CN205665498U - Laterally -incoming -type backlight module and display device - Google Patents
Laterally -incoming -type backlight module and display device Download PDFInfo
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- CN205665498U CN205665498U CN201620537146.4U CN201620537146U CN205665498U CN 205665498 U CN205665498 U CN 205665498U CN 201620537146 U CN201620537146 U CN 201620537146U CN 205665498 U CN205665498 U CN 205665498U
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- 235000009537 plain noodles Nutrition 0.000 claims abstract description 13
- 230000001154 acute effect Effects 0.000 claims abstract description 6
- 230000000007 visual effect Effects 0.000 abstract description 4
- 244000144985 peep Species 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 4
- 239000002985 plastic film Substances 0.000 description 4
- 229920006255 plastic film Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012788 optical film Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Optical Elements Other Than Lenses (AREA)
Abstract
The utility model relates to a showing technical field, disclosing a laterally -incoming -type backlight module and display device, wherein, edge -in backlight module includes light guide plate, edge the lamp strip of the income light side setting of light guide plate, and be located the prism piece of play plain noodles one side of light guide plate, wherein, the prism piece is including relative income plain noodles that sets up and play plain noodles, go into the plain noodles towards the light guide plate sets up, just array arrangement has a plurality of miniature triangular prism structures, each on going into the plain noodles the bottom surface of miniature triangular prism structure is acute triangle and each miniature triangular prism structure includes the orientation first side and orientation that the one side at lamp strip place set up belong to the second side that the opposite one side in one side set up with this lamp strip. The visual angle of this edge -in backlight module's emergent ray is narrower, can be used for display device's peep -proof to show to its structure is simpler.
Description
Technical Field
The utility model relates to a show technical field, in particular to side income formula backlight unit and display device.
Background
With the development of society, people have increasingly strong awareness of personal privacy and business confidentiality, and thus, a peep-proof technology for a display device, which is a daily necessity, is in force. At present, a commonly used peep-proof technology for a display device is to add a viewing angle control mechanism, such as a 3M peep-proof film or some active optical elements, to the existing display device, however, the existing display device with the viewing angle control mechanism is often complex in structure and high in cost; therefore, a peep-proof display product with a simple structure is needed in the market at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a side income formula backlight unit and display device for the more complicated problem of display device structure that possesses the peep-proof function among the solution prior art.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a side-in type backlight module comprises a light guide plate, a light bar arranged along the light incident side of the light guide plate, and a prism sheet positioned on one side of the light emergent surface of the light guide plate; wherein,
the prism piece includes relative income plain noodles and the play plain noodles that sets up, the income plain noodles towards the light guide plate sets up, just a plurality of miniature triangular prism structures of arranging in array on the income plain noodles, each the bottom surface of miniature triangular prism structure is acute triangle, and each miniature triangular prism structure includes the orientation the first side that one side that the lamp strip place set up and the orientation and the second side that one side opposite that this lamp strip place set up.
In the side-in type backlight module, light emitted by the light bar can be emitted out after passing through the light guide plate and the prism sheet in sequence, in the process, the light rays emitted from the light guide plate enter the prism sheet from the miniature triangular prism structures arranged on one side of the light incident surface of the prism sheet, because the bottom surface of the miniature triangular prism structure is an acute triangle, the first side surface of the miniature triangular prism structure is arranged towards one side where the light bar is arranged, and the second side surface of the miniature triangular prism structure is arranged towards the side opposite to the side where the light bar is arranged, therefore, most of the light emitted from the light guide plate enters the interior of the micro triangular prism structure from the first side surface thereof, is then totally reflected at the second side surface thereof, and finally exits from the light-emitting surface of the prism sheet, therefore, most of the emergent light is concentrated in a light emergent angle range of the light emergent surface of the prism sheet, and the light emergent angle of the light emergent angle relative to the light guide plate is closer to the normal direction of the light emergent surface; therefore, the final emergent ray of the backlight module has a narrow visual angle, and the peep-proof effect can be realized; compared with the backlight module structure in the prior art, the structure of the backlight module is only added with a prism sheet structure, and optical film structures such as a diffusion sheet and the like in the backlight module in the prior art are omitted, so that the structure is simple.
In summary, the display device using the lateral backlight module has the peep-proof function and a simpler structure.
Preferably, in the prism sheet, an included angle α between a first side surface of each micro triangular prism structure and the light-emitting surface of the prism sheet is 10 to 85 degrees, and an included angle β between a second side surface of each micro triangular prism structure and the light-emitting surface of the prism sheet is 10 to 85 degrees.
Preferably, in the prism sheet, an included angle α between the first side surface of each micro triangular prism structure and the light-emitting surface of the prism sheet and an included angle β between the second side surface of each micro triangular prism structure and the light-emitting surface of the prism sheet satisfy the following formula: β ═ 180 ° - α)/2.
Preferably, in the prism sheet, an included angle α between the first side surface of each micro triangular prism structure and the light-emitting surface of the prism sheet and an included angle β between the second side surface of each micro triangular prism structure and the light-emitting surface of the prism sheet satisfy the following formula: beta < (180-alpha)/2.
Preferably, in the prism sheet, an included angle α between the first side surface of each micro triangular prism structure and the light-emitting surface of the prism sheet, and an included angle β between the second side surface of each micro triangular prism structure and the light-emitting surface of the prism sheet satisfy the following formula: β > (180 ° - α)/2.
Preferably, the distance between every two adjacent miniature triangular prism structures is 0.01-0.1 mm.
Preferably, the distance between the lateral edge between the first side surface and the second side surface of each micro triangular prism structure and the light incident surface of the prism sheet is 0.01-0.1 mm.
Preferably, the plurality of miniature triangular prism structures and the prism sheet are of an integrated structure.
Preferably, each of the micro triangular prism structures extends in the same direction as the light bar.
A display device comprises the lateral entrance type backlight module in any technical scheme.
Drawings
Fig. 1 is a schematic cross-sectional structure view of a prism sheet in a side-entry backlight module according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure view of a side-entry backlight module according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a side-entry backlight module according to another embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a side-entry backlight module according to another embodiment of the present invention;
fig. 5 is a schematic diagram of the emergent light intensity distribution of the light guide plate of the side-in backlight module and the light intensity distribution of the light emitted from the light guide plate after passing through the prism sheet in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Please refer to fig. 1 to 5.
As shown in fig. 1-4, an embodiment of the present invention provides a side-in type backlight module, which includes a light guide plate 1, a light bar 2 disposed along a light incident side of the light guide plate 1, and a prism sheet 3 disposed on a light emergent side of the light guide plate 1; wherein,
the prism sheet 3 includes a light incident surface 31 and a light emitting surface 32 which are oppositely arranged, the light incident surface 31 is arranged facing the light guide plate 1, and a plurality of micro triangular prism structures are arrayed on the light incident surface 31, the bottom surface of each micro triangular prism structure is an acute triangle, and each micro triangular prism structure includes a first side surface 41 arranged toward one side where the light bar 2 is located and a second side surface 42 arranged toward the side opposite to the side where the light bar 2 is located.
In the side-in backlight module, light emitted by the light bar 2 can be finally emitted after sequentially passing through the light guide plate 1 and the prism sheet 3, in the process, light emitted from the light guide plate 1 enters the prism sheet 3 from the micro triangular prism structure arranged on one side of the light incident surface 31 of the prism sheet 3, because the bottom surface of the micro triangular prism structure is in an acute triangle shape, the first side surface 41 of the micro triangular prism structure is arranged towards one side where the light bar 2 is positioned, and the second side surface 42 of the micro triangular prism structure is arranged towards the side opposite to the side where the light bar 2 is positioned, most of the light emitted from the light guide plate 1 enters the interior of the micro triangular prism structure from the first side surface 41 of the micro triangular prism structure, then is totally reflected on the second side surface 42 of the micro triangular prism structure, and finally is emitted from the light emitting surface 32 of the prism sheet 3, most of the emitted light, And the light-emitting angle is closer to the normal o direction of the light-emitting surface relative to the light-emitting angle of the light guide plate 1; therefore, the final emergent ray of the backlight module has a narrow visual angle, and the peep-proof effect can be realized; compared with the backlight module structure in the prior art, the structure of the backlight module is only added with the prism sheet 3 structure, and simultaneously, optical film structures such as a diffusion sheet and the like in the backlight module in the prior art are omitted, so the structure is simple.
In summary, the display device using the lateral backlight module has the peep-proof function and a simpler structure.
As shown in fig. 1 to 4, in a specific embodiment, each of the micro triangular prism structures extends in the same direction as the light bar 2. Preferably, a plurality of miniature triangular prism structures are arranged in proper order from the side where lamp strip 2 is located to the side that sets up with lamp strip 2 place one side relatively.
As shown in fig. 1 to 4, based on the above embodiments, in a specific embodiment of the prism sheet 3, an included angle α between the first side surface 41 of each micro triangular prism structure and the light emitting surface 32 of the prism sheet 3 is 10 to 85 degrees, and an included angle β between the second side surface 42 of each micro triangular prism structure and the light emitting surface 32 of the prism sheet 3 is 10 to 85 degrees.
On the basis of the above embodiment, a specific embodiment of the arrangement of the included angle α between the first side surface 41 of each micro triangular prism structure and the light emitting surface 32 of the prism sheet 3 and the included angle β between the second side surface 42 of each micro triangular prism structure and the light emitting surface 32 of the prism sheet 3 in the prism sheet may include the following three implementation manners:
in the first mode, the included angle α and the included angle β satisfy the formula β (180 ° - α)/2.
As shown in fig. 2, when the included angle α and the included angle β in the micro triangular prism structure satisfy the formula, the prism sheet 3 can make most of the light emitted finally approach the normal o direction of the light emitting surface 32, that is, the prism sheet 3 can make the viewing angle of the light emitted from the lateral backlight module of the present application be in the vicinity of the range perpendicular to the light emitting surface.
In a second mode, the included angle α and the included angle β satisfy the formula β > (180 ° - α)/2.
As shown in fig. 3, when the included angle α and the included angle β in the micro triangular prism structure satisfy the formula, the prism sheet 3 can incline most of the light emitted from the micro triangular prism structure toward one side of the light bar 2, that is, the prism sheet 3 can incline the angle of view of the light emitted from the lateral backlight module toward one side of the light bar 2.
In a third mode, the included angle alpha and the included angle beta satisfy the formula beta less than (180-alpha)/2.
As shown in fig. 4, when the included angle α and the included angle β in the micro triangular prism structure satisfy the formula, the prism sheet 3 can incline most of the finally emitted light rays toward the direction opposite to the direction of the side where the light bar 2 is located, that is, the prism sheet 3 can incline the viewing angle of the emitted light rays toward the direction opposite to the direction of the side where the light bar 2 is located.
Fig. 5 is a schematic diagram showing the emergent light intensity distribution of the light guide plate 1 of the lateral backlight module according to the simulation result and the light intensity distribution of the light emitted from the light guide plate 1 after passing through the prism sheet 3 according to the above embodiment of the present invention; wherein the abscissa is the angle between the outgoing ray and the x-direction shown in fig. 2-4, and the ordinate is the brightness of the outgoing ray. Fig. 5 shows the light intensity distribution curves of the prism sheet 3 in the above three embodiments (the first, second, and third embodiments), and the relationship between the shape arrangement of the micro triangular prism structures in the prism sheet 3 and the direction of the emergent light of the final prism sheet 3 can be obtained more intuitively through the light intensity distribution curves of the above three embodiments; moreover, as can be seen from fig. 5, the prism sheet 3 can make the light emitted from the light guide plate 3 approach to the direction perpendicular to the x direction (i.e. the normal o direction of the light emitting surface 32 of the prism sheet 3), and the light emitted from the prism sheet 3 is concentrated, i.e. the light emitting viewing angle of the lateral backlight module in the embodiment of the present invention is small.
As shown in fig. 1, in addition to the above embodiments, in a specific embodiment, in the prism sheet 3, the distance d between every two adjacent micro triangular prism structures may be 0.01 to 0.1 mm.
Further, a distance h between the side edge 40 between the first side surface 41 and the second side surface 42 of each micro triangular prism structure and the light incident surface 31 of the prism sheet 3 (i.e., a height of the bottom triangle of the micro triangular prism structure) may be 0.01 to 0.1 mm.
As shown in fig. 1 to 4, based on the above embodiments, in a preferred embodiment, the plurality of micro triangular prism structures and the prism sheet 3 may be an integral structure, so that the loss of light energy in the prism sheet 3 can be reduced. Specifically, a plurality of patterns of the micro triangular prism structure may be manufactured on a plane of a mold by an injection molding method, and then the patterns on the mold are transferred to a plastic plate to form the micro triangular prism structure patterns on the surface of the plastic plate, thereby obtaining the prism sheet 3 structure; alternatively, a mold having a plurality of micro triangular prism structure patterns may be heated to a certain temperature, and then a plastic plate or a plastic film may be pressed against the mold, thereby forming a plurality of micro triangular prism structure patterns on the plane of the plastic plate or the plastic film to obtain the prism sheet 3 structure.
Certainly, the plurality of miniature triangular prism structures and the prism sheet 3 may also be split structures, and at this time, the miniature triangular prism structures may be formed by a photolithography method; specifically, firstly, uniformly coating ultraviolet curing glue (UV glue) on a plastic film (such as a PET film), rolling a roller template provided with a plurality of miniature triangular prism structure patterns on the UV glue coating to transfer the patterns on the roller onto the UV glue coating, and finally irradiating and curing the UV glue coating by UV light to form a plurality of miniature triangular prism structures; wherein the thickness of the plastic film can be 0.1-1 mm, and the thickness of the UV adhesive coating can be 0.01-0.1 mm;
The embodiment of the utility model provides a still provide a display device, this display device includes the side income formula backlight unit of any above-mentioned embodiment. Because the lateral backlight module has simple structure and small emergent ray visual angle, the display device has simple structure and better peep-proof effect.
It will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A side-in type backlight module is characterized by comprising a light guide plate, a light bar arranged along the light inlet side of the light guide plate, and a prism sheet positioned on one side of the light outlet side of the light guide plate; wherein,
the prism piece includes relative income plain noodles and the play plain noodles that sets up, the income plain noodles towards the light guide plate sets up, just a plurality of miniature triangular prism structures of arranging in array on the income plain noodles, each the bottom surface of miniature triangular prism structure is acute triangle, and each miniature triangular prism structure includes the orientation the first side that one side that the lamp strip place set up and the orientation and the second side that one side opposite that this lamp strip place set up.
2. The edge-type backlight module of claim 1, wherein the prism sheet has an angle α between the first side surface of each micro triangular prism structure and the light-emitting surface of the prism sheet ranging from 10 degrees to 85 degrees, and an angle β between the second side surface of each micro triangular prism structure and the light-emitting surface of the prism sheet ranging from 10 degrees to 85 degrees.
3. The edge-type backlight module of claim 2, wherein the prism sheet includes an angle α between the first side of each micro triangular prism structure and the light-emitting surface of the prism sheet and an angle β between the second side of each micro triangular prism structure and the light-emitting surface of the prism sheet, which satisfy the following formula:
β＝(180°-α)/2。
4. The edge-type backlight module of claim 2, wherein the prism sheet includes an angle α between the first side of each micro triangular prism structure and the light-emitting surface of the prism sheet and an angle β between the second side of each micro triangular prism structure and the light-emitting surface of the prism sheet, which satisfy the following formula:
β＜(180°-α)/2。
5. the edge-type backlight module of claim 2, wherein the angle α between the first side of each micro triangular prism structure and the light-emitting surface of the prism sheet and the angle β between the second side of each micro triangular prism structure and the light-emitting surface of the prism sheet satisfy the following formula:
β＞(180°-α)/2。
6. the lateral backlight module of any one of claims 1 to 5, wherein the distance between every two adjacent micro triangular prism structures is 0.01 to 0.1 mm.
7. The edge-type backlight module of claim 6, wherein a distance between an edge between the first side surface and the second side surface of each of the micro triangular prism structures and the light incident surface of the prism sheet is 0.01-0.1 mm.
8. The edge-type backlight module of any one of claims 1 to 5, wherein the plurality of micro triangular prism structures and the prism sheet are an integral structure.
9. The edge-type backlight module of any one of claims 1 to 5, wherein the extending direction of each of the micro triangular prism structures is the same as the extending direction of the light bar.
10. A display device comprising the lateral backlight module of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620537146.4U CN205665498U (en) | 2016-06-03 | 2016-06-03 | Laterally -incoming -type backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620537146.4U CN205665498U (en) | 2016-06-03 | 2016-06-03 | Laterally -incoming -type backlight module and display device |
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| Publication Number | Publication Date |
|---|---|
| CN205665498U true CN205665498U (en) | 2016-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620537146.4U Active CN205665498U (en) | 2016-06-03 | 2016-06-03 | Laterally -incoming -type backlight module and display device |
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| CN (1) | CN205665498U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515439A (en) * | 2017-09-28 | 2017-12-26 | 京东方科技集团股份有限公司 | Leaded light component, backlight and display device |
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2016
- 2016-06-03 CN CN201620537146.4U patent/CN205665498U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515439A (en) * | 2017-09-28 | 2017-12-26 | 京东方科技集团股份有限公司 | Leaded light component, backlight and display device |
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