KR102486557B1 - Touch screen device with air circulation function - Google Patents

Abstract

The present invention relates to an improved air circulation touch screen device which prevents blackening and reduces power loss by forcibly circulating heat inside the touch screen device panel so that it does not stagnate. The invention provides an air circulation touch screen device, comprising: a touch panel; an LCD device installed behind the touch panel; a liquid crystal panel assembly disposed in front of the LCD device; an LCD device bracket for fixing and supporting the LCD device; and at least one heat flow fan installed at the rear of the liquid crystal panel assembly to force heat to flow between the touch panel and the liquid crystal panel assembly, wherein a heat flow space is formed between the touch panel and the liquid crystal panel assembly.

Description

Air circulation touch screen device {TOUCH SCREEN DEVICE WITH AIR CIRCULATION FUNCTION}

The present invention relates to a touch screen device, and more particularly, to a touch screen device improved to prevent blackening and reduce power loss by forcibly circulating heat inside the panel of the touch screen device so as not to stagnate.

An electric vehicle includes a high-voltage battery and a motor as driving means, and power from the battery is supplied to the motor so that the motor rotates the wheels to move forward or backward.

Such an electric vehicle is environmentally friendly because it does not generate pollutants, and its maintenance cost is very low compared to an internal combustion engine vehicle as long as the battery is continuously charged.

In recent years, charging infrastructure has been gradually expanded in line with the increase in electric vehicles.

A charging kiosk for charging an electric vehicle is installed, for example, in a parking lot of a public building or a park, a rest area on a highway, or an apartment complex.

However, the conventional electric vehicle charging kiosk has a problem in that the backlight unit of the LCD (Liquid Crystal Display) or touch screen device is always turned on (ON) even when not in use, so power consumption is large. .

In addition, since the electric vehicle charging kiosk is mainly installed outdoors, a so-called blackout phenomenon occurs in which the liquid crystal panel assembly of the LCD or touch screen device is exposed to strong sunlight for a long time and the touch screen device is easily damaged. there was a problem with

More specifically, the LCD panel, which has a temperature limit due to its operating characteristics, loses its characteristics in a high-temperature environment such as in summer, and temporarily shows an abnormal state called blackening.

For example, assuming that the operating temperature of the LCD is -20 to 70℃, there is no problem at -20℃ or lower, but when direct sunlight (ultraviolet rays) is applied to the LCD surface due to the influence of strong sunlight in summer, the LCD surface temperature exceeds 70℃. When this happens, the liquid crystal of the LCD hardens and turns black.

After that, the influence of sunlight is reduced and the liquid crystal returns to its original state when the temperature of the LCD surface drops below 70°C.

However, if the LCD is continuously exposed to too strong sunlight, the LCD cell may melt and not recover to its original state.

In the case of a touch screen device, when heat is stagnant between the LCD panel and the touch panel, the blackening phenomenon occurs due to the stagnant heat.

1. Registered Patent No. 10-1021618 (registered on March 04, 2011) 2. Patent Publication No. 10-2008-0085593 (published on September 24, 2008)

The present invention has been created to solve the above problems, and an object of the present invention is to provide a touch screen device that reduces power loss and prevents blackout from occurring.

The touch screen device of the present invention for achieving the above object,

a touch panel;

an LCD device installed behind the touch panel;

a liquid crystal panel assembly disposed in front of the LCD device;

an LCD device bracket for fixing and supporting the LCD device;

At least one heat flow fan installed at the rear of the liquid crystal panel assembly to forcibly circulate heat between the touch panel and the liquid crystal panel assembly; including,

It is characterized in that a heat flow space is formed between the touch panel and the liquid crystal panel assembly.

In the present invention, a plurality of heat flow holes are formed in the bracket of the LCD device so that the heat can be forcedly circulated.

In the present invention, the heat flow fan is fixedly installed to the LCD device bracket.

In the present invention, an anti-reflection coating layer (AR) is formed on the front surface of the touch panel to prevent anti-glare.

In the present invention, the interval of the heat flow space is preferably 3 to 10 mm.

In the present invention, one side of the touch screen device is provided with a LiDAR sensor for generating a detection signal for detecting an object entering or exiting the touch screen device, which is installed on a bracket of the touch screen device. it is desirable

According to an embodiment of the present invention, blackening can be prevented by allowing heat between the touch panel and the liquid crystal panel assembly to flow without being stagnant inside the touch screen device.

In addition, by installing a lidar sensor on the touch screen device, the touch screen device is turned on when an object, for example, a person or a vehicle such as an electric vehicle, approaches, and the operation is turned off otherwise, consumption can be reduced.

In addition, by forming the AR coating layer on the front surface of the touch panel, shine due to diffuse reflection of sunlight is suppressed to increase visibility, and luminance of the touch screen device can be improved.

1 is a front view showing the front configuration of a kiosk for charging an electric vehicle to which a touch screen device according to the present invention is applied;
2 is a cross-sectional view of the touch screen device of FIG. 1;
Figure 3 is a detailed cross-sectional view showing the configuration of the main part of Figure 2 in more detail for the operation description of the touch screen device according to the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view showing the front configuration of a kiosk for charging an electric vehicle to which a touch screen device according to the present invention is applied.

2 is a cross-sectional view of the touch screen device of FIG. 1 .

FIG. 3 is a detailed cross-sectional view showing the configuration of the main part of FIG. 2 in more detail for explaining the operation of the touch screen device according to the present invention.

1 to 3, first, the electric vehicle charging kiosk 10 to which the touch screen device 100 according to the present invention is applied is, as shown in FIG. 1, a housing fixed vertically to the ground ) 12, a touch panel 165 and an LCD device 120 disposed on the front surface of the housing 12, and a LiDAR sensor installed on the upper front surface of the housing 12 170, a payment unit 16, a power line 18, and a controller 69.

Also, the LCD device 120 visually provides information required for use and management or information about the current state of the kiosk 10 to users and managers of the kiosk 10 for charging electric vehicles.

In addition, the touch panel 165 is disposed in front of the LCD device 120 to overlap with the LCD device 120, and is an input means capable of inputting information on a charging order through a user's touch.

In addition, the payment unit 16 is a credit card payment terminal means for paying a usage fee corresponding to the amount of electric power charged in the electric vehicle, for example, a card information input module (not shown) that inserts or swipes a user's credit card. ).

Also, the power line 18 is a power line having a connector 19 at its front end. The user can charge the connector 19 by holding the connector 19 and inserting it into a charging terminal provided in the electric vehicle.

In addition, the lidar sensor 170 is a sensor that detects, for example, a person or a car approaching in a non-contact manner, and is located in a peripheral area of the kiosk 10, more specifically, a peripheral area of the touch panel 165. When an object is approaching, it generates a detection signal that detects it.

The controller 69 controls the operation of the LCD device 120, the touch panel 165, the lidar sensor 170, and the payment unit 16, and may include a microcomputer.

FIG. 2 is a cross-sectional view of the touch screen device of FIG. 1 , and FIG. 3 is a detailed cross-sectional view illustrating the operation of the touch screen device of FIG. 2 .

2 and 3, the LCD device 120 includes a liquid crystal panel assembly 130, a backlight unit 150 disposed behind the liquid crystal panel assembly 130, and the liquid crystal panel assembly ( 130) and an LCD device bracket 121 for fixing and supporting the backlight unit 150.

An anti-reflection coating layer (AR) coating layer 165a is formed on the front surface of the touch panel 165 to prevent anti-glare.

By forming the AR coating layer 165a, reflection of external light generated on the surface of the touch panel 165 is prevented. That is, the AR coating layer 165a suppresses reflection of light incident on the front surface of the touch panel 165 .

The AR coating layer 165a lowers the reflectance of light from the outside, thereby suppressing glare due to diffuse reflection of sunlight on the front of the touch panel 165, increasing visibility, and further improving luminance on the front of the LCD device 120. .

In addition, the backlight unit 150 includes a light guide plate 151 disposed at the rear of the liquid crystal panel assembly 130 to face the liquid crystal panel assembly 130, and a plurality of LEDs arranged along the side of the light guide plate 151 ( A light emitting diode (163) is provided.

The light guide plate 151 is a rectangular plate-shaped member and may be formed of, for example, transparent plastic such as transparent acrylic.

In addition, the bracket rear plate part 122 of the LCD device bracket 121 may face the rear surface of the light guide plate 151 and support it. A mirror surface may be formed on the front surface of the bracket rear plate part 122 facing the rear surface of the light guide plate 151 .

Also, the plurality of LEDs 163 are fixedly supported by the LED bracket 160 . The LED bracket 160 includes a circuit board (PCB) on which a plurality of LEDs 163 are mounted.

In addition, since the plurality of high-brightness LEDs 163 are disposed so that bright light of 1500 cd (candela) or more is projected to the front of the backlight unit 150, the heat generation amount of the plurality of LEDs 163 is quite large.

Therefore, it is preferable that the LED bracket 160 is made of a metal material such as, for example, an aluminum alloy so that heat is not accumulated in the LED bracket 160 and can be smoothly dissipated.

The LED mounting circuit board (PCB) provided in the LED bracket 160 may also be made of a metal material such as, for example, an aluminum alloy.

In addition, a plurality of LEDs 163 fixedly supported by the LED bracket 160 are connected to each other in a parallel circuit. This is because when the plurality of LEDs 163 are connected in a series circuit, the resistance value of the circuit becomes higher than when the plurality of LEDs 163 are connected in a parallel circuit, so that the amount of heat generated becomes higher.

Further, the light guide plate 151 functions to refract and guide the light coming from the plurality of LEDs 163 through the side surface of the light guide plate 151 toward the liquid crystal panel assembly 130 .

The light guide plate 151 is disposed in parallel with the liquid crystal panel assembly 130, and light entering the rectangular plate-shaped light guide plate 151 through the side surface is refracted and passes through the front surface of the light guide plate 151 to the front. projected into

In addition, the lidar sensor 170 detects a corresponding detection signal when an object (vehicle or person) enters the area around the touch panel 165, more precisely, the area around the lidar sensor 170 and the object exists. generate

The lidar sensor 170 generates a detection signal corresponding to the object moving out of the area around the touch panel 165 and disappearing from the area around the touch panel 165 .

In addition, the controller 69 determines that there is no object in the area around the touch panel 165 through the object non-existence detection signal generated by the lidar sensor 170 while the plurality of LEDs 163 are turned on. If it is determined, the plurality of LEDs 163 are turned off.

In addition, the controller 69 may turn off the plurality of LEDs 163 as soon as it is determined that there is no object in the area around the touch panel 165, or after a preset time such as 3 seconds or 5 seconds has passed. Afterwards, the plurality of LEDs 163 may be turned off.

When the plurality of LEDs 163 are turned off, the front surface of the LCD device 120 appears opaque.

Meanwhile, the controller 69 determines that an object exists in the area around the touch panel 165 through an object presence detection signal generated by the lidar sensor 170 while the plurality of LEDs 163 are turned off. If so, the plurality of LEDs 163 are turned on.

Further, the controller 69 may turn off the plurality of LEDs 163 as soon as it is determined that an object exists in the area around the touch panel 165, or after a preset time such as 1 second or 3 seconds has elapsed. The plurality of LEDs 163 may be turned on.

The electric vehicle charging kiosk 10 detects the approach of an object through the detection signal of the lidar sensor 170 and the LCD device 120 only when the object exists in the area around the lidar sensor 170 The backlight unit 150 of the LCD device 120 is turned on, and when an object does not exist around the kiosk 10 , the backlight unit 150 of the LCD device 120 is turned off.

Therefore, power for the operation of the electric vehicle charging kiosk 10 is reduced.

In addition, when the controller 69 determines that there is no object entering the area around the touch panel 165 and turns off the plurality of LEDs 163, the liquid crystal panel of the liquid crystal panel assembly 130, touch The panel 165, the payment unit 16, the lidar sensor 170, and a micom (not shown) are not turned off.

In other words, the system of the electric vehicle charging kiosk 10 is maintained in an ON state.

Therefore, when an object entered by the lidar sensor 170 is detected, the system is not rebooted, so that the user can use the kiosk 10 while displaying information on the LCD device 120 in a short time. By returning to the present state, the actual power saving effect is also greater.

On the other hand, on the contrary, the controller 69 turns on / off (ON / OFF) the plurality of LEDs 163 based on the detection signal of the lidar sensor 170, and another configuration that operates by power supply. For example, the liquid crystal panel of the liquid crystal panel assembly 130, the touch panel 165, the payment unit 16, or a microcomputer also tunes to the ON/OFF of the plurality of LEDs 163 It can be additionally turned on/off.

Even in this case, the lidar sensor 170 must be turned on so as to continuously detect an object.

The touch panel 165 is fixedly supported by the touch panel bracket 166, and the touch panel bracket 166 surrounds the bracket edge 123 of the LCD device bracket 121. The LCD device 120 may be inserted into and fixed to the touch panel bracket 166.

The touch panel bracket 166 is coupled and fixed to the housing 12 of the kiosk 10 so that the touch panel 165 and the LCD device 120 are fixed to the housing 12 .

However, unlike shown in FIG. 2 , the touch panel bracket 166 and the LCD device bracket 121 may be integrally formed.

Therefore, the lidar sensor 170 is preferably installed on the bracket of the touch screen device 100, that is, the touch panel bracket 166, for compatibility with the touch screen device 100.

In addition, the rear surface of the touch panel 165 and the front surface of the liquid crystal panel assembly 130 are spaced apart at intervals of 3 to 10 mm, and a heat (or A heat flow space (S) in which heated air) is forcedly circulated (AF: Heat Air Flow) is formed.

As shown in FIG. 2 , a spacer 167 may be interposed between the touch panel 165 and the liquid crystal panel assembly 130 so that the above distance and the heat flow space S are maintained.

The spacer 167 may be formed as a part of the touch panel bracket 166 .

On the other hand, when the size (or width) of the gap of the heat flow space S is smaller than 3 mm, during the day or summer when sunlight is strong, heat energy is applied to the touch panel 165 and the liquid crystal panel assembly 130. Damage such as hardening of the liquid crystal of the liquid crystal panel assembly 130 may occur because the heat is not properly dissipated.

As a result, a blackening phenomenon in which a screen corresponding to an electric signal is not displayed on the front surface of the LCD device 120 may occur, and durability of the LCD device 120 may be deteriorated.

On the other hand, if the size of the above-mentioned gap is greater than 10 mm, the touch panel 165 is excessive because the user or administrator habitually touches the touch panel 165 while pressing it toward the rear liquid crystal panel assembly 130 when touching the touch panel 165. As a result, permanent deformation of the touch panel 165, so-called sagging or breakage, may easily occur.

As a result, durability of the touch panel 165 may deteriorate.

In addition, in the rear of the liquid crystal panel assembly 130 of the touch screen device 100 according to the present invention, the heat in the heat flow space S between the liquid crystal panel assembly 130 and the touch panel 165 does not stagnate and the forced circulation flow At least one heat flow fan 190 for forcibly circulating and flowing the heat is installed to prevent the blackening phenomenon.

In addition, the heat flow fan 190 may be installed in any method as long as the heat in the heat flow space S between the liquid crystal panel assembly 130 and the touch panel 165 can flow forcibly without being stagnant. .

As an embodiment of the present invention, as shown in FIGS. 2 and 3 , the thermal flow fan 190 may be installed on the LCD device bracket 121 .

In addition, a plurality of heat flow holes 181 are formed in the LCD device bracket 121 so that heat can flow by the heat flow fan 190 .

The number of formed heat flow holes 181 is not limited, and the LCD device bracket 121 does not become structurally weak.

In this way, by installing the heat flow fan 190 and the heat flow hole 181 in the touch screen device 100 according to the present invention, the heat between the touch panel 165 and the liquid crystal panel assembly 130 is not stagnant and is continuously As a result of the flow, the temperature between the touch panel 165 and the liquid crystal panel assembly 130 drops, so that the blackening phenomenon does not occur or can be significantly reduced.

In this way, by lowering the temperature of the touch screen device 100 and the occurrence of blackening by the heat flow fan 190, the problem of the touch screen device 100 not being operated due to heat may be prevented.

On the other hand, it is generally known that a blackening phenomenon occurs when the touch screen device receives sunlight and the temperature of the touch panel 165 rises by about 80 to 90 ° C or more, and usually, the surface temperature of the touch panel 165 is 75 ° C or more. In this case, the operation of the touch screen device becomes impossible.

As described above, the present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, and those skilled in the art can make various modifications and equivalent embodiments therefrom. will understand

Therefore, the true protection scope of the present invention should be defined only by the appended claims.

10. Kiosk
100. Touch screen devices
120. LCD device
130. Liquid crystal panel assembly
150. Backlight unit
151. Light guide plate
163. LEDs
165. Touch panel
170. lidar sensor
181. Thermal Fluid
190. Thermal fluid fan

Claims (7)

a touch panel 165;
an LCD device 120 installed behind the touch panel 165;
a liquid crystal panel assembly 130 disposed in front of the LCD device 120;
an LCD device bracket 121 for fixing and supporting the LCD device 120;
Including,
A heat flow space (S) is formed between the touch panel 165 and the liquid crystal panel assembly 130,
The interval of the heat flow space (S) is 3 to 10 mm,
A spacer 167 is interposed between the touch panel 165 and the liquid crystal panel assembly 130 to maintain the distance and the heat flow space S,
A plurality of heat flow holes 181 are formed in the LCD device bracket 121 so that heat in the heat flow space S can be forcedly circulated and flowed.
The air circulation touch screen device, characterized in that the thermal flow fan (190) is fixedly installed to the LCD device bracket (121). delete delete According to claim 1,
An air circulation touch screen device, characterized in that an anti-reflection coating layer (165a) is formed on the front surface of the touch panel (165) to prevent anti-glare. delete According to claim 1,
Air circulation touch screen device, characterized in that one side of the touch screen device is provided with a LiDAR sensor (LiDAR sensor) 170 for generating a detection signal for detecting an object entering or exiting the periphery of the touch screen device. According to claim 6,
The lidar sensor 170 is an air circulation touch screen device, characterized in that installed in the touch panel bracket 166 of the touch screen device 100.

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