Display device

Abstract

The utility model relates to the technical field of display equipment, and discloses a display device. The display device comprises a backlight module, a middle frame, a display panel and a supporting air bag, the backlight module comprises a back plate, a light guide plate and an optical film, the light guide plate and the optical film are sequentially stacked on the back plate, and the middle frame is connected with the back plate; the edge of the display panel is directly or indirectly supported on the middle frame, and the display panel and the optical film are oppositely arranged; the supporting air bag is made of a light guide material, the supporting air bag is clamped between the optical film and the display panel and used for supporting the display panel, the supporting air bag comprises a first air cavity, and the size of the first air cavity is adjustable. According to the display device, the display panel can be prevented from being pressed and deformed, the display panel which is pulled and deformed during assembly can be adjusted, and the problem of light leakage of the display panel in a black picture is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to display equipment technical field especially relates to a display device. BACKGROUND

[0002] Liquid crystal display device has light, low energy consumption, long life advantage, has obtained the extensive application. Figure 1 A kind of display device provided by prior art is partially cutaway view, as Figure 1 Shown, liquid crystal display device includes backlight module 10', middle frame 30' and display panel 20', wherein backlight module 10' includes backplate 11', light source (not shown in drawing), light guide plate 12' and optical film 13', light guide plate 12' and optical film 13' are sequentially stacked on backplate 11', light source can be set between light guide plate 12' and backplate 11' (direct type backlight module), can also be set in light guide plate 12' side (side type backlight module 1), middle frame 30' is supported on backplate 11', display panel 20' is supported on middle frame 30' and located above optical film 13'.

[0003] With the development of liquid crystal display device, large size display device is also more and more, however, due to the gap 40' between display panel 20' and optical film 13', when pressing display panel 20', it will cause local deformation of display panel 20', and further cause the problem of light leakage of display device in black picture;In addition, Figure 2 It is the schematic diagram that display panel provided by prior art is supported on middle frame, as Figure 2 Shown, display panel 20' is usually with certain warping form, and the edge of display panel 20' is fixed on middle frame 30' using foam rubber 50', so that display panel 20' can be also pulled and deformed locally during the installation of display panel 20', and further cause the problem of light leakage of display device in black picture.

[0004] Therefore, there is an urgent need for a display device to solve the above technical problems. Utility model content

[0005] The utility model aims at providing a kind of display device, can avoid display panel to be pressed deformation and adjust the display panel that is pulled and deformed when assembling, avoid the problem of light leakage of display panel in black picture.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Display device, comprising:

[0008] Backlight module, the backlight module includes backplate and light guide plate and optical film that are sequentially stacked on the backplate;

[0009] a middle frame connected with the back plate;

[0010] a display panel, an edge of the display panel being directly or indirectly supported on the middle frame, the display panel being oppositely arranged with the optical film sheet;

[0011] a supporting air bag made of light-guiding material, the supporting air bag being clamped between the optical film sheet and the display panel and used for supporting the display panel, the supporting air bag comprising a first air cavity, a volume of the first air cavity being adjustable.

[0012] As an optional solution, the display device comprises at least two supporting air bags, the at least two supporting air bags being sequentially arranged along a first direction.

[0013] As an optional solution, the middle frame is annularly arranged at the light guide plate and comprises a first supporting portion, the first supporting portion being located at a side of the optical film sheet away from the light guide plate, an end portion of the supporting air bag is provided with a slot, and at least part of the first supporting portion is inserted into the slot.

[0014] As an optional solution, the middle frame is annularly arranged at the light guide plate and comprises a first supporting portion, the first supporting portion being located at a side of the optical film sheet away from the light guide plate, a side of the first supporting portion is provided with a slot, an edge of the supporting air bag is provided with a protrusion, and the protrusion is inserted into the slot.

[0015] As an optional solution, the display device further comprises an air pipe, a first end of the air pipe being in communication with an inside of the supporting air bag, and a second end of the air pipe being selectively openable and configured to be in communication with an external air supply device.

[0016] As an optional solution, the supporting air bag is further provided with an insertion port, the insertion port being in communication with the first air cavity;

[0017] the first end of the air pipe is inserted into the insertion port, and the second end of the air pipe penetrates through the middle frame and the back plate.

[0018] As an optional solution, the middle frame is matched with the light guide plate and / or the optical film sheet, respectively, and the middle frame is provided with a second air cavity, so that the middle frame can be elastically deformed.

[0019] As an optional solution, the middle frame comprises a connecting portion and a first supporting portion, the connecting portion being connected with the back plate, the first supporting portion directly or indirectly abutting against a side of the optical film sheet away from the light guide plate, and at least part of the second air cavity is arranged in the first supporting portion.

[0020] As an optional solution, the middle frame comprises a connecting portion connected with the back plate and arranged around the side of the light guide plate, and the light guide plate and / or the optical film is abutted with the connecting portion at both ends in at least one direction, and at least part of the second air cavity is arranged in the connecting portion.

[0021] As an optional solution, the middle frame is integrally formed with the supporting air bag.

[0022] The display device has the following beneficial effects:

[0023] The display device has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a partial sectional view of a display device provided by the prior art;

[0025] Figure 2 is a schematic view of a display panel supported on a middle frame provided by the prior art;

[0026] Figure 3 is a partial sectional view of a display device provided by the embodiment one of the present application;

[0027] Figure 4 is a schematic view of a display panel cooperating with a supporting air bag provided by the embodiment one of the present application;

[0028] Figure 5 is a schematic view of a deformed display panel cooperating with a plurality of supporting air bags provided by the embodiment two of the present application;

[0029] Figure 6 is a partial sectional view of a display device provided by the embodiment three of the present application.

[0030] In the drawings:

[0031] 10', backlight module; 11', back plate; 12', light guide plate; 13', optical film; 20', display panel; 30', middle frame; 40', gap; 50', foam glue;

[0032] 10, backlight module; 11, back plate; 111, bottom plate; 112, side plate; 12, light guide plate; 13, optical film; 20, display panel; 31, support air bag; 311, first air cavity; 312, plug interface; 313, plug slot; 32, air pipe; 33, plug; 40, middle frame; 41, connecting part; 42, first support part; 43, second support part; 44, second air cavity; 50, front frame; 51, top plate; 52, peripheral plate. DETAILED DESCRIPTION

[0033] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only for explaining the utility model, not limiting the utility model. In addition, it needs to be explained that in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all the structures.

[0034] In the description of the utility model, unless there is explicit provision and limitation, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless there is explicit provision and limitation, the "upper" or "lower" of the first feature in the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "lower", "lower" and "lower" of the first feature in the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of the embodiment, the terms "upper", "lower", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0037] Example one

[0038] Figure 3is a partial cross-sectional view of a display device provided by the present embodiment, as Figure 3 As shown in the figure, the display device comprises a backlight module 10, a middle frame 40, a display panel 20 and a front frame 50. Among them, the middle frame 40 is installed on the backlight module 10, the edge of the display panel 20 is directly or spacedly supported on the middle frame 40 and is located on the upper side of the backlight module 10, and the front frame 50 is supported on the middle frame 40 and covers the edge of the display panel 20. In the present embodiment, the display panel 20 can be a liquid crystal display panel 20, the backlight module 10 is used to provide a light source for the liquid crystal display panel 20, and at the same time, the liquid crystal display panel 20 changes the orientation of the liquid crystal molecules by changing the electric field strength applied to the liquid crystal molecules, controls the strength of light transmission, and thus realizes the display of images.

[0039] Specifically, as shown in the figure, Figure 3 The backlight module 10 comprises a back plate 11, a lamp strip (not shown in the figure), a light guide plate 12 and an optical film 13. The back plate 11 comprises a bottom plate 111 and a side plate 112, the side plate 112 is connected to the edge of the bottom plate 111 and is arranged perpendicularly to the bottom plate 111, so that the back plate 11 is constructed as a box-shaped structure with an open upper side, and the light guide plate 12 and the optical film 13 are sequentially stacked on the bottom plate 111. In some embodiments, the lamp strip is arranged inside the side plate 112 and is arranged opposite to the light entrance surface of the light guide plate 12, and at this time, the backlight module 10 is a side-in backlight module. In some embodiments, the lamp strip is arranged between the light guide plate 12 and the bottom plate 111, and at this time, the backlight module 10 is a direct type backlight module.

[0040] As shown in the figure, Figure 3 The middle frame 40 is constructed as a ring, is arranged inside the bottom plate 111 and is located between the light guide plate 12 and the side plate 112. Specifically, the middle frame 40 comprises a connecting portion 41, a first supporting portion 42 and a second supporting portion 43, the connecting portion 41 is arranged at one side of the side plate 112 and is opposite to the end surface of the light guide plate 12 and the optical film 13. It should be noted that if the backlight module 10 is a side-in backlight module 10, the lamp strip is arranged between the first connecting portion 41 and the light guide plate 12. Alternatively, the connecting portion 41 can be connected with the back plate 11 by existing modes such as bonding, clamping, fastener connection, etc., which are not limited herein. The first supporting portion 42 extends from the side of the connecting portion 41 to form a cantilever structure and extends to the upper side of the optical film 13, so that the middle frame 40 can wrap the edges of the light guide plate 12 and the optical film 13, thereby preventing light leakage around the backlight module 10. The second supporting portion 43 extends upward from the connecting portion 41 to be flush with the side plate 112 and is used to support the front frame 50.

[0041] As shown in the figure, Figure 3As shown, the front frame 50 includes a top plate 51 and a peripheral plate 52, which are vertically arranged, the top plate 51 is supported at the upper end of the second support part 43 and the side plate 112, and the edge of the top plate 51 covers the edge of the display panel 20, and optionally, the edge of the display panel 20 and the top plate 51 can be bonded by double-sided adhesive. The peripheral plate 52 surrounds the outside of the side plate 112, thereby protecting the backlight module 10. Optionally, the front frame 50 can be made of metal material.

[0042] In the prior art, a gap is formed between the display panel and the optical film, and when the display panel is pressed, especially a large-size display panel, the display panel is locally deformed. In addition, when the edge of the display panel is fixed by foam adhesive, the display panel can also be locally stretched and deformed, and the above deformations can cause the display device to have light leakage problem in a black picture.

[0043] To this end, as shown in the drawings, Figure 3 The display device further includes a support air bag 31 made of light-guiding material and clamped between the optical film 13 and the display panel 20, the support air bag 31 is used to support the display panel 20, so that when the external force presses the display panel 20, the display panel 20 will not be locally deformed, thus avoiding the problem of light leakage of the display panel 20 in a black picture.

[0044] In addition, the first air cavity 311 is arranged in the support air bag 31, and the volume of the first air cavity 311 is adjustable. Figure 4 is a schematic view of the display panel cooperating with a support air bag 31 provided by the present embodiment, as shown in the drawings, Figure 3 and Figure 4 When the display panel 20 is assembled and locally deformed due to stretching, the volume of the first air cavity 311 can be adjusted to change the overall shape and size of the support air bag 31, thereby correcting the deformed and recessed area of the display panel 20, so that the display panel 20 can be restored to its own degree of warping as shown in the drawings, Figure 4 greatly improving the local deformation of the display panel 20 and avoiding the problem of light leakage of the display panel 20 in a black picture. Without the need to disassemble the display device and then correct the display panel 20, the assembly yield and production efficiency of the display device are greatly improved.

[0045] In the present embodiment, as shown in the drawings, Figure 4 The display device includes a support air bag 31, which is generally in a plate structure to uniformly support the lower side of the display panel 20. It can be understood that the support air bag 31 is preferably made of a material with high transmittance, so as to minimize the light energy loss caused by the support air bag 31. Optionally, the support air bag 31 can be made of PET material (polyethylene terephthalate), PMMA material (polymethyl methacrylate), etc.

[0046] In some embodiments, as shown in Figure 3 The end of the supporting air bag 31 is provided with a slot 313, and the first supporting part 42 is inserted into the slot 313. The supporting air bag 31 is fixed by the insertion of the first supporting part 42. In addition, the insertion method can make the edge of the supporting air bag 31 extend below the edge of the display panel 20, so as to support the display panel 20 more comprehensively. Alternatively, the supporting air bag 31 can be provided with a slot 313 at both ends of the first direction, and the first supporting part 42 is inserted into the corresponding slot 313. In other embodiments, the supporting air bag 31 can be provided with a slot 313 at both ends of the first direction and both ends of the second direction. The four slots 313 are inserted into the corresponding slots 313 of the first supporting part 42, so as to improve the fixing firmness of the supporting air bag 31. In the embodiment, the second direction and the first direction are perpendicular to each other, and both are parallel to the light guide plate 12.

[0047] In some embodiments (not shown), the side of the first supporting part 42 is provided with a slot 313, and the edge of the supporting air bag 31 is provided with a protrusion which is inserted into the slot 313. This scheme can also achieve the fixation of the supporting air bag 31. It can be understood that in other embodiments, the supporting air bag 31 can also be fixed to the first supporting part 42 by adhesion.

[0048] In order to adjust the volume of the first air cavity 311, as shown in Figure 3 The display device further comprises an air pipe 32. The first end of the air pipe 32 is in communication with the inside of the supporting air bag 31, and the second end of the air pipe 32 can be selectively opened and configured to be in communication with an external air supply device. In the process of assembling the display device, the second end of the air pipe 32 is always in a closed state (such as being sealed by a plug 33), so as to ensure the shape and volume of the supporting air bag 31 to be stable. When the display device is assembled and the display effect of the display device is detected, if it is detected that there is no light leakage when the display panel 20 displays a black picture, the supporting air bag 31 is not operated again, so as to ensure that the display panel 20 can be reliably supported, and when the display panel 20 is pressed later, the supporting air bag 31 will not be deformed and the problem of light leakage in a black picture will not occur. If it is detected that there is light leakage when the display panel 20 displays a black picture, the second end of the air pipe 32 is opened and connected to the external air supply device. The air supply device corrects the local deformation of the display panel 20 by inflating or repeatedly inflating and deflating the supporting air bag 31, until it is detected that there is no light leakage when the display panel 20 displays a black picture, and then the second end of the air pipe 32 is sealed.

[0049] As shown in Figure 3As shown, the support air bag 31 is further provided with a plug interface 312, the plug interface 312 is in communication with the first air cavity 311; the first end of the air pipe 32 is plugged into the plug interface 312, and the second end of the air pipe 32 penetrates the middle frame 40 and the back plate 11. When assembling the display device, the back light module 10 and the middle frame 40 can be assembled first, then the un-inflated support air bag 31 is assembled with the middle frame 40, and then the first end of the air pipe 32 is sequentially inserted into the first plug interface 312 of the support air bag 31 through the side plate 112 and the middle frame 40, at this time the second end of the air pipe 32 is located outside the back light module 10, thereby facilitating the connection with the external inflation device, the inflation device inflates the support air bag 31 through the air pipe 32, so that the volume of the first air cavity 311 reaches a predetermined size, so as to support the display panel 20. Then the display panel 20 and the front frame 50 are assembled, and the display panel 20 is detected.

[0050] In this embodiment, the second end of the air pipe 32 also penetrates the front frame 50, so that when the display device is detected to leak light in a black picture, the second end of the air pipe 32 can be connected with the external air supply device without disassembling the front frame 50. In other embodiments (not shown), a avoiding hole opposite to the air pipe 32 can also be provided on the front frame 50, when the display device is detected to leak light in a black picture, the air outlet end of the external air supply device can be connected with the second end of the air pipe 32 through the avoiding hole, and the front frame 50 does not need to be disassembled.

[0051] In this embodiment, the air pipe 32 is arranged on the side of the first support portion 42 away from the light guide plate 12, so that the problem of light leakage of the back light module 10 caused by the lead-out of the air pipe 32 can be avoided. Of course, in other embodiments, the plug interface 312 of the support air bag 31 can also be arranged on the lower side of the first support portion 42, and the second end of the air pipe 32 penetrates the bottom plate 111 downward and extends to the outside of the display device, which can also facilitate the connection of the second end of the air pipe 32 with the external air supply device.

[0052] Embodiment Two

[0053] This embodiment provides a display device, which has the same structure as embodiment one, and the same parts will not be repeated. The difference is mainly in the number of support air bags 31, which is as follows:

[0054] Figure 5 is a schematic view of the display panel provided in this embodiment cooperating with the support air bag, as Figure 5As shown, the display device includes at least two supporting air bags 31 arranged side by side along the first direction. Therefore, when the display panel 20 locally leaks light in a black picture due to local deformation, the shape of the part can be corrected by adjusting the volume of the supporting air bag 31 at the corresponding position and its vicinity, so that the shape correction of the display panel 20 is more targeted, and the effect and efficiency of the shape correction of the display panel 20 can be improved. In this embodiment, the display device includes a plurality of supporting air bags 31 arranged in sequence along the first direction, the second end of each supporting air bag 31 is provided as a slot 313, and is inserted and matched with the first supporting part 42 of the middle frame 40. Of course, the adjacent supporting air bags 31 can also be fixed by high-transparency glue.

[0055] Embodiment Three

[0056] This embodiment provides a display device, which has substantially the same structure as that of Embodiment One, and the same parts will not be described again. The difference mainly lies in the setting mode of the middle frame 40, which is as follows:

[0057] Figure 6 is a partial cross-sectional view of the display device provided in this embodiment, as Figure 6 shown, in this embodiment, the middle frame 40 cooperates with the light guide plate 12 and the optical film 13, and the middle frame 40 is provided with a second air cavity 44, which enables the middle frame 40 to elastically deform. Therefore, when designing the display device, the size of the middle frame 40 can be set slightly smaller, and based on the elastic deformation of the middle frame 40, the smooth assembly of the light guide plate 12 and the optical film 13 can be ensured, and after assembly, the middle frame 40 can reliably and tightly cooperate with the light guide plate 12 and the optical film 13 to limit the light guide plate 12 and the optical film 13, thereby avoiding the occurrence of abnormal sound due to the position shift of the light guide plate 12 and the optical film 13.

[0058] In this embodiment, the middle frame 40 can be made of black PET material (polyethylene terephthalate), PMMA material (polymethyl methacrylate), etc., which is convenient for forming the second air cavity 44 and does not have the problem of light leakage.

[0059] Specifically, as Figure 6As shown, the light guide plate 12 and the optical film 13 are respectively abutted with the connecting portion 41 at two ends in at least one direction. In the embodiment, the light guide plate 12 and the optical film 13 are abutted with the connecting portion 41 at two ends in the first direction, and the at least partial second air cavity 44 is arranged in the connecting portion 41. The arrangement makes the connecting portion 41 have a certain elastic deformation capacity, so that the optical film 13 and the light guide plate 12 can be smoothly loaded into the middle frame 40, and the connecting portion 41 can elastically abut against the optical film 13 and the light guide plate 12 to ensure that the positions of the two are not shifted. It can be understood that, for the direct type backlight module 10, the light guide plate 12 and the optical film 13 can also be abutted with the connecting portion 41 at two ends in the first direction and at two ends in the second direction.

[0060] As shown in the figure, Figure 6 The first supporting portion 42 abuts against the side of the optical film 13 away from the light guide plate 12 through the supporting air bag 31, and the at least partial second air cavity 44 is arranged in the first supporting portion 42. Thus, the first supporting portion 42 has a certain elastic deformation capacity, and on the basis of ensuring that the first supporting portion 42 and the bottom plate 111 can accommodate the optical film 13 and the light guide plate 12, the optical film 13 and the light guide plate 12 can be compressed, so as to avoid the positions of the two being shifted.

[0061] Optionally, in the embodiment, one second air cavity 44 is arranged in the middle frame 40, and the second air cavity 44 is partially located in the connecting portion 41 and partially located in the first supporting portion 42. The arrangement makes the forming of the middle frame 40 more convenient. In other embodiments, two second air cavities 44 can be arranged in the middle frame 40, one of the second air cavities 44 is arranged in the connecting portion 41, and the other second air cavity 44 is arranged in the first supporting portion 42.

[0062] In another embodiment, the middle frame 40 and the supporting air bag 31 can be integrally formed, so as to improve the assembly efficiency, but it is necessary to ensure that the supporting air bag 31 is partially made of high-transmittance material and the middle frame 40 is partially made of black material which does not transmit light.

[0063] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For the ordinary skilled in the art, according to the thought of the utility model, the specific embodiments and application range can be changed, and the content of the specification should not be understood as the limitation of the utility model. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A display device, characterized by The display device comprises: a backlight module (10) comprising a back plate (11), a light guide plate (12) and an optical film (13) which are sequentially stacked on the back plate (11); a middle frame (40) connected with the back plate (11); a display panel (20) whose edges are directly or indirectly supported on the middle frame (40), and the display panel (20) is arranged opposite to the optical film (13); a supporting air bag (31) made of light guide material, which is arranged between the optical film (13) and the display panel (20) and used for supporting the display panel (20), and the supporting air bag (31) comprises a first air cavity (311) whose volume is adjustable.

2. The display device of claim 1, wherein, The display device comprises at least two supporting air bags (31) which are sequentially arranged along a first direction.

3. The display device of claim 1, wherein The middle frame (40) is arranged around the light guide plate (12) and comprises a first supporting portion (42) which is located on a side of the optical film (13) away from the light guide plate (12), and an end portion of the supporting air bag (31) is provided with a slot (313), and at least part of the first supporting portion (42) is inserted into the slot (313).

4. The display device of claim 1, wherein The middle frame (40) is arranged around the light guide plate (12) and comprises a first supporting portion (42) which is located on a side of the optical film (13) away from the light guide plate (12), and a side of the first supporting portion (42) is provided with a slot (313), and an edge of the supporting air bag (31) is provided with a protrusion which is inserted into the slot (313).

5. The display device of claim 1, wherein The display device further comprises an air pipe (32) whose first end communicates with an inside of the supporting air bag (31), and a second end of the air pipe (32) can be selectively opened and configured to communicate with an external air supply device.

6. The display device of claim 5, wherein, The supporting air bag (31) is further provided with an insertion port (312) which communicates with the first air cavity (311); The first end of the air pipe (32) is inserted into the insertion port (312), and the second end of the air pipe (32) penetrates through the middle frame (40) and the back plate (11).

7. A display device as claimed in any one of claims 1-6, characterized in that The middle frame (40) cooperates with the light guide plate (12) and / or the optical film (13), and a second air cavity (44) is arranged in the middle frame (40) so that the middle frame (40) can be elastically deformed.

8. The display device of claim 7, wherein, The middle frame (40) comprises a connecting portion (41) connected with the back plate (11) and a first supporting portion (42) which directly or indirectly abuts against a side of the optical film (13) away from the light guide plate (12), and at least part of the second air cavity (44) is arranged in the first supporting portion (42).

9. The display device of claim 7, wherein, The middle frame (40) comprises a connecting portion (41) connected with the back plate (11) and arranged around the side of the light guide plate (12), and the light guide plate (12) and / or the optical film (13) abut against the connecting portion (41) at least at both ends in one direction, and at least part of the second air cavity (44) is arranged in the connecting portion (41).

10. The display device of claim 7, wherein The middle frame (40) is integrally formed with the supporting air bag (31).

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