CN219266923U

CN219266923U - Touch display capable of preventing display from blackening

Info

Publication number: CN219266923U
Application number: CN202223327764.0U
Authority: CN
Inventors: 周伯霖
Original assignee: General Touch Technology Co Ltd
Current assignee: General Touch Technology Co Ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-06-27
Anticipated expiration: 2032-12-13

Abstract

The utility model discloses a touch display capable of preventing display blackening, which comprises a touch screen body, a liquid crystal panel, a front frame and a UV heat insulation film, wherein the liquid crystal panel is fixed on the inner surface of the front frame, the touch screen body is fixed on the outer surface of the front frame, the UV heat insulation film is fixed on the back surface of the touch screen body, and the UV heat insulation film covers a visible area of the touch screen body. According to the utility model, the UV heat-insulating film capable of resisting infrared rays and ultraviolet rays is used on the touch screen body, so that the temperature rising speed of liquid crystal can be effectively slowed down, an air duct between the liquid crystal panel and the touch screen body can be eliminated to reduce the overall thickness of the device, and the technical problems that the conventional touch display device is large in thickness, easy to accumulate dust and easy to blacken local liquid crystal are solved.

Description

Touch display capable of preventing display from blackening

Technical Field

The utility model relates to the technical field of touch display, in particular to a touch display capable of preventing display blackening, which is particularly suitable for outdoor use.

Background

With advances in electronic touch display technology, touch displays are increasingly used in a wide range of applications. To date, various touch-enabled displays have appeared in various corners of life, such as: self-service ordering/taking devices, self-service ticket vending machines, public inquiry service devices, etc. The application cases of the equipment in indoor scenes are more and more, the range is wider and wider, great convenience is brought to the life of people, the efficiency is greatly improved, and meanwhile, the life cost is also reduced.

With the increasing popularity of displays with touch functions, outdoor and semi-outdoor application scenes are increasingly demanded, and applications of touch displays slowly come outdoors from indoors. However, because the indoor and outdoor environments are different, the touch display is exposed to stronger ambient light and complex climatic environments in the outdoor environment, and often is displayed in an unclear manner due to too strong outdoor light, so that the use comfort of the touch display is poor.

Currently, a conventional solution is to combat intense ambient light by increasing the brightness of the liquid crystal panel. The brightness of the liquid crystal panel is generally more than 700nits, which is called as a high-brightness liquid crystal panel, but the brightness is improved, the liquid crystal panel can generate higher self-heating value, and a large amount of energy rays such as ultraviolet rays, infrared rays and the like irradiated by strong outdoor sunlight are added, so that liquid crystal molecules in the liquid crystal panel rapidly heat up under the environment, and further the deflection capability is lost due to the over-high temperature, and the phenomenon is that a black non-display area appears on a display picture at a corresponding position, commonly called as liquid crystal blackening phenomenon. Therefore, the solution to combat strong ambient light by increasing the brightness of the liquid crystal panel is less practical.

In addition, patent document with publication number CN215011033U discloses an automatic temperature-controlled display device, which comprises a front cover plate, a housing, a mounting frame, a liquid crystal panel, an air supply member, an air exhaust member, a wind shield and a housing, wherein the mounting frame is fixedly connected with the housing, the front cover plate and the liquid crystal panel are both fixed on the mounting frame, the liquid crystal panel is positioned between the front cover plate and the housing, a first ventilation layer is formed between the liquid crystal panel and the housing, and a second ventilation layer is formed between the liquid crystal panel and the front cover plate; the air supply piece and the air exhaust piece are respectively and fixedly arranged at two sides of the shell, the air inlet of the air exhaust piece is respectively communicated with the first ventilation layer and the second ventilation layer, the air outlet of the air supply piece is communicated with the second ventilation layer, and the air baffle enables the first ventilation layer to be not communicated with the air outlet of the air supply piece; the housing is fixed in the middle of the shell, and ventilation and heat dissipation holes are formed in the housing. The technology is also suitable for outdoor use, and the temperature inside the display equipment is regulated by arranging the ventilation air channels inside the display equipment respectively, so that the technology has a good temperature control effect. However, the following technical problems still exist after the applicant actually applies the technology:

1. because the air duct has a certain space distance, the thickness of the display device is increased by adopting the double-layer air duct structure, so that the display device is heavy and is not friendly to a cabinet for installing intelligent equipment.

2. Because the wind channel communicates with each other with external environment, when consequently using wind channel temperature regulation, dust, the smudge etc. in the air will enter into between front shroud (touch-sensitive screen) and the liquid crystal panel through the wind channel, and long-time use, dust smudge can pile up in the display area, not only seriously influences display effect and human-computer interaction experience, still leads to equipment damage easily.

3. When air flows in the air duct, the air cannot flow uniformly in the whole area, and the situation of local overheating still occurs under the irradiation of outdoor sunlight, which also causes local liquid crystal blackening.

For this reason, there is a need to develop new technologies for providing touch displays with better outdoor use effects.

Disclosure of Invention

The utility model aims to overcome the technical problems in the prior art and provide a touch display capable of preventing display from blackening.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a touch display for preventing display blackening, characterized by: the touch screen comprises a touch screen body, a liquid crystal panel, a front frame and a UV heat insulation film, wherein the liquid crystal panel is fixed on the inner surface of the front frame, the touch screen body is fixed on the outer surface of the front frame, the UV heat insulation film is fixed on the back surface of the touch screen body, and the UV heat insulation film covers a visible area of the touch screen body.

The UV heat insulation film is fully attached to the back surface of the touch screen body through an OCA film.

The coverage area of the UV heat insulation film exceeds the boundary of the visible area of the touch screen body by 4-6mm.

The thickness of the UV heat insulation film is 0.12-0.18mm.

The liquid crystal panel is fixed on the inner surface of the front frame through the panel frame, and a dustproof sealing strip is fixed between the liquid crystal panel and the inner surface of the front frame; the touch screen body is sealed and adhered to the outer surface of the front frame, and a sealed space is formed between the fixed touch screen body and the liquid crystal panel.

The touch display also comprises an iron disc, a rear shell, an air cooling assembly and an electronic suite, wherein the iron disc is arranged on the liquid crystal panel through a front frame fixing cover, the rear shell, the air cooling assembly and the electronic suite are all fixed on the iron disc, a cooling air channel is formed between the iron disc and the liquid crystal panel, the rear shell is arranged on the electronic suite in a covering mode, an air inlet is formed in the rear shell, and the cooling air channel is respectively communicated with the air cooling assembly and the rear shell.

The air cooling assembly is arranged on the upper part, the left side or the right side of the iron disc, the air inlet is arranged on the lower part of the rear shell, and the air cooling assembly is used for driving air to flow from bottom to top to take away heat.

The utility model has the advantages that:

1. the utility model uses the UV heat-insulating film which can resist infrared rays and ultraviolet rays on the touch screen body, compared with the patent document with the publication No. CN215011033U, the utility model is equivalent to adding the UV heat-insulating film and eliminating the air duct between the liquid crystal panel and the touch screen body, based on the structure,

on the one hand, the UV heat-insulating film can reflect infrared rays and ultraviolet rays in sunlight (the main power source for blackening liquid crystal is the infrared rays and the ultraviolet rays in the sunlight), so that the temperature inside the touch display and the temperature of the liquid crystal rise slowly, and the touch display can be used outdoors for a long time.

On the other hand, because the UV heat insulation film is uniformly attached to the back of the touch screen body, local overheating cannot occur under the irradiation of outdoor sunlight, and the technical problem of local liquid crystal blackening is effectively solved.

On the other hand, because the air duct between the liquid crystal panel and the touch screen body is canceled, the space distance between the liquid crystal panel and the touch screen body can be reduced, the overall thickness of the touch display is effectively reduced, more cabinets can be adapted, and the use is more convenient.

Furthermore, the cancellation of the air duct also ensures that dust, dirt and the like in the air cannot enter between the liquid crystal panel and the touch screen body, thereby being beneficial to preventing equipment from being damaged and enabling the equipment to always maintain the optimal display effect.

2. According to the utility model, the UV heat insulation film is fully attached to the back surface of the touch screen body by adopting the OCA film, so that the touch screen has the advantages of high bonding strength and no bubbles, the display effect is not affected, and the situation of layering and falling off caused by viscosity loss in the outdoor use process is avoided.

3. The coverage area of the UV heat-insulating film is set to be 4-6mm beyond the boundary of the visible area of the touch screen body, which is beneficial to enabling the UV heat-insulating film to achieve more comprehensive and better light reflection effect.

4. The thickness of the UV heat insulation film is set to be 0.12-0.18mm, and the UV heat insulation film has the advantages that the display effect of equipment is not affected, and a better reflection effect can be maintained, so that the purpose of effectively preventing blackening is achieved.

5. The utility model forms a sealing space between the touch screen body and the liquid crystal panel through the dustproof sealing strip and the viscose, can effectively prevent dust and other impurities from entering the space between the liquid crystal panel and the touch screen body, is beneficial to protecting equipment and keeping the best display effect, improves the dustproof grade of the equipment,

6. the utility model can forcedly dissipate heat of the liquid crystal panel and the electronic suite by utilizing the cooling structure formed by the iron disc, the rear shell and the air cooling assembly, and ensures that the working temperatures of the liquid crystal panel and the electronic suite can be kept within a required range.

7. The utility model is particularly suitable for outdoor use, but also for use indoors or in places where the ambient light is not strong.

Drawings

Fig. 1 is a schematic structural view of embodiment 1;

FIG. 2 is an enlarged schematic view of the structure at H in FIG. 1;

FIG. 3 is a schematic cross-sectional structure of embodiment 3;

fig. 4 is a schematic plan view of embodiment 3.

Marked in the figure as: 1. touch screen body 2, front bezel, 3, liquid crystal display panel, 4, panel frame, 5, UV thermal insulation film, 6, OCA film, 7, dustproof sealing strip, 8, double faced adhesive tape, 9, visible area, 10, iron plate, 11, forced air cooling subassembly, 12, backshell, 13, electron external member.

Detailed Description

Example 1

The present embodiment provides a touch display that prevents display blackening, as shown in fig. 1-2, which includes a touch screen body 1, a liquid crystal panel 3, a front frame 2, and a UV heat insulating film 5. The specific structure, connection relation and position relation of each component are as follows:

the liquid crystal panel 3 may be a Hi-TNI liquid crystal panel 3, and is fixed on the inner surface of the front frame 2.

The touch screen body 1 is fixed on the outer surface of the front frame 2 through the double faced adhesive tape 8, the outer surface of the touch screen body 1 is treated by AG technology, and the problem that display is affected due to reflection of external light can be prevented when the touch screen is used outdoors.

The UV heat insulation film 5 is fixed on the back of the touch screen body 1, and the thickness of the UV heat insulation film 5 is 0.12-0.18mm, but the thickness of the UV heat insulation film 5 is preferably 0.15mm so as to achieve better reflection effect on the premise of not affecting the display effect.

The UV heat insulating film 5 is fixed to the back surface of the touch panel body 1 and then covers the visible region 9 of the touch panel body 1. Wherein, the coverage area of the UV heat-insulating film 5 exceeds the boundary 4-6mm of the visible area 9 of the touch screen body 1, and can specifically exceed the boundary 5mm of the visible area 9. In this embodiment, the size of the UV heat insulation film 5 is set to be 4-6mm larger than the size of the visible area 9 of the touch screen body 1, which is equivalent to that the size of the UV heat insulation film 5 is 4-6mm larger than the single-side size of the visible area 9, which is beneficial to increasing the light reflection area, thereby achieving better reflection effect.

In this embodiment, the UV heat-insulating film 5 is preferably fully attached to the back surface of the touch screen body 1 by the OCA film 6, the size of the OCA film 6 is equal to the size of the UV heat-insulating film 5, and after the processes of positioning, roller extrusion, defoaming, curing, etc., the UV heat-insulating film 5 can be firmly attached to the back surface of the touch screen body 1 without air bubbles.

The front frame 2 is a conventional structure in the existing liquid crystal display device, specifically, the front frame 2 is a square frame with a hollow display area, and comprises four side connecting plates and four bottom mounting plates, wherein the four side connecting plates and the four bottom mounting plates can be integrally formed or can be made in a split manner. The hollow display area is located between four bottom mounting plates, the liquid crystal panel 3 is fixed on the inner surfaces of the four bottom mounting plates in the front frame 2, and the touch screen body 1 is fixed on the outer surfaces of the four bottom mounting plates in the front frame 2.

The assembly process of this embodiment is:

the UV heat insulation film 5 is fully attached to the touch screen body 1 through the OCA film 6, the periphery of the touch screen body 1 is sealed and adhered to the outer surface of the front frame 2 through the double faced adhesive tape 8, and then the liquid crystal panel 3 is fixed to the inner surface of the front frame 2 through screws.

The present embodiment also verifies the usage effect of the VU insulation as follows:

verification conditions: two sets of touch displays A, B of the same specification were selected, respectively, the UV heat insulating film 5 described in this embodiment was provided in the touch display a, the thickness of the UV heat insulating film 5 was 0.15mm, and the UV heat insulating film 5 was not provided in the touch display B.

The verification process comprises the following steps: the touch display A, B is simultaneously placed in front of an analog light source consisting of 8 bathroom heater lamps to be lightened for normal use, and the temperature change conditions of the central point and four corner probes inside the two touch displays are recorded as shown in the following table:

verification result: after 3 hours of experiments, the display of the touch display A is still normal, no black screen or yellowing phenomenon exists, after 1 hour, the yellowing phenomenon starts to appear at the center part and the left side of the touch display B, after 1.5 hours, black spots start to appear, and when the time is approximately 2.0 hours, the display is full-screen blackened, and no display exists. As is clear from the above-mentioned actual data, the present embodiment makes the temperature inside the touch display and the temperature of the liquid crystal rise very slowly, so that the touch display can be used outdoors for a long time, and thus the technical effect is better than the prior art.

In summary, since the UV heat-insulating film 5 capable of resisting infrared and ultraviolet is adopted in the present embodiment, not only the temperature rising speed of the liquid crystal can be effectively slowed down and the blackening of the liquid crystal can be prevented, but also the air duct between the liquid crystal panel 3 and the touch screen body 1 can be eliminated to reduce the overall thickness of the device and prevent dust from entering, thereby achieving better outdoor use effect.

Example 2

The present embodiment provides a touch display for preventing display blackening on the basis of embodiment 1, which includes a touch screen body 1, a liquid crystal panel 3, a front frame 2, and a UV heat insulating film 5, as shown in fig. 1-2. Wherein, the liquid crystal display device comprises a liquid crystal display device,

The UV heat-insulating film 5 is fixed on the back surface of the touch screen body 1, and the fixing mode is preferably to use an OCA film 6 to fully attach the UV heat-insulating film 5 on the back surface of the touch screen body 1. The UV heat insulating film 5 fixed on the back of the touch screen body 1 will cover the visible area 9 of the touch screen body 1. In order to increase the light reflection area to achieve a better reflection effect, the coverage area of the UV heat insulation film 5 is preferably set to be 4-6mm beyond the boundary of the visible area 9 of the touch screen body 1, and may specifically exceed the boundary of the visible area 9 by 5mm. Further, the thickness of the UV heat-insulating film 5 is 0.12 to 0.18mm, but in order to achieve a better reflection effect, it is preferable that the thickness of the UV heat-insulating film 5 is 0.15mm,

in order to prevent dust from entering between the touch screen body 1 and the liquid crystal panel 3, the fixing structure of the touch screen body 1, the liquid crystal panel 3 and the front frame 2 is further limited. Specifically, a panel frame 4 is disposed between the liquid crystal panel 3 and the front frame 2, the liquid crystal panel 3 is fixed on the inner surface of the front frame 2 through the panel frame 4, and a dustproof sealing strip 7 is fixed between the liquid crystal panel 3 and the inner surface of the front frame 2; the touch screen body 1 is sealed and adhered to the outer surface of the front frame 2, and a sealed space is formed between the fixed touch screen body 1 and the liquid crystal panel 3.

The assembly process of this embodiment is:

the UV heat insulation film 5 is fully attached to the touch screen body 1 through the OCA film 6, the periphery of the touch screen body 1 is sealed and adhered to the outer surface of the front frame 2 through the double faced adhesive tape 8, and then the liquid crystal panel 3 is fixed to the inner surface of the front frame 2 through screws. The gap is reserved by 1-2mm between the liquid crystal panel 3 and the inner surface of the front frame 2, and the gap is formed by cementing a dustproof sealing strip 7, as shown in fig. 2, one surface of the dustproof sealing strip 7 is attached to a metal frame of the liquid crystal panel 3, the other surface of the dustproof sealing strip is attached to the inner surface of the front frame 2, and the compression amount of the dustproof sealing strip 7 is 25% -45%, so that the whole thickness of the touch display is reduced.

Because the fixed touch screen body 1 and the liquid crystal panel 3 form a sealed space, air flow cannot enter the space between the touch screen body 1 and the liquid crystal panel 3, and the problem that dust is accumulated in the visible area 9 to influence display cannot occur.

Example 3

The touch display is further limited on the basis of embodiment 1 or embodiment 2, as shown in fig. 3-4, the touch display further includes an iron disc 10, a rear shell 12, an air cooling assembly 11 and an electronic sleeve 13, the iron disc 10 is fixed on the front frame 2 through screws, the fixed iron disc 10 is covered on the liquid crystal panel 3, the rear shell 12, the air cooling assembly 11 and the electronic sleeve 13 can be fixed on the iron disc 10 through screws, a cooling air duct is formed between the fixed iron disc 10 and the liquid crystal panel 3, the rear shell 12 is covered on the electronic sleeve 13, an air inlet communicated with the outside is arranged on the rear shell 12, and the cooling air duct is respectively communicated with the air cooling assembly 11 and the rear shell 12. Of course, a vent hole communicating with the outside may be formed in the lower portion of the iron plate 10 as needed. After the air cooling assembly 11 is started, negative pressure is generated in the equipment, so that external cold air enters the rear shell 12 and passes through the cooling air duct, and heat in the equipment is taken away.

Further, since the air will rise after being heated, the present embodiment preferably mounts the air cooling module 11 on the upper, left or right side of the iron pan 10, and the air inlet is provided on the lower portion of the rear case 12, so that the air cooling module 11 drives the air to flow from the lower to the upper to remove the heat inside the apparatus. In addition, the iron plate 10 and the rear case 12 are provided with cabinet mounting positions, and the mounting mode can be freely selected. The size of the touch screen body 1 is larger than that of the iron disc 10, so that the touch screen body can be made to be flat when being installed in a cabinet, and the cabinet can be conveniently made to be an external waterproof scheme.

It should be noted that, the iron plate 10, the rear case 12 and the electronic package 13 in the present embodiment are all conventional structures, and specific reference may be made to corresponding structures disclosed in the patent document with publication number CN215011033U, and details thereof are not repeated herein. The air cooling assembly 11 is mainly a fan and is used for controlling air flow to take away heat in the equipment.

In the embodiment, a corresponding temperature sensor can be arranged in the iron plate 10 during actual use, and when the temperature sensor detects that the temperature in the equipment is higher, the air cooling assembly 11 can be controlled to be automatically started to realize automatic cooling.

The assembly process of this embodiment is:

the UV heat insulation film 5 is fully attached to the touch screen body 1 through the OCA film 6, and the periphery of the touch screen body 1 is sealed and adhered to the outer surface of the front frame 2 by using the double faced adhesive tape 8. The liquid crystal panel 3 is fixed on the inner surface of the front frame 2 by screws, and a dustproof sealing strip 7 is arranged between the liquid crystal panel 3 and the inner surface of the front frame 2. Then the iron plate 10, the electronic suite 13, the air cooling assembly 11 and the rear shell 12 are fixed through screws. After the assembly is completed, the thickness of the whole machine can be controlled to be 50-80mm, and the whole machine has the effect of being lighter and thinner.

While the utility model has been described with reference to certain embodiments, it is understood that any feature disclosed in this specification may be replaced by alternative features serving the equivalent or similar purpose, unless expressly stated otherwise; all of the features disclosed, or all of the steps in a method or process, except for mutually exclusive features and/or steps, may be combined in any manner.

Claims

1. A touch display for preventing display blackening, characterized by: including touch-sensitive screen body (1), liquid crystal panel (3), preceding frame (2) and UV thermal-insulated membrane (5), the internal surface at preceding frame (2) is fixed in liquid crystal panel (3), the surface at preceding frame (2) is fixed in touch-sensitive screen body (1), the back at touch-sensitive screen body (1) is fixed in UV thermal-insulated membrane (5), and the visual area (9) of touch-sensitive screen body (1) are covered in UV thermal-insulated membrane (5).

2. A touch display for preventing blackening of a display according to claim 1, wherein: the UV heat insulation film (5) is fully attached to the back face of the touch screen body (1) through the OCA film (6).

3. A touch display for preventing blackening of a display according to claim 1, wherein: the coverage area of the UV heat insulation film (5) exceeds the boundary 4-6mm of the visible area (9) of the touch screen body (1).

4. A touch display for preventing blackening of a display according to claim 1, wherein: the thickness of the UV heat insulation film (5) is 0.12-0.18mm.

5. A touch display for preventing blackening of a display according to claim 1, wherein: the liquid crystal panel (3) is fixed on the inner surface of the front frame (2) through the panel frame (4), and a dustproof sealing strip (7) is fixed between the liquid crystal panel (3) and the inner surface of the front frame (2); the touch screen body (1) is sealed and adhered to the outer surface of the front frame (2), and a sealed space is formed between the fixed touch screen body (1) and the liquid crystal panel (3).

6. A touch display for preventing display blackening according to any of claims 1-5, wherein: the touch display also comprises an iron disc (10), a rear shell (12), an air cooling assembly (11) and an electronic suite (13), wherein the iron disc (10) is fixedly covered on the liquid crystal panel (3) through a front frame (2), the rear shell (12), the air cooling assembly (11) and the electronic suite (13) are all fixed on the iron disc (10), a cooling air channel is formed between the iron disc (10) and the liquid crystal panel (3), the rear shell (12) is covered on the electronic suite (13), an air inlet is formed in the rear shell (12), and the cooling air channel is respectively communicated with the air cooling assembly (11) and the rear shell (12).

7. A touch display for preventing blackening of a display according to claim 6, wherein: the air cooling assembly (11) is arranged on the upper part, the left side or the right side of the iron disc (10), the air inlet is arranged on the lower part of the rear shell (12), and the air cooling assembly (11) is used for driving air to flow from bottom to top so as to take away heat.