KR20060116581A - Portable LCD touch screen with data entry and storage - Google Patents

Abstract

Portable LCD touch screen with data input and storage function that can output sensitive touch data through correction of touch data and noise reduction, and input, output and save data without computer or dedicated terminal.

The touch panel of the portable LCD touch screen according to the present invention receives touch data by a user's touch from a user, and the image input terminal receives image data including still image or video data from an external device. The memory receives and stores the touch data and the image data from the touch panel and the image input terminal. The data processor may store the touch data and the image data in the memory or directly provide the touch data and the still image data to the liquid crystal panel. The liquid crystal panel displays touch data or image data stored in the memory or displays data directly provided from the data processor.

Description

Portable LCD Touch Screen with Data Input and Storage {LCD Touch Screen with Function of Data Input and Storage}

1 is a block diagram showing the configuration of a portable LCD touch screen with an input and a storage function according to an embodiment of the present invention.

2 is a block diagram illustrating a process of processing touch data according to an embodiment of the present invention.

3 is a view illustrating an input / output method and an interface method for each panel size according to an exemplary embodiment of the present invention.

4 is a block diagram illustrating a process of processing image data according to an embodiment of the present invention.

5 is a block diagram showing a process of processing voice data input from a user according to an embodiment of the present invention.

6 is a block diagram showing in detail the processing of the voice data according to an embodiment of the present invention.

7 is a detailed block diagram illustrating a configuration of a data processing unit according to an embodiment of the present invention.

8 illustrates noise generated in a touch panel.

9 illustrates a graphical interface in accordance with an embodiment of the present invention.

10 is a view showing various applications of the portable LCD touch screen according to the present invention.

<Description of the symbols for the main parts of the drawings>

2: portable LCD touch screen 4: touch panel

6: LCD panel 8: Video input terminal

12: video data converter 14: video output terminal

16: voice input terminal 18: voice compression unit

20: audio output terminal 22: memory

24: USB port 26: data processing unit

32: external terminal

The present invention relates to a touch screen, and more particularly, to an independent LCD touch screen capable of inputting, outputting, and storing audio data and various kinds of image data.

In general, a touch screen refers to a device that receives data generated when a user touches the surface of a liquid crystal display with a pen or a finger. Recently, a touch screen is used in place of a keypad in an ATM, such as a bank, and a PDA. The device is also widely used in navigation and the like. However, when writing letters on the touch screen instead of simply touching them using the conventional touch screen, the touch speed and sensitivity are inconvenient when writing, and the written words were not easy to read. .

In addition, the existing touch screen is a device that displays contents stored in a computer or a dedicated terminal connected to a computer or a dedicated terminal equipped with an operating system (OS), so that predetermined information can be played without using the computer or the dedicated terminal. Of course I could not enter information. In addition, the existing touch screen only had a function of displaying information, and thus could not store data input from the outside. In other words, the existing touch screen was a device that can not perform any function without the help of a computer or a dedicated terminal. Therefore, users who only require the reproduction of simple information such as presentations using the touch screen should always purchase expensive equipment such as a computer or a dedicated terminal, and furthermore, without purchasing a computer or a dedicated terminal, any information can be used using the touch screen. Could not be entered or stored on the touch screen.

On the other hand, as described above, the use of the touch screen requires a computer or a dedicated terminal, so its use is extremely limited in the outdoors, and in the case of the existing touch screen, since compatibility with various external devices has not been secured, Had to have equipment.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and provides a touch screen having a data input and storage function capable of outputting touch data having high sensitivity by correcting data by touch and removing noise. Shall be.

Another object of the present invention is to provide a touch screen having a data input and storage function capable of inputting and storing data without a computer or a dedicated terminal.

In addition, another object of the present invention is to provide a touch screen having a data input and storage function compatible with various external devices.

Portable LCD touch screen having a data input and storage function according to an embodiment of the present invention for achieving the technical problem is a touch panel for receiving touch data by the user's touch; An image input terminal for receiving image data including still image and video data from an external device; A memory for storing touch data and image data input from the touch panel and the image input terminal; A data processor which stores the touch data and the image data in the memory or directly provides the touch data and the still image data to a liquid crystal panel; And a liquid crystal panel which displays touch data or image data stored in the memory or displays data directly provided from the data processor.

A data processing unit configured to correct touch data input through the touch panel, store the data in the memory, and provide the corrected touch data to the liquid crystal panel; Converts the still image data input from the image input terminal into a predetermined picture file format and stores the image into the memory, and mixes the still image data input from the image input terminal with the touch data input by the touch panel. A video / audio data control module generating data and storing the data in the memory; And an image output control module for selecting one of the still image and moving image data input from the image input terminal and a mixed image generated by the image / audio data control module and providing the same to the liquid crystal panel. It includes more.

The touch panel control module may correct a distortion of the touch data input by a user's touch using a moving average filter.

The touch panel control module may set a predetermined time period to remove noise from the touch data input by the user's touch, and process and remove data generated at a time less than or equal to the time period as noise. do.

The touch panel control module may display the average value by calculating an average value of adjacent pixel values to remove noise from the touch data input by a user's touch.

In a modified embodiment of the present embodiment, the portable LCD touch screen further includes a universal serial bus capable of downloading predetermined data from an external terminal or uploading data stored in the memory to the external terminal. And a universal serial bus control module for controlling the universal serial port, wherein the video / audio data controller of the data processor converts the data input from the external terminal into a predetermined picture file format and stores the data in the memory. It is done.

In one embodiment, the video / audio data control unit of the data processing unit captures the image displayed on the monitor of the external terminal, downloads the image to the universal serial bus (USB), converts it into a predetermined picture file format, and stores it in the memory. It may be.

In addition, when the portable LCD touch screen is connected to an external terminal through the universal serial bus (USB), the touch panel may also perform a mouse function.

In another embodiment of the present disclosure, the data processor may further include a graphic user interface control module to provide a user with a unique graphic interface on the monitor itself.

The graphic interface provided by the graphic user interface control module is characterized in that the paint function of the computer is implemented in hardware.

The graphical interface provided by the graphical user interface control module may further include: a menu button for displaying submenus when selected by a user; A drawing button for drawing as the user touches; A clear button for allowing the user to erase the drawn content as touched; Reset button to delete the entire screen; Line thickness button that allows you to choose the thickness of the line to be drawn or the line to be erased; A line color button that allows you to change the color of the line being drawn; A file upload button for uploading predetermined data to an external terminal; And a file download button for transmitting predetermined data from the external terminal.

In another embodiment, the portable LCD touch screen may include a voice input terminal configured to receive voice data from a user or the external device; A voice data compressor for compressing voice data input by the voice input terminal with a predetermined compression algorithm and storing the voice data in the memory; And an audio output unit configured to output audio data included in the compressed audio data or video data input from the video input terminal. More,

The data processor further includes a voice compressor control module for controlling the voice data compressor, wherein the image / audio data controller of the data processor stores voice data provided from the voice data compressor in the memory and outputs the voice. It is characterized by output through the negative.

 The portable LCD touch screen may further include an image data converter configured to convert image data input through the image input terminal into a data format that can be displayed by the liquid crystal panel.

The portable LCD touch screen further includes an image output terminal for displaying the still image or moving image data input from the image input terminal through an external monitor or a beam project.

In a preferred embodiment, the data processor may be implemented as a field programmable gate array (FPGA).

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a block diagram showing a configuration of a portable LCD touch screen with an input and a storage function according to an embodiment of the present invention. The portable LCD touch screen 2 includes a touch panel 4, a liquid crystal panel 6, an image input terminal 8, an image data converter 12, an image output terminal 14, an audio input terminal 16, and an audio. A compression unit 18, a voice output terminal 20, a memory 22, a universal serial bus (USB, hereinafter referred to as "USB") 24 and a data processor 26.

In general, the touch panel 4 includes a resistive film, a capacitive electrode, an ultrasonic method, and the like. In one embodiment, the touch panel 2 is implemented using a resistive film. As shown in FIG. 2, the resistive touch panel is manufactured such that a resistance change occurs when a touch is applied to the metal film 28 having the resistive component. The ADC 30 converts the resistance value generated from the metal film 28 into a digital value and then provides it to the data processing unit 26. The data processing unit 26 corrects the resistance value to remove distortion and then stores the memory ( 22) to be transmitted to the liquid crystal panel 6 to display. In addition, the resistance value may be transmitted to the external terminal 32 and output through the external terminal 32. As described above, in the present embodiment, the touch panel 4 allows the user to write by using the touch panel 4. In the modified embodiment, the user may use the touch panel 4 as a mouse function. Can be used.

Referring back to FIG. 1, the liquid crystal panel 6 of the portable LCD touch screen 2 according to the present invention may be implemented in a size of 15 inches, 17 inches, or 19 inches. As the size of the panel increases, the amount of data to be processed increases, so the voltage level of the signal decreases and the processing method changes. Panel input and output method and interface method according to an embodiment of the present invention is shown in FIG.

 The image input terminal 8 receives image data including still image data and moving image data from various external devices such as a computer, a digital TV, an electron microscope, and an airwave TV. The input image data is stored in the memory 22 through the data processor 26 or output through the liquid crystal panel 6. In one embodiment, it is preferable to include a tuner (not shown) for channel setting in order to receive over-the-air TV with the portable LCD touch screen of the present invention.

The ADC 10 converts an analog RGB signal input from an external device and a video signal input from a DTV into a digital signal.

The image data converter 12 displays digital signals suitable for the liquid crystal panel 6 to display composite signals, S-video, TV signals, etc., input from various external devices, through the liquid crystal panel 6. A digital signal output from the ADC 10 or converted into a digital data signal suitable for the liquid crystal panel 6 is converted. In one embodiment, the image data converter 12 may be implemented using a commercial chip, and the commercial chip used may select a chip compatible with various video signals.

Referring to FIG. 4, the image data input from the image input terminal 8 is stored and displayed in the memory 22 after passing through the image data converter 12. Various image data input from an external device The ADC 10 converts the digital data. The image data converted into digital data is converted into RGB digital data through the image data converter 12 and input to the data processor 26. The input image data and the image data pre-stored in the memory 22 and the touch data input from the touch panel 4 are mixed by the data processing unit 26, stored in the memory 22, and the liquid crystal panel 6 is opened. It is displayed through or external terminal 32.

The image output terminal 14 is input from the image input terminal 8 and processed by the data processing unit 26 through a predetermined procedure, and then converted to analog data through the DAC 15 to an external monitor or Display through the beam project.

Referring back to FIG. 1, the voice input terminal 16 receives voice data from a user, and the voice compressor 18 compresses the voice data transmitted from the voice input terminal 16 by a predetermined compression algorithm. In this case, since the voice signal does not require as high sound quality as music, it is preferable to use a compression method that can store a relatively large amount of data by storing only low sampling and small data. The compressed voice data is stored in the memory 22 through the data processor 26 and then output through the voice output terminal 20 or transmitted to the external terminal 32 and output through the external terminal 32. As such, a process of compressing the voice data input through the voice input terminal 16, for example, the voice input terminal 16 such as a microphone, and outputting the voice data through the voice output terminal 20 is illustrated in FIG.

The audio output terminal 20 receives the audio data included in the image data provided from the image data converter 12 or the compressed audio data provided to the voice compressor 18 from the data processor 26 and selectively. Play it. Specifically, referring to FIG. 6, the voice output terminal 20 implemented as a speaker includes a selection switch 21 that is operated by a user's selection input through the touch panel 4. The user can play the desired audio data among the audio data generated in the image data converter 12 or the audio compressor 28 provided to the reference numeral 26. For example, when the user wants to output the audio data output from the TV, when the TV audio output is selected through the touch panel 4, the selector switch 21 is set to the TV audio output so that the audio data of the TV is output. If the user wants to output the recorded voice data, the user's voice is selected when the user's voice is selected and the user's voice is output.

Referring back to FIG. 1, the memory 22 of the portable LCD touch screen 2 includes touch data input from the touch panel 4, image data converted through the image data converter 12, and audio compression unit 18. The compressed audio data, the mixed image data in which the touch data and the image data are mixed, and a program for driving the data processor 26 are stored. In one embodiment, the memory may include an SDRAM 34, a FLASH 36, a ROM 38, and the SDRAM 34 stores temporary image data, touch data, and mixed image data. In 36, permanent voice data is stored, and in the ROM 38, a program for driving the data processing unit is stored.

The USB port 24 connects the portable LCD touch screen 2 and the external terminal 32 according to the present invention to download data from the external terminal 32 or stored in the memory 22 of the portable LCD touch screen 2. Allows data to be uploaded to the external terminal 32.

The data processor 26 processes image data input from the image data converter 12, voice data input from the voice input terminal 16, and touch data input from the touch panel 4. The data processor 26 will be described in detail with reference to FIG. 7 where the configuration of the data processor 26 is illustrated. The data processor 26 includes a touch panel control module 40, a voice compressor control module 42, and a graphic. And a user interface control module 44, a USB port control module 46, a video / audio data control module 48, and a video output control module 50.

The touch panel control module 40 obtains touch coordinates from data input from the touch panel 4, corrects the obtained coordinates, and stores coordinate data according to the resolution in the memory 22. When the touch panel 4 is implemented in a resistive film type, due to the characteristics of the material, the touch surface is affected by the change in the peripheral resistance, and thus it is recognized that the touch is generated in the part which is not touched by the user. Phenomenon which occurs occurs. The point 52 generated by this kink phenomenon is shown in FIG. The touch panel control module 40 removes the point 52 generated by the shock phenomenon shown in FIG. 8 through a calibration operation.

In one embodiment, a time difference is used as a correction method for removing a point 52 (hereinafter referred to as "noise") generated by the phenomenon. In detail, the point generated by the user and the noise are different from the time the point is generated, so set a predetermined time period and treat the point occurring at a time below the time interval as noise so that the point is not displayed. . For example, if it takes 1 second to draw 1024 pixel lines, it takes 1 ms or more to draw 1 pixel line. Therefore, in this case, the predetermined time period is set to 1 ms, and the point occurring at a time of 1 ms or less is recognized as noise so that it is not displayed.

In another embodiment, a filter is used to remove noise, and a filter capable of displaying an average value by calculating an average value of pixel values of a pixel having a point generated by a user and a pixel value of a pixel adjacent to the pixel. Is to use The correction method using such a filter does not substantially remove the noise, but prevents the user from recognizing the noise as the noise when the noise occurs.

The touch panel control module 40 corrects the lines obtained from the touch data by using the moving average filter when the lines are distorted due to shaking while the user draws the lines. Also perform. At this time, the correction of the coordinate is performed by the following equation.

Where Y _k means the target coordinate, a _k means the surrounding coordinate, and b _k means the weighting coefficient.

Next, the voice compressor control module 42 controls the voice compressor 18 to transmit the compressed voice data to the computer through the USB port 24. In order to transmit predetermined data to the external terminal 32 through the USB port 24, the size of the data must be known first, so the voice compression unit control module 42 counts the compressed voice data to know the size of the compressed voice data. Done.

The graphic user interface control module 44 provides a user with a unique graphic interface, and provides a guide line of the output image according to the coordinates acquired by the touch data. In addition, as shown in FIG. 9, by providing a unique menu bar 54 through the liquid crystal panel 6, a user may perform a desired operation.

Referring to FIG. 9, the graphic user interface according to an embodiment is a hardware implementation of a basic function of a paint used in a computer, and the menu bar 54 and the menu button 56 which are always displayed on the screen are displayed on the menu bar 54. Draw button 58, erase button 60, reset button 62, line thickness button 64, line color button 66, file upload button 68 and file download button 70 generated when the button is touched There is).

In the present embodiment, if the menu button 56 is always displayed on the upper right side, when the user selects the menu button 56, the submenus are expanded. The draw button 58 draws as the user touches, the erase button 60 allows the user to touch, and the reset button 62 allows the entire screen to be deleted. The line thickness button 64 allows the user to select the thickness of the line to be drawn when the line is drawn after selecting the drawing. The same applies to deleting the line after selecting the erase button 60. The line color button 66 allows the user to change the color of the drawn line to a desired color. The file upload / download button 68/70 makes it possible to upload or download the data of the touch screen 2 to the external terminal 32.

Referring back to FIG. 7, the USB port control module 46 of the data processor 26 controls the USB port 24 so that the portable LCD touch screen 2 downloads data from the external terminal 32 or the external terminal. (32) allows the transmission of video, audio and touch data.

The video / audio data control module 48 converts the still image data input from the image input terminal 8 into a predetermined picture file format and stores the image data in the memory 22 or in the image data. The audio data compressed by 18 is stored in the memory 22. In one embodiment, the still image data input from the image input terminal 8 is converted into a BMP format file or a JPG format file, which is a picture file, or predetermined data downloaded from an external terminal 32 such as a PC is BMP. Convert the file into the file format or JPG format. For example, PPT file format data used for presentations can be downloaded from a PC, and the PPT file format data can be converted into a picture file BMP for display.

Also, the video / audio data control module 48 generates mixed image data by mixing still image data input from the image input terminal 8 and touch data input by the touch panel 4, and stores the mixed image data in the memory 22. And it can be displayed through the liquid crystal panel (6). For example, when the portable LCD touch screen 2 is used for scientific practice, the image data is received from an electron microscope connected through the image input terminal 8 and displayed on the liquid crystal panel 6, wherein the lecturer displays the image. In the case of writing on the image, the touch data of the lecturer's touch is displayed together with the image data.

In the modified embodiment, the video / audio data control module 48 captures the image displayed on the monitor of the external terminal 32, downloads it through the USB port 24, converts it into a picture file, and converts the image into a memory ( 22).

The image output control module 50 may include still images and video data input from the image input terminal 8, mixed image data generated by the video / audio data control module 48, and various kinds of data stored in the memory 22. Image data is displayed via the liquid crystal panel (6).

In a preferred embodiment, the six modules included in the data processor 26 may be implemented as one chip called a field programmable gate array (FPGA). FPGAs are a new type of on-demand semiconductor that can be operated at low cost as a means of verifying the operation by actually hardwareing the designed logic. Therefore, it is desirable to check whether the designed logic works by implementing hardware in FPGA at the design stage of the product and then implement the logic as an ASIC (Application Specific Integrated Circuit) in the mass production stage.

FIG. 10 illustrates various application examples of the portable LCD touch screen 2 according to the present invention. The left side of the portable LCD touch screen shows various external devices for inputting image data to the image input terminal 8. A camcorder, a digital camera, an electron microscope, and a computer are shown. The right side shows a beam projector or a CRT monitor connected to the image output terminal 20. As shown, the portable LCD touch screen 2 according to the present invention can support the input of various image data such as RGB, S-VIDEO, DTV, TV, etc. and is compatible with most external devices that output such data in addition to the illustrated device. It is possible to output data through various equipment such as CRT and beam project, so there is no need for additional system.

Those skilled in the art should understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

As described above, according to the present invention, the touch data input through the touch panel can be output more sensitive touch data to the existing touch screen through the correction technique and the noise removal, so that the touch speed is higher than that of the computer-based touch monitor. And the sensitivity is superior and the lecturer does not need to save the teaching material by typing the keyboard.

 In addition, there is an image input terminal capable of receiving image data from various systems such as a TV, a digital TV, a camcorder, a digital camera, and an electron microscope, so that it is compatible with various systems.

In addition, the present invention can download and store a background image, etc. from an external terminal in the portable LCD touch screen itself, and can store the voice of the lecturer, as well as a function for outputting information to the monitor as well as input and storage device in education or presentation It can be used as a tool, and furthermore, it supports two methods of capturing the screen of an external terminal and storing a picture file at the same time.

In addition, in the outdoor activities, such as military or sports events, if only portable LCD touch screen according to the present invention can carry out the operation meeting and the like without a computer or a dedicated terminal has the effect that the portability is maximized.

In particular, in the field of education, which is the most efficient application field, the lecturer's voice and the handwritten image can be stored together in the portable LCD touch screen according to the present invention, and can be played at any time.

Claims (15)

Portable LCD touch screen with data entry and storage, A touch panel configured to receive touch data by a user's touch; An image input terminal for receiving image data including still image and video data from an external device; A memory for storing touch data and image data input from the touch panel and the image input terminal; A data processor which stores the touch data and the image data in the memory or directly provides the touch data and the still image data to a liquid crystal panel; A liquid crystal panel which displays touch data or image data stored in the memory or displays data directly provided from the data processor; Portable LCD touch screen with a data input and storage function comprising a. The method of claim 1, wherein the data processing unit A touch panel control module configured to correct touch data input through the touch panel, store the touch data in the memory, and provide the corrected touch data to the liquid crystal panel; Converts the still image data input from the image input terminal into a predetermined picture file format and stores the image into the memory, and mixes the still image data input from the image input terminal with the touch data input by the touch panel. A video / audio data control module for generating data and storing the data in the memory; And An image output control module for selecting one of the still image and moving image data input from the image input terminal and a mixed image generated by the image / audio data control module and providing the same to the liquid crystal panel; Portable LCD touch screen with a data input and storage function characterized in that it further comprises. The portable LCD touch screen of claim 2, wherein the touch panel control module corrects distortion of the touch data input by a user's touch using a moving average filter. The touch panel control module of claim 2, wherein the touch panel control module sets a predetermined time interval to remove noise from the touch data input by a user's touch, and processes and removes data generated at a time longer than the time interval as noise. Portable LCD touch screen with data input and storage function, characterized in that. The data input and storage function of claim 2, wherein the touch panel control module calculates an average value of adjacent pixel values and displays the average value to remove noise from the touch data input by a user's touch. Portable LCD touch screen. The portable LCD touch screen of claim 2, wherein It further comprises a universal serial bus (USB) for downloading predetermined data from an external terminal or upload the data stored in the memory to the external terminal, The data processor further includes a universal serial bus control module for controlling the universal serial port, The image / audio data controller of the data processor converts data input from the external terminal into a predetermined picture file format and stores the data in the memory. The apparatus of claim 6, wherein the image / audio data controller of the data processor captures an image displayed on a monitor of the external terminal, downloads the image to the universal serial bus, and converts the image into a predetermined picture file format and stores the image in a memory. Portable LCD touch screen with data entry and storage. The portable LCD touch screen of claim 6, wherein the touch panel may perform a mouse function when the portable LCD touch screen is connected to an external terminal through the universal serial bus. The portable LCD touch screen of claim 1, wherein the data processor further comprises a graphic user interface control module to provide a user with a unique graphic interface. 10. The portable LCD touch screen of claim 9, wherein the graphic interface provided by the graphic user interface control module implements a paint function of a computer in hardware. 11. The graphical interface of claim 10, wherein the graphical interface provided by the graphical user interface control module is A menu button for displaying submenus when selected by the user; A drawing button for drawing as the user touches; A clear button for allowing the user to erase the drawn content as touched; Reset button to delete the entire screen; A line thickness button that allows you to select the thickness of the line to be drawn or the thickness of the line to be erased; A line color button that allows you to change the color of the line being drawn; A file upload button for uploading predetermined data to an external terminal; And And a file download button to allow predetermined data from the external terminal. The method of claim 1, wherein the portable LCD touch screen A voice input terminal for receiving voice data from a user or the external device; A voice data compressor for compressing voice data input by the voice input terminal with a predetermined compression algorithm and storing the voice data in the memory; And An audio output unit configured to output audio data included in the compressed audio data or video data input from the video input terminal; Further comprising, the data processing unit Further comprising a voice compression unit control module for controlling the voice data compression unit, And a video / audio data control unit of the data processor stores the audio data provided from the audio data compression unit in the memory and outputs the audio data through the audio output unit. The method of claim 1, wherein the portable LCD touch screen And a video data converting unit for converting the image data input through the image input terminal into a data format that can be displayed by the liquid crystal panel. The method of claim 1, wherein the portable LCD touch screen And a video output terminal for displaying the still image or video data input from the video input terminal through an external monitor or a beam project. . The portable LCD touch screen of claim 1, wherein the data processor is implemented as a field programmable gate array (FPGA).

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