Liquid crystal display screen capable of preventing pixel shrinkage after UV irradiation

Abstract

The utility model discloses a liquid crystal display screen capable of preventing pixel shrinkage after UV irradiation, which comprises a lower polaroid, a lower substrate, an upper substrate, an upper polaroid, OCA optical cement and a cover plate which are sequentially overlapped from bottom to top, the cover plate and the upper polaroid are fully attached through the OCA optical cement, the OCA optical cement is UV blocking optical cement, and the lower substrate and the upper substrate are arranged on the upper polaroid. A plurality of grooves are formed in the upper surface of the cover plate through etching, the cover plate is covered with a plastic layer, and the plastic layer is embedded into the grooves. Due to the fact that the OCA optical cement is the UV blocking optical cement, the UV blocking optical cement is adopted to replace common OCA optical cement to be attached to the display screen and the cover plate, the UV blocking optical cement can effectively block UV light from directly irradiating liquid crystal or organic light-emitting materials in the display screen, the UV-resistant reliability of the display screen is improved, and the service life of the screen is prolonged.

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 capable of preventing pixels from shrinking after UV irradiation. Background Art

[0002] With the improvement of living standards, smart wearable devices such as bracelets and watches are becoming more and more common, and product competition is becoming more and more fierce. Consumers have higher and higher requirements for product performance, especially for wearable products used for outdoor sports, which basically require the display module to pass the UV light aging test. This type of reliability test has very strict requirements on products, because long-term direct exposure to UV light will cause irreversible damage to the liquid crystal or organic light-emitting materials in the display screen, causing the pixels in the display area to shrink, and ultimately manifest as uneven display problems such as partial bluing of the display area, thereby affecting product quality and reducing product competitiveness. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to prevent the pixels in the display area from shrinking due to long-term irradiation of UV light in a UV light aging experiment.

[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 prevents pixel shrinkage after UV irradiation, comprising a lower polarizer, a lower substrate, an upper substrate, an upper polarizer, an OCA optical glue and a cover plate which are stacked in sequence from bottom to top, the cover plate and the upper polarizer are fully bonded by the OCA optical glue, the OCA optical glue is a UV blocking optical glue, a plurality of grooves are formed on the upper surface of the cover plate by etching, a plastic layer is covered on the upper side of the cover plate, and the plastic layer is embedded in the plurality of the grooves.

[0006] As a preferred implementation of the liquid crystal display screen for preventing pixel shrinkage after UV irradiation provided by the utility model, the wavelength of light blocked by the UV blocking optical glue is less than or equal to 380nm.

[0007] As a preferred implementation of the liquid crystal display screen for preventing pixel shrinkage after UV irradiation 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 for preventing pixel shrinkage after UV irradiation provided by the utility model, the groove is a closing groove that is narrow on the outside and wide on the inside.

[0009] As a preferred implementation of the liquid crystal display screen for preventing pixel shrinkage after UV irradiation provided by the utility model, the cross-sectional shape of the groove is an isosceles trapezoid.

[0010] As a preferred embodiment of the liquid crystal display screen for preventing pixel shrinkage after UV irradiation provided by the utility model, the lower substrate is longer than the upper substrate and extends outward, a protrusion is provided on the edge of the upper surface of the lower substrate extending outward, and a buffer glue is provided on the upper surface of the lower substrate between the protrusion and the upper substrate, and the buffer glue abuts against the cover plate.

[0011] As a preferred implementation of the liquid crystal display screen for preventing pixel shrinkage after UV irradiation provided by the utility model, the upper surface of the protrusion is flush with the upper surface of the upper substrate.

[0012] As a preferred implementation of the liquid crystal display screen for preventing pixel shrinkage after UV irradiation provided by the utility model, the buffer glue is silicone glue.

[0013] As a preferred implementation of the liquid crystal display screen for preventing pixel shrinkage after UV irradiation provided by the utility model, a rounded corner is arranged between the protrusion and the lower substrate.

[0014] As a preferred implementation of the liquid crystal display screen for preventing pixel shrinkage after UV irradiation provided by the utility model, the upper surface of the lower substrate and the side surface of the protrusion are rough surfaces.

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

[0016] Since OCA optical adhesive is UV blocking optical adhesive, by using UV blocking optical tape instead of ordinary OCA optical adhesive to bond the display screen and the cover plate, UV blocking optical adhesive can effectively block UV light from directly irradiating the liquid crystal or organic light-emitting materials inside the display screen, thereby improving the UV resistance reliability of the display screen, extending the screen life, and avoiding pixel shrinkage in the display area and the resulting uneven display problems such as local bluing in the display area, thereby improving product quality, reducing the defective rate of LCD screens, 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 1 The utility model provides a structural schematic diagram of a liquid crystal display screen for preventing pixel shrinkage after UV irradiation.

[0019] Figure 2 for Figure 1Schematic 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 This is a schematic diagram of the structure of Example 2.

[0023] Description of Figure Numbers:

[0024] Lower polarizer 1; lower substrate 2; upper substrate 3; upper polarizer 4; OCA optical adhesive 5; cover plate 6; groove 61; plastic layer 7;

[0025] Protrusion 21; Buffer rubber 22. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The utility model provides a liquid crystal display screen for preventing pixel shrinkage after UV irradiation, comprising a lower polarizer, a lower substrate, an upper substrate, an upper polarizer, an OCA optical glue and a cover plate which are sequentially stacked from bottom to top, the cover plate and the upper polarizer are fully bonded by the OCA optical glue, the OCA optical glue is a UV blocking optical glue, a plurality of grooves are formed on the upper surface of the cover plate by etching, a plastic layer is covered on the upper side of the cover plate, and the plastic layer is embedded in the plurality of the grooves.

[0030] Since OCA optical adhesive is UV blocking optical adhesive, by using UV blocking optical tape instead of ordinary OCA optical adhesive to bond the display screen and the cover plate, UV blocking optical adhesive can effectively block UV light from directly irradiating the liquid crystal or organic light-emitting materials inside the display screen, thereby improving the UV resistance reliability of the display screen, extending the screen life, and avoiding pixel shrinkage in the display area and the resulting uneven display problems such as local bluing in the display area, thereby improving product quality, reducing the defective rate of LCD screens, and improving product competitiveness.

[0031] 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.

[0032] Example 1

[0033] See also Figures 1 to 4, a liquid crystal display screen for preventing pixel shrinkage after UV irradiation provided by the utility model, comprising a lower polarizer 1, a lower substrate 2, an upper substrate 3, an upper polarizer 4, an OCA optical adhesive 5 and a cover plate 6 which are sequentially stacked from bottom to top, the cover plate 6 and the upper polarizer 4 are fully bonded by the OCA optical adhesive 5, the OCA optical adhesive 5 is a UV blocking optical adhesive, a plurality of grooves 61 are formed on the upper surface of the cover plate 6 by etching, the upper part of the cover plate 6 is covered with a plastic layer 7, and the plastic layer 7 is embedded in the plurality of grooves 61. Since the OCA optical adhesive 5 is a UV blocking optical adhesive, the UV blocking optical adhesive tape is used to replace the ordinary OCA optical adhesive 5 to bond the two components of the display screen and the cover plate 6, and the UV blocking optical adhesive can effectively block the direct irradiation of UV light on the liquid crystal or organic light-emitting material inside the display screen, improve the UV resistance reliability of the display screen, extend the service life of the screen, avoid the shrinkage of pixels in the display area and the display unevenness caused by the local bluing of the display area, thereby improving the product quality, reducing the defective rate of the liquid crystal display screen, and improving the competitiveness of the product.

[0034] Since the upper surface of the cover plate 6 is covered with a plastic layer 7, a plurality of grooves 61 are formed downwardly on the upper surface of the cover plate 6 by etching, and a portion of the lower surface of the plastic layer 7 is embedded in each groove 61. Since the surface of the groove 61 formed by etching has a certain degree of roughness, the plastic layer 7 can be tightly bonded to the groove 61 to prevent the cover plate 6 and the plastic layer 7 from falling off. Since the upper surface of the cover plate 6 is covered with a plastic layer 7, and a plurality of grooves 61 are formed on the upper surface of the cover plate 6 by etching, and the plastic layer 7 can be embedded in the interior of the plurality of grooves 61, the grooves 61 formed by etching make the inner surface of the grooves 61 have a certain degree of roughness, and the surface of the grooves 61 with a certain degree of roughness can improve the bonding force between the grooves 61 and the plastic layer 7, thereby reducing the possibility of separation of the grooves 61 and the plastic layer 7. When the LCD screen is hit or falls, the plastic layer 7 on the upper surface of the cover plate 6 can directly withstand the external force, thereby preventing the external force from directly acting on the cover plate 6. Since the plastic layer 7 can absorb most of the energy, the remaining external force is very weak when it acts on the cover plate 6, thereby effectively reducing the risk of the cover plate 6 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 7 on the upper surface of the cover plate 6, and will not directly damage the cover plate 6. Therefore, it can be avoided that the cover plate 6 is damaged and the LCD screen cannot be used normally, which brings a better user experience to the user and improves the anti-fall ability of the LCD screen.

[0035] Furthermore, the wavelength of light blocked by the UV blocking optical adhesive is less than or equal to 380 nm, thereby preventing UV light from entering the interior of the liquid crystal display.

[0036] Furthermore, the shape of the groove 61 can be square or circular, and the cross-sectional shape of the groove 61 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 61 is an isosceles trapezoid, and the groove 61 is in the shape of an elongated strip. The isosceles trapezoid-shaped groove 61 can allow the plastic layer 7 to be tightly embedded in the groove 61, thereby preventing the groove 61 from separating from the plastic layer 7, thereby preventing the cover plate 6 from falling off from the plastic layer 7. The elongated groove 61 can increase the fitting portion between the plastic layer 7 and the groove 61, thereby increasing the fitting strength between the groove 61 and the plastic layer 7.

[0037] Example 2

[0038] See also Figure 5 As a further optimization scheme of Example 1, in this embodiment, the lower substrate 2 is longer than the upper substrate 3 and extends outward, and a protrusion 21 is provided on the edge of the upper surface of the lower substrate 2 extending outward, and a buffer glue 22 is provided on the upper surface of the lower substrate 2 between the protrusion 21 and the upper substrate 3, and the buffer glue 22 abuts against the cover plate 6. Since the edge of the lower substrate 2 is provided with a protrusion 21, the protrusion 21 can limit the flow of the buffer glue 22, so that the shape of the buffer glue 22 is easy to control, and there will be no overflow of glue or incomplete glue dispensing. Thereby preventing the LCD screen from being unable to be assembled with the casing. In addition, the problem of poor buffering effect caused by incomplete glue dispensing and easy rupture of the lower substrate 2 is avoided, and the LCD screen is prevented from displaying abnormally.

[0039] Furthermore, the upper surface of the protrusion 21 is flush with the upper surface of the upper substrate 3 to further limit the flow of the buffer glue 22, so that the shape of the buffer glue 22 is easy to control without overflowing glue or incomplete glue dispensing.

[0040] Furthermore, the buffer glue 22 is silicone glue.

[0041] Furthermore, a chamfer is provided between the protrusion 21 and the lower substrate 2 so that the buffer glue 22 can more easily fill the space between the protrusion 21 on the upper surface of the lower substrate 2 and the upper substrate 3. The protrusion 21 with a chamfer can make the buffer glue 22 flow more smoothly into the space between the protrusion 21 on the upper surface of the lower substrate 2 and the upper substrate 3, making it less likely for bubbles to appear.

[0042] Furthermore, the upper surface of the lower substrate 2 and the side surfaces of the protrusions 21 are rough surfaces to improve the fixing effect of the buffer glue 22 .

[0043] Furthermore, the rough surface is a frosted surface or a diamond knurled surface to further improve the fixing effect of the buffer glue 22 .

[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 for preventing pixel shrinkage after UV irradiation, characterized in that: It includes a lower polarizer, a lower substrate, an upper substrate, an upper polarizer, an OCA optical glue and a cover plate which are stacked in sequence from bottom to top. The cover plate and the upper polarizer are fully bonded by the OCA optical glue, and the OCA optical glue is a UV blocking optical glue. 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.

2. The liquid crystal display screen for preventing pixel shrinkage after UV irradiation according to claim 1, characterized in that: The wavelength of light blocked by the UV blocking optical adhesive is less than or equal to 380nm.

3. The liquid crystal display screen for preventing pixel shrinkage after UV irradiation according to claim 1, characterized in that: The shape of the groove is square or circular.

4. The liquid crystal display screen for preventing pixel shrinkage after UV irradiation 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 for preventing pixel shrinkage after UV irradiation according to claim 4, characterized in that: The cross-sectional shape of the groove is an isosceles trapezoid.

6. The liquid crystal display screen for preventing pixel shrinkage after UV irradiation according to claim 1, characterized in that: The lower substrate is longer than the upper substrate and extends outwards, a protrusion is arranged on the edge of the upper surface of the lower substrate extending outwards, a buffer glue is arranged on the upper surface of the lower substrate between the protrusion and the upper substrate, and the buffer glue abuts against the cover plate.

7. The liquid crystal display screen for preventing pixel shrinkage after UV irradiation according to claim 6, characterized in that: An upper surface of the protrusion is flush with an upper surface of the upper substrate.

8. The liquid crystal display screen for preventing pixel shrinkage after UV irradiation according to claim 6, characterized in that: The buffer glue is silicone glue.

9. The liquid crystal display screen for preventing pixel shrinkage after UV irradiation according to claim 6, characterized in that: A rounded corner is arranged between the protrusion and the lower substrate.

10. The liquid crystal display screen for preventing pixel shrinkage after UV irradiation according to claim 6, characterized in that: The upper surface of the lower substrate and the side surfaces of the protrusion are rough surfaces.

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