A light guide plate with V-cut structure for eliminating light spot in front of lamp

Abstract

The utility model discloses a light guide plate of eliminating light spot before lamp adopting V cut structure, including light guide plate main part, the upside of light guide plate main part is the light exit surface, and one end side of light guide plate main part is the light entrance surface, the light entrance surface is perpendicular with the light exit surface, the light exit surface includes visible area and non visible area, and the non visible area is located visible area outside, the first V cut structure is equipped with on the visible area of light exit surface, and the first V cut structure includes a plurality of even arrangement and mutually parallel first V cut unit, the non visible area of light exit surface includes the non visible area before lamp, and the non visible area before lamp is located between the one end of light entrance surface and visible area close to light entrance surface, and the second V cut structure is equipped with on the non visible area before lamp, and the second V cut structure includes a plurality of even arrangement and mutually parallel second V cut unit, and the interval of first V cut unit is 1.5~2.5 times of the interval of second V cut unit, the utility model discloses can eliminate light spot before lamp.

Description

Technical Field

[0001] This utility model relates to the field of light guide plate technology, and in particular to a light guide plate that uses a V-cut structure to eliminate light spots in front of the lamp. Background Technology

[0002] A light guide plate is a key component of a backlight module. Its principle is to use dots to disrupt total internal reflection of the light source, allowing light to exit through the light guide plate and transforming a point light source into a surface light source. Existing light guide plates typically have a V-cut structure on their light-emitting surface. This V-cut structure guides light from the edge towards the viewing direction, increasing brightness and making the light more uniform.

[0003] like Figure 1 As shown, this is a light guide plate in the prior art. The light guide plate includes a light guide plate body 100. The upper side of the light guide plate body 100 is the light emitting surface 1, and one end side of the light guide plate body 100 is the light incident surface 2. The light incident surface 2 is perpendicular to the light emitting surface 1. The light emitting surface 1 includes a visible area 11 and a non-visible area 12. A V-cut structure 3' is provided on the visible area 11. The non-visible area 12 is located outside the visible area 11, and no V-cut structure 3' is provided on the non-visible area 12. The visible area 11 of the light emitting surface 1 is used to provide backlight for the liquid crystal panel, while the non-visible area 12 of the light emitting surface 1 does not need to provide backlight for the liquid crystal panel. When the light guide plate is in use, an LED backlight 200 is provided on one side of the light incident surface 2 of the light guide plate body 100. The light emitted by the LED backlight 200 enters the light guide plate body 100 through the light incident surface 2, and under the reflection of the bottom surface (i.e. the dot surface) of the light guide plate body 100, it is emitted upward from the light emitting surface 1 of the light guide plate body 100.

[0004] However, the existing light guide plate still has the following technical problems in use: When the human eye observes the edges of the non-visible area 12 and visible area 11 near the LED backlight 200 of the light guide plate body 100 at a wide viewing angle, i.e., position a in the figure, a light spot will be observed in front of the lamp. This light spot is caused by the LED backlight 200 having a high light intensity at this position, causing some light to leak upwards. When the operator sets a microstructure sawtooth groove on the light-incident surface 2 of the light guide plate body 100, it can only eliminate the light spot in the visible area 11 near the LED backlight 200 on the light-emitting surface 1, but the light spot in the non-visible area 12 near the LED backlight 200 on the light-emitting surface 1 still cannot be eliminated. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a light guide plate that uses a V-cut structure to eliminate light spots in front of the lamp, based on the shortcomings of the above-mentioned technology. The first V-cut structure above the visible area of ​​the light guide plate can increase the brightness and light uniformity of the light guide plate. The first V-cut structure uses first V-cut units with a large spacing, which can facilitate processing and molding and better meet the backlight requirements. By setting a relatively dense second V-cut unit above the non-visible area in front of the lamp, the light spot in the visible area in front of the lamp on the light-emitting surface can be eliminated, as well as the light spot in the non-visible area in front of the lamp on the light-emitting surface.

[0006] The technical solution of this utility model is: a light guide plate that uses a V-cut structure to eliminate light spots in front of a lamp, comprising a light guide plate body, the upper side of the light guide plate body being a light emitting surface, and one end side of the light guide plate body being a light incident surface, the light incident surface being perpendicular to the light emitting surface, the light emitting surface including a visible area and a non-visible area, the non-visible area being located outside the visible area; a first V-cut structure is provided above the visible area of ​​the light emitting surface, the first V-cut structure including multiple uniformly arranged and parallel first V-cut units; the non-visible area of ​​the light emitting surface includes a non-visible area in front of the lamp, the non-visible area in front of the lamp being located between the light incident surface and the end of the visible area closer to the light incident surface, a second V-cut structure is provided above the non-visible area in front of the lamp, the second V-cut structure including multiple uniformly arranged and parallel second V-cut units, the spacing between the first V-cut units being 1.5 to 2.5 times the spacing between the second V-cut units.

[0007] As a further explanation of this utility model:

[0008] Preferably, the first V-cut unit and the second V-cut unit are perpendicular to the incident light surface, the first V-cut unit has a spacing of 40-55µm and a height of 2.8-3.2µm, and the second V-cut unit has a spacing of 30-35µm and a height of 4.8-5.2µm.

[0009] Preferably, the cross-sections of the first V-cut unit and the second V-cut unit are both arc-shaped, with the arc-shaped cross-section being the most preferred shape. The cross-sections of the first V-cut unit and the second V-cut unit can also be "V"-shaped or trapezoidal.

[0010] Preferably, the light-incident surface of the light guide plate body is provided with multiple vertical micro-structured sawtooth grooves spaced apart.

[0011] The technical effects of this utility model are as follows: Because this utility model has a first V-cut structure above the visible area of ​​the light-emitting surface and a second V-cut structure above the non-visible area in front of the lamp, the first V-cut structure includes multiple uniformly arranged and parallel first V-cut units, and the second V-cut structure includes multiple uniformly arranged and parallel second V-cut units. The spacing between the first V-cut units is 1.5 to 2.5 times the spacing between the second V-cut units. Therefore, on the one hand, the first V-cut structure above the visible area can increase the brightness and light uniformity of the light guide plate; on the other hand, the first V-cut structure above the visible area uses first V-cut units with a larger spacing, which facilitates processing and better meets backlight requirements; furthermore, by setting relatively dense second V-cut units above the non-visible area in front of the lamp, the second V-cut units can disperse the upward-leaking light, eliminating both light spots in the visible area and the non-visible area in front of the lamp on the light-emitting surface. Furthermore, in a preferred embodiment of this invention, multiple vertical micro-structured sawtooth grooves are spaced apart on the light-incident surface of the light guide plate body. These micro-structured sawtooth grooves can first disperse the light emitted by the backlight. After the micro-structured sawtooth grooves disperse the light emitted by the backlight, the light leaking upwards is dispersed a second time by the second V-cut unit, thus achieving the best effect in eliminating light spots in front of the lamp. Attached Figure Description

[0012] Figure 1 This is a top view of the light guide plate structure in the prior art.

[0013] Figure 2 This is a top view schematic diagram of the light guide plate structure of this utility model.

[0014] Figure 3 For along Figure 2 Cross-sectional view and enlarged view of line AA.

[0015] Figure 4 For along Figure 2 Cross-sectional view and enlarged view of the middle BB line.

[0016] In the diagram: 100. Light guide plate body; 1. Light emitting surface; 11. Visible area; 12. Non-visible area; 121. Non-visible area in front of the lamp; 2. Light incident surface; 3. First V-cut structure; 31. First V-cut unit; 4. Second V-cut structure; 41. Second V-cut unit; 5. Microstructure sawtooth groove; 6. Dot surface; 200. LED backlight. Detailed Implementation

[0017] The structural and working principles of this utility model will be further described in detail below with reference to the accompanying drawings.

[0018] like Figures 2-4 As shown, this utility model discloses a light guide plate with a V-cut structure for eliminating light spots in front of a lamp. It includes a light guide plate body 100, the lower side of which is a dotted surface 6, the upper side of which is a light-emitting surface 1, and one end of which is a light-incident surface 2. The light-incident surface 2 is perpendicular to the light-emitting surface 1. The light-emitting surface 1 includes a visible area 11 and a non-visible area 12, with the non-visible area 12 located outside the visible area 11. The visible area 11 of the light-emitting surface 1 provides backlighting for the liquid crystal panel, while the non-visible area 12 does not need to provide backlighting for the liquid crystal panel. The visible area of ​​the light-emitting surface 1... A first V-cut structure 3 is provided on the light guide plate 11. The first V-cut structure 3 includes multiple uniformly arranged and parallel first V-cut units 31. The non-visible area 12 of the light-emitting surface 1 includes a non-visible area 121 in front of the lamp, which is located between the light-incident surface 2 and the end of the visible area 11 closest to the light-incident surface 2. A second V-cut structure 4 is provided on the non-visible area 121 in front of the lamp. The second V-cut structure 4 includes multiple uniformly arranged and parallel second V-cut units 41. The spacing between the first V-cut units 31 is 1.5 to 2.5 times the spacing between the second V-cut units 41. When the light guide plate is in use, an LED backlight 200 is provided on one side of the light-incident surface 2 of the light guide plate body 100. The light emitted by the LED backlight 200 enters the light guide plate body 100 through the light-incident surface 2 and is reflected upward from the light-emitting surface 1 of the light guide plate body 100 by the dot surface 6 of the light guide plate body 100.

[0019] This invention features a first V-cut structure 3 on the visible area 11 of the light-emitting surface 1 and a second V-cut structure 4 on the non-visible area 121 in front of the lamp. The first V-cut structure 3 comprises multiple uniformly arranged and parallel first V-cut units 31, and the second V-cut structure 4 comprises multiple uniformly arranged and parallel second V-cut units 41. The spacing between the first V-cut units 31 is 1.5 to 2.5 times the spacing between the second V-cut units 41. Therefore, on the one hand, the first V-cut structure 3 on the visible area 11... The cut structure 3 can increase the brightness and light uniformity of the light guide plate; on the other hand, the first V-cut structure 3 above the visible area 11 adopts the first V-cut unit 31 with a larger spacing, which can facilitate processing and molding and better meet the backlight requirements; furthermore, by setting a relatively dense second V-cut unit 41 above the non-visible area 121 in front of the lamp, the second V-cut unit 41 can disperse the light that leaks upward, which can eliminate the light spot in the visible area 11 in front of the lamp of the light surface 1, and also eliminate the light spot in the non-visible area 121 in front of the lamp of the light surface 1.

[0020] like Figures 2-4 As shown, the first V-cut unit 31 and the second V-cut unit 41 are perpendicular to the light-incident surface 2. The spacing d1 of the first V-cut unit 31 is 40-55µm, and the height h1 is 2.8-3.2µm. The spacing d2 of the second V-cut unit 41 is 30-35µm, and the height h2 is 4.8-5.2µm. Using this size for the first V-cut unit 31 facilitates processing and best meets the backlight requirements. Using this size for the second V-cut unit 41 allows for processing using current manufacturing processes and effectively disperses and eliminates light spots in front of the lamp when light leaks upwards.

[0021] like Figure 3 and Figure 4 As shown, the cross-sections of the first V-cut unit 31 and the second V-cut unit 41 are both arc-shaped. An arc-shaped cross-section is the most preferred shape for the first V-cut unit 31 and the second V-cut unit 41. Alternatively, the cross-sections of the first V-cut unit 31 and the second V-cut unit 41 can also be V-shaped or trapezoidal.

[0022] like Figure 2 As shown, in a preferred embodiment of this invention, the light-incident surface 2 of the light guide plate body 100 is provided with a plurality of vertical micro-structured sawtooth grooves 5 spaced apart. These micro-structured sawtooth grooves can first disperse the light emitted by the backlight source. After the micro-structured sawtooth grooves 5 disperse the light emitted by the backlight source 200, the light leaking upwards is dispersed a second time by the second V-cut unit 41, thus achieving the best effect in eliminating light spots in front of the lamp.

[0023] The above description is merely a preferred embodiment of this utility model. Any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical solution of this utility model shall fall within the scope of the technical solution of this utility model.

Claims

1. A light guide plate employing a V-cut structure to eliminate light spots in front of a lamp, comprising a light guide plate body (100), wherein the upper side of the light guide plate body (100) is a light emitting surface (1), and one end side of the light guide plate body (100) is a light incident surface (2), wherein the light incident surface (2) is perpendicular to the light emitting surface (1), and the light emitting surface (1) includes a visible area (11) and a non-visible area (12), wherein the non-visible area (12) is located outside the visible area (11); characterized in that: A first V-cut structure (3) is provided on the visible area (11) of the light-emitting surface (1). The first V-cut structure (3) includes multiple uniformly arranged and parallel first V-cut units (31). The non-visible area (12) of the light-emitting surface (1) includes a non-visible area in front of the lamp (121). The non-visible area in front of the lamp (121) is located between the light-incident surface (2) and the visible area (11) near the light-incident surface. A second V-cut structure (4) is provided on the non-visible area in front of the lamp (121). The second V-cut structure (4) includes multiple uniformly arranged and parallel second V-cut units (41). The spacing of the first V-cut units (31) is 1.5 to 2.5 times the spacing of the second V-cut units (41).

2. The light guide plate with V-cut structure for eliminating light spots in front of the lamp according to claim 1, characterized in that: The first V-cut unit (31) and the second V-cut unit (41) are perpendicular to the incident light surface (2). The first V-cut unit (31) has a spacing of 40-55µm and a height of 2.8-3.2µm. The second V-cut unit (41) has a spacing of 30-35µm and a height of 4.8-5.2µm.

3. The light guide plate with V-cut structure for eliminating light spots in front of the lamp according to claim 2, characterized in that: The cross-sections of the first V-cut unit (31) and the second V-cut unit (41) are both arc-shaped.

4. The light guide plate with V-cut structure for eliminating light spots in front of the lamp according to claim 2, characterized in that: The cross-sections of the first V-cut unit (31) and the second V-cut unit (41) are both "V" shaped or trapezoidal.

5. The light guide plate for eliminating light spots in front of the lamp using a V-cut structure according to any one of claims 1-4, characterized in that: The light-incident surface (2) of the light guide plate body (100) is provided with multiple vertical micro-structure sawtooth grooves (5) spaced apart.

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