Backlight module

Abstract

The utility model discloses a backlight module which comprises a light source, a circuit board, a backlight shell, a light guide plate and a first yellow light filtering glue layer. A containing groove is formed in the backlight shell, the light guide plate and the light source are arranged in the containing groove, the light source and the light guide plate are arranged on the same horizontal line, one end of the circuit board is arranged on the edge of the upper surface of the light guide plate, the light source is electrically connected with the circuit board, and the other end of the circuit board is electrically connected with the backlight shell. The first yellow light filtering glue layer is arranged on the upper / lower surface of the light source, so that the light-emitting surface of the light source can transmit light to the light guide plate, the first yellow light filtering glue layer can absorb yellow light and reduce the yellow light entering the light guide plate, the near light source side and the far light source side of the light guide plate both present blue light, the chromaticity uniformity of the display surface of the display screen is improved, and the display effect of the display screen is improved. And the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the field of backlight, in particular to a backlight module. Background Art

[0002] The display module uses backlight LED as the light source, which is reflected and refracted by the backlight film material to provide light to the display module. Since the backlight LED is excited by phosphor, the phosphor (yellowish light) is mainly distributed on the cup wall, and the light refracted from the cup wall is mainly on the light guide plate near the lamp bead side. Therefore, the display module will be yellowish on the side near the lamp and blueish on the side far from the lamp. There is a chromaticity difference at both ends of the display module, the optical visual effect of the display module is poor, and the product competitiveness is low. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a backlight module.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A backlight module comprises: a light source, a circuit board, a backlight shell, a light guide plate and a first yellow light filtering adhesive layer; a receiving groove is provided in the backlight shell, the light guide plate and the light source are arranged in the receiving groove, and the light source and the light guide plate are arranged on the same horizontal line, one end of the circuit board is arranged on the upper surface edge of the light guide plate, the light source is electrically connected to the circuit board, and the first yellow light filtering adhesive layer is arranged on the upper / lower surface of the light source.

[0006] In one embodiment, the backlight module further includes a glue layer, and the first yellow light filtering glue layer is bonded to the light source through the glue layer.

[0007] In one embodiment, the first yellow light filtering glue layer includes a first PET film and a first white ink layer, the first white ink layer is arranged above the first PET film, and the first PET film is bonded to the glue layer.

[0008] In one of the embodiments, the backlight module also includes a second filter rubber layer, which is arranged on the light path between the light source and the light guide plate, and the second filter rubber layer is arranged on the side wall of the backlight shell, and the second filter rubber layer includes a second PET film and a second white ink layer, and the second white ink layer is arranged above the second PET film.

[0009] In one embodiment, the second PET film is made of titanium dioxide.

[0010] In one embodiment, the circuit board is an FPC.

[0011] In one embodiment, the light source is an LED lamp bead.

[0012] In one embodiment, the LED lamp beads are equally spaced.

[0013] In one embodiment, the LED lamp beads are arranged in a straight line.

[0014] In one embodiment, the number of the LED lamp beads is 16.

[0015] Compared with the prior art, the utility model has at least the following advantages:

[0016] The backlight module of the utility model is provided with a light source, a circuit board, a backlight shell, a light guide plate and a first yellow light filtering adhesive layer. The first yellow light filtering adhesive layer is provided on the upper / lower surface of the light source so that the light emitting surface of the light source can transmit light to the light guide plate. The first yellow light filtering adhesive layer includes a first PET film and a first white ink layer. The material of the first PET film is titanium dioxide. The first PET film improves the brightness of the LED through diffuse reflection. The first white ink layer contains fluorescent powder that can absorb yellow light in the 500-600nm band, reduces the yellow light entering the light guide plate, and makes the near light source side and the far light source side of the light guide plate present blue light, thereby improving the chromaticity uniformity of the display surface of the display screen, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0018] Figure 1 is a schematic cross-sectional structure diagram of a backlight module in an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the side structure of a circuit board and a light source in one embodiment of the utility model;

[0020] Figure 3 The figure is a schematic diagram of the exploded structure of a circuit board and a light source in one embodiment of the utility model.

[0021] Reference numerals:

[0022] The backlight module 100 , the light source 10 , the circuit board 20 , the backlight housing 30 , the light guide plate 40 , the first yellow light filtering adhesive layer 50 , and the second yellow light filtering adhesive layer 60 . DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0024] This application proposes a backlight module 100, see Figure 1, Figure 2 and Figure 3 , including: a light source 10, a circuit board 20, a backlight shell 30, a light guide plate 40 and a first yellow light filtering adhesive layer 50. The function of the light guide plate 40 is to transform the point light source 10 of the light source 10 into a surface light source 10, so that the light emitted by the light source 10 is more uniform. A receiving groove is provided in the backlight shell 30, and the light guide plate 40 and the light source 10 are arranged in the receiving groove, and the light source 10 and the light guide plate 40 are arranged on the same horizontal line. The light source 10 emits light on one side thereof, and the side is the side closest to the light guide plate 40. The light emitted by the light source 10 is refracted by the light guide plate 40. One end of the circuit board 20 is arranged on the upper surface edge of the light guide plate 40, the light source 10 is electrically connected to the circuit board 20, and the circuit board 20 is energized with the main board to supply power to the light source 10. The first yellow light filtering adhesive layer 50 is disposed on the side of the light source 10, so that the light emitting surface of the light source 10 can transmit light to the light guide plate 40. The first yellow light filtering adhesive layer 50 can absorb yellow light and reduce the yellow light entering the light guide plate 40, so that both the near light source side and the far light source side of the light guide plate 40 present blue light, thereby improving the chromaticity uniformity of the display surface of the display screen, thereby improving the user experience.

[0025] Preferably, the backlight module 100 further includes a glue layer, which is an acrylic adhesive, has viscosity, and is a light-transmissive material. Therefore, the first yellow light filtering glue layer 50 is bonded to the light source 10 through the glue layer, and the glue layer fixes the first yellow light filtering glue layer 50 on the non-light-emitting surface of the light source 10, thereby improving the stability of the first yellow light filtering glue layer 50.

[0026] Furthermore, the first yellow light filtering adhesive layer 50 includes a first PET film and a first white ink layer, the first white ink layer is arranged on the first PET film, and the first PET film is bonded to the glue layer. The material of the first PET film is titanium dioxide, the first PET film improves the LED brightness through diffuse reflection, and the first white ink layer contains fluorescent powder that can absorb yellow light in the 500-600nm band, which absorbs the yellow light emitted by the light source 10.

[0027] See also Figure 1 The backlight module 100 further includes a second filter rubber layer 60, which is disposed on the light path between the light source 10 and the light guide plate 40, and the second filter rubber layer 60 is disposed on the side wall of the backlight shell 30. The second filter rubber layer 60 contains fluorescent powder that can absorb yellow light or excite blue light, so that the light entering the light guide plate 40 is more uniform and has no color difference. Specifically, the second filter rubber layer 60 includes a second PET film and a second white ink layer, and the second white ink layer is disposed above the second PET film. The second PET film is made of titanium dioxide material, and the surface is uneven and can be diffusely reflected, thereby increasing the brightness entering the light guide plate 40. The second white ink layer contains fluorescent powder that can absorb yellow light or excite blue light.

[0028] In one embodiment, the circuit board 20 is an FPC. The FPC is soft, has good toughness, and can be bent to save space in the backlight module 100 , making the interior of the backlight module 100 more compact.

[0029] In another embodiment, see Figure 1 , Figure 2 and Figure 3 The light source 10 is an LED lamp bead. The LED lamp bead has high environmental benefits and a long life. It can reduce the number of replacement times of the backlight module 100, making the user worry-free. Furthermore, the LED lamp beads are equally spaced, so that the light entering the light guide plate 40 is more uniform, thereby achieving consistent light intensity at various locations on the near-lamp side of the light guide plate 40, thereby achieving a better display effect. Furthermore, the number of LED lamp beads is 16, and the staff sets enough lamp beads to provide sufficient light intensity to avoid weak picture brightness and affect viewing. In addition, the 16 LED lamp beads are arranged in a straight line, so that the brightness of the edge of the picture is consistent with the brightness of the center of the picture, enhancing the viewing experience of the picture.

[0030] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A backlight module, characterized in that: include: Light source, circuit board, backlight shell, light guide plate and first yellow light filtering adhesive layer; A receiving groove is provided in the backlight shell, the light guide plate and the light source are arranged in the receiving groove, and the light source and the light guide plate are arranged on the same horizontal line, one end of the circuit board is arranged on the upper surface edge of the light guide plate, the light source is electrically connected to the circuit board, and the first yellow light filtering adhesive layer is arranged on the upper / lower surface of the light source.

2. The backlight module according to claim 1, characterized in that: It also includes a glue layer, and the first yellow light filtering glue layer is bonded to the light source through the glue layer.

3. The backlight module according to claim 2, characterized in that: The first yellow light filtering glue layer includes a first PET film and a first white ink layer, wherein the first white ink layer is arranged above the first PET film, and the first PET film is bonded to the glue layer.

4. The backlight module according to claim 1, characterized in that: It also includes a second filter rubber layer, which is arranged on the light path between the light source and the light guide plate, and the second filter rubber layer is arranged on the side wall of the backlight shell, and the second filter rubber layer includes a second PET film and a second white ink layer, and the second white ink layer is arranged above the second PET film.

5. The backlight module according to claim 4, characterized in that: The material of the second PET film is titanium dioxide.

6. The backlight module according to claim 1, characterized in that: The circuit board is an FPC.

7. The backlight module according to claim 1, characterized in that: The light source is an LED lamp bead.

8. The backlight module according to claim 7, characterized in that: The LED lamp beads are evenly spaced.

9. The backlight module according to claim 7, characterized in that: The LED lamp beads are arranged in a straight line.

10. The backlight module according to claim 7, characterized in that: The number of the LED lamp beads is 16.

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