A backlight and front light source brightness enhancement structure

Abstract

The utility model discloses a backlight source and a frontlight source brightness enhancement structure, comprising a light guide plate, a plurality of lamp beads are arranged at intervals on one side of the light guide plate, a plurality of reflection points are arranged at intervals on the side of the light guide plate opposite to the lamp beads, the reflection points are used to reflect the light emitted by the lamp beads, and the light is reflected at a certain angle by setting the reflection points, so that the reflected light can be avoided from overlapping with the light emitted by the lamp beads, and this part of the reflection relationship is fully utilized, and the reflected light will fall on the area between the two lamp beads, and a reflection film 1 is provided on this area, and the reflection film 1 will reflect the light again, so as to achieve the purpose of extending the light path, that is, improve the utilization rate of the light.

Description

Technical Field

[0001] The utility model belongs to the technical field of backlight plates and electronic paper front lights, in particular to a backlight source and front light source brightness enhancement structure. Background Art

[0002] Backlight and frontlight are necessary parts for electronic display screens and electronic paper. Their main function is to provide background lighting for LCD screens or electronic paper, so that images can be clearly seen in dark environments. Currently, there are two common ways to increase the brightness of backlight and frontlight:

[0003] 1. Increase the number of lamp beads or use lamp beads with higher power;

[0004] 2. Improve the light utilization rate of backlight and front light;

[0005] The first point mentioned above, increasing the number of lamp beads and using high-power lamp beads will make the structure of the backlight panel very crowded and increase power consumption, which is not friendly to mobile devices. Therefore, more consideration is given to improving the light utilization rate. The current mainstream approach is to add a reflective film on the inside of the backlight source and the front light source. However, when the light hits the reflective film, most of the light will be reflected vertically onto the lamp beads, such as Figure 1 As shown, these are all invalid reflections and the utilization rate is still low. Utility Model Content

[0006] The purpose of the utility model is to provide a backlight source and a frontlight source brightness enhancement structure to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A backlight source and frontlight source brightness enhancement structure comprises a light guide plate, a plurality of lamp beads are arranged at intervals on one side of the light guide plate, and a plurality of reflection points are arranged at intervals on the side of the light guide plate opposite to the lamp beads, wherein the reflection points are used to reflect the light emitted by the lamp beads.

[0009] According to a further technical solution, a reflective film is provided on one side of the light guide plate located on the lamp bead.

[0010] According to a further technical solution, a second reflective film is provided on one side of the light guide plate located at the reflection point.

[0011] According to a further technical solution, the reflection point has a reflection edge, and the inclination angle of the reflection edge is less than 45°.

[0012] According to a further technical solution, the light guide plate is a quadrilateral, the lamp beads and the reflection points are arranged on two opposite sides of the light guide plate, and the inner sides of the other two sides of the light guide plate are provided with a reflection film three.

[0013] Beneficial effects of the utility model:

[0014] The utility model sets a reflection point to reflect the light at a certain angle, which can avoid the overlap of the reflected light and the light emitted by the lamp beads, and make full use of this part of the reflection relationship. The reflected light will fall on the area between the two lamp beads, and a reflection film 1 is provided on this area. The reflection film 1 will reflect the light again, thereby achieving the purpose of extending the light path, that is, improving the utilization rate of the light.

[0015] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : Schematic diagram of the prior art structure.

[0017] Figure 2 : Structural diagram of implementation mode 1 of the present utility model.

[0018] Figure 3 : Schematic diagram of the optical path of implementation mode 1 of the present utility model.

[0019] Figure 4 : Structural diagram of implementation mode 2 of the present utility model.

[0020] Figure 5 : Schematic diagram of the light path of the second embodiment of the utility model.

[0021] Figure numerals: 1-light guide plate, 2-lamp bead, 3-reflection film one, 4-reflection point, 5-reflection film two, 6-reflection film three. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] Please refer to Figure 2-5 ;

[0024] The utility model discloses a backlight source and frontlight source brightness enhancement structure, specifically comprising a light guide plate 1. The light guide plate 1 in this embodiment can be determined according to the shape of the product display screen. Most display screens on the market are quadrilateral, so the structure of the light guide plate 1 is also quadrilateral. In addition, there are some special-shaped polygonal display screens on the market, so the light guide plate 1 can also be polygonal. This embodiment is described by taking the backlight in a quadrilateral shape as an example;

[0025] The specific structure includes a plurality of lamp beads 2 arranged at intervals on one side of a light guide plate 1, a reflective film 3 arranged on the side of the light guide plate 1 located at the lamp beads 2, and a plurality of reflective points 4 arranged at intervals on the side of the light guide plate 1 opposite to the lamp beads 2. It should be noted that the reflective points can be convex points or concave points, as long as the reflective function can be achieved;

[0026] In the first embodiment, when working, several lamp beads 2 emit light toward the reflection point 4 at the same time. After the light reaches the surface of the reflection point 4, it will reflect the light at a certain angle, which can avoid the reflected light from overlapping with the light emitted by the lamp beads 2, and make full use of this part of the reflection relationship. Preferably, the light will be reflected toward one side of several lamp beads 2. In this process, the reflected light can fill the area that the light emitted by the lamp beads 2 cannot reach, so that the overall light distribution of the backlight panel and the front light panel is more reasonable. Finally, the reflected light will fall on the area between the two lamp beads 2, and a reflective film 3 is provided on this area. The reflective film 3 will reflect the light again, so as to achieve the purpose of extending the light path, that is, improve the utilization rate of the light. While maintaining the same brightness, the number of lamp beads 2 can be appropriately reduced through the above structure, thereby achieving energy-saving effects.

[0027] It should be noted that the present invention does not involve a structure for making the backlight plate and the front light plate display uniformly. The common practice at present is to set focusing points of different densities on the cover plate, which is a common technical means and will not be described in detail here.

[0028] In addition, there is no mandatory requirement for a one-to-one correspondence between the number of lamp beads and the number of reflection points. Preferably, the number of reflection points is greater than the number of lamp beads. Since the light emitted by the lamp beads is divergent, the reflection points can always reflect the light. Therefore, the positions of the reflection points are not required to correspond to the lamp beads in a straight line.

[0029] In the embodiment of the utility model, a reflective film 2 5 is provided on one side of the light guide plate 1 located at the reflection point 4. The reflective film 2 5 can reflect the light reflected by the reflective film 1 3 again, and multiple reflections are performed between the reflective film 1 3 and the reflective film 2 5, thereby extending the light path as much as possible and further improving the light utilization rate.

[0030] In the embodiment of the utility model, the structure of the emitting convex point is not limited, and it can be arc-shaped, prism-shaped or triangular. Assuming that the reflection point 4 is a triangle, the vertex of the reflection point 4 does not correspond to the vertical light of the lamp bead 2, but the light corresponds to the reflection edge of the triangle, and the inclination angle a of the reflection edge determines the reflection angle of the light; assuming that the inclination angle of the reflection edge is 20°, the light will be reflected multiple times between the reflection film 1 3 and the reflection film 2 5, and the specific embodiment can refer to the above embodiment;

[0031] In the second embodiment, assuming that the inclination angle of the reflection edge is 40°, the light will not be reflected back and forth between the reflection film 1 3 and the reflection film 2 5, and the light reflected by the reflection edge will form a light path toward the side of the light guide plate 1, so that the light path can cross the middle area of ​​the light guide plate 1, which also extends the reflection light path and reduces the energy loss in the multiple reflection process;

[0032] However, the inclination angle of the reflecting edge should be less than 45°, because the 45° hypotenuse will reflect the light at a right angle and will illuminate the adjacent reflection point 4.

[0033] Preferably, the light guide plate 1 is a quadrilateral, the lamp beads 2 and the reflection point 4 are arranged on two opposite sides of the light guide plate 1, and the inner sides of the other two sides of the light guide plate 1 are provided with a reflection film three 6; the light emitted by the lamp beads 2 is divergent, but the light in the middle is the strongest and shines on the reflection point 4, and the rest of the light will shine on the edge of the light guide plate 1 at different angles. This part of the light is reflected again into the light guide plate 1 by the reflection film three 6, so that the light emitted by the lamp beads 2 can be fully utilized.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A backlight source and frontlight source brightness enhancement structure, comprising a light guide plate (1), wherein a plurality of lamp beads (2) are arranged at intervals on one side of the light guide plate (1), characterized in that: A plurality of reflection points (4) are arranged at intervals on a side of the light guide plate (1) opposite to the lamp bead (2), and the reflection points (4) are used to reflect light emitted by the lamp bead (2).

2. The backlight source and frontlight source brightness enhancement structure according to claim 1, characterized in that: The light guide plate (1) is provided with a reflective film (3) on one side of the lamp bead (2).

3. The backlight source and frontlight source brightness enhancement structure according to claim 2, characterized in that: A second reflective film (5) is provided on one side of the light guide plate (1) located at the reflection point (4).

4. The backlight source and frontlight source brightness enhancement structure according to claim 3, characterized in that: The reflection point (4) has a reflection edge, and the inclination angle of the reflection edge is less than 45°.

5. A backlight source and frontlight source brightness enhancement structure according to any one of claims 1 to 4, characterized in that: The light guide plate (1) is a quadrilateral, the lamp beads (2) and the reflection points (4) are arranged on two opposite sides of the light guide plate (1), and the inner sides of the other two sides of the light guide plate (1) are provided with reflection films three (6).

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