CN211475837U - Direct type backlight module and light source device - Google Patents
Direct type backlight module and light source device Download PDFInfo
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- CN211475837U CN211475837U CN202020021598.3U CN202020021598U CN211475837U CN 211475837 U CN211475837 U CN 211475837U CN 202020021598 U CN202020021598 U CN 202020021598U CN 211475837 U CN211475837 U CN 211475837U
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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 rows and a plurality of columns of distributed semicircular grooves, and each semicircular groove is covered with one LED lamp; 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 three quarters 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
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 on the market is generally of a flat plate structure at present, and the optimal mode is achieved in such a way 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, namely, a ' ═ B ' ═ C ', wherein the number of the LED lamps is N '. However, this is far from meeting the market demand for the light guide plate to be thin and the producer to the LED lamp quantity be few and realize with low costs, if accomplish the LED lamp to the distance of diffusion plate equals the LED lamp of the one-half of the straight line distance between LED lamp and the LED lamp or reduce the LED lamp that equals three quarters quantity, all can lead to the bright and dark inequality, influences optical effect. Therefore, a direct type backlight module that solves the problems of large number of LEDs and/or thick light guide plate 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 three quarters compared with the number of 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 three-quarters 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 rows and a plurality of columns of semicircular grooves are formed in one side of the light-diffusing plate facing the plurality of LED lamps, and each semicircular groove is covered with one LED lamp; 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 0.5 × B1 is 0.5 × C1; 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 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 2 × B2 is 2 × C2.
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 semicircular grooves is equal to the number of the LED lamps.
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 the half slot that the multirow distributes towards one side of LED lamp, because every half slot cover establishes a LED lamp, and the surface of half slot is the curved surface, and luminous angle can increase, and the light on diffusion sheet surface is the mixed light that all direction LED lamps 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 LED lamps by three quarters compared with the number of 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.
A direct type light source device comprises the direct type backlight module.
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 three quarters 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, where a1 is 0.5 × 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 2 × B2 is 2 × C2.
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, a semicircular 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 5.
As shown in fig. 1 to 3, the direct type backlight module includes 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 1 has a cavity, and the PCB 2 is connected to the outer frame 1 and located in the 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, a plurality of rows and a plurality of columns of semicircular grooves 41 are formed in one side, facing the plurality of LED lamps 3, of the light-diffusing plate 4, and each semicircular groove 41 is covered with one LED lamp 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 the top cover at LED lamp 3 is equipped with the diffusion sheet 4, and the one side that diffusion sheet 4 was equipped with the semicircle trough 41 of multirow distribution towards LED lamp 3, because every semicircle trough 41 covers and establishes an LED lamp 3, because the surface of semicircle trough 41 is the curved surface, luminous angle can increase, and the light on diffuser 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 realize the small quantity of the LED lamps 3, thereby reducing the manufacturing cost; or the light guide plate is thinned.
Advantageously, the plurality of LED lamps 3 is distributed in a rectangular arrangement.
Optionally, 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 0.5 × B1 is 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 lamps 3 and the diffusion plate 5 is half of 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 also half of the distance between two adjacent rows of LED lamps 3, which means that the thickness of the light guide plate is reduced and half of the light guide plate is reduced compared with the distance between the LED lamps 3 and the diffusion plate 5 in the prior art, i.e. a1 is 0.5 × a', so as to meet the market demand. Of course, in some embodiments of the present invention, a1 ═ 0.5 × m1 × B1 ═ 0.5 × m2 × C1, and m1 and m2 are coefficients, where the optimal value of m1 is 1, the optimal value of m2 is 1, and m1 and m2 can float up and down at the optimal values.
Optionally, the number of the LED lamps is N, where N is an integer and N is greater than or equal to 2, an interval between the LED lamp 3 and the diffusion plate 5 is a2, an interval between two adjacent rows of the LED lamps 3 is B2, and an interval between two adjacent rows of the LED lamps 3 is C2, where a2 is 2 × B2 is 2 × C2.
It should be explained that, under the straight following formula backlight unit satisfied the even prerequisite of light brightness, the interval between LED lamp 3 and diffuser plate 5 equals the twice of the interval between two adjacent rows of LED lamps 3, simultaneously, the interval between LED lamp 3 and diffuser plate 5 equals the twice of the interval between two adjacent rows of LED lamps 3, but the utility model provides a quantity of LED lamp 3 has reduced three fourths for the quantity of LED lamp 3 among the prior art, and N is 1/4 XN', has further reduced manufacturing cost. Of course, in other embodiments of the present invention, the number of LED lamps 3 may be floated up and down by three quarters.
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 semicircular grooves 41 is equal to the number of the LED lamps 3, so that each LED lamp 3 can be covered by the semicircular groove 41, and the uniformity of light brightness is further ensured.
A direct light source device includes a direct backlight module. The direct type light source device can reduce the number of the LED lamps 3, thereby reducing the manufacturing cost; or/and the light guide plate is thinned.
The first embodiment is as follows:
as shown in fig. 1 to 4, the direct type backlight module includes an outer frame 1, a PCB 2, a plurality of LED lamps 3, a light-diffusing plate 4 and a diffusion plate 5, wherein the outer frame 1 has a concave cavity, and the PCB 2 is connected to the outer frame 1 and located above the concave cavity; the LED lamps 3 are distributed on the PCB 2 in multiple rows and multiple columns; the light-diffusing plate 4 covers 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 rows and a plurality of columns of distributed semicircular grooves 41, each semicircular groove 41 covers one LED lamp 3, the diffusion plate 5 covers the upper part of the outer frame 1, and the PCB 2, the LED lamps 3 and the light-diffusing plate 4 are limited in the inner 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, wherein a1 is 0.5 × B1 is 0.5 × C1. 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 semicircular grooves 41 is equal to that of the LED lamps 3.
Example two:
as shown in fig. 1 to 3 and 5, the direct type backlight module includes an outer frame 1, a PCB 2, a plurality of LED lamps 3, a light-diffusing plate 4 and a diffusion plate 5, wherein the outer frame 1 has a concave cavity, the PCB 2 is connected to the outer frame 1 and located above the concave cavity, and the plurality of LED lamps 3 are distributed on the PCB 2 in multiple rows; the light-diffusing plate 4 is covered above the plurality of LED lamps 3, a plurality of rows and a plurality of columns of semicircular grooves 41 are formed in one side, facing the plurality of LED lamps 3, of the light-diffusing plate 4, and each semicircular groove 41 is covered with one LED lamp 3; and a diffusion plate 5 is covered above the outer frame 1 to limit the PCB board 2, the LED lamp 3 and the light diffusion plate 4 in the inner cavity. 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 2 × B2 is 2 × C2. 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 semicircular grooves 41 is equal to that 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.
Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
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 (5)
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 structure comprises a light-diffusing plate (4), wherein the light-diffusing plate (4) covers the plurality of LED lamps (3), one side, facing the plurality of LED lamps (3), of the light-diffusing plate (4) is provided with a plurality of rows and columns of distributed semicircular grooves (41), and each semicircular groove (41) covers one LED lamp (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 0.5 × B1 is 0.5 × C1; 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 A2, the distance between two adjacent rows of the LED lamps (3) is B2, the distance between two adjacent rows of the LED lamps (3) is C2, and A2 is 2 × B2 is 2 × C2.
2. 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.
3. The direct type backlight module according to claim 1, wherein the light diffusion plate (4) is a polycarbonate plate or a polymethyl methacrylate plate.
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, comprising the direct-type backlight module as claimed in any one of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020021598.3U CN211475837U (en) | 2020-01-06 | 2020-01-06 | Direct type backlight module and light source device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020021598.3U CN211475837U (en) | 2020-01-06 | 2020-01-06 | Direct type backlight module and light source device |
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| CN211475837U true CN211475837U (en) | 2020-09-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138493A (en) * | 2021-04-07 | 2021-07-20 | 武汉华星光电技术有限公司 | Backlight module and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138493A (en) * | 2021-04-07 | 2021-07-20 | 武汉华星光电技术有限公司 | Backlight module and manufacturing method thereof |
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