CN208255460U - Circular light guide plate - Google Patents
Circular light guide plate Download PDFInfo
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- CN208255460U CN208255460U CN201820723195.6U CN201820723195U CN208255460U CN 208255460 U CN208255460 U CN 208255460U CN 201820723195 U CN201820723195 U CN 201820723195U CN 208255460 U CN208255460 U CN 208255460U
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- guiding surface
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Abstract
The utility model provides a kind of circular light guide plate, including transparent plate ontology, and the plate-like body is included in the first light guiding surface and the second light guiding surface on axial sides direction, and in the light source incidence surface on circumference, light source is arranged in the periphery of circular light guide plate；Multiple annular reflection areas radially successively to arrange are provided on second light guiding surface, the annular reflection area includes the conducting surface for forming the export face of angle between light source incidence surface and the first light guiding surface respectively, connecting with export face.After the reflection that light beam passes through conducting surface, reflection is conducted between conducting surface and the first light guiding surface, reflection path shortens, transmission path of the light beam inside light guide plate shortens, light is reduced in the loss of light guide plate internal transmission, the utilization rate of light is improved, is finally exported by export in face of light, and pass through the export ratio of multiple export face co- controlling light.
Description
Technical field
The utility model relates to photocon field, in particular to a kind of circular light guide plate.
Background technique
Light guide plate is a kind of important smooth transmitting medium for converting point light source to planar light source.
It is totally different, (or recessed micro- apart from different, large number of convex netted particle that existing light guide plate is designed to size more
Hole), it will play scattering and refraction action to light, along plate conduction beam divergence, be refracted to planar surface, to make
One piece optical light guide plate issues soft, uniform planar light.
The shape style of light guide plate has very much, including whole is in rectangular surfaces, and the entirety also having is corresponding guide-lighting in disc
The shape of plate is different, and corresponding structural principle also can be variant, and notification number is that CN204227325U discloses a kind of New LED circle
Shape light guide plate comprising a transparent or translucent plate-like body, a side end face of the plate-like body is at least provided with a LED
Lamp group, the plate-like body surface or forms concave-convex V type slot, the concave-convex V type in stacking on the optical sheet in plate-like body
Slot is round line, and around central point, transmitting light source reduces bright loss.
The light guide plate is plate-like body parallel up and down, and LED light group is set to the edge of plate-like body.As shown in Figure 1, working as side
After the light beam of the LED light group on side is injected, the area that the directional light of light beam can intersect with the concave-convex V type slot in plate-like body is small,
The export efficiency of light source is extremely low, and especially under the circular light guide plate under small size, the disadvantage is particularly evident.
Utility model content
The purpose of the utility model is to provide a kind of circular light guide plate, with light-output efficiency higher, material cost compared with
Low advantage.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of circular light guide plate, including transparent plate ontology, characterized in that the plate-like body is included in axial sides side
Upward the first light guiding surface and the second light guiding surface, in the light source incidence surface of periphery, light source is arranged in circular light guide plate
Periphery；
Multiple annular reflection areas radially successively to arrange, the annular reflection area packet are provided on second light guiding surface
The export face for forming angle between light source incidence surface and the first light guiding surface respectively is included, which is in respect to the first light guiding surface
It is obliquely installed, and the light beam of light source is injected by light source incidence surface and exported through the refraction of export face or reflection, multiple export faces are common
Control the export ratio for the light that light source incidence surface is injected；
Annular reflection area further includes the conducting surface to connect with export face, conducting surface nearly second light guiding surface side, and each
Axial distance between the conducting surface and the first light guiding surface gradually successively decreases along light source incidence surface to center of circle direction, the conducting surface
The folder that the angle that the tangent line of any point and the first light guiding surface are formed is less than the tangent line of export face any point and the first light guiding surface is formed
Angle, the light beam of light source conduct reflection along light source incidence surface to center of circle direction between conducting surface and the first light guiding surface, wherein warp
The light beam and the first light guiding surface formation α angle of conducting surface reflection, the α angle is with multiple reflections of the light on conducting surface and gradually
Increase.
Further setting: the export face quantity in the annular reflection area is two, the inclination in two adjacent export faces
Connection is realized by being provided with joint face in contrary and two export face teletransmission guide face sides end.
Further setting: the radical length of the conducting surface gradually successively decreases along light source incidence surface to center of circle direction.
Further setting: the distance between the joint face in each annular reflection area and export face highest point are along light source
Incidence surface to center of circle direction is gradually incremented by.
Further setting: the joint face is cambered surface or plane.
Further setting: arc transition is set as between the joint face and export face.
Further setting: the angle that the tangent line of the conducting surface any point and the first light guiding surface are formed is 0~15 °, described
The angle that the tangent line of export face any point and the first light guiding surface are formed is 20~60 °.
Further setting: the conducting surface be continuously formed on the second light guiding surface curved surface on same path or spherical surface or
Cascaded surface.
Further setting: the plate-like body is roll-forming or compression molding or injection molding.
Further setting: the annular reflection area of identical rule is arranged on first light guiding surface.
The utility model has the following beneficial effects:
1, point light source is arranged in the outer ring position of circular light guide plate, light source enters inside plate-like body from outer ring, light
It is reflected between the first light guiding surface and the second light guiding surface, it is anti-that multiple annulars radially successively arranged is provided on the second light guiding surface
Area is penetrated, forms that light is close and light is thin between the material and air of light guide plate, meet certain condition in incident angle lower can bring respectively
Two kinds of situations of refraction and total reflection, when the incidence angle of incident ray meets the case where being totally reflected, light reflects again from export face
To the first light guiding surface, continue to transmit light from periphery toward the center of circle from the first light guiding surface, it is on the contrary then reflect the second light guiding surface；
Under same annular reflection plot structure, light guide plate is thicker, and export efficiency is lower, conversely, more Bao Yuegao.So by the plate
The thickness that ontology is disposed proximate at light source incidence surface is big, and the center point thinner thickness.In addition, in the identical feelings of light guide plate
The use that material can be reduced under condition, even more significantly reduces cost when quantity is big.
2, for the soft degree of the light of further gentle entire light guide plate, the arrangement in the export face at close to sources is close
Degree is negligent of at distance light source, and the distance between the joint face in each annular reflection area and export face highest point are along the center of circle to outer circle
The direction in face successively increases.By the light beam at distance light end more efficient utilization and export, light export is more efficient.
Detailed description of the invention
Fig. 1 is the schematic diagram of the circular light guide plate of uniform thickness in the prior art；
Fig. 2 is the amount of light schematic diagram of the circular light guide plate of uniform thickness in the prior art；
Fig. 3 is the schematic diagram of the circular light guide plate of the application；
Fig. 4 is the top view of the circular light guide plate of the application；
Fig. 5 is the detail view in the annular reflection area of the circular light guide plate of the application；
Fig. 6 is the amount of light schematic diagram of the circular light guide plate of the application.
In figure, 1, plate-like body；2, the first light guiding surface；3, the second light guiding surface；4, light source incidence surface；5, annular reflection area；
6, face is exported；7, joint face；8, conducting surface.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Embodiment 1:
A kind of circular light guide plate, as shown in figure 3, include transparent plate-like body 1, plate-like body 1 be roll-forming or
Compression molding or injection molding.The periphery of plate-like body 1 has light source incidence surface 4, and light source is arranged in circular light guide plate
Periphery, to provide light source inside plate-like body 1.
As shown in Figure 3 and Figure 4, it is guide-lighting to be included in the first light guiding surface 2 and second on axial sides direction for plate-like body 1
Face 3 is disposed with multiple annular reflection areas 5 along plate-like body 1 on the second light guiding surface 3 in the radial direction.
It is annular as showing by enlarged drawing Fig. 5 in order to show the structure because annular reflection area 5 is small structure
The size of the schematic diagram of echo area 5, all parts in Fig. 5 is only for reference.
With reference to Fig. 5, each annular reflection area 5 includes two export faces being obliquely installed 6, the inclination in two export faces 6
Contrary, in the ideal situation, two export faces 6 can intersect at a point to form V-structure, can so allow two export
The effect in face 6 is maximum.But because the V-structure that export face 6 is intersected has viscoelasticity in plastic shaping, therefore, each ring
It can also be provided with joint face 7 between two export faces 6 of shape echo area 5, ladder is constituted between joint face 7 and two export faces 6
Shape shape, above-mentioned joint face 7 can be cambered surface and be also possible to plane.
Annular reflection area 5 further includes the conducting surface 8 to connect with export face 6, conducting surface 8 close to 3 side of the second light guiding surface, and
Axial distance between each conducting surface 8 and the first light guiding surface 2 gradually successively decreases along light source incidence surface 4 to center of circle direction, conduction
The angle that the tangent line of 8 any point of face and the first light guiding surface 2 are formed is less than 2 shape of tangent line and the first light guiding surface of 6 any point of export face
At angle.Specifically, the angle that the tangent line of 8 any point of conducting surface and the first light guiding surface 2 are formed is 0~15 °, exports face 6
The angle that the tangent line of any point and the first light guiding surface 2 are formed is 20~60 °.Above-mentioned conducting surface 8 is continuous on the second light guiding surface 3
The curved surface or spherical surface or cascaded surface being formed on same path.
Based on above-mentioned setting, the light light quantity that goes out of circular light guide plate is compared and analyzed, as shown in Fig. 2, Fig. 2 is in Fig. 1
The schematic diagram for going out light light quantity after the arrangement concave-convex V type slot of the circular light guide plate of the prior art, the side entering light of circular light guide plate,
By taking the sectional view in Fig. 2 as an example, entering light on the left of light source, middle part is the amount of light of the center location of circular light guide plate, and right side is light
The distalmost end of source entering light position.Light is after the lateral entering light of light guide plate, and theoretically the light that goes out of every side light source is at center location
Can, the light source being arranged on light guide plate circumference just reaches the whole bright of sufficient circular light guide plate.Due to the lateral penetrability of light, light source
Still there is major part to be perforated through center location after having crossed the center of circle, the reflection path of the light of the part is longer, even, some
Light beam is directly projected from the other end, cannot efficiently use export, the export rate of light is very low.
As shown in fig. 6, the composition of conducting surface 6 so that the second light guiding surface 3 at recess, specifically, circular light guide plate
Outer ring is thicker, and center location is relatively thin.After the reflection for passing through conducting surface 8 in conjunction with Fig. 3, light beam, in conducting surface 8 and the first light guiding surface 2
Between conduct reflection, reflection path shortens, and transmission path of the light beam inside light guide plate shortens, and reduces light inside light guide plate
The loss of transmission improves the utilization rate of light.Again because the reflected beams of conducting surface 8 and the α angle of the first light guiding surface 2 gradually become
Greatly, the more conducively export of light improves the derived proportions of light and improves export efficiency.It is recessed finally, being constituted according to conducting surface 8
Shape, the thinner thickness of center location, the export efficiency of light and the thickness of light guide plate are inversely proportional, and the thickness of center location is thinner, light
It is higher to export efficiency, the export efficiency of the equal light guide plate 50% of thickness is at least promoted to 80% or more.
In addition, the light beam of light source is injected by light source incidence surface 4 through the refraction export of export face 6 or reflection, specifically, ginseng
Fig. 5 is examined, light beam exports after export face 6 reflects, but still has a small amount of light beam to be reflected, and continues to reflect by the first light guiding surface 2, lead
6 pairs of light of appearing export, and pass through the export ratio of multiple 6 co- controlling light of export face.
If export face 6 is made into similar trapezoidal structure with joint face 7, between joint face 7 and the first light guiding surface 2
Then be parallel relation, under this kind of state, when light reflexes on joint face 7 from the first light guiding surface 2, due to joint face 7 with
Angle is not present between first light guiding surface 2, joint face 7 can not play derivative ac-tion to light beam, so in order to mention light
It exports efficiency and also forms arc transition between joint face 7 and two export faces 6 so doing joint face 7 in arc-shaped, it will be micro-
It under the radian of small joint face 7, plays and not planning for light beam is distributed, because increasing the multiple reflections of light beam, more conducively
At beam conduction to the center location of circular light guide plate, moreover, playing even light action.Again because joint face 7 export face 6 having a size of
Micron order, as joint face 7 is not circular arc excessively but intersects connection export face 6, connects dot shape because of material in the wedge angle of intersection
Viscoplasticity at high temperature is difficult to form.
Since the light intensity that close to sources goes out is bigger, and it is then weaker at distance light source, and the radical length of conducting surface 8 is with remote
It is smaller and smaller from point light source.It rephrases the statement, i.e., the arrangement of export face 6 at point light source is negligent of far from point light source.In this way,
It can want high more using the ratio light guide plate identical with thickness in above-mentioned export face 6.Furthermore because export face 6 is arranged in density
Cloth basis, by the light beam at distance light end more efficient utilization and export.
Further, for far from the export face 6 at point light source, the joint face 7 in each of which annular reflection area 5 with
The distance between 6 highest point of export face is gradually incremented by along light source incidence surface 4 to center of circle direction.Such design can guarantee distance light
Joint face 7 and the distance between the first light guiding surface 2 at source is small, further improves export efficiency.More importantly light
The number of reflection and refraction increases, and the utilization rate in export face 6 increases, and improves derived proportions.
Under the structure of the light guide plate of the application, the use of material is not only only reduced, there is great economic benefit, and
And the export of light is more conducive to than traditional light guide plate.
Embodiment 2, difference from Example 1 is, the annular reflection area of identical rule is arranged on the first light guiding surface 2
5。
The above embodiments are only the explanation to the utility model, are not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (10)
1. a kind of circular light guide plate, including transparent plate ontology (1), characterized in that the plate-like body (1) is included in axial two
The first light guiding surface (2) and the second light guiding surface (3) in side direction, in the light source incidence surface (4) of periphery, light source is arranged in
The periphery of circular light guide plate；
Multiple annular reflection areas (5) radially successively to arrange, the annular reflection area are provided on second light guiding surface (3)
It (5) include the export face (6) for forming angle between light source incidence surface (4) and the first light guiding surface (2) respectively, the export face
(6) opposite first light guiding surface (2) are inclined to set, and the light beam of light source is injected by light source incidence surface (4) through export face (6) folding
Penetrate or reflect export, the export ratio for the light that multiple export face (6) co- controlling light source incidence surfaces (4) are injected；
Annular reflection area (5) further includes the conducting surface (8) to connect with export face (6), nearly second light guiding surface (3) one of conducting surface (8)
Side, and the axial distance between each described conducting surface (8) and the first light guiding surface (2) is along light source incidence surface (4) to center of circle side
To gradually successively decreasing, the angle that the tangent line and the first light guiding surface (2) of conducting surface (8) any point are formed is appointed less than export face (6)
The angle that the tangent line of any and the first light guiding surface (2) are formed, the light beam of light source is along light source incidence surface (4) to center of circle direction, Yu Chuan
Reflection is conducted between guide face (8) and the first light guiding surface (2), wherein the light beam and the first light guiding surface (2) reflected through conducting surface (8)
α angle is formed, which is gradually increased with multiple reflections of the light on conducting surface (8).
2. circular light guide plate according to claim 1, it is characterised in that: export face (6) number of the annular reflection area (5)
Amount is two, and the inclined directions of two adjacent export faces (6) is opposite and two export face (6) teletransmission guide faces (8) one
Connection is realized by being provided with joint face (7) in the end of side.
3. circular light guide plate according to claim 2, it is characterised in that: the radical length of the conducting surface (8) is along light source
Gradually successively decrease in incidence surface (4) to center of circle direction.
4. circular light guide plate according to claim 3, it is characterised in that: the connection of each annular reflection area (5)
The distance between face (7) and export face (6) highest point are gradually incremented by along light source incidence surface (4) to center of circle direction.
5. circular light guide plate according to claim 3, it is characterised in that: the joint face (7) is cambered surface or plane.
6. circular light guide plate according to claim 5, it is characterised in that: set between the joint face (7) and export face (6)
It is set to arc transition.
7. circular light guide plate according to claim 1, it is characterised in that: the tangent line of conducting surface (8) any point and
The angle that one light guiding surface (2) is formed is 0~15 °, what the tangent line and the first light guiding surface (2) of export face (6) any point were formed
Angle is 20~60 °.
8. circular light guide plate according to claim 1, it is characterised in that: the conducting surface (8) is on the second light guiding surface (3)
The curved surface or spherical surface or cascaded surface being continuously formed on same path.
9. circular light guide plate according to claim 1, it is characterised in that: the plate-like body (1) be roll-forming or
Compression molding or injection molding.
10. circular light guide plate according to claim 1, it is characterised in that: arrange identical rule on first light guiding surface (2)
The annular reflection area (5) of rule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820723195.6U CN208255460U (en) | 2018-05-15 | 2018-05-15 | Circular light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820723195.6U CN208255460U (en) | 2018-05-15 | 2018-05-15 | Circular light guide plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208255460U true CN208255460U (en) | 2018-12-18 |
Family
ID=66480286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820723195.6U Active CN208255460U (en) | 2018-05-15 | 2018-05-15 | Circular light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208255460U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387970A (en) * | 2018-05-15 | 2018-08-10 | 杭州矽能新材料有限公司 | Circular light guide plate |
-
2018
- 2018-05-15 CN CN201820723195.6U patent/CN208255460U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387970A (en) * | 2018-05-15 | 2018-08-10 | 杭州矽能新材料有限公司 | Circular light guide plate |
| CN108387970B (en) * | 2018-05-15 | 2024-04-05 | 杭州矽能新材料有限公司 | Round light guide plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Circular light guide plate Effective date of registration: 20230718 Granted publication date: 20181218 Pledgee: Zhejiang Lin'an Rural Commercial Bank Co.,Ltd. Pledgor: HANGZHOU XINENG NEW MATERIAL CO.,LTD. Registration number: Y2023330001514 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |