CN210894765U - Backlight module with optical isolation partition - Google Patents
Backlight module with optical isolation partition Download PDFInfo
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- CN210894765U CN210894765U CN201921656126.9U CN201921656126U CN210894765U CN 210894765 U CN210894765 U CN 210894765U CN 201921656126 U CN201921656126 U CN 201921656126U CN 210894765 U CN210894765 U CN 210894765U
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- light guide
- light
- led lamp
- backlight module
- guide members
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Abstract
A backlight module with light isolation partitions comprises a light source component and a light guide plate. The light source assembly comprises a substrate and a plurality of LED lamp holders, the LED lamp holders are arranged on the substrate at intervals, and the LED lamp holders are all positioned on the same side face of the substrate; the light guide plate comprises a bridging seat and a plurality of light guide members, the plurality of light guide members are all arranged on the bridging seat, the plurality of light guide members are all positioned on the same side face of the bridging seat, an air interlayer is arranged between every two adjacent light guide members, and the plurality of LED lamp holders are arranged towards the plurality of light guide members in a one-to-one correspondence manner; the light guide component comprises an incident light part, a light guide part and an emergent light part, wherein the incident light part and the emergent light part are respectively arranged on two adjacent side surfaces of the light guide part, and the incident light part is positioned on one side of the light guide part close to the substrate. The light guide plate is arranged in a partitioning mode according to the number of the LED lamp holders in the light source assembly, and the light isolating structure is arranged between the two partitions, so that the independent control of the brightness of the area of the side-in backlight is achieved, and the high optical isolation degree is achieved at low cost.
Description
Technical Field
The present invention relates to a light guide plate, and more particularly to a backlight module with light-shielding partitions.
Background
The luminance partitioning and independent control of the backlight are the technical bases of the partitioning and scanning3D and the aspects of improving dynamic contrast, saving power consumption and the like. In a conventional side-entry backlight, light is diffused in an LGP (i.e., a light guide plate), which causes uneven brightness of each sub-area, and further affects processing effects of technologies such as luminance, scanning3D, and the like.
In order to avoid the dispersion phenomenon of light in the transmission process of the light guide plate, the LGP with the microstructure is generally adopted, however, the manufacturing cost of the LGP with the microstructure is 25% higher than that of the common LGP, the optical isolation effect among all the subareas is poor, the mass production performance of the LGP with the microstructure is poor, the defective product occurrence rate is high, mass production is difficult to realize, the requirement of the LGP with the microstructure on the use environment is high, and the LGP with the microstructure is easy to bend and deform after moisture absorption, so that the functional defect is caused.
Therefore, how to optimize the structure of the existing light guide plate, so that the light guide plate has higher light-shielding performance and can be produced in batch, and the manufacturing cost of the backlight module is reduced is a problem to be solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point among the prior art, provide a backlight unit who has the light isolation subregion, replace the light isolation effect between each subregion on the microstructure light guide plate improves the light guide plate, and then improve backlight unit's illuminating effect.
The purpose of the utility model is realized through the following technical scheme:
a backlight module having light-isolating partitions includes: a light source assembly and a light guide plate;
the light source assembly comprises a substrate and a plurality of LED lamp holders, the LED lamp holders are arranged on the substrate at intervals, and the LED lamp holders are all positioned on the same side face of the substrate;
the light guide plate comprises a bridging seat and a plurality of light guide members, the plurality of light guide members are all arranged on the bridging seat, the plurality of light guide members are all positioned on the same side face of the bridging seat, an air interlayer is arranged between every two adjacent light guide members, and the plurality of LED lamp holders are arranged towards the plurality of light guide members in a one-to-one correspondence manner;
in one of the light guide members, the light guide member includes an incident portion, a light guide portion, and an emergent portion, the incident portion and the emergent portion are respectively disposed on two adjacent sides of the light guide portion, and the incident portion is located on a side of the light guide portion close to the substrate.
In one embodiment, a space is provided between the LED lamp holder and the light guide member.
In one embodiment, the LED lamp socket has a sectional width greater than that of the light guide member.
In one embodiment, the air barrier layer has a length equal to the length of the light-guiding member.
In one embodiment, the thickness of the air barrier layer is 3 mm-3.5 mm.
In one of the embodiments, the air barrier has a rectangular cross-section.
In one embodiment, the width of the cross section of the air barrier is 0.2 mm-1.5 mm.
In one embodiment, the air barrier has an isosceles triangle cross-section.
In one embodiment, the width of the air barrier increases from a side close to the bridging seat to a side far away from the bridging seat.
In one embodiment, the light guide plate further includes a reinforcing member, a plurality of the light guide members are connected to the reinforcing member, and the reinforcing member is located on a side surface of the light guide member away from the bridging seat.
Compared with the prior art, the utility model discloses at least, following advantage has:
above-mentioned backlight unit with light isolation subregion sets up according to the quantity of LED lamp stand among the light source subassembly through setting up light source subassembly and light guide plate, and sets up between two divisions and separate the light structure, realizes realizing the regional luminance independent control that the side income formula is shaded, realizes higher optical isolation with low costs.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a backlight module with light-isolating partitions according to an embodiment of the present invention;
FIG. 2 is a front view of the backlight module shown in FIG. 1 with light-isolating sections;
fig. 3 is a schematic structural view of a light guide plate according to another embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a backlight module 10 with light-isolating partitions includes: light source subassembly 100 and light guide plate 200, light source subassembly 100 starts the back and gives out light, light guide plate 200 is close to light source subassembly 100 and sets up, the light that light source subassembly 100 sent gets into light guide plate 200 and transmits in light guide plate 200, lead light to the target location by light guide plate 200, wherein be provided with a plurality of light-emitting position on the light source subassembly 100, the inside quantity correspondence according to light-emitting position on the light source subassembly 100 of light guide plate 200 carries out the subregion setting, replace the light isolation effect between each subregion on the microstructure light guide plate improvement light guide plate, and then improve backlight unit's.
Referring to fig. 1 and fig. 2, the light source assembly 100 includes a substrate 110 and a plurality of LED sockets 120, the plurality of LED sockets 120 are mounted on the substrate 110 at intervals, the plurality of LED sockets 120 are all located on the same side of the substrate 110, and a connection line of center points of the LED sockets 120 is a straight line. The substrate 110 is a circuit board, an etching circuit is disposed on the substrate, each LED socket 120 mounted on the substrate 110 is electrically connected to the etching circuit, when the substrate 110 is connected to a power supply, each LED socket 120 is electrically connected to the power supply through the etching circuit, that is, when the backlight module 10 is started, the power supply supplies power to each LED socket 120 to light each LED socket 120, and light emitted by each lighted LED socket 120 is emitted into the light guide plate 200 and transmitted to a target position by the light guide plate 200.
The LED lamp sockets 120 are mounted on the substrate 110 at intervals, that is, an interval is disposed between every two adjacent LED lamp sockets, so as to prevent light rays emitted by two adjacent LED lamp sockets 120 from interfering with each other when entering the light guide plate 200, and thus, the actual illumination brightness of the backlight module 10 is not affected.
Referring to fig. 1 and 3, the light guide plate 200 includes a bridging seat 210 and a plurality of light guide members 220, the plurality of light guide members 220 are all mounted on the bridging seat 210, the plurality of light guide members 220 are all located on the same side surface of the bridging seat 210, and an air isolation layer 230 is disposed between every two adjacent light guide members 220, that is, the light guide members 220 and the air isolation layers 230 are alternately distributed on the bridging seat 210. The refractive index of the light guide member 220 is different from the refractive index of the air interlayer 230, and the air interlayer 230 prevents light from being emitted from the light guide member 220, so that the light is prevented from being dispersed in the transmission process of the light guide member.
In one embodiment, the light guide member 220 is a PMMA light guide plate, and the refractive index of the PMMA light guide plate is 1.49, so the total reflection angle of the light inside the light guide member 220 is about 42 °, and during the transmission process of the light inside the light guide member 220, the incident angle of the light reaching the boundary of the light guide member 220 exceeds 42 °, that is, the included angle 250 from the inside of the light guide member 220 to the interface between the light guide member 220 and the air interlayer 230 exceeds 42 °, and the light will be totally reflected.
Specifically, the maximum incident angle of the light ray incident on the light guide member 220 from the side surface of the light guide member 220 is 90 °, as shown in fig. 2, the refraction angle of the light ray 121 emitted from the LED socket 120 is 42 ° after the light ray 121 enters the light guide member 220, and as the light ray 121 extends, when the light ray exits to the air again from the side surface of the light guide member 220, the exit angle thereof is 48 ° which exceeds the critical angle of the total reflection condition, and thus the total reflection will occur. Therefore, the light ray 121 entering from the side surface of the light guide member 220 cannot exit from the adjacent interface perpendicular to the incident surface. Thereby achieving the region isolation of the light inside the light guide member 220.
Referring to fig. 1, the LED lamp sockets 120 are disposed toward the light guide members 220 in a one-to-one correspondence, in one of the light guide members 220, the light guide member 220 includes an incident portion 221, a light guide portion 222, and an emergent portion 223, the incident portion 221 and the emergent portion 223 are respectively disposed on two adjacent sides of the light guide portion 222, and the incident portion 221 is located on one side of the light guide portion 222 close to the substrate 110, specifically, the light guide portion 222 is disposed toward the LED lamp sockets 120, and the emergent portion 223 is disposed toward a user, in other words, if the emergent portion 223 facing the user is defined as a front surface, the incident portion 221 is located on a side surface, and the light guide portion 222 is a back surface. The light emitted from the LED lamp socket 120 enters the light guide member 220 through the light incident portion 221, passes through the light guide portion 222, and finally exits the light guide member 220 through the light exiting portion 223. The light rays cannot be dispersed from the interface of the light guide member 220 and the air interlayer 230 in the process of transmitting inside the light guide member 220, and can be emitted out only at the light emitting part 223, so that the mutual interference between two adjacent light guide members 220 is effectively avoided, and the light emission of all parts on the same light guide member 220 is more uniform.
Take the pilot lamp on the electronic product as an example, pilot lamp on the product can be provided with a plurality ofly, and in order to save space, the interval between two adjacent pilot lamps is very little, when adopting the light of ordinary light guide plate transmission light source, because light disperses on the adjacent light guide component, leads to two adjacent pilot lamps all to send the light, influences the normal judgement of user. The light guide plate 200 in the above scheme can solve the problem well.
Specifically, referring to fig. 1, the bridge seat 210 and the plurality of light guide members 220 are integrally formed. The manufacturing method of the air barrier 230 in the light guide plate 200 is as follows: the air isolation layer 230 is made by using a mold, when the cutting die is heated to a temperature that can melt the light guide member 220, the cutting die is pressed into the light guide member 220, then the mold is gradually cooled and taken out, after the mold is taken out, a cavity is formed at the position of the original cutting die, the light guide plate 200 is divided into a plurality of mutually independent light guide members 220 by the cavity, and the cavities are the air isolation layer 230.
Further, in order to improve the light guiding effect, a space is provided between the LED socket 120 and the light guiding member 220, the cross-sectional width of the LED socket 120 is greater than the cross-sectional width of the light guiding member 220, and the length of the air isolation layer 230 is equal to the length of the light guiding member 220.
In order to improve the light-blocking effect of the air barrier layer 230, the thickness of the air barrier layer 230 is 3mm to 3.5 mm.
In one embodiment, referring to FIG. 2, the air barrier 230 has a rectangular cross-section. The air barrier 230 has a cross-sectional width of 0.2mm to 1.5 mm. In another embodiment, as shown in FIG. 3, the air barrier 230 has an isosceles triangle cross-section. The width of the air barrier 230 increases from the side near the bridging seat 210 to the side away from the bridging seat 210.
Referring to fig. 3, in order to improve the structural strength of the light guide plate 200, the light guide plate 200 further includes a reinforcing member 240, the light guide members 220 are all connected to the reinforcing member 240, and the reinforcing member 240 is located on a side surface of the light guide member 220 away from the bridging seat 210. The reinforcing member 240, the bridge seat 210 and the plurality of light guide members 220 are integrally formed, and the manufacturing method thereof is as follows: the air isolation layer 230 is made by using a mold, when the cutting die is heated to a temperature that can melt the light guide member 220, the cutting die is pressed into the light guide member 220, then the mold is gradually cooled and taken out, after the mold is taken out, a cavity is formed at the position of the original cutting die, and then the light guide plate 200 is immersed into the liquid state of the melted raw material of the light guide plate 200, so that the reinforcing member 240 is formed on one side of the light guide member 220 away from the bridge plate 210 to seal the air isolation layer 230. The light guide plate 200 manufactured by the method can be more rigid than the light guide member 220 of the open air interlayer 230.
Compared with the prior art, the utility model discloses at least, following advantage has:
above-mentioned backlight unit with light isolation subregion is through setting up light source subassembly and light guide plate 200, and light guide plate 200 carries out the subregion according to the quantity of LED lamp stand 120 in the light source subassembly and sets up light isolation structure between two subregions, realizes realizing the regional luminance independent control that the side income formula is shaded, realizes higher optical isolation degree with low costs.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A backlight module having light-isolating sections, comprising:
the LED lamp holder comprises a base plate and a plurality of LED lamp holders, wherein the plurality of LED lamp holders are arranged on the base plate at intervals, and the plurality of LED lamp holders are all positioned on the same side surface of the base plate;
the LED lamp comprises a light guide plate, a light source and a plurality of LED lamp holders, wherein the light guide plate comprises a bridging seat and a plurality of light guide members, the plurality of light guide members are all arranged on the bridging seat, the plurality of light guide members are all positioned on the same side face of the bridging seat, an air interlayer is arranged between every two adjacent light guide members, and the plurality of LED lamp holders are arranged towards the plurality of light guide members in a one-to-one correspondence manner;
in one of the light guide members, the light guide member includes an incident portion, a light guide portion, and an emergent portion, the incident portion and the emergent portion are respectively disposed on two adjacent sides of the light guide portion, and the incident portion is located on a side of the light guide portion close to the substrate.
2. The backlight module with light-isolating sections as claimed in claim 1, wherein a space is provided between the LED lamp holder and the light guide member.
3. The backlight module having light-isolating sections as claimed in claim 1, wherein the LED lamp holder has a cross-sectional width greater than that of the light guide member.
4. The backlight module with light-isolating sections as claimed in claim 1, wherein the air-isolating layer has a length equal to that of the light-guiding member.
5. The backlight module with light-isolating sections as claimed in claim 1, wherein the air barrier layer has a thickness of 3mm to 3.5 mm.
6. The backlight module having light-isolating sections as claimed in claim 1, wherein the air barrier has a rectangular cross-section.
7. The backlight module with light-isolating sections as claimed in claim 6, wherein the air barrier has a cross-sectional width of 0.2mm to 1.5 mm.
8. The backlight module having light-isolating sections as claimed in claim 1, wherein the air barrier has an isosceles triangle cross-section.
9. The backlight module having light-isolating sections as claimed in claim 8, wherein the width of the air barrier layer increases from a side near the bridging seat to a side away from the bridging seat.
10. The backlight module with light-isolating partition as claimed in claim 1, wherein the light guide plate further comprises a stiffening member, a plurality of light guide members are connected to the stiffening member, and the stiffening member is located on a side of the light guide member away from the bridging seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921656126.9U CN210894765U (en) | 2019-09-30 | 2019-09-30 | Backlight module with optical isolation partition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921656126.9U CN210894765U (en) | 2019-09-30 | 2019-09-30 | Backlight module with optical isolation partition |
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| Publication Number | Publication Date |
|---|---|
| CN210894765U true CN210894765U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921656126.9U Active CN210894765U (en) | 2019-09-30 | 2019-09-30 | Backlight module with optical isolation partition |
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| Country | Link |
|---|---|
| CN (1) | CN210894765U (en) |
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- 2019-09-30 CN CN201921656126.9U patent/CN210894765U/en active Active
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