CN215895181U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN215895181U CN215895181U CN202121677721.8U CN202121677721U CN215895181U CN 215895181 U CN215895181 U CN 215895181U CN 202121677721 U CN202121677721 U CN 202121677721U CN 215895181 U CN215895181 U CN 215895181U
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Abstract
The utility model provides a backlight module and display device belongs to and shows technical field. The backlight module of this disclosure includes: the backboard comprises a bottom board and a first side wall connected with the bottom board, wherein the first side wall comprises a plurality of sub side walls, each sub side wall is connected with the bottom board, and a first opening is defined between any adjacent sub side walls; a plurality of first slots are arranged on the sub side wall; the backlight lamp panel is fixedly arranged on the bottom plate; the flexible circuit board is bound and connected with the backlight lamp panel; a flexible circuit board is arranged at a first opening position and penetrates out of the back plate from the first opening position; the diffusion plate is arranged on one side, away from the base plate, of the backlight lamp plate and comprises a main body part and a first protruding part connected with the main body part, and one first protruding part is inserted into one first slot; and the sealing assembly is positioned between the flexible circuit board and the diffusion plate and fills the first opening.
Description
Technical Field
The disclosure belongs to the technical field of display, and particularly relates to a backlight module and a display device.
Background
With the continuous development of vehicle-mounted technology, vehicle-mounted display devices have become an important component of automobiles. The conventional on-vehicle display device is generally a liquid crystal display device, and may be installed behind a dashboard, a roof, or a seat back to display an image.
The conventional liquid crystal display device includes a liquid crystal display panel and a backlight module. In order to reduce the power consumption of the lcd device and improve the contrast of the display image, the lcd device uses a Local Dimming (i.e., Local backlight adjustment) technique, i.e., the brightness of different areas of the backlight module is adjusted according to the brightness of different positions of the image displayed by the lcd panel. The direct type backlight module is matched with a local backlight adjusting technology, so that the power consumption of the liquid crystal display device can be better reduced, and the contrast of a display picture can be better improved.
SUMMERY OF THE UTILITY MODEL
The present disclosure is directed to at least one of the problems of the prior art, and provides a backlight module and a display device.
In a first aspect, an embodiment of the present disclosure provides a backlight module, including:
the backboard comprises a bottom board and a first side wall connected with the bottom board, wherein the first side wall comprises a plurality of sub side walls, each sub side wall is connected with the bottom board, and a first opening is defined between any adjacent sub side walls; a plurality of first slots are formed in the sub side wall;
the backlight lamp panel is fixedly arranged on the bottom plate;
the flexible circuit board is bound and connected with the backlight lamp panel; the flexible circuit board is arranged at the first opening position and penetrates out of the back plate from the first opening position;
the diffusion plate is arranged on one side, away from the bottom plate, of the backlight lamp plate and comprises a main body part and first protruding parts connected with the main body part, and one first protruding part is inserted into one first slot;
and the sealing assembly is positioned between the flexible circuit board and the diffusion plate and fills the first opening.
Optionally, the backlight module further comprises an optical film material, the optical film material is arranged on one side of the diffusion plate, which is far away from the backlight panel, and the optical film material is provided with a second protruding part;
the back plate further comprises a second side wall, the second side wall is provided with a first surface and a second surface which are oppositely arranged, the first surface is connected with the bottom plate, and a first limiting groove is formed in the second surface;
wherein, the second bulge is inserted with the first limit groove.
Optionally, the back plate further includes a third side wall opposite to the second side wall, the third side wall is connected to the bottom plate, and a second limiting groove is formed in the third side wall;
the optical film material is also provided with a third bulge, and the third bulge is spliced with the second limiting groove.
Optionally, a third limiting groove and a fourth limiting groove are further formed in the second side wall and located on two sides of the first limiting groove;
the optical film material is also provided with a fourth bulge and a fifth bulge, the fourth bulge is connected with the third limiting groove in an inserting mode, and the fifth bulge is connected with the fourth limiting groove in an inserting mode.
Optionally, the backlight module further includes a rubber frame, and the rubber frame is disposed around the third sidewall of the back plate;
the rubber frame is provided with an opening, and the opening is arranged corresponding to the second limiting groove.
Optionally, a second slot is further disposed on the second side wall, a sixth protruding portion is disposed on the diffusion plate, and the second slot is connected with the sixth protruding portion in an inserted manner.
Optionally, the first limiting groove has a bottom edge extending in the same direction as the second surface of the second sidewall, and the bottom edge has a plurality of steps.
Optionally, the second protrusion has a plurality of sub-protrusions, and the sub-protrusions are disposed corresponding to the steps of the bottom side.
Optionally, the backlight module further includes a bonding structure, and the flexible circuit board is connected to the bottom plate through the bonding structure.
In a second aspect, an embodiment of the disclosure provides a display device, including the backlight module.
Drawings
Fig. 1 is a cross-sectional view of a backlight module according to an embodiment of the disclosure;
FIG. 2 is an assembly view of the backlight panel and the back plate;
FIG. 3 is a partial view of the diffuser plate and sidewalls assembled together;
FIG. 4 is a partial structural view of the first sidewall;
FIG. 5 is an assembly view of the optical film and the back plate;
FIG. 6 is an enlarged view of a portion of the portion A of FIG. 5;
FIG. 7 is a partial enlarged view of the position B in FIG. 5;
fig. 8 is a partial structural view of the third sidewall.
Detailed Description
For a better understanding of the technical aspects of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
It should be noted that the shape of the backlight module corresponds to the shape of the display panel, and the shape of the conventional display panel is usually rectangular, so in the embodiment of the present invention, the back plate includes a bottom plate and four sidewalls, and the shape of the bottom plate is rectangular.
In a first aspect, an embodiment of the present disclosure provides a backlight module, and fig. 1 is a cross-sectional view of the backlight module provided in the embodiment of the present disclosure, as shown in fig. 1, the backlight module includes a back plate 1, a backlight panel 2, a diffuser plate 3, an optical film 4, a rubber frame 5, and a display panel 7. The back plate includes a bottom plate 111 and a side wall 112, the bottom plate 111 is connected to the side wall 112, the bottom plate 111 and the side plate 112 may be substantially vertically disposed, and the bottom plate 111 and the side wall 112 form an accommodating space. The backlight panel 2 is fixedly arranged on the bottom plate 111, and a diffusion plate 3 and an optical film 4 are arranged in a containing space surrounded by the bottom plate 111 and the side wall 112. The glue frame 5 is fixed on the side wall 112 for horizontally supporting the display panel 7, and the display panel 7 is fixed on the glue frame 5 through the double-sided adhesive tape 6.
The back plate 1 may be an integrally formed structure, for example, a metal material is subjected to a stamping process to form the back plate 1. The material of the back plate 1 may include metal such as iron and aluminum, or plastic, for example. For example, the back plate 1 may be made of an aluminum plate material, so that the weight of the back plate 1 may be reduced while the structural strength of the back plate 1 is ensured.
The backlight panel 2 includes a backlight module including a circuit board and a plurality of light sources for irradiating light to the display area of the display panel 7, and the light sources may be Mini LEDs (Mini light emitting diodes) with a size of about 100 μm. It should be understood that the light source is not limited to the use of mini-leds, and that other types of light emitting devices may be used.
The optical film 4 may include a diffusion sheet (41,42), a quantum dot film 43, a prism sheet 44, and a reflective polarizer 45. The quantum dot film 43 in this embodiment can achieve a perfect high color gamut image quality effect, and the principle is to use a high-frequency light source, for example, the most commonly used blue light excites the quantum dot film to generate various color spectrums. For example, the quantum dot film 43 may include red, green, blue, etc. quantum dot regions, and the backlight module may use leds capable of emitting blue light to excite the red, green, and blue light quantum dot regions to emit red, green, and blue light, respectively, and the red, blue, and green light are mixed to realize the white light effect. The diffusion sheets (41,42) are used to provide a uniform surface light source to the display panel. The prism sheet 44 is used to improve the front brightness of the display panel. The reflective polarizer 45 is used to improve the utilization of light. The optical film 4 is not limited to the above structure, and the optical film includes 2 diffusion sheets in this embodiment.
The backlight module can also comprise a circuit board, and the circuit board can be used for driving the light-emitting device to emit light, so that the circuit board is electrically connected with the light-emitting device. Among them, the Circuit board may be, for example, a Printed Circuit Board (PCB) or a Flexible Circuit board (FPC), and the Flexible Circuit board has characteristics of high wiring density, thin thickness, high reliability, strong flexibility, and the like, and thus, in the embodiment of the present invention, the Circuit board is preferably a Flexible Circuit board.
Fig. 2 is an assembly diagram of the backlight panel and the back plate, and fig. 3 is a partial assembly diagram of the diffuser plate and the sidewall. As shown in fig. 2 to 3, the back plate 1 includes a bottom plate 111 and a first side wall 112 connected to the bottom plate 111, the first side wall 112 includes a plurality of sub-side walls 1121, each sub-side wall 1121 is connected to the bottom plate 111, a first opening 8 is defined between any adjacent sub-side walls 1121, and a plurality of first slots 9 are disposed on the sub-side walls 1121. In the accommodation space enclosed by bottom plate 111 and first lateral wall 112, backlight panel 2 is fixed to be set up on bottom plate 111, for example, backlight panel 2 can lead to the fixed setting of heat-conducting glue on bottom plate 111. The flexible circuit board 10 is bound with the backlight lamp plate 2 and is connected, and a flexible circuit board 10 is arranged at a first opening 8 position and penetrates out of the backboard 1 from the first opening 8 position. As shown in fig. 3, the diffusion plate 3 is disposed on a side of the backlight panel 1 away from the bottom plate 111, the diffusion plate 3 includes a main body portion (not shown in the figure) and a first protrusion portion (not shown in the figure) connected to the main body portion, and one first protrusion portion is inserted into one first slot 9.
It should be noted that the number of the first openings 8 and the number of the flexible circuit boards 10 are not specifically limited, and those skilled in the art can set the first openings according to actual situations, and this embodiment takes four first openings 8 and four flexible circuit boards 10 as an example for description.
In the present embodiment, as shown in fig. 3, since there is a gap between the diffusion plate 3 and the flexible circuit board 10 at the first opening 8, there is a risk of light leakage, dust ingress, and moisture ingress.
Based on this, as shown in fig. 4, the backlight module provided in the embodiment of the present disclosure further includes a sealing assembly 11, where the sealing assembly 11 is located between the flexible circuit board 10 and the diffusion plate 3, and fills the first opening 8, so as to play a role of filling a gap between the diffusion plate 3 and the flexible circuit board 10, thereby achieving the effects of light leakage prevention, dust prevention, and water vapor prevention, and prolonging the service life of the backlight module.
The type of the sealing assembly is not particularly limited in the embodiments of the present disclosure, for example, a gap between the circuit board and the diffusion plate may be filled with foam. The foam rubber has certain elasticity after being solidified, can play a role in plugging, and achieves the effects of light leakage prevention, dust prevention and water vapor prevention.
In some embodiments, fig. 5 is an assembly diagram of an optical film and a back plate, and fig. 6 is a partial enlarged view of a position a in fig. 5; fig. 7 is a partially enlarged view of a portion B in fig. 5. As shown in fig. 5-7, the backlight module further includes an optical film material 4, the optical film material 4 is disposed on a side of the diffuser plate 3 departing from the backlight panel 2, and the optical film material 4 has a second protrusion 12. The second side wall 113 of the back plate 1 has a first surface and a second surface which are oppositely arranged, the first surface is connected with the bottom plate 111, the second surface is provided with a first limiting groove 13, and the first limiting groove 13 is inserted into the second protrusion 12. It will be appreciated that in alternative embodiments, the first position-limiting groove 13 and the second protrusion 12 may also be linked by other methods, such as bonding the first position-limiting groove 13 and the second protrusion 12 by using double-sided adhesive. The specific manner is not particularly limited, as long as the first limit groove 13 and the second protrusion 12 can be fixedly connected.
In this embodiment, because set up second bulge 12 at blooming material 4, set up spacing groove 13 on second lateral wall 113 of backplate 1, first spacing groove 13 is pegged graft with second bulge 12, consequently, has reached the effect that adopts backplate 1 fixed blooming material 4, has solved current straight following formula lamp plate module structure, can't do the problem of boss in order to fix blooming material 4 on diffuser plate 3.
In some embodiments, as shown in fig. 7, the back plate 1 further includes a third sidewall 114 disposed opposite to the second sidewall 113, the third sidewall 114 is connected to the bottom plate 111, and the second limiting groove 14 is disposed on the third sidewall 114. The optical film material 4 further has a third protrusion 15, and the third protrusion 15 is inserted into the second limiting groove 14. The position where the second limit groove 14 is provided, and the shape and size of the second limit groove 14 may be set according to circumstances, and are not particularly limited herein.
In this embodiment, the third sidewall 114 is provided with a second limiting groove 14, and the third protruding portion 15 of the optical film 4 is inserted into the second limiting groove 14, so that the optical film is limited and can be limited from rotating.
In some embodiments, in order to fix the optical film more firmly, as shown in fig. 5, a third position-limiting groove 16 and a fourth position-limiting groove 17 may be further disposed on the second sidewall and located at both sides of the first position-limiting groove 13. The optical film material 4 further has a fourth protrusion (not shown) and a fifth protrusion (not shown), the fourth protrusion is inserted into the third limiting groove 16, and the fourth protrusion is inserted into the fourth limiting groove 17. The third limiting groove 16 and the fourth limiting groove 17 may be the same as or different from the second limiting groove 14, and the third limiting groove 16, the fourth limiting groove 17 and the second limiting groove 14 are the same in this embodiment as an example for description. Of course, more limiting grooves may be provided, which are not limited in detail herein.
In this embodiment, the third limiting groove 16 and the fourth limiting groove 17 located at two sides of the first limiting groove 13 are disposed on the second side wall 113, so that the optical film material 4 is further limited, and the rotation of the optical film material 4 is limited.
In some embodiments, fig. 8 is a schematic partial structure view of a third sidewall of the backlight module provided in the embodiments of the present disclosure, as shown in fig. 7 and 8, the backlight module further includes a rubber frame 18, and the rubber frame 18 is disposed around the sidewall of the back plate 1. The rubber frame is provided with an opening 19, and the opening 19 is arranged corresponding to the second limit groove 14.
Because the optical film material 4 expands at a high temperature, in this embodiment, the opening 19 corresponding to the second limiting groove 14 is disposed on the rubber frame 18, so that the rubber frame 18 is prevented from limiting the expansion of the optical film material 4, and an expansion space is provided for the optical film material 4.
In some embodiments, as shown in fig. 5, a second slot 20 is further disposed on the second sidewall, and a sixth protrusion (not shown) is disposed on the diffuser plate, wherein the second slot 20 is plugged into the sixth protrusion.
In this embodiment, the diffusion plate 3 is fixed by inserting the sixth protruding portion on the diffusion plate 3 into the second slot 20 further disposed on the second side wall 113. It is understood that, in order to make the fixation of the diffusion plate 3 more stable, a slot is also provided on the third sidewall 114 opposite to the second sidewall 113, and the diffusion plate 3 is correspondingly provided with a corresponding protrusion. The number and shape of the slots and the protruding portions may be set according to specific situations, and are not limited herein.
In some embodiments, as shown in fig. 6, the first limiting groove 13 has a bottom side extending in the same direction as the second surface of the second sidewall 113, and the bottom side has a plurality of steps. The second protrusion 12 of the optical film 4 has a plurality of sub-protrusions (121-125), and the sub-protrusions (121-125) are disposed corresponding to the steps on the bottom side of the first limiting groove 13.
In this embodiment, the optical film 4 includes a reflective polarizer, a prism sheet, a quantum dot film, a first diffusion sheet and a second diffusion sheet as an example, in this embodiment, each film is stacked, as shown in fig. 5, the reflective polarizer has a first sub-protrusion 121, the prism sheet has a second sub-protrusion 122, the quantum dot film has a third sub-protrusion 123, the first diffusion sheet has a fourth sub-protrusion 124, and the second diffusion sheet has a fifth sub-protrusion 125. Correspondingly, the first limiting groove 13 is stepped, that is, the first limiting groove has five grooves, the first groove corresponds to the first sub-protrusion 121 of the reflective polarizer, the second groove corresponds to the second sub-protrusion 122 of the prism sheet, the third groove corresponds to the third sub-protrusion 123 of the quantum dot film, the fourth groove corresponds to the fourth sub-protrusion 124 of the first diffusion sheet, and the fifth groove corresponds to the fifth sub-protrusion 125 of the second diffusion sheet. The depth of the first groove is the same as the thickness of the reflection-type polarizer, the thickness of the second groove is the same as that of the prism sheet, the thickness of the third groove is the same as that of the quantum dot film, the thickness of the fourth groove is the same as that of the first diffusion sheet, and the thickness of the fifth groove is the same as that of the second diffusion sheet.
In this embodiment, the first limiting groove 13 has a bottom edge that is the same as the extending direction of the second surface of the second sidewall 113, the bottom edge has a plurality of steps, and the second protrusion 12 of the optical film 4 has a plurality of sub-protrusions (121-125), the plurality of sub-protrusions (121-125) are disposed corresponding to the steps on the bottom edge of the first limiting groove 13, so that the optical film 4 is more stably fixed, the optical film 4 is prevented from rotating, and the product quality of the backlight module is improved.
In some embodiments, as shown in fig. 2, the backlight module further includes an adhesive structure 21, and at the first opening 8, the flexible circuit board 10 is bound and connected to the base plate 111 through the adhesive structure 21.
In this embodiment, at first opening 8 department, flexible circuit board 10 one end is bound through bonding structure 21 and is connected with bottom plate 111, when the other end of flexible circuit board 10 was pegged graft with other devices, can effectively prevent that stress from transmitting to the position of binding, has avoided the position of binding to tear and has leaded to the problem that backlight lamp plate 2 is luminous.
In a second aspect, an embodiment of the present disclosure provides a display device, including any one of the above-mentioned backlight module and a display panel, where the display panel is disposed on a side of the optical film material 4 of the backlight module, the side being away from the back plate 1.
The display device may be: the display device comprises any product or component with a display function, such as a liquid crystal panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
Of course, other conventional structures, such as a power supply unit, a display driving unit, and the like, may also be included in the display device of the present embodiment.
It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present disclosure, and that the present disclosure is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and these are to be considered as the scope of the disclosure.
Claims (10)
1. A backlight module, comprising:
the backboard comprises a bottom board and a first side wall connected with the bottom board, wherein the first side wall comprises a plurality of sub side walls, each sub side wall is connected with the bottom board, and a first opening is defined between any adjacent sub side walls; a plurality of first slots are formed in the sub side wall;
the backlight lamp panel is fixedly arranged on the bottom plate;
the flexible circuit board is bound and connected with the backlight lamp panel; the flexible circuit board is arranged at the first opening position and penetrates out of the back plate from the first opening position;
the diffusion plate is arranged on one side, away from the bottom plate, of the backlight lamp plate and comprises a main body part and first protruding parts connected with the main body part, and one first protruding part is inserted into one first slot;
and the sealing assembly is positioned between the flexible circuit board and the diffusion plate and fills the first opening.
2. The backlight module according to claim 1, further comprising an optical film disposed on a side of the diffusion plate facing away from the backlight panel, the optical film having a second protrusion;
the back plate further comprises a second side wall, the second side wall is provided with a first surface and a second surface which are oppositely arranged, the first surface is connected with the bottom plate, and a first limiting groove is formed in the second surface;
wherein, the second bulge is inserted with the first limit groove.
3. The backlight module according to claim 2, wherein the back plate further comprises a third sidewall opposite to the second sidewall, the third sidewall is connected to the bottom plate, and a second position-limiting groove is disposed on the third sidewall;
the optical film material is also provided with a third bulge, and the third bulge is spliced with the second limiting groove.
4. The backlight module as claimed in claim 3, wherein the second sidewall further has a third position-limiting groove and a fourth position-limiting groove disposed at two sides of the first position-limiting groove;
the optical film material is also provided with a fourth bulge and a fifth bulge, the fourth bulge is connected with the third limiting groove in an inserting mode, and the fifth bulge is connected with the fourth limiting groove in an inserting mode.
5. The backlight module according to claim 3, further comprising a glue frame disposed around the third sidewall of the back plate;
the rubber frame is provided with an opening, and the opening is arranged corresponding to the second limiting groove.
6. The backlight module according to any of claims 2-4, wherein a second slot is further disposed on the second sidewall, and a sixth protrusion is disposed on the diffuser plate, and the second slot is inserted into the sixth protrusion.
7. The backlight module according to any of claims 2-4, wherein the first position-limiting groove has a bottom side extending in the same direction as the second surface of the second sidewall, and the bottom side has a plurality of steps.
8. The backlight module according to claim 7, wherein the second protrusion has a plurality of sub-protrusions corresponding to the steps of the bottom side.
9. The backlight module according to claim 1, further comprising an adhesive structure, wherein the flexible circuit board is connected to the base plate via the adhesive structure.
10. A display device comprising a backlight module according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121677721.8U CN215895181U (en) | 2021-07-22 | 2021-07-22 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121677721.8U CN215895181U (en) | 2021-07-22 | 2021-07-22 | Backlight module and display device |
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| CN215895181U true CN215895181U (en) | 2022-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023207924A1 (en) * | 2022-04-29 | 2023-11-02 | 高创(苏州)电子有限公司 | Backlight module, display module, and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023207924A1 (en) * | 2022-04-29 | 2023-11-02 | 高创(苏州)电子有限公司 | Backlight module, display module, and display device |
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