CN105090820A - Backlight source and display device - Google Patents
Backlight source and display device Download PDFInfo
- Publication number
- CN105090820A CN105090820A CN201510448259.7A CN201510448259A CN105090820A CN 105090820 A CN105090820 A CN 105090820A CN 201510448259 A CN201510448259 A CN 201510448259A CN 105090820 A CN105090820 A CN 105090820A
- Authority
- CN
- China
- Prior art keywords
- illuminator
- backlight
- light guide
- guide plate
- circuit board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
- F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
-
- 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
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- 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
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a backlight source and a display device. The backlight source comprises light guide plates and light bars, wherein the light guide plates are internally provided with spacing slots and the light bars comprise circuit boards and illuminants electrically connected to the circuit boards, the illuminants are located in the spacing slots and give out light to the two sides of the spacing slots. The display device comprises the backlight source. According to the backlight source and the display device provided by the invention, the brightness uniformity of the backlight source can be ensured, and the stability of the backlight source structure can be maintained while the overall brightness of the backlight source is improved by increasing the quantity of the illuminants.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of backlight and display unit.
Background technology
Due to features such as giant-screen mobile phone display effect are true to nature, Multimedia good, experience is good, be easily subject to the favor of cellphone subscriber.And increasingly accelerate along with mobile phone screen enlarging, the brightness of mobile phone backlight, structural stability are had higher requirement.
Light source (as LED lamp bar) in current mobile phone screen, is arranged on limit relatively short on light guide plate, makes whole mobile phone screen that light occur by this lamp bar luminescence.Improve the brightness of mobile phone backlight, the most effective way is exactly the number increasing LED.Be limited to back light source structure constraint, if the LED that LED lamp bar is fitted number is more, structural stability can be poorer, is thus difficult to the brightness improving backlight.
Summary of the invention
The invention provides a kind of backlight and display unit, can solve prior art exist be difficult to improve backlight brightness while ensure constitutionally stable problem.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of backlight, this backlight comprises light guide plate and lamp bar.Light guide plate inside offers interval trough.Lamp bar comprises circuit board and is connected electrically in the illuminator on described circuit board, and described luminous body position is in described interval trough, and described illuminator is luminous towards the both sides of described interval trough.
Wherein, described lamp bar comprises two, and the circuit board of two described lamp bars is bonded to each other.
Wherein, one deck graphene sheet layer is provided with between two described circuit boards.
Wherein, described lamp bar is provided with one, and the described illuminator on this lamp bar is luminous towards the both sides of described interval trough.
Wherein, described circuit board is provided with a discharge body of light, and the light emission direction of adjacent described illuminator is contrary.
Wherein, described circuit board is provided with two discharge body of light, and the light emission direction of the described illuminator of two rows is contrary.
Wherein, the light guide plate of described interval trough both sides is also provided with the installing hole for installing described illuminator.
Wherein, described interval trough is middle straight trough, multiple parallel slot, cannelure or rectangular channel.
Wherein, described backlight also comprises reflector plate, and described reflector plate is arranged on the below of described light guide plate, and the light for being sent by described illuminator reflexes to described light guide plate, slotted eye is provided with, for placing described circuit board on described reflector plate, corresponding to the position of described circuit board.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind of display unit, and this display unit comprises above-mentioned backlight.
The invention has the beneficial effects as follows: the situation being different from prior art, the present invention is by arranging interval trough in light guide plate inside, and the illuminator of lamp bar is placed in this interval trough, make illuminator luminous towards the both sides of interval trough, ensure that the uniformity of the brightness of backlight, and while the brightness of backlight entirety can being promoted by the number increasing illuminator, keep the stability of back light source structure.In addition, because illuminator is arranged in the interval trough of light guide plate, thus in the below of light guide plate without the need to the placement illuminator that takes up room, make the thickness that this backlight module can remain thinner.
Accompanying drawing explanation
Fig. 1 is the cross section structure schematic diagram of backlight first embodiment of the present invention;
Fig. 2 is the plan structure schematic diagram of backlight first embodiment of the present invention;
Fig. 3 is the enlarged drawing of a-quadrant in Fig. 2;
Fig. 4 is the cross section structure schematic diagram of backlight second embodiment of the present invention;
Fig. 5 is the plan structure schematic diagram in backlight second embodiment of the present invention, shows row's LED simultaneously luminous to both sides;
Fig. 6 is the plan structure schematic diagram in backlight second embodiment of the present invention, shows in row's LED, and adjacent LED is luminous respectively to rightabout;
Fig. 7 is the plan structure schematic diagram in backlight second embodiment of the present invention, and direction towards the opposite is luminous respectively to show two row's LED;
Fig. 8 is the cross section structure schematic diagram of display unit embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Refer to Fig. 1, Fig. 2 and Fig. 3, the invention provides a kind of backlight, the blooming piece 140 that this backlight comprises light guide plate 100, lamp bar 110, reflector plate 120 and is arranged on above light guide plate.
Particularly, light guide plate 100 inside offers interval trough 101.Light guide plate 100 is the acrylic/PC sheet material utilizing optical grade, then with having high reflectivity and the hitech materials of not extinction, forms light guiding points in the acryl plates bottom surface of optical grade.Utilize optical grade acryl plates to draw the stop of light on optical grade acryl plates surface sent from lamp, when light is mapped to each light guiding points, reverberation toward all angles diffusion, then can destroy conditioned reflex and is penetrated by light guide plate 100 front.By various density, light guiding points not of uniform size, light guide plate 100 uniformly light-emitting can be made.
Interval trough 101 is offered in light guide plate 100 inside of the present invention, such as, digs one and run through the upper and lower groove of light guide plate in one piece of light guide plate.This interval trough 101 can be middle straight trough, multiple parallel slot, cannelure or rectangular channel, and certainly, it can also be designed to the interval trough 101 of other shape according to actual needs.
Lamp bar 110 comprises circuit board 111 and electrical connection illuminator 112 on circuit boards, and illuminator 112 is positioned at interval trough 101, and illuminator is luminous towards the both sides of interval trough 101.
Wherein, circuit board 111 can be flexible PCB, and flexible PCB is that the one made for base material with polyimides or polyester film has height reliability, excellent flexible printed circuit.Have the advantages that distribution density is high, lightweight, thickness is thin, bending property is good.Certainly, can also be the circuit board that other this area is commonly used.The golden finger end of circuit board 111 can cabling to the both sides of light guide plate 100, or golden finger can also be done length, then foldingly reach top.
It is inner that lamp bar 110 is arranged on light guide plate 100 as light source, and illuminator 112 is positioned at interval trough 101, and luminous towards the both sides of interval trough 101, and in the present embodiment, the pin pin of illuminator 112 is drawn from the both sides of light guide plate 100.Because illuminator 112 is arranged on interval trough 101 inside, thus illuminator 112 and light guide plate 100 are positioned at a plane, and in the below of light guide plate 100, illuminator 112 does not take up room, and the light that illuminator 112 sends is horizontally through light guide plate 100.For example, if interval trough 101 is middle straight troughs, then illuminator 112 is luminous from light guide plate 100 inside to the outer end of light guide plate 100.If interval trough 101 is cannelures, illuminator is then respectively towards luminous from annular towards the inside of the annular on light guide plate and outer end.The backlight of lamp bar 110 is set relative to the side at light guide plate 100, lamp bar 110 is arranged on the inside of light guide plate 100, the brightness in the middle of backlight can be made to be promoted, and the brightness of whole backlight can be made more even.In addition, illuminator 112 is arranged in interval trough 101, and illuminator 112 and light guide plate 100 are positioned in a plane, can the thickness of thinning backlight.
Illuminator 112 is electrically connected with circuit board 111, and in the present embodiment, illuminator 112 is LED, and LED is fixed on a face of circuit board 111.Certainly, this illuminator 112 can also be other illuminator that EL or this area are commonly used.
In order to strengthen the stability of structure between lamp bar 110 and light guide plate 100, light guide plate 100 is also provided with the structure for fixed light bar 110, such as, on the light guide plate 100 of interval trough 101 both sides, the installing hole (not shown) of hole formation for installing illuminator is scratched in position corresponding to illuminator 112, and illuminator 112 is fastened in this installing hole.
In the present embodiment, interval trough 101 is straight troughs in the middle of, and backlight comprises two lamp bars 110, and every bar lamp bar 110 includes one piece of flexible PCB and is connected electrically in the LED on flexible PCB, and the circuit board 111 of two lamp bars 110 is bonded to each other.Specifically, LED is fitted on a face of flexible PCB, and another face of LED that flexible PCB is not fitted is bonded to each other, i.e. two pieces of back-to-back laminatings of flexible PCB, in order to be beneficial to two pieces of flexible PCB heat radiations, between two flexible PCBs, can also heat dissipating layer be set, such as, the fin of the present embodiment is one deck graphene sheet layer 130, Graphene is a kind of Two-dimensional Carbon material, it has high-termal conductivity, thus graphene sheet layer 130 is set between flexible PCB and can makes two pieces of flexible PCB quick heat radiatings, thus the performance of backlight can be maintained, increase the service life.After two pieces of flexible PCBs are bonded to each other, be connected with the both sides of another side towards interval trough of LED, the LED on it is then towards the both sides of this interval trough, and namely two outer ends of light guide plate 100 are luminous.
Reflector plate 120 is arranged on the below of light guide plate 100, and the light for being sent by illuminator 112 reflexes to light guide plate 100, is provided with slotted eye 121, for placing circuit board 111 on reflector plate 120, corresponding to the position of circuit board 111.Setting up of this slotted eye 121 makes circuit board 111 can put into reflector plate 120 inside, and without the need to taking up room for placing circuit board 111 again between reflector plate 120 and light guide plate 100, thus can reduce the thickness of backlight.In the present embodiment, a flexible PCB part bonded to each other is positioned at interval trough 101, and a part extend out in the slotted eye 121 on reflector plate 120.
Blooming piece 140 is arranged on the top of light guide plate 100, can comprise brightening piece and diffusion sheet etc., not limit at this.
Glue frame 150, plays a part to be connected, to support and to protect to backlight assemblies such as light guide plate 100, reflector plate 120 and blooming pieces 140.Specifically, the two ends of the flexible PCB in the present embodiment and lamp bar 110 are covered on the support column of glue frame, and the support column of glue frame 150 can adopt metal material to make, thus are beneficial to flexible PCB and lamp bar 110 dispels the heat.
Be different from prior art, the present invention is by arranging interval trough 101 in light guide plate 100 inside, and the illuminator 112 of lamp bar 110 is placed in this interval trough 101, make illuminator 112 luminous towards the both sides of interval trough 101, ensure that the uniformity of the brightness of backlight, and while the brightness of backlight entirety can being promoted by the number increasing illuminator 112, keep the stability of back light source structure.In addition, because illuminator 112 is arranged in the interval trough 101 of light guide plate 100, thus placing illuminator 112 in the below of light guide plate 100 without the need to taking up room, making the thickness that this backlight module can remain thinner.
Refer to Fig. 4 to Fig. 7, the difference of the present embodiment and above-mentioned first embodiment is, the backlight of the present embodiment comprises a lamp bar 210, the LED 212 that this lamp bar 210 comprises one piece of flexible PCB 211 and is connected electrically on flexible PCB 211, the LED 212 on this lamp bar 210 is luminous towards the both sides of interval trough 201.
For example, the both sides of each LED 212 energy simultaneously towards interval trough 201 on this lamp bar 210 are luminous, as shown in Figure 5.
Or, as shown in Figure 6, this lamp bar 210 is provided with row's LED 212, the light emission direction of adjacent LED 212 is contrary, such as, first LED 212 is luminous towards light guide plate 200 outer end on the left side, second LED 212 is luminous towards light guide plate 200 outer end on the right, 3rd LED 212 is luminous towards light guide plate 200 outer end on the left side, 4th LED, 212 light guide plate 200 outer ends towards the right are luminous ... by that analogy, can make the uniform light of the both sides of interval trough 201 like this, in the present embodiment, the number of the LED 212 on this lamp bar 210 is plural number.
Or the light emission direction that flexible PCB 211 is provided with the described illuminator 212 of two discharge body of light 212, two rows is contrary, namely, as shown in Figure 7, light guide plate 200 outer end of a discharge body of light 212 all towards the left side on the left side is luminous, and the outer end of illuminator 212 all towards the light guide plate 200 on the right on the right is luminous.
In the present embodiment, flexible PCB 211 is placed on the below of LED 212, and whole flexible PCB 211 is all positioned at the slotted eye 221 on reflector plate 220, thus fully can save space.When using this backlight to come from equipment, in the below of this reflector plate 220, the position of flexible PCB 211 correspondence arranges graphene layer 230, ensures that backlight and electronic system keep certain gap, plays heat-blocking action.
Present invention also offers a kind of display unit, this display unit comprises above-mentioned arbitrary backlight 300, and display unit also comprises the display floater 301 be located at above backlight 300, provides display floater 301 1 uniform planar light source by backlight 300.
In sum, design of the present invention can obtain that a kind of brightness is high, brightness uniformity and ultra-thin, slim and graceful, screen is large and well-set backlight.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a backlight, is characterized in that, comprising:
Light guide plate, inside offers interval trough;
Lamp bar, comprises circuit board and is connected electrically in the illuminator on described circuit board, and described luminous body position is in described interval trough, and described illuminator is luminous towards the both sides of described interval trough.
2. backlight according to claim 1, is characterized in that, described lamp bar comprises two, and the circuit board of two described lamp bars is bonded to each other.
3. backlight according to claim 2, is characterized in that, is provided with one deck graphene sheet layer between two described circuit boards.
4. backlight according to claim 1, is characterized in that, described lamp bar is provided with one, and the described illuminator on this lamp bar is luminous towards the both sides of described interval trough.
5. backlight according to claim 4, is characterized in that, described circuit board is provided with a discharge body of light, and the light emission direction of adjacent described illuminator is contrary.
6. backlight according to claim 4, is characterized in that, described circuit board is provided with two discharge body of light, and the light emission direction of the described illuminator of two rows is contrary.
7. backlight according to claim 1, is characterized in that, the light guide plate of described interval trough both sides is also provided with the installing hole for installing described illuminator.
8. backlight according to claim 1, is characterized in that, described interval trough is middle straight trough, multiple parallel slot, cannelure or rectangular channel.
9. backlight according to claim 1, it is characterized in that, described backlight also comprises reflector plate, described reflector plate is arranged on the below of described light guide plate, light for being sent by described illuminator reflexes to described light guide plate, slotted eye is provided with, for placing described circuit board on described reflector plate, corresponding to the position of described circuit board.
10. a display unit, is characterized in that, comprises the backlight described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448259.7A CN105090820A (en) | 2015-07-27 | 2015-07-27 | Backlight source and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448259.7A CN105090820A (en) | 2015-07-27 | 2015-07-27 | Backlight source and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105090820A true CN105090820A (en) | 2015-11-25 |
Family
ID=54571839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510448259.7A Pending CN105090820A (en) | 2015-07-27 | 2015-07-27 | Backlight source and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105090820A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425461A (en) * | 2015-12-08 | 2016-03-23 | 广东长虹电子有限公司 | Single-lamp backlight module |
| CN105425462A (en) * | 2015-12-08 | 2016-03-23 | 广东长虹电子有限公司 | Four-corner lamp backlight module |
| CN106917994A (en) * | 2015-12-25 | 2017-07-04 | 小米科技有限责任公司 | Ray structure and electronic equipment |
| CN108761910A (en) * | 2018-05-28 | 2018-11-06 | 京东方科技集团股份有限公司 | Electronic equipment, display device, backlight module and its light source |
| CN110515237A (en) * | 2019-08-22 | 2019-11-29 | 武汉华星光电技术有限公司 | Backlight module and display device |
| CN111367122A (en) * | 2020-04-03 | 2020-07-03 | 深圳市隆利科技股份有限公司 | Light guide LED lamp panel |
| CN111413826A (en) * | 2020-04-03 | 2020-07-14 | 深圳市隆利科技股份有限公司 | Surface light source backlight device |
| US11099426B2 (en) | 2018-05-14 | 2021-08-24 | Boe Technology Group Co., Ltd. | Backlight module, manufacturing method thereof and display device |
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| CN2722289Y (en) * | 2004-03-18 | 2005-08-31 | 力捷电脑股份有限公司 | Back light mould set |
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| CN2722289Y (en) * | 2004-03-18 | 2005-08-31 | 力捷电脑股份有限公司 | Back light mould set |
| CN1584658A (en) * | 2004-06-01 | 2005-02-23 | 致伸科技股份有限公司 | Planar light source for image scanner |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425461A (en) * | 2015-12-08 | 2016-03-23 | 广东长虹电子有限公司 | Single-lamp backlight module |
| CN105425462A (en) * | 2015-12-08 | 2016-03-23 | 广东长虹电子有限公司 | Four-corner lamp backlight module |
| CN106917994A (en) * | 2015-12-25 | 2017-07-04 | 小米科技有限责任公司 | Ray structure and electronic equipment |
| US11099426B2 (en) | 2018-05-14 | 2021-08-24 | Boe Technology Group Co., Ltd. | Backlight module, manufacturing method thereof and display device |
| CN108761910A (en) * | 2018-05-28 | 2018-11-06 | 京东方科技集团股份有限公司 | Electronic equipment, display device, backlight module and its light source |
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| CN110515237A (en) * | 2019-08-22 | 2019-11-29 | 武汉华星光电技术有限公司 | Backlight module and display device |
| CN111367122A (en) * | 2020-04-03 | 2020-07-03 | 深圳市隆利科技股份有限公司 | Light guide LED lamp panel |
| CN111413826A (en) * | 2020-04-03 | 2020-07-14 | 深圳市隆利科技股份有限公司 | Surface light source backlight device |
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Application publication date: 20151125 |