Vehicle-mounted backlight source narrow frame bright line eliminating structure

Abstract

The utility model discloses a vehicle-mounted backlight source narrow frame bright line eliminating structure which comprises an iron frame, an installation position used for installing a light guide assembly is formed on the iron frame, a light source assembly is arranged on the outer edge of the light guide assembly, and a shielding plate horizontally extending towards the installation position is arranged in the circumference direction of the iron frame. The shielding plate covers the upper surface of the outer edge of the light guide assembly, a gap is formed between the shielding plate and the light guide assembly, the position, at least corresponding to the upper surface of the light guide assembly, of the shielding plate is provided with a first black coating, the first black coating is arranged on the bottom face of the shielding part, yellow or other small stray light overflowing out of the light guide plate is absorbed, and the light cannot be reflected; therefore, the problems of edge yellowing and bright line generation are solved; by means of the structure, the problem of color difference of the lamp socket can be solved on the premise that the structure of the backlight source is not changed, normal assembly of the backlight source is not affected due to the fact that the component structure of the backlight source is not changed, mold opening and customization of accessories are not needed, and manufacturing cost is reduced to the minimum.

Description

Technical Field

[0001] The utility model belongs to the technical field of backlights, and specifically relates to a narrow-frame bright line elimination structure for vehicle-mounted backlights. Background Art

[0002] In the prior art, the backlight module of a display screen generally includes components such as a display panel, a light guide plate, a back plate, and a reflective sheet. For the company's mature products, generally no major changes will be made to its interior to avoid unexpected problems, otherwise it will be more harmful than beneficial. However, for existing backlights, there are inevitably some problems that affect the experience. The specific problems are as follows:

[0003] 1. As the screen-to-body ratio (visible area) becomes larger and larger, the distance from the lamp to the visible area becomes smaller and smaller, resulting in bright lines appearing at the edge of the frame.

[0004] 2. Because the LED has yellow phosphor and the yellow light has strong penetration, if the distance from the lamp to the visible area is close, the lamp mouth end will show a yellowing phenomenon when viewed.

[0005] Especially for vehicle-mounted displays, the driver usually views the display screen from the side, and the above problems are more prominent at such an angle. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a narrow-frame bright line elimination structure for vehicle-mounted backlights to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A narrow-frame bright line elimination structure for vehicle-mounted backlights includes an iron frame. An installation position for installing a light guide assembly is formed on the iron frame. A light source assembly is provided on the outer edge of the light guide assembly. A baffle plate extending horizontally towards the installation position is provided along the circumference direction of the iron frame. The baffle plate covers the upper surface of the outer edge of the light guide assembly, and there is a gap between them. The baffle plate is provided with a first black coating at least at the position corresponding to the upper surface of the light guide assembly.

[0009] A further technical solution is that the length of the baffle plate is 0.5 mm - 10 mm.

[0010] A further technical solution is that the iron frame includes a bottom frame and an upper frame. An inverted buckle is provided on the outside of the bottom frame. The upper frame includes a connecting portion integrally formed with the baffle plate, and the connecting portion is provided with a clamping hole cooperating with the inverted buckle.

[0011] According to a further technical solution, the light guide assembly includes a reflector plate, a light guide plate and a panel assembly installed in sequence from bottom to top, the side of the light guide plate corresponds to the light source assembly, there is a gap between the portion of the side of the light guide plate that exposes the light source assembly and the bottom frame, and a black coating 2 is provided at the gap.

[0012] According to a further technical solution, the second black coating is at least formed on the surface of the iron frame shell close to the gap.

[0013] According to a further technical solution, the light source assembly includes a light-homogenizing plate arranged along the side of the light guide plate, the light-homogenizing plate and the side of the light guide plate form a concave-convex fixing structure, and lamp beads are installed at the concave-convex fixing structure.

[0014] Beneficial effects of the utility model:

[0015] The utility model provides a black coating on the bottom surface of the shielding piece to absorb the yellow or other small amount of stray light overflowing from the light guide plate, making it unable to reflect light, thereby solving the problem of yellowing edges and bright lines. The structure of the utility model can improve the color difference of the lamp socket without changing the structure of the backlight source. Since the component structure is not changed, the normal assembly of the backlight source will not be affected, and there is no need to re-open the mold and customize the accessories, thereby reducing the manufacturing cost to a minimum.

[0016] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 : A three-dimensional structural diagram of the utility model.

[0018] Figure 2 : Partial three-dimensional section of the utility model Figure 1 .

[0019] Figure 3 : Partial three-dimensional section of the utility model Figure 2 .

[0020] Figure 4 : The light guide plate and light source assembly structure of the utility model.

[0021] Figure markings: 11-bottom frame, 12-upper frame, 121-shielding plate, 122-connecting part, 131-undercut, 132-card hole, 14-black coating one, 15-black coating two, 2-light guide assembly, 21-reflection plate, 22-light guide plate, 23-panel assembly, 3-light source assembly, 31-diffuser plate, 32-concave and convex fixing structure, 33-lamp beads. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0023] Please refer to Figures 1-4 ;

[0024] The present utility model aims to improve the problems of bright lines and color difference existing in the border position. Specifically, it includes an iron frame. An installation position for installing the light guide component 2 is formed on the iron frame. A light source component 3 is provided on the outer edge of the light guide component 2. A baffle 121 extending horizontally towards the installation position is provided along the circumference direction of the iron frame. The baffle 121 covers the upper surface of the outer edge of the light guide component 2, and there is a gap between them. Preferably, the length of the baffle 121 is 0.5 mm - 10 mm, covering the edge parts of the light source component 3 and the light guide component 2 and being as close as possible to the light source component 3 to achieve a larger screen-to-body ratio. At least a black coating 14 is provided at the position corresponding to the upper surface of the light guide component 2 on the baffle 121; it should be noted that according to the requirements of customers for the color of the outer surface of the iron frame, the color of its outer surface cannot be changed, and it is also difficult to change the color of the iron frame metal. The most common method is painting, but the paint surface will increase the thickness and may cause the situation of inability to assemble. Therefore, in this embodiment, partial electroplating or silk printing is used to achieve this, which will not affect its outer color. The inner side of the iron frame can be entirely provided with a coating, or the corresponding part can be provided with a coating, as long as the edge of the light guide component 2 can be covered;

[0025] In addition, this gap is formed due to the dimensional limitations of various parts in the prior art and is inevitable. Due to the tolerances of each part, it is impossible to set them completely tightly, and a certain space needs to be reserved for assembly. After the light source component 3 emits light to the light guide component 2, the light guide plate 22 emits light. The part of the light guide plate 22 corresponding to the gap will directly irradiate the light onto the bottom surface of the baffle 121, and the baffle 121 will reflect this light;

[0026] Since the yellow light has strong penetration, more yellow light will pass through the light guide component 2 to reach the bottom surface of the baffle 121 and then be reflected back into the light guide component 2 again, which will cause the problem of yellowing at the edge at this time; by providing a black coating 14 on the bottom surface of the baffle, the yellow or other small amounts of stray light overflowing from the light guide plate 22 is absorbed so that it cannot reflect light, thereby solving the situation of yellowing at the edge and generating bright lines; through the structure of the present utility model, the problem of color difference at the lamp socket can be improved without changing the structure of the backlight source. Since its component structure is not changed, it will not affect the normal assembly of the backlight source, nor is it necessary to re-open the mold for customization of accessories, reducing the manufacturing cost to the lowest.

[0027] In the embodiment of the present utility model, the iron frame includes a bottom frame 11 and an upper frame 12. An inverted buckle 131 is provided on the outer side of the bottom frame 11. The upper frame 12 includes a connecting portion 122 integrally formed with a shielding plate 121. The connecting portion 122 is provided with a clamping hole 132 that cooperates with the inverted buckle 131. As can be seen from the cross-section, the connecting portion 122 and the shielding plate 121 form an inverted "L" structure, while the outer edge of the bottom frame 11 is in an "L" structure. The inverted buckle 131 and the clamping hole 132 are also provided on one side. In the initial state, the bottom frame 11 and the upper frame 12 are in a separated state. Then, the light guide assembly 2 is fixed on the bottom frame 11. Finally, the upper frame 12 is buckled and fixed to the bottom frame 11 to complete the installation, which is convenient and fast and improves production efficiency.

[0028] In the embodiment of the present utility model, the light guide assembly 2 includes a reflection plate 21, a light guide plate 22, and a panel assembly 23 that are sequentially installed from bottom to top. The side of the light guide plate 22 corresponds to the light source assembly 3. It should be noted that usually the light source assembly 3 is a lamp bead 33, which cannot completely cover the side of the light guide plate 22. Therefore, there will be an exposed situation. There is a gap between the exposed part of the side of the light guide plate 22 where the light source assembly 3 is located and the bottom frame 11. A second black coating 15 is provided at the gap. In this embodiment, there are two setting methods for the second black coating 15. Specifically, it can be set on the bottom surface of the light guide plate 22 or on the surface of the outer frame of the iron frame. If the former is adopted, the range of the coating needs to be precisely controlled, otherwise it will affect the light guide effect. For example, if the coating area extends to the reflection plate 21, the reflected light will be affected at this time, and the light-emitting effect of the backlight will be affected instead. Moreover, the second black layer will also absorb the light inside the light guide plate 22, resulting in dimming. If the latter is adopted, the position of the coating does not need to be precisely controlled, and it will only absorb the overflowing light and will not affect the brightness of the light guide plate 22. It only needs to cover the position of the gap. Therefore, it is preferably used that the second black coating 15 is at least formed on the surface of the iron frame housing close to the gap.

[0029] Since the yellow light has strong penetrability, more yellow light will pass through the light guide plate 22 and reach the surface of the iron frame, and then be reflected into the light guide plate 22 again. At this time, the problem of yellowing at the edge will occur.

[0030] By providing a second black coating 15 on the inner surface of the iron frame, the yellow or other small amounts of stray light that overflow from the light guide plate 22 are absorbed, so that they cannot reflect light, thereby solving the situation of yellowing at the edge and generating bright lines. Through the structure of the present utility model, the problem of color difference at the lamp socket can be improved without changing the structure of the backlight. Since the component structure is not changed, the normal assembly of the backlight will not be affected, and there is no need to re-open the mold for customization of the accessories, reducing the manufacturing cost to the lowest.

[0031] It should be noted that the above-mentioned embodiments mention that there are tolerances between the accessories. Therefore, the size of the gap cannot be determined, and it is impossible to cover the gap with standard accessories. If standard accessories are used, when the tolerance between the accessories is large, the gap cannot be completely covered; when the tolerance between the accessories is small, the standard accessories cannot be assembled. However, the above problems do not exist when using the coating method.

[0032] In the embodiment of the present invention, the light source assembly 3 includes a light homogenizing plate 31 arranged along the side of the light guide plate 22. An uneven fixing structure 32 is formed between the light homogenizing plate 31 and the side of the light guide plate 22, and the lamp beads 33 are installed at the uneven fixing structure 32.

[0033] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0034] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A structure for eliminating bright lines in a narrow frame of a vehicle backlight source, characterized in that: The invention comprises an iron frame, on which a mounting position for mounting a light guide component (2) is formed, a light source component (3) is arranged at the outer edge of the light guide component (2), a shielding plate (121) is arranged along the circumference direction of the iron frame and extends horizontally toward the mounting position, the shielding plate (121) covers the upper surface of the outer edge of the light guide component (2) and a gap is provided between the shielding plate (121), and a black coating (14) is arranged at least at a position corresponding to the upper surface of the light guide component (2).

2. The structure for eliminating bright lines in narrow borders of a vehicle-mounted backlight source according to claim 1, characterized in that: The shielding plate (121) has a length of 0.5 mm to 10 mm.

3. The structure for eliminating bright lines in narrow borders of a vehicle-mounted backlight source according to claim 1, characterized in that: The iron frame comprises a bottom frame (11) and an upper frame (12); an undercut (131) is provided on the outer side of the bottom frame (11); the upper frame (12) comprises a connecting portion (122) integrally formed with the shielding plate (121); and the connecting portion (122) is provided with a clamping hole (132) matched with the undercut (131).

4. The structure for eliminating bright lines in narrow borders of a vehicle-mounted backlight source according to claim 1, characterized in that: The light guide assembly (2) comprises a reflector (21), a light guide plate (22) and a panel assembly (23) which are installed in sequence from bottom to top; the side of the light guide plate (22) corresponds to the light source assembly (3); there is a gap between the portion of the side of the light guide plate (22) where the light source assembly (3) is exposed and the bottom frame (11); a second black coating (15) is provided at the gap.

5. The structure for eliminating bright lines in narrow borders of vehicle-mounted backlight sources according to claim 4, characterized in that: The second black coating (15) is at least formed on the surface of the iron frame shell close to the gap.

6. The structure for eliminating bright lines in narrow borders of a vehicle-mounted backlight source according to claim 4, characterized in that: The light source assembly (3) comprises a light homogenizing plate (31) arranged along the side of the light guide plate (22), the light homogenizing plate (31) and the side of the light guide plate (22) forming a concave-convex fixing structure (32), and a lamp bead (33) being installed at the concave-convex fixing structure (32).

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