Liquid crystal display screen without backlight module

Abstract

The utility model discloses a liquid crystal display screen without a backlight module, which comprises a lower polaroid, a lower substrate, an upper substrate, an upper polaroid and a cover plate which are sequentially overlapped from bottom to top, the upper polaroid and the cover plate are attached through optical cement, the lower polaroid is a total reflection lower polaroid, and the lower substrate is a total reflection lower polaroid. The lower substrate is longer than the upper substrate and extends outwards to form a step, a driving IC and a driving FPC are bound on the upper surface of the lower substrate located at the step, an LED lamp and an LED FPC are fixed on the side edge of the upper substrate far away from the step, a plurality of grooves are formed in the upper surface of the cover plate through etching, and the LED lamp is arranged in the grooves. The upper portion of the cover plate is covered with a plastic layer, and the plastic layer is embedded into the multiple grooves. When the brightness is sufficient in the daytime, light can be totally reflected through the total reflection lower polaroid to achieve normal display, and when the brightness is low at night, the LED lamp on the side edge of the upper substrate can be turned on due to the fact that no light exists, and therefore normal display is achieved.

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 without a backlight module. Background Art

[0002] Traditional LCD screens usually include a backlight module and a TFT module installed on the backlight module. The backlight module transmits the light generated by the LED lamp to the optical film group through the light guide plate, and then passes through the TFT module to reach the user's eyes. However, the backlight module in the traditional solution has many components, which leads to increased manufacturing costs of the product and a large number of defective products, reducing the competitiveness of the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to design a liquid crystal display screen that does not require a backlight module, so as to reduce parts, reduce the manufacturing cost of the product, reduce the probability of defective products, and improve the competitiveness of the product.

[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 that does not require a backlight module, comprising a lower polarizer, a lower substrate, an upper substrate, an upper polarizer and a cover plate that are stacked in sequence from bottom to top, the upper polarizer and the cover plate are bonded together by optical glue, the lower polarizer is a total reflection lower polarizer, 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 a driver FPC, the side of the upper substrate away from the step is fixed with an LED lamp and an LED FPC, the upper surface of the cover plate is formed with a plurality of grooves by etching, the upper surface of the cover plate is covered with a plastic layer, and the plastic layer is embedded in the plurality of grooves.

[0006] As a preferred implementation of the liquid crystal display screen that does not require a backlight module provided by the utility model, a touch glass is further arranged between the cover plate and the upper polarizer, the LED lamp and the LED FPC are arranged on the side of the touch glass, and a touch FPC is fixed on the side of the touch glass away from the LED lamp.

[0007] As a preferred implementation of the liquid crystal display screen without a backlight module provided by the utility model, the shape of the groove is square or circular.

[0008] As a preferred implementation of the liquid crystal display screen without a backlight module provided by the utility model, the groove is a closing groove which is narrow outside and wide inside.

[0009] As a preferred implementation of the liquid crystal display screen without a backlight module provided by the utility model, the cross-sectional shape of the groove is an isosceles trapezoid.

[0010] As a preferred implementation of the liquid crystal display screen without a backlight module provided by the utility model, the groove is in the shape of a long strip.

[0011] As a preferred implementation of the liquid crystal display screen without a backlight module provided by the utility model, the LED 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.

[0012] As a preferred embodiment of the liquid crystal display screen without a backlight module provided by the utility model, the LED 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.

[0013] As a preferred implementation of the liquid crystal display screen without a backlight module provided by the utility model, 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.

[0014] As a preferred implementation of the liquid crystal display screen without a backlight module 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.

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

[0016] Since the lower polarizer is a total reflection lower polarizer, and LED lights and LED FPCs are fixed on the sides of the upper substrate, when the brightness is sufficient during the day, the light can be fully reflected by the total reflection lower polarizer to achieve normal display. When the brightness is dim at night, due to the absence of light, the LED lights on the sides of the upper substrate can be lit to achieve normal display. It does not require a backlight module, so as to achieve the purpose of reducing parts, reducing product manufacturing costs, reducing the probability of defective products, and improving product competitiveness. 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 1The utility model provides a structural schematic diagram of a liquid crystal display screen that does not require a backlight module.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the middle cover.

[0020] Figure 3 for Figure 2 Schematic diagram of the decomposition structure.

[0021] Figure 4 for Figure 2 Schematic diagram of the improved structure.

[0022] Figure 5 for Figure 1 Schematic diagram of the improved structure.

[0023] Figure 6 This is a schematic diagram of the structure of Example 2.

[0024] Description of Figure Numbers:

[0025] Lower polarizer 1; lower substrate 2; upper substrate 3; upper polarizer 4; cover plate 5; optical adhesive 6; LED lamp 7; LED FPC 8; groove 51; plastic layer 9;

[0026] Touch glass 10;

[0027] Base material layer 81; circuit layer 82; metal heat dissipation layer 83; through hole 84. 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 without a backlight module, which 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, the upper polarizer and the cover plate are bonded by optical adhesive, the lower polarizer is a total reflection lower polarizer, the lower substrate is longer than the upper substrate and extends outward to form a step, a driving IC and a driving FPC are bound to the upper surface of the lower substrate located at the step, an LED lamp and an LED FPC are fixed to the side of the upper substrate away from the step, a plurality of grooves are formed on the upper surface of the cover plate by etching, the upper part of the cover plate is covered with a plastic layer, and the plastic layer is embedded in the plurality of the grooves.

[0032] Since the lower polarizer is a total reflection lower polarizer, and LED lights and LED FPCs are fixed on the sides of the upper substrate, when the brightness is sufficient during the day, the light can be fully reflected by the total reflection lower polarizer to achieve normal display. When the brightness is dim at night, due to the absence of light, the LED lights on the sides of the upper substrate can be lit to achieve normal display. It does not require a backlight module, so as to achieve the purpose of reducing parts, reducing product manufacturing costs, reducing the probability of defective products, and improving product competitiveness.

[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 Figures 1 to 4, a liquid crystal display screen without a backlight module provided by the utility model, comprising 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 upper polarizer 4 and the cover plate 5 are bonded by optical glue 6, the lower polarizer 1 is a total reflection lower polarizer 1, the lower substrate 2 is longer than the upper substrate 3 and extends outward to form a step, a driver IC and a driver FPC are bound to the upper surface of the lower substrate 2 located at the step, an LED lamp 7 and an LED FPC 8 are fixed to the side of the upper substrate 3 away from the step, a plurality of grooves 51 are formed on the upper surface of the cover plate 5 by etching, a plastic layer 9 is covered on the upper side of the cover plate 5, and the plastic layer 9 is embedded in the plurality of grooves 51. Since the lower polarizer 1 is a total reflection lower polarizer 1, and the LED lamp 7 and the LED FPC 8 are fixed to the side of the upper substrate 3, when the brightness is sufficient during the day, the light can be totally reflected by the total reflection lower polarizer 1 to achieve normal display. When the brightness is dim at night, due to the absence of light, the LED lamp 7 on the side of the upper substrate 3 can be lit to achieve normal display. It does not require a backlight module, so as to achieve the purpose of reducing parts, reducing the manufacturing cost of the product, reducing the probability of defective products, and improving the competitiveness of the product.

[0036] Since the upper surface of the cover plate 5 is covered with a plastic layer 9, a plurality of grooves 51 are formed downwardly on the upper surface of the cover plate 5 by etching, and a portion of the lower surface of the plastic layer 9 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 9 can be tightly bonded to the groove 51 to prevent the cover plate 5 and the plastic layer 9 from falling off. Since the upper surface of the cover plate 5 is covered with a plastic layer 9, and a plurality of grooves 51 are formed on the upper surface of the cover plate 5 by etching, and the plastic layer 9 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 9, thereby reducing the possibility of separation of the grooves 51 and the plastic layer 9. When the LCD screen is hit or falls, the plastic layer 9 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 9 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 9 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 the user and improving the anti-fall ability of the LCD screen.

[0037] See also Figure 5, further, a touch glass 10 is arranged between the cover plate 5 and the upper polarizer 4, the LED lamp 7 and the LED FPC 8 are arranged on the side of the touch glass 10, and a touch FPC is fixed on the side of the touch glass 10 away from the LED lamp 7, which guides light through the LED lamp 7 on the side of the touch glass 10, and the touch glass 10 and the cover plate 5 are bonded by optical glue 6, and the touch glass 10 and the upper polarizer 4 are also bonded by optical glue 6. In other embodiments, LED lamps 7 can also be arranged on the sides of the touch glass 10 and the upper substrate 3 at the same time. There are multiple LED lamps 7, which are arranged in a row on the sides of the touch glass 10 and / or the upper substrate 3.

[0038] 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 9 to be tightly embedded in the groove 51, thereby preventing the groove 51 from being separated from the plastic layer 9, thereby preventing the cover plate 5 from falling off from the plastic layer 9. The elongated groove 51 can increase the fitting portion between the plastic layer 9 and the groove 51, thereby increasing the fitting strength between the groove 51 and the plastic layer 9.

[0039] Example 2

[0040] See also Figure 6 As a further optimization scheme of Example 1, in this embodiment, the LED FPC8 includes a substrate layer 81, a circuit layer 82 arranged on the upper surface of the substrate layer 81, and a metal heat dissipation layer 83 arranged on the lower surface of the substrate layer 81. The arrangement method can be that the circuit layer 82 and the metal heat dissipation layer 83 are respectively attached to the substrate layer 81 by double-sided adhesive. Since the thickness of the substrate layer 81 is relatively thin, the heat on the LED FPC8 can be diffused to the metal heat dissipation layer 83 through the substrate layer 81. The metal heat dissipation layer 83 can effectively increase the heat dissipation area of ​​the LED FPC8 and play a role in uniform heat dissipation, thereby improving the heat dissipation efficiency of the LED FPC8. The substrate layer 81 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 83 can be a copper foil layer.

[0041] Furthermore, the LED FPC 8 also includes at least one through-hole 84 penetrating the substrate layer 81, the circuit layer 82 and the metal heat dissipation layer 83, and the inner wall of the through-hole 84 is provided with a heat-conducting layer in contact with the circuit layer 82 and the metal heat dissipation layer 83. By utilizing the good thermal conductivity of the through-hole 84, the circuit layer 82 and the metal heat dissipation layer 83 on both sides of the substrate layer 81 can be electrically connected to play a good thermal conductivity function, 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.

[0042] Furthermore, a heat conductor connected to an external heat-conducting structure is disposed in the through hole 84, and the heat conductor is connected to the external heat-conducting structure from one side of the circuit layer 82, and is also in contact with the heat-conducting layer in the through hole 84, so that the circuit layer 82 and the metal heat dissipation layer 83 can be connected to the external heat-conducting structure through the through hole 84, so that the heat in the LED FPC 8 is diffused to the external heat-conducting structure through the heat conductor in the through hole 84, so as to further improve the heat dissipation efficiency of the LED FPC 8. Preferably, in order to enable the through hole 84 to be connected to the external heat-conducting structure, the through hole 84 is disposed at the edge of the LED FPC 8.

[0043] Furthermore, the metal heat dissipation layer 83 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.

[0044] 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.

[0045] 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 without a backlight module, 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 upper polarizer and the cover plate are bonded by optical glue, the lower polarizer is a total reflection lower polarizer, 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 a driver FPC, the side of the upper substrate away from the step is fixed with an LED lamp and an LED FPC, the upper surface of the cover plate is formed with a plurality of grooves by etching, the upper part of the cover plate is covered with a plastic layer, and the plastic layer is embedded in the plurality of grooves.

2. The liquid crystal display screen without backlight module according to claim 1, characterized in that: A touch glass is further arranged between the cover plate and the upper polarizer, the LED lamp and the LED FPC are arranged on the side of the touch glass, and a touch FPC is fixed on the side of the touch glass away from the LED lamp.

3. The liquid crystal display screen without backlight module according to claim 1, characterized in that: The shape of the groove is square or circular.

4. The liquid crystal display screen without backlight module according to claim 1, characterized in that: The groove is a closing groove which is narrow outside and wide inside.

5. The liquid crystal display screen without backlight module according to claim 4, characterized in that: The cross-sectional shape of the groove is an isosceles trapezoid.

6. The liquid crystal display screen without backlight module according to claim 4, characterized in that: The groove is in the shape of an elongated strip.

7. The liquid crystal display screen without backlight module according to claim 1, characterized in that: The LED 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.

8. The liquid crystal display screen without backlight module according to claim 7, characterized in that: The LED 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.

9. The liquid crystal display screen without backlight module according to claim 8, 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.

10. The liquid crystal display screen without backlight module according to claim 7, 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.

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