrate and form the phenomenon generation of concentrating light belt and do not have light, and can be designed in prism angle near the prism structure of both sides bigger, so can avoid light to continue to spread toward both sides.Therefore design of the present invention can take into account the homogeneity of the luminosity and the picture brightness of side light type back light module integral body.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to the covering scope of patent of the present invention.
[primary clustering symbol description]
10 side light type back light modules, 12 display floaters
14 LGPs, 16 light emitting diodes
18 lampshades, 20 reflecting plates
22 optical material layers, 24 exiting surfaces
26 prism structures, 28 bottom surfaces
50 side light type back light modules, 52 display floaters
54 LGPs, 56 spot lights
58 lampshades, 60 reflecting plates
62 optical material layer 64a, first prism structure
The 64b second prism structure 66a first exiting surface
The 66b second exiting surface 66c the 3rd exiting surface
66d the 4th exiting surface 68 V-grooves
Claims (7)
1. side light type back light module is characterized in that: include:
One pointolite; And
One light guide plate has a side, and this pointolite is installed on this side, and this light guide plate includes:
One first prism structure is used for deriving the light that this pointolite is injected this light guide plate, and this first prism structure has one first exiting surface and one second exiting surface, is formed with one first angle between this second exiting surface and this first exiting surface; And
One second prism structure, be used for deriving the light that this pointolite is injected this light guide plate, this second prism structure has one the 3rd exiting surface and one the 4th exiting surface, be formed with one second angle between the 4th exiting surface and the 3rd exiting surface, and this first angle is different from this second angle.
2. side light type back light module as claimed in claim 1 is characterized in that: this first prism structure and this second prism structure are respectively the wire prism structure.
3. side light type back light module as claimed in claim 2 is characterized in that: be formed with a V-groove between this first prism structure and this second prism structure.
4. side light type back light module as claimed in claim 1 is characterized in that: this first prism structure is than close this pointolite of this second prism structure, and this first angle is less than this second angle.
5. side light type back light module as claimed in claim 1 is characterized in that: this pointolite is a light emitting diode.
6. side light type back light module as claimed in claim 1 is characterized in that: this light guide plate is an acrylic plate.
7. side light type back light module as claimed in claim 1, it is characterized in that: also comprise an optical material layer in addition, be arranged at the top of this light guide plate, be used for the light that first prism structure and second prism structure by this light guide plate are reflected is further atomized and optically focused.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610074180 CN101051149A (en) | 2006-04-07 | 2006-04-07 | Side light type back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610074180 CN101051149A (en) | 2006-04-07 | 2006-04-07 | Side light type back light module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101051149A true CN101051149A (en) | 2007-10-10 |
Family
ID=38782630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610074180 Pending CN101051149A (en) | 2006-04-07 | 2006-04-07 | Side light type back light module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101051149A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8147111B2 (en) | 2008-11-25 | 2012-04-03 | Au Optronics Corporation | Light guide plate and backlight module |
| CN103185244A (en) * | 2011-12-29 | 2013-07-03 | 扬升照明股份有限公司 | Light source module |
| CN105116477A (en) * | 2015-09-28 | 2015-12-02 | 京东方科技集团股份有限公司 | Optical element, light guide plate, prism, backlight module and display device |
| CN106547047A (en) * | 2017-01-24 | 2017-03-29 | 合肥京东方光电科技有限公司 | A kind of light guide plate, backlight module and display device |
-
2006
- 2006-04-07 CN CN 200610074180 patent/CN101051149A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8147111B2 (en) | 2008-11-25 | 2012-04-03 | Au Optronics Corporation | Light guide plate and backlight module |
| CN103185244A (en) * | 2011-12-29 | 2013-07-03 | 扬升照明股份有限公司 | Light source module |
| CN105116477A (en) * | 2015-09-28 | 2015-12-02 | 京东方科技集团股份有限公司 | Optical element, light guide plate, prism, backlight module and display device |
| WO2017054382A1 (en) * | 2015-09-28 | 2017-04-06 | 京东方科技集团股份有限公司 | Optical element, light guide plate, prism, backlight unit and display apparatus |
| US10132966B2 (en) | 2015-09-28 | 2018-11-20 | Boe Technology Group Co., Ltd. | Optical element including strip-shaped prisms, light guide plate, prism, backlight module and display device |
| CN106547047A (en) * | 2017-01-24 | 2017-03-29 | 合肥京东方光电科技有限公司 | A kind of light guide plate, backlight module and display device |
| US10551545B2 (en) | 2017-01-24 | 2020-02-04 | Boe Technology Group Co., Ltd. | Light guide plate, backlight module and display apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101329413B1 (en) | Optical lens, optical module having the optical lens and backlight unit having the optical module | |
| CN101042449A (en) | Light conducting plate and back light module unit | |
| CN1773345A (en) | Light conducting plate and back light module | |
| CN1655032A (en) | Backlight system | |
| CN101057168A (en) | Optical film having a structured surface with rectangular based prisms | |
| CN1779518A (en) | Light-conducting board and backlight mould set | |
| CN1881023A (en) | Backlight module assembly | |
| CN1862335A (en) | Backlight module | |
| CN1916723A (en) | Plate of guiding light, and backlight module | |
| CN1877416A (en) | Back light module | |
| CN1947040A (en) | Prism sheets having both reflective and transmissive properties, methods of their manufacture, and their incorporation in display modules | |
| CN101418930B (en) | Area source device for LED | |
| CN101922660A (en) | Backlight module and display device | |
| CN1503038A (en) | Illumination device and LCD device | |
| CN101660719A (en) | Backlight module | |
| CN1570720A (en) | Backlight source device and liquid crystal display | |
| CN101149523A (en) | Backlight module and lamp possessing direct type light guiding board | |
| CN1619373A (en) | Light conducting board and back light module | |
| CN101051149A (en) | Side light type back light module | |
| CN116931160A (en) | Backlight module with multiple cone structures designed on optical film and display device | |
| CN101587263B (en) | Light guide plate and backlight module | |
| CN1797106A (en) | Plate for guiding light and backlight module | |
| CN103900033A (en) | Light guide plate and backlight module | |
| CN1266411C (en) | Light board device | |
| CN1220102C (en) | A double-faced light guiding plate and LCD having the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |