CN213240746U - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
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- CN213240746U CN213240746U CN202021852333.4U CN202021852333U CN213240746U CN 213240746 U CN213240746 U CN 213240746U CN 202021852333 U CN202021852333 U CN 202021852333U CN 213240746 U CN213240746 U CN 213240746U
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- guide plate
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- backlight module
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Abstract
The utility model discloses a backlight module, include backplate, light guide plate and be located lamp strip on the backplate, the backplate forms and holds the chamber, the light guide plate with the lamp strip sets up on the bottom plate of backplate and is located hold the intracavity, the lamp strip is located the income light side of light guide plate, wherein, the light guide plate includes the first light guide plate and the second light guide plate of gomphosis, first light guide plate with one side of second light guide plate mutual contact is equipped with a plurality of first light-directing structures and a plurality of second light-directing structure respectively. The utility model provides a backlight module and liquid crystal display device, the light guide plate is becoming the in-process of area source to the line light source, and the light on the surface mesh point can be utilized by the play plain noodles of refracting or reflection play light guide plate about not only hitting the light guide plate, and the parallel light that is on a parallel with the light guide plate from top to bottom the surface also can be utilized by the play plain noodles of many times refraction or reflection play light guide plate, improves the utilization ratio of light source and promotes liquid crystal display device's picture quality.
Description
Technical Field
The utility model belongs to the technical field of show, concretely relates to backlight module and liquid crystal display device.
Background
The liquid crystal display device includes a backlight module and a liquid crystal panel disposed on a light emitting surface side of the backlight module. The backlight module is divided into a side-in type backlight module and a direct type backlight module. The direct-type backlight module is characterized in that a light-emitting light source is arranged behind a liquid crystal panel and directly forms a surface light source to be provided for the liquid crystal panel. The side-in backlight module is characterized in that a light source is arranged at the edge of a back plate at the rear side of the liquid crystal panel, light rays emitted by the light source enter the light guide plate from a light incoming surface at one side of the light guide plate, and are emitted from a light outgoing surface of the light guide plate after being reflected and diffused so as to form a surface light source for the liquid crystal panel. When a point Light source such as a Light Emitting Diode (Light Emitting Diode) is used as a Light source, many LED chips are required to supplement the luminance, and the variation in luminance characteristics becomes very large. The light source is disposed on a side surface perpendicular to the light emitting surface. The light guide plate is disposed to transmit light from the light source to the inside by total reflection and to emit the light in a planar manner. As the light guide plate, a resin plate such as an acrylic resin is generally used. The reflective sheet is disposed on a light reflecting surface opposite to the light emitting surface, and is disposed to reflect light leaking to the light reflecting surface and to cause the liquid crystal panel to emit light. In order to increase the uniformity and intensity of light, dots are generally disposed on the bottom surface of the light guide plate, and the dots serve to change the propagation direction of light.
Fig. 1 is a schematic diagram of a light conducting path in a conventional light guide plate. As shown in fig. 1, a light bar 1 in a conventional side-in type backlight module is disposed at a side of a light guide plate 2 ', a plurality of LED lamps 11 are disposed on the light bar 1, light sources of the LED lamps 11 are linear light sources, the light guide plate 2 ' changes the linear light sources into surface light sources, only light rays 12 striking dots 23 on an upper surface or a lower surface of the light guide plate 2 ' are refracted or reflected out of a light emitting surface of the light guide plate 2 ' to be utilized, most of parallel light rays 12 mainly parallel to the upper surface and the lower surface of the light guide plate 2 ' are directly guided out of the light guide plate 2 ' from a light emitting side of the light guide plate 2 ', only a small part of the light rays are reflected back by a glue frame to be utilized, and the part of light rays 12 can cause defects such as light. In the light emitting surface of the LED lamp 11, the intensity of the middle parallel light is strongest, and the middle parallel light is directly transmitted out of the light guide plate 2 'according to the structure of the current light guide plate 2', so that it is lost.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model provides a backlight module and liquid crystal display device improves the utilization ratio of light source and promotes liquid crystal display device's picture quality, for realizing above-mentioned purpose, the utility model discloses a following technical scheme:
the utility model provides a backlight module includes backplate, light guide plate and is located lamp strip on the backplate, the backplate forms and holds the chamber, the light guide plate with the lamp strip sets up just be located on the bottom plate of backplate hold the intracavity, the lamp strip is located the income light side of light guide plate, wherein, the light guide plate includes the first light guide plate and the second light guide plate of gomphosis, first light guide plate with one side of second light guide plate mutual contact is equipped with a plurality of first light-directing structures and a plurality of second light-directing structure respectively.
Furthermore, a plurality of the first light guide structures and a plurality of the second light guide structures are mutually inserted, and one second light guide structure is inserted between every two adjacent first light guide structures.
Further, the heights of the first light guide structure and the second light guide structure are consistent.
Furthermore, the first light guide structures and/or the second light guide structures are/is far away from one end of the light guide plate base to form a chamfer.
Further, one side, in which the first light guide plate and the second light guide plate are in contact with each other, is provided with a protrusion and a concave hole respectively, and the first light guide plate and the second light guide plate are embedded into each other through the protrusion and the concave hole.
Furthermore, the plurality of first light guide structures are prism-like structures, and the plurality of second light guide structures are inverse prism-like structures.
Further, the light guide plate is an embedded light guide plate, a V-shaped groove is formed in the first light guide plate, the second light guide plate is embedded into the V-shaped groove, and the shape of the second light guide plate is matched with that of the V-shaped groove.
Further, the first light guide structure and the second light guide structure are both light guide dots.
Further, the LED lamp also comprises a reflecting sheet; the reflector plate is positioned between the light guide plate and the bottom plate of the back plate, and a light reflecting structure is arranged on one side, close to the light guide plate, of the reflector plate.
The utility model also provides a liquid crystal display device, including liquid crystal display panel and as above backlight unit, liquid crystal display panel arranges in on backlight unit's the play plain noodles.
The utility model has the advantages that: the utility model provides a backlight module and liquid crystal display device, the light guide plate is becoming the in-process of area source to the line light source, and the light on the surface mesh point can be utilized by the play plain noodles of refracting or reflection play light guide plate about not only hitting the light guide plate, and the parallel light that is on a parallel with the light guide plate from top to bottom the surface also can be utilized by the play plain noodles of many times refraction or reflection play light guide plate, improves the utilization ratio of light source and promotes liquid crystal display device's picture quality.
Drawings
FIG. 1 is a schematic diagram of a light conducting path in a conventional light guide plate;
FIG. 2 is a schematic view of the backlight module of the present invention;
fig. 3 is a schematic diagram of a light guide plate according to an embodiment of the present invention;
FIG. 4 is a first schematic structural diagram of a reflector of the present invention;
FIG. 5 is a schematic structural view of a second reflector of the present invention;
fig. 6 is a schematic diagram of a second light guide plate according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a structure of a light guide plate according to an embodiment of the present invention;
fig. 8 is a schematic view of a partial structure of a three-light guide plate according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a structure of four light guide plates according to an embodiment of the present invention.
In the figure:
10-a backlight module;
1-lamp strip, 11-LED lamp, 12-ray;
2-light guide plate, 20-V-shaped groove, 21-first light guide plate, 210-protrusion, 211-first light guide structure, 22-second light guide plate, 220-concave hole, 222-second light guide structure;
3-back plate, 31-bottom plate, 32-side plate, 30-containing cavity;
4-reflective sheet, 41-reflective structure.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures. Numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in the following description in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Example one
FIG. 2 is a schematic view of the backlight module of the present invention; fig. 3 is a schematic diagram of a light guide plate according to an embodiment of the present invention; FIG. 4 is a first schematic structural diagram of a reflector of the present invention; fig. 5 is a schematic structural diagram of the reflector of the present invention.
As shown in fig. 2 to 5, the utility model provides a backlight module 10, backlight module 10 include backplate 3, light guide plate 2 and be located lamp strip 1 on backplate 3, and backplate 3 includes bottom plate 31 and encloses the curb plate 32 of establishing around bottom plate 31, and bottom plate 31 and curb plate 32 form and hold chamber 30, and light guide plate 2 and lamp strip 1 set up on the bottom plate 31 of backplate 3 and are located and hold chamber 30. Light bar 1 is located the income light side of light guide plate 2, and the array sets up a plurality of LED lamps 11 on light bar 1, the utility model discloses a backlight unit 10 is the income formula backlight unit of inclining. The backlight module 10 further includes a reflector plate 4, the reflector plate 4 is located between the light guide plate 2 and the bottom plate 31 of the back plate 3, and the light guide plate 2 and the reflector plate 4 cooperate to convert the linear light source of the light bar 1 into a surface light source to be emitted from the light emitting surface of the light guide plate 2.
The light guide plate 2 includes a first light guide plate 21 and a second light guide plate 22 which are embedded with each other, a plurality of first light guide structures 211 are arranged in an array on one side of the first light guide plate 21 and the second light guide plate 22 which are in contact with each other, and a plurality of second light guide structures 222 are arranged in an array on one side of the second light guide plate 22 which is in contact with the first light guide plate 21. In this embodiment, the first light guide structures 211 and the second light guide structures 222 are inserted into each other, one second light guide structure 222 is inserted into two adjacent first light guide structures 211, or one first light guide structure 211 is inserted into two adjacent second light guide structures 222, as for example, the direction indicated by the arrow in the figure is taken as an example, from left to right, the heights of the first light guide structures 211 and the second light guide structures 222 are sequentially reduced, and the heights of the first light guide structures 211 and the second light guide structures 222 are consistent in a one-to-one correspondence manner according to a sequence from left to right. The heights of the first light guide structures 211 and the second light guide structures 222 can be kept unchanged from left to right, the end, away from the light guide plate substrate, of each of the first light guide structures 211 and/or the second light guide structures 222 can be an oblique plane, and the shape of the space between every two adjacent first light guide structures 211 is matched with the shape of the second light guide structure 222 inserted between the two adjacent first light guide structures 211. The first light guide plate 21 and the second light guide plate 22 are inserted and fitted to each other through the first light guide structure 211 and the second light guide structure 222. The first light guide structure 211 and the second light guide structure 222 are arranged inside the embedded light guide plate 2, and the parallel light emitted by the light bar 1 is reflected or refracted inside the light guide plate 2 through the first light guide structure 211 and the second light guide structure 222 and then is emitted out of the light emitting surface of the light guide plate 2 to be utilized. The light guide plate 2 converts the linear light source of the light bar 1 into a surface light source. The reflecting surface of the reflecting sheet 4 adjacent to the light guide plate 2 is provided with a light reflecting structure 41, and light leaking from the light guide plate 2 is reflected again by the reflecting sheet 4 and utilized. The reflecting structure 41 on the reflector plate 4 can be made into a triangular prism shape or a triangular prism shape as long as the function of reflecting light is played, and the utility model is not limited to this.
Example two
Fig. 6 is a schematic diagram of a second light guide plate according to an embodiment of the present invention.
As shown in fig. 6, the difference between the backlight module 10 of the second embodiment and the first embodiment is the structure of the light guide plate 2, and the structure of the light guide plate 2 of the second embodiment is as follows: the light guide plate 2 includes a first light guide plate 21 and a second light guide plate 22, a protrusion 210 is disposed on a side of the first light guide plate 21 contacting the second light guide plate 22, a concave hole 220 is disposed on a side of the second light guide plate 22 contacting the first light guide plate 21, and the protrusion 210 is engaged with the concave hole 220 to engage the first light guide plate 21 and the second light guide plate 22. Also all be provided with arch 210 and shrinkage pool 220 in the one side of first light guide plate 21 and the mutual contact of second light guide plate 22, arch 210 and shrinkage pool 220 one-to-one cooperation make first light guide plate 21 and the gomphosis of second light guide plate 22, the utility model discloses do not be limited to this. The first light guide structure 211 on the first light guide plate 21 is a prism structure, the second light guide structure 222 on the second light guide plate 22 is an inverse prism structure, the first light guide structure 211 and the second light guide structure 222 are arranged inside the embedded light guide plate 2, and the parallel light emitted by the light bar 1 is reflected or refracted inside the light guide plate 2 through the first light guide structure 211 and the second light guide structure 222 and then is emitted out of the light emitting surface of the light guide plate 2 to be utilized, so that the utilization rate of the light source is improved, and the uniformity of the light source is improved.
EXAMPLE III
Fig. 7 is a schematic diagram of a structure of a light guide plate according to an embodiment of the present invention; fig. 8 is a schematic view of a partial structure of a three-light guide plate according to an embodiment of the present invention.
As shown in fig. 7 and 8, the backlight module 10 according to the third embodiment is different from the above embodiments in that the structure of the light guide plate 2 is different, and the structure of the light guide plate 2 in the present embodiment is as follows: the light guide plate 2 is an embedded light guide plate, the first light guide plate 21 is provided with a V-shaped groove 20 from one side edge to the inside, the second light guide plate 22 is embedded in the V-shaped groove 20, and the shapes of the second light guide plate 22 and the V-shaped groove 20 are matched. The first light guide structure 211 and the second light guide structure 222 are respectively disposed on the sides of the first light guide plate 21 and the second light guide plate 22, which are in contact with each other, and the first light guide structure 211 and the second light guide structure 222 are light guide dots. (the first light guiding structure is not shown in the figure), the light guiding dots are hemispherical, and may be in other shapes as long as the light reflecting or refracting function can be realized, and the present invention is not limited thereto.
Example four
Fig. 9 is a schematic diagram of a structure of four light guide plates according to an embodiment of the present invention.
As shown in fig. 9, the backlight module 10 of the present embodiment is different from the above embodiments in the structure of the light guide plate 2, and the structure of the light guide plate 2 of the present embodiment is as follows:
in this embodiment, the light guide plate 2 is made into a wedge shape, the lower surface of the light guide plate 2 is beveled and the lower surface is provided with light guide dots 211, and according to the light conduction schematic route in the figure, the larger the beveled angle of the lower surface of the light guide plate 2 is, the larger the reutilization rate of the parallel light 12 is. The reflecting structure 41 is arranged on the reflecting sheet 4, and the wedge-shaped light guide plate 2 and the reflecting sheet 4 can improve the utilization rate of the light source.
The utility model also provides a liquid crystal display device includes liquid crystal display panel and foretell backlight unit 10, and display panel installs on backlight unit 10's the play plain noodles.
The utility model has the advantages that: the utility model provides a backlight module and liquid crystal display device, the light guide plate is becoming the in-process of area source to the line light source, and the light on the surface mesh point can be utilized by the play plain noodles of refracting or reflection play light guide plate about not only hitting the light guide plate, and the parallel light that is on a parallel with the light guide plate from top to bottom the surface also can be utilized by the play plain noodles of many times refraction or reflection play light guide plate, improves the utilization ratio of light source and promotes liquid crystal display device's picture quality.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person can make modifications or changes equivalent to the above embodiments without departing from the scope of the present invention, but all the modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are within the scope of the present invention.
Claims (10)
1. The utility model provides a backlight module, includes backplate, light guide plate and is located lamp strip on the backplate, the backplate forms and holds the chamber, the light guide plate with the lamp strip sets up just be located on the bottom plate of backplate hold the intracavity, the lamp strip is located the income light side of light guide plate, its characterized in that, the light guide plate is including the first light guide plate and the second light guide plate of mutual gomphosis, first light guide plate with one side that the second light guide plate contacted each other is equipped with a plurality of first light guide structure and a plurality of second light guide structure respectively.
2. The backlight module according to claim 1, wherein a plurality of the first light guide structures and a plurality of the second light guide structures are connected to each other in an inserted manner, and one of the second light guide structures is connected between two adjacent first light guide structures in an inserted manner.
3. A backlight module according to claim 2, wherein the first and second light guide structures have a uniform height.
4. The backlight module according to claim 3, wherein an end of the first light guide structures and/or the second light guide structures away from the light guide plate substrate is chamfered.
5. The backlight module as claimed in claim 1, wherein the first and second light guide plates have protrusions and recesses at sides thereof contacting each other, and the first and second light guide plates are engaged with each other via the protrusions and recesses.
6. The backlight module according to claim 5, wherein the first light guide structures are prism-like structures, and the second light guide structures are inverse prism-like structures.
7. The backlight module as claimed in claim 1, wherein the light guide plate is an embedded light guide plate, the first light guide plate has a V-shaped groove therein, the second light guide plate is embedded in the V-shaped groove, and the second light guide plate has a shape corresponding to the V-shaped groove.
8. The backlight module as claimed in claim 7, wherein the first and second light guide structures are light guide dots.
9. The backlight module according to claim 1, further comprising a reflective sheet; the reflector plate is positioned between the light guide plate and the bottom plate of the back plate, and a light reflecting structure is arranged on one side, close to the light guide plate, of the reflector plate.
10. A liquid crystal display device, comprising a liquid crystal display panel and the backlight module as claimed in any one of claims 1 to 9, wherein the liquid crystal display panel is disposed on the light-emitting surface of the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021852333.4U CN213240746U (en) | 2020-08-31 | 2020-08-31 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021852333.4U CN213240746U (en) | 2020-08-31 | 2020-08-31 | Backlight module and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213240746U true CN213240746U (en) | 2021-05-18 |
Family
ID=75903935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021852333.4U Active CN213240746U (en) | 2020-08-31 | 2020-08-31 | Backlight module and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213240746U (en) |
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2020
- 2020-08-31 CN CN202021852333.4U patent/CN213240746U/en active Active
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