High-performance hybrid liquid crystal display screen LED backlight and manufacturing method

Abstract

The application discloses an LED backlight source of a high-performance mixed liquid crystal display and a manufacturing method thereof, and relates to the technical field of high-performance mixed liquid crystal display, wherein the backlight source comprises a backboard, a light guide plate, a diffusion sheet, a light enhancement sheet and a liquid crystal panel; a light emitting chamber is arranged in the backboard, a light source part is installed in the light emitting chamber, and is fixed through an installation gap between the light source part and the light guide plate. A shielding part is arranged above the installation gap, and the shielding part and the installation gap jointly form a closed space, so that the light of the light source part effectively acts on the light guide plate. A butt joint part is further arranged in the backboard, and the butt joint part can be switched from a first state to a second state when the ambient temperature rises to a preset temperature. In the first state, the butt joint part is kept apart from the diffusion sheet and the light enhancement sheet; and in the second state, the butt joint part abuts against the diffusion sheet and the light enhancement sheet, and the diffusion sheet and the light enhancement sheet are fixed in the backboard through the double restriction of the side wall of the backboard, so that the light efficiency of the backlight source is optimized.

Description

Technical Field

[0001] This invention relates to the field of high-performance hybrid liquid crystal display technology, and in particular to an LED backlight for a high-performance hybrid liquid crystal display and its manufacturing method. Background Technology

[0002] High-performance hybrid LCDs are displays that combine liquid crystal display (LCD) technology with other display technologies such as OLED, quantum dot, or backlighting technology, aiming to provide higher brightness, color accuracy, contrast, and faster response times. Compared to traditional LCDs, hybrid LCDs typically employ innovative backlighting systems or display panel structures to improve display performance. The backlight is a light source located behind the LCD, and its emission directly affects the visual effect of the LCD module. LCDs themselves do not emit light; they display graphics or characters as a result of light modulation and are widely used in various industries.

[0003] In related technologies, the backlight consists of a light guide plate, a diffuser, a brightness enhancement sheet, and a liquid crystal panel stacked sequentially in a back panel. The light source enters from one side of the light guide plate, is diffused by the diffuser, and then illuminates the brightness enhancement sheet to enhance the light. Finally, the enhanced light is diffused from the brightness enhancement sheet to the entire liquid crystal panel.

[0004] Through research, the inventors discovered that during use, the backlight often fails to achieve the expected brightness displayed on the LCD panel. Summary of the Invention

[0005] This invention discloses an LED backlight for a high-performance hybrid liquid crystal display and its manufacturing method, in order to solve the technical problem that the brightness of backlights in related technologies does not meet the expected effect.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A high-performance hybrid liquid crystal display LED backlight includes a backplate, within which a light guide plate, a diffuser, a brightness enhancement film, and a liquid crystal panel are disposed from bottom to top. The backplate also includes: a light source unit, wherein a light-emitting chamber is pre-reserved on one side of the light guide plate within the backplate, and the light source unit is installed in the light-emitting chamber; a mounting part, disposed within the light-emitting chamber, with a mounting gap formed between the mounting part and one end of the light guide plate within the light-emitting chamber, and the light source unit located within the mounting gap; and a shielding part, disposed between the mounting part and the light guide plate and above the mounting gap, forming a space enclosing the light source unit together with the mounting gap, so that the light emitted by the light source unit acts on the light guide plate. A light plate; an abutting portion disposed on the shielding portion, the abutting portion having a first state and a second state, and the abutting portion being able to switch from the first state to the second state when the ambient temperature rises to a preset temperature, the preset temperature being configured as the ambient temperature after the light source portion of the LED backlight stably emits light when it is powered on during normal operation; wherein, when the abutting portion is in the first state, the abutting portion is in a spaced-out state with the diffuser and the brightness enhancement sheet respectively; when the abutting portion is in the second state, the abutting portion abuts against the diffuser and the brightness enhancement sheet in the length direction of the back plate, so that the diffuser and the brightness enhancement sheet are confined within the back plate under the dual constraint of the abutting portion and the side wall of the back plate.

[0008] Optionally, the shielding part includes a shielding section and a connecting section. One end of the connecting section is connected to the mounting part. The shielding section is bent relative to the connecting section, and the end of the shielding section away from the connecting section is inclined downward and abuts against the upper surface of the light guide plate, so as to form a space that encloses the light source part together with the mounting gap.

[0009] Optionally, the connecting section includes an insertion sub-part and a snap-fit ​​sub-part. At least one set of snap-fit ​​sub-parts is provided on the insertion sub-part, and the snap-fit ​​sub-part and the insertion sub-part are elastically connected, allowing the snap-fit ​​sub-part to tilt relative to the insertion sub-part. The angle formed by the snap-fit ​​sub-part tilting relative to the insertion sub-part in its natural state is an acute angle. The mounting portion has a horizontally connected insertion channel and a mating cavity. The height of the mating cavity is greater than the height of the insertion channel. The height of the insertion channel is adapted to the thickness of the insertion sub-part, and the insertion... The channel is used for inserting the insert part to drive the snap-fit ​​part into the abutment cavity; the side wall of the insert part has a receiving groove for the snap-fit ​​part to be attached to, wherein, during the process of the insert part driving the snap-fit ​​part into the insertion channel, the snap-fit ​​part is attached to the receiving groove under the restriction of the inner side wall of the insertion channel; after the insert part drives the snap-fit ​​part into the abutment cavity, the snap-fit ​​part automatically moves away from the receiving groove under its own elasticity and abuts against the inner wall of the abutment cavity to prevent part of the insert part from falling out of the abutment cavity.

[0010] Optionally, the abutting portion includes a first sub-portion and a second sub-portion, both of which are inclinedly disposed at the end of the shielding section away from the connecting section. When the abutting portion is in the second state, the first sub-portion abuts against the end wall of the brightness enhancement sheet, and the second sub-portion abuts against the end wall of the diffuser sheet.

[0011] Optionally, the abutting portion is configured as a structural component made of shape memory alloy material, and the abutting portion is configured to switch from a first state to a second state when the temperature is greater than a preset value; wherein, the first sub-part is configured to deform towards the end wall of the brightness enhancement sheet when the temperature is greater than the preset value; and the second sub-part is configured to deform towards the end wall of the diffuser sheet when the temperature is greater than the preset value.

[0012] Optionally, the length of the first sub-part is greater than the length of the second sub-part. During initial installation, both the first and second sub-parts form an angle with the blocking section, and the angle is an acute angle.

[0013] Optionally, the upper surface of the light guide plate is provided with a rubber strip, and the intersection of the blocking section and the abutting part abuts against the upper surface of the rubber strip.

[0014] Optionally, it also includes a discharge section, a portion of which is disposed on the shielding portion and the abutting portion, and another portion extends to the outside of the back plate and is used for electrical connection with the ground wire.

[0015] Optionally, the discharge section includes a grounding wire, a first conductive film, and a second conductive film. The grounding wire is disposed on the upper surface of the shielding section, and a transverse channel is transversely passed through the mounting section and the back plate for the grounding wire to pass through. The grounding wire extends to the outside through the transverse channel and is connected to the ground wire of the outside. The first conductive film is disposed on the upper surface of the first sub-section, and a portion of the first conductive film covers the end wall of the first sub-section away from the shielding section, so that when the contact portion switches from the first state to the second state, the first conductive film is in contact with the end wall of the brightness enhancement film. The second conductive film is disposed on the upper surface of the second sub-section, and a portion of the second conductive film covers the end wall of the second sub-section away from the shielding section, so that when the contact portion switches from the first state to the second state, the second conductive film is in contact with the end wall of the diffuser.

[0016] This invention also discloses a method for manufacturing an LED backlight for a high-performance hybrid liquid crystal display screen, used to manufacture an LED backlight for any of the above-described high-performance hybrid liquid crystal display screens, comprising the following steps:

[0017] Install the light guide plate inside the back plate, such that one end of the light guide plate abuts against the inner side wall of the back plate and the other end is spaced from the other inner side wall of the back plate, so as to reserve the light-emitting chamber;

[0018] Both the mounting part and the light source part are installed in the light-emitting chamber, and the light source part is positioned between the end of the mounting part and the light guide plate;

[0019] The diffuser and the brightness enhancement sheet are installed sequentially from bottom to top, and both the diffuser and the brightness enhancement sheet are configured such that one end abuts against the inner wall of the back plate and the other end is spaced apart from the other inner wall of the back plate, so as to reserve the light-emitting chamber.

[0020] The installation includes a shielding part and a contact part. The shielding part encloses the light source within the installation gap, while the contact part is initially kept in the first state to prevent the contact part from contacting the diffuser and the brightness enhancement sheet.

[0021] Install the LCD panel so that it covers the surface of the light guide plate, and the manufacturing process is complete.

[0022] The technical solution adopted in this invention can achieve the following beneficial effects:

[0023] 1. When the contact part is in the first state, it is separated from the diffuser and the brightness enhancement film. In this case, the installation of the diffuser and the brightness enhancement film is more convenient during the initial installation stage of the LED backlight, and the contact part does not affect the normal installation of the diffuser and the brightness enhancement film. When the entire LED backlight is installed and put into use, the temperature inside the entire back panel will rise to the preset temperature under the continuous light emission of the light source. At this time, the contact part will automatically switch from the first state to the second state, so that one end of the diffuser and the brightness enhancement film is contacted by the contact part. Since the other end of the diffuser and the brightness enhancement film is directly contacted on the inner wall of the back panel, the diffuser and the brightness enhancement film can be more stably placed in the back panel and are less likely to shift when both ends of the diffuser and the brightness enhancement film are contacted. This reduces the loss rate of the light source during transmission in the diffuser and the brightness enhancement film, and ultimately improves the brightness of the final display of the LCD panel.

[0024] 2. Because static electricity easily accumulates inside the backlight after it is powered on, it can cause varying degrees of damage to various components within the backlight, thus affecting the display brightness of the LCD panel. Therefore, to reduce the damage caused by static electricity, after the first and second sub-parts are respectively attached to the diffuser and brightness enhancement film, any static electricity present inside the diffuser and brightness enhancement film can be transferred to the grounding wire through the first and second conductive films. The grounding wire then discharges the static electricity, thereby further improving the lifespan of the backlight and ensuring that the brightness displayed by the LCD panel meets the expected effect.

[0025] 3. During the initial installation of the LED backlight, if the contact part is immediately placed against the ends of the diffuser and brightness enhancement film, it is highly likely that the diffuser and brightness enhancement film will warp due to excessive contact force. This will ultimately affect the overall use of the LED backlight, as the warped diffuser and brightness enhancement film will still be affected. The main reason for this problem is that, due to the small size of the LED backlight, the position of the contact part is difficult to control during the initial installation. This means that excessive contact force can easily occur during installation, causing the diffuser and brightness enhancement film to warp before it is even used. Therefore, through the manufacturing method of the present invention, the abutment portion does not initially abut against the diffuser and brightness enhancement sheet. Instead, it automatically abuts against them after being put into use, thus preventing warping. This is because after the LED backlight is installed, a liquid crystal panel is installed above the diffuser and brightness enhancement sheet. The liquid crystal panel restricts the diffuser and brightness enhancement sheet vertically, ensuring that the abutment portion abuts against the ends of the diffuser and brightness enhancement sheet after the LED backlight is installed. At this point, the diffuser and brightness enhancement sheet are less likely to warp. In summary, the manufacturing method of the present invention can reduce the possibility of warping of the diffuser and brightness enhancement sheet and improve their installation stability. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0028] Figure 2 This is a partial schematic diagram illustrating the contact portion in a first state according to an embodiment of this application;

[0029] Figure 3 Figure 2 Enlarged view of part A in the image;

[0030] Figure 4 This is a partial schematic diagram illustrating the contact portion in a second state according to an embodiment of this application;

[0031] Figure 5 This is a partially enlarged schematic diagram of an embodiment of this application, used to illustrate the contact portion in a second state.

[0032] In the picture:

[0033] 1. Backplate; 11. Light-emitting chamber; 111. Mounting gap; 12. Horizontal channel; 2. Light guide plate; 21. Rubber strip; 3. Diffuser sheet; 4. Brightness enhancement sheet; 5. LCD panel; 6. Light source unit; 7. Mounting unit; 71. Insertion channel; 72. Abutment cavity; 8. Shielding unit; 81. Shielding section; 82. Connecting section; 821. Insertion sub-unit; 8211. Receiving groove; 822. Snap-fit ​​sub-unit; 9. Abutment unit; 91. First sub-unit; 92. Second sub-unit; 10. Discharge unit; 101. Grounding wire; 102. First conductive film; 103. Second conductive film. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0035] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0036] In the field of high-performance hybrid liquid crystal display (LCD) technology, the combination of LCD technology with other display technologies has significantly improved display performance. Hybrid LCDs aim to provide higher brightness, color accuracy, contrast, and faster response times. Compared to traditional LCDs, they typically employ innovative backlight systems or display panel structures to optimize display effects. As a light-modulating device, an LCD does not emit light itself; it displays images or text by adjusting the light from a backlight source. Therefore, the performance of the backlight directly affects the visual effect of the display module. LCDs typically consist of multiple components, with the backlight located on the back of the LCD panel, including a light guide plate, diffuser, brightness enhancement film, and the LCD panel itself. The light source usually enters from one side of the light guide plate, is uniformly diffused by the diffuser, and then its intensity is enhanced by the brightness enhancement film before finally illuminating the LCD panel to display the image.

[0037] However, in existing technologies, backlight systems often suffer from issues where the LCD panel's brightness fails to meet expectations during practical applications. Through in-depth research, the inventors discovered that the root cause of this problem lies in the tendency of the diffuser and brightness enhancement plates in the backlight to shift during use. This shift prevents the light emitted by the light source from being effectively transmitted to the LCD panel, thus affecting display brightness and quality. Specifically, the shift of the diffuser and brightness enhancement plates can cause a deviation in the light propagation path, resulting in uneven light distribution on the LCD panel and causing display problems such as uneven brightness and color distortion. Furthermore, the light emitted by the light source itself can easily leak to the back of the LCD screen or other parts, preventing the backlight brightness from being fully transmitted to the light guide plate, further affecting the stability and consistency of the display effect.

[0038] The shortcomings of existing technologies mainly lie in two aspects: first, the displacement of the diffuser and brightness enhancement film, which prevents the brightness of the light source from being uniformly and effectively transmitted to the LCD panel; second, the leakage of light from the light source, leading to brightness loss and affecting the display effect of the LCD panel. These problems not only reduce the overall quality of the display but may also affect the competitiveness of LCD displays in high-performance display applications. Therefore, how to solve the problem of light efficiency loss caused by the displacement of the diffuser and brightness enhancement film, and how to effectively prevent light leakage from the light source, have become urgent technical challenges to be addressed in current LCD backlight technology.

[0039] Through in-depth analysis of the shortcomings of existing technologies, the inventors proposed an LED backlight for a high-performance hybrid liquid crystal display and its manufacturing method. The aim is to effectively avoid the displacement problems of diffuser and brightness enhancement films, while solving the problem of light leakage from the light source, thereby improving the brightness uniformity and display quality of the liquid crystal display.

[0040] The following is in conjunction with the appendix Figures 1 to 5 This application provides a detailed description of a high-performance hybrid liquid crystal display LED backlight and its manufacturing method through specific embodiments and application scenarios.

[0041] An LED backlight for a high-performance hybrid liquid crystal display, such as Figure 1 , Figure 2 As shown, the backlight includes a back plate 1, and a light guide plate 2, a diffuser 3, a brightness enhancement film 4, and a liquid crystal panel 5 are disposed inside the back plate 1 from bottom to top. For example, the length of the light guide plate 2 is less than the length of the back plate 1, while the lengths of the diffuser 3 and the brightness enhancement film 4 are less than the length of the light guide plate 2. Meanwhile, the length of the liquid crystal panel 5 is adapted to the length of the light guide plate 2 so as to facilitate covering the upper surface of the back plate 1.

[0042] In some implementations, combined with Figure 1 , Figure 2The backlight also includes a light source part 6, a mounting part 7, a shielding part 8, and a contacting part 9; wherein, a light-emitting chamber 11 is reserved in the back plate 1 on one side of the light guide plate 2, and the light source part 6 is installed in the light-emitting chamber 11. For example, the light source part 6 is configured as an LED light strip. The mounting part 7 is provided in the light-emitting chamber 11, and a mounting gap 111 is formed between the mounting part 7 and one end of the light guide plate 2 in the light-emitting chamber 11, and the light source part 6 is located in the mounting gap 111; for example, the mounting part 7 is configured as an insulating strip, the insulating strip is adhered to the inner sidewall of the back plate 1, and the insulating strip is spaced apart from the end of the light guide plate 2. It is worth noting that the insulating strip can be made of any material such as ceramic material, epoxy resin, polyvinyl chloride, polytetrafluoroethylene, or rigid polyethylene.

[0043] Meanwhile, the shielding part 8 is located between the mounting part 7 and the light guide plate 2, and above the mounting gap 111. Together with the mounting gap 111, it forms a space that encloses the light source part 6, so that the light emitted by the light source part 6 acts on the light guide plate 2. In this way, the light source part 6 can be enclosed by the shielding part 8 in combination with the mounting gap 111, so that most of the light emitted by the light source part 6 can be transmitted to the light guide plate 2. To a certain extent, it can effectively reduce the light leakage and loss of the light source part 6, thereby reducing the light loss transmitted from the light source part 6 to the light guide plate 2, and thus improving the final brightness displayed on the liquid crystal panel 5.

[0044] Furthermore, the contact portion 9 is provided on the shielding portion 8. The contact portion 9 has a first state and a second state, and can switch from the first state to the second state when the ambient temperature rises to a preset temperature. When the contact portion 9 is in the first state, it is spaced apart from both the diffuser 3 and the brightness enhancement sheet 4. When the contact portion 9 is in the second state, it abuts against the diffuser 3 and the brightness enhancement sheet 4 along the length of the back plate 1, so that the diffuser 3 and the brightness enhancement sheet 4 are confined to the back plate 1 by the dual constraints of the contact portion 9 and the sidewall of the back plate 1. For example, the preset temperature is configured as the ambient temperature after the light source unit 6 stably emits light after being powered on. For example, the internal temperature of an LED backlight during normal operation is usually between 60°C and 85°C. At this time, the state switching temperature of the contact part 9 is preset to 60°C. This way, after the backlight is put into use, the contact part 9 can automatically switch from the first state to the second state, making the diffuser 3 and the brightness enhancement sheet 4 more stable after being contacted by the contact part 9.

[0045] With this configuration, when the contact part 9 is in the first state, it is spaced apart from the diffuser 3 and the brightness enhancement film 4. In this case, the installation of the diffuser 3 and the brightness enhancement film 4 is more convenient during the initial installation stage of the LED backlight, avoiding the contact part 9 from affecting the normal installation of the diffuser 3 and the brightness enhancement film 4. When the entire LED backlight is installed and put into use, the temperature inside the entire back panel 1 will rise to the preset temperature under the continuous light emission of the light source 6. At this time, the contact part 9 will automatically switch from the first state to the second state, so that one end of the diffuser 3 and the brightness enhancement film 4 is contacted by the contact part 9. Since the other end of the diffuser 3 and the brightness enhancement film 4 is directly contacted on the inner wall of the back panel 1, the diffuser 3 and the brightness enhancement film 4 can be more stably placed in the back panel 1 without easily shifting when both ends of the diffuser 3 and the brightness enhancement film 4 are contacted. This reduces the loss rate of the light source during transmission within the diffuser 3 and the brightness enhancement film 4, and ultimately improves the final brightness of the LCD panel 5.

[0046] It is worth noting that during the initial installation of the LED backlight, if the abutment 9 is immediately placed against the ends of the diffuser 3 and the brightness enhancement film 4, it is highly likely that the diffuser 3 and the brightness enhancement film 4 will warp due to excessive abutment force from the abutment 9. This will ultimately affect the overall use of the LED backlight, as the diffuser 3 and the brightness enhancement film 4 will still be affected even after warping. The main reason for this problem is that, due to the small size of the LED backlight, the position of the abutment 9 is difficult to control during the initial installation. This means that excessive abutment force from the abutment 9 can easily occur during installation, causing the diffuser 3 and the brightness enhancement film 4 to warp even before they are put into use. If the contact part 9 is not initially in contact with the diffuser sheet 3 and the brightness enhancement sheet 4, but is instead in contact with them after the product is put into use, warping will not occur. This is because after the LED backlight is installed, an LCD panel 5 is installed above the diffuser sheet 3 and the brightness enhancement sheet 4. The LCD panel 5 restricts the diffuser sheet 3 and the brightness enhancement sheet 4 vertically, making it less likely for the diffuser sheet 3 and the brightness enhancement sheet 4 to warp after the LED backlight is installed and the contact part 9 contacts the ends of the diffuser sheet 3 and the brightness enhancement sheet 4. This arrangement can reduce the possibility of warping of the diffuser sheet 3 and the brightness enhancement sheet 4 and improve the installation stability of the diffuser sheet 3 and the brightness enhancement sheet 4.

[0047] In some implementations, such as Figure 1 , Figure 2As shown, the shielding part 8 includes a shielding section 81 and a connecting section 82. One end of the connecting section 82 is connected to the mounting part 7. The shielding section 81 is bent relative to the connecting section 82, and the end of the shielding section 81 away from the connecting section 82 is inclined downward and abuts against the upper surface of the light guide plate 2, so as to form a space enclosed by the mounting gap 111. In this way, most of the light emitted by the light source 6 can act on the light guide plate 2, thereby reducing the light loss rate of the light source 6.

[0048] For example, in combination Figure 2 , Figure 3 The connecting section 82 includes an insertion sub-part 821 and a snap-fit ​​sub-part 822. The snap-fit ​​sub-part 822 is provided on the insertion sub-part 821 at least once, and the snap-fit ​​sub-part 822 and the insertion sub-part 821 are elastically connected so that the snap-fit ​​sub-part 822 can tilt relative to the insertion sub-part 821. The included angle formed by the snap-fit ​​sub-part 822 tilting relative to the insertion sub-part 821 in its natural state is an acute angle. Furthermore, the mounting part 7 has a horizontally connected insertion channel 71 and a mating cavity 72. The height of the mating cavity 72 is greater than the height of the insertion channel 71. The height of the insertion channel 71 is adapted to the thickness of the insertion sub-part 821, and the insertion channel 71 is used for the insertion sub-part 821 to be inserted so that the snap-fit ​​sub-part 822 can be driven into the mating cavity 72.

[0049] Meanwhile, the side wall of the insertion part 821 has a receiving groove 8211 for the snap-fit ​​part 822 to be inserted into. During the process of the insertion part 821 driving the snap-fit ​​part 822 into the insertion channel 71, the snap-fit ​​part 822 is attached to the receiving groove 8211 under the restriction of the inner side wall of the insertion channel 71. After the insertion part 821 drives the snap-fit ​​part 822 into the abutting cavity 72, the snap-fit ​​part 822 automatically moves away from the receiving groove 8211 and abuts against the inner wall of the abutting cavity 72 under its own elasticity, so as to prevent part of the insertion part 821 from falling out of the abutting cavity 72.

[0050] With this configuration, when installing the shielding part 8, the connecting section 82 is directly aligned with the insertion channel 71 and then inserted horizontally. During this process, the snap-fit ​​part 822 is squeezed into the receiving groove 8211 by the restriction of the inner wall of the insertion channel 71. This allows the insertion part 821 and the snap-fit ​​part 822 to be inserted normally into the mating cavity 72 through the insertion channel 71. After entering, since the height of the mating cavity 72 is greater than the height of the insertion channel 71, and the snap-fit ​​part 822 will return to its initial state after being unrestricted by the insertion channel 71, that is, it will tilt relative to the insertion part 821 again. At this time, the end of the snap-fit ​​part 822 will abut against the inner wall of the mating cavity 72. In this way, the insertion part 821 is not easy to come out of the mating cavity 72. At the same time, under the abutment of the snap-fit ​​part 822, the part of the connecting section 82 located in the mating cavity 72 is not easy to bend, and the installation is relatively stable.

[0051] In some implementations, reference is made to Figure 2 , Figure 4 The abutting part 9 includes a first sub-part 91 and a second sub-part 92. Both the first sub-part 91 and the second sub-part 92 are inclinedly disposed at the end of the shielding section 81 away from the connecting section 82. When the abutting part 9 is in the second state, the first sub-part 91 abuts against the end wall of the brightness enhancement sheet 4, and the second sub-part 92 abuts against the end wall of the diffuser sheet 3.

[0052] For example, the abutting part 9 is configured as a structural component made of shape memory alloy material, and the abutting part 9 is configured to switch from a first state to a second state when the temperature is greater than a preset value; wherein, the first sub-part 91 is configured to deform and come into contact with the end wall of the brightness enhancement sheet 4 when the temperature is greater than the preset value.

[0053] The second sub-part 92 is configured to deform and come into contact with the end wall of the diffuser 3 when the temperature exceeds a preset value. It is worth noting that the initial state of the contact part 9 can be preset so that the first sub-part 91 and the second sub-part 92 can deform according to a preset value. For example, the internal temperature of an LED backlight during normal operation is typically between 60°C and 85°C. In this case, the state switching temperature of the contact part 9 is preset to 60°C, and the initial state is such that the first sub-part 91 and the second sub-part 92 are not attached to the brightness enhancement film 4 and the diffuser 3. This allows the contact part 9 to automatically switch from the first state to the second state after the backlight is put into use, making the diffuser 3 and the brightness enhancement film 4 more stable after being contacted by the contact part 9. For example, the shape memory alloy is a nickel-titanium alloy, and its deformation temperature is generally between 60°C and 100°C.

[0054] For example, the length of the first sub-part 91 is greater than the length of the second sub-part 92. During initial installation, both the first sub-part 91 and the second sub-part 92 form an angle with the blocking section 81, and the angle is an acute angle.

[0055] Based on this, shape memory alloy (SMA) is an alloy material that can change shape when heated or cooled and can recover its original shape under certain conditions. Therefore, when the abutment part 9 is configured to be made of shape memory alloy material, the following morphological changes will occur during use: Before this application is used, the initial state of the first sub-part 91 and the second sub-part 92 is that they are spaced apart from the brightness enhancement sheet 4 and the diffuser sheet 3, so that the abutment part 9 will not affect the initial installation of the brightness enhancement sheet 4 and the diffuser sheet 3. After being put into use, the temperature inside the entire backlight will gradually rise to between 60°C and 85°C after the light source part 6 is turned on. At this time, the shape memory alloy will deform under the influence of temperature, that is, the first sub-part 91 and the second sub-part 92 will rotate in a direction relatively away from the blocking section 81, so that the first sub-part 91 abuts against the end wall of the brightness enhancement sheet 4 and the second sub-part 92 abuts against the end wall of the diffuser sheet 3, thereby achieving further fixation of the diffuser sheet 3 and the brightness enhancement sheet 4. At the same time, it also has a better effect, that is, the diffuser 3 and the brightness enhancement sheet 4 are not easy to shift during the long-term use of the backlight, which improves the service life of the backlight.

[0056] For example, the shielding part 8 can be made of metal. Specifically, the shielding part 8 is a thin metal sheet, which allows the first sub-part 91 and the second sub-part 92 to be elastically connected relative to each other, that is, it has the ability to elastically deform, thereby achieving the above-mentioned effect.

[0057] In some implementations, such as Figure 2 , Figure 4 and Figure 5 As shown, a rubber strip 21 is provided on the upper surface of the light guide plate 2, and the intersection of the blocking section 81 and the abutting part 9 abuts against the upper surface of the rubber strip 21. For example, the rubber strip 21 is made of fluororubber, silicone rubber, or polyurethane rubber, and can withstand temperatures between 60°C and 85°C without easily being damaged. Meanwhile, the function of the rubber strip 21 is that, since the first sub-part 91 and the second sub-part 92 will be offset relative to the blocking section 81, the intersection of the first sub-part 91 and the blocking section 81, and the intersection of the second sub-part 92 and the blocking section 81, will undergo varying degrees of shape changes, which can easily cause wear on the surface of the light guide plate 2. Therefore, in order to avoid wear on the light guide plate 2 to a certain extent, a rubber strip 21 is provided at this location, so that the friction caused by the shape change acts on the rubber strip 21, thus preventing damage to the light guide plate 2 and improving its service life.

[0058] In some implementations, combined with Figure 1 , Figure 2 and Figure 4It also includes a discharge section 10, a portion of which is disposed on the shielding section 8 and the abutting section 9, and another portion extends to the outside of the back plate 1 and is used for electrical connection with the ground wire.

[0059] For example, the discharge section 10 includes a grounding wire 101, a first conductive film 102 and a second conductive film 103. The grounding wire 101 is disposed on the upper surface of the shielding section 81, and a transverse channel 12 is transversely passed through the mounting section 7 and the back plate 1 for the grounding wire 101 to pass through. The grounding wire 101 extends to the outside through the transverse channel 12 and is connected to the ground wire of the outside.

[0060] Meanwhile, a first conductive film 102 is disposed on the upper surface of the first sub-part 91, and a portion of the first conductive film 102 covers the end wall of the first sub-part 91 away from the shielding section 81, so that when the contact part 9 switches from the first state to the second state, the first conductive film 102 is attached to the end wall of the brightness enhancement film 4.

[0061] Furthermore, the second conductive film 103 is disposed on the upper surface of the second sub-part 92, and a portion of the second conductive film 103 covers the end wall of the second sub-part 92 away from the shielding section 81, so that when the contact part 9 switches from the first state to the second state, the second conductive film 103 adheres to the end wall of the diffuser sheet 3.

[0062] In some embodiments, both the first conductive film 102 and the second conductive film 103 are made of indium tin oxide. In other embodiments, the first conductive film 102 and the second conductive film 103 may also be made of other materials, such as metal films, graphene films, polymer conductive films, etc. Indium tin oxide is a transparent and conductive oxide widely used in displays and touch screens. It possesses both conductivity and transparency.

[0063] Because static electricity easily accumulates inside the backlight after it is powered on, it can cause varying degrees of damage to various components within the backlight, thus affecting the display brightness of the LCD panel 5. Therefore, to reduce the damage caused by static electricity, after the first sub-part 91 and the second sub-part 92 are respectively attached to the diffuser 3 and the brightness enhancement film 4, if static electricity exists inside the diffuser 3 and the brightness enhancement film 4, it can be transferred to the grounding wire 101 through the first conductive film 102 and the second conductive film 103. The grounding wire 101 then discharges the static electricity through the ground wire. This further improves the lifespan of the backlight and ensures that the brightness displayed by the LCD panel 5 meets the expected effect.

[0064] For example, the length of the first conductive film 102 is greater than the length of the first sub-part 91, and the length of the second conductive film 103 is greater than the length of the second sub-part 92. This allows the first conductive film 102 and the second conductive film 103 to have redundant segments when the first sub-part 91 and the second sub-part 92 are offset relative to the blocking segment 81, so that they will not be affected by the pulling and will not indirectly affect the deflection of the first sub-part 91 and the second sub-part 92.

[0065] It is worth noting that the appendix to this application Figures 1-5 The dimensions of each component are not actual dimensions, but are only used to explain the structure of this application. The actual dimensions can be adjusted according to the needs of on-site application.

[0066] This application also includes a method for manufacturing an LED backlight for a high-performance hybrid liquid crystal display, comprising the following steps:

[0067] Install the light guide plate 2 into the back plate 1, such that one end of the light guide plate 2 abuts against the inner side wall of the back plate 1 and the other end is spaced from the other inner side wall of the back plate 1, so as to reserve the light-emitting chamber 11.

[0068] Both the mounting part 7 and the light source part 6 are installed inside the light-emitting chamber 11, and the light source part 6 is positioned between the end of the mounting part 7 and the light guide plate 2.

[0069] Diffuser 3 and brightness enhancement sheet 4 are installed sequentially from bottom to top. Both diffuser 3 and brightness enhancement sheet 4 are configured such that one end abuts against the inner wall of the back plate 1 and the other end is spaced apart from the other inner wall of the back plate 1, so as to reserve the light-emitting chamber 11.

[0070] The shielding part 8 and the abutting part 9 are installed. The shielding part 8 encloses the light source part 6 in the installation gap 111, while the abutting part 9 is initially kept in the first state to avoid the abutting part 9 from contacting the diffuser 3 and the brightness enhancement sheet 4.

[0071] Install the LCD panel 5 so that it covers the surface of the light guide plate 2, and the manufacturing process is complete.

[0072] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0073] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0074] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An LED backlight for a high-performance hybrid liquid crystal display, comprising a back plate (1), wherein a light guide plate (2), a diffuser (3), a brightness enhancement sheet (4), and a liquid crystal panel (5) are disposed therein from bottom to top within the back plate (1), characterized in that, Also includes: The light source unit (6) has a light-emitting chamber (11) reserved on one side of the light guide plate (2) in the back plate (1), and the light source unit (6) is installed in the light-emitting chamber (11); The mounting part (7) is provided in the light-emitting chamber (11), and a mounting gap (111) is formed between the mounting part (7) and one end of the light guide plate (2) in the light-emitting chamber (11), and the light source part (6) is located in the mounting gap (111); The shielding part (8) is provided between the mounting part (7) and the light guide plate (2) and above the mounting gap (111). Together with the mounting gap (111), it forms a space that encloses the light source part (6) so that the light emitted by the light source part (6) acts on the light guide plate (2). A contact portion (9) is provided on the shielding portion (8). The contact portion (9) has a first state and a second state. When the ambient temperature rises to a preset temperature, the contact portion (9) can switch from the first state to the second state. The preset temperature is configured as the ambient temperature after the light source portion (6) of the LED backlight is powered on and emits light stably during normal operation. When the contact portion (9) is in the first state, the contact portion (9) is in a spaced-out state with the diffuser (3) and the brightness enhancement sheet (4). When the contact portion (9) is in the second state, the contact portion (9) abuts against the diffuser (3) and the brightness enhancement sheet (4) in the length direction of the back plate (1) so that the diffuser (3) and the brightness enhancement sheet (4) are confined within the back plate (1) under the dual constraints of the contact portion (9) and the side wall of the back plate (1).

2. The LED backlight for a high-performance hybrid liquid crystal display screen according to claim 1, characterized in that, The shielding part (8) includes a shielding section (81) and a connecting section (82). One end of the connecting section (82) is connected to the mounting part (7). The shielding section (81) is bent relative to the connecting section (82), and the end of the shielding section (81) away from the connecting section (82) is inclined downward and abuts against the upper surface of the light guide plate (2) so as to form a space that encloses the light source part (6) together with the mounting gap (111).

3. The LED backlight for a high-performance hybrid liquid crystal display screen according to claim 2, characterized in that, The connecting segment (82) includes an insertion sub-part (821) and a snap-fit ​​sub-part (822). The snap-fit ​​sub-part (822) is provided on the insertion sub-part (821) at least once, and the snap-fit ​​sub-part (822) and the insertion sub-part (821) are elastically connected so that the snap-fit ​​sub-part (822) can tilt relative to the insertion sub-part (821). The included angle formed by the snap-fit ​​sub-part (822) tilting relative to the insertion sub-part (821) in its natural state is an acute angle. The mounting part (7) is horizontally provided with an insertion channel (71) and a mating cavity (72). The height of the mating cavity (72) is greater than the height of the insertion channel (71). The height of the insertion channel (71) is adapted to the thickness of the insertion sub-part (821). The insertion channel (71) is used for the insertion sub-part (821) to be inserted, so as to drive the snap-fit ​​sub-part (822) into the mating cavity (72). The side wall of the insertion part (821) is provided with a receiving groove (8211) for the snap-fit ​​part (822) to be attached. During the process of the insertion part (821) driving the snap-fit ​​part (822) into the insertion channel (71), the snap-fit ​​part (822) is attached to the receiving groove (8211) under the restriction of the inner side wall of the insertion channel (71). After the insertion part (821) drives the snap-fit ​​part (822) into the abutment cavity (72), the snap-fit ​​part (822) automatically moves away from the receiving groove (8211) under its own elasticity and abuts against the inner wall of the abutment cavity (72) to prevent part of the insertion part (821) from falling out of the abutment cavity (72).

4. The LED backlight for a high-performance hybrid liquid crystal display screen according to claim 2, characterized in that, The abutting part (9) includes a first sub-part (91) and a second sub-part (92). The first sub-part (91) and the second sub-part (92) are both inclinedly disposed at one end of the shielding section (81) away from the connecting section (82). When the abutting part (9) is in the second state, the first sub-part (91) abuts against the end wall of the brightness enhancement sheet (4), and the second sub-part (92) abuts against the end wall of the diffuser sheet (3).

5. The LED backlight for a high-performance hybrid liquid crystal display screen according to claim 4, characterized in that, The contact portion (9) is configured as a structural component made of shape memory alloy material, and the contact portion (9) is configured to switch from a first state to a second state when the temperature is greater than a preset value; wherein, The first sub-part (91) is configured to deform toward the end wall of the brightness enhancement sheet (4) when the temperature is greater than a preset value; The second sub-part (92) is configured to deform toward the end wall of the diffuser (3) when the temperature is greater than a preset value.

6. The LED backlight for a high-performance hybrid liquid crystal display screen according to claim 4, characterized in that, The length of the first sub-part (91) is greater than the length of the second sub-part (92). During initial installation, both the first sub-part (91) and the second sub-part (92) form an angle with the shielding section (81), and the angle is an acute angle.

7. The LED backlight of a high-performance hybrid liquid crystal display screen according to any one of claims 4-6, characterized in that, The upper surface of the light guide plate (2) is provided with a rubber strip (21), and the intersection of the blocking section (81) and the abutting part (9) abuts against the upper surface of the rubber strip (21).

8. The LED backlight for a high-performance hybrid liquid crystal display screen according to claim 6, characterized in that, It also includes a discharge section (10), a portion of which is disposed on the shielding section (8) and the abutting section (9), and another portion extends to the outside of the back plate (1) and is used for electrical connection with the ground wire.

9. The LED backlight of a high-performance hybrid liquid crystal display screen according to claim 8, characterized in that, The discharge section (10) includes a grounding wire (101), a first conductive film (102) and a second conductive film (103). The grounding wire (101) is disposed on the upper surface of the shielding section (81), and a transverse channel (12) for the grounding wire (101) to pass through is transversely through the mounting section (7) and the back plate (1). The grounding wire (101) extends to the outside through the transverse channel (12) and is connected to the ground wire of the outside. The first conductive film (102) is disposed on the upper surface of the first sub-part (91), and a portion of the first conductive film (102) covers the end wall of the first sub-part (91) away from the shielding section (81), so that when the abutting part (9) switches from the first state to the second state, the first conductive film (102) is attached to the end wall of the brightness enhancement film (4). The second conductive film (103) is disposed on the upper surface of the second sub-part (92), and a portion of the second conductive film (103) covers the end wall of the second sub-part (92) away from the shielding section (81), so that when the abutment part (9) switches from the first state to the second state, the second conductive film (103) is attached to the end wall of the diffuser (3).

10. A method for manufacturing an LED backlight for a high-performance hybrid liquid crystal display screen, used to manufacture the LED backlight for the high-performance hybrid liquid crystal display screen according to any one of claims 1-9, characterized in that, Includes the following steps: Install the light guide plate (2) into the back plate (1), such that one end of the light guide plate (2) abuts against the inner wall of the back plate (1) and the other end is spaced from the other inner wall of the back plate (1) to reserve the light-emitting chamber (11). The mounting part (7) and the light source part (6) are both installed in the light-emitting chamber (11), and the light source part (6) is positioned between the end of the mounting part (7) and the light guide plate (2); The diffuser (3) and the brightening plate (4) are installed sequentially from bottom to top. Both the diffuser (3) and the brightening plate (4) are configured such that one end abuts against the inner wall of the back plate (1) and the other end is spaced apart from the other inner wall of the back plate (1) to reserve the light-emitting chamber (11). Install the shielding part (8) and the abutting part (9). The shielding part (8) encloses the light source part (6) in the installation gap (111), while the abutting part (9) is initially kept in the first state to avoid the abutting part (9) from contacting the diffuser (3) and the brightness enhancement sheet (4). Install the LCD panel (5) so that the LCD panel (5) covers the surface of the light guide plate (2), and the manufacturing is completed.

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