LED backlight source of high-performance mixed liquid crystal display screen and manufacturing method

Abstract

The invention discloses an LED backlight source of a high-performance mixed liquid crystal display screen and a manufacturing method, and relates to the technical field of high-performance mixed liquid crystal display screens, the backlight source comprises a back plate, a light guide plate, a diffusion sheet, a brightness enhancement sheet and a liquid crystal panel; a light-emitting chamber is arranged in the back plate, and the light source part is installed in the light-emitting chamber and fixed through an installation gap between the installation part and the light guide plate. A shielding part is arranged above the mounting gap, and the shielding part and the mounting gap jointly form a closed space, so that light of the light source part effectively acts on the light guide plate. An abutting part is further arranged in the back plate, and the abutting part can be switched from the first state to the second state when the environment temperature rises to the preset temperature. In the first state, the abutting portion is spaced from the diffusion sheet and the brightness enhancement sheet. And in the second state, the abutting part abuts against the diffusion sheet and the brightness enhancement sheet, and the diffusion sheet and the brightness enhancement sheet are fixed in the back plate through double limitation of the side wall of the back plate, so that the lighting effect of the backlight source is optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of high-performance hybrid liquid crystal display screens, and in particular to an LED backlight source of a high-performance hybrid liquid crystal display screen and a manufacturing method thereof. Background Art

[0002] High-Performance Hybrid LCD is a display that combines liquid crystal display (LCD) technology with other display technologies (such as OLED, quantum dots or backlight technology) to provide higher brightness, color accuracy, contrast and faster response speed. Compared with traditional LCD, hybrid LCD usually adopts innovative backlight system or display panel structure to improve the display effect. The backlight is a light source located behind the LCD, and its luminous effect will directly affect the visual effect of the LCD module. The LCD itself does not emit light. It displays graphics or characters as a result of its modulation of light and is widely used in various industries.

[0003] In the related technology, the backlight source is composed of a light guide plate, a diffuser, a brightening film and a liquid crystal panel stacked in sequence on the back panel. The light source shines in from one side of the light guide plate, is diffused by the diffuser, and then shines on the brightening film for brightness enhancement. Finally, the enhanced light is diffused from the brightening film to the entire liquid crystal panel.

[0004] After research, the inventors found that when the backlight source is in use, the brightness displayed on the liquid crystal panel often fails to achieve the expected effect. Summary of the invention

[0005] The invention discloses an LED backlight source of a high-performance hybrid liquid crystal display screen and a manufacturing method thereof, so as to solve the technical problem that the brightness of the backlight source in the related art cannot achieve the expected effect.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions: A high-performance hybrid liquid crystal display LED backlight source comprises a back plate, wherein a light guide plate, a diffusion sheet, a light enhancement sheet and a liquid crystal panel are covered from bottom to top in the back plate, and further comprises: a light source part, wherein a light emitting chamber is reserved in the back plate on one side of the light guide plate, and the light source part is installed in the light emitting chamber; a mounting part, which is arranged in the light emitting chamber, and a mounting gap is formed between the mounting part and one end of the light guide plate in the light emitting chamber, and the light source part is in the mounting gap; a shielding part, which is arranged between the mounting part and the light guide plate and is located above the mounting gap, and together with the mounting gap, forms a sealing part for the light source part; a space so that the bright light emitted by the light source portion acts on the light guide plate; a contact portion, arranged on the shielding portion, the contact portion has a first state and a second state, and the contact portion can be switched from the first state to the second state when the ambient temperature rises to a preset temperature; wherein, when the contact portion is in the first state, the contact portion is in a spaced state with the diffusion sheet and the brightness enhancement sheet respectively; when the contact portion is in the second state, the contact portion abuts against the diffusion sheet and the brightness enhancement sheet in the length direction of the back plate, so that the diffusion sheet and the brightness enhancement sheet are confined in the back plate under the dual restrictions of the contact portion and the side wall of the back plate.

[0007] Optionally, the shielding portion includes a shielding section and a connecting section, one end of the connecting section is connected to the mounting portion, the shielding section is bent relative to the connecting section, and one 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 enclosing the light source portion together with the mounting gap.

[0008] Optionally, the connecting section includes an insertion sub-section and a clamping sub-section, at least one of the clamping sub-sections is provided on the insertion sub-section, and the clamping sub-section and the insertion sub-section are elastically connected so that the clamping sub-section can be tilted and deformed relative to the insertion sub-section, and the angle formed by the clamping sub-section after tilting relative to the insertion sub-section in a natural state is an acute angle; a connected insertion channel and an abutment cavity are horizontally opened on the mounting portion, the height of the abutment 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-section, and the insertion The channel is used for inserting the insertion sub-part to drive the snap-on sub-part into the abutment cavity; a receiving groove for the snap-on sub-part to be attached is reserved on the side wall of the insertion sub-part, wherein, in the process of the insertion sub-part driving the snap-on sub-part to enter the insertion channel, the snap-on sub-part is attached to the receiving groove under the limiting action of the inner side wall of the insertion channel; after the insertion sub-part drives the snap-on sub-part into the abutment cavity, the snap-on sub-part automatically moves away from the receiving groove and abuts against the inner wall of the abutment cavity under the action of its own elasticity, so as to prevent part of the insertion sub-part from escaping from the abutment cavity.

[0009] Optionally, the abutment portion includes a first sub-portion and a second sub-portion, and the first sub-portion and the second sub-portion are both inclined at an end of the blocking section away from the connecting section. When the abutment 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 diffusion sheet.

[0010] Optionally, the abutment portion is configured as a structural part made of a memory alloy material, and the abutment 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-portion is configured to deform toward the end wall of the brightness enhancement sheet when the temperature is greater than a preset value; and the second sub-portion is configured to deform toward the end wall of the diffusion sheet when the temperature is greater than a preset value.

[0011] Optionally, the length of the first sub-portion is greater than the length of the second sub-portion, and during initial installation, both the first sub-portion and the second sub-portion form an acute angle with the shielding segment.

[0012] Optionally, a rubber strip is provided on the upper surface of the light guide plate, and the intersection of the shielding segment and the abutting portion abuts against the upper surface of the rubber strip.

[0013] Optionally, a discharge portion is further included, a portion of which is disposed on the shielding portion and the abutting portion, and another portion of which extends to the outside of the back plate and is used for being electrically connected to the ground wire.

[0014] Optionally, the discharge portion includes a grounding wire, a first conductive film and a second conductive film, wherein the grounding wire is arranged on the upper surface of the shielding segment, and a transverse channel for the grounding wire to pass through is laterally penetrated between the mounting portion and the back plate, and the grounding wire extends to the outside through the transverse channel and is connected to the outside ground wire; the first conductive film is arranged on the upper surface of the first sub-portion, and a portion of the first conductive film covers the end wall of the first sub-portion away from the shielding segment, so that when the abutting 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 sheet; the second conductive film is arranged on the upper surface of the second sub-portion, and a portion of the second conductive film covers the end wall of the second sub-portion away from the shielding segment, so that when the abutting portion switches from the first state to the second state, the second conductive film is in contact with the end wall of the diffusion sheet.

[0015] The present invention also discloses a method for manufacturing an LED backlight source for a high-performance hybrid liquid crystal display screen, which is used to manufacture the LED backlight source for a high-performance hybrid liquid crystal display screen described in any of the above schemes, and comprises the following steps: Install the light guide plate into the back plate, so 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 a light-emitting chamber; Install the mounting part and the light source part into the light-emitting chamber, and place the light source part between the mounting part and the end of the light guide plate; The diffusion sheet and the brightness enhancement sheet are sequentially installed from top to bottom, and the diffusion sheet and the brightness enhancement sheet are configured such that: one end of the diffusion sheet is in contact with 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 a light-emitting chamber; Install the shielding part and the abutting part, and seal the light source part in the installation gap through the shielding part, and keep the abutting part in the first state at the beginning to avoid the abutting part from contacting with the diffusion sheet and the brightness enhancement sheet; The liquid crystal panel is installed so that the liquid crystal panel covers the surface of the light guide plate, and the production is completed.

[0016] The technical solution adopted by the present invention can achieve the following beneficial effects: 1. When the abutting portion is in the first state, the abutting portion is in a spaced state with the diffusion sheet and the brightness enhancement sheet respectively. In this case, the diffusion sheet and the brightness enhancement sheet can be installed more conveniently in the initial installation stage of the LED backlight source, so as to avoid the abutting portion affecting the normal installation of the diffusion sheet and the brightness enhancement sheet. When the entire LED backlight source is installed and put into use, the temperature inside the entire back plate will rise to a preset temperature under the continuous light emission of the light source portion. At this time, the abutting portion will automatically switch from the first state to the second state, so that one end of the diffusion sheet and the brightness enhancement sheet is abutted by the abutting portion, and because the other ends of the diffusion sheet and the brightness enhancement sheet are directly abutted against the inner wall of the back plate, therefore, when both ends of the diffusion sheet and the brightness enhancement sheet are abutted, the diffusion sheet and the brightness enhancement sheet can be more stably located in the back plate and are not easily displaced, thereby reducing the loss rate of the light source when it is transmitted in the diffusion sheet and the brightness enhancement sheet, and finally improving the brightness of the final display of the liquid crystal panel; 2. After the backlight source is powered on, static electricity is easily generated inside it, which will cause different degrees of damage to various components in the backlight source, and further affect the display brightness of the liquid crystal panel. Therefore, in order to reduce the harm caused by static electricity, after the first sub-section and the second sub-section are respectively attached to the diffuser and the brightness enhancement sheet, if there is static electricity inside the diffuser and the brightness enhancement sheet, it can be transferred to the ground wire through the first conductive film and the second conductive film, and then discharged through the ground wire, which can further increase the service life of the backlight source and further ensure that the brightness displayed by the liquid crystal panel reaches the expected effect; 3. In the initial installation stage of the LED backlight source, if the abutment part is abutted against the ends of the diffuser and the light-enhancing sheet at the beginning, it is very likely that the diffuser and the light-enhancing sheet will be warped by the excessive abutment force of the abutment part, which will eventually affect the use of the entire LED backlight source, because the diffuser and the light-enhancing sheet will still be affected after warping. The main reason for the above problem is that due to the small size of the LED backlight source, the position of the abutment part is difficult to control when it is first installed, that is, it is easy to have excessive abutment force during the installation process, which causes the diffuser and the light-enhancing sheet to warp before they are used. Therefore, through the manufacturing method of the present invention, the abutting portion does not abut against the diffuser and the brightness enhancement sheet at the beginning, but automatically abuts against the diffuser and the brightness enhancement sheet after being put into use, so that warping will not occur, because after the LED backlight source is installed, a liquid crystal panel is installed above the diffuser and the brightness enhancement sheet, and the liquid crystal panel will restrict the diffuser and the brightness enhancement sheet in the vertical direction, so that after the LED backlight source is installed, the abutting portion abuts against the end of the diffuser and the brightness enhancement sheet, and at this time, the diffuser and the brightness enhancement sheet are not prone to warping. In summary, through the manufacturing method of the present invention, the possibility of warping of the diffuser and the brightness enhancement sheet can be reduced, while improving the installation stability of the diffuser and the brightness enhancement sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 is a partial schematic diagram of an embodiment of the present application for showing that the abutting portion is in a first state; Figure 3 Figure 2 A magnified view of part A in FIG. Figure 4 is a partial schematic diagram of an embodiment of the present application for showing that the abutting portion is in a second state; Figure 5 It is a partially enlarged schematic diagram of an embodiment of the present application for showing that the abutting portion is in the second state.

[0019] In the figure: 1. back plate; 11. light-emitting chamber; 111. installation gap; 12. transverse channel; 2. light guide plate; 21. rubber strip; 3. diffusion sheet; 4. brightness enhancement sheet; 5. liquid crystal panel; 6. light source part; 7. installation part; 71. insertion channel; 72. abutment cavity; 8. shielding part; 81. shielding section; 82. connecting section; 821. insertion sub-part; 8211. accommodation groove; 822. snap-on sub-part; 9. abutment part; 91. first sub-part; 92. second sub-part; 10. discharge part; 101. grounding wire; 102. first conductive film; 103. second conductive film. DETAILED DESCRIPTION

[0020] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0021] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0022] In the field of high-performance hybrid LCD technology, the display effect has been significantly improved with the combination of LCD technology and other display technologies. Hybrid LCDs are designed to provide higher brightness, color accuracy, contrast, and faster response speed. Compared with traditional LCDs, they usually use innovative backlight systems or display panel structures to optimize the display effect. As a device that modulates light, the LCD does not emit light itself. It displays images or text by adjusting the light from the light source behind it. Therefore, the performance of the backlight directly affects the visual effect of the display module. LCDs are usually composed of multiple components, in which the backlight source is located on the back of the LCD panel, including a light guide plate, a diffuser, a brightening film, and a liquid crystal panel. The light source usually shines in from one side of the light guide plate, and the light is evenly diffused by the diffuser. After the light intensity is enhanced by the brightening film, the enhanced light is finally irradiated onto the liquid crystal panel to display the image.

[0023] However, in the prior art, the backlight system often encounters the problem that the display brightness of the liquid crystal panel does not achieve the expected effect during actual application. After in-depth research, the inventors found that the root cause of this problem is that the diffuser and brightening sheet of the backlight source are prone to displacement during use. This displacement will cause the light emitted by the light source to be unable to be effectively transmitted to the liquid crystal panel, thereby affecting the display brightness and display quality. Specifically, the displacement of the diffuser and brightening sheet may cause the propagation path of the light to shift, resulting in the light not being evenly distributed on the liquid crystal panel, resulting in display problems such as uneven brightness and color distortion. In addition, the bright light emitted by the light source itself is also prone to leak to the back or other parts of the liquid crystal display, causing the brightness of the backlight source to be unable to be fully transmitted to the light guide plate, further affecting the stability and consistency of the display effect.

[0024] The shortcomings of the existing technology are mainly concentrated in two aspects: one is the displacement problem of the diffuser and the brightness enhancement sheet, which makes it impossible to evenly and effectively transmit the brightness of the light source to the liquid crystal panel; the other is the leakage problem of the light source, which leads to brightness loss and affects the display effect of the liquid crystal panel. Such problems not only reduce the overall quality of the display effect, but also may affect the competitiveness of liquid crystal displays in high-performance display applications. Therefore, how to solve the problem of light efficiency loss caused by the displacement of the diffuser and the brightness enhancement sheet, and how to effectively prevent the leakage of the light source, have become technical problems that need to be solved in the current liquid crystal display backlight technology.

[0025] Through in-depth analysis of the defects of the prior art, the inventor proposed an LED backlight source and manufacturing method for a high-performance hybrid LCD display, aiming to effectively avoid the displacement problem of the diffuser and the brightening sheet, while solving the problem of light leakage from the light source, thereby improving the brightness uniformity and display quality of the LCD display.

[0026] The following is combined with Figures 1 to 5 , through specific embodiments and application scenarios, the LED backlight source and manufacturing method of a high-performance hybrid liquid crystal display provided by the present application are described in detail.

[0027] A high performance hybrid LCD display LED backlight source, such as Figure 1 , Figure 2 As shown, the backlight source includes a back panel 1, and a light guide plate 2, a diffuser 3, a brightening plate 4 and a liquid crystal panel 5 are covered on the back panel 1 from bottom to top; illustratively, the length of the light guide plate 2 is smaller than the length of the back panel 1, while the lengths of the diffuser 3 and the brightening plate 4 are smaller than the length of the light guide plate 2. At the same time, the length of the liquid crystal panel 5 is adapted to the length of the light guide plate 2 to facilitate covering the upper surface of the back panel 1.

[0028] In some embodiments, in combination Figure 1 , Figure 2, the backlight source also includes a light source unit 6, a mounting unit 7, a shielding unit 8 and abutting unit 9; wherein, a light-emitting chamber 11 is reserved on one side of the light guide plate 2 in the back panel 1, and the light source unit 6 is installed in the light-emitting chamber 11. Exemplarily, the light source unit 6 is configured as an LED light strip. The mounting unit 7 is disposed in the light-emitting chamber 11, and an installation gap 111 is formed between the mounting unit 7 and one end of the light guide plate 2 in the light-emitting chamber 11, and the light source unit 6 is in the installation gap 111; exemplarily, the mounting unit 7 is configured as an insulating strip, the insulating strip is bonded to the inner side wall of the back panel 1, and the insulating strip and the end of the light guide plate 2 are spaced apart. It is worth noting that the insulating strip can be made of any material such as ceramic material, epoxy resin, polyvinyl chloride, polytetrafluoroethylene, rigid polyethylene, etc.

[0029] At the same time, the shielding portion 8 is disposed between the mounting portion 7 and the light guide plate 2 and is located above the mounting gap 111, and together with the mounting gap 111, forms a space enclosing the light source portion 6, so that the bright light emitted by the light source portion 6 acts on the light guide plate 2. In this way, the light source portion 6 can be enclosed by the shielding portion 8 in combination with the mounting gap 111, so that most of the bright light emitted by the light source portion 6 can be transmitted to the light guide plate 2, which can effectively reduce the light leakage and loss of the light source portion 6 to a certain extent, so that the loss of the bright light transmitted from the light source portion 6 to the light guide plate 2 is reduced, thereby improving the brightness of the final display on the liquid crystal panel 5.

[0030] Furthermore, the abutting portion 9 is provided on the shielding portion 8, and the abutting portion 9 has a first state and a second state, and the abutting portion 9 can be switched from the first state to the second state when the ambient temperature rises to a preset temperature; wherein, when the abutting portion 9 is in the first state, the abutting portion 9 is in a spaced state with the diffusion sheet 3 and the brightness enhancement sheet 4 respectively; when the abutting portion 9 is in the second state, the abutting portion 9 abuts with the diffusion sheet 3 and the brightness enhancement sheet 4 in the length direction of the back plate 1, so that the diffusion sheet 3 and the brightness enhancement sheet 4 are confined to the back plate 1 under the dual restrictions of the abutting portion 9 and the side wall of the back plate 1. Exemplarily, the preset temperature is configured as the ambient temperature after the light source unit 6 is powered on and stably emits bright light. For example, the internal temperature of an LED backlight source during normal operation is usually between 60°C and 85°C. At this time, the state switching temperature of the abutment portion 9 is preset to 60°. In this way, after the backlight source is put into use, the abutment portion 9 can automatically switch from the first state to the second state, so that the diffuser 3 and the brightness enhancement sheet 4 are more stable after being abutted by the abutment portion 9.

[0031] After being set in this way, when the abutting portion 9 is in the first state, the abutting portion 9 is in a spaced state with the diffuser 3 and the brightness enhancement sheet 4 respectively. In this case, the installation of the diffuser 3 and the brightness enhancement sheet 4 can be made more convenient in the initial installation stage of the LED backlight source, so as to avoid the abutting portion 9 affecting the normal installation of the diffuser 3 and the brightness enhancement sheet 4. When the entire LED backlight source is installed and put into use, under the continuous light emission of the light source portion 6, the temperature inside the entire back panel 1 will rise to a preset temperature. At this time, the abutting portion 9 will automatically switch from the first state to the second state, so that one end of the diffuser 3 and the brightness enhancement sheet 4 is abutted by the abutting portion 9, and because the other ends of the diffuser 3 and the brightness enhancement sheet 4 are directly abutted against the inner wall of the back panel 1, therefore, when both ends of the diffuser 3 and the brightness enhancement sheet 4 are abutted, the diffuser 3 and the brightness enhancement sheet 4 can be more stably located in the back panel 1 and are not easily displaced, thereby reducing the loss rate of the light source when it is transmitted in the diffuser 3 and the brightness enhancement sheet 4, and finally improving the brightness of the final display of the liquid crystal panel 5.

[0032] It is worth noting that, in the initial installation stage of the LED backlight source, if the abutment portion 9 is abutted against the ends of the diffuser 3 and the brightness enhancement sheet 4 at the beginning, it is very likely that the diffuser 3 and the brightness enhancement sheet 4 will be warped due to excessive abutment force of the abutment portion 9, which will eventually affect the use of the entire LED backlight source, because the diffuser 3 and the brightness enhancement sheet 4 will still be affected after warping. The main reason for the above problem is that due to the small size of the LED backlight source, the position of the abutment portion 9 is difficult to control when it is first installed, that is, it is easy for the abutment force of the abutment portion 9 to be too large during the installation process, causing the diffuser 3 and the brightness enhancement sheet 4 to warp before they are used. If the abutting portion 9 is not abutted against the diffuser 3 and the brightness enhancement sheet 4 at the beginning, but is abutted against the diffuser 3 and the brightness enhancement sheet 4 after being put into use, warping will not occur, because after the LED backlight source is installed, a liquid crystal panel 5 is installed above the diffuser 3 and the brightness enhancement sheet 4, and the liquid crystal panel 5 will restrict the diffuser 3 and the brightness enhancement sheet 4 in the vertical direction, so that after the LED backlight source is installed, when the abutting portion 9 abuts against the ends of the diffuser 3 and the brightness enhancement sheet 4, the diffuser 3 and the brightness enhancement sheet 4 are not prone to warping. Such a setting can reduce the possibility of warping of the diffuser 3 and the brightness enhancement sheet 4 and improve the installation stability of the diffuser 3 and the brightness enhancement sheet 4.

[0033] In some embodiments, Figure 1 , Figure 2As shown, the shielding portion 8 includes a shielding section 81 and a connecting section 82, one end of the connecting section 82 is connected to the mounting portion 7, the shielding section 81 is bent relative to the connecting section 82, and one end of the shielding section 81 away from the connecting section 82 is tilted downward and abuts against the upper plate surface of the light guide plate 2, so as to form a space enclosing the light source portion 6 together with the mounting gap 111. In this way, most of the bright light emitted by the light source portion 6 can act on the light guide plate 2, so as to reduce the bright light loss rate of the light source portion 6.

[0034] Exemplary, combined Figure 2 , Figure 3 The connecting section 82 includes an inserting sub-section 821 and a snap-on sub-section 822. The snap-on sub-section 822 is provided with at least one group on the inserting sub-section 821, and the snap-on sub-section 822 is elastically connected to the inserting sub-section 821 so that the snap-on sub-section 822 can be tilted and deformed relative to the inserting sub-section 821. The angle formed by the snap-on sub-section 822 tilting relative to the inserting sub-section 821 in a natural state is an acute angle; further, a connected insertion channel 71 and abutment cavity 72 are horizontally opened on the mounting portion 7. The height of the abutment 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-section 821, and the insertion channel 71 is used for the insertion of the insertion sub-section 821 to drive the snap-on sub-section 822 to enter the abutment cavity 72.

[0035] At the same time, a receiving groove 8211 is reserved on the side wall of the insertion sub-part 821 for the snap-on sub-part 822 to be attached thereto, wherein, in the process of the insertion sub-part 821 driving the snap-on sub-part 822 to enter the insertion channel 71, the snap-on sub-part 822 is attached to the receiving groove 8211 under the limiting action of the inner side wall of the insertion channel 71; after the insertion sub-part 821 drives the snap-on sub-part 822 to enter the abutment cavity 72, the snap-on sub-part 822 automatically moves away from the receiving groove 8211 under the action of its own elasticity and abuts against the inner wall of the abutment cavity 72, so as to prevent part of the insertion sub-part 821 from escaping from the abutment cavity 72.

[0036] With such arrangement, when installing the shielding portion 8, the connecting section 82 is directly aligned with the insertion channel 71 and then inserted horizontally. During this process, the snap-fit ​​sub-section 822 is restricted by the inner wall of the insertion channel 71 and is squeezed into the accommodating groove 8211, so that the insertion sub-section 821 and the snap-fit ​​sub-section 822 can be normally inserted into the abutting cavity 72 through the insertion channel 71; after entering, since the height of the abutting cavity 72 is greater than the height of the insertion channel 71, and the snap-fit ​​sub-section 822 is not restricted by the insertion channel 71, it will reset to the initial state, that is, it will be tilted relative to the insertion sub-section 821 again. At this time, the end of the snap-fit ​​sub-section 822 will abut against the inner wall of the abutting cavity 72, so that the insertion sub-section 821 is not easy to fall out of the abutting cavity 72. At the same time, under the abutting action of the snap-fit ​​sub-section 822, the part of the connecting section 82 located in the abutting cavity 72 is not easy to be deflected, and the installation is relatively stable.

[0037] In some embodiments, reference Figure 2 , Figure 4 The abutting portion 9 includes a first sub-portion 91 and a second sub-portion 92. The first sub-portion 91 and the second sub-portion 92 are both inclined at an end of the blocking section 81 away from the connecting section 82. When the abutting portion 9 is in the second state, the first sub-portion 91 abuts against the end wall of the brightness enhancement sheet 4, and the second sub-portion 92 abuts against the end wall of the diffusion sheet 3.

[0038] Exemplarily, the abutting portion 9 is configured as a structural member made of a memory alloy material, and the abutting 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-portion 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-section 92 is configured to deform toward the end wall of the diffuser 3 when the temperature is greater than a preset value. It is worth noting that the initial shape of the abutment portion 9 can be preset in the early stage so that the first sub-section 91 and the second sub-section 92 can be deformed according to the preset. For example, the internal temperature of the LED backlight source during normal operation is usually between 60°C and 85°C. At this time, the state switching temperature of the abutment portion 9 is preset to 60°, and the initial shape is that the first sub-section 91 and the second sub-section 92 are not attached to the brightness enhancement sheet 4 and the diffuser 3. In this way, after the backlight source is put into use, the abutment portion 9 can automatically switch from the first state to the second state, so that the diffuser 3 and the brightness enhancement sheet 4 are more stable after being abutted by the abutment portion 9. Exemplarily, the memory alloy uses nickel-titanium alloy, and the deformation temperature is generally between 60°C and 100°C.

[0039] Exemplarily, the length of the first sub-portion 91 is greater than the length of the second sub-portion 92 . During initial installation, both the first sub-portion 91 and the second sub-portion 92 form an acute angle with the shielding segment 81 .

[0040] On this basis, a memory alloy (also known as a shape memory alloy, Shape Memory Alloy, SMA) is an alloy material that can change shape when heated or cooled, and can return to its original shape under certain conditions. Therefore, when the abutting portion 9 is configured to be made of a memory alloy material, the following morphological changes will occur during use: before the present application is used, the initial state of the first sub-portion 91 and the second sub-portion 92 is to be spaced from the brightness enhancement sheet 4 and the diffusion sheet 3, so that the abutting portion 9 will not affect the initial installation of the brightness enhancement sheet 4 and the diffusion sheet 3. After being put into use, after the light source portion 6 is started, the temperature inside the entire backlight source will gradually rise to between 60°C and 85°C. At this time, the memory alloy will be deformed under the influence of temperature, that is, the first sub-portion 91 and the second sub-portion 92 will rotate in a direction relatively away from the shielding segment 81, so that the first sub-portion 91 abuts against the end wall of the brightness enhancement sheet 4, and the second sub-portion 92 abuts against the end wall of the diffusion sheet 3, thereby further fixing the diffusion sheet 3 and the brightness enhancement sheet 4. At the same time, it also has a better effect, that is, when the backlight source is used for a long time, the diffusion sheet 3 and the brightness enhancement sheet 4 are not easy to shift, which indirectly increases the service life of the backlight source.

[0041] Exemplarily, the shielding portion 8 may be made of metal. Specifically, the shielding portion 8 is a metal sheet, so that the first sub-portion 91 and the second sub-portion 92 can be relatively elastically connected, that is, have the ability of elastic deformation, thereby achieving the above effect.

[0042] In some embodiments, 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 shielding segment 81 and the abutting portion 9 abuts against the upper surface of the rubber strip 21. Exemplarily, the rubber strip 21 is made of fluororubber, silicone rubber, or polyurethane rubber, and can withstand temperatures between 60°C and 85°C without being easily damaged. At the same time, the role of the rubber strip 21 is that: since the first sub-section 91 and the second sub-section 92 will be offset relative to the shielding segment 81, the intersection of the first sub-section 91 and the shielding segment 81, and the intersection of the second sub-section 92 and the shielding segment 81 will undergo different degrees of morphological changes, and the morphological changes will easily cause wear on the surface of the light guide plate 2. Therefore, in order to avoid wear of the light guide plate 2 to a certain extent, a rubber strip 21 is provided at this position so that the friction caused by the morphological change acts on the rubber strip 21, so that it is not easy to damage the light guide plate 2, thereby improving the service life of the light guide plate 2.

[0043] In some embodiments, in combination Figure 1 , Figure 2 and Figure 4, and also includes a discharge portion 10, a portion of which is disposed on the shielding portion 8 and the abutting portion 9, and another portion of which extends to the outside of the back plate 1 and is used to be electrically connected to the ground wire.

[0044] Exemplarily, the discharge portion 10 includes a grounding wire 101, a first conductive film 102 and a second conductive film 103, wherein the grounding wire 101 is arranged on the upper surface of the shielding segment 81, and a transverse channel 12 for the grounding wire 101 to pass through is horizontally penetrated on the mounting portion 7 and the back plate 1, and the grounding wire 101 extends to the outside through the transverse channel 12 and is connected to the outside ground wire.

[0045] At the same time, the first conductive film 102 is arranged on the upper surface of the first sub-portion 91, and part of the first conductive film 102 covers the end wall of the first sub-portion 91 away from the shielding section 81, so that when the abutting portion 9 switches from the first state to the second state, the first conductive film 102 is in contact with the end wall of the brightness enhancement film 4.

[0046] Furthermore, the second conductive film 103 is disposed on the upper surface of the second sub-portion 92, and a portion of the second conductive film 103 covers the end wall of the second sub-portion 92 away from the shielding section 81, so that when the abutting portion 9 switches from the first state to the second state, the second conductive film 103 is in contact with the end wall of the diffuser 3.

[0047] In some embodiments, the first conductive film 102 and the second conductive film 103 are both 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 display screens and touch screens. It has both conductivity and transparency.

[0048] Since static electricity is easily generated inside the backlight source after it is powered on, the static electricity will cause different degrees of damage to various components in the backlight source, and further affect the display brightness of the liquid crystal panel 5. Therefore, in order to reduce the harm caused by static electricity, after the first sub-section 91 and the second sub-section 92 are respectively attached to the diffusion sheet 3 and the brightness enhancement sheet 4, if there is static electricity inside the diffusion sheet 3 and the brightness enhancement sheet 4, it can be transferred to the grounding wire 101 through the first conductive film 102 and the second conductive film 103, and the grounding wire 101 is then discharged through the ground wire, so that the service life of the backlight source can be further improved, and at the same time, the brightness displayed by the liquid crystal panel 5 can be further guaranteed to achieve the expected effect.

[0049] Exemplarily, the length of the first conductive film 102 is greater than the length of the first sub-portion 91, and the length of the second conductive film 103 is greater than the length of the second sub-portion 92. In this way, when the first sub-portion 91 and the second sub-portion 92 are offset relative to the blocking segment 81, the first conductive film 102 and the second conductive film 103 have redundant segments and will not be affected by pulling, nor will they indirectly affect the deflection of the first sub-portion 91 and the second sub-portion 92.

[0050] It is worth noting that the appendix to this application Figure 1~Figure 5 The sizes of the various components are not actual sizes and are only used to explain the structure of this application. The actual sizes can be adjusted according to on-site application requirements.

[0051] The present application also includes a method for manufacturing an LED backlight source for a high-performance hybrid liquid crystal display, comprising the following steps: Install the light guide plate 2 into the back plate 1, and make one end of the light guide plate 2 abut against the inner side wall of the back plate 1, and the other end of the light guide plate 2 is spaced from the other inner side wall of the back plate 1, so as to reserve a light-emitting chamber 11; Install the mounting portion 7 and the light source portion 6 into the light-emitting chamber 11, and place the light source portion 6 between the mounting portion 7 and the end of the light guide plate 2; The diffuser 3 and the brightness enhancement sheet 4 are sequentially installed from top to bottom, and the diffuser 3 and the brightness enhancement sheet 4 are configured as follows: one end of the diffuser 3 and the brightness enhancement sheet 4 are in contact with 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 a light-emitting chamber 11; Install the shielding portion 8 and the abutting portion 9, and seal the light source portion 6 in the installation gap 111 through the shielding portion 8, while keeping the abutting portion 9 in the first state at the beginning to avoid the abutting portion 9 from contacting the diffusion sheet 3 and the brightness enhancement sheet 4; The liquid crystal panel 5 is installed so that the liquid crystal panel 5 covers the surface of the light guide plate 2, and the manufacturing is completed.

[0052] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0053] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that 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.

[0054] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An LED backlight source for a high-performance hybrid liquid crystal display screen, comprising a back plate (1), wherein the back plate (1) is covered with a light guide plate (2), a diffusion sheet (3), a brightness enhancement sheet (4) and a liquid crystal panel (5) from bottom to top, characterized in that: Also includes: A light source unit (6), a light-emitting chamber (11) being reserved on one side of the light guide plate (2) in the back plate (1), and the light source unit (6) being installed in the light-emitting chamber (11); A mounting portion (7) is disposed in the light-emitting chamber (11), and a mounting gap (111) is formed between the mounting portion (7) and one end of the light guide plate (2) in the light-emitting chamber (11), and the light source portion (6) is located in the mounting gap (111); a shielding portion (8) disposed between the mounting portion (7) and the light guide plate (2) and located above the mounting gap (111), and together with the mounting gap (111) forming a space enclosing the light source portion (6), so that the bright light emitted by the light source portion (6) acts on the light guide plate (2); A contact portion (9) is provided on the shielding portion (8), the contact portion (9) having a first state and a second state, and the contact portion (9) can be switched from the first state to the second state when the ambient temperature rises to a preset temperature; wherein, when the contact portion (9) is in the first state, the contact portion (9) is in a spaced state with the diffusion sheet (3) and the brightness enhancement sheet (4) respectively; and when the contact portion (9) is in the second state, the contact portion (9) abuts against the diffusion sheet (3) and the brightness enhancement sheet (4) in the length direction of the back plate (1), so that the diffusion sheet (3) and the brightness enhancement sheet (4) are confined within the back plate (1) under the dual restriction of the contact portion (9) and the side wall of the back plate (1).

2. The LED backlight source of a high-performance hybrid liquid crystal display according to claim 1, characterized in that: The shielding portion (8) comprises a shielding section (81) and a connecting section (82), one end of the connecting section (82) being connected to the mounting portion (7), the shielding section (81) being bent relative to the connecting section (82), and one end of the shielding section (81) away from the connecting section (82) being inclined downwardly and abutting against the upper plate surface of the light guide plate (2), so as to form a space enclosing the light source portion (6) together with the mounting gap (111).

3. The LED backlight source of a high-performance hybrid liquid crystal display according to claim 2, characterized in that: The connecting section (82) comprises an inserting sub-section (821) and a snap-fitting sub-section (822), wherein at least one snap-fitting sub-section (822) is provided on the inserting sub-section (821), and the snap-fitting sub-section (822) is elastically connected to the inserting sub-section (821), so that the snap-fitting sub-section (822) can be tilted and deformed relative to the inserting sub-section (821), and the angle formed by the snap-fitting sub-section (822) tilting relative to the inserting sub-section (821) in a natural state is an acute angle; The mounting portion (7) is horizontally provided with an insertion channel (71) and an abutment cavity (72) which are connected to each other. The height of the abutment 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-portion (821). The insertion channel (71) is used for the insertion of the insertion sub-portion (821) to drive the clamping sub-portion (822) to enter the abutment cavity (72). A receiving groove (8211) is reserved on the side wall of the insertion sub-part (821) for the snap-on sub-part (822) to be attached thereto, wherein, in the process of the insertion sub-part (821) driving the snap-on sub-part (822) to enter the insertion channel (71), the snap-on sub-part (822) is attached to the receiving groove (8211) under the limiting action of the inner side wall of the insertion channel (71); after the insertion sub-part (821) drives the snap-on sub-part (822) to enter the abutting cavity (72), the snap-on sub-part (822) automatically moves away from the receiving groove (8211) under the action of its own elasticity and abuts against the inner wall of the abutting cavity (72), so as to prevent part of the insertion sub-part (821) from escaping from the abutting cavity (72).

4. The LED backlight source of a high-performance hybrid liquid crystal display according to claim 2, characterized in that: The abutting portion (9) comprises a first sub-portion (91) and a second sub-portion (92); the first sub-portion (91) and the second sub-portion (92) are both arranged obliquely at one end of the shielding section (81) away from the connecting section (82); when the abutting portion (9) is in a second state, the first sub-portion (91) abuts against an end wall of the brightness enhancement sheet (4), and the second sub-portion (92) abuts against an end wall of the diffusion sheet (3).

5. The LED backlight source of a high-performance hybrid liquid crystal display according to claim 4, characterized in that: The abutment portion (9) is configured as a structural member made of a memory alloy material, and the abutment portion (9) is configured such that when the temperature is greater than a preset value, the abutment portion (9) switches from a first state to a second state; wherein: The first sub-portion (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-portion (92) is configured to deform towards the end wall of the diffusion sheet (3) when the temperature is greater than a preset value.

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

7. A high-performance hybrid liquid crystal display LED backlight source according to any one of claims 4 to 6, characterized in that: A rubber strip (21) is provided on the upper surface of the light guide plate (2), and the intersection of the shielding section (81) and the abutment portion (9) abuts against the upper surface of the rubber strip (21).

8. The LED backlight source of a high-performance hybrid liquid crystal display according to claim 6, characterized in that: It also comprises a discharge portion (10), a part of which is arranged on the shielding portion (8) and the abutting portion (9), and another part of which extends to the outside of the back plate (1) and is used for being electrically connected to a ground wire.

9. The LED backlight source of a high-performance hybrid liquid crystal display according to claim 8, characterized in that: The discharge portion (10) comprises a grounding wire (101), a first conductive film (102) and a second conductive film (103), wherein the grounding wire (101) is arranged on the upper surface of the shielding section (81), and a transverse channel (12) for the grounding wire (101) to pass through is transversely penetrated on the mounting portion (7) and the back plate (1), and the grounding wire (101) extends to the outside through the transverse channel (12) and is connected to the grounding wire of the outside; The first conductive film (102) is arranged on the upper surface of the first sub-portion (91), and a portion of the first conductive film (102) covers an end wall of the first sub-portion (91) away from the shielding section (81), so that when the abutting portion (9) is switched from the first state to the second state, the first conductive film (102) is in contact with the end wall of the brightness enhancement sheet (4); The second conductive film (103) is arranged on the upper surface of the second sub-portion (92), and a portion of the second conductive film (103) covers the end wall of the second sub-portion (92) away from the shielding section (81), so that when the abutting portion (9) is switched from the first state to the second state, the second conductive film (103) is in contact with the end wall of the diffusion sheet (3).

10. A method for manufacturing an LED backlight source for a high-performance hybrid liquid crystal display, used for manufacturing the LED backlight source for a high-performance hybrid liquid crystal display according to any one of claims 1 to 9, characterized in that: The following steps are involved: Installing the light guide plate (2) into the back plate (1) so 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 apart from the other inner side wall of the back plate (1), thereby reserving a light-emitting chamber (11); The mounting portion (7) and the light source portion (6) are both mounted in the light-emitting chamber (11), and the light source portion (6) is positioned between the mounting portion (7) and the end of the light guide plate (2); The diffusion sheet (3) and the brightness enhancement sheet (4) are sequentially installed from top to bottom, and the diffusion sheet (3) and the brightness enhancement sheet (4) are configured such that: one end of the diffusion sheet (3) 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 a light-emitting chamber (11); Installing the shielding portion (8) and the abutting portion (9), and enclosing the light source portion (6) in the installation gap (111) via the shielding portion (8), while allowing the abutting portion (9) to be initially maintained in the first state, thereby preventing the abutting portion (9) from abutting against the diffusion sheet (3) and the brightness enhancement sheet (4); The liquid crystal panel (5) is installed so that the liquid crystal panel (5) covers the surface of the light guide plate (2), and the manufacturing is completed.

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