CN211475836U

CN211475836U - Direct type backlight module and light source device

Info

Publication number: CN211475836U
Application number: CN202020017127.5U
Authority: CN
Inventors: 熊远江; 潘伟锋
Original assignee: Shenzhen Techaser Technologies Co Ltd
Current assignee: Shenzhen Techaser Technologies Co Ltd
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2020-09-11
Anticipated expiration: 2030-01-06

Abstract

The utility model discloses a direct type backlight module and a light source device, wherein the direct type backlight module comprises an outer frame, a PCB (printed Circuit Board), an LED (light emitting diode) lamp, a light diffusion plate and a diffusion plate, the outer frame is provided with a concave cavity, and the PCB is connected to the outer frame and positioned in the concave cavity; the LED lamps are distributed on the PCB in multiple rows and multiple columns; the light-diffusing plate is covered above the plurality of LED lamps, one side of the light-diffusing plate facing the plurality of LED lamps is provided with a plurality of arc-shaped grooves which are arranged in parallel, and the plurality of arc-shaped grooves are covered with the plurality of LED lamps; and the diffusion plate is covered above the outer frame, and the PCB, the LED lamp and the light diffusion plate are limited in the concave cavity. The direct type backlight module can reduce the number of the LED lamps by half compared with the number of the LED lamps in the prior art on the premise of uniform brightness and good visual effect, thereby reducing the manufacturing cost; or the utility model discloses a backlight unit thickness compares the purpose of the backlight unit thickness attenuation half of prior art.

Description

Direct type backlight module and light source device

Technical Field

The utility model relates to a light source technical field especially relates to a straight following formula backlight unit and light source device.

Background

The direct type backlight module comprises important components such as a light-diffusing plate, an LED (light emitting Diode) and a PCB (Printed Circuit Board), wherein on the premise of ensuring good optical effect, the light-diffusing plate in the prior art is generally of a flat plate structure, and the optimal mode is achieved in that the distance a ' between the LED lamp and the diffusion plate is equal to the distance B ' between two adjacent rows of LED lamps and the LED lamp, and meanwhile, the distance between the LED lamp and the diffusion plate is equal to the distance C ' between two adjacent rows of LED lamps and the LED lamp, that is, a ' ═ B ' ═ C ', wherein the number of the LED lamps is N '. However, this can not satisfy the market far away and to the backlight unit thickness thin and producer to the LED lamp quantity few and realize with low costs demand, if accomplish to be equal to the LED lamp with the distance of LED lamp to the diffusion sheet about equal to the LED lamp of the half of the linear distance between LED lamp and the LED lamp or reduce and be equal to half quantity when the LED lamp, all can lead to bright dark inequality, influence optical effect. Therefore, a direct type backlight module that solves the problems of large number of LEDs and/or thick thickness of the backlight module is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a direct type backlight module which can reduce the number of LED lamps by half compared with the number of the LED lamps in the prior art under the premise of uniform brightness and good visual effect, thereby reducing the manufacturing cost; or the utility model discloses a backlight unit compares the purpose of the backlight unit thickness attenuation half of prior art.

Another object of the present invention is to provide a direct-type light source device, which can reduce the number of LED lamps by half compared with the number of LED lamps in the prior art, thereby reducing the manufacturing cost; or the utility model discloses a backlight unit compares the purpose of the backlight unit thickness attenuation half of prior art.

To achieve the purpose, the utility model adopts the following technical proposal:

a direct type backlight module comprises an outer frame, a PCB (printed circuit board), an LED (light-emitting diode) lamp, a light-diffusing plate and a diffusion plate, wherein the outer frame is provided with a concave cavity, and the PCB is connected to the outer frame and positioned in the concave cavity; the LED lamps are distributed on the PCB in multiple rows and multiple columns; the light-diffusing plate is covered above the plurality of LED lamps, a plurality of arc-shaped grooves which are arranged in parallel are arranged on one side of the light-diffusing plate facing the plurality of LED lamps, and the plurality of LED lamps are covered by the plurality of arc-shaped grooves; and the diffusion plate is covered above the outer frame, and the PCB, the LED lamp and the light diffusion plate are limited in the concave cavity. The distance between the LED lamps and the diffusion plate is A1, the distance between two adjacent rows of the LED lamps is B1, and the distance between two adjacent rows of the LED lamps is C1, wherein A1 is B1 which is 0.5 multiplied by C1; or the distance between the LED lamps and the diffusion plate is A2, the distance between two adjacent rows of the LED lamps is B2, and the distance between two adjacent rows of the LED lamps is C2, wherein A2 is 0.5 multiplied by B2 which is C2; or the number of the LED lamps is N, wherein N is an integer and is not less than 2, the distance between the LED lamps and the diffusion plate is A3, the distance between two adjacent rows of the LED lamps is B3, and the distance between two adjacent rows of the LED lamps is C3, wherein A3-B3-0.5 × C3.

Optionally, each column of the LED lamps or each row of the LED lamps is covered by each arc-shaped groove.

Optionally, steps are disposed on two opposite side walls of the outer frame, and two ends of the diffuser plate are respectively overlapped on the step surfaces of the two steps.

Optionally, the light diffusion sheet is a polycarbonate sheet or a polymethylmethacrylate sheet.

Optionally, the number of the arc-shaped slots is equal to the number of columns or rows of the LED lamps.

A direct type light source device comprises the direct type backlight module.

The utility model discloses a straight following formula backlight unit is for prior art's beneficial effect: the top cover at the LED lamp is equipped with the diffusion sheet, and the diffusion sheet is equipped with a plurality of parallel arrangement's arc wall towards one side of LED lamp, and every row of LED lamp is established to every arc wall cover, because the surface that is equipped with the arc wall is the curved surface, and luminous angle can increase, and the light on diffuser plate surface is the mixed light that all directions LED lamp assembled each other, and is bright dark even, and visual effect is good. Meanwhile, the direct type backlight module of the utility model can reduce the number of the LED lamps by half compared with the number of the LED lamps in the prior art, thereby reducing the manufacturing cost; or the utility model discloses a backlight unit thickness is half the purpose of the relative backlight unit thickness attenuation of prior art.

The utility model discloses a straight following formula light source device is for prior art's beneficial effect: the direct type light source device can reduce the number of the LED lamps by half compared with the number of the LED lamps in the prior art on the premise of uniform brightness and good visual effect, thereby reducing the manufacturing cost; or the utility model discloses a backlight unit thickness is half the purpose of the relative backlight unit thickness attenuation of prior art.

Drawings

Fig. 1 is a schematic structural view of a direct type backlight module according to an embodiment of the present invention;

fig. 2 is a front view of a light diffusion plate according to an embodiment of the present invention;

fig. 3 is a bottom view of a light diffusion plate according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an LED lamp distribution according to an embodiment of the present invention, wherein a1 is B1 is 0.5 × C1;

fig. 5 is a schematic diagram of an LED lamp distribution according to an embodiment of the present invention, where a2 is 0.5 × B2 is C2;

fig. 6 is a schematic diagram of a distribution of LED lamps satisfying a3 ═ B3 ═ 0.5 × C3 in a trial mode according to the present invention.

Reference numerals:

the LED lamp comprises an outer frame-1, a PCB (printed Circuit Board) -2, an LED lamp-3, a light-diffusing plate-4, an arc-shaped groove-41 and a diffusion plate-5.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

The following describes a direct type backlight module according to an embodiment of the present invention with reference to fig. 1 to 6.

The direct type backlight module shown in fig. 1 to 3 comprises an outer frame 1, a PCB 2, an LED lamp 3, a light diffusion plate 4 and a diffusion plate 5, wherein the outer frame has a concave cavity, and the PCB 2 is connected to the outer frame 1 and located in the concave cavity; the LED lamps 3 are multiple, and the LED lamps 3 are distributed on the PCB 2 in multiple rows and multiple columns; the light-diffusing plate 4 is covered above the plurality of LED lamps 3, one side of the light-diffusing plate 4 facing the plurality of LED lamps 3 is provided with a plurality of arc-shaped grooves 41 arranged in parallel, and the plurality of arc-shaped grooves 41 are covered with the plurality of LED lamps 3; and the diffusion plate 5 is covered above the outer frame 1, and limits the PCB 2, the LED lamp 3 and the light diffusion plate 4 in the concave cavity.

It can be understood that, be equipped with the diffusion sheet 4 at the top cover of LED lamp 3, the diffusion sheet 4 is equipped with a plurality of parallel arrangement's arc 41 towards one side of LED lamp 3, and every row of LED lamp 3 is established to every arc 41 cover, because the surface that is equipped with arc 41 is the curved surface, and luminous angle can increase, and the light on diffusion plate 5 surface is the mixed light that all directions LED lamp 3 gathered each other, and is bright dark even, and visual effect is good. Meanwhile, the direct type backlight module of the utility model can achieve the purpose of small quantity of LED lamps 3 under the premise of uniform brightness and good visual effect, thereby reducing the manufacturing cost; or/and the thickness of the backlight module is reduced.

Advantageously, the plurality of LED lamps 3 is distributed in a rectangular arrangement.

Alternatively, as shown in fig. 1 and 4, the distance between the LED lamps 3 and the diffusion plate 5 is a1, the distance between two adjacent rows of LED lamps 3 is B1, and the distance between two adjacent rows of LED lamps 3 is C1, where a 1-B1-0.5 × C1.

It should be explained that, on the premise that the direct type backlight module satisfies the uniformity of light brightness, the distance between the LED lamp 3 and the diffusion plate 5 is half of the distance between two adjacent rows of LED lamps 3, which is thinner than the distance between the LED lamp 3 and the diffusion plate 5 in the prior art, which means that the thickness of the backlight module is thinner and is half thinner, that is, a1 is 0.5 × a', which meets the market demand. Of course, in some embodiments of the present invention, a1 ═ B1 ═ 0.5 × m × C1, and m is a coefficient, where m is 1, and m may float up and down at the optimal value.

Alternatively, as shown in fig. 1 and 5, the distance between the LED lamps 3 and the diffusion plate 5 is a2, the distance between two adjacent rows of LED lamps 3 is B2, and the distance between two adjacent rows of LED lamps 3 is C2, where a2 is 0.5 × B2 is C2.

It should be explained that, on the premise that the direct type backlight module satisfies the uniformity of light brightness, the distance between the LED lamps 3 and the diffusion plate 5 is half of the distance between two adjacent rows of LED lamps 3, which is thinner than the distance between the LED lamps 3 and the diffusion plate 5 in the prior art, which means that the thickness of the backlight module is thinner and is half thinner, that is, a2 is 0.5 × a', which meets the market demand. Of course, in other embodiments of the present invention, a2 is 0.5 × m × B2 is C2, m is a coefficient, where m is 1, and m may float up and down at the optimal value.

Optionally, as shown in FIG. 1 and FIG. 6, the number of the LED lamps is N, wherein N is an integer and N ≧ 2. The distance between the LED lamps 3 and the diffusion plate 5 is a3, the distance between two adjacent rows of LED lamps 3 is B3, and the distance between two adjacent rows of LED lamps 3 is C3, where a3 is B3 is 0.5 × C3.

It should be explained that, on the premise that the direct type backlight module satisfies the uniformity of light brightness, the distance between the LED lamps 3 and the diffusion plate 5 is equal to the distance between two adjacent rows of LED lamps 3, and meanwhile, the distance between the LED lamps 3 and the diffusion plate 5 is equal to half of the distance between two adjacent rows of LED lamps 3, but the number of the LED lamps 3 in the present embodiment is reduced by half compared with the number of the LED lamps 3 in the prior art, that is, N is 0.5 × N', which further reduces the manufacturing cost. Of course, in other embodiments of the present invention, the number of LED lamps 3 may be reduced by half.

Optionally, each arc-shaped slot 41 covers each column of LED lamps 3 or each row of LED lamps 3. When each arc-shaped groove 41 covers each row of LED lamps 3, a 1-B1-0.5 × C1 or A3-B3-0.5 × C3 is satisfied; when each arc-shaped groove 41 covers each row of the LED lamps 3, a2 ═ 0.5 × B2 ═ C2 or A3 ═ B3 ═ 0.5 × C3 is satisfied.

Optionally, steps are disposed on two opposite side walls of the outer frame 1, and two ends of the diffuser plate 5 are respectively overlapped on the step surfaces of the two steps.

Alternatively, the light diffusion sheet 4 is a polycarbonate sheet or a polymethyl methacrylate sheet. In other embodiments of the present invention, the material of the light diffusion plate 4 may be selected according to specific requirements.

Optionally, the number of the arc-shaped grooves 41 is equal to the number of columns or rows of the LED lamps 3, and it is ensured that each column or each row is covered by the arc-shaped grooves 41, so as to further ensure uniform brightness of light.

A direct type light source device comprises a direct type backlight module. The direct type backlight template can reduce the number of the LED lamps 3, thereby reducing the manufacturing cost; or/and the thickness of the backlight module is reduced.

The first embodiment is as follows:

as shown in fig. 1 to 4 straight following formula backlight unit includes frame 1, PCB board 2, a plurality of LED lamp 3, diffusion sheet 4 and diffuser plate 5, frame 1 has the cavity, PCB board 2 is connected on frame 1 and is located the top of cavity, a plurality of LED lamp 3 are multirow multiseriate and distribute on PCB board 2, diffusion sheet 4 covers the top of establishing at a plurality of LED lamp 3, diffusion sheet 4 is equipped with a plurality of parallel arrangement's arc 41 towards one side of a plurality of LED lamp 3, a plurality of LED lamp 3 are established to a plurality of arc 41 covers, and diffuser plate 5 covers the top of establishing at frame 1, with PCB board 2, LED lamp 3 and diffusion sheet 4 are injectd in the cavity. The distance between the LED lamps 3 and the diffusion plate 5 is a1, the distance between two adjacent rows of LED lamps 3 is B1, and the distance between two adjacent rows of LED lamps 3 is C1, where a1 is B1 is 0.5 × C1. Each arc-shaped groove 41 covers each column of LED lamps 3. The two opposite side walls of the outer frame 1 are provided with steps, two ends of the diffusion plate 5 are respectively lapped on the step surfaces of the two steps, the light diffusion plate 4 is a polycarbonate plate or a polymethyl methacrylate plate, and the number of the arc-shaped grooves 41 is equal to the number of the rows of the LED lamps 3.

Example two:

as shown in fig. 1, fig. 2, the straight following formula backlight unit that fig. 3 and 5 show includes frame 1, PCB board 2, a plurality of LED lamp 3, diffusion sheet 4 and diffuser plate 5, frame 1 has the cavity, PCB board 2 is connected on frame 1 and is located the top of cavity, a plurality of LED lamp 3 are multirow multiseriate and distribute on PCB board 2, diffusion sheet 4 covers the top of establishing at a plurality of LED lamp 3, diffusion sheet 4 is equipped with a plurality of parallel arrangement's arc 41 towards one side of a plurality of LED lamp 3, a plurality of LED lamp 3 are established to a plurality of arc 41 covers, and 5 lid establish the top diffuser plate at frame 1, with PCB board 2, the LED lamp 3 is injectd in the cavity with diffusion sheet 4. The distance between the LED lamps 3 and the diffusion plate 5 is a2, the distance between two adjacent rows of LED lamps 3 is B2, and the distance between two adjacent rows of LED lamps 3 is C2, wherein a2 is 0.5 × B2 is C2, and each row of LED lamps 3 is covered by each arc-shaped groove 41. The two opposite side walls of the outer frame 1 are provided with steps, two ends of the diffusion plate 5 are respectively lapped on the step surfaces of the two steps, the light diffusion plate 4 is a polycarbonate plate or a polymethyl methacrylate plate, and the number of the arc-shaped grooves 41 is equal to the number of the rows of the LED lamps 3.

Example three:

as shown in fig. 1, fig. 2, the straight following formula backlight unit that fig. 3 and fig. 6 show includes frame 1, PCB board 2, a plurality of LED lamps 3, diffusion sheet 4 and diffuser plate 5, frame 1 has the cavity, PCB board 2 is connected on frame 1 and is located the top of cavity, a plurality of LED lamps 3 are multirow multiseriate and distribute on PCB board 2, diffusion sheet 4 covers the top of establishing at a plurality of LED lamps 3, diffusion sheet 4 is equipped with a plurality of parallel arrangement's arc 41 towards one side of a plurality of LED lamps 3, a plurality of LED lamps 3 are established to a plurality of arc 41 covers, and diffuser plate 5 covers the both sides of establishing frame 1, with PCB board 2, LED lamps 3 and diffusion sheet 4 are injectd in the cavity. The distance between the LED lamps 3 and the diffusion plate 5 is A3, the distance between two adjacent rows of LED lamps 3 is B3, and the distance between two adjacent rows of LED lamps 3 is C3, where A3 is B3 which is 0.5 × C3, and each arc-shaped groove 41 covers each row of LED lamps 3 or each row of LED lamps 3. The two opposite side walls of the outer frame 1 are provided with steps, two ends of the diffusion plate 5 are respectively lapped on the step surfaces of the two steps, the light diffusion plate 4 is a polycarbonate plate or a polymethyl methacrylate plate, and the number of the arc-shaped grooves 41 is equal to the number of rows or the number of rows of the LED lamps 3.

In the description herein, references to the description of "some embodiments," "other embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Further, it is to be understood that the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "connected," "mounted," "secured," and the like are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The above-mentioned meaning belonging to the present invention can be understood by those skilled in the art according to the specific situation.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A direct type backlight module is characterized by comprising:

an outer frame (1) having a cavity;

the PCB (2) is connected to the outer frame (1) and is positioned in the concave cavity;

the LED lamps (3) are multiple, and the LED lamps (3) are distributed on the PCB (2) in multiple rows and multiple columns;

the LED lamp comprises a light-diffusing plate (4), wherein the light-diffusing plate (4) is covered above the LED lamps (3), one side of the light-diffusing plate (4) facing the LED lamps (3) is provided with a plurality of arc-shaped grooves (41) which are arranged in parallel, and the plurality of arc-shaped grooves (41) are covered with the LED lamps (3); and

the diffusion plate (5) is covered above the outer frame (1), and the PCB (2), the LED lamp (3) and the light diffusion plate (4) are limited in the concave cavity;

the distance between the LED lamps (3) and the diffusion plate (5) is A1, the distance between two adjacent rows of the LED lamps (3) is B1, and the distance between two adjacent rows of the LED lamps (3) is C1, wherein A1 is B1 which is 0.5 × C1; or the distance between the LED lamps (3) and the diffusion plate (5) is A2, the distance between two adjacent rows of the LED lamps (3) is B2, and the distance between two adjacent rows of the LED lamps (3) is C2, wherein A2 is 0.5 multiplied by B2 which is C2; or the number of the LED lamps is N, wherein N is an integer and is not less than 2, the distance between the LED lamps (3) and the diffusion plate (5) is A3, the distance between two adjacent rows of the LED lamps (3) is B3, and the distance between two adjacent rows of the LED lamps (3) is C3, wherein A3 is B3 which is 0.5 × C3.

2. The direct type backlight module according to claim 1, wherein each of the arc-shaped grooves (41) covers each row of the LED lamps (3) or each row of the LED lamps (3).

3. The direct type backlight module according to claim 1, wherein the outer frame (1) has steps on two opposite sidewalls, and the diffuser plate (5) has two ends respectively overlapping the step surfaces of the two steps.

4. The direct type backlight module according to claim 1, wherein the light diffusion plate (4) is a polycarbonate plate or a polymethyl methacrylate plate.

5. The direct type backlight module according to claim 2, wherein the number of the arc-shaped grooves (41) is equal to the number of columns or rows of the LED lamps (3).

6. A direct type light source device, comprising the direct type backlight module according to any one of claims 1 to 5.