Anti-ghost flicker liquid crystal display module

Abstract

The utility model relates to the technical field of liquid crystal display screens, in particular to an anti-ghost flicker liquid crystal display module which comprises a circuit board, a display screen is fixedly installed on the front face of the circuit board, and a dynamic monitoring module, a driving circuit module and a power supply voltage stabilizing unit are fixedly installed on the back face of the circuit board. A positioning frame is glued to the circuit board on the outer side of the display screen, the side, away from the circuit board, of the positioning frame and the front face of the display screen are located on the same plane, and a cushion is glued to the front face of the circuit board on the inner side of the positioning frame; and an electromagnetic shielding cover is mounted on the circuit board on the outer sides of the dynamic monitoring module, the driving circuit module and the power supply voltage stabilizing unit in a gluing manner. The problems that in the prior art, due to a mechanical dust removal scheme, secondary electromagnetic interference is generated during coil work, display signal distortion is aggravated, and liquid leakage is likely to happen to a screen when a shell vibrates due to the installation mode of the electronic display screen are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid crystal display screen technical field, concretely is a kind of with prevent residual image flicker liquid crystal display module. BACKGROUND

[0002] Liquid crystal display, full name is thin film transistor driven active matrix liquid crystal display, working principle is based on the unique electro-optic property of liquid crystal molecules.When electric field is applied, the arrangement direction of liquid crystal molecules will change, and then the light transmittance of external light source is changed, and the electric-optical conversion is completed.After that, by different degrees of excitation to red (R), green (G), blue (B) three primary color signals, these signals pass through red, green, blue three primary color filter film, and realize color reappearing in time domain and space domain, finally form the picture that we see.IPS, TFT, SLCD all belong to the subclass of LCD, and their picture presentation mainly relies on current stimulation liquid crystal molecules to produce point, line and plane, and cooperate with back lamp to complete.

[0003] After a large amount of retrieval, the publication number CN213582937U discloses a residual image elimination liquid crystal display screen, which belongs to the technical field of liquid crystal display screen, and comprises a shell, an electronic display screen is fixed in the interior of the shell, a second threaded rod is rotationally connected in the interior of the shell, and a second traction block is threadedly connected to the outer wall of the second threaded rod.In the prior art, the mechanical dust removal scheme is used to solve the heat dissipation problem, specifically, the motor drives the threaded rod to drive the brush to clean the screen, and the electromagnetic coil is used to drive the suction nozzle to adsorb dust.

[0004] However, only relying on physical cleaning and the coil will produce secondary electromagnetic interference when working, thereby aggravating display signal distortion, and the installation mode of the electronic display screen can cause the shell to vibrate directly, thereby causing the electronic display screen to vibrate, thereby causing the electronic display screen to leak, and therefore a kind of with prevent residual image flicker liquid crystal display module is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of with prevent residual image flicker liquid crystal display module, with the advantages of reducing electromagnetic interference, reducing display signal distortion and preventing screen from leaking due to vibration, solve the problem that the coil works to produce secondary electromagnetic interference aggravating display signal distortion in the mechanical dust removal scheme in prior art, and screen is prone to leak when shell vibrates due to installation mode of electronic display screen.

[0006] To achieve the above object, the utility model provides the following technical scheme: A have anti -image flicker liquid crystal display module, including circuit board, the front surface fixed mounting of circuit board has display screen, the back of circuit board fixed mounting has dynamic monitoring module, drive circuit module and power supply voltage stabilizing unit, the circuit board of display screen outside is cemented with positioning frame, the side of positioning frame away from circuit board is with display screen front surface in the same plane, the front surface cemented mounting of circuit board inside positioning frame has buffer pad,

[0007] The circuit board outside the dynamic monitoring module, the drive circuit module and the power supply voltage stabilizing unit is cemented with an electromagnetic shield.

[0008] Preferably, the front surface of the circuit board is provided with a reserved hole, and a plug-in pin is installed on the circuit board through the reserved hole.

[0009] In the design, the reserved hole and the plug-in pin are matched to realize the fast and accurate alignment connection of the circuit board and the external equipment.

[0010] Preferably, recesses are formed in the circuit board at both ends of the mounting hole, and a reinforcing washer is embedded in the recesses.

[0011] In the design, the double-layer reinforcing washer at the mounting hole realizes uniform stress distribution during bolt fastening, effectively prevents micro-crack propagation of the circuit board in a mechanical vibration scene, and compensates for the tolerance gap through elastic deformation, thereby improving the overall anti-vibration performance of the module.

[0012] Preferably, a connection cable is installed at the bottom of the display screen, one end of the connection cable away from the display screen passes through the reserved slot and is inserted into the cable connection slot, a tape is attached to the front surface of the display screen, the tape is cemented with the display screen and the connection cable, and the back surface of the display screen is in contact with the buffer pad cemented on the circuit board but not fixedly connected.

[0013] In the design, the non-fixed contact cooperation of the display screen and the buffer pad realizes adaptive displacement buffering when the screen is impacted, avoiding the rupture of the glass substrate caused by rigid connection; the three-dimensional wrapping of the tape realizes mechanical stress isolation and anti-oxidation protection of the root weld of the connection cable.

[0014] Preferably, a protective sticker is attached to the connection cable at the cable connection slot, and the two ends of the protective sticker pass through the connection cable and are attached to the back surface of the circuit board.

[0015] In the design, through the cross-connection type attachment structure of the protective sticker, electromagnetic shielding full coverage of the wire connecting slot connecting the wire is realized, and a physical isolation layer is formed to prevent abnormal contact impedance caused by environmental moisture or dust invasion of the metal contact.

[0016] Preferably, the electromagnetic shielding cover is composed of a copper-nickel alloy inner layer and a permalloy outer layer by a hot pressing composite process, the inner surface of the electromagnetic shielding cover is provided with an array of heat-conducting silicone protrusions, each protrusion is distributed in multiple rows and multiple columns at equal intervals, and the surface of the electromagnetic shielding cover is provided with a honeycomb-shaped opening array.

[0017] In the design, the layered structure of the electromagnetic shielding cover formed by the copper-nickel alloy and the permalloy realizes gradient attenuation of wide-band electromagnetic interference; the honeycomb-shaped opening array realizes directional optimization of the internal component heat dissipation channel under the premise of ensuring shielding effectiveness; and the matrix arrangement of the heat-conducting silicone protrusions forms a contact type heat conduction interface, so that the heat of the key chip can be uniformly conducted to the surface of the shielding cover.

[0018] Compared with the prior art, the electromagnetic shielding cover has the following beneficial effects:

[0019] The electromagnetic shielding cover is glued and attached to the circuit board outside the dynamic monitoring module, the driving circuit module and the power supply voltage stabilizing unit, so that electromagnetic interference generated during the operation of the modules can be effectively shielded, the display signal is prevented from being affected, display signal distortion is reduced, and display quality is improved.

[0020] The positioning frame is glued to the circuit board outside the display screen, the buffer pad is glued and attached to the front surface of the circuit board inside the positioning frame, and the back surface of the display screen is in contact with the buffer pad but is not fixedly connected. When subjected to vibration or impact, the buffer pad can play a buffering role, so that the display screen and the circuit board are prevented from being hard collided, thereby preventing the screen from leaking due to vibration, and prolonging the service life of the display screen. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view structural schematic diagram of the utility model;

[0022] Figure 2 It is a front view structural schematic diagram of the utility model's circuit board;

[0023] Figure 3 It is a rear view structural schematic diagram of the utility model;

[0024] Figure 4 It is a rear view structural schematic diagram of the utility model's circuit board.

[0025] In the figure: 1, circuit board; 11, reserved hole; 12, mounting hole; 13, reinforcing washer; 14, reserved slot; 15, buffer pad; 16, wire harness slot; 2, plug-in pin; 3, display screen; 31, positioning frame; 32, adhesive tape; 4, connecting wire harness; 5, electromagnetic shield; 6, protective sticker; 7, dynamic monitoring module; 8, drive circuit module; 9, power supply voltage stabilizing unit. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] Embodiment one

[0028] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the utility model provides an embodiment: a kind of anti-residual image flicker liquid crystal display module, including circuit board 1, display screen 3 is fixedly installed on the front of circuit board 1, dynamic monitoring module 7, drive circuit module 8 and power supply voltage stabilizing unit 9 are fixedly installed on the back of circuit board 1, positioning frame 31 is glued on the circuit board 1 of display screen 3 outer side, the side of positioning frame 31 deviating from circuit board 1 is in the same plane with the front of display screen 3, buffer pad 15 is glued and installed on the front of circuit board 1 in the inner side of positioning frame 31.

[0029] Dynamic monitoring module 7, drive circuit module 8 and power supply voltage stabilizing unit 9 are glued and installed on the outer side of circuit board 1.

[0030] Specifically, dynamic monitoring module 7, drive circuit module 8 and power supply voltage stabilizing unit 9 are glued and installed on the outer side of circuit board 1, can effectively shield the electromagnetic interference generated when these modules work, avoid its influence on display signal, reduce display signal distortion, improve display quality.

[0031] Positioning frame 31 is glued on the circuit board 1 of display screen 3 outer side, buffer pad 15 is glued and installed on the front of circuit board 1 in the inner side of positioning frame 31, and the back of display screen 3 is in contact with buffer pad 15 but is not fixedly connected.When being subjected to vibration or impact, buffer pad 15 can play a buffering role, avoid the hard collision of display screen 3 and circuit board 1, to prevent screen from appearing liquid leakage due to vibration, prolong the service life of display screen 3.

[0032] Embodiment two

[0033] In order to realize efficient connection of the circuit board and external equipment, and reasonable layout and protection of internal lines, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , in the embodiment, a reserved hole 11 is formed on the front of the circuit board 1, a plug-in pin 2 is installed on the circuit board 1 through the reserved hole 11, a reserved slot 14 is formed at the bottom of the circuit board 1, and a mounting hole 12 is formed at each corner of the circuit board 1. A wire arrangement slot 16 is formed at the lower part of the back of the circuit board 1.

[0034] In the design, the cooperation structure of the reserved hole 11 and the plug-in pin 2 is set to realize the fast and accurate alignment connection of the circuit board 1 and the external equipment. The reserved slot 14 and the wire arrangement slot 16 are cooperatively designed to realize the standardized wiring and anti-bending protection of the connecting wire 4.

[0035] Further, recesses are formed in the circuit board 1 at the upper and lower ends of the mounting hole 12, and a reinforcing gasket 13 is embedded in the recesses.

[0036] In the design, the double-layer reinforcing gasket 13 at the mounting hole 12 is set to realize uniform stress distribution during bolt fastening, effectively prevent micro-crack propagation of the circuit board 1 in a mechanical vibration scene, and compensate for the tolerance gap through elastic deformation, thereby improving the overall anti-vibration performance of the module.

[0037] Embodiment three

[0038] In order to realize the all-around protection and electromagnetic shielding, heat dissipation optimization of the display screen and its connecting wire, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , in the embodiment, the protection and optimization of the display screen and its connecting wire are mainly designed. The connecting wire 4 is installed at the bottom of the display screen 3, one end of the connecting wire 4 away from the display screen 3 passes through the reserved slot 14 and is inserted into the wire arrangement slot 16, the adhesive tape 32 is attached to the front bottom of the display screen 3, the adhesive tape 32 is glued to the display screen 3 and the connecting wire 4, and the back of the display screen 3 is in contact with the buffer pad 15 glued to the circuit board 1 but is not fixedly connected.

[0039] In the design, the non-fixed contact cooperation of the display screen 3 and the buffer pad 15 realizes the adaptive displacement buffer of the screen when impacted, avoiding the glass substrate rupture caused by hard connection; the three-dimensional wrapping fixation of the adhesive tape 32 realizes the mechanical stress isolation and anti-oxidation protection of the connecting wire 4 root solder joint.

[0040] Further, the protective sticker 6 is attached to the connecting wire 4 at the wire arrangement slot 16, and the two ends of the protective sticker 6 pass through the connecting wire 4 and are attached to the back of the circuit board 1.

[0041] In the design, through the cross-attached structure of the protective sticker 6, the electromagnetic shielding of the connecting flat cable 4 at the flat cable wiring groove 16 is fully covered, and a physical isolation layer is formed to prevent abnormal contact impedance caused by environmental moisture or dust invasion of the metal contact.

[0042] Further, the electromagnetic shield 5 is composed of a copper-nickel alloy inner layer and a permalloy outer layer by a hot pressing composite process, the inner surface of the electromagnetic shield 5 is provided with an array of heat-conducting silica gel protrusions, each protrusion is distributed in multiple rows and multiple columns at equal intervals, and the surface of the electromagnetic shield 5 is provided with a honeycomb-shaped opening array.

[0043] In the design, the layered structure of the electromagnetic shield 5 is formed by the combination of copper-nickel alloy and permalloy, which realizes the gradient attenuation of wide-band electromagnetic interference; the honeycomb-shaped opening array realizes the directional optimization of the internal component heat dissipation channel under the premise of ensuring the shielding effectiveness; the matrix arrangement of the heat-conducting silica gel protrusions forms a contact-type heat conduction interface, so that the heat of the key chip can be uniformly conducted to the surface of the shield.

[0044] In use, the electromagnetic shield 5 is glued at the corresponding position of the circuit board 1, which is used to shield the electromagnetic interference generated during the operation of the dynamic monitoring module 7, the driving circuit module 8 and the power supply voltage stabilizing unit 9 and assist in heat dissipation; the positioning frame 31 is glued outside the front display screen 3 of the circuit board 1, and the buffer pad 15 is glued inside the positioning frame 31, which prepares for the installation of the display screen 3; the plug-in pin 2 is installed through the reserved hole 11 on the front of the circuit board 1; the reinforcing gasket 13 is embedded in the hole 12 at the four corners of the circuit board 1.

[0045] The connecting flat cable 4 is installed at the bottom of the display screen 3, the connecting flat cable 4 is inserted into the flat cable wiring groove 16 through the reserved slot 14 at the bottom of the circuit board 1; the root welding point of the connecting flat cable 4 is fixed with adhesive tape 32; the protective sticker 6 is pasted at the flat cable wiring groove 16; the display screen 3 is placed in contact with the buffer pad 15 on the back, and the installation of the display screen 3 is completed.

[0046] The circuit board 1 is fixed on the equipment by bolts through the mounting hole 12 and the reinforcing gasket 13, and the module installation is completed.

[0047] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and it is intended to encompass all changes falling within the meaning and scope of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to which they belong.

Claims

1. A liquid crystal display module with anti-ghost flicker, comprising a circuit board (1), a display screen (3) is fixedly installed on the front surface of the circuit board (1), a dynamic monitoring module (7), a driving circuit module (8) and a power supply voltage stabilization unit (9) are fixedly installed on the back surface of the circuit board (1), characterized in that: A positioning frame (31) is glued on the circuit board (1) outside the display screen (3), the side of the positioning frame (31) away from the circuit board (1) is in the same plane as the front surface of the display screen (3), and a buffer pad (15) is glued and installed on the front surface of the circuit board (1) inside the positioning frame (31); An electromagnetic shielding cover (5) is glued and installed on the circuit board (1) outside the dynamic monitoring module (7), the driving circuit module (8) and the power supply voltage stabilization unit (9).

2. The liquid crystal display module with anti-residual image flicker according to claim 1, wherein, A reserved hole (11) is formed on the front surface of the circuit board (1), a plug-in pin (2) is installed on the circuit board (1) through the reserved hole (11), a reserved groove (14) is formed on the bottom of the circuit board (1), mounting holes (12) are formed at the four corners of the circuit board (1), and a wire arrangement wiring groove (16) is formed on the back surface of the circuit board (1).

3. A liquid crystal display module with anti-flickering feature according to claim 2, characterized in that, Grooves are formed on the circuit board (1) at the upper and lower ends of the mounting holes (12), and reinforcing washers (13) are embedded and installed in the grooves.

4. A liquid crystal display module with anti-flickering feature according to claim 1, characterized in that, A connection wire arrangement (4) is installed at the bottom of the display screen (3), one end of the connection wire arrangement (4) away from the display screen (3) passes through the reserved groove (14) and is inserted into the wire arrangement wiring groove (16), an adhesive tape (32) is attached to the front surface of the display screen (3), the adhesive tape (32) is glued to the display screen (3) and the connection wire arrangement (4), and the back surface of the display screen (3) is in contact with but not fixedly connected to the buffer pad (15) glued to the circuit board (1).

5. The liquid crystal display module according to claim 2, wherein the liquid crystal display module is a liquid crystal display module having anti-sticking and anti-flickering. A protective patch (6) is attached to the connection wire arrangement (4) at the wire arrangement wiring groove (16), and the two ends of the protective patch (6) pass through the connection wire arrangement (4) and are attached to the back surface of the circuit board (1). ​ 6. The liquid crystal display module with anti-sticking and anti-flickering according to claim 1, wherein, The electromagnetic shielding cover (5) is composed of a copper-nickel alloy inner layer and a permalloy outer layer by a hot pressing composite process, the inner surface of the electromagnetic shielding cover (5) is provided with arrayed heat-conducting silicone protrusions, each protrusion is distributed in multiple rows and multiple columns at equal intervals, and the surface of the electromagnetic shielding cover (5) is provided with a honeycomb-shaped opening array.

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