Liquid crystal display device

Abstract

This application provides a liquid crystal display device, which includes a liquid crystal screen, a flexible circuit board, and a fixing member. The liquid crystal screen includes a first polarizer disposed on the display surface of the liquid crystal screen. The flexible circuit board is connected to the first edge of the liquid crystal screen and is used to provide display driving signals to the liquid crystal screen. The fixing member is located on the back side of the liquid crystal screen, and the back side of the liquid crystal screen is connected to the fixing member. The first polarizer forms an extension at least on the first edge of the liquid crystal screen. The extension extends to the side of the flexible circuit board facing the display surface to block the flexible circuit board. Thus, the flexible circuit board can be hidden without a front shell, and the blocking structure such as a front shell is not required, reducing the obstruction of the liquid crystal screen and even achieving a full-screen effect.

Description

Technical Field

[0001] This application belongs to the field of display devices, and more specifically, relates to a liquid crystal display device. Background Technology

[0002] Liquid crystal displays (LCDs) are display devices that adjust light transmission by controlling the alignment of liquid crystal molecules to display images. They are widely used in various electronic devices such as mobile phones, computers, and televisions due to their low power consumption, high color fidelity, and mature manufacturing processes. However, current LCD devices generally suffer from the problem of significant screen obstruction. Utility Model Content

[0003] The purpose of this application is to provide a liquid crystal display device to solve the technical problem that liquid crystal display devices in the prior art generally have a large amount of screen obstruction.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a liquid crystal display device, the liquid crystal display device comprising: A liquid crystal display (LCD); the LCD includes a first polarizer disposed on the display surface of the LCD. Flexible circuit board; The flexible circuit board is connected to the first edge of the LCD screen and is used to provide display driving signals to the LCD screen; The fastener is located on the back side of the LCD screen, and the back of the LCD screen is connected to the fastener. The first polarizer forms an extension at least at the first edge of the liquid crystal screen, and the extension extends to the side of the flexible circuit board facing the display surface to block the flexible circuit board.

[0005] Optionally, the liquid crystal display device further includes a support member disposed on the side of the extension away from the display surface.

[0006] Optionally, the color of the support member is the same as the color of the display surface of the LCD screen when it is not in display mode.

[0007] Optionally, the support component can be made of flexible adhesive, plastic, rubber, or silicone.

[0008] Optionally, the fastener includes a first mid-frame member and a mounting member, the mounting member being connected to the first mid-frame member, and the back of the LCD screen being connected to the mounting member.

[0009] Alternatively, the mounting components may be made of rubber, plastic, silicone, or metal.

[0010] Optionally, the back of the LCD screen and the mounting component are connected by a flexible connector.

[0011] Optionally, the liquid crystal display device further includes a second mid-frame member, which is disposed on the side of the extension away from the liquid crystal screen, and there is a first gap between the second mid-frame member and the extension, and the second mid-frame member is connected to the mounting member.

[0012] Optionally, the liquid crystal display device further includes a shielding member, which is disposed on the side of the second middle frame member facing the extension, and the shielding member is located on the side of the extension away from the display surface, and the position of the shielding member is opposite to the first gap, so as to shield the first gap.

[0013] Optionally, the second middle frame member has a shielding portion on the side facing the extension, and the shielding portion is located on the side of the extension away from the display surface, and the position of the shielding portion is opposite to the first gap, so as to shield the first gap.

[0014] Optionally, the liquid crystal display device is a liquid crystal television, and the first edge is at least one of the top edge, bottom edge, or side edge of the liquid crystal screen of the liquid crystal television.

[0015] The beneficial effects of the liquid crystal display device provided in this application are as follows: Compared with the prior art, the liquid crystal display device in the embodiments of this application utilizes the polarizing layer, which is an essential component of the liquid crystal screen, to form an extension portion on the edge where the flexible circuit board is provided. The extension portion extends to the side of the flexible circuit board facing the display surface to block the flexible circuit board, thereby hiding the flexible circuit board. It is not necessary to set a front shell or other blocking structures, reducing the obstruction of the liquid crystal screen and even achieving a full-screen effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional schematic diagram of the liquid crystal screen in an embodiment of this application; Figure 2 This is a schematic diagram of a traditional LCD TV. Figure 3 for Figure 2 Enlarged view of point I in the middle; Figure 4 This is a schematic diagram of a liquid crystal display device in one embodiment of this application; Figure 5 for Figure 4 AA section view in the middle; Figure 6 As one embodiment of this application Figure 5 Enlarged view of section II in the image; Figure 7 for Figure 4 Enlarged view of point III in the image; Figure 8 This is a schematic diagram of the shielding part in an embodiment of this application; Figure 9 This is a schematic diagram of a liquid crystal display device according to another embodiment of this application; Figure 10 This is a schematic diagram of a liquid crystal display device in another embodiment of this application.

[0018] The following are the labeling elements in the figure: LCD screen 1; backlight module 11; second polarizer 12; second glass substrate 13; liquid crystal layer 14; color filter 15; first glass substrate 16; first polarizer 17; extension 171; first edge 101; front shell 2; flexible circuit board 3; main board 4; support member 5; first middle frame member 61; second middle frame member 62; shielding part 621; first gap 63; mounting member 7; flexible connector 8; shielding member 9. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] Liquid crystal displays (LCDs) are widely used in various electronic devices such as mobile phones, computers, and televisions due to their advantages of clear image quality, moderate power consumption, and compatibility with various sizes. LCDs primarily display images by controlling the alignment of liquid crystal molecules to regulate light transmission.

[0024] Please see Figure 1 Taking the LCD screen 1, a common component in LCD TVs, as an example, the component furthest from the user is the backlight module 11, which provides the light source for the LCD TV. Since the liquid crystal itself does not emit light, large-screen TVs require the backlight module 11 to output uniform and sufficient white light to ensure consistent brightness across all areas of the screen. The backlight module 11 includes an LED array, a light guide plate, a diffusion film, and a brightness enhancement film. The LED array has two layouts: edge-lit and direct-lit. The edge-lit layout is more suitable for ultra-thin TVs, while the direct-lit layout provides more uniform brightness. The light guide plate converts the point light emitted by the LEDs into surface light. The diffusion film softens the light and prevents glare on the screen. The brightness enhancement film improves light utilization. These components together provide a stable foundation for subsequent light control.

[0025] The second polarizer 12 is located on the side of the backlight module 11 closest to the display surface. The second polarizer 12 is responsible for filtering light. The second polarizer 12 can filter the stray white light emitted by the backlight module 11 into linearly polarized light vibrating in a single direction. For large-screen TVs, the second polarizer 12 needs to ensure that the polarization direction remains uniform over a large area to avoid uneven brightness or color in some parts of the screen, thus laying the foundation for the liquid crystal layer 14 to regulate the light.

[0026] The second polarizer 12 is located near the display surface on a second glass substrate 13, which serves as the carrier for signal control. The second glass substrate 13 is made of transparent glass and has a large number of finely etched TFT thin-film transistors (TFTs), each corresponding to a micro-switch of a pixel on the screen. In large-size screens such as 4K TVs, the density of TFTs needs to match the screen resolution, approximately one million transistors per square meter. Their function is to receive electrical signals from external driving circuits, precisely control the voltage changes in the corresponding pixel area, and provide instructions for the alignment of liquid crystal molecules.

[0027] The second glass substrate 13 has a liquid crystal layer 14 on the side closest to the display surface, which regulates light. The liquid crystal layer 14 is composed of countless rod-shaped liquid crystal molecules, with a thickness of only a few micrometers. Large-size screens require uniform thickness of the liquid crystal layer 14 to prevent display deviations. Liquid crystal molecules have the characteristic of changing their alignment direction when energized. In the unenergized state, the molecules are neatly aligned in a specific direction, allowing linearly polarized light from the second polarizer 12 to pass through. When energized, the alignment direction of the molecules twists with the voltage change, thereby changing the polarization direction of the passing light, thus allowing or blocking the light. This process causes the pixels to produce brightness changes.

[0028] On the side of the liquid crystal layer 14 closest to the display surface is a color filter 15, which allows the screen to display colors. The color filter 15 divides each pixel into three sub-pixels according to the red, green, and blue primary colors. Large-screen televisions need to ensure the accuracy of the three primary color filtering to avoid color crosstalk. After light passes through the liquid crystal layer 14, it enters the color filter 15. Different sub-pixel filters only allow light of their corresponding color to pass through; for example, the red sub-pixel only allows red light to pass through. By adjusting the brightness ratio of the three sub-pixels, various different colors can be mixed to meet the needs of television displaying color images.

[0029] The side of the color filter 15 closest to the display surface is a first glass substrate 16, which assists in stabilizing the voltage and supports the structure. The structure of the first glass substrate 16 is similar to that of the second glass substrate 13, with a common electrode etched inside. This common electrode forms a stable electric field with the TFT thin-film transistors of the second glass substrate 13. In large-size screens, the first glass substrate 16 needs to be precisely aligned with the second glass substrate 13 to ensure that the electric field can act uniformly on the entire liquid crystal layer 14, avoiding local liquid crystal molecule modulation failure and ensuring consistent display across all areas of the screen.

[0030] The first polarizer 17 is located on the side of the first glass substrate 16 closest to the display surface. The first polarizer 17 is the final barrier for light output, and its outer side is the display surface. The polarization direction of the first polarizer 17 is perpendicular to that of the second polarizer 12. Light controlled by the liquid crystal layer 14 can pass through the first polarizer 17 and reach the display surface if its polarization direction is twisted by 90 degrees, forming bright pixels. If the polarization direction is not twisted, it will be blocked by the first polarizer 17, forming dark pixels. The first polarizer 17 of a large-size television needs to have high light transmittance to ensure sufficient screen brightness, while also ensuring that the polarization effect remains uniform over a large area to avoid a darker display at the screen edges.

[0031] The display principle of LCD screen 1 is as follows: First, the external driving circuit of the TV, such as the motherboard 4, generates corresponding display driving signals according to the content being played, such as videos and pictures. These signals are transmitted to the TFT thin-film transistors on the second glass substrate 13 via flexible circuit boards 3. Large-size TVs are usually equipped with multiple flexible circuit boards 3, which are distributed along the edge of the screen to ensure that the signals can be quickly transmitted to all areas of the screen. After receiving the signal, each TFT thin-film transistor adjusts the voltage of the corresponding pixel area according to the instructions, converting the instructions for brightness, darkness, and color into voltage changes, and then transmitting the voltage changes to the liquid crystal layer 14.

[0032] Secondly, the electric field formed by the second glass substrate 13 and the first glass substrate 16 adjusts the alignment of the liquid crystal molecules according to the voltage changes of the TFT thin-film transistors. When bright pixels need to be displayed, the voltage controls the liquid crystal molecules to twist 90 degrees, causing the polarization direction of the linearly polarized light transmitted from the second polarizer 12 to twist synchronously. At this time, the polarization direction of the light is consistent with the polarization direction of the first polarizer 17. When dark pixels need to be displayed, the voltage controls the liquid crystal molecules not to twist, and the polarization direction of the light remains unchanged. At this time, the polarization direction of the light is perpendicular to the polarization direction of the first polarizer 17. Through the synchronous control of countless TFT thin-film transistors, the large-size screen achieves precise control of the light of all pixels on the screen.

[0033] The light controlled by the liquid crystal layer 14 enters the color filter 15 and is decomposed into the three primary colors of red, green, and blue. The driving circuit adjusts the voltage of the three sub-pixels, which essentially controls the degree of twisting of the liquid crystal molecules, thereby changing the amount of light transmitted and ultimately altering the brightness ratio of the three primary colors. For example, increasing the brightness of the red sub-pixel and decreasing the brightness of the green and blue sub-pixels can produce a reddish hue. In this way, the desired color for the pixel is mixed. After passing through the first polarizer 17, the light carrying color information reaches the display surface. At this point, the light already possesses brightness and color information, allowing the user to directly observe the pixels on the display surface.

[0034] Millions of pixels on LCD screen 1 simultaneously perform the aforementioned light control and color mixing processes. For example, a 4K TV has 3840×2160, which equals 8.2944 million pixels. Each pixel displays corresponding brightness and color according to the driving signal. Countless pixels are arranged and combined according to specific rules to form a complete color image on the screen. At the same time, the TV refreshes the pixels at a specific frequency, commonly 60Hz or 120Hz, which means refreshing 60 or 120 times per second. This allows static images to switch continuously, forming dynamic video, which users can then watch TV programs, movies, and other content on the display.

[0035] As can be seen from the display principle of the LCD screen 1 described above, the first polarizer 17 is an essential structure of the LCD screen 1. It can perform the final filtering of the light controlled by the liquid crystal layer 14. Only light whose polarization direction is twisted by 90 degrees by the liquid crystal molecules can pass through the first polarizer 17 to reach the display surface and form bright pixels; light that is not twisted will be blocked by it to form dark pixels. This is the key to the screen presenting clear brightness and darkness contrast. If the first polarizer 17 is missing, the light passing through the liquid crystal layer 14 and the color filter 15 will be output in a messy manner, and it will be impossible to form a clear difference in pixel brightness and darkness, and the screen will not be able to display a normal image.

[0036] Furthermore, as can be seen from the above principles, the LCD screen 1 requires a flexible circuit board 3 to transmit signals. The flexible circuit board 3 is typically connected to the edge of the LCD screen 1. To shield and protect the flexible circuit board 3, most current LCD display devices have a front shell 2, a mesh cover, or other components along the edge of the flexible circuit board 3 on the LCD screen 1. However, these components inevitably obstruct a portion of the LCD screen 1. Figure 2 and Figure 3 For example, the figure shows a typical LCD TV, which has a front cover 2 at the bottom edge of the LCD screen 1 to cover the flexible circuit board 3 and other structures. In some other LCD display devices, a similar structure as the front cover 2 may also be provided at the top edge or side edge of the LCD screen 1.

[0037] like Figure 3 As shown, when these front shell 2 and other structures partially obscure the LCD screen 1, the LCD screen 1 cannot be fully displayed on the front of the LCD display device, thus failing to achieve a full-screen effect.

[0038] To address the aforementioned problems, this application provides a liquid crystal display device. Please refer to [link to relevant documentation]. Figure 4 , Figure 5 , Figure 6 and Figure 7 The liquid crystal display device includes: LCD screen 1; LCD screen 1 includes a first polarizer 17 disposed on the display surface of LCD screen 1; Flexible circuit board 3; Flexible circuit board 3 is connected to the first edge 101 of LCD screen 1 and is used to provide display driving signals for LCD screen 1. The fastener is located on the back side of the LCD screen 1, and the back of the LCD screen 1 is connected to the fastener. The first polarizer 17 forms an extension 171 at least at the first edge 101 of the liquid crystal screen 1. The extension 171 extends to the side of the flexible circuit board 3 facing the display surface to block the flexible circuit board 3.

[0039] The liquid crystal screen 1 is the core carrier for displaying images in the display device. It contains a multi-layered structure, including the first polarizer 17 (which is the focus of this discussion), a second polarizer 12, a glass substrate, a liquid crystal layer 14, and a color filter 15. The first polarizer 17 is located on the display surface of the liquid crystal screen 1, which is the side where the user directly observes the image. Its main function is to perform a final filtering on the light after it has been regulated by the liquid crystal layer 14, determining whether the light can be output to the display surface, thereby forming bright or dark pixels.

[0040] Its flexible circuit board 3 is a key component connecting the external motherboard 4 and the LCD screen 1, specifically connected to the first edge 101 of the LCD screen 1. The flexible circuit board 3 stably transmits the display driving signals generated by the external circuit to the driving circuit and TFT thin film transistor inside the LCD screen 1, providing precise signal support for the LCD screen 1 and ensuring that each pixel can realize the on / off of light and color presentation according to signal requirements. It is the signal bridge for the LCD screen 1 to realize image display.

[0041] The fastener is located on the back side of the LCD screen 1 and is directly connected to the back of the LCD screen 1. Its main function is to provide structural support for the LCD screen 1, stably fix the LCD screen 1 inside the device, and prevent the LCD screen 1 from being displaced or damaged due to external vibration, collision or other factors. At the same time, it can also help maintain the stability of each layer of the LCD screen 1 structure, ensuring that each layer of components is always in the correct relative position during the display process, without affecting the normal transmission and control of light.

[0042] An external motherboard 4 with a driving circuit generates display driving signals corresponding to the image. These signals are transmitted to the liquid crystal screen 1 via a flexible circuit board 3. Since the flexible circuit board 3 is connected to the first edge 101 of the liquid crystal screen 1, the signals can be quickly transmitted to the driving circuit inside the screen and then distributed to each TFT thin-film transistor. After receiving the signal, the TFT thin-film transistor changes the voltage of the corresponding area according to the signal instruction. The voltage change acts on the liquid crystal molecules in the liquid crystal layer 14, causing the alignment direction of the liquid crystal molecules to twist.

[0043] Meanwhile, the fixing components on the back of the LCD screen 1 maintain the overall stability of the screen structure, ensuring that the positions of each component, such as the liquid crystal layer 14, glass substrate, and polarizing layer, are fixed and do not interfere with light transmission. The white light emitted by the backlight module 11 is first filtered into linearly polarized light in a single direction by the second polarizer 12, and then passes through the second glass substrate 13 and the liquid crystal layer 14. At this time, the liquid crystal molecules twist due to voltage changes, which changes the direction of the polarized light. Subsequently, the light enters the color filter 15 and is filtered into red, green, and blue primary colors, and finally reaches the first polarizer 17. The first polarizer 17 determines whether light passes through based on whether the polarization direction of the light is consistent with its own polarization direction. The light that passes through forms bright pixels, and the light that does not pass through forms dark pixels. A large number of pixels combine to present a complete image on the display surface.

[0044] The flexible circuit board 3 is connected to the first edge 101 of the LCD screen 1 and needs to transmit driving signals to the screen. Its structure cannot be completely hidden behind the screen, and some areas will inevitably be exposed from the display surface. Without proper handling, these areas will be directly visible to the user. The extension 171 extends from the first polarizer 17 to the side of the flexible circuit board 3 facing the display surface, effectively utilizing the characteristic of the first polarizer 17 being located on the display surface to physically shield the flexible circuit board 3. Since the first polarizer 17 is an indispensable component in the screen display process, the presence of the extension 171 does not increase the thickness or complexity of the device. Unlike traditional solutions, it does not require a wide bezel or additional shielding structure specifically designed to shield the flexible circuit board 3. Without damaging the original structure, it minimizes the non-display area at the edge of the display surface, significantly improving the screen-to-body ratio and providing a structural foundation for a full-screen design. Figure 7 As shown, this LCD display device has achieved a full-screen effect.

[0045] It should be noted that although this embodiment can achieve an unobstructed screen, maximizing the screen-to-body ratio and providing a full-screen experience, it does not mean that the liquid crystal display device in this embodiment cannot have a front shell 2 or a mesh cover. When there are special requirements, such as the inclusion of buttons, speakers, or other components, a front shell 2 or a mesh cover can also be provided. For example, a lower front shell, a side front shell, a lower mesh cover, or a side mesh cover can be provided.

[0046] Please see Figure 6 In some embodiments of this application, the liquid crystal display device further includes a support member 5, which is disposed on the side of the extension 171 away from the display surface.

[0047] The support member 5 is disposed on the side of the extension 171 of the first polarizer 17 facing away from the display surface. The extension 171 itself extends from the first polarizer 17 on the display surface of the liquid crystal screen 1 to the side of the flexible circuit board 3 facing the display surface, and is used to shield the flexible circuit board 3. This means that the support member 5 is located on the back of the extension 171, with one side in contact with the extension 171 and the other side corresponding to the area where the flexible circuit board 3 or the fixing member is located, forming a reverse support structure for the extension 171.

[0048] The support member 5 effectively compensates for the structural weakness of the extension 171. The first polarizer 17 is a thin-film component. Its extension 171, extending from the main body of the LCD screen 1 to the flexible circuit board 3 area, is far from the support structure of the main screen body. It is thin and lacks rigidity, making it prone to deformation, wrinkling, or even breakage due to external force or vibration during device assembly, transportation, or daily use, thus affecting its shielding effect on the flexible circuit board 3. The support member 5, located on the side of the extension 171 away from the display surface, provides uniform support, stably fixing the extension 171 in a preset position, preventing displacement or shape changes, ensuring the extension 171 always adheres to the side of the flexible circuit board 3 facing the display surface, maintaining the stability of the shielding structure, and reducing the impact of deformation of the extension 171 on the overall polarization function of the first polarizer 17, thus ensuring the light filtering effect at the edge of the display surface.

[0049] The support member 5 protects both the extension 171 and the flexible circuit board 3. Firstly, located on the back of the extension 171, the support member 5 prevents external dust and impurities from directly contacting the back of the extension 171, avoiding any impact on its light transmittance and polarization performance. Simultaneously, when the device is subjected to a slight impact from the back, the support member 5 acts as a buffer, reducing the direct impact force on the extension 171 and lowering the probability of damage. Secondly, the support member 5 protects a localized area of ​​the flexible circuit board 3. Although the flexible circuit board 3 possesses a certain degree of flexibility, during long-term use, the area where it connects to the LCD screen 1 is prone to problems such as circuit aging and breakage due to repeated bending or stress concentration. By supporting the extension 171, the support member 5 indirectly restricts the movement of the flexible circuit board 3 in this area, reducing the frequency of shaking and bending, lowering the risk of signal transmission failure, and ensuring stable transmission of display drive signals.

[0050] In some embodiments of this application, the color of the support member 5 is the same as the color of the display surface of the liquid crystal screen 1 when it is not in the display state.

[0051] The support member 5 is located on the side of the first polarizer 17 extension 171 facing away from the display surface, while the first polarizer 17 extension 171 covers the side of the flexible circuit board 3 facing the display surface. This means that although the support member 5 is not directly exposed in front of the display surface, it may still be observed by the user through visual reflection or edge gaps in certain scenarios. The unified color design is precisely to eliminate this potential visual abruptness. After the color is unified, the support member 5 will blend into the non-display color tone of the display surface. When the user observes the screen, it is difficult to distinguish the transition boundary between the support member 5 and the display surface. Especially in large-size devices such as LCD TVs, this can further enhance the borderless full-screen visual experience and avoid the interference of edge structures on the overall visual immersion.

[0052] In some embodiments of this application, the support member 5 is made of flexible adhesive, plastic, rubber, or silicone. The support member 5 is located on the side of the extension 171 of the first polarizer 17 that faces away from the display surface, and is surrounded by components such as the liquid crystal screen 1 and the flexible circuit board 3. The installation space is relatively compact and has a certain curvature or irregular contour.

[0053] Flexible adhesives, rubber, and silicone possess a certain degree of elasticity and cushioning capacity. When the display device is subjected to slight vibrations or external impacts, they can absorb some of the impact force, reducing the direct effect of external forces on the extension 171 of the first polarizer 17 and the flexible circuit board 3, thus lowering the risk of deformation of the extension 171 and damage to the circuitry of the flexible circuit board 3. Although plastic materials have weaker cushioning properties, they possess good rigidity, providing stable support for the extension 171 and preventing it from sagging or wrinkling due to long-term use. They also prevent dust and impurities from entering the gap between the extension 171 and the flexible circuit board 3, maintaining component cleanliness. Furthermore, these materials all possess good chemical stability, are not prone to reacting with other components inside the display device, and can maintain their performance over a long period, ensuring the stable protection and support effect of the support component 5.

[0054] Please see Figure 6 In some embodiments of this application, the fastener includes a first mid-frame member 61 and a mounting member 7, the mounting member 7 being connected to the first mid-frame member 61, and the back of the LCD screen 1 being connected to the mounting member 7.

[0055] As a rigid frame, the first mid-frame component 61, if directly connected to the back of the screen, is prone to localized stress concentration due to mismatch in the contact surface, which may damage the lower glass substrate or affect the internal layer structure. The mounting component 7, however, can be designed to fit the shape of the back of the screen, for example, by using locally flexible or hollowed-out designs to avoid protrusions on the back. The shape of the back of the screen includes the flatness of the lower glass substrate and the distribution of circuitry. The mounting component 7 can transform the rigid support force of the first mid-frame component 61 into uniform planar support, transferring it to the back of the screen. This ensures the stability of the screen's position within the device and protects internal precision components from compression, making it particularly suitable for the uniform support requirements of large-size screens such as LCD TVs.

[0056] In some embodiments of this application, the mounting component 7 is made of rubber, plastic, silicone, or metal.

[0057] From the perspective of compatibility with rubber and silicone materials, these flexible materials can enhance the cushioning protection and fitting capabilities of the mounting component 7. Rubber and silicone possess excellent elasticity and flexibility. When mounting component 7 uses these materials, it can better conform to the shape of the back of the LCD screen 1. Even if there are minor protrusions or uneven areas on the back of the screen, the flexible material can achieve a tight fit through slight deformation, avoiding uneven support due to gaps in the contact surface. Simultaneously, the elasticity allows mounting component 7 to absorb impact when the device is vibrated, reducing the direct transmission of the rigid support force of the first mid-frame component 61 to the back of the screen, thus lowering the risk of damage to the lower glass substrate and internal precision components such as the liquid crystal layer 14 and color filter 15 due to vibration. Furthermore, the good insulation and wear resistance of rubber and silicone can prevent friction or conductive interference between mounting component 7 and the circuitry on the back of the screen, indirectly protecting the signal transmission stability of the flexible circuit board 3. This is particularly suitable for small and medium-sized LCD display devices with high cushioning protection requirements, such as some LCD monitors, or scenarios with complex back-side screen structures.

[0058] From the perspective of adaptability, plastic materials combine a certain degree of rigidity with processing flexibility, balancing support stability and design diversity. The rigidity of plastic lies between that of flexible materials and metal, providing stable support for the back of the screen to prevent sagging due to its own weight, while avoiding the adhesion problems caused by excessive rigidity, unlike metal. Simultaneously, plastic is easy to process and readily moldable. Depending on the back shape of different screen sizes, such as the glass substrate size and circuit distribution, mounting components 7 with cutouts and grooves can be easily manufactured. This allows for reserving space for the extended circuitry of the flexible circuit board 3, or avoiding protruding components on the back of the screen. Furthermore, plastic is lower in cost and lighter in weight, making it suitable for mass production. It can reduce the overall production cost and weight of the device while ensuring functionality, especially suitable for large-size devices like LCD TVs that require lightweighting and cost control. Additionally, the surface of plastic is easy to color-process, allowing the color to be adjusted to match the display surface color when the screen is not in use, enhancing the overall aesthetic appeal.

[0059] From the perspective of metal materials, such as aluminum profiles and stamped sheet metal, these rigid materials can improve the support strength and structural stability of the mounting component 7, making it suitable for large-size or high-load scenarios. Aluminum profiles have excellent rigidity and resistance to deformation, while stamped sheet metal can be processed into precise structural shapes. When the mounting component 7 uses these metal materials, it can provide stronger support for the back of the LCD screen 1. Especially for large-size screens such as LCD TVs, which are quite heavy, the metal mounting component 7 can effectively prevent deformation of the mounting component 7 due to insufficient support during long-term use, ensuring that the screen position remains stable. At the same time, the high flatness and controllable dimensional accuracy of the metal material can achieve precise docking with the first middle frame component 61 and the back of the screen, reducing assembly deviations. Aluminum profiles also have good heat dissipation. If there are localized heat-generating components on the back of the screen, the metal mounting component 7 can assist in heat dissipation, preventing heat accumulation from affecting screen performance. These materials are more suitable for large-size LCD display devices with high requirements for support strength, or for scenarios with complex operating environments, such as those that may be subject to certain external impacts.

[0060] Please see Figure 6 In some embodiments of this application, the back of the liquid crystal screen 1 and the mounting member 7 are connected by a flexible connector 8.

[0061] The flexible connector 8 fills the tiny gaps between the back of the LCD screen 1 and the mounting component 7, ensuring a stable connection. Regardless of whether the mounting component 7 is made of rubber, plastic, silicone, or metal, the back of the LCD screen 1 may have minor bumps or unevenness caused by the circuit layout. Rigid connections are prone to loosening due to misalignment of the contact surfaces. Flexible connectors 8, such as double-sided foam adhesive, possess a certain thickness and flexibility, allowing them to conform to the contact surfaces of the screen back and the mounting component 7 through their own deformation. Even if tiny gaps exist, they can fill and cover them, bonding the two tightly and preventing localized connection failures caused by uneven contact surfaces. For example, when the mounting component 7 is made of aluminum, although the metal surface is flat, it is also rigid. Double-sided foam adhesive can create a flexible transition between the metal mounting component 7 and the back of the LCD screen 1, ensuring connection strength while avoiding compatibility issues caused by rigid contact.

[0062] The flexible connector 8 reduces rigid friction between the mounting component 7 and the back of the screen, protecting internal components. The back of the LCD screen 1 is in close contact with internal components such as the liquid crystal layer 14 and color filter 15. If the mounting component 7 is in direct rigid contact with the back of the screen, relative friction during device vibration or transportation can easily cause wear on the back of the screen, potentially affecting the stability of internal components. The flexible nature of the double-sided foam adhesive forms a buffer layer between the two, absorbing the frictional forces generated by vibration and preventing the mounting component 7 from directly rubbing against the back of the screen. Simultaneously, its insulating properties prevent conductive interference between the metal mounting component 7 and the circuitry on the back of the screen, indirectly protecting the signal transmission stability of the flexible circuit board 3. This protective effect is particularly pronounced in scenarios where the mounting component 7 is made of stamped metal sheet metal.

[0063] In addition to double-sided foam adhesive, flexible connector 8 can also use materials such as acrylic double-sided adhesive, silicone gaskets, rubber cushioning pads, and foam pads.

[0064] Please see Figure 6 In some embodiments of this application, the liquid crystal display device further includes a second mid-frame member 62, which is disposed on the side of the extension 171 away from the liquid crystal screen 1, and a first gap 63 is formed between the second mid-frame member 62 and the extension 171. The second mid-frame member 62 is connected to the mounting member 7.

[0065] The second mid-frame member 62 can share and buffer external impact forces for the extension 171, reducing the risk of damage to the extension 171. The extension 171 is made of a thin material; if the edge of the device is subjected to external forces such as collisions or compression, direct impact on the extension 171 can easily cause it to crack or detach. The second mid-frame member 62, located on the outside of the extension 171, can be the first to contact the external force, dispersing and transmitting the impact force to the mounting member 7 and the first mid-frame member 61 through its own rigidity, preventing the external force from concentrating on the extension 171. For example, when the edge of the LCD TV is accidentally bumped, the second mid-frame member 62 will first bear the impact force, transmitting it to the internal support system of the device through the connecting structure, significantly reducing the impact force on the extension 171, thereby protecting the extension 171 from damage and maintaining its shielding and polarization functions for the flexible circuit board 3.

[0066] The first gap 63 prevents the second frame member 62 from directly contacting the extension 171, ensuring the extension 171 functions properly. The extension 171 shields the flexible circuit board 3 and maintains visual continuity with the display surface. If the second frame member 62 and the extension 171 are directly attached, assembly pressure or vibration may cause wrinkles, shifts, or even damage to its polarization characteristics, affecting the light filtering function. The first gap 63 provides independent space for the extension 171, preventing physical compression or friction damage from the rigid structure of the second frame member 62, while maintaining the shielding effect of the extension 171 on the flexible circuit board 3. Furthermore, the first gap 63 provides buffer space for slight deformation of the extension 171; for example, during device transport or slight vibration, the extension 171 can move slightly within the gap, preventing damage caused by rigid contact.

[0067] In some other embodiments, the front side of the second frame member 62, i.e. the side closest to the display surface, may be flush with the liquid crystal screen 1, or higher or lower than the liquid crystal screen 1.

[0068] In some other embodiments, the second middle frame member 62 can be fixed by means of side screw fixing, back screw fixing, bayonet fixing, magnetic fixing, and tape bonding fixing.

[0069] Please see Figure 6 In some embodiments of this application, the liquid crystal display device further includes a shielding member 9, which is disposed on the side of the second middle frame member 62 facing the extension 171, and the shielding member 9 is located on the side of the extension 171 away from the display surface, and the position of the shielding member 9 is opposite to the first gap 63 to shield the first gap 63.

[0070] The shielding component 9 can prevent external contaminants from entering through the first gap 63, thus avoiding impact on the extension 171 and its internal structure. Previously, although the first gap 63 between the second frame component 62 and the extension 171 provided deformation space for the extension 171, the gap itself still had an opening. Dust, small foreign objects, or liquid droplets from the external environment could enter the area surrounding the extension 171 through the gap. The shielding component 9 is positioned opposite the first gap 63, covering the opening of the first gap 63 to form a physical barrier, preventing contaminants from entering the gap. Simultaneously, it does not affect the deformation space reserved for the extension 171 by the first gap 63. The shielding component 9 is located on the side of the extension 171 away from the display surface and does not directly contact the extension 171. This fills the protective gap while preserving buffer space for the extension 171 to move slightly within the gap, ensuring that the protective and buffering functions do not conflict.

[0071] The shielding component 9 conceals the first gap 63, preventing the gap opening from affecting the visual experience. If the first gap 63 is directly exposed, it may appear as a gap with a significant contrast between light and dark under illumination. This gap is more noticeable, especially when there is a slight color difference between the second frame component 62 and the extension 171, disrupting the visual continuity of the device's edge. The shielding component 9 is positioned opposite the first gap 63, completely concealing the gap opening. Furthermore, the color of the shielding component 9 can be adjusted according to design requirements to match the color of the display surface when the screen is not in display mode, the color of the second frame component 62, or even black, creating a continuous visual effect from the display surface to the second frame component 62 and avoiding the visual discontinuity caused by the gap. Simultaneously, the shielding component 9 is located on the side of the extension 171 facing away from the display surface, not affecting the user's viewing experience of the display surface, thus enhancing protection while maintaining a refined appearance. For example, the shielding component 9 can be attached to the second frame component 62 using black single-sided foam adhesive.

[0072] Please see Figure 8 In some other embodiments of this application, the second middle frame member 62 has a blocking portion 621 on the side facing the extension 171, and the blocking portion 621 is located on the side of the extension 171 away from the display surface, and the position of the blocking portion 621 is opposite to the first gap 63 to block the first gap 63.

[0073] The shielding part 621, as part of the second middle frame member 62, reduces the number of independent components and improves the compactness of the device structure. By directly placing the shielding part 621 on the side of the second middle frame member 62 facing the extension 171, the two form an integrated structure, eliminating the need for an additional independent shielding part 621 and the design of additional fixing structures, significantly simplifying the component composition and assembly process of the device. The shielding part 621 can perform the same function as the shielding member 9 described above, and will not be elaborated further here.

[0074] In some embodiments of this application, the liquid crystal display device is a liquid crystal television, and the first edge 101 is at least one of the upper edge, lower edge, or side edge of the liquid crystal screen 1 of the liquid crystal television.

[0075] like Figure 4 As shown, the first edge 101 is the lower edge of the LCD screen 1, and the corresponding flexible circuit board 3, extension 171, etc. are disposed on this edge; as Figure 9 As shown, the first edge 101 is the side edge of the LCD screen 1, and the corresponding flexible circuit board 3, extension 171, etc. are disposed on this edge; as Figure 10 As shown, the first edge 101 is the upper edge of the LCD screen 1, and the corresponding flexible circuit board 3, extension 171, etc. are disposed on this edge.

[0076] LCD TV screens are relatively large, and the flexible circuit board 3 may be connected to different edges depending on the internal circuit layout. For example, the lower edge often needs to be connected to the flexible circuit board 3 to transmit drive signals because it is close to the power interface and signal interface. The side edge or the top edge may be set with auxiliary flexible circuit boards 3 due to the needs of screen partition control. Extending the first edge 101 to at least one edge means that no matter which edge the flexible circuit board 3 is connected to, it can be shielded by the extension 171, thereby preventing it from blocking the LCD screen 1 and achieving a full-screen effect.

[0077] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A liquid crystal display device, characterized in that, The liquid crystal display device includes: A liquid crystal display screen; the liquid crystal display screen includes a first polarizer disposed on the display surface of the liquid crystal display screen; A flexible circuit board; the flexible circuit board is connected to the first edge of the liquid crystal screen and is used to provide display driving signals for the liquid crystal screen; A fastener; the fastener is located on the back side of the LCD screen, and the back side of the LCD screen is connected to the fastener; The first polarizer forms an extension at least along the first edge of the liquid crystal screen, and the extension extends to the side of the flexible circuit board facing the display surface to block the flexible circuit board.

2. The liquid crystal display device as claimed in claim 1, characterized in that, The liquid crystal display device further includes a support member disposed on the side of the extension away from the display surface.

3. The liquid crystal display device as described in claim 2, characterized in that, The color of the support member is the same as the color of the display surface of the LCD screen when it is not in display mode.

4. The liquid crystal display device as claimed in claim 2, characterized in that, The support component is made of flexible adhesive, plastic, rubber, or silicone.

5. The liquid crystal display device as claimed in claim 1, characterized in that, The fastener includes a first mid-frame component and a mounting component. The mounting component is connected to the first mid-frame component, and the back of the LCD screen is connected to the mounting component.

6. The liquid crystal display device as claimed in claim 5, characterized in that, The mounting component is made of rubber, plastic, silicone, or metal.

7. The liquid crystal display device as described in claim 5 or 6, characterized in that, The back of the LCD screen and the mounting component are connected by a flexible connector.

8. The liquid crystal display device as described in claim 5 or 6, characterized in that, The liquid crystal display device further includes a second mid-frame component, which is disposed on the side of the extension away from the liquid crystal screen, and there is a first gap between the second mid-frame component and the extension. The second mid-frame component is connected to the mounting member.

9. The liquid crystal display device as claimed in claim 8, characterized in that, The liquid crystal display device further includes a shielding member, which is disposed on the side of the second middle frame member facing the extension, and the shielding member is located on the side of the extension away from the display surface, and the position of the shielding member is opposite to the first gap, so as to shield the first gap; Alternatively, the second middle frame member has a blocking portion on the side facing the extension, and the blocking portion is located on the side of the extension away from the display surface, and the position of the extension is opposite to the first gap, so as to block the first gap.

10. The liquid crystal display device as claimed in claim 1, characterized in that, The liquid crystal display device is a liquid crystal television set, and the first edge is at least one of the upper edge, lower edge, or side edge of the liquid crystal screen of the liquid crystal television set.

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