Liquid crystal display screen capable of preventing lower polaroid from being scalded during binding of driving IC (integrated circuit)

Abstract

The utility model discloses a liquid crystal display screen capable of preventing a lower polaroid from being scalded during binding of a driving IC (integrated circuit), which comprises the lower polaroid, a lower substrate, an upper substrate, an upper polaroid and a cover plate which are sequentially stacked from bottom to top, and the lower substrate is longer than the upper substrate and extends outwards to form a step. A driving IC and an FPC are bound on the upper surface of the lower substrate at the step, the lower polaroid is provided with a clearance part, and the position and the boundary dimension of the clearance part correspond to the position and the boundary dimension of the driving IC. The lower polaroid is not scalded when the driving IC is bound, and other positions of the lower polaroid do not retract inwards, so that the shading glue has a larger pasting area, and the problem that backlight and a liquid crystal display screen are separated after a terminal client complete machine is subjected to an oscillation or drop test is avoided. In addition, the lower polaroids are adhered to other positions of the lower substrate except the hollow part, so that the deformation space is reduced, and corners of the lower substrate can be prevented from being broken in a drop test.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to a liquid crystal display screen which can prevent a lower polarizer from being burned when a driver IC is bound. Background Art

[0002] In order to prevent the high temperature generated when binding the driver IC from scalding the lower polarizer and affecting the display effect, the lower polarizer in the structure of the traditional LCD screen needs to be retracted a certain distance, that is, a certain distance is left from the driver IC. With the popularization of full-screen displays, the borders on all sides of the product are getting narrower and narrower, resulting in a smaller and smaller pasting area for the light-shielding glue on the backlight module and the lower polarizer of the retracted LCD screen. After the end customer's whole machine is subjected to a shock or drop test, the backlight and LCD screen are prone to separation. In addition, the area where the lower polarizer is not attached is a single layer of glass, and there is also a certain distance from the light-shielding glue on the backlight module. There is a certain deformation space, and the corners of the lower substrate are prone to cracking in the drop test. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to avoid burning the lower polarizer when the driver IC is bound, increase the pasting area between the lower polarizer and the light-shielding adhesive, and increase the pasting area between the lower polarizer and the single-layer area to avoid cracking of the corners of the lower substrate.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] In order to solve the above technical problems, the utility model provides a liquid crystal display screen which can prevent the lower polarizer from being burned when the driver IC is bound. The liquid crystal display screen comprises a lower polarizer, a lower substrate, an upper substrate, an upper polarizer and a cover plate which are stacked in sequence from bottom to top. The lower substrate is longer than the upper substrate and extends outward to form a step. The upper surface of the lower substrate located at the step is bound with a driver IC and an FPC. The lower polarizer is provided with a space avoidance portion, and the position and outer dimensions of the space avoidance portion correspond to the position and outer dimensions of the driver IC.

[0006] As a preferred implementation of the liquid crystal display screen provided by the utility model for preventing the driver IC from scalding the lower polarizer when binding, the single-side outer dimension of the air-avoiding portion is 1mm-2mm larger than the single-side outer dimension of the driver IC.

[0007] As a preferred embodiment of the liquid crystal display screen provided by the utility model for preventing the driver IC from burning the lower polarizer during binding, the FPC includes a substrate layer, a circuit layer arranged on the upper surface of the substrate layer, and a metal heat dissipation layer arranged on the lower surface of the substrate layer.

[0008] As a preferred embodiment of the liquid crystal display screen provided by the utility model for preventing the driver IC from burning the lower polarizer when binding, the FPC also includes at least one through-hole penetrating the substrate layer, the circuit layer and the metal heat dissipation layer, and the inner wall of the through-hole is provided with a thermal conductive layer in contact with the circuit layer and the metal heat dissipation layer.

[0009] As a preferred implementation of the liquid crystal display screen for preventing the driver IC from scalding the lower polarizer during binding provided by the utility model, a heat conductor connected to an external heat conductive structure is arranged in the through hole, and the heat conductor is in contact with the heat conductive layer.

[0010] As a preferred implementation of the liquid crystal display screen for preventing the driver IC from scalding the lower polarizer during binding provided by the utility model, the structure of the metal heat dissipation layer is a mesh structure, a strip structure, a wavy structure or a honeycomb structure.

[0011] As a preferred embodiment of the liquid crystal display screen provided by the utility model for preventing the driver IC from burning the lower polarizer during binding, a plurality of grooves are formed on the upper surface of the cover plate by etching, and a plastic layer is covered on the upper side of the cover plate, and the plastic layer is embedded in the plurality of grooves.

[0012] As a preferred implementation of the liquid crystal display screen for preventing the lower polarizer from being burned when the driver IC is bound provided by the utility model, the shape of the groove is square or circular.

[0013] As a preferred implementation of the liquid crystal display screen provided by the utility model for preventing the driver IC from scalding the lower polarizer when binding, the groove is a closing groove that is narrow on the outside and wide on the inside.

[0014] As a preferred implementation of the liquid crystal display screen for preventing the lower polarizer from being burned when the driver IC is bound provided by the utility model, the cross-sectional shape of the groove is an isosceles trapezoid.

[0015] The utility model has the following beneficial effects:

[0016] Since the lower polarizer is provided with a void-proof portion, and the position and dimensions of the void-proof portion correspond to those of the driver IC, the lower polarizer will not be burned when binding the driver IC, and the other positions of the lower polarizer will not shrink inward, so that the light-shielding adhesive has more pasting area, avoiding the problem of separation of the backlight and the LCD screen after the end customer performs a shock or drop test on the whole machine. In addition, except for the hollowed-out portion, the lower polarizer is pasted on other positions of the lower substrate, which reduces the deformation space, and the drop test can avoid the cracking of the corners of the lower substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 The utility model provides a structural schematic diagram of a liquid crystal display screen which prevents a lower polarizer from being burned when a driver IC is bound.

[0019] Figure 2 for Figure 1 Bottom view of .

[0020] Figure 3 This is a schematic diagram of the structure of Example 2.

[0021] Figure 4 This is a schematic diagram of the structure of Example 3.

[0022] Figure 5 for Figure 4 Schematic diagram of the decomposition structure.

[0023] Figure 6 for Figure 4 Schematic diagram of the improved structure.

[0024] Description of Figure Numbers:

[0025] Lower polarizer 1; lower substrate 2; upper substrate 3; upper polarizer 4; cover plate 5; driver IC 6; FPC 7; air-proof portion 11;

[0026] Base material layer 71; circuit layer 72; metal heat dissipation layer 73; through hole 74;

[0027] Plastic layer 8; groove 51. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] The utility model provides a liquid crystal display screen which can prevent a lower polarizer from being burned when a driver IC is bound. The liquid crystal display screen comprises a lower polarizer, a lower substrate, an upper substrate, an upper polarizer and a cover plate which are sequentially stacked from bottom to top, wherein the lower substrate is longer than the upper substrate and extends outward to form a step, a driver IC and an FPC are bound to the upper surface of the lower substrate located at the step, the lower polarizer is provided with a space avoidance portion, and the position and the outer dimensions of the space avoidance portion correspond to the position and the outer dimensions of the driver IC.

[0032] Since the lower polarizer is provided with a void-proof portion, and the position and dimensions of the void-proof portion correspond to those of the driver IC, the lower polarizer will not be burned when binding the driver IC, and the other positions of the lower polarizer will not shrink inward, so that the light-shielding adhesive has more pasting area, avoiding the problem of separation of the backlight and the LCD screen after the end customer performs a shock or drop test on the whole machine. In addition, except for the hollowed-out portion, the lower polarizer is pasted on other positions of the lower substrate, which reduces the deformation space, and the drop test can avoid the cracking of the corners of the lower substrate.

[0033] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.

[0034] Example 1

[0035] See also Figure 1 and Figure 2 , a liquid crystal display screen provided by the utility model to prevent the lower polarizer 1 from being burned when the driver IC6 is bound, comprises a lower polarizer 1, a lower substrate 2, an upper substrate 3, an upper polarizer 4 and a cover plate 5 which are sequentially stacked from bottom to top, the lower substrate 2 is longer than the upper substrate 3 and extends outward to form a step, the upper surface of the lower substrate 2 located at the step is bound with the driver IC6 and FPC7, the lower polarizer 1 is provided with a space-avoiding portion 11, and the position and the outer dimensions of the space-avoiding portion 11 correspond to the position and the outer dimensions of the driver IC6. Since the lower polarizer 1 is provided with the space-avoiding portion 11, and the position and the outer dimensions of the space-avoiding portion 11 correspond to the position and the outer dimensions of the driver IC6, the lower polarizer 1 will not be burned when the driver IC6 is bound, and the other positions of the lower polarizer 1 will not shrink, so that the light-shielding adhesive has more pasting area, avoiding the problem of separation of the backlight and the liquid crystal display screen after the terminal customer performs a vibration or drop test on the whole machine. In addition, the lower polarizer 1 is pasted on other positions of the lower substrate 2 except the hollowed-out portion, which reduces the deformation space, and the drop test can avoid the cracking of the corners of the lower substrate 2.

[0036] Furthermore, the outer dimension of one side of the air-avoiding portion 11 is larger than the outer dimension of one side of the driving IC 6 by 1 mm to 2 mm.

[0037] Furthermore, one end of the avoiding portion 11 close to the edge extends to the edge of the lower substrate 2 .

[0038] Example 2

[0039] See also Figure 3 As a further optimization scheme of Example 1, in this embodiment, the FPC7 includes a substrate layer 71, a circuit layer 72 arranged on the upper surface of the substrate layer 71, and a metal heat dissipation layer 73 arranged on the lower surface of the substrate layer 71. The arrangement method can be that the circuit layer 72 and the metal heat dissipation layer 73 are respectively attached to the substrate layer 71 by double-sided adhesive. Since the thickness of the substrate layer 71 is relatively thin, the heat on the FPC7 can be diffused to the metal heat dissipation layer 73 through the substrate layer 71. The metal heat dissipation layer 73 can effectively increase the heat dissipation area of ​​the FPC7 and play a role in uniform heat dissipation, thereby improving the heat dissipation efficiency of the FPC7. The substrate layer 71 can be any one of polyimide, polyester, polysulfone or polytetrafluoroethylene, the double-sided adhesive is any one of an acrylic adhesive layer or an epoxy resin adhesive layer, and the metal heat dissipation layer 73 can be a copper foil layer.

[0040] Furthermore, the FPC 7 further includes at least one through-hole 74 penetrating the substrate layer 71, the circuit layer 72 and the metal heat dissipation layer 73, and the inner wall of the through-hole 74 is provided with a heat-conducting layer in contact with the circuit layer 72 and the metal heat dissipation layer 73. By utilizing the good thermal conductivity of the through-hole 74, the circuit layer 72 and the metal heat dissipation layer 73 on both sides of the substrate layer 71 can be electrically connected, and a good thermal conductivity function can be exerted, and the thermal conductive layer can provide a thermal conductive function to achieve a good heat dissipation effect. Among them, the thermal conductive layer can be a copper glue conductive ink layer.

[0041] Furthermore, a heat conductor connected to an external heat-conducting structure is disposed in the through hole 74, and the heat conductor is connected to the external heat-conducting structure from one side of the circuit layer 72, and is also in contact with the heat-conducting layer in the through hole 74, so that the circuit layer 72 and the metal heat dissipation layer 73 can be connected to the external heat-conducting structure through the through hole 74, so that the heat in the FPC 7 is diffused to the external heat-conducting structure through the heat conductor in the through hole 74, so as to further improve the heat dissipation efficiency of the FPC 7. Preferably, in order to enable the through hole 74 to be connected to the external heat-conducting structure, the through hole 74 is disposed at the edge of the FPC 7.

[0042] Furthermore, the metal heat dissipation layer 73 is a uniform heat dissipation structure, and its structure can be any one of a mesh structure, a strip structure, a wavy structure or a honeycomb structure. Through this uniform heat dissipation structure, the heat dissipation effect can be better improved.

[0043] Example 3

[0044] See also Figures 4 to 6As a further optimization scheme of Example 1, in this embodiment, the upper surface of the cover plate 5 is covered with a plastic layer 8, and a plurality of grooves 51 are formed downward on the upper surface of the cover plate 5 by etching, and a portion of the lower surface of the plastic layer 8 is embedded in each groove 51. Since the surface of the groove 51 formed by etching has a certain degree of roughness, the plastic layer 8 can be tightly bonded to the groove 51 to prevent the cover plate 5 and the plastic layer 8 from falling off. Since the upper part of the cover plate 5 is covered with a plastic layer 8, and a plurality of grooves 51 are formed on the upper surface of the cover plate 5 by etching, and the plastic layer 8 can be embedded in the interior of the plurality of grooves 51, the grooves 51 formed by etching make the inner surface of the grooves 51 have a certain degree of roughness, and the surface of the grooves 51 with a certain degree of roughness can improve the bonding force between the grooves 51 and the plastic layer 8, thereby reducing the possibility of separation of the grooves 51 and the plastic layer 8. When the LCD screen is hit or falls, the plastic layer 8 on the upper surface of the cover plate 5 can directly withstand the external force, thereby preventing the external force from directly acting on the cover plate 5. Since the plastic layer 8 can absorb most of the energy, the remaining external force is very weak when it acts on the cover plate 5, thereby effectively reducing the risk of the cover plate 5 being broken or damaged; and when the LCD screen is subjected to external force, even if the external force is large, it will only damage the plastic layer 8 on the upper surface of the cover plate 5, and will not directly damage the cover plate 5, thereby preventing the cover plate 5 from being damaged and causing the LCD screen to be unable to be used normally, thereby bringing a better user experience to users and improving the anti-fall ability of the LCD screen.

[0045] Furthermore, the shape of the groove 51 can be square or circular, and the cross-sectional shape of the groove 51 can be a closing groove that is narrow on the outside and wide on the inside. In the present embodiment, the cross-sectional shape of the groove 51 is an isosceles trapezoid, and the groove 51 is in the shape of an elongated strip. The isosceles trapezoid-shaped groove 51 can allow the plastic layer 8 to be tightly embedded in the groove 51, thereby preventing the groove 51 from separating from the plastic layer 8, thereby preventing the cover plate 5 from falling off from the plastic layer 8. The elongated groove 51 can increase the fitting portion between the plastic layer 8 and the groove 51, thereby increasing the fitting strength between the groove 51 and the plastic layer 8.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A liquid crystal display screen that prevents the lower polarizer from being burned when the driver IC is bound, characterized in that: It includes a lower polarizer, a lower substrate, an upper substrate, an upper polarizer and a cover plate which are stacked in sequence from bottom to top. The lower substrate is longer than the upper substrate and extends outward to form a step. The upper surface of the lower substrate located at the step is bound with a driver IC and an FPC. The lower polarizer is provided with a gap, and the position and outer dimensions of the gap correspond to the position and outer dimensions of the driver IC.

2. The liquid crystal display screen for preventing the lower polarizer from being burned during driver IC binding according to claim 1, characterized in that: The outer dimension of one side of the air-avoiding portion is larger than the outer dimension of one side of the driving IC by 1 mm to 2 mm.

3. The liquid crystal display screen for preventing the lower polarizer from being burned during driver IC binding according to claim 1, characterized in that: The FPC includes a substrate layer, a circuit layer disposed on an upper surface of the substrate layer, and a metal heat dissipation layer disposed on a lower surface of the substrate layer.

4. The liquid crystal display screen for preventing the lower polarizer from being burned during driver IC binding according to claim 3, characterized in that: The FPC further includes at least one through-hole penetrating the substrate layer, the circuit layer and the metal heat dissipation layer, and an inner wall of the through-hole is provided with a heat-conducting layer in contact with the circuit layer and the metal heat dissipation layer.

5. The liquid crystal display screen for preventing the lower polarizer from being burned during driver IC binding according to claim 4, characterized in that: A heat conductor connected to an external heat-conducting structure is arranged in the through hole, and the heat conductor is in contact with the heat-conducting layer.

6. The liquid crystal display screen for preventing the lower polarizer from being burned during driver IC binding according to claim 3, characterized in that: The structure of the metal heat dissipation layer is a mesh structure, a strip structure, a wave structure or a honeycomb structure.

7. The liquid crystal display screen for preventing the lower polarizer from being burned during driver IC binding according to claim 1, characterized in that: A plurality of grooves are formed on the upper surface of the cover plate by etching, and a plastic layer is covered on the upper side of the cover plate, and the plastic layer is embedded in the plurality of grooves.

8. The liquid crystal display screen for preventing the lower polarizer from being burned during driver IC binding according to claim 7, characterized in that: The shape of the groove is square or circular.

9. The liquid crystal display screen for preventing the lower polarizer from being burned during driver IC binding according to claim 7, characterized in that: The groove is a closing groove which is narrow outside and wide inside.

10. The liquid crystal display screen for preventing the lower polarizer from being burned during driver IC binding according to claim 9, characterized in that: The cross-sectional shape of the groove is an isosceles trapezoid.

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