CN102434823B - A kind of liquid crystal display and curved face reflecting type LED backlight module thereof - Google Patents
A kind of liquid crystal display and curved face reflecting type LED backlight module thereof Download PDFInfo
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- CN102434823B CN102434823B CN201110314605.4A CN201110314605A CN102434823B CN 102434823 B CN102434823 B CN 102434823B CN 201110314605 A CN201110314605 A CN 201110314605A CN 102434823 B CN102434823 B CN 102434823B
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- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000035742 Air-borne transmission Diseases 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- 239000011521 glass Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
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Abstract
The invention discloses a kind of liquid crystal display and curved face reflecting type LED backlight module thereof, comprise the backboard chamber being made up of air transmitted light backboard and diffuse optical parts; Backboard is provided with LED lamp bar; Curved face type reflector plate is also provided with, for the light reflection that LED lamp bar sent to diffuse optical parts in backboard chamber; Reflector plate transversal section is smooth arc line shaped, and concave surface facing diffuse optical parts.Owing to have employed the curved face type reflector plate of concave surface facing diffuse optical parts, directly by the part light reflection of LED lamp source on diffuse optical parts, diffuse optical parts are reflected back again with by the light reflected from diffuse optical parts surface, alleviate the phenomenons such as bar blocks shape brightness disproportionation or lamp shadow, save light guide plate, decrease the consumption of LED lamp source and pcb board thereof, also reduce the consumption even saving LED lamp source optical lens, greatly reduce cost; Structure is simple simultaneously, easy to process, is easy to batch production.
Description
Technical field
The present invention relates to the LED-backlit module field without light guide plate in liquid crystal display, in particular, what improvement related to is a kind of liquid crystal display and curved face reflecting type LED backlight module thereof.
Background technology
Nowadays, TFT-LCD (Thin Film Transistor-LCD) as the clear beautiful display saving again the energy of a kind of ultrathin picture, is widely used in mobile phone, computer monitor, TV etc.; But TFT-LCD itself is not luminous, needing backlight could show image.
Various display products universal in the market widely use CCFL (Cold Cathode Fluorescent Lamp, cathode fluorescent tube) or LED (light emitting diode) backlight, and light inlet mode all adopts straight-down negative or side entering type.Along with the development of LED technology and market have been tending towards obvious to the demand of environmental protection and energy saving, the backlight module of LED light source has become the main flow of this 2 years prior aries.The backlight module of LED light source has the advantage such as energy-saving and environmental protection, low-power consumption, and for TV, in existing market, the ratio of LED-backlit module LCD TV is in rapid expansion.
Due to the light guide plate starting material PMMA (polymethylmethacrylate of side entering type type, i.e. organic glass, also claims acrylic or polymethyl methacrylate) in short supply, its price proportion in backlight module is larger, and have the trend of rise in price, cause some manufacturer to turn to straight-down negative type; The LED lamp source of straight-down negative type then needs a large amount of circuit boards, then needs to increase optical lens, the cost of straight-down negative type is also remained high to reduce LED lamp source quantity; In addition, be in the transitional period of CCFL light source to LED light source at present, the structural member mould producing CCFL machine in enormous quantities will leave unused or discard, and how designing LED-backlit module can reduce costs, especially can take into account original CCFL machine structural member, become the focus of each manufacturer.Therefore, prior art still haves much room for improvement and develops.
Summary of the invention
The object of the invention is to, a kind of liquid crystal display and curved face reflecting type LED backlight module thereof are provided, can reduce costs, and original CCFL machine structural member can be taken into account.
Technical scheme of the present invention is as follows: a kind of curved face reflecting type LED backlight module, comprises the backboard chamber being made up of air transmitted LED lamp source light backboard and diffuse optical parts; Backboard is provided with the lamp bar of welding LED lamp source; Wherein: the reflector plate being also provided with curved face type in described backboard chamber, for light reflection that LED lamp source on lamp bar is sent to diffuse optical parts; The transversal section of described reflector plate is smooth arc line shaped, and the concave surface facing diffuse optical parts of reflector plate, the curved below being positioned over described lamp bar of described reflector plate; Described lamp bar comprises the first lamp bar and the second lamp bar; Described first lamp bar is arranged on the bottom surface in backboard chamber; Described second lamp bar is arranged on the side in backboard chamber, and the spacing on described first lamp bar between adjacent two LED lamp source is greater than the spacing on described second lamp bar between adjacent two LED lamp source.
Described curved face reflecting type LED backlight module, wherein: the installed surface of described second lamp bar is arranged with the installed surface of the first lamp bar is mutually vertical.
Described curved face reflecting type LED backlight module, wherein: the installed surface of described second lamp bar is arranged towards the inclined bottom surface in backboard chamber.
Described curved face reflecting type LED backlight module, wherein: the installed surface of described second lamp bar is obliquely installed towards diffuse optical parts.
A kind of liquid crystal display, comprises the LED-backlit module at liquid crystal board and the back side thereof; Described liquid crystal board and LED-backlit module are all arranged in the enclosure; Wherein: described LED-backlit module is set to the curved face reflecting type LED backlight module described in above-mentioned any one.
A kind of liquid crystal display provided by the present invention and curved face reflecting type LED backlight module thereof, owing to have employed the curved face type reflector plate of concave surface facing diffuse optical parts, directly by the part light reflection of LED lamp source on diffuse optical parts, and the light reflected from diffuse optical parts surface is reflected again, until turn back on diffuse optical parts, alleviate bar blocks shape brightness disproportionation or the phenomenon such as lamp shadow that existing LED-backlit module produces, save light guide plate, decrease the consumption of LED lamp source and pcb board thereof, also the consumption even saving LED lamp source optical lens is reduced, greatly reduce the material cost of LED-backlit module, structure is simple simultaneously, easy to process, is easy to batch production, and is applicable to the structural member using original CCFL machine.
Accompanying drawing explanation
Fig. 1 is the side sectional view of curved face reflecting type LED backlight module embodiment 1 of the present invention.
Fig. 2 is the side sectional view of curved face reflecting type LED backlight module embodiment 2 of the present invention.
Fig. 3 is the side sectional view of curved face reflecting type LED backlight module embodiment 3 of the present invention.
Fig. 4 is the fragmentary front view of curved face reflecting type LED backlight module embodiment 1 of the present invention.
Embodiment
Below with reference to accompanying drawing, described in detail the specific embodiment of the present invention and embodiment, described specific embodiment only in order to explain the present invention, is not intended to limit the specific embodiment of the present invention.
A kind of curved face reflecting type LED backlight module of the present invention, as shown in Figure 1, the lamp bar 310 (320 or 330) comprising chamber shape backboard 100, plate diffuse optical parts 200 and be made up of the pcb board being welded with plurality of LEDs lamp source; The top side face 120 of described backboard 100 and bottom side 130 are perpendicular with the bottom surface 110 of this backboard 100 respectively; Described backboard 100 forms the backboard chamber with closed interior space structure with diffuse optical parts 200, for the light sent by the upper LED lamp source of air transmitted lamp bar 310 (320 or 330); Wherein, the reflector plate 400 of curved face type is also provided with in described backboard chamber, the transversal section of described reflector plate 400 is smooth arc line shaped, the concave surface facing diffuse optical parts 200 of described reflector plate 400, for the light reflection that upper for described lamp bar 310 (320 or 330) LED lamp source sent to diffuse optical parts 200; The curved below being positioned over described lamp bar 310 (320 and 330) of described reflector plate 400, to make the illumination effect on diffuse optical parts 200 as far as possible even.
In the preferred implementation of curved face reflecting type LED backlight module of the present invention, as shown in Figure 1, shown in, described lamp bar 310 (320 or 330) comprises at least one group (/ root/bar) first lamp bar 310 and at least one group (/ root/bar) second lamp bar (320 or/and 330); Described first lamp bar 310 is horizontally installed on the bottom surface 110 of backboard 100; On the top side face 120 that described second lamp bar 320 (or/and 330) is horizontally installed on backboard chamber and/or bottom side 130; Form the illumination mode that side entering type mixes mutually with straight-down negative thus.
The light that LED lamp source on described second lamp bar (320 or/and 330) sends can air-borne transmission in the backboard chamber not having light guide plate, part light shines directly on diffuse optical parts 200, and another part light arrives on diffuse optical parts 200 through the reflection of curved face type reflector plate 400; Arrive the light on diffuse optical parts 200, a part of refraction enters diffuse optical parts 200 inside and carries out diffuse reflection, and another part is reflected back on curved face type reflector plate 400 and continues to propagate, until refraction enters diffuse optical parts 200 inside; The region that the light that seems is more weak distance the second lamp bar (320 or 330) is comparatively far away, so can be compensated by the LED lamp source on described first lamp bar 310.
Being preferably, in order to the thickness in thinning backboard chamber, or in order to reduce the consumption of LED light source in LED-backlit module, optical lens can being increased in the LED lamp source of described first lamp bar 310.
In the embodiment shown in fig. 1, on described first lamp bar 310, the light-emitting area of LED lamp source parallels with the bottom surface 110 in backboard chamber, and the upper light-emitting area of LED lamp source of described second lamp bar (320 or 330) parallels with the top side face 120 in backboard chamber or bottom side 130; Namely the installed surface of the second lamp bar (320 or 330) is arranged with the installed surface of the first lamp bar 310 is mutually vertical; The position of described first lamp bar 310 and quantity can be determined according to the position of described second lamp bar (320 or 330) and quantity; When described second lamp bar 320 is only arranged on the top side face 120 in backboard chamber, described first lamp bar 310 can be arranged on the latter half of bottom surface, backboard chamber 110; When described second lamp bar 330 is only arranged on the bottom side 130 in backboard chamber, described first lamp bar 310 can be arranged on the first half of bottom surface, backboard chamber 110; When described second lamp bar (320 and 330) is separately positioned on top side face 120 and the bottom side 130 in backboard chamber, described first lamp bar 310 can be arranged on the center section of bottom surface, backboard chamber 110; In addition, the LED lamp source quantity on the LED lamp source quantity on described first lamp bar 310 and described second lamp bar (320 and/or 330), and both proportionate relationships quantitatively, can determine according to the concrete size of LED-backlit module and cost trade-offs.
In the embodiment shown in Figure 2, with the embodiment difference in Fig. 1 be, the installed surface of described second lamp bar (320 and/or 330) is obliquely installed towards the bottom surface 110 in backboard chamber, and namely the light-emitting area of described second lamp bar (320 and/or 330) slopes inwardly setting; The large I of the angle that specifically slopes inwardly is determined according to factors such as the lighting angles of backboard 100 size and LED lamp source itself.
In the embodiment shown in fig. 3, with the embodiment difference in Fig. 1 be, the installed surface of described second lamp bar (320 and/or 330) is obliquely installed towards diffuse optical parts 200, i.e. the outward-dipping setting of light-emitting area of described second lamp bar (320 and/or 330); The large I of concrete outward-dipping angle is determined according to factors such as the lighting angles of backboard 100 size and LED lamp source itself.
For the embodiment shown in Fig. 1, further, shown in composition graphs 4, the spacing on described first lamp bar 310 between adjacent two LED lamp source 311 is greater than the spacing between upper adjacent two LED lamp source (322 or 333) of described second lamp bar (320 or 330); That is, LED lamp source 311 arranging density on described first lamp bar 310 wants more sparse relative to LED lamp source (the 322 or 333) arranging density on the second lamp bar (320 or 330); To make the lamp shadow on diffuse optical parts 200 more even.Same, the embodiment shown in Fig. 2 and Fig. 3 also can have structure similar to Figure 4, does not repeat them here.
Based on above-mentioned curved face reflecting type LED backlight module, the invention allows for a kind of liquid crystal display, comprise the LED-backlit module at liquid crystal board and the back side thereof; Described liquid crystal board and LED-backlit module are all arranged in the enclosure; Wherein: described LED-backlit module can be set to the flat reflective LED-backlit module described in above-mentioned any one specific embodiment.
Compared with liquid crystal display of the prior art and LED-backlit module thereof, a kind of liquid crystal display provided by the present invention and curved face reflecting type LED backlight module thereof, owing to have employed the curved face type reflector plate of concave surface facing diffuse optical parts, directly by the part light reflection of LED lamp source on diffuse optical parts, and the light reflected from diffuse optical parts surface is reflected again, until turn back on diffuse optical parts, alleviate bar blocks shape brightness disproportionation or the phenomenon such as lamp shadow that existing LED-backlit module produces, save light guide plate, decrease the consumption of LED lamp source and pcb board thereof, also the consumption even saving LED lamp source optical lens is reduced, greatly reduce the material cost of LED-backlit module, structure is simple simultaneously, easy to process, is easy to batch production, and is applicable to the structural member using original CCFL machine.
Should be understood that; the foregoing is only preferred embodiment of the present invention; be not sufficient to limit technical scheme of the present invention; for those of ordinary skills; within the spirit and principles in the present invention; can be increased and decreased according to the above description, replaced, converted or improved, and all these increases and decreases, replacement, conversion or the technical scheme after improving, all should belong to the protection domain of claims of the present invention.
Claims (5)
1. a curved face reflecting type LED backlight module, comprises the backboard chamber being made up of air transmitted LED lamp source light backboard and diffuse optical parts; Backboard is provided with the lamp bar of welding LED lamp source; It is characterized in that: the reflector plate being also provided with curved face type in described backboard chamber, for light reflection that LED lamp source on lamp bar is sent to diffuse optical parts; The transversal section of described reflector plate is smooth arc line shaped, and the concave surface facing diffuse optical parts of reflector plate, the curved below being positioned over described lamp bar of described reflector plate; Described lamp bar comprises the first lamp bar and the second lamp bar; Described first lamp bar is arranged on the bottom surface in backboard chamber; Described second lamp bar is arranged on the side in backboard chamber, and the spacing on described first lamp bar between adjacent two LED lamp source is greater than the spacing on described second lamp bar between adjacent two LED lamp source.
2. curved face reflecting type LED backlight module according to claim 1, is characterized in that: the installed surface of described second lamp bar is arranged with the installed surface of the first lamp bar is mutually vertical.
3. curved face reflecting type LED backlight module according to claim 1, is characterized in that: the installed surface of described second lamp bar is arranged towards the inclined bottom surface in backboard chamber.
4. curved face reflecting type LED backlight module according to claim 1, is characterized in that: the installed surface of described second lamp bar is obliquely installed towards diffuse optical parts.
5. a liquid crystal display, comprises the LED-backlit module at liquid crystal board and the back side thereof; Described liquid crystal board and LED-backlit module are all arranged in the enclosure; It is characterized in that: described LED-backlit module is set to the curved face reflecting type LED backlight module according to any one of Claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110314605.4A CN102434823B (en) | 2011-10-17 | 2011-10-17 | A kind of liquid crystal display and curved face reflecting type LED backlight module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110314605.4A CN102434823B (en) | 2011-10-17 | 2011-10-17 | A kind of liquid crystal display and curved face reflecting type LED backlight module thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102434823A CN102434823A (en) | 2012-05-02 |
| CN102434823B true CN102434823B (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110314605.4A Active CN102434823B (en) | 2011-10-17 | 2011-10-17 | A kind of liquid crystal display and curved face reflecting type LED backlight module thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI468807B (en) * | 2012-05-11 | 2015-01-11 | Young Lighting Technology Inc | Backlight module |
| CN104332112A (en) * | 2014-10-24 | 2015-02-04 | 深圳市华星光电技术有限公司 | Transparent display device |
| CN115013754B (en) * | 2021-03-05 | 2023-06-06 | 北京字节跳动网络技术有限公司 | Light-emitting module and desk lamp |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859037A (en) * | 2009-04-10 | 2010-10-13 | 康佳集团股份有限公司 | Liquid crystal display (LCD) device |
| CN101907249A (en) * | 2009-06-08 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN101968185A (en) * | 2010-07-30 | 2011-02-09 | 南京中电熊猫液晶显示科技有限公司 | Thin-type LED (Light-Emitting Diode) backlight source |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002107720A (en) * | 2000-09-29 | 2002-04-10 | Koichi Matsui | Vertically illuminating illuminaire for plural light sources |
| JP2004227991A (en) * | 2003-01-24 | 2004-08-12 | Koichi Matsui | Directly-under type lighting device |
| JP2009134922A (en) * | 2007-11-29 | 2009-06-18 | Sumitomo Chemical Co Ltd | Surface light source device |
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- 2011-10-17 CN CN201110314605.4A patent/CN102434823B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859037A (en) * | 2009-04-10 | 2010-10-13 | 康佳集团股份有限公司 | Liquid crystal display (LCD) device |
| CN101907249A (en) * | 2009-06-08 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN101968185A (en) * | 2010-07-30 | 2011-02-09 | 南京中电熊猫液晶显示科技有限公司 | Thin-type LED (Light-Emitting Diode) backlight source |
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| Publication number | Publication date |
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| CN102434823A (en) | 2012-05-02 |
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