A mobile phone and a narrow-screen borderless liquid crystal display screen thereof

Abstract

The present application relates to liquid crystal display screen technical field, specifically, it relates to a kind of mobile phone and its narrow screen frameless liquid crystal display screen. Including frame and display panel, display panel is set on the frame, display panel includes visual panel and peripheral frame;Peripheral frame lower surface is opened U-shaped circulation groove along circumference, and the two ends openings of circulation groove are flow inlet and flow outlet respectively;Fixed plate is fixedly installed in flow outlet opening, and flow gap is formed between adjacent fixed plate;Frame edge is equipped with glue groove in the position corresponding flow inlet;Frame edge is equipped with anti-overflow mechanism in the position corresponding flow gap, for secondary receiving and guiding light-shielding glue;Glue groove and flow inlet are communicated to form overflow glue guiding channel, block light-shielding glue to backlight system, through the cooperation of glue groove and U-shaped circulation groove, light-shielding glue overflowed during installation is accurately guided to anti-overflow mechanism, fundamentally block the path of light-shielding glue contacting backlight system, eliminate visual panel edge black shadow defect.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display technology, and more specifically, to a mobile phone and its narrow-screen borderless liquid crystal display. Background Technology

[0002] With the development of smartphone intelligence and users' pursuit of smartphone appearance, it is required that the distance between the left and right edges of the LCD (liquid crystal display panel) and the left and right edges of the LCM (liquid crystal display screen) be close to zero from the source design of the phone backlight. This makes the phone screen ratio larger, the visual impact more impactful, and meets market demand.

[0003] Current liquid crystal displays (LCDs) mainly include a metal frame, a plastic frame, an LCD panel, a reflective sheet, a light guide plate, a diffuser, a prism sheet, a light-shielding adhesive, a lamp, and an FPC circuit. The LCD panel, reflective sheet, light guide plate, diffuser, prism sheet, and lamp are all housed within the cavity formed by the metal frame and the plastic frame. Thicker plastic and metal frames provide better structural performance, mechanical strength, and anti-static properties for the mobile phone LCD display, but they cannot meet the requirements for narrow bezels and high screen-to-body ratios. Therefore, Chinese Patent Publication No. CN105044979A discloses a mobile phone and its narrow-screen bezel-less liquid crystal display. The LCD display, by placing the liquid crystal display panel above the frame and covering the cavity of the frame, with the width of the liquid crystal display panel being greater than the width of the cavity, and a light-shielding adhesive placed between the liquid crystal display panel and the frame, replaces the traditional practice of placing the liquid crystal display panel inside the cavity of the frame. This allows for increased screen-to-body ratio, reduced black border areas, enhanced user experience, and improved backlight system reliability while ensuring the strength of the LCD display. Furthermore, by reducing the thickness of the frame, it reduces the amount of raw materials used, saves materials, and lowers production costs.

[0004] In the aforementioned prior art, the frame edge and the LCD screen bezel are fixed with light-shielding adhesive. The solution mentions that black or black-and-white light-shielding adhesive can be used. However, in display manufacturing and installation scenarios, the adhesive is essentially applied to the upper edge of the frame. When workers or machines attach and install the LCD screen, the mutual pressure between the edges causes the adhesive to expand or overflow. This can lead to the adhesive overflowing into the cavity of the frame, making it easy for it to come into contact with the backlight system. This can result in obstruction of the backlight system, causing abnormal light transmission and resulting in black shadows when the LCD screen displays images, leading to a poor viewing experience for the user. Summary of the Invention

[0005] This invention provides a narrow-screen, borderless liquid crystal display screen. By creating a groove on the edge of the frame that aligns with a circulation groove below the display panel, when light-shielding adhesive overflows, the overflowing adhesive flows in through the inlet and out through the outlet, squeezing the receiving platform. Excess adhesive, after being squeezed out of the receiving platform, flows into an adhesive storage cavity below the fixing plate on the upper surface of the frame. This solves the problems mentioned in the background art, namely:

[0006] Excessive light-blocking adhesive can easily flow into the recessed cavity of the frame, blocking the backlight system and causing shadows to appear on the visible panel, thus affecting the user's viewing experience.

[0007] To achieve the above objectives, the liquid crystal display screen includes a frame and a display panel covering the frame. The display panel has a view panel and an outer bezel. A U-shaped circulation groove is formed on the lower surface of the outer bezel along its circumference, with an inlet and an outlet at the two ends of the circulation groove, respectively.

[0008] The outlet is provided with staggered fixed plates, and a flow guiding gap is formed between adjacent fixed plates;

[0009] The frame edge is provided with a glue groove at the position corresponding to the inlet;

[0010] An anti-overflow mechanism is provided at the edge of the frame directly opposite the flow guide gap;

[0011] The glue tank is connected to the inlet to form an overflow guide channel, and the overflowing light-shielding glue flows sequentially through the inlet, the circulation groove, and the outlet to the anti-overflow mechanism.

[0012] The frame has a glue storage cavity on its edge, and multiple horizontal plates are installed alternately above the glue storage cavity.

[0013] The anti-overflow mechanism guides the light-shielding adhesive into the adhesive storage cavity below the horizontal plate on the edge of the frame, blocking the flow of the light-shielding adhesive to the backlight system located in the center of the frame.

[0014] When attaching the frame to the display panel, the light-shielding adhesive is applied along the adhesive groove on the edge of the frame. During the installation process, the display panel continuously squeezes the light-shielding adhesive. The squeezed adhesive flows into the inlet of the circulation groove and then flows out from the outlet. Excess adhesive squeezes the receiving platform of the anti-overflow mechanism, causing it to sink. The overflowing adhesive flows into the adhesive storage cavity below the horizontal plate on the edge of the frame for storage.

[0015] In the above technical solution, the inlet of the circulation channel gradually widens inward to store more overflowing colloid. In addition, the gaps at the outlet of the circulation channel are connected by staggered fixed plates. At the same time, the fixed plates correspond one-to-one with the horizontal plates on the edge of the frame, so that there is no extra gap between the outlet and the anti-overflow mechanism. The colloid is precisely squeezed into the receiving platform of the anti-overflow mechanism, so that the colloid flows along the inclined surface of the sliding platform into the colloid storage cavity below the horizontal plate for storage.

[0016] Based on this, the anti-overflow mechanism includes a receiving platform and an isolation box embedded in the frame. The receiving platform is normally flush with the upper surface of the fixed plate, and there are gaps between the two sides of the receiving platform and the adjacent horizontal plates. The cross-section of the receiving platform is an inverted trapezoid, and two inclined sides are provided below the receiving platform. When installing the display panel, the light-shielding adhesive near the receiving platform flows into the adhesive storage cavity along the gaps on both sides of the receiving platform.

[0017] In another technical solution, the lower surface of the receiving platform is elastically connected to the inner bottom surface of the isolation box via an elastic element, allowing the receiving platform to move vertically. A sliding platform is provided below the receiving platform, and the sliding platform is slidably connected to a groove opened above the isolation box via a slider at the bottom. A limit element is fixedly installed at the center of the groove. When the receiving platform is squeezed downward by the light-shielding adhesive, the elastic element contracts downward under the extrusion force to accumulate elastic potential energy. The vertical displacement of the receiving platform causes the inclined surfaces on both sides to press against the inclined surface of the sliding platform, resulting in a biased extrusion force. This causes the sliding platform to move laterally. At this time, the downward displacement of the receiving platform creates a depression, which, together with the lateral movement of the sliding platform, forms an inclined surface for adhesive flow, thereby expanding the adhesive overflow channel.

[0018] Furthermore, the frame has a recessed cavity at its center, and the reflective sheet, light guide plate, diffuser sheet, lower brightness enhancement sheet and upper brightness enhancement sheet stacked in the cavity from bottom to top constitute a backlight system to provide sufficient light source for the display panel.

[0019] In this technical solution, a sealing ring is provided in the gap between the backlight system and the recessed cavity of the frame. The sealing ring reduces the overflow of the adhesive and ensures that the backlight system inside is securely installed, making the overall structure of the mobile phone more compact.

[0020] The present invention also provides a mobile phone, including the aforementioned narrow-screen borderless liquid crystal display, which achieves a high screen-to-body ratio while preventing the light-shielding adhesive from overflowing onto the surface of the backlight system.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] Through the coordinated flow guidance of the glue tank and the U-shaped circulation channel, the light-shielding glue overflowing during installation is precisely guided to the anti-overflow mechanism. In the anti-overflow mechanism, the vertical displacement of the receiving platform under pressure is converted into the horizontal displacement of the sliding platform through the inclined plane linkage, dynamically expanding the glue overflow channel, so that the excess glue can flow into the glue storage cavity under the frame horizontal plate for storage. Combined with the physical isolation of the sealing ring around the backlight system, the path of the light-shielding glue to the backlight system is fundamentally blocked, eliminating the black shadow defect at the edge of the visible panel. At the same time, this structure does not require increasing the width of the outer bezel or sacrificing mechanical strength, so that the mobile phone can achieve the visual effect of the ultra-narrow bezel while ensuring display quality and reliability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a partial structural diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0027] Figure 5 This is a partial structural diagram of the display panel of the present invention;

[0028] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle;

[0029] Figure 7 This is a schematic diagram of the internal structure of the frame of the present invention;

[0030] Figure 8 For the present invention Figure 7 Enlarged view of point C in the middle;

[0031] Figure 9 This is a partial structural schematic diagram of the anti-overflow mechanism of the present invention.

[0032] The meanings of the various markings in the diagram are as follows:

[0033] 100. Frame; 101. Adhesive tray; 102. Reflector; 103. Light guide plate; 104. Diffuser; 105. Lower brightness enhancement sheet; 106. Upper brightness enhancement sheet; 107. Sealing ring;

[0034] 200. Display panel; 201. Visible panel; 202. Inlet; 203. Outlet; 204. Fixing plate; 205. Anti-overflow mechanism; 2051. Receiving platform; 2052. Elastic element; 2053. Sliding platform; 2054. Limiting element; 2055. Isolation box; 206. Light-shielding adhesive layer. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In existing technologies, the light-blocking adhesive easily overflows and flows into the recessed cavity of the frame 100, blocking the backlight system and causing shadows on the visible panel 201, thus affecting the user's viewing experience. This invention provides a narrow-screen, borderless LCD display. (See [link to relevant documentation]). Figures 1-4 As shown, it includes a frame 100 and a display panel 200. The display panel 200 is disposed above the frame 100. The display panel 200 includes a visible panel 201 and an outer frame. A U-shaped circulation groove is formed on the lower surface of the outer frame along the circumference. The two ends of the circulation groove are an inlet 202 and an outlet 203, respectively.

[0037] The circulation channel expands inward along the inlet 202, forming a relatively large colloidal cavity.

[0038] Figures 5-6 In the middle, fixed plates 204 are staggered and fixed at the opening of the outlet 203. A guide gap is formed between adjacent fixed plates 204. The long side of the guide gap is 0.1-0.15mm longer than the fixed plate 204, and the length of the guide gap is consistent with the length of the receiving platform 2051 of the anti-overflow mechanism 205 in the side groove of the frame 100.

[0039] A glue groove 101 is provided on the edge of the frame 100 at the position corresponding to the inlet 202;

[0040] The glue tank 101 is connected to the inlet 202 to form an overflow glue guiding channel, blocking the flow of the light-shielding glue to the backlight system;

[0041] The outer frame of the display panel 200 is fixed to the edge of the frame 100 by a light-shielding adhesive layer 206.

[0042] During installation, when the display panel 200 and the frame 100 are pressed together by the light-shielding adhesive layer 206, the light-shielding adhesive is applied along the adhesive groove 101 on the edge of the frame 100. The adhesive groove 101 is connected to the inlet 202 of the U-shaped circulation groove on the lower surface of the outer frame of the display panel 200. The overflowing adhesive is first captured by the inlet 202 of the circulation groove, forming a primary flow channel, which forces the overflowing adhesive to flow directionally along the circulation groove to the outlet 203. The fixed plates 204 staggered at the outlet 203 control the flow rate of the adhesive through the adjacent flow guide gaps and precisely guide the adhesive to the anti-overflow mechanism 205. The anti-overflow mechanism 205 acts as a secondary control barrier, receiving the adhesive through the receiving platform 2051 and guiding it to flow along the gaps on both sides into the adhesive storage cavity below the horizontal plate on the edge of the frame 100. The adhesive storage cavity is not shown in the figure, thereby completely blocking the path of the light-shielding adhesive to the central area of ​​the cavity where the backlight system is located.

[0043] See Figures 7-9 As shown, the anti-overflow mechanism 205 includes a receiving platform 2051 and an isolation box 2055 embedded inside the frame 100. The receiving platform 2051 is normally flush with the upper surface of the fixing plate 204, and there are gaps between the two sides of the receiving platform 2051 and the adjacent horizontal plates. After applying the light-shielding adhesive, when pressing and installing, the part of the light-shielding adhesive near the gap will flow down from the reserved gap first.

[0044] Figure 9 In the middle, the receiving platform 2051 is elastically connected to the inner bottom surface of the isolation box 2055 through the elastic element 2052 (when the glue pressure is ≥10kPa, the elastic element 2052 is pressed downward and drives the receiving platform 2051 to shrink; when the glue pressure is ≤6kPa, the elastic element 2052 drives the receiving platform 2051 to reset). The isolation box 2055 is located inside the edge of the frame 100. The elastic connection between the isolation box 2055 and the elastic element 2052 allows the receiving platform 2051 to move vertically. The upper surface of the isolation box 2055 has sliding tables 2053 slidably connected to the sliding grooves on both sides through sliders. The center of the sliding groove is provided with a limiting element 2054 to limit the movement range of the sliding table 2053. The cross-section of the receiving platform 2051 is an inverted trapezoid, and its inclined surface contacts the inclined surface of the sliding table 2053. When the receiving platform 2051 is squeezed downward by the light-shielding glue, the vertical displacement is converted into the horizontal displacement of the sliding table 2053 through the inclined surface cooperation, thereby expanding the glue overflow channel.

[0045] When the light-shielding adhesive flows from the outlet 203 through the guide gap of the fixed plate 204 to the anti-overflow mechanism 205, the adhesive accumulation compresses the receiving platform 2051 and causes it to move downward. The receiving platform 2051 achieves vertical displacement through the elastic contraction of the elastic element 2052. At the same time, the inclined surface of its inverted trapezoidal section and the inclined surface of the sliding platform 2053 generate a wedge-shaped squeezing effect, decomposing the vertically downward mechanical force into a horizontal component force, driving the sliding platform 2053 to slide horizontally outward along the slide groove on the isolation box 2055. The horizontal displacement of the sliding platform 2053 is limited by the limiting element 2054 at the center of the slide groove, ensuring that the displacement is within the design threshold.

[0046] Additionally, see Figure 4 As shown, a recessed cavity is formed in the center of the frame 100. A reflective sheet 102, a light guide plate 103, a diffuser 104, a lower brightness enhancement sheet 105, and an upper brightness enhancement sheet 106 are arranged sequentially from bottom to top in the recessed cavity to form a backlight system. A sealing ring 107 is installed between the backlight system and the recessed cavity of the frame 100. The sealing ring 107 prevents the colloid from penetrating longitudinally into the backlight system and forms a double isolation in both the horizontal and vertical directions with the anti-overflow mechanism 205.

[0047] Example 1: Installation of the anti-overflow mechanism 205 and the overall structure

[0048] First, a U-shaped annular groove with a depth of 0.20±0.01mm is precisely machined on the outer frame of the display panel 200 using a chemical etching process. Then, a 2μm thick release agent is sprayed into the adhesive groove 101 of the frame 100. In this embodiment, the release agent can be UV-cured silicone resin or solvent-based silicone oil from the prior art. Subsequently, the isolation box 2055 is pressed into a predetermined position on the side wall of the frame 100, and an elastic element 2052 with a pre-compressed stroke of 10% is installed. In this embodiment, the elastic element 2052 can be a silicone spring. The inverted trapezoidal receiving platform 2051 is fixed by laser welding so that its initial height is flush with the horizontal plate. After applying high-temperature grease to the side wall of the slider, the sliding platform 2053 is assembled into the groove.

[0049] Finally, the robotic arm operates at 0.5 N / mm. 2 The pressure presses the display panel 200 and the frame 100 together, and holds the pressure for 10 seconds to cure the light-shielding adhesive layer 206. At this time, the overflowing adhesive is guided by the circulation groove and enters the channel through the inlet 202. When the adhesive pressure exceeds 10 kPa, it pushes the receiving platform 2051 to move down. The inclined plane drives the sliding platform 2053 to move horizontally to widen the flow gap. The excess adhesive is dynamically guided into the adhesive storage cavity below the horizontal plate.

[0050] Example 2: Flow diversion response verification

[0051] After installing the anti-overflow mechanism 205 according to the installation method of Example 1, a pressure test can be performed. The test method is as follows:

[0052] 1. Pour black and white opaque adhesive or dark black opaque adhesive with a viscosity of 8000 cP into the adhesive tank 101 at a flow rate of 0.8 N / mm. 2 Pressure simulation of overpressure conditions;

[0053] 2. Record the testing process using a high-speed camera, wherein the high-speed camera is a device with a shooting speed greater than 1000fps for recording;

[0054] 3. The overflowing colloid is introduced into the colloid storage cavity, leaving the backlight system surface free of contamination.

[0055] The high-speed camera test records in Example 2 show that, when using a robotic arm at a speed of 0.8 N / mm... 2 In the simulation experiment of pressure overpressure, the light-shielding colloid fills the glue tank 101 within 3.2 seconds and flows into the circulation tank along the inlet 202. When the glue pressure at the outlet 203 reaches 10.5 kPa, the receiving platform 2051 moves down by 0.32 mm and the sliding platforms 2053 on both sides move laterally by 0.16 mm, thus expanding the overall flow gap. The colloid overflowing due to extrusion is completely guided and stored in the glue storage cavity below the horizontal plate of the frame 100. After the colloid is stored in the outflowing part, when the glue pressure drops to 6.5 kPa, the receiving platform 2051 is rebounded by the elastic potential energy of the elastic element 2052 and returns to the position flush with the horizontal plate. The gap between its two sides and the horizontal plate is filled by the light-shielding colloid.

[0056] Comparative Example 1: A frame 100 without an anti-overflow mechanism 205 in a conventional structure is pressed together with a display panel 200 without a circulation groove. The pressing process parameters are the same as in Example 1.

[0057] Comparative Example 2: The difference from Example 1 is that only a circulation groove is used to store the overflow colloid, without the anti-overflow mechanism 205, and the pressing process parameters are the same as in Example 1.

[0058] Experimental Example 1: Comparative Test of Shadow Defect Rate (30 pressing machines each from Example 1, Comparative Example 1, and Comparative Example 2 were used for testing. The pressing conditions were set at 10 machines per group, using standard pressing, with a robotic arm pressure of 0.5 N / mm.) 2 Under pressure and overpressure conditions, the robotic arm operates at 0.8 N / mm. 2 Pressure, and high temperature and high humidity environment (temperature 85℃, humidity 85%RH)

[0059] This experimental example provides a method for testing the shadow defect rate:

[0060] 1. Testing equipment includes: an OLED low-light camera (model Hamamatsu C13440-20CU) for detecting 0.01mm... 2Resolution shading; a standard light source box (model GTAT-500A) providing a 2000 lux standard D65 light source for the testing process; an environmental simulation chamber (model ESPEC SH-661) for controlling temperature and humidity during the testing process; and Image-Pro Premier 9.3 analysis software for automatic defect identification and analysis.

[0061] 2. Testing process:

[0062] S1. Place a standard white board (98% reflectivity) at the test position, use a low-light camera to take a reference image with an exposure of 50ms, set the brightness threshold of 230 in the software, and use the standard white board as the defect-free standard.

[0063] S2. Power on the sample and display a full white screen. Use an OLED low-light camera to take pictures at a vertical distance of 10cm from the screen. Scan the 2mm ring band around the edge of the visible panel 201 in sequence. Select three 10mm*2mm areas on the top, bottom, left, and right edges of each sample.

[0064] S3. Statistical analysis of sample defect rate and screen defect area during the experiment (judgment criterion: >0.01mm). 2 ).

[0065] Table 1 Results of Shadow Defect Rate Test

[0066]

[0067] Conclusion: Based on the experimental results in Table 1, Example 1 of the present invention showed no defects at any edge under standard pressing conditions (defect area 0.00 mm). 2 Under overpressure conditions, only 0.005mm appeared on the right edge. 2 Minor defects (below the judgment threshold of 0.01mm) 2 The traditional structure, in comparison example 1, exhibited significant defects during standard pressing (0.24mm at the upper edge). 2 0.18mm on the left edge 2 Under overpressure conditions, the defect area further expands to 0.32 mm. 2 (Lower edge), maintaining a thickness of 0.13-0.28mm even under high temperature and high humidity conditions. 2 Defects; Comparative Example 2 showed no defects during standard pressing, but multiple defects appeared under overpressure conditions (0.12mm on the left edge). 2 ), and 0.02-0.03mm can also be produced under high temperature and high humidity conditions. 2 The defect indicates that the present invention, through the synergistic effect of the circulation channel and the anti-overflow mechanism 205, can effectively control the defect area (≤0.008mm) under various working conditions. 2 This method can effectively reduce the defect area while improving the product yield.

[0068] In addition, the present invention also provides a mobile phone, including the aforementioned narrow-screen borderless liquid crystal display, which achieves a high screen ratio while preventing the light-shielding adhesive from overflowing onto the surface of the backlight system.

[0069] Working principle: During the pressing and installation of the display panel 200 and the frame 100, the adhesive that overflows from the light-shielding adhesive layer 206 under pressure is first captured by the inlet 202 of the circulation groove, and then enters the U-shaped circulation groove of the outer frame of the display panel 200 for directional flow. After the adhesive flows along the circulation groove to the outlet 203, the flow rate is controlled by the flow guide gap formed by the staggered fixing plate 204, and it is precisely guided to the anti-overflow mechanism 205.

[0070] When the adhesive pressure is ≥10kPa, the receiving platform 2051 moves downward under pressure, driving the sliding platform 2053 to horizontally displace and expand the flow gap through the inverted trapezoidal inclined surface. At the same time, the elastic element 2052 stores energy. The overflow adhesive flows along the expanded channel and the gaps on both sides of the receiving platform 2051 into the adhesive storage cavity below the edge horizontal plate of the frame 100 for storage. When the adhesive pressure is ≤6kPa, the elastic element 2052 resets and closes the channel. Combined with the longitudinal isolation of the outer sealing ring 107 of the backlight system, the path of the light-shielding adhesive to the backlight system is completely blocked, eliminating edge shadow defects.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A narrow frame borderless liquid crystal display screen, comprising a frame (100) and a display panel (200) covering above the frame (100), the display panel (200) having a visible panel (201) and a peripheral frame; characterized in that: The outer peripheral frame lower surface is provided with a U-shaped circulation groove along its circumference, and the two ends of the circulation groove are respectively a flow inlet (202) and a flow outlet (203); The flow outlet (203) is provided with fixed plates (204) arranged alternately, and a flow guide gap is formed between adjacent fixed plates (204); The frame body (100) is provided with a glue groove (101) at a position corresponding to the flow inlet (202) on the edge thereof; The frame body (100) is provided with an anti-overflow mechanism (205) at a position corresponding to the flow guide gap on the edge thereof; The glue groove (101) is in communication with the flow inlet (202) to form an overflow glue guide channel, and the overflowed light shielding glue flows to the anti-overflow mechanism (205) through the flow inlet (202), the circulation groove and the flow outlet (203) in sequence; The frame body (100) is provided with a glue storage cavity on the edge thereof, and a plurality of horizontal plates are alternately arranged above the glue storage cavity; The anti-overflow mechanism (205) guides the light shielding glue into the glue storage cavity below the horizontal plates on the edge of the frame body (100), and blocks the light shielding glue from flowing to the backlight system arranged in the center of the frame body (100); The anti-overflow mechanism (205) comprises a receiving table (2051) and an isolation box (2055) embedded in the frame body (100), the receiving table (2051) is flush with the upper surface of the fixed plate (204) in normal state, and a gap is left between the two sides of the receiving table (2051) and the adjacent horizontal plates, the cross section of the receiving table (2051) is inverted trapezoidal, and two inclined side surfaces are arranged below the receiving table (2051); The lower surface of the receiving table (2051) is elastically connected to the inner bottom surface of the isolation box (2055) through an elastic member (2052), so that the receiving table (2051) can vertically displace; A sliding table (2053) is arranged below the receiving table (2051), the sliding table (2053) is slidingly connected to a sliding groove arranged above the isolation box (2055) through a sliding block at the bottom thereof, and a limiting member (2054) is fixedly arranged at the center of the sliding groove; The movement range of the sliding table (2053) is limited by the limiting member (2054) at the center of the sliding groove of the isolation box (2055). 2.The narrow-screen bezel-free liquid crystal display panel of claim 1, wherein: The frame body (100) is provided with a concave cavity in the center thereof, and the concave cavity comprises a reflector (102), a light guide plate (103), a diffusion sheet (104), a lower light enhancement sheet (105) and an upper light enhancement sheet (106) stacked in sequence from bottom to top, thereby forming a backlight system. 3.The narrow-screen bezel-free liquid crystal display panel of claim 2, wherein: A sealing ring (107) is arranged between the backlight system and the concave cavity of the frame body (100). 4.The narrow-screen bezel-less liquid crystal display according to claim 1, characterized in that: The outer peripheral frame of the display panel (200) is fixed to the edge of the frame body (100) through a light shielding glue layer (206). 5.The narrow-screen bezel-less liquid crystal display panel of claim 1, wherein: The glue storage cavity is arranged below the horizontal plates on the edge of the frame body (100), and the volume of the glue storage cavity is not less than 150% of the volume of the glue groove (101).

6. A handset, characterized by: The narrow-screen frameless liquid crystal display screen comprises the frameless liquid crystal display screen according to any one of claims 1 to 5, and high screen ratio and no display shadow defect are realized.

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