Reflection structure for regional dimming backlight

Abstract

The utility model discloses a reflection structure for regional dimming backlight, which comprises a circuit substrate and a plurality of LED lamps arranged on the circuit substrate, each LED lamp is covered with a lampshade, and the lampshade is used for separating two adjacent LED lamps. The backlight reflection structure is provided with the lampshade to separate the two adjacent LED lamps, so that the light-emitting angles of the LED lamps are within the range of the lampshade, and the effect of the adjacent LED lamps is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight, in particular to a reflection structure for area dimming backlight. Background Technique

[0002] In recent years, with the development of flat panel display technology, liquid crystal displays have become a major type of display in the current flat panel display field. As a non-self-luminous display device, a liquid crystal display requires a backlight module as a light source. Direct-lit and edge-lit are two mainstream backlight forms in the current market. Area dimming backlight divides the LCD backlight into many small areas (Blocks). During operation, according to the grayscale of the content corresponding to the liquid crystal display in the corresponding small area, the brightness of the backlight is adjusted to achieve the purpose of energy saving and enhanced image quality. Therefore, each area is independent of each other, but if there is no barrier between the areas, light leakage between the areas will occur and the ideal area brightness cannot be achieved. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a reflection structure for area dimming backlight.

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

[0005] A reflection structure for area dimming backlight, comprising: a circuit board and a plurality of LED lights arranged on the circuit board, and a lamp cover is sleeved on each LED light, and the lamp cover is used to separate two adjacent LED lights.

[0006] In one embodiment, the plurality of LED lights are arranged in a rectangular array on the circuit board.

[0007] In one embodiment, each LED light forms a light-emitting area, and each light-emitting area is independent of each other.

[0008] In one embodiment, the lamp cover is rectangularly arranged, the lamp cover is hollow and has an open end, the open end of the lamp cover faces upward and is sleeved outside the LED light, a through hole is opened at the bottom end of the lamp cover, the through hole is opened at a position relative to the LED light, and the LED light is accommodated in the lamp cover through the through hole.

[0009] In one embodiment, the size of the through hole is larger than the size of the LED light, and the light emitted by the LED light enters the lamp cover through the through hole and exits through the open end of the lamp cover.

[0010] In one embodiment, the inner cross-section of the lamp cover is semicircularly arranged, and the inner part of the lamp cover is provided with a three-dimensional arc chamfer at each of the four corners.

[0011] In one embodiment, the light-emitting angle of the lamp cover is within the light-emitting area, and the light-emitting angle of the LED lamp is concentrated within the range of the lamp cover.

[0012] In one embodiment, the size of the lamp cover is adapted to the size of the light-emitting area, and the mutually facing sides between adjacent lamp covers are in contact.

[0013] In one embodiment, a reflective layer for enhancing light reflection is provided on the inner wall of the lamp cover.

[0014] In one embodiment, the reflective layer is a reflective film with a reflectivity greater than 90%, and the reflective film is attached to the inner wall of the lamp cover.

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

[0016] 1. In a reflection structure for area dimming backlight of the present utility model, a lamp cover is provided over each LED lamp. The lamp cover serves to separate adjacent light-emitting areas. The light emitted by the LED lamp enters the lamp cover through the through-hole and is reflected by the inner wall of the lamp cover to the upper opening of the lamp cover for emission. The lamp cover concentrates the light-emitting angle of the LED lamp within the light-emitting area, so that the light emission of the LED lamp does not affect adjacent LED lamps.

[0017] 2. In a reflection structure for area dimming backlight of the present utility model, a reflection is provided on the inner wall of the lamp cover to improve the light reflectivity of the light entering the lamp cover from the LED lamp, thereby increasing the utilization rate of light. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 will be briefly introduced below.

[0019] Figure 1 It is a schematic structural diagram of a reflection structure for area dimming backlight provided by the present utility model;

[0020] Figure 2 It is a schematic cross-sectional structural diagram of a reflection structure for area dimming backlight provided by the present utility model;

[0021] Figure 3 It is a schematic structural diagram of the lamp cover in a reflection structure for area dimming backlight provided by the present utility model.

[0022] BRIEF DESCRIPTION OF THE DRAWINGS: 10. Circuit board; 20. LED lamp; 30. Lamp cover; 31. Opening; 32. Through-hole; 40. Light-emitting area; 50. Reflective layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings.

[0024] A reflection structure for area dimming backlight, referring to Figure 1 , includes a circuit board 10 and a plurality of LED lights 20 disposed on the circuit board 10. The LED lights 20 are used to generate light sources, and the circuit board 10 is used to integrate the circuits of the plurality of LED lights 20. The plurality of LED lights 20 are distributed in a rectangular array on the circuit board 10. Each LED light 20 forms a light-emitting area 40, and the plurality of light-emitting areas 40 emit light to adjust the brightness and darkness of the backlight.

[0025] Referring to Figure 1 , since each light-emitting area 40 is independent of each other, but there is no barrier set between the light-emitting areas 40, the maximum light-emitting angle of the LED lights 20 in each light-emitting area 40 can reach 160 degrees. When the LED lights 20 emit light, the light will enter the adjacent light-emitting area 40, resulting in light crosstalk. Therefore, a lamp cover 30 is provided outside each LED light 20. The lamp cover 30 is used to block adjacent two LED lights 20, so that each light-emitting area 40 is independent of each other, and the lamp cover 30 will not affect the normal light emission of the LED lights 20.

[0026] Referring to Figure 1 and Figure 2 , the lamp cover 30 is arranged in a rectangle, the lamp cover 30 is hollow and has an opening 31 at one end, and the opening 31 end of the lamp cover 30 is upwardly sleeved outside the LED light 20. A through hole 32 is opened at the bottom end of the lamp cover 30. The through hole 32 is opened relative to the position of the LED light 20, and the through hole 32 is arranged opposite to the LED light 20. The LED light 20 is accommodated in the lamp cover 30 through the through hole 32, and the light emitted by the LED light 20 can enter the lamp cover 30 through the through hole 32 above it and then be emitted through the upper opening 31 of the lamp cover 30.

[0027] Furthermore, referring to Figure 1 and Figure 2 , the size of the through hole 32 is larger than the size of the LED light 20, so that the lamp cover 30 will not affect the normal light emission of the LED lights 20.

[0028] Referring to Figure 3 , the inner cross-section of the lamp cover 30 is arranged in a semi-circular shape, and the inner part of the lamp cover 30 is provided with a three-dimensional arc chamfer at the four corners. The inner part of the lamp cover 30 provides a 3D stereoscopic reflection for the LED light 20, so that the light emitted by the LED light 20 into the lamp cover 30 is reflected by the arc-shaped inner wall to the opening 31 and then emitted. The three-dimensional arc chamfer at the four corners of the inner part of the lamp cover 30 can improve the brightness of the LED light 20, enhance the reflection intensity, and make the light emitted by the LED light 20 brighter and more concentrated.

[0029] Further, referring to Figure 2 , the light-emitting angle of the LED lamp 20 is within the light-emitting area 40, and the light-emitting angle of the LED lamp 20 is concentrated within the range of the lamp cover 30. The light emitted by the LED lamp 20 enters the lamp cover 30 and is concentrated, and is emitted through the upper opening 31 of the lamp cover 30.

[0030] Further, referring to Figure 2 , the size of the lamp cover 30 is adapted to the size of the light-emitting area 40. Each lamp cover 30 corresponds to a light-emitting area 40, and the adjacent sides of the two adjacent lamp covers 30 in contact with each other. The plurality of lamp covers 30 separate the plurality of LED lamps 20 into independent light-emitting areas 40, so that the light emission of the LED lamp 20 does not affect the adjacent LED lamps 20.

[0031] Further, referring to Figure 3 , a reflective layer 50 for enhancing light reflection is provided on the inner wall of the lamp cover 30. The reflective layer 50 can improve the light reflectivity of the light emitted by the LED lamp 20 into the lamp cover 30, thereby increasing the utilization rate of light.

[0032] Further, referring to Figure 3 , the reflective layer 50 is a reflective film with a reflectivity greater than 90%, and the reflective film is attached to the inner wall of the lamp cover 30.

[0033] The backlight reflection structure is provided with a lamp cover 30 on each LED lamp 20. The lamp cover 30 serves to separate adjacent light-emitting areas 40. The light emitted by the LED lamp 20 enters the lamp cover 30 through the through hole 32, and is reflected by the inner wall of the lamp cover 30 to the upper opening 31 of the lamp cover 30 and emitted. The lamp cover 30 concentrates the light-emitting angle of the LED lamp 20 within the light-emitting area 40, so that the light emission of the LED lamp 20 does not affect the adjacent LED lamps 20.

[0034] The above embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A reflective structure for area dimming backlight, characterized in that, Comprising: A circuit board (10) and a plurality of LED lights (20) disposed on the circuit board (10), each LED light (20) being covered with a lamp shade (30), and the lamp shade (30) being used to separate two adjacent LED lights (20).

2. The reflective structure for area dimming backlight according to claim 1, characterized in that, The plurality of LED lights (20) are distributed in a rectangular array on the circuit board (10).

3. The reflective structure for area dimming backlight according to claim 2, wherein Each LED light (20) forms a light-emitting area (40), and each light-emitting area (40) is independent of each other.

4. The reflective structure for area dimming backlight according to claim 3, wherein, The lamp shade (30) is rectangularly arranged, the lamp shade (30) is hollow and has an opening (31) at one end, the opening (31) end of the lamp shade (30) is upwardly covered outside the LED light (20), a through hole (32) is opened at the bottom end of the lamp shade (30), the through hole (32) is opened at a position relative to the LED light (20), and the LED light (20) is accommodated in the lamp shade (30) through the through hole (32).

5. The reflective structure for area dimming backlight according to claim 4, characterized in that, The size of the through hole (32) is larger than the size of the LED light (20), and the light emitted by the LED light (20) enters the lamp shade (30) through the through hole (32) and is emitted through the opening (31) of the lamp shade (30).

6. The reflective structure for area dimming backlight according to claim 5, characterized in that, The inner cross-section of the lamp shade (30) is semicircularly arranged, and the inner part of the lamp shade (30) near the four corners is provided with a three-dimensional arc chamfer.

7. The reflective structure for area dimming backlight according to claim 6, wherein, The light-emitting angle of the lamp shade (30) is within the light-emitting area (40), and the light-emitting angle of the LED light (20) is concentrated within the range of the lamp shade (30).

8. A reflective structure for area dimming backlight according to claim 7, characterized in that, The size of the lamp shade (30) is adapted to the size of the light-emitting area (40), and the mutually facing sides between two adjacent lamp shades (30) are in contact.

9. A reflective structure for area dimming backlight according to claim 8, wherein, A reflective layer (50) for enhancing light reflection is provided on the inner wall of the lamp shade (30).

10. The reflective structure for area dimming backlight according to claim 9, wherein, The reflective layer (50) is a reflective film with a reflectivity greater than 90%, and the reflective film is attached to the inner wall of the lamp shade (30).

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