Display screen backlight structure

Abstract

The utility model provides a display screen backlight structure which comprises a shell, a display screen, a diffusion plate, a light guide structure and a light source, and the shell is provided with an inner cavity with an opening in one side; the display screen is arranged at the opening of the shell; the diffusion plate is connected to the opening of the shell and is positioned around the display screen; the light guide structure is located in the inner cavity, and the light guide structure extends outwards from the inner cavity to the diffusion plate; the light source is located in the inner cavity and arranged on the light guide structure. Incident light of the light source enters the light guide structure, and the light is reflected in the light guide structure, then irradiates the diffusion plate and is diffused and emitted from the diffusion plate. According to the utility model, the number of LEDs is greatly reduced, and the emitted light is more uniform.

Description

Technical Field

[0001] The utility model relates to the field of display screen lighting, in particular to a display screen backlight structure, and in particular to a display screen periphery backlight structure. Background Art

[0002] Please refer to Figure 1. As shown in Figure 1(a) and Figure 1(b), the backlight structure of the existing display screen periphery includes a housing, a display screen, a diffuser plate and LED lights. The LED lights 100 are arranged around the display screen 200. The LEDs directly illuminate the diffuser plate 300, and the light is diffused by the diffuse reflective material on the light-emitting surface of the diffuser plate to form a lighting effect. In the existing solution, in order to ensure that the entire periphery is fully illuminated, multiple LED lights need to be arranged at the edge, which requires a large number of LED lights. In addition, since the LED lights are close to the light-emitting surface, the overall light uniformity of the light-emitting surface is poor, which also makes the overall light uniformity of the display screen poor.

[0003] Therefore, it is necessary to provide a new technical solution. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art, the present invention discloses a display screen backlight structure, which greatly reduces the number of LEDs and emits more uniform light. The specific technical solution is as follows:

[0005] The utility model provides a display screen backlight structure, which includes a housing, a display screen, a diffusion plate, a light guide structure and a light source.

[0006] The shell has an inner cavity with an opening on one side;

[0007] The display screen is arranged at the opening of the housing;

[0008] The diffusion plate is connected to the opening of the housing and is located around the display screen;

[0009] The light guide structure is located in the inner cavity, and the light guide structure extends outward from the inner cavity to the diffuser plate;

[0010] The light source is located in the inner cavity and is arranged on the light guide structure;

[0011] The incident light from the light source enters the light guide structure, is reflected in the light guide structure, and is irradiated onto the diffusion plate and then diffused and emitted from the diffusion plate.

[0012] Furthermore, the light guide structure is a light guide plate, which has a bottom plate and a side plate integrally connected to the bottom plate, the bottom plate is parallel to the bottom wall of the shell, and there is a accommodating space between the bottom plate and the bottom wall of the shell, the side plate is parallel to the side wall of the shell, the light source is connected to the light guide plate and is located in the accommodating space, and the side plate extends along the side wall of the shell to the diffuser.

[0013] Furthermore, a conical groove is provided on one side of the bottom plate near the opening, the notch of the conical groove faces the opening, the light source is provided on the other side of the bottom plate, and the central axis of the light source coincides with the central axis of the conical groove.

[0014] The tapered groove is configured to reflect part of the incident light from the light source into light parallel to the bottom plate and then reflect it to the side plate.

[0015] Furthermore, the light guide plate and the diffuser plate are an integrated structure.

[0016] Furthermore, the light guide structure is a reflective space surrounded by the housing, the diffuser plate and the reflector plate.

[0017] The light source is located in the reflection space. The incident light of the light source is reflected multiple times by the reflection plate and the inner wall of the shell in the reflection space. The multiple reflected light is incident on the diffusion plate and emitted from the diffusion plate.

[0018] Furthermore, the reflective plate includes a reflective bottom plate and a reflective side plate, the reflective bottom plate is parallel to the bottom wall of the shell, the reflective side plate is parallel to the side wall of the shell, and the light source is connected to the bottom wall of the shell, or the light source is arranged close to the bottom wall of the shell.

[0019] Furthermore, a conical convex groove is formed at the center of the reflective bottom plate, and the conical convex groove is formed by protruding from the reflective bottom plate toward the bottom wall of the shell, the notch of the conical convex groove faces the opening, and the central axis of the light source coincides with the central axis of the conical convex groove.

[0020] The conical convex groove is configured to reflect part of the incident light from the light source into light parallel to the reflective bottom plate and then reflect it to the side wall of the housing.

[0021] Furthermore, in the reflection space, a white material layer or an aluminum layer is provided on the inner wall of the shell, and a white material layer or an aluminum layer is provided on the reflection plate.

[0022] Furthermore, the diffuser plate has an incident surface and a light-emitting surface. The incident light from the light source enters the light-guiding structure, is reflected in the light-guiding structure, enters the diffuser plate from the incident surface, and then is evenly diffused and emitted through the light-emitting surface.

[0023] Furthermore, the light source is a single LED light source.

[0024] The utility model has the following beneficial effects:

[0025] (1) Compared with the prior art multi-LED lighting solution, the present invention can reduce the number of LEDs and lower costs.

[0026] (2) The utility model guides light through a light guide plate, and the light distribution is more uniform, and the overall illumination effect is better.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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 use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] FIG1( a ) is a schematic diagram of a peripheral backlight structure of a display screen in the prior art;

[0030] Figure 1(b) is a cross-sectional view taken along the line A in Figure 1(a);

[0031] FIG2( a ) is a schematic diagram of a display screen backlight structure according to an embodiment of the present invention;

[0032] Figure 2(b) is a cross-sectional view taken along line B of Figure 2(a);

[0033] Figure 3 This is a schematic diagram of light direction in an embodiment of the display screen backlight structure of the present invention;

[0034] Figure 4 This is a schematic structural diagram of the display screen backlight structure of another embodiment of the present invention;

[0035] Figure 5 This is a structural diagram of a display screen backlight structure in yet another embodiment of the present invention.

[0036] Among them, 1-housing, 11-housing bottom plate, 12-housing side plate, 2-display screen, 3-diffuser plate, 31-incident surface, 32-light-emitting surface, 4-light guide plate, 41-light guide bottom plate, 42-light guide side plate, 43-conical groove, 5-light source, 6-accommodating space, 7-reflection plate, 71-reflection bottom plate, 72-reflection side plate, 8-reflection space, 9-conical convex groove. DETAILED DESCRIPTION

[0037] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0039] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, the connection may be fixed, detachable, or integrated; it may be mechanical or electrical; it may be directly connected or indirectly connected through an intermediate medium; it may refer to internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0040] See also Figures 2(a) to 5 FIG2(a) is a schematic structural diagram of a display screen backlight structure according to an embodiment of the present invention; FIG2(b) is a cross-sectional view taken along the line B of FIG2(a); Figure 3 This is a schematic diagram of light direction in an embodiment of the display screen backlight structure of the present invention; Figure 4 This is a schematic structural diagram of another embodiment of the display screen backlight structure of the present invention. Figure 5 This is a structural diagram of a display screen backlight structure in yet another embodiment of the present invention.

[0041] See also Figures 2(a) to 3 In this embodiment, the display screen backlight structure includes a housing 1, a display screen 2, a diffusion plate 3, a light guide structure and a light source 5. In this embodiment, the light guide plate 4 serves as the light guide structure.

[0042] The housing 1 has an inner cavity with one side open. The housing 1 has a housing bottom plate 11 and a housing side plate 12 extending obliquely outward from the periphery of the housing bottom plate 11. Preferably, the housing bottom plate 11 and the housing side plate 12 are integrally provided.

[0043] The display screen 2 is arranged at the opening of the housing 1 .

[0044] The diffuser plate 3 is connected to the opening of the housing 1 and is positioned around the display screen 2. The diffuser plate 3 has an incident surface 31 and a light-emitting surface 32. The incident surface 31 faces the interior of the cavity, while the light-emitting surface 32 faces the exterior of the opening. After being reflected within the light guide plate 4, light enters the diffuser plate 3 from the incident surface 31 and is evenly diffused from the light-emitting surface 32.

[0045] The light guide plate 4 is located in the inner cavity, and the light guide plate 4 has a light guide bottom plate 41 and a light guide side plate 42 integrally connected to the light guide bottom plate 41. The light guide bottom plate 41 is parallel to the bottom wall of the outer shell, and there is a accommodating space 6 between the light guide bottom plate 41 and the bottom wall of the outer shell. The light guide side plate 42 is parallel to the side wall of the outer shell. The light source 5 is connected to the light guide plate 4 and is located in the accommodating space 6. The light guide side plate 42 extends along the side wall of the outer shell to the incident surface 31 of the diffuser.

[0046] Furthermore, a conical groove 43 is provided on one side of the center of the light-guiding bottom plate 41 close to the opening, and the notch of the conical groove 43 faces the opening. The light source 5 is provided on the other side of the bottom plate 42, and the central axis of the light source 5 coincides with the central axis of the conical groove 43. The conical groove 43 is configured to reflect part of the incident light from the light source 5 into light parallel to the light-guiding bottom plate 41 and then reflect it to the light-guiding side plate 42. The utility model places the light source 5 directly opposite the tip of the conical groove 43 so that part of the light emitted by the light source 5 can be evenly irradiated onto the conical surface between the tip and the notch of the conical groove 43. The light irradiated onto the conical groove 43 will be evenly reflected onto the light-guiding side plates 42 on both sides of the conical groove, thereby changing the propagation direction of the light. The light can be directly reflected onto the light-guiding side plates, thereby ensuring the propagation intensity of the light in the light-guiding side plates, and ultimately improving the luminous effect of the diffuser plate. Moreover, since the light source is far away from the luminous surface, the light emitted from the diffuser plate is more uniform, forming a uniform illumination effect.

[0047] The light source 5 is a single LED light source. The utility model combines one LED with a light guide plate to evenly distribute light to the light-emitting surface, greatly reducing the number of LEDs and making the light emitted more uniform.

[0048] like Figure 3 As shown, Figure 3The dotted line in the figure represents the direction of part of the light. The incident light from the light source 5 enters the light guide plate 4. Part of the light is reflected by the tapered groove 43 in the light guide plate 4 and becomes parallel to the bottom plate, irradiating the light guide side plate 42. The other part of the light enters the light guide side plate 42 after being reflected back and forth in the light guide bottom plate 41. The light entering the light guide side plate 42 is then reflected back and forth in the light guide side plate 42 and irradiates the diffuser 3, and is evenly emitted from the light-emitting surface 32 of the diffuser. In this application, by placing the light source farther away from the light-emitting surface, the light emitted by the light source enters the diffuser after multiple reflections in the light guide plate. The light emitted from the diffuser is more uniform, resulting in a uniform illumination effect.

[0049] See also Figure 4 In this embodiment, the light guide plate 4 and the diffuser plate 3 are an integrated structure.

[0050] See also Figure 5 In this embodiment, the display backlight structure includes a housing 1, a display 2, a diffusion plate 3, a light guide structure and a light source 5. Figures 2(a) to 3 Unlike the embodiment, in this embodiment, a reflective plate 7 replaces the light guide plate. The light guide structure of this embodiment is a reflective space 8 enclosed by the housing 1, the diffuser 3, and the reflective plate 7. The light source 5 is located within the reflective space 8. The incident light from the light source 5 is reflected multiple times within the reflective space 8 by the reflective plate 7 and the inner wall of the housing. The multiple reflected light is then incident on the diffuser plate and emitted from the diffuser plate.

[0051] Furthermore, the reflective plate 7 includes a reflective bottom plate 71 and reflective side plates 72. The reflective bottom plate 71 is parallel to and opposite to the bottom wall of the housing, and the reflective side plates 72 are parallel to and opposite to the side walls of the housing. The light source 5 is connected to the center of the bottom wall of the housing, or the light source 5 is arranged close to the bottom wall of the housing. Light emitted by the light source 5 is directly reflected in the reflective space 8.

[0052] Furthermore, a conical convex groove 9 is formed at the center of the reflective base plate 71. The conical convex groove 9 protrudes from the reflective base plate 71 toward the bottom wall of the housing. The notch of the conical convex groove 9 is open, and the central axis of the light source 5 coincides with the central axis of the conical convex groove 9. The conical convex groove 9 is configured to reflect a portion of the incident light from the light source 5 into light parallel to the reflective base plate 71 and then reflect it toward the side wall of the housing. By positioning the light source 5 directly opposite the tip of the conical convex groove 9, the utility model allows a portion of the light emitted by the light source to be evenly illuminated on the conical surface between the tip and the notch of the conical convex groove 9. The light irradiated by the conical convex groove 9 is reflected parallel to the reflective base plate 71 and evenly distributed to both sides, thereby changing the propagation direction of the light and allowing the light to be directly reflected toward the side wall of the housing. This ensures the intensity of the light incident on the diffuser plate 3 from the reflective space 8 and improves the luminous effect of the diffuser plate. Moreover, because the light source is farther away from the luminous surface, the light emitted from the diffuser plate is more uniform, resulting in a uniform illumination effect.

[0053] Furthermore, within the reflective space 8, a white material layer or aluminum layer (not shown) is provided on the inner wall of the housing, and a white material layer or aluminum layer (not shown) is provided on the reflective plate. This allows the LED light to be reflected multiple times on the reflective plate 7 and the housing 1, preventing light attenuation and improving the reflection effect, ultimately irradiating the light-emitting surface to form a uniform lighting effect.

[0054] Compared with the common multi-LED lighting solution, the utility model can reduce the number of LEDs and reduce costs. The utility model guides light through the light guide structure, and the light distribution is more uniform, and the overall illumination effect is better.

[0055] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify and modify the above embodiments within the scope of the present invention.

Claims

1. A display backlight structure, characterized in that: It comprises a housing (1), a display screen (2), a diffusion plate (3), a light guide structure and a light source (5). The housing (1) has an inner cavity with an opening on one side; The display screen (2) is arranged at the opening of the housing; The diffusion plate (3) is connected to the opening of the housing and is located around the display screen (2); The light guide structure is located in the inner cavity, and the light guide structure extends outward from the inner cavity to the diffuser plate (3); The light source (5) is located in the inner cavity and is arranged on the light guide structure; The incident light from the light source enters the light guide structure, is reflected in the light guide structure, and is irradiated onto the diffusion plate and then diffused and emitted from the diffusion plate.

2. The display backlight structure according to claim 1, wherein: The light guide structure is a light guide plate (4), the light guide plate (4) having a light guide bottom plate (41) and a light guide side plate (42) integrally connected to the light guide bottom plate (41), the light guide bottom plate (41) being parallel to and opposite to the bottom wall of the shell, and a receiving space (6) being provided between the light guide bottom plate (41) and the bottom wall of the shell, the light guide side plate (42) being parallel to and opposite to the side wall of the shell, the light source being connected to the light guide plate (4) and being located in the receiving space (6), and the light guide side plate (42) extending along the side wall of the shell to the diffuser plate (3).

3. The display backlight structure according to claim 2, wherein: A conical groove (43) is provided on one side of the center of the light guide base plate (41) close to the opening, the notch of the conical groove (43) faces the opening, the light source (5) is provided on the other side of the light guide base plate (41), and the central axis of the light source (5) coincides with the central axis of the conical groove (43). The tapered groove is configured to reflect part of the incident light from the light source into light parallel to the bottom plate and then reflect it to the side plate.

4. The display backlight structure according to claim 2, wherein: The light guide plate (4) and the diffusion plate (3) are an integrated structure.

5. The display backlight structure according to claim 1, wherein: The light-guiding structure is a reflection space (8) enclosed by the housing (1), the diffusion plate (3) and the reflection plate (7). The light source (5) is located in a reflection space (8), and the incident light of the light source is reflected multiple times by the reflection plate and the inner wall of the shell in the reflection space, and the multiple reflected light is incident on the diffusion plate and emitted from the diffusion plate.

6. The display backlight structure according to claim 5, characterized in that: The reflective plate (7) comprises a reflective bottom plate (71) and a reflective side plate (72), wherein the reflective bottom plate (71) is parallel to and opposite to the bottom wall of the housing, and the reflective side plate (72) is parallel to and opposite to the side wall of the housing, and the light source (5) is connected to the bottom wall of the housing, or the light source is arranged close to the bottom wall of the housing.

7. The display backlight structure according to claim 6, wherein: A conical convex groove (9) is formed at the center of the reflective bottom plate. The conical convex groove (9) is formed by protruding from the reflective bottom plate (71) toward the bottom wall of the housing. The notch of the conical convex groove (9) faces the opening. The central axis of the light source (5) coincides with the central axis of the conical convex groove (9). The conical convex groove is configured to reflect part of the incident light from the light source into light parallel to the reflective bottom plate and then reflect it to the side wall of the housing.

8. The display backlight structure according to claim 5, characterized in that: In the reflection space (8), a white material layer or an aluminum layer is provided on the inner wall of the shell, and a white material layer or an aluminum layer is provided on the reflection plate (7).

9. The display backlight structure according to claim 1, wherein: The diffusion plate (3) has an incident surface (31) and a light-emitting surface (32). The incident light of the light source enters the light-guiding structure, and after being reflected in the light-guiding structure, the light enters the diffusion plate from the incident surface (31) and is evenly diffused and emitted through the light-emitting surface (32).

10. The display backlight structure according to claim 1, wherein: The light source (5) is a single LED light source.

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