CN212989704U - Polarizing light guide plate and blackboard lamp - Google Patents
Polarizing light guide plate and blackboard lamp Download PDFInfo
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- CN212989704U CN212989704U CN202022104087.0U CN202022104087U CN212989704U CN 212989704 U CN212989704 U CN 212989704U CN 202022104087 U CN202022104087 U CN 202022104087U CN 212989704 U CN212989704 U CN 212989704U
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Abstract
The utility model discloses a polarisation light guide plate, including the main plain noodles, assist play plain noodles and go into the plain noodles, the main plain noodles sets up with assisting the relative parallel arrangement of play plain noodles, go into the plain noodles and set up between the main plain noodles and assist the plain noodles, and it intersects with the main plain noodles and assist the plain noodles perpendicular respectively to go out the plain noodles, be provided with the microstructure on the main plain noodles and/or the assistance plain noodles, the microstructure includes a plurality of archs or recesses that are parallel to each other, during the use, go into the plain noodles and arrange up, the light that the light source sent gets into the reflection of emergence in the polarisation light guide plate from the income plain noodles of top, meet main plain noodles and/or assist behind.
Description
Technical Field
The utility model belongs to illuminator design field especially relates to a polarisation light guide plate and blackboard lamp.
Background
The light guide plate (light guide plate) is made of optical acrylic/PC plate, and then high-tech material with high refractive index and no light absorption is used to print light guide points on the bottom surface of the optical acrylic plate by laser engraving, V-shaped cross grid engraving and UV screen printing technology. The optical-grade acrylic sheet is used for absorbing the light emitted from the lamp to stay on the surface of the optical-grade acrylic sheet, when the light irradiates each light guide point, the reflected light can be diffused towards each angle, and then the reflected light is damaged and is emitted from the front surface of the light guide plate. The light guide plate can uniformly emit light through various light guide points with different densities and sizes. The reflecting sheet is used for reflecting the light exposed from the bottom surface back to the light guide plate so as to improve the use efficiency of the light; under the condition of equal area brightness, the light-emitting efficiency is high, the power consumption is low, and the single-side microstructure array light guide plate generally adopts an extrusion molding manufacturing process.
The existing light guide plate is limited in polarization angle and low in effective light flux utilization rate, and existing research and development personnel realize polarization by arranging convex points or concave points with uneven sizes on the light guide plate, but the processing difficulty is high, and the mass production is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a polarisation light guide plate and blackboard lamp can realize the big angle polarisation, and workable, realizes the volume production.
In order to solve the above problem, the technical scheme of the utility model is that:
a polarized light guide plate comprises a main light emitting surface, an auxiliary light emitting surface and a light incident surface;
the main light emitting surface and the auxiliary light emitting surface are arranged in parallel relatively, and the light incident surface is arranged between the main light emitting surface and the auxiliary light emitting surface and is vertically intersected with the main light emitting surface and the auxiliary light emitting surface respectively;
the main light emitting surface and/or the auxiliary light emitting surface are/is provided with a microstructure, and the microstructure comprises a plurality of mutually parallel bulges or grooves;
when the polarized light guide plate is used, the light incident surface is arranged upwards, light rays emitted by the light source enter the polarized light guide plate from the light incident surface above the polarized light guide plate to be reflected, and the emergent angle of emergent light rays is changed after the light rays encounter the microstructures on the main light emergent surface and/or the auxiliary light emergent surface.
Preferably, the groove is a V-shaped groove or an arc-shaped groove, and the protrusion is an inverted V-shaped protrusion or an arc-shaped protrusion.
Preferably, the slopes of the microstructures on the main light emitting surface and/or the auxiliary light emitting surface are consistent.
Preferably, the main light emitting surface is provided with a plurality of V-shaped grooves parallel to each other, the auxiliary light emitting surface is provided with a plurality of arc-shaped protrusions parallel to each other, and the V-shaped grooves are perpendicular to the arc-shaped protrusions.
Preferably, the opening width range of the V-shaped groove is 0.01-0.15 mm, and the ratio range of the depth of the V-shaped groove to the opening width is 1: 1-1: 4.
preferably, the width of the circular arc-shaped protrusion is 0.01-0.15 mm, and the ratio of the height to the width of the circular arc-shaped protrusion is 1: 1-1: 4.
based on the same inventive concept, the invention also provides a blackboard lamp which comprises the polarized light guide plate, wherein the main light-emitting surface is arranged in parallel relative to the blackboard, so that most of light rays irradiate on the blackboard.
The utility model discloses owing to adopt above technical scheme, make it compare with prior art and have following advantage and positive effect:
1) the utility model provides a polarized light guide plate, which comprises a main light-emitting surface, an auxiliary light-emitting surface and a light-in surface, wherein the main light-emitting surface and the auxiliary light-emitting surface are arranged in parallel relatively, the light-in surface is arranged between the main light-emitting surface and the auxiliary light-emitting surface and is vertically crossed with the main light-emitting surface and the auxiliary light-emitting surface respectively, microstructures are arranged on the main light-emitting surface and/or the auxiliary light-emitting surface, each microstructure comprises a plurality of mutually parallel bulges or grooves, when in use, the light-in surface is arranged upwards, light rays emitted by a light source enter the polarized light guide plate from the light-in surface above to be reflected, and after encountering the microstructures on the,
2) the utility model provides a pair of polarisation light guide plate, it is even for the size that the micro-structure on the play plain noodles and/or the supplementary plain noodles of giving first place to, and the unanimous arch of shape or recess, workable, easily carry out the volume and produce.
3) The utility model provides a blackboard lamp, the relative blackboard parallel arrangement of the main play plain noodles in its polarisation light guide plate, the micro-structure in the polarisation light guide plate can increase the polarisation angle of emergent ray to make most emergent ray shine to the blackboard on, improve the degree of consistency of blackboard illuminance, improve effective light flux utilization rate.
Drawings
FIG. 1 is a graph of slope K of a microstructure as a function of the exit angle of an exiting ray;
fig. 2 is an optical schematic diagram of a polarized light guide plate according to a first embodiment of the present invention;
fig. 3 is an optical schematic diagram of a polarized light guide plate according to a second embodiment of the present invention;
fig. 4 is a three-dimensional view of a polarized light guide plate according to a third embodiment of the present invention;
fig. 5 is a top view of a polarized light guide plate according to a third embodiment of the present invention;
fig. 6 is a front view of a polarized light guide plate according to a third embodiment of the present invention;
fig. 7 is a left side view of a polarized light guide plate according to a third embodiment of the present invention;
fig. 8 is a bottom view of a polarized light guide plate according to a third embodiment of the present invention;
fig. 9 is an exploded view of a blackboard lamp according to the fourth embodiment of the present invention;
fig. 10 is a diagram of a positional relationship between a blackboard lamp and a blackboard provided in the fourth embodiment of the present invention;
FIG. 11 is a diagram showing a positional relationship between a blackboard lamp and a blackboard in the prior art;
fig. 12 is a schematic view of a light distribution curve of a blackboard lamp according to a fourth embodiment of the present invention;
fig. 13 is a schematic diagram of a light distribution curve of a blackboard lamp in the prior art.
Description of reference numerals:
1: a blackboard lamp; 11: a boom assembly; 12: a housing assembly; 13: PCB-LED; 14: a polarized light guide plate; 141: a microstructure; 15: a back plate assembly; 16: a rear cover assembly; 2: a blackboard; 3: and (4) the ground.
Detailed Description
The following provides a detailed description of a polarized light guide plate and a blackboard lamp according to the present invention with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims.
In order to solve the problem of low utilization rate of effective light flux in the existing polarized light guide plate, the utility model provides a polarized light guide plate, which comprises a main light emitting surface, an auxiliary light emitting surface and a light incident surface;
the main light-emitting surface and the auxiliary light-emitting surface are arranged in parallel relatively, and the light-in surface is arranged between the main light-emitting surface and the auxiliary light-emitting surface and is intersected with the main light-emitting surface and the auxiliary light-emitting surface in a vertical plane respectively;
the main light emitting surface and/or the auxiliary light emitting surface are/is provided with a microstructure which comprises a plurality of mutually parallel bulges or grooves;
when the light guide plate is used, the light incident surface is arranged upwards, light rays emitted by the light source enter the polarized light guide plate from the light incident surface above to be reflected, the emergent angle of emergent light rays is changed after the light rays encounter the microstructures on the main light emergent surface and/or the auxiliary light emergent surface, and a functional relation graph of the slope of the protrusion or the groove and the emergent angle of the emergent light rays is shown in fig. 1, wherein the emergent angle is increased along with the increase of the slope; the utility model discloses in, can select the slope of the arch or the recess on the main plain noodles and/or the supplementary plain noodles according to actual conditions, the slope of arch or recess on the coplanar can be inconsistent promptly, nevertheless the utility model discloses in, also can set up the micro-structure on the main plain noodles and/or the supplementary plain noodles into the size evenly, the unanimous arch of shape or recess, workable, easily carry out the volume and produce.
Six examples are specifically described below.
Example one
Referring to fig. 2, the present embodiment provides a polarized light guide plate, which includes a main light emitting surface, an auxiliary light emitting surface and a light incident surface, where the main light emitting surface and the auxiliary light emitting surface are arranged in parallel, as shown in fig. 2, the upper surface is the auxiliary light emitting surface, the lower surface is the main light emitting surface, the light incident surface is arranged between the main light emitting surface and the auxiliary light emitting surface, and is respectively intersected with the main light emitting surface and the auxiliary light emitting surface in a vertical plane, as shown in fig. 2, and the left;
the auxiliary light emitting surface is provided with a microstructure 141, the microstructure 141 includes a plurality of V-shaped grooves parallel to each other, in this embodiment, the microstructure 141 may also be configured as a groove of other shapes, such as an arc-shaped groove, which is not limited herein, in this embodiment, the opening width of the V-shaped groove is 0.01-0.15 mm, and the ratio of the depth of the V-shaped groove to the opening width is 1: 1-1: 4;
when the polarized light guide plate deflects, the light incident surface is arranged upwards, namely, the light source is placed by rotating ninety degrees clockwise in the figure 2, light emitted by the light source enters the polarized light guide plate from the light incident surface above to be reflected, the light is reflected after encountering a V-shaped groove on the auxiliary light emergent surface, the emergent angle of emergent light is changed, and the emergent light is emitted from the main light emergent surface and irradiates on an irradiated object.
When light passes through the inclined plane of the microstructure, the light is refracted so as to deflect the light, and the normal perpendicular to the light-emitting surface is 0 degree as a reference, the polarization angle of the polarization light guide plate provided by the embodiment is about 70 degrees, and the polarization angle in the prior art is about 48 degrees.
Example two
Referring to fig. 3, the present embodiment provides a polarized light guide plate, which includes a main light emitting surface, an auxiliary light emitting surface and a light incident surface, where the main light emitting surface and the auxiliary light emitting surface are arranged in parallel, as shown in fig. 3, the upper surface is the auxiliary light emitting surface, the lower surface is the main light emitting surface, the light incident surface is arranged between the main light emitting surface and the auxiliary light emitting surface, and is respectively intersected with the main light emitting surface and the auxiliary light emitting surface in a vertical plane, as shown in fig. 3, and the left;
the microstructure 141 is arranged on the main light emitting surface, the microstructure 141 comprises a plurality of parallel circular arc-shaped protrusions, in this embodiment, the microstructure 141 can also be arranged as protrusions with other shapes, such as V-shaped protrusions, which are not limited again, in this embodiment, the width range of the bottom edge of the circular arc-shaped protrusion is 0.01-0.15 mm, and the ratio range of the height of the circular arc-shaped protrusion to the width of the bottom edge is 1: 1-1: 4;
when the polarized light guide plate deflects, the light incident surface is arranged upwards, that is, the light source is placed by rotating ninety degrees clockwise in fig. 3, light emitted by the light source enters the polarized light guide plate from the light incident surface above and is reflected on the auxiliary light emergent surface, the emergent angle of emergent light is changed after the light meets the circular arc-shaped bulge on the main light emergent surface, and the emergent light is emitted from the main light emergent surface and irradiates on an irradiated object.
When light passes through the inclined plane of the microstructure, the light is refracted so as to deflect the light, and the normal perpendicular to the light-emitting surface is 0 degree as a reference, the polarization angle of the polarization light guide plate provided by the embodiment is about 70 degrees, and the polarization angle in the prior art is about 48 degrees.
EXAMPLE III
Referring to fig. 4 and 8, the present embodiment provides a polarized light guide plate, which includes a main light emitting surface, an auxiliary light emitting surface and a light incident surface, where the main light emitting surface and the auxiliary light emitting surface are arranged in parallel, as shown in fig. 4, the upper surface is the auxiliary light emitting surface, the lower surface is the main light emitting surface, the light incident surface is arranged between the main light emitting surface and the auxiliary light emitting surface, and intersects with the main light emitting surface and the auxiliary light emitting surface in a vertical plane, respectively, as shown in fig. 4, the left side surface;
in this embodiment, all be provided with microstructure 141 on the main plain noodles and the supplementary plain noodles, be provided with a plurality of V-arrangement recesses that are parallel to each other on the main plain noodles, be provided with a plurality of convex archs that are parallel to each other on the supplementary plain noodles, and V-arrangement recess and convex archs mutually perpendicular, in this embodiment, the opening width scope of V-arrangement recess is 0.01 ~ 0.15mm, and the degree of depth of V-arrangement recess is 1 with the ratio scope of opening width: 1-1: 4, the base width range of the circular arc-shaped bulge is 0.01-0.15 mm, and the ratio range of the height of the circular arc-shaped bulge to the base width is 1: 1-1: 4;
when the polarized light guide plate deflects, the light incident surface is arranged upwards, light rays emitted by the light source enter the polarized light guide plate from the light incident surface above, are reflected by the V-shaped grooves on the auxiliary light emergent surface, meet the circular arc-shaped protrusions on the main light emergent surface, change the emergent angle of emergent light rays, and emit the emergent light rays through the main light emergent surface to irradiate on an irradiated object.
When light passes through the inclined plane of the microstructure, the light is refracted so as to deflect the light, and the normal perpendicular to the light-emitting surface is 0 degree as a reference, the polarization angle of the polarization light guide plate provided by the embodiment is about 70 degrees, and the polarization angle in the prior art is about 48 degrees.
Example four
Based on the same inventive concept, referring to fig. 9 to 13, the present embodiment further provides a blackboard lamp including the polarized light guide plate according to any one of the first to third embodiments;
referring to fig. 9, a blackboard lamp 1 provided in this embodiment sequentially includes a suspension rod assembly 11, a housing assembly 12, a PCB-LED13, a polarized light guide plate 14, a backboard assembly 15, and a rear cover assembly 16, unlike the prior art, referring to fig. 11, a blackboard lamp 1 is disposed perpendicular to a blackboard 2, in this embodiment, referring to fig. 10, a main light emitting surface of the blackboard lamp 1 is disposed parallel to the blackboard 2, referring to fig. 10, a light incident surface is disposed upward, an LED light bar serving as a light source is disposed above the light incident surface, light emitted by the LED enters the polarized light guide plate 14 through the light incident surface, since microstructures capable of changing a polarization angle are disposed on the main light emitting surface and/or the auxiliary light emitting surface of the polarized light guide plate, a detailed principle of which is described in the above embodiment, referring to fig. 12, the blackboard lamp provided in this embodiment emits about 80% of light to the blackboard, 20% shine subaerially, compare blackboard lamp among the prior art, refer to fig. 13 and show, its emergent light is about 60% shine to the blackboard on, 40% shines subaerially, so the utility model provides a blackboard lamp's effective luminous flux utilization ratio is higher, and blackboard illuminance degree of consistency is better, so blackboard lamp 1 and 2 parallel arrangement of blackboard can increase the play plain noodles, increase and be shone the thing area to reach good degree of consistency. The light-emitting surface of the prior scheme is approximately vertical to the illuminated object, and the proportion of the area increase of the illuminated object is limited while the light-emitting surface is increased.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, the changes are still within the scope of the present invention if they fall within the scope of the claims and their equivalents.
Claims (7)
1. A polarized light guide plate is characterized by comprising a main light emitting surface, an auxiliary light emitting surface and a light incident surface;
the main light emitting surface and the auxiliary light emitting surface are arranged in parallel relatively, and the light incident surface is arranged between the main light emitting surface and the auxiliary light emitting surface and is vertically intersected with the main light emitting surface and the auxiliary light emitting surface respectively;
the main light emitting surface and/or the auxiliary light emitting surface are/is provided with a microstructure, and the microstructure comprises a plurality of mutually parallel bulges or grooves;
when the polarized light guide plate is used, the light incident surface is arranged upwards, light rays emitted by the light source enter the polarized light guide plate from the light incident surface above the polarized light guide plate to be reflected, and the emergent angle of emergent light rays is changed after the light rays encounter the microstructures on the main light emergent surface and/or the auxiliary light emergent surface.
2. The light guide plate according to claim 1, wherein the groove is a V-shaped groove or a circular arc groove, and the protrusion is an inverted V-shaped protrusion or a circular arc protrusion.
3. The light guide plate according to claim 1, wherein the slopes of the microstructures on the main light emitting surface and/or the auxiliary light emitting surface are uniform.
4. The polarized light guide plate of claim 3, wherein the main light-emitting surface has a plurality of parallel V-shaped grooves, the auxiliary light-emitting surface has a plurality of parallel circular arc-shaped protrusions, and the V-shaped grooves are perpendicular to the circular arc-shaped protrusions.
5. The light guide plate according to claim 4, wherein the V-shaped grooves have an opening width in a range of 0.01 to 0.15mm, and a ratio of a depth of the V-shaped grooves to the opening width is in a range of 1: 1-1: 4.
6. the polarized light guide plate of claim 4, wherein the width of the circular arc protrusion is 0.01-0.15 mm, and the ratio of the height to the width of the circular arc protrusion is in the range of 1: 1-1: 4.
7. a blackboard lamp, characterized in that, comprising the polarized light guide plate of any one of claims 1 to 6, the main light-emitting surface is arranged in parallel with the blackboard, so that most of the light irradiates the blackboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022104087.0U CN212989704U (en) | 2020-09-23 | 2020-09-23 | Polarizing light guide plate and blackboard lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022104087.0U CN212989704U (en) | 2020-09-23 | 2020-09-23 | Polarizing light guide plate and blackboard lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212989704U true CN212989704U (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022104087.0U Active CN212989704U (en) | 2020-09-23 | 2020-09-23 | Polarizing light guide plate and blackboard lamp |
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|---|---|
| CN (1) | CN212989704U (en) |
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- 2020-09-23 CN CN202022104087.0U patent/CN212989704U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230921 Address after: 314001 No. 790 Huayan Road, Jiaxing Economic and Technological Development Zone, Zhejiang Province Patentee after: Zhejiang Caicheng Technology Co.,Ltd. Address before: 201613 2nd floor, building 6, No.68 Zhongchuang Road, Songjiang District, Shanghai Patentee before: SHANGHAI CATCHING NEW MATERIAL TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |