CN211475837U - Direct type backlight module and light source device - Google Patents

Abstract

The utility model discloses a direct type backlight module and a light source device. The direct type backlight module comprises an outer frame, a PCB board, an LED lamp, a diffuser plate and a diffuser plate, the outer frame is provided with a concave cavity, and the PCB board is connected to the outer frame and connected to the outer frame. It is located in the cavity; there are multiple LED lights, and the multiple LED lights are distributed on the PCB board in multiple rows and columns; the diffuser plate cover is arranged above the multiple LED lights, and the side of the diffuser plate facing the multiple LED lights is provided with The semicircular grooves are distributed in multiple rows and columns, and each semicircular groove is covered with an LED lamp; and the diffuser plate cover is arranged above the outer frame, and the PCB board, the LED lamp and the diffuser plate are limited in the cavity. The direct-lit backlight module can reduce the number of LED lights by three-quarters compared with the number of LED lights in the prior art under the premise of uniform brightness and darkness and good visual effect, thereby reducing the manufacturing cost; or a utility model backlight The purpose of reducing the thickness of the module by half compared to the thickness of the backlight module in the prior art.

Description

A direct type backlight module and light source device

technical field

The utility model relates to the technical field of light sources, in particular to a direct type backlight module and a light source device.

Background technique

The direct type backlight module includes important components such as astigmatism plate, LED lamp (LightEmitting Diode, light-emitting diode), and PCB board (Printed Circuit Board, printed circuit board). The board is generally a flat plate structure. The best way to achieve this is that the distance A' between the LED lights and the diffuser plate is equal to the distance B' between the two adjacent rows of LED lights and the LED lights. At the same time, the distance between the LED lights and the diffuser board is The spacing is equal to the spacing C' between the LED lamps in two adjacent columns, that is, A'=B'=C', wherein the number of LED lamps is N'. However, this is far from meeting the market's demand for a thin light guide plate and a small number of LED lights to achieve low cost. If the distance from the LED light to the diffuser plate is equal to the straight-line distance between the LED light and the LED light When the number of LED lights is reduced by one-half or three-quarters, it will cause uneven brightness and affect the optical effect. Therefore, there is an urgent need for a direct-lit backlight module with a large number of LEDs or/and a thick light guide plate.

Utility model content

The purpose of the present utility model is to provide a direct type backlight module, which can reduce the number of LED lamps by four compared with the number of LED lamps in the prior art under the premise of uniform brightness and darkness and good visual effect. three-thirds, thereby reducing the manufacturing cost; or the purpose of reducing the thickness of the backlight module of the present invention by half compared with the backlight module of the prior art.

Another object of the present invention is to provide a direct-type light source device, which can reduce the number of LED lights by four compared with the number of LED lights in the prior art under the premise of uniform brightness and darkness and good visual effect. three-thirds, thereby reducing the manufacturing cost; or the purpose of reducing the thickness of the backlight module of the present invention by half compared with the backlight module of the prior art.

For this purpose, the utility model adopts the following technical solutions:

A direct type backlight module includes an outer frame, a PCB board, an LED lamp, a diffuser plate and a diffusion plate, the outer frame has a cavity, and the PCB board is connected to the outer frame and located in the cavity; the There are a plurality of the LED lights, and the plurality of the LED lights are distributed on the PCB board in multiple rows and columns; the diffuser plate cover is arranged above the plurality of the LED lights, and the diffuser plate faces the plurality of all the LED lights. One side of the LED lamp is provided with semicircular grooves distributed in multiple rows and columns, each of the semicircular grooves is covered with one of the LED lamps; The board, the LED lights and the diffusing board are defined in the cavity; the spacing between the LED lights and the diffusing board is A1, and the spacing between the two adjacent rows of the LED lights is B1 , the spacing between the LED lights in two adjacent columns is C1, where A1=0.5×B1=0.5×C1; or the number of LED lights is N, where N is an integer and N≥2, the LEDs The distance between the lamp and the diffuser plate is A2, the distance between the two adjacent rows of the LED lamps is B2, and the distance between the two adjacent rows of the LED lamps is C2, where A2=2×B2 =2×C2.

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

Optionally, the light diffusing plate is a polycarbonate plate or a polymethyl methacrylate plate.

Optionally, the number of the semicircular grooves is equal to the number of the LED lights.

The direct type backlight module of the present invention has the beneficial effects relative to the prior art: a diffuser plate is provided above the LED lamp, and the side of the diffuser plate facing the LED lamp is provided with multiple rows of distributed semicircular grooves. The groove cover is provided with an LED light. The surface of the semi-circular groove is a curved surface, and the light-emitting angle will increase. The light on the surface of the diffuser plate is the mixed light of the LED lights in all directions, which is uniform in brightness and darkness, and has a good visual effect. At the same time, the direct-lit backlight module of the present invention can reduce the number of LED lamps by three-quarters compared with the number of LED lamps in the prior art, thereby reducing the manufacturing cost; or the thickness of the backlight module of the present invention is less than that of the prior art The purpose of reducing the thickness of the backlight module by half.

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

The beneficial effects of the direct-type light source device of the present invention relative to the prior art: the direct-type light source device can reduce the number of LED lights compared to the number of LED lights in the prior art under the premise of uniform brightness and darkness and good visual effect. Three quarters, thereby reducing the manufacturing cost; or the purpose of reducing the thickness of the backlight module of the present invention by half compared to the thickness of the backlight module of the prior art.

Description of drawings

1 is a schematic structural diagram of a direct-type backlight module provided by a specific embodiment of the present invention;

2 is a front view of a diffuser plate provided by a specific embodiment of the present invention;

3 is a bottom view of a diffuser plate provided by a specific embodiment of the present invention;

FIG. 4 is a schematic diagram of the distribution of LED lamps that satisfies A1=0.5×B1=0.5×C1 provided by a specific embodiment of the present invention;

FIG. 5 is a schematic diagram of the distribution of LED lamps that satisfies A2=2×B2=2×C2 provided by a specific embodiment of the present invention.

Reference number:

Outer frame-1, PCB board-2, LED light-3, diffuser plate-4, semicircular groove-41, diffuser plate-5.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

The direct type backlight module according to the embodiment of the present invention will be described below with reference to FIGS. 1 to 5 .

The direct type backlight module shown in FIG. 1 to FIG. 3 includes an outer frame 1 , a PCB board 2 , an LED lamp 3 , a diffuser plate 4 and a diffusion plate 5 . The outer frame 1 has a cavity, and the PCB board 2 is connected to the outer frame 1 . and located in the cavity; there are a plurality of LED lamps 3, and the plurality of LED lamps 3 are distributed on the PCB board 2 in multiple rows and columns; the diffuser plate 4 is covered and arranged above the plurality of LED lamps 3, and the diffuser plate 4 faces the plurality of LED lamps 3. One side of the LED lamp 3 is provided with a plurality of rows and columns of semicircular grooves 41, and each semicircular groove 41 is covered with an LED lamp 3; And the diffusing plate 4 is defined in the cavity.

It can be understood that a diffuser plate 4 is provided above the LED lamp 3 , and the side of the diffuser plate 4 facing the LED lamp 3 is provided with multiple rows of semicircular grooves 41 , since each semicircular groove 41 is covered with an LED lamp 3 . , Since the surface of the semicircular groove 41 is a curved surface, the light emitting angle will increase, and the light on the surface of the diffuser plate 5 is the mixed light of the LED lamps 3 in all directions, which is uniform in brightness and darkness, and has a good visual effect. At the same time, the direct type backlight module of the present invention can achieve the purpose of reducing the number of LED lamps 3 , thereby reducing the manufacturing cost; or reducing the thickness of the light guide plate.

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

Optionally, the distance between the LED lamps 3 and the diffuser 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= 0.5×B1=0.5×C1.

It should be explained that, under the premise that the direct type backlight module satisfies the uniformity of light and darkness, the distance between the LED lamps 3 and the diffuser plate 5 is half of the distance between the adjacent two rows of LED lamps 3. At the same time, the LED lamps 3 The distance between the lamp 3 and the diffuser plate 5 is also half of the distance between the adjacent two rows of LED lamps 3, which is thinner compared to the distance between the LED lamp 3 and the diffuser plate 5 in the prior art, which means The thickness of the light guide plate is reduced by half, that is, A1=0.5×A', which meets the needs of the market. Of course, in some embodiments of the present invention, A1=0.5×m1×B1=0.5×m2×C1, m1 and m2 are both coefficients, wherein, the optimal value of m1 is 1, and the optimal value of m2 is 1, m1 and m2 can float up and down the optimal value.

Optionally, the number of LED lamps is N, where N is an integer and N≥2, the distance between the LED lamps 3 and the diffuser plate 5 is A2, and the distance between two adjacent rows of LED lamps 3 is B2, The distance between two adjacent rows of LED lamps 3 is C2, wherein A2=2×B2=2×C2.

It should be explained that under the premise that the direct-lit backlight module satisfies the uniform brightness and darkness, the distance between the LED lamps 3 and the diffuser plate 5 is equal to twice the distance between the adjacent two rows of LED lamps 3. At the same time, The distance between the LED lamps 3 and the diffuser plate 5 is equal to twice the distance between the LED lamps 3 in two adjacent columns, but the number of the LED lamps 3 in the present invention is relative to the number of the LED lamps 3 in the prior art It is reduced by three quarters, that is, N=1/4×N′, which further reduces the manufacturing cost. Of course, in other embodiments of the present invention, the number of LED lamps 3 can be reduced by three-quarters.

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

Optionally, the diffuser plate 4 is a polycarbonate plate or a polymethyl methacrylate plate. It should be noted that, in other embodiments of the present invention, the material of the diffusing plate 4 can be selected according to specific needs.

Optionally, the number of the semicircular grooves 41 is equal to the number of the LED lamps 3 , to ensure that each LED lamp 3 can be covered by the semicircular grooves 41 , further ensuring that the light is bright and dark evenly.

A direct type light source device includes a direct type backlight module. The direct type light source device can achieve the purpose of reducing the number of LED lamps 3, thereby reducing the manufacturing cost; or/and reducing the thickness of the light guide plate.

Example 1:

The direct type backlight module shown in FIG. 1 to FIG. 4 includes an outer frame 1, a PCB board 2, a plurality of LED lamps 3, a diffuser plate 4 and a diffusion plate 5. The outer frame 1 has a cavity, and the PCB board 2 is connected to the outer frame. 1 and above the cavity; a plurality of LED lamps 3 are distributed on the PCB board 2 in multiple rows and columns; a diffuser plate 4 is covered above the plurality of LED lamps 3 , and the diffuser plate 4 faces the sides of the plurality of LED lamps 3 . One side is provided with multiple rows and columns of semicircular grooves 41, each semicircular groove 41 is covered with an LED lamp 3, and the diffuser plate 5 is covered above the outer frame 1, and the PCB board 2, the LED lamp 3 and the diffuser plate 4 are covered. confined within the lumen. The distance between the LED lamps 3 and the diffuser 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=0.5×B1= 0.5×C1. The two opposite side walls of the outer frame 1 are provided with steps, the two ends of the diffuser plate 5 are respectively overlapped on the stepped surfaces of the two steps, and the diffuser plate 4 is a polycarbonate plate or a polymethyl methacrylate plate. , the number of semicircular grooves 41 is equal to the number of LED lamps 3 .

Embodiment 2:

The direct type backlight module shown in Figures 1 to 3 and Figure 5 includes an outer frame 1, a PCB board 2, a plurality of LED lamps 3, a diffuser plate 4 and a diffusion plate 5. The outer frame 1 has a cavity, and the PCB board 2 Connected to the outer frame 1 and located above the cavity, the plurality of LED lamps 3 are distributed on the PCB board 2 in multiple rows; the diffuser plate 4 is covered above the plurality of LED lamps 3, and the diffuser plate 4 faces the plurality of LED lamps 3. One side is provided with multi-row and multi-column semicircular grooves 41, each semicircular groove 41 is covered with an LED lamp 3; 4 is confined within the lumen. The distance between the LED lamps 3 and the diffuser 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=2×B2= 2 x C2. The two opposite side walls of the outer frame 1 are provided with steps, the two ends of the diffuser plate 5 are respectively overlapped on the stepped surfaces of the two steps, and the diffuser plate 4 is a polycarbonate plate or a polymethyl methacrylate plate. , the number of semicircular grooves 41 is equal to the number of LED lamps 3 .

In the description of this specification, description with reference to the terms "some embodiments", "other embodiments", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one implementation of the present invention example or example. In this specification, schematic representations of the above terms 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.

In addition, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. are based on the orientation or positional relationship shown in the accompanying drawings , is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the present utility model, unless otherwise expressly specified and limited, terms such as "connected", "connected", "installed", "fixed" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the above-mentioned specific meanings in the present invention can be understood according to specific situations.

In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of the features, which are used to distinguish and describe the features, regardless of order or importance. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope, and the content of this description should not be construed as Limitations of the present invention.

Claims (5)

1. a direct type backlight module, is characterized in that, comprises: an outer frame (1) with a cavity; PCB board (2), the PCB board (2) is connected to the outer frame (1) and located in the cavity; LED lights (3), the LED lights (3) are multiple, and the multiple LED lights (3) are distributed on the PCB board (2) in multiple rows and multiple columns; A diffuser plate (4), the diffuser plate (4) is covered and arranged above the plurality of the LED lamps (3), and the side of the diffuser plate (4) facing the plurality of the LED lamps (3) is provided with A plurality of rows and columns of semicircular grooves (41) are distributed, and each of the semicircular grooves (41) is covered with one of the LED lights (3); and A diffuser plate (5), the diffuser plate (5) is covered above the outer frame (1), and the PCB board (2), the LED lamp (3) and the diffuser plate (4) confined within the cavity; Wherein, the distance between the LED lamps (3) and the diffuser plate (5) is A1, the distance between the two adjacent rows of the LED lamps (3) is B1, and the two adjacent rows of the LED lamps The distance between (3) is C1, wherein, A1=0.5×B1=0.5×C1; or the number of LED lamps is N, where N is an integer and N≥2, the LED lamps (3) and all The distance between the diffuser plates (5) is A2, the distance between the two adjacent rows of the LED lamps (3) is B2, and the distance between the two adjacent rows of the LED lamps (3) is C2, wherein , A2=2×B2=2×C2. 2 . The direct type backlight module according to claim 1 , wherein the two opposite side walls of the outer frame ( 1 ) are provided with steps, and the two ends of the diffuser plate ( 5 ) are respectively It is overlapped on the step surfaces of the two steps. 3 . The direct type backlight module according to claim 1 , wherein the diffusing plate ( 4 ) is a polycarbonate plate or a polymethyl methacrylate plate. 4 . 4. The direct type backlight module according to claim 1, wherein the number of the semicircular grooves (41) is equal to the number of the LED lamps (3). 5. A direct type light source device, characterized in that it comprises the direct type backlight module according to any one of claims 1-4.

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