CN111182775A - Display screen - Google Patents
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- CN111182775A CN111182775A CN202010162224.8A CN202010162224A CN111182775A CN 111182775 A CN111182775 A CN 111182775A CN 202010162224 A CN202010162224 A CN 202010162224A CN 111182775 A CN111182775 A CN 111182775A
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- China
- Prior art keywords
- display screen
- heat dissipation
- display
- circuit board
- flexible circuit
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
- H05K7/20963—Heat transfer by conduction from internal heat source to heat radiating structure
Abstract
The invention provides a display screen, which solves the problem of abnormal display of the display screen in the prior art caused by heat generated by a driving chip. The display screen comprises a display screen main body, a display side and a non-display side, wherein the display side and the non-display side are oppositely arranged; the flexible circuit board is bound and connected with the display screen main body and then arranged on the non-display side of the display screen main body in a bending mode; and the first heat dissipation piece is clamped between the display screen main body and the flexible circuit board.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display screen.
Background
As flexible products gradually pursue a narrow frame trend, the frame of the display screen becomes narrower and narrower. In order to realize a narrow bezel, the display main body and the driver chip are usually bound together, and then the driver chip is bent and fixed on the non-display surface of the display main body. However, the driving chip generates heat during operation, and the heat may cause abnormal display problems such as black spots, dark spots, color unevenness, etc. on the main body of the display screen directly above the driving chip, thereby affecting the display effect.
Disclosure of Invention
In view of the above, embodiments of the present invention are directed to provide a display panel, so as to solve the problem of abnormal display caused by heat generated by a driving chip in the display panel in the prior art.
The invention provides a display screen main body, which comprises a display side and a non-display side which are oppositely arranged; the flexible circuit board is bound and connected with the display screen main body and then arranged on the non-display side of the display screen main body in a bending mode; and the first heat dissipation piece is clamped between the display screen main body and the flexible circuit board. Through set up first radiating part between display screen main part and flexible circuit board, can distribute away the heat that the flexible circuit board during operation produced as fast as possible to reduced the influence of heat to the display effect of display screen main part, realized the stable of display screen and sent out, promoted the reliability of display screen.
In one embodiment, the first heat dissipation element is a heat sink, and an orthographic projection of the flexible circuit board on the first heat dissipation element covers a part of the first heat dissipation element. Therefore, heat generated by the flexible circuit board can be transferred to the first heat dissipation part with a larger area, so that the heat dissipation area is increased, and the heat dissipation rate is improved.
In one embodiment, a second heat dissipation member is also included, the second heat dissipation member contacting and surrounding the flexible circuit board and the peripheral sidewall of the first heat dissipation member. The second heat dissipation part is arranged around the first heat dissipation part and the flexible circuit board, so that the heat dissipation area can be further increased, and the heat dissipation rate is improved.
In one embodiment, the thickness of the second heat dissipation member is equal to the sum of the thickness of the flexible circuit board and the thickness of the first heat dissipation member in a direction from the display side to the non-display side. Like this, the second radiating piece can also play the effect of bed hedgehopping when having the radiating effect to compensate these two thickness around flexible circuit board and first fin, thereby form the flat surface come with the apron butt of assemblage frame or bond fixedly, promoted display screen overall structure's stability.
In one embodiment, the first heat dissipation element and the second heat dissipation element are different materials. Therefore, materials of the first radiating piece and the second radiating piece can be reasonably selected according to specific conditions, and the application range of the display screen is widened.
In one embodiment, the material of the second heat dissipation element comprises foam. Because the bubble is cotton light, through regard as the second radiating piece with the bubble cotton, can reduce the influence of second radiating piece to the whole weight of display screen.
In one embodiment, the assembly further comprises an assembly frame and a buffer piece; the assembling frame comprises a bottom plate and a buffer piece, the bottom plate is located on one side, far away from the display screen main body, of the flexible circuit board, and the buffer piece is clamped between the bottom plate and the flexible circuit board. Through setting up the bolster, can release the inside or external stress of display screen, play the effect of protection display screen main part, promote the display screen reliability.
In one embodiment, the first heat dissipation element is a heat dissipation plate, and the heat dissipation plate has a hollow structure. The radiating fins are of hollow structures, so that radiating channels can be formed in the radiating fins, and the radiating effect of the first radiating fins is further improved.
In one embodiment, the first heat dissipation element is a heat sink having a thickness of 20-100 microns. Therefore, the thickness of the radiating fins can be reduced as much as possible while the radiating effect is met, and the influence on the whole thickness of the display screen is reduced.
In one embodiment, the first heat dissipation element comprises any one of a graphite sheet, a graphene sheet, a copper foil, a composite thermally conductive sheet of graphite and copper.
According to the display screen provided by the invention, the first heat dissipation part is arranged between the display screen main body and the flexible circuit board, so that heat generated by the flexible circuit board during working can be dissipated as quickly as possible, the influence of the heat on the display effect of the display screen main body is reduced, and the stable luminescence of the display screen is realized.
Drawings
Fig. 1 is a schematic side view of a display screen according to a first embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of the display screen of FIG. 1 taken along line A1-A2.
Fig. 3 is a schematic cross-sectional structure diagram of a display screen according to a second embodiment of the present invention.
Fig. 4 is a schematic cross-sectional structure diagram of a display screen according to a third embodiment of the present invention.
Fig. 5 is a schematic cross-sectional structure diagram of a display screen according to a fourth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic side view of a display screen according to a first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the display screen of FIG. 1 taken along line A1-A2. As shown in fig. 1 and 2 in conjunction, the display screen 10 includes a display screen main body 11, a flexible circuit board 12, and a first heat sink 13. The display screen main body 11 includes a display side a and a non-display side B which are oppositely disposed in the first direction L. The flexible circuit board 12 is disposed on the non-display side B of the display screen main body 11 in a bending manner after being bound and connected with the display screen main body 11. The first heat sink 13 is interposed between the display screen main body 11 and the flexible circuit board 12.
The display main body 11 is a display panel having a display function. The display side a is a side of the display main body 11 on which a screen can be displayed, and the non-display side B is a side opposite to the display side a. The first direction L is, for example, a longitudinal direction shown in fig. 1, the display side a is vertically upward in the longitudinal direction, and the non-display side B is vertically downward in the longitudinal direction. Taking an Organic Light Emitting Diode (OLED) display panel as an example, the display panel main body 11 includes an OLED array layer and a Thin Film Transistor (TFT) array layer which are stacked. It should be understood that the display screen body 11 herein may also be a hard screen.
The display screen main part 11 is provided with the pad subregion including the display area that is located central authorities and the frame district that is located the display area periphery, frame district, and flexible circuit board 12 passes through the pad subregion and is connected with display screen main part 11 binding. Because the flexible circuit board 12 has flexibility, after the flexible circuit board 12 is bound and connected with the display screen main body 11, the flexible circuit board 12 is bent to the non-display side B of the display screen main body 11, so that the area occupied by the flexible circuit board 12 on the display side a can be reduced, and a narrow frame is realized.
According to the display screen that this embodiment provided, through set up first radiating piece 13 between display screen main part 11 and flexible circuit board 12, can distribute away the heat that flexible circuit board 12 during operation produced as fast as possible to reduced the influence of heat to the display effect of display screen main part 11, realized that stable narrow frame screen body is luminous, promoted the reliability of display screen 10.
In one embodiment, the display screen body 11 is a flexible display panel. In this case, the display panel body 11 includes a display area at the center and a frame area at the periphery, and the frame area is provided with a routing layout of the driving circuit. Because the frame area has flexibility, after the display screen main body 11 is bound and connected with the flexible circuit board 12 through the frame area, the flexible circuit board 12 is bent to the non-display side B of the display screen main body 11 through bending the frame area, so that a full screen can be realized.
In one embodiment, the flexible circuit board 12 includes a driving chip and a connection bus, and the driving chip is electrically connected to the display screen main body 11 through the connection bus. The driving chip is used for receiving an external image signal and converting the image signal into a control signal to be output to the display screen main body 11 through the connecting flat cable, so that the display screen main body 11 is driven to display images.
In one embodiment, the first heat dissipation member 13 is adhesively fixed to the display screen main body 11 and the flexible circuit board 12, respectively. Through bonding first heat dissipation member 13 with display screen main part 11 and flexible circuit board 12 fixedly, be equivalent to first heat dissipation member 13 and display screen main part 11 and flexible circuit board 12 direct contact, be favorable to heat transfer, improved radiating rate.
In one embodiment, the first heat dissipation element 13 includes any one of a graphite sheet, a graphene sheet, a copper foil, a composite heat conductive sheet of graphite and copper. The graphene is a brand-new heat conduction and dissipation material, has unique crystal grain orientation, conducts heat uniformly along two directions, and can be well adapted to any surface by a lamellar structure, so that the performance of consumer electronic products is improved while a heat source and components are shielded. The product can provide heat insulation in the aspect of thickness while uniformly radiating, the heat resistance of the product is lower than that of aluminum by 40 percent, lower than that of copper by 20 percent, lighter than aluminum by 25 percent and lighter than copper by 75 percent, and the heat radiating structure can be optimized to a great extent. The surface of the graphene material can be directly combined with various materials such as adhesive sticker and the like, so that the graphene material is convenient to assemble with materials such as metal and the like. The material has high strength and high elasticity, can be smoothly attached to any plane and curved surface on the premise of not needing deformation processing, can effectively protect the flexible circuit board, and avoids other hard objects from scratching the flexible circuit board 12 in the assembly process. In addition, in the using process, the graphene is not easy to deteriorate due to the influence of the surrounding environment, and is not easy to pollute electrical components, so that the graphene is very environment-friendly.
In one embodiment, the first heat dissipation element 13 is a heat sink having a thickness of 20-100 microns. This can reduce the thickness of the heat sink as much as possible while satisfying the heat dissipation effect, thereby reducing the influence on the overall thickness of the display screen 10.
In one embodiment, the first heat dissipation element 13 is a heat dissipation plate, and the heat dissipation plate has a hollow structure. The hollow structure mentioned herein includes a regular or irregular hollow structure. In one embodiment, the "regular or irregular hollow structure" is for a cross section of the hollowed-out structure, and the "regular hollow structure" refers to the hollowed-out structure with the same cross section everywhere; otherwise, the structure is an irregular hollow structure. In another embodiment, the "regular or irregular hollow structure" refers to the hollow structure whose arrangement can be regularly followed, such as through holes arranged in an array, with respect to the arrangement of the whole hollow structure; otherwise, the structure is an irregular hollow structure. By configuring the heat dissipation fins as hollow structures, heat dissipation channels can be formed in the heat dissipation fins, thereby further improving the heat dissipation effect of the first heat dissipation fins 13. Meanwhile, the hollow structure has good elasticity, stress inside or outside the display screen 10 can be buffered, and the reliability of the display screen 10 is improved.
In one embodiment, the hollow structure of the heat sink is implemented as a plurality of through holes arranged in a concentric circle manner, the through holes located in the inner ring are arranged closely, and the through holes located in the outer ring are arranged sparsely. Because the heat at the edge of the flexible circuit board is easier to dissipate than the heat at the central area, the heat dissipation rate at each position of the flexible circuit board can be balanced by arranging more through holes at the inner ring. Furthermore, a communication hole can be arranged between the inner ring through hole and the outer ring through hole, so that the heat in the center of the flexible circuit board can be guided out to the edge area as soon as possible, and the heat dissipation rate is further improved.
In this case, in one embodiment, the hollow structure of the first heat dissipation element 13 is filled with a buffer material to further release the internal stress of the display screen. The cushioning material is, for example, a rubber material, foam, or the like.
In one embodiment, the first heat dissipating element 13 is a heat dissipating fin, the surface of the heat dissipating fin contacting the flexible circuit board 12 is provided with a plurality of strip-shaped convex ridges, a plurality of parallel air channels are formed between adjacent strip-shaped convex ridges, and the plurality of parallel air channels form openings at the edge of the heat dissipating fin. Because the heated air molecules move towards the upper part, the formed air flow also moves towards the upper part, and the air duct can play a role in guiding the upward air flow, so that the air flowing through the radiating fins is consistent in flow direction and not disordered, the heat exchange between the air flow and the radiating fins is fully and efficiently facilitated, and the radiating efficiency is further improved.
In one embodiment, the first heat dissipation element 13 is a heat sink, and four corners of the heat sink are rounded corners of an arc. In this way, the corners of the heat sink may be prevented from scratching the flexible circuit board 12.
Fig. 3 is a schematic cross-sectional structure diagram of a display screen according to a second embodiment of the present invention. As shown in fig. 3, the display panel 20 is different from the display panels shown in fig. 1 and 2 only in that a second heat dissipation member 15 is further included in the display panel 20, and the second heat dissipation member 15 contacts and surrounds the peripheral side walls of the flexible circuit board 12 and the first heat dissipation member 13.
The materials of the second heat dissipation element 15 and the first heat dissipation element 13 are the same or different. In one embodiment, the second heat dissipation element 15 and the first heat dissipation element 13 are of different materials. For example, the second heat dissipation member 15 is foam, and the first heat dissipation member 13 is copper foil. By providing the second heat dissipation member 15, the heat dissipation effect of the heat generated from the flexible circuit board 12 can be further improved.
In one embodiment, as shown in FIG. 3, the display screen 20 further includes an assembly frame including a base plate 14 and side frames surrounding the peripheral edges of the base plate 14 to form fenestrations on opposite sides of the base plate 14. The assembly frame covers the entirety of the display screen main body 11, the flexible circuit board 12, the first heat dissipation member 12, and the second heat dissipation member 15, and exposes the display surface of the display screen main body 11 at the windowing position. In this case, the first heat dissipating member 13, the flexible circuit board 12, and the second heat dissipating member 15 are interposed between the display screen main body 11 and the bottom plate 14 of the assembly frame, so that the flexible screen main body 11, the first heat dissipating member 13, the flexible circuit board 12, the second heat dissipating member 15, and the bottom plate 14 form an integral body. In this case, adjacent two of the flexible screen main body 11, the first heat dissipation member 13, the flexible circuit board 12, the second heat dissipation member 15, and the bottom plate 14 may be fixed by good matching and fitting, without adding an adhesive layer, thereby simplifying the manufacturing process.
In one embodiment, the thickness of the second heat dissipation member 15 is equal to the sum of the thickness of the flexible circuit board 12 and the thickness of the first heat dissipation member 13 in the first direction L, i.e., the direction pointing from the display side to the non-display side of the display screen main body. In this way, the second heat dissipating member 15 can also function as an elevation in addition to the heat dissipating function to compensate for the thickness of the flexible circuit board 12 and the first heat dissipating fin 13 around the both, thereby forming a flat surface to abut against or be adhesively fixed to the bottom plate 14.
Fig. 4 is a schematic cross-sectional structure diagram of a display screen according to a third embodiment of the present invention. As shown in fig. 4, the display screen 30 is different from the display screen 20 shown in fig. 2 only in that an orthographic projection of the flexible circuit board 12 on the first heat dissipation member 13 covers a part of the first heat dissipation member 13. The first heat dissipation member 13 shown in fig. 4, for example, is a heat sink, and the area of the surface of the heat sink close to the flexible circuit board 12 is larger than the area of the surface of the flexible circuit board close to the heat sink. Therefore, heat generated by the flexible circuit board can be transferred to the first heat dissipation part with a larger area, so that the heat dissipation area is increased, and the heat dissipation rate is improved.
In the present embodiment, the first heat sink 13 is a heat sink, and the first heat sink 13 covers the non-display surface of the display panel main body 11. In this way, the first heat dissipation element 13 can perform a heat dissipation function on the one hand and can also perform a supporting function on the other hand.
In one embodiment, the first heat dissipation element 13 is a heat sink, which includes an openwork structure. The hollow structure can be arranged at any position of the heat sink 13, for example, the hollow structure is arranged in the region of the heat sink facing the flexible circuit board 12; or the whole radiating fin is provided with a hollow structure. By providing the hollowed-out structure on the heat sink, a heat dissipation channel can be formed in the heat sink, thereby further improving the heat dissipation effect of the first heat sink 13.
Further, in one embodiment, the hollow structure of the first heat dissipation element 13 is filled with a buffer material for releasing the internal stress of the display screen. In another embodiment, the first heat dissipation element 13 is filled with a heat conductive material in the hollow structure, so as to quickly conduct the heat generated by the flexible circuit board 12 out from the peripheral edges of the heat dissipation plate, thereby further improving the heat dissipation effect. The thermally conductive material is for example aluminium.
Fig. 5 is a schematic cross-sectional structure diagram of a display screen according to a fourth embodiment of the present invention. As shown in fig. 5, the display screen 40 differs from the display screen 30 shown in fig. 4 only in that a buffer 16 is further included in the display screen 40. The lower plate 14 of the assembly frame is located on the side of the flexible circuit board 12 far away from the display screen main body 11, and the buffer 16 is sandwiched between the lower plate 14 and the flexible circuit board 12.
In one embodiment, the material of the buffer 16 and the material of the second heat dissipation element 15 are the same, for example, the material of both the buffer 16 and the second heat dissipation element 15 is foam. In this case, the whole of the buffer member 16 and the second heat dissipating member 15 may be implemented as a cubic foam, and a groove for accommodating the flexible display 12 is formed in the cubic foam, and the groove is provided with an opening at an edge of the cubic foam in order to be adapted to the bent portion of the edge region of the flexible display 12.
Thus, the buffer 16 may be integrally formed with the second heat sink 15, simplifying the manufacturing process. At the same time, the buffer 16 can release internal or external stress, thereby providing protection for the display screen body 11.
In one embodiment, the material of the cushion 16 is a thermoplastic polyolefin elastomer (TPO). The TPO material has the functions of buffering and energy dissipation, and also has the superior performances of no toxicity, no harm, no pollution, heat resistance, aging resistance and the like.
In one embodiment, the first heat dissipation member 13, the second heat dissipation member 15, and the buffer member 16 are each a sheet-like structure, the areas of the surfaces of the first heat dissipation member 13 and the buffer member 16 perpendicular to the first direction are equal to the area of the non-display surface B of the flexible screen body 11, and the sum of the areas of the surfaces of the second heat dissipation member 15 and the flexible circuit board 12 perpendicular to the first direction is equal to the area of the non-display surface B of the flexible screen body 11. Thus, there is no hollow area between the assembly frame and the display main body 11, and the stability of the entire structure of the display is maximally achieved.
According to the display screen provided by the embodiment, the stress inside or outside the display screen can be released by arranging the buffer piece 16, so that the protection is provided for the display screen body 11, and the reliability of the display screen is improved.
The invention further provides electronic equipment comprising the display screen provided by any one of the embodiments. The electronic device has the technical effect corresponding to the display screen, and the description is omitted here.
It should be understood that the terms "first" and "second" used in the description of the embodiments of the present invention are only used for clearly illustrating the technical solutions, and are not used for limiting the protection scope of the present invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (10)
1. A display screen, comprising:
the display screen comprises a display screen main body and a display screen display main body, wherein the display screen main body comprises a display side and a non-display side which are oppositely arranged;
the flexible circuit board is bound and connected with the display screen main body and then arranged on the non-display side of the display screen main body in a bending mode; and
and the first heat dissipation piece is clamped between the display screen main body and the flexible circuit board.
2. A display screen as recited in claim 1, further comprising a second heat dissipation member contacting and surrounding the flexible circuit board and a peripheral sidewall of the first heat dissipation member.
3. A display screen as recited in claim 2, wherein the thickness of the second heat dissipation element is equal to the sum of the thickness of the flexible circuit board and the thickness of the first heat dissipation element in a direction from the display side to the non-display side.
4. A display screen as recited in claim 2 or 3, wherein the first and second heat dissipation elements are of different materials.
5. A display screen as recited in claim 2 or claim 3, wherein the material of the second heat dissipation element comprises foam.
6. A display screen in accordance with any one of claims 1-3, wherein the first heat dissipation member is a heat sink, and an orthographic projection of the flexible circuit board on the first heat dissipation member covers a portion of the first heat dissipation member.
7. A display screen according to any one of claims 1 to 3, wherein the first heat dissipation member is a heat dissipation fin, and the heat dissipation fin has a hollow structure.
8. A display screen in accordance with any one of claims 1 to 3, wherein the first heat dissipation element is a heat sink, the heat sink having a thickness of 20 to 100 microns.
9. A display screen in accordance with any one of claims 1-3, wherein the first heat sink comprises any one of a graphite sheet, a graphene sheet, a copper foil, a composite thermally conductive sheet of graphite and copper.
10. The display screen of claim 1, further comprising an assembly frame and a buffer; the assembly frame comprises a bottom plate, the bottom plate is located on one side, far away from the display screen main body, of the flexible circuit board, and the buffer piece is clamped between the bottom plate and the flexible circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010162224.8A CN111182775A (en) | 2020-03-10 | 2020-03-10 | Display screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010162224.8A CN111182775A (en) | 2020-03-10 | 2020-03-10 | Display screen |
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| CN111182775A true CN111182775A (en) | 2020-05-19 |
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Cited By (2)
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| CN113178137A (en) * | 2021-04-07 | 2021-07-27 | Tcl华星光电技术有限公司 | Drive substrate and display panel |
| CN113923278A (en) * | 2020-07-08 | 2022-01-11 | 深圳市柔宇科技股份有限公司 | Bendable device |
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Application publication date: 20200519 |