CN211603779U

CN211603779U - Liquid crystal reinforced display screen module with touch and heating functions and electromagnetic compatibility

Info

Publication number: CN211603779U
Application number: CN202020260018.6U
Authority: CN
Inventors: 朱恒; 潘书山; 高琼
Original assignee: Nanjing Xinweifeng Optoelectronics Technology Co ltd
Current assignee: Nanjing Xinweifeng Optoelectronics Technology Co ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-09-29
Anticipated expiration: 2030-03-05

Abstract

The utility model particularly relates to a liquid crystal reinforced display screen module with touch and heating functions and electromagnetic compatibility, which comprises a front shell and a rear cover plate connected with the front shell; the front protective glass, the liquid crystal screen module, the optical module, the heating plate, the backlight assembly and the heat dissipation plate are sequentially distributed in the front shell from outside to inside; the liquid crystal screen module comprises a touch screen, an electromagnetic shielding film and a liquid crystal screen from outside to inside in sequence; the liquid crystal display modules are fixedly connected in an optical cement attaching mode; conductive foam and conductive cloth are adhered to the outer surface and the periphery of the touch screen, so that a closed space is formed among the front protective glass, the front shell and the liquid crystal screen module; the optical module comprises a light guide plate and an optical film; the front shell and the heat dissipation plate are fixedly connected through screws. The utility model discloses a liquid crystal display module can not only guarantee that liquid crystal display has the electromagnetic compatibility function, have moreover and realize the ability of normal work through the screen heating under the lower temperature, and mechanical properties also promotes greatly.

Description

Liquid crystal reinforced display screen module with touch and heating functions and electromagnetic compatibility

Technical Field

The utility model relates to a liquid crystal display technical field, concretely relates to take touch and screen heating function and electromagnetic compatibility's liquid crystal to consolidate display module.

Background

Along with the development and innovation of science and technology, the types of electronic products are more and more, and the electronic products are widely applied to the fields of work, life, production and the like, and magnetism is generated along with the generation of electricity, so that the problem of electromagnetic compatibility is inevitable for the electronic products.

Due to electromagnetic interference in electromagnetic compatibility, performance of devices or systems in electronic products can be degraded, electromagnetic sensitivity is increased, normal operation of the electronic products is seriously affected, and even some elements in the products are damaged. Therefore, the electromagnetic compatibility of the electronic product is strengthened, so that the electronic product is free from electromagnetic interference in the surrounding environment, can work normally, and can not generate electromagnetic interference with other electronic products and the like in the surrounding environment.

A liquid crystal display substrate is a terminal device of an electronic equipment system, and electromagnetic compatibility (EMC), which is an important technology of electronic equipment, is an inevitable important problem in designing a liquid crystal display substrate. If the EMC design is not good, form the ripple or the screen flashing, influence the display picture quality, lead to the information acquisition mistake, will seriously influence the performance of equipment efficiency.

Meanwhile, due to the characteristics of liquid crystal, the liquid crystal display cannot normally display and work in a low-temperature (lower than minus 30 ℃) environment, in winter in northwest of China and some special occasions, the working environment temperature can reach minus four and fifty degrees, the liquid crystal display screen needs to be heated under the condition, the temperature of the liquid crystal display screen quickly reaches the normal working temperature range of the liquid crystal display screen, the whole display module can normally work, meanwhile, a heating device also needs to be controlled, the temperature cannot be too high, the bearing range of components is exceeded, and the display module cannot normally work due to too high temperature.

The prior art application number is: 201822082108.6, title of the invention: the utility model provides a add hot type display module assembly, discloses a add hot type display module assembly, includes the module body, and the one end of module body is provided with the touch-sensitive screen, and the other end of module body is provided with fixed metal casing, and shielding heating glass is installed to one side of touch-sensitive screen. Heating the glass by heating has a problem that the display luminance is reduced by glass attachment (the luminance is reduced by about 25% by heating the glass).

Disclosure of Invention

1. The technical problem to be solved is as follows:

to the technical problem, the utility model provides a take touch and screen heating function and electromagnetic compatibility's liquid crystal to consolidate display screen module adopts the resistance diaphragm through increasing a slice heating under optical film assembly, realizes carrying out temperature control to the display screen module.

2. The technical scheme is as follows:

the utility model provides a take touch and heating function and electromagnetic compatibility's liquid crystal to consolidate display screen module which characterized in that: the rear cover plate is connected with the front shell; the front protective glass, the liquid crystal screen module, the optical module, the heating plate, the backlight assembly and the heat dissipation plate are sequentially distributed in the front shell from outside to inside; the liquid crystal screen module comprises a touch screen, an electromagnetic shielding film and a liquid crystal screen from outside to inside in sequence; the liquid crystal display modules are fixedly connected in an optical cement attaching mode; conductive foam and conductive cloth are adhered to the outer surface and the periphery of the touch screen, so that a closed space is formed among the front protective glass, the front shell and the liquid crystal screen module; the optical module comprises a light guide plate and an optical film; the front shell and the heat dissipation plate are fixedly connected through screws.

The device also comprises a circuit control panel, a video signal conversion panel and a touch screen control panel; the circuit control panel, the video signal conversion panel and the touch screen control panel are locked on the reserved inner studs on the back of the heat dissipation plate through screws.

Furthermore, the liquid crystal display module also comprises a shielding film; the shielding film comprises a surface film surface covering the touch screen and copper foils wrapped around the liquid crystal screen module, and four sides of the shielding film are turned over by the copper foils to be guided to the outer surface of the touch screen.

Further, the model of the liquid crystal display is LCM150THB 02.

Further, an ITO film is pasted on the back of the touch screen; the sheet resistance of the ITO film is less than or equal to 8 ohms.

Further, the device also comprises a temperature sensor; the temperature sensor is arranged at the edge of the liquid crystal screen.

Furthermore, the liquid crystal display module further comprises a backlight assembly, and a backlight structure plate of the backlight assembly is connected with a preset position screw of the heat dissipation plate through a screw.

3. Has the advantages that:

(1) the utility model discloses a liquid crystal display module can not only guarantee that liquid crystal display has the electromagnetic compatibility function, have moreover and realize the ability of normal work through the screen heating under the lower temperature, and mechanical properties also promotes greatly.

(2) The utility model has the advantages of simple structure, the assembly is easy, and the later maintenance cost is lower.

Drawings

Fig. 1 is an external view of the present invention;

fig. 2 is a schematic structural diagram of the utility model.

Detailed Description

As shown in fig. 1 and 2, a liquid crystal reinforced display module with touch and heating functions and electromagnetic compatibility is characterized in that: comprises a front shell 1 and a rear cover plate 2 connected with the front shell; as shown in figure 1; the front protective glass, the liquid crystal screen module, the optical module, the heating plate 6, the backlight assembly and the heat dissipation plate 5 are sequentially distributed in the front shell from outside to inside; the liquid crystal screen module comprises a touch screen 10, an electromagnetic shielding film and a liquid crystal screen 7 from outside to inside in sequence; the liquid crystal display modules are fixedly connected in an optical cement attaching mode; conductive foam and conductive cloth are adhered to the outer surface and the periphery of the touch screen, so that a closed space is formed among the front protective glass, the front shell and the liquid crystal screen module; the optical module comprises a light guide plate 4 and an optical film; the front case 1 and the heat dissipation plate 5 are fixedly connected by screws. The concrete structure is shown in figure 2.

Furthermore, the device also comprises a circuit control panel, a video signal conversion panel and a touch screen control panel; the circuit control board, the video signal conversion board and the touch screen control board form a driving circuit board 3 which is locked on an inner stud reserved on the back of the heat dissipation plate through screws in the attached drawing.

Further, the model of the liquid crystal display is LCM150THB 02.

Further, a temperature sensor 8 is also included; the temperature sensor is arranged at the edge of the liquid crystal screen.

Further, the liquid crystal display module further comprises a backlight assembly 9, and a backlight structure plate of the backlight assembly is connected with a preset position screw of the heat dissipation plate through a screw.

The specific embodiment is as follows:

the utility model discloses in heating plate 6 that adopts is the electric heat membrane polyester piece that generates heat, presss from both sides in the middle of two polyester pieces with electrically conductive printing ink and special alloy current-carrying strip, through printing, heat seal technique preparation together, forms its specific specification, and thickness is at the resistance diaphragm about 0.3mm, sends infrared heat behind the diaphragm circular telegram and forms the heat radiation source, and operating temperature is not more than 80 ℃, so the name is again: low-temperature radiation electric heating film.

The utility model discloses in, the LCD screen module comprises touch-sensitive screen, ITO membrane (the square resistance is less than or equal to 8 omega), LCD screen. When the touch screen is installed, the ITO film is firstly pasted on the rear surface of the touch screen, four sides of the touch screen are coated by the copper foil, and then the touch screen is optically pasted with the liquid crystal screen. The substrate of the liquid crystal screen is reinforced glass, which can play a role of protective glass, and the front surface of the selected touch screen is usually atomized, so that the liquid crystal screen has a certain anti-dazzle function. When the product is assembled, the conductive adhesive tape and the conductive foam are pasted on the copper foil on the touch screen, the conductive foam is tightly attached to the front shell, the buffer effect is achieved to protect the liquid crystal screen module, full-screen ITO covering is also completed, and the electromagnetic compatibility function of the display module is achieved.

The utility model discloses a heating function is through increasing the resistance diaphragm of a slice heating (thickness about 0.3 mm) under optical film subassembly, add the heating plate behind optical film subassembly, not only can heat whole display module assembly, can also avoid the decay of the demonstration luminance that laminating heating glass brought before the LCD screen, back (heating glass can make luminance decay about 25%), the heating film single face is glued, can directly paste the bottom surface at optical film subassembly, then pass the hole site that the heating plate reserved with the electrode of heating plate and be connected to on the heating control circuit board; attaching a temperature sensor to the edge of the liquid crystal screen, connecting the temperature sensor to the circuit control board, detecting the temperature of the liquid crystal screen by the temperature sensor when the display module is started, and enabling the heating sheet to work when the temperature is lower than a set value, so that the temperature of the screen is quickly increased to the working temperature of the screen, and then starting to light the liquid crystal screen; when the temperature of the liquid crystal screen exceeds a set value, the heating sheet is closed; thereby achieving normal operation at low temperatures.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a take touch and heating function and electromagnetic compatibility's liquid crystal to consolidate display screen module which characterized in that: the rear cover plate is connected with the front shell; the front protective glass, the liquid crystal screen module, the optical module, the heating plate, the backlight assembly and the heat dissipation plate are sequentially distributed in the front shell from outside to inside; the liquid crystal screen module comprises a touch screen, an electromagnetic shielding film and a liquid crystal screen from outside to inside in sequence; the liquid crystal display modules are fixedly connected in an optical cement attaching mode; conductive foam and conductive cloth are adhered to the outer surface and the periphery of the touch screen, so that a closed space is formed among the front protective glass, the front shell and the liquid crystal screen module; the optical module comprises a light guide plate and an optical film; the front shell is fixedly connected with the heat dissipation plate through screws; the heating plate is an electrothermal film polyester heating plate;

2. The liquid crystal reinforced display screen module with touch and heating functions and electromagnetic compatibility of claim 1, wherein: the liquid crystal display module further comprises a shielding film; the shielding film comprises a surface film surface covering the touch screen and copper foils wrapped around the liquid crystal screen module, and four sides of the shielding film are turned over by the copper foils to be guided to the outer surface of the touch screen.

3. The liquid crystal reinforced display screen module with touch and heating functions and electromagnetic compatibility of claim 1, wherein: the model of the liquid crystal screen is LCM150THB 02.

4. The liquid crystal reinforced display screen module with touch and heating functions and electromagnetic compatibility of claim 1, wherein: an ITO film is pasted on the back of the touch screen; the sheet resistance of the ITO film is less than or equal to 8 ohms.

5. The liquid crystal reinforced display screen module with touch and heating functions and electromagnetic compatibility of claim 1, wherein: the device also comprises a temperature sensor; the temperature sensor is arranged at the edge of the liquid crystal screen.

6. The liquid crystal reinforced display screen module with touch and heating functions and electromagnetic compatibility of claim 1, wherein: the liquid crystal display module further comprises a backlight assembly, and a backlight structural plate of the backlight assembly is connected with a preset position screw of the heat dissipation plate through a screw.