CN202916457U - A light guide plate, a LED plane light source, and a display panel - Google Patents

Abstract

The utility model belongs to the technical field of illumination and discloses a light guide plate, an LED plane light source and a display panel. Wherein, one end of the exit surface of the light guide plate corresponding to the side is flush with one end of the bottom surface corresponding to the side, or the end of the exit surface corresponding to the side extends outwards relative to the end of the bottom surface corresponding to the side, and multiple light guide plates are spliced There will be no lighting blind spots. In addition, there is a groove on the side of the light guide plate, and the portion of the groove corresponding to the bottom surface is provided with an incident surface, which ensures that the incident light is evenly emitted after being diffused by the light guide plate. A reflective surface is provided at a portion of the groove corresponding to the outgoing surface, so that light is emitted from the outgoing surface of the light guide plate when emitted, thereby improving light efficiency. The LED planar light source using the light guide plate arranges the light source assembly in the groove of the light guide plate, which can realize the seamless splicing of full light, and improve the display quality of the display panel using the LED planar light source as the backlight source.

Description

Light guide plate, LED flat light source and display panel

technical field

The utility model relates to the technical field of lighting, in particular to a light guide plate, an LED plane light source and a display panel.

Background technique

LED light source has the advantages of using low-voltage power supply, less energy consumption, strong applicability, high stability, short response time, no pollution to the environment, and multi-color light emission. LED planar light sources generally include a light source frame, a light guide plate assembly, a driving power supply, installation connectors, and a light source. According to the position of the light source, LED planar light sources are divided into direct-lit planar light sources and side-lit planar light sources. Among them, the side-lit planar light source receives light from the side, and the thickness of the planar light source can be made thinner to meet the demand for thinner products. However, the light source frame of the side-lit planar light source is relatively large, which leads to the problem of lighting blind spots when splicing multiple light sources in order to increase the lighting area.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is to provide an LED plane light source and its light guide plate, so that multiple light sources can realize seamless splicing of full light when splicing.

The utility model also provides a display panel. The backlight source of the display panel adopts the above-mentioned LED planar light source, so as to realize the seamless splicing of multiple light sources when making a large-sized display panel, and improve the display quality.

(2) Technical solutions

In order to solve the above-mentioned technical problems, the utility model provides a light guide plate, which includes a side surface, a bottom surface connected to the side surface, and an exit surface opposite to the bottom surface. Diffusion particles are arranged in the light guide plate, wherein the exit surface of the light guide plate The end corresponding to the side is flush with the end corresponding to the side of the bottom surface or the end corresponding to the side of the exit surface extends outward relative to the end corresponding to the side of the bottom surface; there is a groove on the side of the light guide plate, and the concave The portion of the groove corresponding to the outgoing surface is provided with a reflective surface, and the portion of the groove corresponding to the bottom surface is provided with an incident surface.

As for the light guide plate mentioned above, preferably, the reflective surface is provided with a reflective plate or coated with a reflective layer.

The above-mentioned light guide plate is characterized in that the shape of the groove is V-shaped or trapezoidal.

For the light guide plate described above, preferably, the bottom surface of the light guide plate is distributed with light guide dots that are dense in the middle and sparse at both ends.

The utility model also provides an LED planar light source, including a light source assembly, a back plate and a reflection structure, wherein the LED planar light source also includes the above-mentioned light guide plate, and the light source module is fixed in the groove of the light guide plate. And the incident direction of the LED lamp corresponds to the incident surface, and the reflective structure is located between the back plate and the light guide plate.

The above-mentioned LED planar light source preferably further includes a diffuser plate arranged above the light guide plate, and the diffuser plate is fixed on the cross-section of the side wall of the back plate by optical glue.

For the LED planar light source above, preferably, the reflective structure is a reflective plate or a reflective layer coated on the back plate.

In the above-mentioned LED planar light source, preferably, the circuit board of the light source assembly is fixed on the reflective surface of the light guide plate through a fixture, and the light of the LED light of the light source assembly passes through the incident surface of the light guide plate into the light guide plate.

For the above-mentioned LED planar light source, preferably, the fixing member is fixed on the reflective surface of the light guide plate by optical glue,

At the same time, the utility model also provides a display panel, which is characterized in that the backlight source of the display panel adopts the above-mentioned LED planar light source.

(3) Beneficial effects

In the light guide plate, LED planar light source and display panel provided by the utility model, one end of the light guide plate corresponding to the side surface is flush with the end corresponding to the side surface of the bottom surface or the end corresponding to the side surface of the light guide plate is corresponding to the bottom surface. One end on the side extends outward, and there is a groove on the side of the light guide plate, and the part of the groove corresponding to the bottom surface is provided with an incident surface, so that there will be no lighting blind area when splicing multiple light guide plates, and it ensures that the incident light passes through After the diffusion and scattering of the light guide plate, it will be emitted evenly. A reflective surface is provided at a portion of the groove corresponding to the outgoing surface, so that light is emitted from the outgoing surface of the light guide plate when emitted, thereby improving light efficiency. The LED planar light source using the light guide plate sets the light source components in the groove of the light guide plate. When splicing multiple light sources in order to increase the lighting area, it can realize seamless splicing of full light, and there will be no lighting blind spots. The display quality of a display panel using the LED plane light source as a backlight source.

Description of drawings

Fig. 1 is the sectional view of LED planar light source in the utility model embodiment;

Fig. 2 is the first schematic diagram of the light path of the LED planar light source in the embodiment of the utility model;

Fig. 3 is the second schematic diagram of the light path of the LED planar light source in the embodiment of the utility model;

Among them, 1: back plate; 2: reflective structure; 3: light guide plate; 4: diffuser plate; 5: light source component; 51: circuit board; 52: LED light group; 6: groove; 7: reflective surface; 8: Light guide dots; 9: raised structure; 10: fixing piece; 11: incident surface.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

It should be noted that the expressions of positional terms in the following content, such as: "upper", "lower", and "bottom", are just for the convenience of description, and are not a limitation.

Embodiment one

As shown in Figures 1-3, the light guide plate 3 in the utility model includes side surfaces, a bottom surface connected to the side surfaces, and an exit surface opposite to the bottom surface (in this embodiment, the light is emitted from the exit surface), and the light guide plate 3 is equipped with The particles are diffused so that the light is evenly distributed in the light guide plate 3, wherein the end of the light guide plate 3 corresponding to the side is flush with the end corresponding to the side of the bottom surface or the end of the exit surface corresponding to the side is corresponding to the bottom surface. One end of the side extends outward, and there will be no lighting blind area when splicing a plurality of light guide plates 3; there is a groove 6 on the side of the light guide plate 3, and a reflective surface 7 is provided at the position corresponding to the exit surface of the groove 6, When the light is emitted, it is emitted from the exit surface of the light guide plate 3 to improve light efficiency; at the same time, an incident surface 11 is also provided at the position corresponding to the bottom surface of the groove 6 (in this embodiment, the light enters the light guide plate 3 from the incident surface 11 Middle), so that the incident light is fully diffused by the light guide plate 3 and then evenly emitted.

In this embodiment, a reflective plate may be provided on the reflective surface 7 , or a reflective layer may be coated to reflect light and prevent outgoing light from exiting the groove 6 .

Wherein, the groove 6 has at least two end surfaces, one of which is used as the reflective surface 7, and the other is used as the incident surface 11, such as: the shape of the groove 6 is V-shaped (as shown in Figure 2) or trapezoidal (as shown in Figure 3 ).

In order to further evenly distribute the light in the light guide plate 3 , light guide dots 8 may be distributed on the bottom surface of the light guide plate 3 . Since the incident surface 11 of the light is located on the side of the light guide plate 3 , it is preferable that the light guide dots 8 on the bottom surface of the light guide plate 3 are densely distributed in the middle and sparsely distributed at both ends.

The light guide plate provided by the utility model includes a side surface, a bottom surface connected to the side surface, and an exit surface opposite to the bottom surface. Diffusion particles are arranged in the light guide plate, wherein the exit surface of the light guide plate corresponds to one end of the side surface, and the bottom surface corresponds to the side surface. One end of the light guide plate is flush or the end corresponding to the side of the exit surface extends outward relative to the end of the bottom surface corresponding to the side, so that there will be no lighting blind area when splicing multiple light guide plates. In addition, there is a groove on the side of the light guide plate, and the portion of the groove corresponding to the bottom surface is provided with an incident surface, so as to ensure that the incident light is evenly emitted after being diffused by the light guide plate. A reflective surface is provided at a portion of the groove corresponding to the outgoing surface, so that light is emitted from the outgoing surface of the light guide plate when emitted, thereby improving light efficiency.

Embodiment two

Fig. 1 is a sectional view of the LED planar light source in the embodiment of the utility model. As shown in Figure 1, the LED planar light source in the embodiment of the utility model includes a light source assembly 5, a backplane 1 and a reflection structure 2, and also includes a light guide plate 3 in Embodiment 1, wherein the reflection structure is located between the backplane 1 and the reflection structure 2. Between the light plates 3 , the light source assembly 5 is fixed in the groove 6 of the light guide plate 3 through the fixing member 10 . In order to increase the lighting area, when multiple light sources are spliced, the seamless splicing of full light can be realized, and there will be no lighting blind spots.

A diffusion plate 4 can also be arranged above the light guide plate 3 to diffuse the light, increase the illumination area of the light source, and make the light distribution in the illumination area uniform. Preferably, the diffusion plate 4 is fixed on the side wall section of the backplane 1 by optical glue (such as OCA glue), and there is no need to set a separate fixing piece to fix the diffusion plate 4, so as to avoid increasing the frame of the light source and causing blind spots in the lighting.

Wherein, the reflective structure 2 may be a reflective plate, or a reflective layer coated on the back plate 1 .

In this embodiment, the circuit board 51 of the light source assembly 5 can be fixed on the reflective surface 7 of the groove 6 of the light guide plate 3 through the fixing member 10, as shown in FIG. 2 and FIG. On the reflective surface 7 of the light board 3, since the light source assembly 5 is very light, the optical adhesive can not only provide sufficient fixing strength, but also simplify the structure of the light source. The light from the LED lamp 52 of the light source assembly 5 enters the light guide plate 3 through the incident surface 11 of the light guide plate 3 , and a part of the light enters the light guide plate 3 again after being reflected and scattered by the light guide dots 8 on the bottom surface of the light guide plate 3 . In the light guide plate 3, a part of the light passes through the bottom surface of the light guide plate 3 and then enters the light guide plate 3 again after being reflected by the reflective structure 2, and then in the light guide plate 3 after passing through the diffusion of diffused ions and the reflection of the reflective surface 7 of the groove 6 , emitted from the exit surface of the light guide plate 3 .

The side of the light guide plate of the LED planar light source provided by the utility model has a groove, and the light source assembly is fixed in the groove of the light guide plate. When splicing multiple light sources in order to increase the lighting area, full light can be realized. Seamless stitching.

Embodiment Three

The utility model also provides a display panel, and the backlight source of the display panel adopts the LED plane light source in the second embodiment. When making a large-sized display panel, the use of the LED planar light source can realize full-illumination seamless splicing of multiple light sources, and improve the display quality of the display panel.

The above is only the preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and replacements can also be made. And replacement should also be regarded as the protection scope of the present utility model.

Claims (10)

1. a light guide plate comprises side, the bottom surface that links to each other with the side and the exit facet relative with the bottom surface, it is characterized in that, is provided with diffusion particle in the described light guide plate; The exit facet of described light guide plate is held neat or exit facet corresponding to an end of side and bottom surface level with both hands corresponding to one of side and is stretched out with respect to the end of bottom surface corresponding to the side corresponding to an end of side; Have groove on the side of described light guide plate, described groove is provided with reflecting surface corresponding to the position of exit facet, and described groove is provided with the plane of incidence corresponding to the position of bottom surface.

2. light guide plate according to claim 1 is characterized in that, is provided with reflector on the described reflecting surface or applies reflector layer.

3. light guide plate according to claim 1 and 2 is characterized in that, described groove cross section is shaped as V-arrangement, and described V-type groove is reflecting surface corresponding to the plane of exit facet, and described V-type groove is the plane of incidence corresponding to the position of bottom surface.

4. light guide plate according to claim 1 and 2 is characterized in that, described groove cross section is shaped as trapezoidal, and described trapezoidal groove is reflecting surface corresponding to the plane of exit facet, and described trapezoidal type groove is the plane of incidence corresponding to the position of bottom surface.

5. light guide plate according to claim 1 and 2 is characterized in that, the leaded light site that dredged at close two ends in the middle of described bottom surface of light guide plate was distributed with.

6. LED planar light source, comprise light source assembly, backboard and reflection configuration, it is characterized in that, described LED planar light source also comprises the arbitrary described light guide plate of claim 1-5, described light source module is fixed in the light guide plate groove, and the corresponding plane of incidence of the incident direction of LED lamp, described reflection configuration is between described backboard and light guide plate.

7. LED planar light source according to claim 6 is characterized in that, also comprises the diffuser plate that is arranged on described light guide plate top, and described diffuser plate is fixed on the sidewall of described backboard by optical cement.

8. LED planar light source according to claim 6 is characterized in that, described reflection configuration is reflecting plate or is coated in reflection horizon on the described backboard.

9. LED planar light source according to claim 6 is characterized in that, the wiring board of described light source assembly is fixed on the reflecting surface of described light guide plate, and the light of the LED lamp of described light source assembly is injected in the described light guide plate by the plane of incidence of described light guide plate.

10. a display panel is characterized in that, the backlight of described display panel adopts the arbitrary described LED planar light source of claim 6-9.

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