CN109976037A - A kind of side-edge type backlight and its display device - Google Patents
A kind of side-edge type backlight and its display device Download PDFInfo
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- CN109976037A CN109976037A CN201910270165.3A CN201910270165A CN109976037A CN 109976037 A CN109976037 A CN 109976037A CN 201910270165 A CN201910270165 A CN 201910270165A CN 109976037 A CN109976037 A CN 109976037A
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- reflecting element
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- type backlight
- light
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- 239000000758 substrate Substances 0.000 claims abstract description 22
- 239000013307 optical fiber Substances 0.000 claims abstract description 19
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 6
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 6
- 230000004308 accommodation Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 239000004417 polycarbonate Substances 0.000 claims description 5
- 229920000515 polycarbonate Polymers 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 230000011514 reflex Effects 0.000 abstract 1
- 239000004973 liquid crystal related substance Substances 0.000 description 7
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- 150000004702 methyl esters Chemical class 0.000 description 2
- 229920002972 Acrylic fiber Polymers 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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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention relates to a kind of side-edge type backlight and its display devices, and wherein side-edge type backlight includes: substrate, condenser, diffusing reflection backboard and double-sided prism diffuser plate.Wherein condenser includes bracket, light source, the first reflecting element, the second reflecting element and connection frame.The wide-angle class Lambertian source primary compression that the present invention is issued LED using the optical fiber lens of condenser is at low-angle；Then the very small angles light after being converged optical fiber lens for the first time using the notch on the upper bottom surface of the first reflecting element is passed through, the wide-angle class Lambertian source that optical fiber lens tentatively couple is subjected to first second reflecting surface that reflexes to using the first reflecting surface and carries out the emergent light that secondary reflection finally obtains low-angle, to avoid using light guide plate, production cost is reduced, influence of the warpage problem of light guide plate for optical property is avoided.
Description
Technical field
The present invention relates to field of display technology, and in particular to a kind of side-edge type backlight and its display device.
Background technique
With the continuous development of LCD technology, the application field of liquid crystal display especially colour liquid crystal display device
Constantly widening.It is pulled by the market of liquid crystal display, backlight industry, have an air of prosperity scene.Liquid crystal display is passive
Light-emitting component, display screen itself do not shine, but illuminated by backlight below.Backlight and liquid crystal display combination
LCD MODULE is constituted together.
So-called backlight (BackLight) is a kind of light source positioned at the behind liquid crystal display (LCD), its illumination effect
LCD MODULE (LCM) visual effect will be directly influenced.Backlight is mainly by light source, light guide plate, optical film piece, plastic cement
The composition such as frame.Backlight has brightness high, and the service life is long, shines the features such as uniform.Under being then divided into directly according to distribution of light sources position difference
Formula backlight and side-light backlight.
Direct-light-type backlight is that light source (LED wafer array) and printed circuit board are placed in backlight bottom, and light is from LED
After injection, equably projected by the reflector plate of bottom, then by the diffuser plate on surface, brightness enhancement film.
Side-light backlight is that the side that the light guide plate Jing Guo special designing is arranged in linear or point source of light is made into
Backlight.Light guide plate principle is that the interference phenomenon of light is destroyed using the network point distribution at guide-lighting acrylic plate bottom, and linear light source is uniform
It is converted into area source, its role is to guide the scattering direction of light, allows the distribution of light is more uniform to make to can't see reflection from front
The shadow of point, for improving the brightness of panel, and ensures the uniformity of panel luminance, and wherein the excellent of light guide plate influences backlight
It is very big.
LCD backlight is the uniform illumination device of a plane, and the cathode fluorescent tube or LED light bar as light source are arranged
It is listed in both sides or one side (may be long side, it is also possible to short side) of entire backlight.Cold cathode tube is linear light source, and LED is
This light source is converted to area source and needed using light guide plate by point light source.Light guide plate is generally by the acrylic plastics system of high transparency
At, surface is very smooth and flat, so that the total reflection that most of internal light can be regular on its flat surface, without penetrating
Out to outside light guide plate.The bottom of the light guide plate of liquid crystal display is printed on the site of white.The position of site is printed in light guide plate
On, the no longer regular total reflection of light but can be to projecting above light guide plate.The density for controlling each position site can be controlled
How much irradiant light guide plate processed is in this position.The light guide plate mesh point of sophisticated design can allow the light of two sides incidence uniform
Paving be dispersed in entire plane.Optical diaphragm can be placed again above light guide plate, these diaphragms play uniform light, and converge big
The effects of angular light is observed for front.
Since side-edge type backlight uses this optical element of light guide plate, what can be manufactured is very thin, is conducive to LCD
The slimming of display develops.However the introducing of light guide plate, since LED generates a large amount of heat in lighting process,
It will cause that temperature is excessively high in the narrow cavity of side-edge type backlight, and then cause the warpage issues of light guide plate, so as to cause existing
Side-edge type backlight light efficiency sharp fall.It further, can be to specific emission wavelength with the aging of light guide panel material
Delustring is generated, this problem will further influence to show color.And due to complicated optical texture, so that production cost increases
Add.Therefore need to seek the novel side-edge type backlight of one kind to improve the above problem.
Summary of the invention
It is an object of the present invention to provide a kind of side-edge type backlight and its display devices, are able to solve current side
Enter the problems such as light efficiency in formula backlight reduces, shows color difference, is at high cost.
To solve the above-mentioned problems, an embodiment of the invention provides a kind of side-edge type backlight, including
Substrate and condenser, the condenser are set on the substrate.Wherein the condenser includes: bracket, light source, the first reflection
Part, the second reflecting element and connection frame.First reflecting element is truncated cone-shaped, and the lateral surface of first reflecting element is first anti-
Penetrate face；Second reflecting element is arranged on the bracket, second reflecting element be truncated cone-shaped, second reflecting element it is interior
Side is the second reflecting surface；First reflecting element is fixed on second reflecting element by the connection frame.
Further, wherein the bracket is equipped with a lug boss, wherein being equipped with a surface opening simultaneously in the lug boss
To the accommodation groove of lower recess, the light source is set to the accommodating trench bottom.
Further, wherein being additionally provided with an optical fiber lens on the bracket, the optical fiber lens are set to the accommodation groove
It is interior.
Further, wherein first reflecting element, the second reflecting element, light source and optical fiber lens coaxial arrangement.
Further, wherein the upper bottom surface of first reflecting element is equipped with a notch, the notch and the light source are in institute
The projection stated on the upper bottom surface of the first reflecting element overlaps.
Further, wherein the composition material of first reflecting element, the second reflecting element includes polycarbonate, poly- methyl-prop
One of e pioic acid methyl ester and K9 glass are a variety of.
Further, wherein the side-edge type backlight includes two substrates, described two substrates are parallel to each other and set relatively
It sets, is equipped with the condenser on two substrates.
Further, wherein the side-edge type backlight further includes diffusing reflection backboard, the diffusing reflection backboard is set to institute
It states above substrate.
Further, wherein the side-edge type backlight further includes double-sided prism diffuser plate, the double-sided prism diffuser plate
It is set to below the substrate.
Another embodiment of the invention additionally provides a kind of display device, including side entering type of the present invention
Backlight.
The invention has the advantages that first on the one hand, being utilized the present invention relates to a kind of side-edge type backlight and its display device
Notch on the upper bottom surface of first reflecting element passes through the very small angles light that optical fiber lens converge for the first time, on the other hand using poly-
The LED light issued is done preliminary coupling by the optical fiber lens of light device, by LED issue wide-angle class Lambertian source primary compression at
Low-angle, the wide-angle class Lambertian source tentatively coupled using the first reflecting surface to optical fiber lens carry out just secondary reflection, utilize the
Two reflectings surface carry out secondary reflection to incident light, finally obtain the emergent light of low-angle, to avoid using light guide plate, drop
Low production cost avoids influence of the warpage problem of light guide plate for optical property.Secondly will be entered using diffusing reflection backboard
The light for being mapped to surface dissipates in all directions, plays the role of uniform light；Table will be incident on using double-sided prism diffuser plate
The light in face is diffused, and serious Fresnel reflection problem caused by avoiding graze angular too big increases light extraction efficiency,
Increase light uniformity.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those skilled in the art, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the structural schematic diagram of side-edge type backlight of the present invention.
Fig. 2 is the structural schematic diagram of the condenser in side-edge type backlight of the present invention.
Fig. 3 is the light schematic diagram in the condenser in side-edge type backlight of the present invention.
Component mark is as follows in figure:
100, side-edge type backlight
1,2 condenser of substrate
3, diffusing reflection backboard 4, double-sided prism diffuser plate
21, bracket 22, light source
23, optical fiber lens 24, the first reflecting element
25, the second reflecting element 26, connection frame
241, the first reflecting surface 251, the second reflecting surface
Specific embodiment
Below in conjunction with Figure of description, the preferred embodiments of the present invention are described in detail, with complete to those of skill in the art
It is whole to introduce technology contents of the invention, prove that the present invention can be implemented with citing, so that technology contents disclosed by the invention are more
It is clear, so that will more readily understand how implement the present invention by those skilled in the art.However the present invention can pass through many differences
The embodiment of form emerges from, and protection scope of the present invention is not limited only to the embodiment mentioned in text, Examples below
The range that is not intended to limit the invention of explanation.
The direction term that the present invention is previously mentioned, for example, "upper", "lower", "front", "rear", "left", "right", "inner", "outside", "
Side " etc. is only the direction in attached drawing, and direction term used herein is of the invention for explanation and illustration, rather than is used
To limit the scope of protection of the present invention.
In the accompanying drawings, the identical component of structure is indicated with same numbers label, everywhere the similar component of structure or function with
Like numeral label indicates.In addition, in order to facilitate understanding and description, the size and thickness of each component shown in the drawings are any
It shows, the present invention does not limit the size and thickness of each component.
When certain components, when being described as " " another component "upper", the component can be placed directly within described another group
On part；There may also be an intermediate module, the component is placed on the intermediate module, and the intermediate module is placed in another group
On part.When a component is described as " installation is extremely " or " being connected to " another component, the two can be understood as direct " installation "
Or " connection " or a component pass through an intermediate module " installation is extremely " or " being connected to " another component.
Embodiment 1
As shown in Figure 1, the side-edge type backlight of the present embodiment, including two substrates 1, condenser 2, diffusing reflection backboard
3 and double-sided prism diffuser plate 4.Wherein described two substrates 1 are arranged in parallel；The condenser 2 is set to the substrate 1
On.
As shown in Fig. 2, wherein the condenser 2 include: bracket 21, light source 22, optical fiber lens 23, the first reflecting element 24 with
And second reflecting element 25.
As shown in Fig. 2, wherein the bracket 21 is equipped with a lug boss, wherein being equipped with a surface opening in the lug boss
And to the accommodation groove of lower recess, the light source 22 is set to the accommodating trench bottom, and the optical fiber lens 23 are set to the appearance
It sets in slot.Wherein first reflecting element 24, the second reflecting element 25, light source 22 and optical fiber lens 23 are coaxially disposed.Thus have
Conducive to multiple reflections of the light in condenser, spotlight effect is realized.
As shown in Fig. 2, wherein first reflecting element 24 is truncated cone-shaped, the lateral surface of first reflecting element 24 is first
Reflecting surface 241；Second reflecting element 25 is set on the bracket 21, and second reflecting element 25 is truncated cone-shaped, and described the
The medial surface of two reflecting elements 25 is the second reflecting surface 251；First reflecting element 24 is fixed on described by the connection frame 26
On second reflecting element 25, wherein the connection frame 26 is made of the excellent material of light transmission, it is possible thereby to allow by second
Light after reflecting surface 251 reflects passes through.Wherein the upper bottom surface of first reflecting element 24 is equipped with a notch, the notch and institute
Projection of the light source 22 on the upper bottom surface of first reflecting element 24 is stated to overlap.It is possible thereby to realize what light source 22 was launched
Low-angle light, which is perforated through after optical fiber lens 23, directly to be projected by notch.
As shown in figure 3, being divided into two parts by the light that light source 22 is launched, a part is to carry out by optical fiber lens 23 just
The light of low-angle after step coupling directly passes through the injection of the notch on the upper bottom surface of the first reflecting element 24；Another part be by
Optical fiber lens 23 carry out the wide-angle class Lambertian source primary compression after tentatively coupling into low-angle to first reflecting surface 241
Upper carry out primary reflective, then light is reflected into second reflecting surface 251 again and carries out secondary instead by first reflecting surface 241
It penetrates, is finally converted into the beam projecting of low-angle, so that big graze lighting area is obtained, to avoid using light guide plate, drop
Low production cost avoids influence of the warpage problem of light guide plate for optical property.
Wherein the light source 22 can use LED chip, and the light source 22 being consequently formed is more efficient, more stable, letter patience is tall and erect
More, the light luminance of transmitting is high.
Wherein first reflecting surface 24, the second reflecting surface 25 composition material include polycarbonate (PC), poly- methyl-prop
One of e pioic acid methyl ester (PMMA) and K9 glass are a variety of.The first reflecting surface 24, the second reflecting surface 25 being consequently formed are saturating
Light rate is high, UV resistant effect is good.
The condenser 2 that 1 quantity wherein can be set on the substrate 1, also can be set the optically focused of 2 or more quantity
Device 2.It is possible thereby to determine the quantity of condenser 2 according to the actual situation, production cost is thus controlled.
Wherein the diffusing reflection backboard 3 is set to described two 1 tops of substrate；The composition material of the diffusing reflection backboard 3
Including one of polycarbonate (PC), polymethyl methacrylate (PMMA) and K9 glass or a variety of.Being achieved in will enter
The light for being mapped to 3 surface of diffusing reflection backboard dissipates in all directions, to have the function that uniformly light-emitting.
Wherein the double-sided prism diffuser plate 4 and the diffusing reflection backboard 3 are arranged in parallel under described two substrates 1
Side；The composition material of the double-sided prism diffuser plate 4 includes polycarbonate (PC), polymethyl methacrylate (PMMA) and K9
One of glass is a variety of.It is achieved in and passes through the light for being incident on the wide-angle on 4 surface of double-sided prism diffuser plate
The multiple refraction of two prism facets, becomes low-angle light, avoids the problem that the Fresnel reflection that high angle scattered light outgoing generates,
It avoids light ray energy from losing, improves light extraction efficiency, increase light uniformity.
Another embodiment of the invention additionally provides a kind of display device, including side entering type of the present invention
Backlight 100.
Side-edge type backlight provided by the present invention and its display device are described in detail above.It should be understood that this
Illustrative embodiments described in text should be to be considered only as descriptive, be used to help to understand that method and its core of the invention are thought
Think, and is not intended to restrict the invention.The description of features or aspect should be usually considered in each illustrative embodiments
Similar features or aspects suitable for other exemplary embodiments.Although reference example embodiment describes the present invention,
It can suggest that those skilled in the art carries out various change and change.The invention is intended to cover the scope of the appended claims
These interior variations and change, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention,
It should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of side-edge type backlight characterized by comprising
Substrate；
Condenser, the condenser are set on the substrate, and the condenser includes:
Bracket；
Light source, the light source are installed on the bracket；
First reflecting element, first reflecting element are truncated cone-shaped, and the lateral surface of first reflecting element is the first reflecting surface；
Second reflecting element, second reflecting element are arranged on the bracket, second reflecting element be truncated cone-shaped, described second
The medial surface of reflecting element is the second reflecting surface；And
Connection frame, first reflecting element are fixed on second reflecting element by the connection frame.
2. side-edge type backlight according to claim 1, which is characterized in that the bracket is equipped with a lug boss, wherein
A surface opening and the accommodation groove to lower recess are equipped in the lug boss, the light source is set to the accommodating trench bottom.
3. side-edge type backlight according to claim 2, which is characterized in that an optical fiber lens are additionally provided on the bracket,
The optical fiber lens are set in the accommodation groove.
4. side-edge type backlight according to claim 3, which is characterized in that first reflecting element, the second reflecting element, light
Source and optical fiber lens coaxial arrangement.
5. side-edge type backlight according to claim 1, which is characterized in that the upper bottom surface of first reflecting element is equipped with one
Notch, the notch overlap with projection of the light source on the upper bottom surface of first reflecting element.
6. side-edge type backlight according to claim 1, which is characterized in that first reflecting element, the second reflecting element
Composition material includes one of polycarbonate, polymethyl methacrylate and K9 glass or a variety of.
7. side-edge type backlight according to claim 1, which is characterized in that including two substrates, described two substrate phases
It is mutually oppositely arranged in parallel, is equipped with the condenser on two substrates.
8. side-edge type backlight according to claim 1, which is characterized in that further include:
Diffusing reflection backboard, the diffusing reflection backboard are set to above the substrate.
9. side-edge type backlight according to claim 1, which is characterized in that further include:
Double-sided prism diffuser plate, the double-sided prism diffuser plate are set to below the substrate.
10. a kind of display device, which is characterized in that including side-edge type backlight described in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270165.3A CN109976037B (en) | 2019-04-04 | 2019-04-04 | Lateral backlight source and display device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270165.3A CN109976037B (en) | 2019-04-04 | 2019-04-04 | Lateral backlight source and display device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109976037A true CN109976037A (en) | 2019-07-05 |
| CN109976037B CN109976037B (en) | 2021-12-03 |
Family
ID=67082933
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910270165.3A Active CN109976037B (en) | 2019-04-04 | 2019-04-04 | Lateral backlight source and display device thereof |
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| Country | Link |
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| CN (1) | CN109976037B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110361891A (en) * | 2019-07-29 | 2019-10-22 | 武汉华星光电技术有限公司 | Backlight module |
| CN110432024A (en) * | 2019-07-22 | 2019-11-12 | 华南理工大学 | It is a kind of with condenser without light guide plate side entering type RGB COB light source device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109976037B (en) | 2021-12-03 |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant after: TCL China Star Optoelectronics Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |
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