Ultrathin medium-size backlight module for improving light leakage

Abstract

The utility model discloses an ultrathin medium-sized backlight module for improving light leakage, which is characterized in that the upper end of a border of an iron frame is of a hook structure, an embedding groove is formed in the corresponding position of the edge of a rubber body of a rubber frame, and relative buckling of the iron frame and the rubber frame is realized through the hook structure and the embedding groove. Meanwhile, due to the fact that the gap is reserved between the hook structure and the embedding groove, when a high-temperature experiment is conducted on the backlight module, deformation and expansion of the rubber frame can be diffused into the reserved gap, the backlight light leakage phenomenon caused by large deformation and arching of the backlight module locally is avoided, and the service life of the backlight module is prolonged. The problems that the backlight lamp socket area of the backlight module is poor in display effect and uneven in visual area brightness in a high-temperature experiment are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal displays, in particular to an ultra-thin middle-sized backlight module with improved light leakage. Background Art

[0002] The backlight module is an important component of the liquid crystal display. At present, the backlight modules used in medium-sized (7-15.6-inch) TFT color screens are mostly side-lit. The principle is to convert the point light source emitted from the side of the LED lamp beads into a surface light source with uniform brightness through the light guide plate and optical film, and provide it to the LCD screen that cannot emit light independently to realize image display. The backlight module is composed of an iron frame, a reflective film, a light guide plate, a small white strip (with double-sided tape), a light bar, a light bar double-sided tape, a glue frame, a diffusion film, a lower light-enhancing film, an upper light-enhancing film, and a light-shielding glue. Figure 1 As shown. During preparation, the above components are first assembled in order and evenly to form a backlight module with no obvious light spots in the lamp socket area and uniform brightness. The backlight module is then placed in a test box to complete a use environment simulation experiment of -30℃ to +80℃ for 96 hours to test the performance of the backlight module, and then a qualified backlight module is obtained. The iron frame and the plastic frame of the current backlight module are connected by a plurality of through holes opened on the frame of the iron frame and lugs provided at corresponding positions on the plastic frame, wherein the upper end of the frame of the iron frame is a straight-through structure, as shown. Figure 2 As shown. When the backlight module made with this structure is subjected to a high temperature test: for a thicker backlight module, because the material of the glue frame is thick, the deformation of the glue frame is small after the high temperature test, so it will not affect the optical display effect of the backlight module; but for an ultra-thin backlight module, because the glue frame material is thin, the high temperature test will cause the glue frame, especially the thin glue position in the direction of the light source (light bar), to deform and expand. At this time, since the outermost side of the glue frame is restricted by the iron frame, most of the deformed and expanded glue frame diffuses toward the inner frame. The diffused glue frame will cause a large deformation arch to appear locally in the backlight module. When the height of this arch reaches 0.5mm to 5mm, the light will be emitted along the gap of this arch to the backlight viewing area, so that a very obvious long light spot appears in the backlight viewing area. Furthermore, because the light bar of the backlight module is attached to the bottom surface of the glue frame with double-sided tape, the deformation and arching of the glue frame in the light source area will also pull and deform the light bar, causing uneven brightness and darkness in the viewing area, light spots in front of the light, and other undesirable problems. Utility Model Content

[0003] The utility model aims to solve the problem that the backlight module of the current structure is prone to backlight leakage during high temperature experiments, resulting in the backlight module being unqualified, and to provide an ultra-thin medium-sized backlight module with improved light leakage.

[0004] To solve the above problems, the utility model is implemented through the following technical solutions:

[0005] The invention discloses an ultra-thin medium-sized backlight module for improving light leakage, which is composed of an iron frame, a reflective film, a light guide plate, a small white strip, a light strip, a double-sided adhesive tape for the light strip, a rubber frame, a diffusion film, a lower light-enhancing film, an upper light-enhancing film and a light-shielding adhesive. The upper end of the frame of the iron frame is in a hook structure, and an embedding groove is provided at the edge of the colloid of the rubber frame. The hook structure of the frame of the iron frame is embedded in the embedding groove of the colloid of the rubber frame.

[0006] In the above solution, a gap is left between the lower surface of the hook structure of the frame of the iron frame and the upper surface of the embedding groove of the colloid of the rubber frame.

[0007] In the above solution, the gap height between the lower surface of the hook structure of the frame of the iron frame and the upper surface of the embedding groove of the colloid of the rubber frame is between 0.1 mm and 0.15 mm.

[0008] Compared with the prior art, the utility model makes the upper end of the frame of the iron frame present a hook structure, and opens an embedding groove at the position corresponding to the edge of the colloid of the plastic frame, and realizes the relative buckling of the iron frame and the plastic frame through the hook structure and the embedding groove. At the same time, since there is a gap between the hook structure and the embedding groove, when the backlight module is subjected to a high temperature test, the deformation and expansion of the plastic frame can be diffused into the reserved gap, so as to avoid the backlight leakage caused by the large deformation and arching of the backlight module locally, so as to improve the problem of poor display effect in the backlight lamp port area and uneven brightness in the viewing area of ​​the backlight module after the high temperature test. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the components of the backlight module.

[0010] Figure 2 It is a partially enlarged schematic diagram of a side section of an existing backlight module.

[0011] Figure 3 It is a partially enlarged schematic side view of the backlight module of the present invention.

[0012] Numbers in the figure: 1. Iron frame, 1-1. Plate body, 1-2. Frame; 2. Reflective film; 3. Light guide plate; 4. Small white strip; 5. Light strip; 6. Double-sided tape for light strip; 7. Glue frame, 7-1. Colloid; 8. Diffusion film; 9. Lower brightness enhancement film; 10. Upper brightness enhancement film; 11. Shading glue. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with specific examples and with reference to the accompanying drawings. It should be noted that the directional terms mentioned in the examples, such as "upper", "lower", "middle", "left", "right", "front", "back", etc., are only referenced to the directions of the accompanying drawings. Therefore, the directions used are only used for illustration and are not used to limit the scope of protection of the utility model.

[0014] In order to solve the problem of light leakage caused by deformation and arching of the light source area of ​​the plastic frame 7 after the ultra-thin backlight high temperature test, the utility model proposes an ultra-thin medium-sized backlight module with improved light leakage, such as Figure 3 As shown, it is composed of an iron frame 1, a reflective film 2, a light guide plate 3, a small white strip 4, a light bar 5, a light bar double-sided adhesive tape 6, a glue frame 7, a diffusion film 8, a lower light-enhancing film 9, an upper light-enhancing film 10 and a light-shielding adhesive tape 11. The iron frame 1 includes a plate body 1-1 and a frame 1-2 connected to the edge of the plate body 1-1, wherein the upper end of the frame 1-2 is a hook structure, that is, the cross-section of the frame 1-2 is in the shape of a 7. The reflective film 2 and the light guide plate 3 are both flat plates, and both are located behind the plate body 1-1 of the iron frame 1, and are stacked and fixed on the plate body 1-1 of the iron frame 1 in sequence. The small white strip 4, the light bar 5 and the light bar double-sided adhesive tape 6 are all in the shape of long strips, and the small white strip 4 and the light bar double-sided adhesive tape 6 are respectively adhered to the front and rear sides of the light bar 5. The light bar 5 is arranged at the upper edge of the plate body 1-1 of the iron frame 1. The glue frame 7 is in the shape of a square, and an embedding groove is provided at the edge of the glue 7-1 of the glue frame 7. The plastic frame 7 is relatively buckled with the iron frame 1, and the hook structure of the frame 1-2 of the iron frame 1 is embedded in the embedding groove of the colloid 7-1 of the plastic frame 7. A gap of 0.1mm to 0.15mm is left between the lower surface of the hook structure of the frame 1-2 of the iron frame 1 and the upper surface of the embedding groove of the colloid 7-1 of the plastic frame 7. The diffusion film 8, the lower brightness enhancement film 9 and the upper brightness enhancement film 10 are all flat plates. The three are located behind the plastic frame 7 and are stacked and fixed on the light guide plate 3 in sequence. The light shielding glue 11 is in the shape of a square, and is located behind the upper brightness enhancement film 10 and fixed at the edge of the upper brightness enhancement film 10.

[0015] The utility model makes the upper end of the frame 1-2 of the iron frame 1 present a hook structure, and opens an embedding groove at a position corresponding to the edge of the colloid 7-1 of the plastic frame 7, and realizes the relative buckling of the iron frame 1 and the plastic frame 7 through the hook structure and the embedding groove. Since a certain gap is left between the hook structure and the embedding groove, the deformation of the plastic frame 7 varies within the range of the gap, and the deformation of the plastic frame 7 in a small range will not cause backlight leakage, nor will it affect the brightness uniformity, thereby achieving the purpose of improving light leakage.

[0016] It should be noted that although the embodiments described above are illustrative, they are not limitations of the present invention, and therefore the present invention is not limited to the above specific embodiments. Without departing from the principles of the present invention, any other embodiments obtained by those skilled in the art under the inspiration of the present invention are deemed to be within the protection of the present invention.

Claims

1. An ultra-thin medium-sized backlight module for improving light leakage, comprising an iron frame (1), a reflective film (2), a light guide plate (3), a small white strip (4), a light strip (5), a light strip double-sided adhesive tape (6), an adhesive frame (7), a diffusion film (8), a lower light enhancement film (9), an upper light enhancement film (10) and a light shielding adhesive (11); wherein: The upper end of the frame (1-2) of the iron frame (1) is in a hook structure, and an embedding groove is provided on the edge of the colloid (7-1) of the rubber frame (7). The hook structure of the frame (1-2) of the iron frame (1) is embedded in the embedding groove of the colloid (7-1) of the rubber frame (7).

2. The ultra-thin medium-sized backlight module with improved light leakage according to claim 1, characterized in that: A gap is left between the lower surface of the hook structure of the frame (1-2) of the iron frame (1) and the upper surface of the embedding groove of the colloid (7-1) of the rubber frame (7).

3. The ultra-thin medium-sized backlight module with improved light leakage according to claim 2, characterized in that: The height of the gap between the lower surface of the hook structure of the frame (1-2) of the iron frame (1) and the upper surface of the embedding groove of the colloid (7-1) of the rubber frame (7) is between 0.1 mm and 0.15 mm.

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