Liquid crystal display screen capable of preventing OCA (Optical Clear Adhesive) from overflowing

Abstract

The utility model discloses a liquid crystal display screen capable of preventing OCA (Optical Clear Adhesive) from overflowing, which comprises a lower polaroid, a lower substrate, an upper substrate, an upper polaroid, OCA and a cover plate which are sequentially overlapped from bottom to top, and the OCA is arranged between the upper polaroid and the cover plate. The lower surface of the cover plate is provided with a glue overflowing groove surrounding the OCA, the edge of the lower surface of the cover plate is provided with shading ink, and the outer surface of the glue overflowing groove and the lower surface of the cover plate are coated with the shading ink. Due to the fact that the glue overflowing groove surrounding the OCA is formed in the lower surface of the cover plate, when the OCA overflows outwards under pressure, redundant glue can flow into and be stored in the glue overflowing groove, the excessive glue is prevented from being diffused outwards continuously, the glue overflowing range is limited, and the service life of the OCA is prolonged. The problems that the whole display module cannot be assembled and the backlight module leaks light due to the fact that OCA overflows can be effectively avoided.

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 OCA optical glue from overflowing. Background Art

[0002] The laminated structure of the fully laminated LCD module used in mobile phone displays is generally composed of a protective cover, an LCD display, and a backlight module from top to bottom. After the LCD display and the backlight module are assembled, they are glued together with the protective cover using an OCA optical adhesive using a fully laminated process. The protective cover CG is composed of a glass substrate and an edge shading ink layer thereon.

[0003] In actual production, the OCA optical adhesive is first pasted on the cover plate using a laminating device, and then the cover plate and the other side of the OCA optical adhesive are pre-pressed on the LCD display screen with a certain pressure. The OCA optical adhesive is then cured and formed in a UV oven.

[0004] During the pre-pressing process, because the OCA optical adhesive has not yet been cured, it will deform and flow under a certain pressure. This will lead to the following two problems: First, the borders of existing mobile phone display screens are getting smaller and smaller. Excessive glue overflow around the edges may cause interference with the surroundings of the display module during assembly, resulting in the inability to assemble the display module; second, in order to prevent the light leaking from the side of the backlight module from affecting the imaging effect of the entire camera, a light-shielding Mylar is required to block the light. If there is a lot of OCA optical adhesive overflow in this part, the light-shielding Mylar will not be attached smoothly, causing light leakage from the backlight module, affecting the imaging of the entire camera. Utility Model Content

[0005] The technical problem to be solved by the utility model is how to prevent overflow of OCA optical glue, which may lead to the inability to assemble the entire display module and light leakage of the backlight module.

[0006] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0007] In order to solve the above technical problems, the utility model provides a liquid crystal display screen that prevents OCA optical glue from overflowing, which includes a lower polarizer, a lower substrate, an upper substrate, an upper polarizer, OCA optical glue and a cover plate which are stacked in sequence from bottom to top, the OCA optical glue is arranged between the upper polarizer and the cover plate, the lower surface of the cover plate is provided with an overflow groove surrounding the OCA optical glue, the edge of the lower surface of the cover plate is provided with light-shielding ink, and the light-shielding ink is coated on the outer surface of the overflow groove and the lower surface of the cover plate.

[0008] As a preferred implementation of the liquid crystal display screen for preventing OCA optical glue from overflowing provided by the utility model, the cross-sectional shape of the overflowing groove is V-shaped or semicircular.

[0009] As a preferred implementation of the liquid crystal display screen for preventing OCA optical glue from overflowing provided by the utility model, the thickness of the cover plate is 0.8 mm, the thickness of the OCA optical glue is 0.1 mm, and the depth of the overflow groove is 0.05 mm.

[0010] As a preferred embodiment of the liquid crystal display screen for preventing overflow of OCA optical glue provided by the utility model, 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.

[0011] As a preferred implementation of the liquid crystal display screen for preventing OCA optical glue from overflowing provided by the utility model, the shape of the groove is square or circular.

[0012] As a preferred implementation of the liquid crystal display screen for preventing OCA optical glue from overflowing provided by the utility model, the groove is a closing groove that is narrow on the outside and wide on the inside.

[0013] As a preferred implementation of the liquid crystal display screen for preventing OCA optical glue from overflowing provided by the utility model, the cross-sectional shape of the groove is an isosceles trapezoid.

[0014] As a preferred embodiment of the liquid crystal display screen for preventing overflow of OCA optical glue 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.

[0015] As a preferred implementation of the liquid crystal display screen for preventing overflow of OCA optical glue provided by the utility model, the upper surface of the protrusion is flush with the upper surface of the upper substrate.

[0016] As a preferred implementation of the liquid crystal display screen for preventing overflow of OCA optical adhesive provided by the utility model, a rounded corner is arranged between the protrusion and the lower substrate.

[0017] The utility model has the following beneficial effects:

[0018] Since an overflow groove surrounding the OCA optical glue is provided on the lower surface of the cover plate, when the OCA optical glue overflows outward under pressure, excess glue will flow into and be stored in the overflow groove to prevent it from continuing to diffuse outward, thereby limiting the overflow range. This can effectively prevent the overflow of the OCA optical glue from causing the display module to be unable to be assembled and the backlight module to leak light. The edge of the lower surface of the cover plate is provided with light-shielding ink, which is coated on the outer surface of the overflow groove and the lower surface of the cover plate. The overflow groove is in the light-shielding ink area at the edge of the cover plate, and therefore will not affect the appearance of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 The utility model provides a structural schematic diagram of a liquid crystal display screen for preventing OCA optical glue from overflowing.

[0021] Figure 2 This is a schematic diagram of the structure of Example 2.

[0022] Figure 3 for Figure 2 Schematic diagram of the decomposition structure.

[0023] Figure 4 for Figure 2 Schematic diagram of the improved structure.

[0024] Figure 5 This is a schematic diagram of the structure of Example 3.

[0025] Description of Figure Numbers:

[0026] Lower polarizer 1; lower substrate 2; upper substrate 3; upper polarizer 4; OCA optical glue 5; cover plate 6; glue overflow groove 61;

[0027] Plastic layer 7; groove 62;

[0028] Protrusion 21; Buffer rubber 22. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The utility model provides a liquid crystal display screen for preventing OCA optical glue from overflowing, 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 OCA optical glue being arranged between the upper polarizer and the cover plate, a glue overflow groove surrounding the OCA optical glue being opened on the lower surface of the cover plate, a light-shielding ink being arranged on the edge of the lower surface of the cover plate, and the light-shielding ink being coated on the outer surface of the glue overflow groove and the lower surface of the cover plate.

[0033] Since an overflow groove surrounding the OCA optical glue is provided on the lower surface of the cover plate, when the OCA optical glue overflows outward under pressure, excess glue will flow into and be stored in the overflow groove to prevent it from continuing to diffuse outward, thereby limiting the overflow range. This can effectively prevent the overflow of the OCA optical glue from causing the display module to be unable to be assembled and the backlight module to leak light. The edge of the lower surface of the cover plate is provided with light-shielding ink, which is coated on the outer surface of the overflow groove and the lower surface of the cover plate. The overflow groove is in the light-shielding ink area at the edge of the cover plate, and therefore will not affect the appearance of the display module.

[0034] 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.

[0035] Example 1

[0036] See also Figure 1 , a liquid crystal display screen for preventing OCA optical glue from overflowing is provided by the utility model, which includes a lower polarizer 1, a lower substrate 2, an upper substrate 3, an upper polarizer 4, an OCA optical glue 5 and a cover plate 6 which are sequentially stacked from bottom to top, the OCA optical glue 5 is arranged between the upper polarizer 4 and the cover plate 6, and an overflow groove 61 surrounding the OCA optical glue 5 is opened on the lower surface of the cover plate 6, and a light-shielding ink is arranged on the edge of the lower surface of the cover plate 6, and the light-shielding ink is coated on the outer surface of the overflow groove 61 and the lower surface of the cover plate 6. Since the lower surface of the cover plate 6 is provided with an overflow groove 61 surrounding the OCA optical glue, when the OCA optical glue 5 overflows outward under pressure, the excess glue will flow into and be stored in the overflow groove 61 to prevent it from continuing to diffuse outward, thereby limiting the overflow range, which can effectively prevent the overflow of the OCA optical glue 5 and cause the display module to be unable to be assembled and the backlight module to leak light; the edge of the lower surface of the cover plate 6 is provided with shading ink, and the shading ink is coated on the outer surface of the overflow groove 61 and the lower surface of the cover plate 6, and the overflow groove 61 is in the shading ink area at the edge of the cover plate 6, so it will not affect the appearance of the display module.

[0037] Furthermore, the shape of the overflow glue groove 61 can be convenient for etching shape design, and the cross section is not limited to semicircular, V-shaped, etc. The thickness of the cover plate 6 commonly used in the industry is about 0.8mm, and the thickness of the OCA optical glue 5 is about 0.1mm. The etching depth of the overflow glue groove 61 can be designed to be 0.05mm, and adjusted according to the actual overflow glue amount.

[0038] Example 2

[0039] See also Figures 2 to 4 As a further optimization scheme of Example 1, in this embodiment, the upper surface of the cover plate 6 is covered with a plastic layer 7, and a plurality of grooves 62 are formed downward 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 62. Since the surface of the groove 62 formed by etching has a certain degree of roughness, the plastic layer 7 can be tightly bonded to the groove 62 to prevent the cover plate 6 and the plastic layer 7 from falling off. Since the upper part of the cover plate 6 is covered with a plastic layer 7, and a plurality of grooves 62 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 62, the grooves 62 formed by etching make the inner surface of the grooves 62 have a certain degree of roughness, and the surface of the grooves 62 with a certain degree of roughness can improve the bonding force between the grooves 62 and the plastic layer 7, thereby reducing the possibility of separation of the grooves 62 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.

[0040] Furthermore, the shape of the groove 62 can be square or circular, and the cross-sectional shape of the groove 62 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 62 is an isosceles trapezoid, and the groove 62 is in the shape of an elongated strip. The isosceles trapezoid-shaped groove 62 can allow the plastic layer 7 to be tightly embedded in the groove 62, thereby preventing the groove 62 from separating from the plastic layer 7, thereby preventing the cover plate 6 from falling off from the plastic layer 7. The elongated groove 62 can increase the fitting portion between the plastic layer 7 and the groove 62, thereby increasing the fitting strength between the groove 62 and the plastic layer 7.

[0041] Example 3

[0042] See also Figure 5As 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 OCA optical glue from overflowing. It is 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 OCA optical glue is arranged between the upper polarizer and the cover plate. The lower surface of the cover plate is provided with an overflow glue groove surrounding the OCA optical glue. The edge of the lower surface of the cover plate is provided with shading ink. The shading ink is coated on the outer surface of the overflow glue groove and the lower surface of the cover plate.

2. The liquid crystal display screen for preventing OCA optical adhesive from overflowing according to claim 1, It is characterized in that The cross-sectional shape of the overflowing glue groove is V-shaped or semicircular.

3. The liquid crystal display screen for preventing OCA optical adhesive from overflowing according to claim 1, It is characterized in that The thickness of the cover plate is 0.8 mm, the thickness of the OCA optical glue is 0.1 mm, and the depth of the overflow glue groove is 0.05 mm.

4. The liquid crystal display screen for preventing OCA optical adhesive from overflowing according to claim 1, It is 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.

5. The liquid crystal display screen for preventing OCA optical adhesive from overflowing according to claim 4, It is characterized in that The shape of the groove is square or circular.

6. The liquid crystal display screen for preventing OCA optical adhesive from overflowing according to claim 4, It is characterized in that The groove is a closing groove which is narrow outside and wide inside.

7. The liquid crystal display screen for preventing OCA optical adhesive from overflowing according to claim 6, It is characterized in that The cross-sectional shape of the groove is an isosceles trapezoid.

8. The liquid crystal display screen for preventing OCA optical adhesive from overflowing according to claim 1, It is 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.

9. The liquid crystal display screen for preventing OCA optical adhesive from overflowing according to claim 8, It is characterized in that An upper surface of the protrusion is flush with an upper surface of the upper substrate.

10. The liquid crystal display screen for preventing OCA optical adhesive from overflowing according to claim 8, It is characterized in that A rounded corner is arranged between the protrusion and the lower substrate.

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