Backlight source module and liquid crystal display screen
By setting a diaphragm in the backlight module between the oral glue and the upper light-enhancing film, the wrinkle problem caused by thermal expansion and contraction of the material is solved, ensuring the normal display and maintenance efficiency of the liquid crystal display module.
Patent Information
- Application Number
- CN202323554019.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2033-12-25
AI Technical Summary
In the most common backlight sources, the thermal expansion and contraction characteristics of the material lead to inconsistent shrinkage of the oral glue and the upper light-enhancing film, resulting in the inability to stretch and wrinkles, resulting in the adverse phenomenon of shadows in the liquid crystal display module.
In the backlight module, a diaphragm is provided between the oral glue and the upper light-enhancing film to avoid the oral glue directly adhering to the upper light-enhancing film, thereby reducing the wrinkle problem caused by inconsistent shrinkage.
Through the setting of the diaphragm, the lip glue affects the extension of the light-enhancing film, prevents wrinkles, and makes the backlight module perform normally in high-temperature tests, and improves maintenance efficiency.
Smart Images
Figure CN222529619U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of liquid crystal display technology, and in particular to a backlight module and a liquid crystal display screen. Background Art
[0002] Liquid crystal display module (LCM or LCD Module) is a display device widely used in many fields such as mobile phones, tablet computers, game consoles, instruments and meters, industrial control equipment, etc. Liquid crystal display (LCD) does not emit light by itself and needs a backlight to provide light to display graphics.
[0003] The luminous effect of the backlight source will directly affect the display effect of the liquid crystal display module (LCM). The stacking diagram of the backlight source structure is shown in the figure. Figure 1 As shown in the figure, the top optical film of a common backlight source is a brightness enhancement film. The edge of the film will refract light, and the edge will be brighter than other places, causing the phenomenon of "bright edge" on the LCD module. In order to improve the visual effect of the LCD module, the edge of the film is generally covered with a light-shielding adhesive. The material is a double-sided black adhesive with a "mouth" shape, that is, a "mouth" adhesive. At the same time, it also plays the role of fixing the film and bonding the backlight source to the liquid crystal display (LCD).
[0004] In the most common backlight source, the topmost film is the upper brightening film. Due to the characteristics of thermal expansion and contraction of the material, the shrinkage rates of the two materials, the adhesive tape and the upper brightening film, are inconsistent. After being fixed by the adhesive tape, the upper brightening film cannot stretch, and wrinkles will appear on the upper brightening film, causing the LCM to display shadows. This is the most common adverse phenomenon in high-temperature testing of liquid crystal display modules (LCMs). Utility Model Content
[0005] The technical problem to be solved by the present application is that in the most common backlight source, the topmost film is the upper brightness enhancement film. Due to the characteristics of thermal expansion and contraction of the material, the shrinkage rates of the two materials, the adhesive tape and the upper brightness enhancement film, are inconsistent. After being fixed by the adhesive tape, the upper brightness enhancement film cannot stretch, and wrinkles will appear on the upper brightness enhancement film, causing the undesirable phenomenon of shadow on the LCM display. This is the most common undesirable phenomenon in high temperature tests of liquid crystal display modules (LCMs).
[0006] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a backlight module and a liquid crystal display screen.
[0007] In the first aspect, the utility model discloses a backlight source module, which includes a mouth glue, an upper brightness enhancement film, and a diaphragm. The four edges of the mouth glue are respectively connected to the edges of the upper brightness enhancement film, one side of the diaphragm is connected to the mouth glue, and the other side is connected to the upper brightness enhancement film. The diaphragm is arranged between the mouth glue and the upper brightness enhancement film.
[0008] Preferably, the thickness of the diaphragm is 0.01 mm±0.003 mm.
[0009] Preferably, the diaphragm is a black film.
[0010] Preferably, both side surfaces of the diaphragm are adhesive.
[0011] Preferably, the diaphragm includes three parts, which are divided into a first part, a second part and a third part. The first part, the second part and the third part are connected in sequence, and the three parts form an I-shape.
[0012] Preferably, the rubber seal comprises a protrusion and three edges, and the three parts are connected to the three edges.
[0013] Preferably, a glue frame is included, the mouth glue is connected to the glue frame, the upper brightness enhancement film is placed within the range of the glue frame, and the mouth glue covers the gap between the glue frame and the upper brightness enhancement film.
[0014] Preferably, the rubber seal includes a first contact end and a second contact end, the first contact end is connected to the rubber frame, and the second contact end is connected to the diaphragm.
[0015] Preferably, a lower brightness enhancement film is included, the lower brightness enhancement film is connected to the upper brightness enhancement film, and the lower brightness enhancement film is arranged on a side of the upper brightness enhancement film away from the word glue.
[0016] In a second aspect, the utility model discloses a liquid crystal display screen, which includes the above-mentioned backlight source module.
[0017] The above technical solution provided by this application has the following advantages compared with the prior art:
[0018] The present application provides a backlight module and a liquid crystal display screen, wherein a diaphragm is arranged between the mouth glue and the upper brightening film in the backlight module, so that the mouth glue is prevented from directly adhering to the upper brightening film. When the backlight source is repaired, the mouth glue will not damage the upper brightening film when it is dismantled, so that the upper brightening film will not be scrapped during repair, thereby avoiding the problem of product damage during repair. At the same time, there is a diaphragm between the mouth glue and the upper brightening film, which can prevent the mouth glue from affecting the stretching of the upper brightening film and prevent it from wrinkling, so that the backlight module can operate normally. In addition, the current mouth glue setting is easier to disassemble than before, thereby improving the efficiency of backlight module maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0021] Figure 1 A schematic diagram of the structure of a backlight module provided in this application;
[0022] Figure 2 A schematic diagram of the connection structure between the diaphragm and the word glue of a backlight module provided in this application;
[0023] Figure 3 for Figure 1 The enlarged schematic diagram at P in the middle;
[0024] Figure 4 for Figure 2 Enlarged schematic diagram of the middle Q.
[0025] Description of the drawings:
[0026] 1. Backlight module; 11. Glue frame; 12. Glue for mouth; 13. Upper brightness enhancement film; 14. Diaphragm; 15. Lower brightness enhancement film. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0028] See also Figure 1-4 The utility model discloses a backlight module 1, including a glue frame 11, a mouth glue 12, an upper brightness enhancement film 13, and a diaphragm 14. The four edges of the mouth glue 12 are respectively connected to the edges of the upper brightness enhancement film 13, one side of the diaphragm 14 is connected to the mouth glue 12, and the other side is connected to the upper brightness enhancement film 13. The diaphragm 14 is arranged between the mouth glue 12 and the upper brightness enhancement film 13. The mouth glue 12 is connected to the glue frame 11, and the upper brightness enhancement film 13 is placed within the range of the glue frame 11. The mouth glue 12 covers the gap between the glue frame 11 and the upper brightness enhancement film 13.
[0029] Specifically, the word glue 12 is used to adhere the backlight source to the liquid crystal display, the edge of the diaphragm 14 is flush with the edge of the upper brightness enhancement film 13, the word glue 12 contacts the diaphragm 14 and the glue frame 11 respectively, and the word glue 12 blocks the gap between the glue frame 11 and the upper brightness enhancement film 13 to avoid light leakage from the backlight source group, and at the same time, reduce the entry of dust and foreign matter, improve the cleanliness of the environment in the backlight source group, and avoid the backlight source group from being defective. The diaphragm 14 can isolate the word glue 12 from the upper brightness enhancement film 13, and can improve the film wrinkles caused by the inconsistent shrinkage rate of the word glue 12 and the upper brightness enhancement film 13 in the high temperature test of the product, so that the word glue 12 and the upper brightness enhancement film 13 can ensure the normal film material when the product is heated.
[0030] It can be understood that a diaphragm 14 is arranged between the mouth glue 12 and the upper brightening film 13, and the diaphragm 14 prevents the mouth glue 12 from directly adhering to the upper brightening film 13. When the backlight source is repaired, the upper brightening film 13 will not be damaged when the mouth glue 12 is disassembled, so that the upper brightening film 13 will not be scrapped during repair, thereby avoiding the problem of product damage during repair. In addition, the current setting of the mouth glue 12 is easier to disassemble than before, thereby improving the efficiency of repairing the backlight source module 1.
[0031] As an embodiment, the diaphragm 14 is a black film. The use of the black film can avoid the light leakage problem at the edge of the backlight source group.
[0032] As an embodiment, the thickness of the diaphragm 14 is 0.01 mm±0.003 mm.
[0033] The diaphragm 14 includes three parts, namely, a first part, a second part and a third part, the first part, the second part and the third part are connected in sequence, and the three parts form an I-shape. The mouth glue 12 includes a protrusion and three edges, and the three parts are connected to the three edges.
[0034] Specifically, the mouth glue 12 is in the shape of an I, consisting of a protrusion and three edges, the three edges form an I-shape, the protrusion is connected to the three edges at the opening of the I-shape, and the three parts are connected to the three edges, wherein the edges on both sides of the diaphragm 14 are sticky, the three parts are bonded to the three edges, and the other surface of the diaphragm 14 is bonded to the upper brightening film 13, so that the mouth glue 12, the diaphragm 14 and the upper brightening film 13 are combined together.
[0035] The rubber seal 12 includes a first contact end and a second contact end. The first contact end is connected to the rubber frame 11 , and the second contact end is connected to the diaphragm 14 .
[0036] Specifically, the first contact end is connected to the second contact end, the second contact end of the three parts is bonded to the diaphragm 14 , and the first contact end of the three parts is bonded to the glue frame 11 , so that the word glue 12 fixes the diaphragm 14 and the upper brightening film 13 within the range of the glue frame 11 .
[0037] The backlight module 1 includes a lower brightness enhancement film 15, which is connected to the upper brightness enhancement film 13 and arranged on a side of the upper brightness enhancement film 13 away from the word glue 12. Specifically, the lower brightness enhancement film 15 is superimposed on the upper brightness enhancement film 13 to increase the brightness of the backlight module 1.
[0038] In the second aspect, the utility model discloses a liquid crystal display screen, which includes the above-mentioned backlight module 1. Specifically, a diaphragm 14 is arranged between the word glue 12 and the upper light-enhancing film 13 in the backlight module 1 in the liquid crystal display screen, and the word glue 12 can be prevented from being directly bonded to the upper light-enhancing film 13 by the diaphragm 14. When the backlight source is repaired, the word glue 12 will not damage the upper light-enhancing film 13 when it is disassembled, so that the upper light-enhancing film 13 will not be scrapped during the repair, and the upper light-enhancing film 13 can continue to be used, avoiding the problem of product damage during the repair; in addition, the word glue 12 blocks the gap between the glue frame 11 and the upper light-enhancing film 13, avoiding the light leakage problem of the backlight group, and at the same time, reducing the entry of dust and foreign matter, improving the cleanliness of the environment in the backlight group, and avoiding the backlight group from being defective.
[0039] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0040] 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" 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.
[0041] In addition, the terms "first" and "second" 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" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0042] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.
[0045] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.
[0046] The above is a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A backlight module, characterized in that: It includes a mouth glue, an upper brightening film, and a diaphragm. The four edges of the mouth glue are respectively connected to the edges of the upper brightening film. One side of the diaphragm is connected to the mouth glue, and the other side is connected to the upper brightening film. The diaphragm is arranged between the mouth glue and the upper brightening film.
2. The backlight module according to claim 1, characterized in that: The thickness of the diaphragm is 0.01 mm±0.003 mm.
3. The backlight module according to claim 1, characterized in that: The diaphragm is a black film.
4. The backlight module according to claim 1, characterized in that: The surfaces on both sides of the diaphragm are sticky.
5. The backlight module according to claim 1, characterized in that: The diaphragm includes three parts, which are divided into a first part, a second part and a third part. The first part, the second part and the third part are connected in sequence, and the three parts form an I-shape.
6. The backlight module according to claim 5, characterized in that: The word-shaped glue comprises a protruding portion and three edges, and the three parts are connected to the three edges.
7. The backlight module according to claim 1, characterized in that: It comprises a glue frame, the word glue is connected to the glue frame, the upper brightness enhancement film is placed within the range of the glue frame, and the word glue covers the gap between the glue frame and the upper brightness enhancement film.
8. The backlight module according to claim 7, characterized in that: The word-shaped glue comprises a first contact end and a second contact end, the first contact end is connected to the glue frame, and the second contact end is connected to the diaphragm.
9. The backlight module according to claim 1, characterized in that: It comprises a lower brightness enhancement film, which is connected to the upper brightness enhancement film and is arranged on a side of the upper brightness enhancement film away from the word glue.
10. A liquid crystal display screen, characterized in that: A backlight module comprising any one of claims 1 to 9.