KR102329501B1 - Display device with non-contact touch screen - Google Patents

Abstract

The present invention relates to a display device with a non-contact touchscreen, which enables touch recognition without physical contact. The display device with a non-contact touchscreen comprises: a display panel on which an input image is displayed; a frame which defines a non-contact touchscreen on a screen of the display panel; and a housing in which the display panel and the frame are disposed and which has an open surface through which the non-contact touchscreen and the display panel are exposed. The frame includes multiple infrared light-emitting elements, multiple infrared light-receiving elements, and one or more diode lasers. The diode laser irradiates a video alert beam that forms a visible light spot on an object on the non-contact touchscreen to the non-contact touchscreen. A beam conversion lens is disposed in front of a light-emitting surface of the diode laser. Light generated from the diode laser is converted into a planar light source including diffused light and straight light passing through a curved surface of the beam conversion lens and irradiated to the non-contact touchscreen.

Description

DISPLAY DEVICE WITH NON-CONTACT TOUCH SCREEN

The present invention relates to a display device having a non-contact touch screen.

The display device may be connected to various user interfaces. As an example of a typical user interface, a touch screen is employed on a screen of a display panel. The touch screen may be implemented as a pressure-sensitive touch screen, a capacitive touch screen, an infrared touch screen, or the like.

The touch screen is in contact with a user or a stylus pen to recognize a user input. However, such a touch screen is vulnerable to the spread of a recent new infectious disease, for example, coronavirus infection. Although the glass surface of the touch screen can be disinfected frequently, there are many difficulties in management. Although there is a non-contact touch sensor, it may come into contact with the touch sensor due to a user's touch habit.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned needs and/or problems.

In particular, the present invention provides a display device having a non-contact touch screen capable of performing a touch input in a non-contact state and preventing a finger or a pen from coming into contact with the touch screen or the screen of the display device.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

A display device according to an embodiment of the present invention includes a display panel on which an input image is displayed; a frame defining a non-contact touch screen on the screen of the display panel; and a housing in which the display panel and the frame are disposed and having an open surface through which the non-contact touch screen and the display panel are exposed.

The frame includes a plurality of infrared light emitting elements, a plurality of infrared light receiving elements, and one or more diode lasers.

The non-contact touch screen is defined by the inner space of the frame.

The frame is disposed within the housing to be spaced apart from the screen of the display panel.

The diode laser irradiates a video alert beam that forms a visible light spot on an object on the non-contact touch screen to the non-contact touch screen.
A beam conversion lens is disposed in front of the light emitting surface of the diode laser.
The non-contact touch screen is defined by the inner space of the frame.
The frame is disposed inside the housing to be spaced apart from the screen of the display panel.
The light generated from the diode laser is converted into a planar light source including straight light and diffused light passing through the curved surface of the beam conversion lens, and is irradiated to the non-contact touch screen.

The present invention enables touch recognition without physical contact by realizing a non-contact touch screen spaced apart by a predetermined distance on the screen of the display panel.

The present invention outputs a video or audio alarm signal when an object, such as a finger or a pen, is in a position capable of recognizing a touch on the non-contact touch screen to inform the user that touch recognition is possible on the non-contact touch screen so that the object does not come into contact with the display panel. Alerts can be given to users in advance.

According to the present invention, a video or audio signal is output after a touch is sensed on a non-contact touch screen to prevent an object from being pushed deeper toward the display panel after the touch is recognized.

According to the present invention, when the object approaches the display panel through the non-contact touch screen, the display panel is retracted to maintain the distance between the object and the display panel greater than or equal to a threshold value, thereby preventing the display panel from coming into contact with the object.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a block diagram illustrating a display device according to an embodiment of the present invention.
2 is a diagram illustrating a user interface control method according to an embodiment of the present invention.
3 is a view showing infrared rays irradiated on a non-contact touch screen.
4A and 4B are diagrams illustrating a video alerting apparatus according to a first embodiment of the present invention.
5 is a view showing an example of a lens disposed in front of a light emitting surface of a diode laser.
6A and 6B are diagrams illustrating a video alerting apparatus according to a second embodiment of the present invention.
7A and 7B are diagrams illustrating a video alerting apparatus according to a third embodiment of the present invention.
8A and 8B are diagrams illustrating a video alerting apparatus according to a fourth embodiment of the present invention.
9A and 9B are diagrams illustrating a video alerting apparatus according to a fifth embodiment of the present invention.
10 is a diagram illustrating an example of an audio alert device.
11A and 11B are perspective views illustrating a housing having a foreign material discharging structure.
12 is a view showing an example in which foreign substances in the housing are removed through the foreign substances outlet disposed on the sidewall of the housing.
13A and 13B are views illustrating a lifting device of a display panel.
14 is a diagram illustrating an example of a beam conversion lens.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. The present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, only the embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains It is provided to fully understand the scope of the invention, and the present invention is only defined by the scope of the claims.

Since the shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are exemplary, the present invention is not limited to the matters shown in the drawings. Like reference numerals refer to substantially like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

When "includes", "includes", "having", "consisting of", etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, it may be construed as the plural unless specifically stated otherwise.

In interpreting the components, it is interpreted as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship between two components is described as 'on One or more other elements may be interposed between those elements in which 'directly' or 'directly' are not used.

1st, 2nd, etc. may be used to distinguish the components, but the functions or structures of these components are not limited to the ordinal number or component name attached to the front of the component.

The following embodiments can be partially or wholly combined or combined with each other, and technically various interlocking and driving are possible. Each of the embodiments may be implemented independently of each other or may be implemented together in a related relationship.

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

1 is a block diagram illustrating a display device according to an embodiment of the present invention.

Referring to FIG. 1 , a display device according to an embodiment of the present invention includes a display panel 100 , a non-contact touch screen (UCS) disposed on a screen of the display panel 100 , and pixels of the display panel 100 . Display panel driving units 110 and 120 for writing data DATA, non-contact touch screen driving unit 140 driving a non-contact touch screen, first and second alarm units 150 and 160 , and host system 200 , etc. includes [DAL] The contactless touch screen (UCS) picture is not shown in Figure 1.

The display device further includes a timing controller 130 for controlling the display panel drivers 110 and 120 .

The display panel 100 is a display panel such as a liquid crystal display device (LCD), a plasma display panel (PDP), an electroluminescence display device, and an electrophoretic display device (EPD). can be implemented.

The screen AA of the display panel 100 includes a pixel array that displays input pixel data DATA on an xy plane. The pixel data DATA includes image information. The pixel array has a matrix shape defined by a plurality of data lines DL, a plurality of gate lines GL crossing the data lines DL, and the data lines DL and the gate lines GL. It includes pixels P arranged as . Each of the pixels P may be divided into a red sub-pixel, a green sub-pixel, and a blue sub-pixel for color implementation. Each of the pixels P may further include a white sub-pixel.

The display panel drivers 110 and 120 write the pixel data DATA into the sub-pixels 101 to reproduce an input image on the screen of the display panel 100 . The display panel driver includes a data driver 110 and a gate driver 120 .

The data driver 110 converts the pixel data DATA received as digital data into a gamma compensation voltage using a digital-to-analog converter (hereinafter referred to as "DAC") and outputs a data voltage. The data voltage is applied to the pixels P through the data lines DL.

The gate driver 120 outputs a gate signal (or scan signal) synchronized with the data voltage to the gate lines GL under the control of the timing controller 130 . The gate driver 120 may sequentially supply the gate signals to the gate lines GL by shifting the gate signals using a shift register.

The timing controller 130 receives the pixel data DATA and the timing signals V, H, and CLK synchronized with the pixel data DATA from the host system 200. The timing signals are the vertical synchronization signals Vsync and V , horizontal synchronization signals Hsync, H, clock CLK, etc. The timing controller 130 transmits the pixel data DATA received from the host system 200 to the data driver 110 and transmits the timing signal. Based on this, the data driver 110 and the gate driver 120 are synchronized.

The non-contact touch screen UCS includes a plurality of infrared light emitting elements LE that irradiate infrared rays to the virtual non-contact touch screen USC, and a plurality of light receiving elements RE that receive infrared rays. include A non-contact touch screen (UCS) recognizes a non-contact object, such as a user's finger or pen, which blocks infrared rays (IR) on a non-contact surface of an xy plane. It should be noted that the non-contact touch screen (USC) has no optical waveguide, no physical touch surface. For example, there is no contactable medium such as a glass substrate or a plastic substrate on the xy plane of the non-contact touch screen (USC). Accordingly, the non-contact object can pass through the non-contact touch screen USC without any resistance.

The light receiving elements RE of the non-contact touch screen UCS generate a current according to the amount of received infrared light, convert the current into a voltage, and amplify the current. When the infrared rays IP are blocked by the object, the output of the light receiving element RE is reduced.

The non-contact touch screen driver 140 applies a driving signal to the infrared light emitting elements LE to turn on the infrared light emitting elements LE. The non-contact touch screen driver 140 converts the voltage output from the light receiving elements RE into digital data through an analog-to-digital converter (ADC). The non-contact touch screen driving unit 140 analyzes the digital data obtained from the light receiving elements RE and transmits the position government of the object that blocks infrared rays (IR) on the non-contact touch screen (UCS), that is, the non-contact coordinate signal (Txy) to the host system. (200).

The non-contact touch screen (UCS) may further include a beam diode laser (VLS) for video alerting. The diode laser VLS is driven by the first alarm unit 150 to emit light when an object is recognized on the non-contact touch screen UCS. A beam (beam for VB video alert) emitted from a diode laser (VLS) is irradiated onto the xy plane of the non-contact touch screen (UCS). The beam emitted from the diode laser VLS forms a visible light spot on the non-contact object on the non-contact touch screen 410 to inform the user that touch is being recognized. The diode laser VLS may be implemented as a commercially available laser point, but is not limited thereto. On the other hand, the light receiving elements RE may include a filter that blocks the wavelength of light emitted from the diode laser VLS and passes the infrared wavelength, so that only infrared rays (IR) from the infrared light emitting elements can be converted into electrical signals. .

The light-emitting element RE, the diode laser VLS, and the light-receiving elements are arranged in a frame defining a non-contact touch screen as shown in FIGS. 4A to 10 and the like.

The host system 200 transmits the pixel data DATA from the video source to the timing controller 130 together with the timing signal. The host system 200 recognizes an object on the non-contact touch screen (UCS) in response to the non-contact coordinate signal Txy received from the non-contact touch screen driver 140 to process or apply a user input indicated by the coordinate information of the object. Run the program.

The host system 200 enables at least one of the first and second alarm units 150 and 160 when a non-contact object is recognized on the non-contact touch screen USC in response to the non-contact coordinate signal Txy. do.

The first alarm unit 150 drives the diode laser VLS in response to the enable signal from the host system 200 to output the video alarm signal in the form of a beam on the non-contact touch screen UCS. The video alarm signal is output as a beam for video alarm. The first alarm unit 150 may receive the video alarm signal received together with the enable signal to drive the diode laser VLS or drive the diode laser VLS with the video alarm signal previously stored in the internal memory.

The video alert signal may be a non-flashing signal or a flashing signal. When a non-contact object such as a user's finger or pen passes through a non-contact touch screen (USC), a video alert beam is irradiated to the non-contact object and light is reflected from the non-contact object. Accordingly, the user may know through visible light that the non-contact object is recognized on the non-contact touch screen USC.

In another embodiment, the first alarm unit 150 may be separated from the host system 200 and driven independently. For example, the first alarm unit 150 may turn on the diode laser VLS when an object is detected on the non-contact touch screen UCS using a commercially available sensor such as a motion sensor or a distance measuring sensor.

The first alarm unit 150 may be independently driven without interworking with the host system 200 or the sensor to turn on the invisible light emitting device (VLS). In this case, during the non-contact touch screen driver 140 when power is input to the display device, the invisible light emitting device VLS may continuously or at a predetermined time interval blink.

The second alarm unit 160 may input an audio alarm signal to the speaker SP in response to an enable signal from the host system 200 and output the audio alarm signal as a sound. The second alarm unit 160 may receive an audio alarm signal received together with the enable signal and output it to the speaker SP or output an audio alarm signal previously stored in the built-in memory to the speaker SP. The audio alert signal may include a preset sound effect or message. For example, the audio information signal may include a message such as "a touch is being recognized". Accordingly, the user may know through a sound or voice message that the non-contact object is recognized on the non-contact touch screen USC.

The speaker SP may be a separate speaker separated from the display panel 100 or a speaker coupled on the display panel 100 . A speaker coupled to the display panel 100 may cause the display panel 100 to vibrate according to an audio alarm signal, so that a sound is output to the front of the display panel 100 . When a plurality of speakers are coupled to the display panel 100 , a sound may be output from a speaker closest to the non-contact object. In this case, when the non-contact object moves on the non-contact touch screen UCS, the sound output position may be moved along the moving direction of the non-contact object.

In another embodiment, the second alarm unit 160 may be separated from the host system 200 and driven independently. For example, the second alarm unit 160 may output an audio alarm signal through the speaker SP when an object is detected on the non-contact touch screen UCS through a sensor such as a motion sensor or a distance measuring sensor.

2 is a diagram illustrating a user interface control method according to an embodiment of the present invention. 3 is a view showing infrared rays irradiated on a non-contact touch screen.

2 and 3 , the present invention includes a frame 300 defining a non-contact touch screen (UCS). The frame 300 may be a rectangular frame in which a long-axis frame and a short-axis frame are combined, but is not limited thereto. The non-contact touch screen (UCS) defined by the frame 300 is empty without a medium being physically contacted. The infrared light emitting elements LE may be disposed on a long side and a short side of the frame 300 . The infrared light receiving elements RE may be disposed on long sides and short sides of the frame 300 such that the light receiving surfaces thereof face the infrared light emitting elements LE.

The present invention detects a non-contact object by irradiating infrared (IR) on the non-contact touch screen (UCS) (S1).

When a non-contact object is detected on the non-contact touch screen driver 140 , the non-contact touch screen driving unit 140 calculates the coordinate S of the non-contact object and outputs a non-contact coordinate signal ( S2 ).

The first and second alarm units 150 and 160 output a video/audio alarm signal when a non-contact object is detected on the non-contact touch screen UCS (S3). At this time, either one of the video/audio alarm signal may be output or both alarm signals may be output simultaneously.

In another embodiment, the diode laser VLS may maintain a lit state regardless of whether an object is detected on the non-contact touch screen UCS to irradiate the beam VB for video alert to the non-contact touch screen UCS. In another embodiment, when an object is detected on the non-contact touch screen using a sensor, the diode laser VLS may be turned on regardless of the coordinate signal output.

4A and 4B are diagrams illustrating a video alerting apparatus according to a first embodiment of the present invention. 4A is a top plan view of the frame 300 as viewed from above. 4B is a plan view of the non-contact touch screen and the display panel as viewed from the side.

4A and 4B , infrared light emitting elements LE and infrared light receiving elements RE may be disposed on the upper surface of the frame 300 . One diode laser VLS may be disposed on the lower surface of the frame 300 . A lower surface of the frame 300 faces the screen AA of the display panel 100 . Since the diode laser VLS is closer to the display panel 100 , the diode laser VLS may be turned on after a touch is recognized by infrared rays on the non-contact touch screen UCS.

The frame 300 is spaced apart from the display panel 100 by a predetermined distance D. The distance D may be set to an appropriate distance that does not come into contact with the display panel 100 when a user's finger or pen enters deeper beyond the non-contact touch screen UCS. For example, the distance D may be set to a distance between several cm and several tens of cm.

In the example of FIG. 4A , one diode laser VLS is disposed in the central portion of one side of the short side of the frame 300 . A video warning beam VB emitted from one diode laser VLS is irradiated in the form of a surface light source on the non-contact touch screen UCS through the beam conversion lens CL shown in FIG. 5 . The beam conversion lens CL converts the light irradiated from the diode laser VLS into a linear light source and converts the linear light source into a planar light source to evenly irradiate the beam in the form of a surface light source on the xy plane of the non-contact touch screen UCS. The video alert beam VB is not used for recognizing touch coordinates, and informs the user that a touch input is being made on a virtual non-contact touch screen UCS through a visible light signal.

6A and 6B are diagrams illustrating a video alerting apparatus according to a second embodiment of the present invention. 6A is a top plan view of the frame 300 as viewed from above. 6B is a bottom plan view of the frame 300 as viewed from below.

6A and 6B , infrared light emitting elements LE and infrared light receiving elements RE may be disposed on the upper surface of the frame 300 . Two diode lasers VLS1 and VLS2 may be disposed on the lower surface of the frame 300 .

The first and second diode lasers VLS1 and VLS2 may be spaced apart from each other at a predetermined distance on the lower surface of the central part of one side of the frame 300 . The video alert beam VB emitted from each of the first and second diode lasers VLS1 and VLS2 is planar in the form of a surface light source on the non-contact touch screen UCS through the beam conversion lens CL shown in FIG. 5 . can be evenly investigated. The video alert beam VB emitted from the two light emitting elements VLS1 and VLS2 through the lens CL can reduce blind spots and be more densely irradiated on the non-contact touch screen USC.

7A and 7B are diagrams illustrating a video alerting apparatus according to a third embodiment of the present invention. 7A is a top plan view of the frame 300 as viewed from above. 7B is a bottom plan view of the frame 300 as viewed from below.

7A and 7B , one or more diode lasers VLS1 and VLS2 are disposed on one long side of the frame 300 . The video alarm beam VB emitted from the diode lasers VLS1 and VLS2 is converted into a beam in the form of a surface light source through the beam conversion lens CL shown in FIG. can be investigated evenly.

8A and 8B are diagrams illustrating a video alerting apparatus according to a fourth embodiment of the present invention. 8A is a top plan view of the frame 300 as viewed from above. 8B is a perspective view illustrating a plurality of diode lasers VLS disposed on a lower surface of the frame 300 . As shown in FIGS. 8A and 8B , the plurality of diode lasers VLS may irradiate a video alert beam VB on the non-contact touch screen UCS without the beam conversion lens CL. The diode lasers VLS may be spaced apart from each other at equal intervals.

9A and 9B are diagrams illustrating a video alerting apparatus according to a fifth embodiment of the present invention. 9A is a top plan view of the frame 300 as viewed from above. 9B is a perspective view illustrating the light emitting elements LE and VLS and the light receiving elements RE disposed on the upper surface of the frame 300 . 9A and 9B , the plurality of diode lasers VLS may be disposed on the same plane on the frame 300 together with the infrared light emitting elements LE and the infrared light receiving elements RE.

10 is a diagram illustrating an example of an audio alert device.

Referring to FIG. 10 , the second alarm unit 160 may output an audio alarm signal through the speaker SP when a non-contact object is detected on the non-contact touch screen UCS in response to the output signal of the sensor 161 . have.

Similarly, the first alarm unit 150 outputs a video alarm signal as a beam of a predetermined wavelength through a diode laser (VLS) when a non-contact object is detected on the non-contact touch screen UCS in response to the output signal of the sensor 161 . can do.

The sensor 161 may be a motion sensor or a distance measuring sensor. The sensor 161 may be disposed on the frame 300 , but is not limited thereto. For example, one or more of the inner wall of the housing 400 shown in FIG. 11 or one or more disposed under the rear surface of the display panel 100 detects a movement on the non-contact touch screen (UCS) or a change in the distance of a non-contact object. It can be transmitted to the first and second alarm units 150 and 160 .

11A and 11B are perspective views illustrating a housing having a foreign material discharging structure.

11A and 11B , the display device of the present invention may further include a housing 400 . The display panel 100 and the frame 300 spaced apart by a predetermined distance D are installed inside the housing 400 . The upper surface of the housing 400 is open to expose the non-contact touch screen (UCS) and the screen of the display panel 100 .

At least one of the sidewalls of the housing 400 may be provided with a foreign material outlet 401 penetrating the sidewall. The outlet 401 may be disposed at the same height as the display panel 100 on the sidewall of the housing 400 .

The display panel 100 may be disposed deeply inside the housing 400 . In this case, foreign substances such as dust or beverages may contaminate the display panel 100 . If there is no outlet 401 in the housing 400, it is difficult to remove the foreign material. As shown in FIG. 12 , the outlet 401 may be used for discharging foreign substances on the surface of the display panel 100 deeply disposed in the housing 400 to the outside.

13A and 13B are views illustrating a lifting device of the display panel 100 .

13A and 13B , the display device of the present invention may further include a lifting device.

The lifting device includes a sensor 171 , a lifting driving unit 170 , a motor 430 , and a shaft 432 . and an X link 450 connected between the display panel 100 and the frame 300 . The sensor 171 detects a distance d between the non-contact object 500 and the display panel 100 . In response to the output signal of the sensor 171 , the lift driving unit 170 drives the motor 430 when the distance d between the non-contact object 500 and the display panel 100 is less than a preset threshold value to drive the housing. The display panel 100 is retracted below the 400 . The elevation driving unit 170 restores the position of the display panel 100 when the distance d between the non-contact object 500 and the display panel is equal to or greater than a threshold value. Accordingly, when the non-contact object 500 approaches the display panel 100 through the non-contact touch screen UCS defined by the frame 300 , the display panel 100 moves further away to maintain the non-contact state.

The motor 430 rotates when driven by the lift driving unit 170 to rotate the shaft 432 . The X link 451 is linked to the shaft 432 to elevate the display panel 100 . The X-link 451 is rotatably fastened to a cross structure about the rotation shaft 451 . The upper ends of the X-link 451 are fastened to a guide hole 452 of the frame 300 to be linearly movable. The upper ends of the X link 451 are fastened to the guide hole 453 formed in the side frame of the display panel 100 to be movable in a straight line.

The shaft 432 may convert the rotational motion of the motor 430 into a ball screw that converts the linear motion into a linear motion. The motor 430 may be replaced with an air cylinder.

The sensor 171 may be a motion sensor or a distance measuring sensor as described above. One or more sensors 171 are disposed on the inner wall of the housing 400 or under the rear surface of the display panel 100 to sense a change in the distance between the non-contact object 500 and the display panel 100 in real time.

14 is a diagram illustrating an example of a beam conversion lens CL.

Referring to FIG. 14 , the light generated from the diode laser VLS is converted into a linear light source by a cylindrical beam conversion CL, and is diffused from the lens curved surface of the emitting surface of the beam conversion lens CL to the non-contact touch screen UCS. ) can be irradiated with a surface light source on the xy plane.

Since the contents of the specification described in the problems to be solved above, the means for solving the problems, and the effects do not specify the essential characteristics of the claims, the scope of the claims is not limited by the matters described in the contents of the specification.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be made within the scope without departing from the technical spirit of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The protection scope of the present invention should be construed by the claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: display panel 110: data driver
120: gate driver 130: timing controller
140: non-contact touch screen driving unit 150: first alarm unit
160: second alarm unit 161, 171: sensor
170: lift drive unit 200: host system
300: frame UCS: non-contact touch screen
LE: infrared light emitting element RE: infrared light receiving element
VLS: Diode Laser SP: Speaker

Claims (10)

a display panel on which an input image is displayed;
a frame defining a non-contact touch screen on the screen of the display panel; and
and a housing in which the display panel and the frame are disposed and having an open surface through which the non-contact touch screen and the display panel are exposed;
The frame is
a plurality of infrared light emitting elements, a plurality of infrared light receiving elements, and one or more diode lasers;
A beam conversion lens is disposed in front of the light emitting surface of the diode laser,
The non-contact touch screen is defined by the inner space of the frame,
The frame is disposed inside the housing to be spaced apart from the screen of the display panel,
A display device in which light generated from the diode laser is converted into a planar light source including straight light and diffused light passing through a curved surface of the beam conversion lens and irradiated to the non-contact touch screen. delete The method of claim 1,
The infrared light emitting elements and the infrared light receiving elements are disposed on the upper surface of the frame,
The display device in which the at least one diode laser is disposed on a rear surface of the frame. The method of claim 1,
and the infrared light emitting elements, the infrared light receiving elements, and the at least one diode laser are disposed on an upper surface or a rear surface of the frame. The method of claim 1,
When an object is detected on the non-contact touch screen, the diode laser is turned on,
A display device in which the diode laser is turned on after an object is detected on the non-contact touch screen. The method of claim 1,
a display panel driver configured to write pixel data to pixels of the display panel;
a timing controller controlling the display panel;
a non-contact touch screen driving unit for driving the infrared light emitting elements and outputting location information in which infrared rays are blocked on the non-contact touch screen based on output signals of the infrared light receiving elements;
a host system that processes a user input indicated by location information of an object recognized on the non-contact touch screen in response to location information received from the non-contact touch screen driver;
a sensor for detecting an object on the non-contact touch screen; and
Further comprising a first alarm unit for outputting a video alarm signal by driving a diode laser in response to the output signal of the sensor,
the sensor is
At least one display device disposed on the frame or disposed under an inner wall of the housing or a rear surface of the display panel. 7. The method of claim 6,
and a second alarm unit configured to output an acoustic alarm signal through a speaker in response to an output signal of the sensor. 8. The method of claim 7,
The host system enables at least one of the first and second alarm units in response to the location information. The method of claim 1,
At least one side wall of the enclosure,
and a foreign material outlet formed at the same height as the display panel. The method of claim 1,
a display panel driver configured to write pixel data to pixels of the display panel;
a timing controller controlling the display panel;
a non-contact touch screen driving unit for driving the infrared light emitting elements and outputting location information in which infrared rays are blocked on the non-contact touch screen based on output signals of the infrared light receiving elements;
a host system that processes a user input indicated by location information of an object recognized on the non-contact touch screen in response to location information received from the non-contact touch screen driver;
a sensor sensing a distance between an object passing through the non-contact touch screen and the display panel; and
When the distance between the object and the display panel becomes smaller than a preset threshold in response to the output signal of the sensor, the display panel is moved downward of the housing to determine the distance between the display panel and the object and the display panel Further comprising an elevating driving unit to maintain more than a threshold value,
the sensor is
At least one display device disposed under an inner wall of the housing or a rear surface of the display panel.

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