CN202382108U - Backlight module and liquid crystal display equipment applying same - Google Patents
Backlight module and liquid crystal display equipment applying same Download PDFInfo
- Publication number
- CN202382108U CN202382108U CN2011204653371U CN201120465337U CN202382108U CN 202382108 U CN202382108 U CN 202382108U CN 2011204653371 U CN2011204653371 U CN 2011204653371U CN 201120465337 U CN201120465337 U CN 201120465337U CN 202382108 U CN202382108 U CN 202382108U
- Authority
- CN
- China
- Prior art keywords
- reflector element
- light
- backboard
- light scattering
- unit
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Planar Illumination Modules (AREA)
Abstract
The utility model provides a backlight module without a light guide plate and with a uniform light intensity, and liquid crystal display equipment applying the backlight module. The backlight module comprises a back plane for supporting, a reflection unit and a light scattering unit, wherein the reflection unit and the light scattering unit are arranged above the back plane in sequence; a concave arc-shaped face which is concave towards the side of the back panel is formed on one face of the back panel, which is opposite to the reflection unit; the reflection unit is clung to the concave arc-shaped face; a cavity is formed between the reflection unit and the light scattering unit; and a light-emitting unit for leastways providing incident rays for the reflection unit is arranged on the end face of the cavity.
Description
Technical field
The utility model relates to a kind of module backlight and uses the liquid crystal display of this module backlight.
Background technology
At present, LCD (LCD) is very general display, because of it has power saving and advantage such as be easy to carry about with one, is widely used on the electric equipment products of portables such as computer, mobile phone, PDA for example.
The structure of conventional liquid crystal is generally installed module backlight at the back side of LCD panel, this module backlight by last diffusion sheet, prismatic lens, down diffusion sheet, LGP and reflecting plate in regular turn closed assembly form, and be provided with lampshade and fluorescent tube at the side of reflecting plate.The light that is sent by fluorescent tube turns to and incides down on the diffusion sheet through the effect of LGP and reflecting plate, and this incident ray passes down diffusion sheet, prismatic lens and last diffusion sheet more successively and incides on the display panels then.Wherein, LGP is a vital optics in the light conductive process, and its cost is generally than higher.
To the problems referred to above; Publication number is that the patent of CN1896837A discloses a kind of backlight module that does not have LGP and diffuser plate, on the reflecting layer, forms the astigmatic structure of protruding wavy, approximate type shape, approximate mountain word shape or approximate zigzag fashion, and this reflecting layer is arranged on the backboard; Side in the reflecting layer is provided with speculum; Luminescence unit is set on backboard, when luminescence unit is luminous, light source is exhaled and incides on the light-passing board by the astigmatic structure of reflecting layer or backboard.In technique scheme; Owing to being arranged on the backboard and over against light-passing board, said luminescence unit is provided with; The light major part of being sent by luminescence unit incides on the speculum that is arranged on reflecting layer one side, and then is mapped on the astigmatic structure of backboard via being reflected into of speculum, via astigmatic structural scattering it is dispersed etc. again; The conductive process that has increased light like this causes intensity of incident light to weaken, and is unfavorable for improving the brightness of entire display screen.Simultaneously, owing to luminescence unit is arranged on the backboard towards light-passing board, make the distribution of light on the light-passing board inhomogeneous easily.
The utility model content
In view of this, the main purpose of the utility model is, a kind of liquid crystal display that does not have LGP and even brightness module backlight and use this module backlight is provided.
For achieving the above object; The utility model provides a kind of module backlight; Comprise and be used for passive backboard and be successively set on reflector element, luminescence unit and the light scattering unit on the said backboard; It is characterized in that said reflector element is the cancave cambered surface setting that can the light of luminescence unit be reflexed to the light scattering unit on the backboard one side relative with said light scattering unit.
Draw from the above mentioned; Because said reflector element is the cancave cambered surface setting that can the light of luminescence unit be reflexed to the light scattering unit on the backboard one side relative with said light scattering unit; The light that is sent by said luminescence unit incides on the cancave cambered surface and reflects; Can change the incident direction of the light that luminescence unit sends and it is shone on the light scattering unit, thereby substitute LGP used in the prior art to reduce the cost of module backlight.
Preferably, the one side form fit that said backboard is relative with said reflector element, and be close to setting.
Draw from the above mentioned, because said reflector element is cancave cambered surface setting and the said backboard one side form fit relative with said reflector element, then being close to backboard on this cancave cambered surface, also to be concave arc planar.The light that is sent by said luminescence unit incides on the cancave cambered surface of said reflector element and on this cancave cambered surface, reflects; Can change the incident direction of the light that luminescence unit sends and it is shone on the light scattering unit, thereby substitute LGP used in the prior art to reduce the cost of module backlight.Simultaneously, because said reflector element is towards the sunk arc structure of said backboard side, the light that is sent by luminescence unit can be directly incident on the middle part of reflector element, has shortened the conducting path of light, avoids it in conductive process, to cause loss.
Preferably, between said reflector element and said light scattering unit, be formed with cavity, be disposed with a plurality of LED light emitting diodes in the end of this cavity, form described luminescence unit by these a plurality of LED light emitting diodes.
Draw from the above mentioned, owing between said reflector element and said light scattering unit, be formed with cavity, the transmitting medium of light is an air, and the penetrance of light in this cavity is high, can reduce fading rate and the energy dissipation of light in conductive process.Simultaneously, owing to adopt the LED light emitting diode, can cut down the consumption of energy and prolong its service life.
Preferably; The direction that is provided with along said luminescence unit; The middle part of said reflector element is towards protruding near said light scattering cell side; The two side portions of middle part that is close to this reflector element is dented towards the backboard side, and the two ends of said reflector element are higher than the peak of the middle part of said reflector element.
Draw from the above mentioned; Because along the direction that is provided with of said luminescence unit, the middle part of reflector element is towards protruding near said light scattering cell side, two side portions of its this middle part of next-door neighbour is dented towards the backboard side; And its two ends are higher than the peak of the middle part of said reflector element; Like this, help making middle part, thereby improve the uniformity of the light that shines display floater from the irradiate light of reflector element incident to the light scattering unit.
Preferably, along the direction that is provided with of said luminescence unit, the radius of curvature near said luminescence unit side of said reflector element is less than or equal to its radius of curvature near said reflector element middle part.
Draw from the above mentioned; Because the radius of curvature near said luminescence unit side of reflector element is less than or equal to its radius of curvature near the reflector element middle part; Help making incident ray to converge towards the middle part of said light scattering unit after reflection, avoid forming the dark space in the middle part of LCDs near the luminescence unit side.
Preferably, on the one side relative of said reflector element, be formed with the cancave cambered surface of approximate type shape or approximate mountain word shape with said light scattering unit.Help making irradiate light from reflector element incident like this to the light scattering unit, can improve the uniformity of the light that shines display floater.
Preferably, said reflector element is for can form irreflexive first reflector plate or reflectance coating to the light that is sent by said luminescence unit at least.
Draw from the above mentioned, the light that is sent by luminescence unit incides on first reflector plate or the reflectance coating, and on its surface diffuse reflection takes place, thereby increases the shadow surface of light, helps forming area source.
Preferably, said light scattering unit comprises: following diffusion sheet, be arranged on the opposite of said reflector element, and be used to make light to disperse from said reflector element incident; Prismatic lens is arranged on the said top of diffusion sheet down, is used to improve from the said brightness of the light of diffusion sheet transmission down; Last diffusion sheet is arranged on the top of said prismatic lens, is used for making the optical hazeization from said prismatic lens incident, and said prismatic lens is formed protection.
Draw from the above mentioned,, help guaranteeing the uniformity of brightness on the display screen owing to be provided with down diffusion sheet and last diffusion sheet can improve the uniformity that shines the light on the light scattering unit.Owing to be provided with prismatic lens, can strengthen from the brightness of the light of following diffusion sheet transmission.
For achieving the above object, the utility model has also proposed a kind of liquid crystal display, comprises display panels, it is characterized in that, below said display panels, be provided with aforementioned in arbitrary described module backlight.
Description of drawings
Fig. 1 is the profile of LCD;
Fig. 2 is the enlarged drawing at A place among Fig. 1.
The specific embodiment
LCD with television set is an example below, in conjunction with accompanying drawing the specific embodiment of the utility model is carried out detailed explanation.
Fig. 1 is the profile of LCD, and Fig. 2 is the enlarged drawing at A place among Fig. 1.For the convenience of describing, in following description, will be called front (or top) near a side of display panels, be called the back side (or below) away from a side of display panels.The user oriented one side of display panels is called main-vision surface, (descending) direction that goes up that should main-vision surface is called (descending) side, a left side (right side) direction that should main-vision surface is called a left side (right side) side.In addition; In the present embodiment, backboard and reflector element are close to setting, and reflector element is towards the sunk cancave cambered surface of backboard side; Then on the backboard one side relative, also form the cancave cambered surface shape that is complementary with this cancave cambered surface with reflector element; In following description,, all be employed on the backboard and form cancave cambered surface and reflector element is close to the describing mode on this backboard cancave cambered surface for the convenience of describing.
Like Fig. 1-shown in Figure 2; The back side at display panels (not shown) is provided with module backlight; This module backlight comprise backboard 1, first reflector plate 2, down diffusion sheet 5, prismatic lens 6, go up diffusion sheet 7; And heat sink strip 3 and LED lamp bar 4, by descending diffusion sheet 5, prismatic lens 6, last diffusion sheet 7 to constitute the described light scattering of the utility model unit, constitute the described reflector element of the utility model by first reflector plate 2.
As shown in Figure 1, be formed with cancave cambered surface in the front of backboard 1, this cancave cambered surface is approximate mountain word shape on the whole.Look from a left side (right side) side direction of backboard 1 orientation of LED lamp 4 (promptly along); The middle part of cancave cambered surface is towards protruding near the light scattering cell side; The two side portions that is close to this middle part is dented towards backboard 1 side, and the upper end of backboard 1 and hypomere are higher than the peak of the middle part of backboard 1.Simultaneously; The radius of curvature of the both sides of cancave cambered surface is less than the radius of curvature of intermediate portion; Promptly look from a left side (right side) side direction of backboard 1, on the one side that backboard 1 and first reflector plate 2 fit, the arc surface that forms at its place, two ends is than steep near the arc surface at column 12 places.First reflector plate 2 matches with backboard 1 and merges the front that is close to backboard 1, and then first reflector plate 2 also is aforesaid cancave cambered surface structure on the whole.The light that LED lamp 4 sends incides on the cancave cambered surface of first reflector plate 2 and on this cancave cambered surface, diffuse reflection takes place; Can change the incident direction of the light that LED lamp 4 sends and it is shone on the light scattering unit, thereby substitute LGP used in the prior art to reduce the cost of module backlight.Simultaneously; Since cancave cambered surface near the radius of curvature of LED lamp 4 sides less than its radius of curvature near column 12 sides; Help making incident ray after the reflection of first reflector plate 2, to converge, thereby avoid forming the dark space in the middle part of following diffusion sheet 5 towards the middle part of cavity 10.In addition; Backboard 1 general the employing has certain thickness and the passive plastic plate of ability; Compare with backboard 1, first reflector plate 2 is generally thinner, thereby makes first reflector plate 2 be the cancave cambered surface shape on the whole on this cancave cambered surface through then first reflector plate 2 being close at formation cancave cambered surface on the backboard 1; Can simplify the manufacturing process of module backlight, also help simultaneously and reduce cost.
As shown in Figure 2, corresponding with LED lamp 4, be provided with auxiliary reflector plate 8 in the both sides up and down of backboard 1.Auxiliary reflector plate 8 is made up of two parts, comprises second reflector plate 82 and the 3rd reflector plate 81, and wherein, second reflector plate 82 is close to the both sides up and down in the front that is arranged on backboard 1, and is connected with the edge of the both sides up and down of first reflector plate 2; The 3rd reflector plate 81 is close to and is arranged on heat sink strip 3 and following diffusion sheet 5 back side of access section mutually, and relative with second reflector plate 82.Because LED lamp 4 is a spot light; The light that it sent will be dispersed to all directions; Through the 3rd emission sheet 81 can with LED lamp 4 sent towards the light orienting reflex of light scattering cell side to second reflector plate 82; Via this second reflector plate 82 with the centre of this part light orienting reflex to cavity 10, thereby improve the brightness in the centre of module backlight, avoid forming the dark space at this place.Look from a left side (right side) side direction of backboard 1; Second reflector plate 82 is close to the upside and the downside of the cancave cambered surface of backboard 1; And its cambered surface length is greater than the length of the 3rd reflector plate 81; Help making the incident ray of the LED lamp 4 that reflects via the 3rd reflector plate 81 to shine on second reflector plate 82 like this, thereby be added to the light that is mapped to module backlight middle part, to prevent forming the dark space in the middle part of module backlight.
Structure in conjunction with above-mentioned module backlight is described, and its light conductive process is analyzed, and is specially:
The light that is sent by LED lamp 4 incides on first reflector plate 2 and on this first reflector plate 2 diffuse reflection takes place.Because the front of first reflector plate 2 has frosting, diffuse scattering takes place in this incident ray on first reflector plate 2, can change the incident direction of incident ray, and this part incident ray is dispersed and increased its light-emitting area.Because protrusion in the middle of first reflector plate 2 is on the whole, the sunk cancave cambered surface shape in both sides helps making incident ray to shine the position, intermediate portion and diffuse reflection takes place, thereby improves the uniformity of the light that shines down diffusion sheet 5.
Light by 2 reflections of first reflector plate conducts in cavity 10.Because cavity 10 is a hermetically-sealed construction, the transmitting medium of light is an air in this cavity 10, and then the penetrance of light in this cavity 10 is high, can reduce fading rate and the energy dissipation of light in conductive process.
Light by 2 reflections of first reflector plate incides down on the diffusion sheet 5; 5 pairs of these reflection rays of this time diffusion sheet carry out light to be disperseed; Wherein, most of light conducts to down the front of diffusion sheet 5 through this time diffusion sheet 5, and some light is made the return trip empty by the backside reflection of following diffusion sheet 5 in the chamber 10.Conduct to down diffusion sheet 5 positive light and incide on the prismatic lens 6, and improve its brightness via the effect of this prismatic lens 6.Incided on first reflector plate 2 and continue the conductive process before the repetition by the light in the following diffusion sheet 5 reflected back cavitys 10.The light that is penetrated by prismatic lens 6 incides on the diffusion sheet 7, via diffusion sheet on this 7 it is further spread, to improve its uniformity.The light that is appeared by last diffusion sheet 7 incides on the display panels, thereby illuminates this display panels.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
For example, as shown in Figure 1 in the above-described embodiments, the light scattering unit by following diffusion sheet 5, be arranged on the prismatic lens 6 of this time diffusion sheet 5 tops and the last diffusion sheet 7 that is arranged on above this prismatic lens is formed; Yet not limited thereto, also can increase other diffusion sheet structures.
Again for example; In the above-described embodiments, as shown in Figure 1, the upside of LED lamp 4 corresponding backboards 1 and downside and be provided with; Look from the left side or the right side of backboard 1; The middle part of backboard 1 is towards protruding near the light scattering cell side, and two side portions of its this middle part of next-door neighbour is dented towards the backboard side, and its two ends are higher than the peak of the middle part of backboard 1.Yet it is not limited thereto; The LED lamp also can be arranged on the left side and the right side of backboard; Correspondingly, look from the upside or the downside of backboard, the middle part of backboard is towards protruding near the light scattering cell side; The two side portions of its this middle part of next-door neighbour is dented towards the backboard side, and its two ends are higher than the peak of the middle part of backboard.
Claims (9)
1. module backlight; Comprise and be used for passive backboard (1) and be successively set on reflector element, luminescence unit and the light scattering unit on the said backboard; It is characterized in that said reflector element is the cancave cambered surface setting that can the light of luminescence unit be reflexed to the light scattering unit on backboard (1) one side relative with said light scattering unit.
2. module backlight according to claim 1 is characterized in that, the one side form fit that said backboard (1) is relative with said reflector element, and be close to setting.
3. module backlight according to claim 2; It is characterized in that; Between said reflector element and said light scattering unit, be formed with cavity (10); Be disposed with a plurality of LED light emitting diodes (4) in the end of this cavity (10), form described luminescence unit by these a plurality of LED light emitting diodes (4).
4. module backlight according to claim 3; It is characterized in that; The direction that is provided with along said luminescence unit; The middle part of said reflector element is towards near said light scattering cell side protrusion, and the two side portions of middle part that is close to this reflector element is dented towards the backboard side, and the two ends of said reflector element are higher than the peak of the middle part of said reflector element.
5. according to claim 3 or 4 described modules backlight, it is characterized in that along the direction that is provided with of said luminescence unit, the radius of curvature near said luminescence unit side of said reflector element is less than or equal to its radius of curvature near said reflector element middle part.
6. module backlight according to claim 1 and 2 is characterized in that, on the one side relative with said light scattering unit of said reflector element, is formed with the cancave cambered surface of approximate type shape or approximate mountain word shape.
7. module backlight according to claim 1 and 2 is characterized in that said reflector element is for can form irreflexive first reflector plate (2) or reflectance coating to the light that is sent by said luminescence unit at least.
8. module backlight according to claim 1 is characterized in that, said light scattering unit comprises:
Following diffusion sheet (5) is arranged on the opposite of said reflector element, is used to make the light from said reflector element incident to disperse;
Prismatic lens (6) is arranged on the said top of diffusion sheet (5) down, is used for improving from the said brightness of the light of diffusion sheet (5) transmission down;
Last diffusion sheet (7) is arranged on the top of said prismatic lens (6), is used for making the optical hazeization from said prismatic lens (6) incident, and said prismatic lens (6) is formed protection.
9. a liquid crystal display comprises display panels, it is characterized in that, below said display panels, is provided with arbitrary described module backlight among the claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204653371U CN202382108U (en) | 2011-11-21 | 2011-11-21 | Backlight module and liquid crystal display equipment applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204653371U CN202382108U (en) | 2011-11-21 | 2011-11-21 | Backlight module and liquid crystal display equipment applying same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202382108U true CN202382108U (en) | 2012-08-15 |
Family
ID=46630608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204653371U Expired - Fee Related CN202382108U (en) | 2011-11-21 | 2011-11-21 | Backlight module and liquid crystal display equipment applying same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202382108U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017028A (en) * | 2012-12-03 | 2013-04-03 | 彩虹集团公司 | Light guide plate-free light-emitting diode (LED) backlight module |
| CN103017033A (en) * | 2012-12-07 | 2013-04-03 | 康佳集团股份有限公司 | Bilateral optical backlight module |
| CN103123072A (en) * | 2011-11-21 | 2013-05-29 | 青岛海尔电子有限公司 | Backlight module and liquid crystal display device utilizing backlight module |
-
2011
- 2011-11-21 CN CN2011204653371U patent/CN202382108U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123072A (en) * | 2011-11-21 | 2013-05-29 | 青岛海尔电子有限公司 | Backlight module and liquid crystal display device utilizing backlight module |
| CN103123072B (en) * | 2011-11-21 | 2016-03-09 | 青岛海尔电子有限公司 | Backlight module and apply its liquid crystal display |
| CN103017028A (en) * | 2012-12-03 | 2013-04-03 | 彩虹集团公司 | Light guide plate-free light-emitting diode (LED) backlight module |
| CN103017033A (en) * | 2012-12-07 | 2013-04-03 | 康佳集团股份有限公司 | Bilateral optical backlight module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102980105B (en) | A kind of backlight module and display unit | |
| US8384848B2 (en) | Edge-lighting LED backlight and LCD thereof | |
| US20110222294A1 (en) | Side emitting LED module | |
| CN102865516B (en) | Backlight module and light-emitting diode display | |
| CN202647443U (en) | LED (light emitting diode) backlight module and LED liquid crystal display device | |
| WO2011066692A1 (en) | Uniform high-luminance side-light type backlight source | |
| CN202382107U (en) | Backlight module and liquid crystal display equipment using same | |
| CN103939791A (en) | Lighting device and image display device using the same | |
| CN202647428U (en) | Laterally-entering type backlight module and display unit | |
| CN102518984A (en) | Backlight module and liquid crystal display device | |
| TWM466278U (en) | Thinning LED direct-type backlight module | |
| CN102893075A (en) | Backlight device and liquid crystal display device | |
| US8876316B2 (en) | Backlight module | |
| CN202382108U (en) | Backlight module and liquid crystal display equipment applying same | |
| CN103123072B (en) | Backlight module and apply its liquid crystal display | |
| CN103453390B (en) | A kind of LCD TV, backlight module and preparation method thereof | |
| CN103175033B (en) | Side light source LED-backlit module | |
| US9405149B2 (en) | Direct backlight module | |
| CN100422814C (en) | Backlight module | |
| CN103527966A (en) | Light-emitting diode (LED) lamp strip, side light type backlight source module and display device | |
| CN102494284A (en) | Lateral illumination type backlight module capable of improving LED (light emitting diode) luminous efficiency | |
| CN201462582U (en) | Sidelight type backlight module of CCFL | |
| CN202065832U (en) | Sidelight type backlight module and liquid crystal display (LCD) | |
| CN102691944A (en) | Light emitting diode (LED) edge-lighting backlight module | |
| CN103123073B (en) | Backlight module and apply its liquid crystal display |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151116 Address after: 266101 Haier Information Park, 1 Haier Road, hi tech park, Laoshan District, Qingdao, Shandong Patentee after: Qingdao Haier Electric Appliance Co., Ltd. Patentee after: haier group corporation Patentee after: Qingdao Haier Photoelectric Co., Ltd. Patentee after: QINGDAO HAIER MULTI-MEDIA CO., LTD. Address before: 266101 Haier Information Park, 1 Haier Road, hi tech park, Laoshan District, Qingdao, Shandong Patentee before: Qingdao Haier Electric Appliance Co., Ltd. Patentee before: haier group corporation Patentee before: Qingdao Haier Photoelectric Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20161121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |