Light guide plate, backlight module and display equipment

Abstract

The utility model discloses a light guide plate, a backlight module and a display device. The long edge of the light guide plate is provided with a glue inlet. The light guide plate is divided into a glue inlet side and a non-glue inlet side by taking the central axis as a boundary, the side close to the glue inlet is the glue inlet side, and the side far away from the glue inlet is the non-glue inlet side; the glue inlet side and the non-glue-inlet side are each provided with a sawtooth structure, and the ratio of the sawtooth structure of the glue inlet side to the sawtooth structure of the non-glue-inlet side is 1: 2. According to the light guide plate, the backlight module and the display equipment, the light splitting effect of actual sawteeth on a light source can be consistent, and the problem of local bright package is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid crystal display, and relates to a long-side glue-feeding light guide plate, a backlight module and a display device. Background Art

[0002] As end customers increasingly demand stricter product cost control and the trend toward thin, lightweight full-screen displays continues, backlight units / LCDs / touchscreen LCDs require increasingly thinner and larger light guide plates (LGPs), placing increasingly stringent demands on LGP molds. Traditional molds with wide-side gluing cannot meet the requirements of injection molding. Consequently, the gluing port is moved to the long side to increase the gluing area and reduce injection pressure within the mold cavity.

[0003] While long-edge gluing can be helpful for thinner product molding, it can also introduce cosmetic flaws for optically demanding light guide plates (LGPs). For example, even with identical light-entry serrations, when assembled into a backlight unit / LCD / touchscreen LCD, the light source side near the gluing port may exhibit a localized glare. This is because serrations near the gluing port are more effective than those further away. While the left and right sides have the same design, the gluing port side's serrations produce a better light-splitting effect than the side further away, resulting in a localized glare.

[0004] Therefore, it is necessary to improve the existing technology to overcome the defects in the existing technology. Utility Model Content

[0005] The purpose of the utility model is to provide a light guide plate structure, which improves the different light splitting effects between the glue port side and the non-glue port side caused by injection molding and solves the problem of local bright package.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A light guide plate is provided with a glue inlet on a long side of the light guide plate; the light guide plate is divided into a glue inlet side and a non-glue inlet side by a central axis, wherein the side close to the glue inlet is the glue inlet side, and the side away from the glue inlet is the non-glue inlet side; the glue inlet side and the non-glue inlet side are both provided with a serrated structure, and the ratio of the serrated structure on the glue inlet side to the serrated structure on the non-glue inlet side is 1:2.

[0008] Furthermore, the ratio of the number of the serration structures on the non-glue inlet side to the number on the glue inlet side is 100:75.

[0009] Furthermore, the ratio of the volume of the serrated structure on the non-glue inlet side to the volume on the glue inlet side is 100:75.

[0010] Furthermore, the sawtooth layer of the sawtooth structure is an isosceles triangle structure.

[0011] Furthermore, the top angle of the saw teeth is 90°.

[0012] Furthermore, the distance between two adjacent saw teeth is between 0.3 mm and 0.4 mm.

[0013] The utility model also provides a backlight module, which comprises the light guide plate of the above structure.

[0014] The utility model also provides a display device, comprising the light guide plate of the above structure.

[0015] The above technical solution has the following beneficial effects: the light guide plate provided by the above technical solution can achieve consistent light splitting effect of actual saw teeth on the light source, thereby improving the problem of local bright spots; and further, it can improve the local bright spots of the backlight module / display device (LCD / touch LCD). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0018] Figure 1 This is a structural diagram provided by the utility model.

[0019] Figure 2 for Figure 1 A magnified schematic diagram of area A in the middle.

[0020] Figure 3 for Figure 1 Schematic diagram of the enlarged area B.

[0021] In the figure: S1-non-glue inlet side; S2-glue inlet side; N-glue inlet; M-center axis; 100-light guide plate. DETAILED DESCRIPTION

[0022] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0023] Example

[0024] See also Figure 1-Figure 3 As shown, a light guide plate 100 has a glue inlet N provided on its long side. The light guide plate is divided into a glue inlet side S2 and a non-glue inlet side S1 along its central axis M. The side closest to the glue inlet N is the glue inlet side S2, and the side farther from the glue inlet N is the non-glue inlet side S1. The light guide plate 100 is provided with a serrated structure for light entry, and the serrated structure is provided on both the glue inlet side S2 and the non-glue inlet side S3.

[0025] To improve the problem of localized bright spots, this application document sets the ratio of the sawtooth structure on the glue inlet side S2 to the sawtooth structure on the non-glue inlet side S1 to 1:2. Through this structural design, the actual sawtooth can achieve a consistent light splitting effect for the light source, thereby improving the problem of localized bright spots.

[0026] In this embodiment, the ratio of the number of the sawtooth structures on the non-glue inlet side S1 to the number on the glue inlet side S2 is 100:75. Alternatively, the ratio of the volume of the sawtooth structures on the non-glue inlet side S1 to the volume on the glue inlet side S2 is 100:75.

[0027] The specific parameters of this embodiment are as follows: the sawtooth structure has a sawtooth layer with an isosceles triangle structure, and the vertex angle of the sawtooth is 90°.

[0028] The width of a single sawtooth on the non-glue inlet side S1 is D1, the distance between two adjacent sawtooths is W1, and the thickness of the light guide plate is H1. The parameters of D1 are 0.08mm±0.002mm, W1 are 0.3mm±0.002mm, and H1 are 0.04mm±0.002mm.

[0029] The width of a single sawtooth on the glue inlet side S2 is D2, the distance between two adjacent sawtooths is W2, and the thickness of the light guide plate is H2. The parameters of D2 are 0.08mm±0.002mm, W2 are 0.4mm±0.002mm, and H2 are 0.04mm±0.002mm.

[0030] The utility model adopts the light guide plate of the above structure, which can achieve the same light splitting effect of the actual saw teeth on the light source, improve the problem of local bright spots, and improve the light splitting performance of the light guide plate.

[0031] The present invention also provides a backlight module / display device (liquid crystal display / touch liquid crystal display), which solves the problem of local bright spots based on the improvement of the light guide plate and improves the image quality of the device during use.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A light guide plate, wherein a glue inlet is provided at a long side of the light guide plate; characterized in that: The light guide plate is divided into a glue inlet side and a non-glue inlet side by the central axis, wherein the side close to the glue inlet is the glue inlet side, and the side away from the glue inlet is the non-glue inlet side; both the glue inlet side and the non-glue inlet side are provided with a serrated structure, and the ratio of the serrated structure on the glue inlet side to the serrated structure on the non-glue inlet side is 1:

2.

2. The light guide plate according to claim 1, characterized in that: The ratio of the number of the sawtooth structures on the non-glue inlet side to the number on the glue inlet side is 100:

75.

3. The light guide plate according to claim 1, characterized in that: The ratio of the volume of the sawtooth structure on the non-glue inlet side to the volume of the glue inlet side is 100:

75.

4. The light guide plate according to claim 2 or 3, characterized in that: The sawtooth structure has a sawtooth layer with an isosceles triangle structure.

5. The light guide plate according to claim 4, characterized in that: The top angle of the saw teeth is 90°.

6. The light guide plate according to claim 4, characterized in that: The distance between two adjacent saw teeth is between 0.3 mm and 0.4 mm.

7. A backlight module, characterized in that: A light guide plate comprising the light guide plate according to any one of claims 1 to 6.

8. A display device, characterized in that: A light guide plate comprising the light guide plate according to any one of claims 1 to 6.

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