KR100942293B1 - A source of light type touch sensing method, touch panel and the system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch sensing system in a display device. In particular, a display area is provided by providing a light detection sensor distributed in a matrix type in a display area and then detecting that light emitted from the display element is reflected at an arbitrary distance. The present invention relates to a touch sensing method using light for recognizing coordinates within the apparatus and to loading a program of a corresponding position, and a touch panel device and a system according thereto.

Touch sensing method, touch sensing device, TFT-LCD, TFT substrate, PDP, LED, OLED, VFD, E-Paper, PDLC, multi sensing, area sensing, fingerprint sensing, light source, light sensor, backlight unit

Description

Touch sensing method using light, and touch panel device and system according thereto {A SOURCE OF LIGHT TYPE TOUCH SENSING METHOD, TOUCH PANEL AND THE SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch sensing system in a display device. In particular, a display area is provided by providing a light detection sensor distributed in a matrix type in a display area and then detecting that light emitted from the display element is reflected at an arbitrary distance. The present invention relates to a touch sensing method using light for recognizing coordinates within the apparatus and to loading a program of a corresponding position, and a touch panel device and a system according thereto.

In general, various electronic devices are being made through the development of electronic communication technology, and these devices are increasingly emphasizing user's convenience and design's beautifulness. It is the diversification of input devices.

That is, such an input device has been developed from a data processing process through an input device such as a keyboard or a keypad, and has also been developed in the form of a touch panel in which an input device and an output device can be bundled and used. As shown in FIG. 1, a touch panel is a generic term for an input device that directly touches the display panel and has a simple, low malfunction, input and character input without other input devices.

In FIG. 1, reference numeral FC denotes a front glass, and reference numeral H denotes a housing of a touch panel.

The detection method, structure, and performance of the touch panel are known in detail. For example, a resistive film method including two resistive component sheets, which are separated by a spacer and arranged to be in contact with each other by pressing, is formed. ), Capacitive, ultrasonic input, infrared input, and electromagnetic induction.

Among them, the resistive film method, which is widely used as an input device such as an electronic notebook, PDA, portable PC, etc. in combination with a liquid crystal display (LCD), is known as an advantageous design method compared to other methods in thin, small, light weight, or low power consumption. The two substrates coated with the electrode (ITO) layer are bonded to each other with the Dot Spacer interposed therebetween, so that a signal for position detection is applied when the upper substrate is contacted with a finger or a pen. And, it has an operating principle that determines the position by detecting the electrical signal when it is in contact with the transparent electrode layer of the lower substrate, while having a response speed and economical efficiency, the durability is degraded and the risk of breakage is great.

Meanwhile, in the case of the capacitive type, a special conductive metal (TAO; Tin Antimony Oxide) material is coated on both sides of the SUBSTRATE constituting the touch screen sensor to form a transparent electrode, and a certain amount of current flows on the glass surface. Capacitance has the principle of detecting the position by detecting the amount of current changed by the user's touch by using the capacitance in the human body and calculating the size, or wearing a pen or glove because it uses the human body's capacitance It is difficult to operate by hand and is easily influenced by external environment, so it is difficult to design the structure and circuit.Therefore, there is a limitation in using it.There are considerable difficulties in the production of large size display panel products. It implies

In addition, in the case of the ultrasonic method, a piezoelectric element using the piezoelectric effect is used. The surface wave generated when the touch panel is touched is alternately generated in the X and Y directions to determine the position by grasping the distance to each input point. Although high resolution and light transmittance are disadvantageous, they are vulnerable to sensor contamination and liquids.

In addition, in the infrared system, a plurality of light emitting devices and light receiving devices are arranged around a panel to create a matrix. When the light is blocked by a user, the X and Y coordinates of the output point of the blocked portion are obtained. As a principle of judging input coordinates, it has high light transmittance without using overlay and has strong durability against external impact and scratches.However, in the case of bulky and infrared monitors, the identification of incorrect touch is reduced and response speed There is also a slow downside.

Therefore, each touch method is limited to the implementation by each touch method selected according to the size of the touch area due to its characteristics and disadvantages, and thus it is difficult to compose the same system due to the limitation on the production and applicable technology for each use. There is a problem.

Meanwhile, in addition to the above, a thin film transistor type photo-sensor is disclosed.

The thin film transistor type optical sensor includes a sensor part, a charging part, a switch part, and a window, and the sensor part and the switch part are configured of a thin film transistor.

Here, the sensor unit is a means for generating a photo current by sensing the light reflected from the light source through the window from the light source, the charging unit is a means for storing the current generated in the sensor unit in the form of charge The switch-thin film transistor forming the switch unit refers to a means for selectively discharging the charge stored in the charging unit to the outside according to a control signal in association with an external driving IC.

Therefore, an active layer (semiconductor layer) that is a direct means of generating photocurrent in the sensor-thin film transistor should use a material sensitive to light and active photoelectric conversion. The sensor-thin film transistor and the switch part Since the switch-thin film transistor has the same configuration and is patterned and formed at substantially the same time, photoelectric conversion occurs in the switch-active layer (semiconductor layer) by the light irradiated by the backlight.

The generated photocurrent is a liquid phase current that causes deterioration of the switch operating characteristics.

In order to prevent this, the switch-active layer (semiconductor layer) should be formed smaller than the area of the switch-gate electrode which is a metal electrode in order to shield the light of the backlight which can be irradiated to the switch-active layer (semiconductor layer). In designing this, considerable care is required, and work difficulties are pointed out.

In addition, in the case of the thin film transistor type photodetector having a structure that responds to the touch panel or the optical sensor described above, sensing is performed through contact with the panel. Of course, there may be a problem such as a scratching phenomenon occurs that the surface is scratched in the frequent contact process.

SUMMARY OF THE INVENTION An object of the present invention for solving the above-mentioned problems relates to a touch sensing system in a display device. In particular, a light sensing sensor distributed in a matrix type in a display area and then irradiated with light from a display element is an arbitrary proximity distance. The present invention provides a touch sensing method using light and a touch panel device and system according to the present invention for detecting coordinates in a display area and loading a program of a corresponding position based on the detected reflection.

The touch sensing method of the display device using the light source according to the present invention for achieving the above object is characterized in that the image unit for forming a display area by the pixel to express the brightness and color arranged in a matrix structure, and the image A touch sensing method applied to a display element located on a front surface of a part and having a front glass for protecting the image part, the touch sensing method comprising: an optical sensor corresponding to an arbitrary area in the display area on the front glass or the rear surface of the front glass or the image part; A first step of placing in a matrix arrangement; A second process of detecting light flowing into the front glass or the image unit by the optical sensor disposed through the first process; A third step of recognizing a position on a matrix array of the corresponding light sensor that has performed the sensing operation when the optical sensor generates the detection signal according to the sensing operation of the incoming light through the second process; A fourth step of determining the effectiveness of the sensing operation by comparing the intensity of the corresponding optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light through the second process; And comparing and analyzing signals determined to be valid through the fourth process to detect sensing ports that are uniformly distributed, and recognizing position coordinates on the final matrix array among the sensing coordinates recognized through the third process. And a fifth process of reading the coordinates.

In addition, the present invention is applied to a display element having a pixel portion representing luminance and color arranged in a matrix structure to form a display area, and a front glass positioned in front of the image portion to protect the image portion. In the touch panel:

An optical sensor disposed on a front surface or a rear surface of the front glass or the image part in a matrix arrangement corresponding to an arbitrary area in the display area and detecting light flowing into the front glass or the image part;

A sensing detection unit for recognizing a position on a matrix array of a corresponding optical sensor that has performed a sensing operation when a sensing signal is generated according to a sensing operation of incoming light in the optical sensor; And

When the detection signal is generated according to the sensing operation for the incoming light in the optical sensor includes a valid data processing unit for converting the intensity of the corresponding optical detection signal into an electrical signal and comparing it with the intensity of an arbitrary reference signal to determine the validity of the sensing operation A touch sensing device using a touch sensing method using light is provided.

In another aspect, the present invention, by forming a touch panel using any one of the techniques, by loading a program corresponding to the area that is determined to be touched through the touch panel of the image displayed on the image portion, the corresponding information through the image portion Provided is a touch sensing system using a touch sensing method using light, characterized in that to be displayed.

The present invention also provides a fingerprint sensing system of a touch sensing method, an object area recognition system and an iris recognition system.

According to the present invention, there is provided a touch sensing method using light and a touch panel device and system according to the present invention. When the user comes into close proximity with or without touching the TFT-LCD panel and other display panels, Using a light source selected from the side or directly under the unit, a light sensor and a light source attachable to each of the light sources, the light beam is irradiated so that the light beam of a predetermined frequency range is loaded by the TFT-LCD panel and other By detecting the effective light and the position reflected by the human body or object close to the front side of the display panel and the program loading by the correct position and sensing detection process, the image, audio, TFT-LC is used during the process because various information such as image is displayed. D panel and other display panel surface scratch or damage can be eliminated as much as possible, multi-touch and a specific shape, area, fingerprint, etc. can be detected, the effective ray detection, the corresponding position detection response process will be accelerated You can expect the effect.

The touch sensing method of the display device using the light source according to the present invention for achieving the above object is characterized in that the image unit for forming a display area by the pixel to express the brightness and color arranged in a matrix structure, and the image A touch sensing method applied to a display element located on a front surface of a part and having a front glass for protecting the image part, the touch sensing method comprising: an optical sensor corresponding to an arbitrary area in the display area on the front glass or the rear surface of the front glass or the image part; A first step of placing in a matrix arrangement; A second process of detecting light flowing into the front glass or the image unit by the optical sensor disposed through the first process; A third step of recognizing a position on a matrix array of the corresponding light sensor, which has performed the sensing operation, when the optical sensor generates the detection signal according to the sensing operation of the incoming light through the second process; A fourth step of determining the effectiveness of the sensing operation by comparing the intensity of the corresponding optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light through the second process; And comparing and analyzing signals determined to be valid through the fourth process to detect sensing ports that are uniformly distributed, and recognizing position coordinates on the final matrix array among the sensing coordinates recognized through the third process. And a fifth process of reading the coordinates.

Another aspect of the touch sensing method of the display device using the light source according to the present invention for achieving the above object is an image unit for forming a display area in which pixels representing the brightness and color are arranged in a matrix structure; A touch sensing method applied to a display element positioned on a front surface of an image unit and having a front glass for protecting the image unit, the touch sensing method comprising: light having a specific frequency preset by a user on the side of the image unit and the front glass; A first step of arranging a plurality of light sources to be irradiated, and arranging the light sensors in a matrix arrangement corresponding to an arbitrary area within the display area on the front or the back of the front glass or the image part; The light sensor irradiated by the light source disposed through the first process is reflected by an object approaching for the screen touch of the light irradiated in the omnidirectional direction of the front glass to detect the light flowing back to the front glass side by the optical sensor Two courses; A third step of recognizing a position on a matrix array of the corresponding light sensor, which has performed the sensing operation, when the optical sensor generates the detection signal according to the sensing operation of the incoming light through the second process; A fourth step of determining the effectiveness of the sensing operation by comparing the intensity of the corresponding optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light through the second process; And comparing and analyzing signals determined to be valid through the fourth process to detect sensing ports that are uniformly distributed, and recognizing position coordinates on the final matrix array among the sensing coordinates recognized through the third process. And a fifth process of reading the coordinates.

Another aspect of the touch sensing method of the display apparatus using the light source according to the present invention for achieving the above object is an image unit for forming a display area by the pixel to express the brightness and color arranged in a matrix structure; A touch sensing method applied to a display element positioned on a front surface of the image part and having a front glass for protecting the image part, the touch sensing method comprising: corresponding to an arbitrary area within the display area on the front glass or the rear surface of the front glass or the image part; A first step of disposing a light sensor and a light source for irradiating light having a specific frequency in a matrix arrangement; Light emitted from the light source disposed through the first process and reflected by an object approaching for the screen touch among the light irradiated in the omnidirectional direction of the front glass is reflected in the front glass or the image part side by the light sensor Sensing a second process; A third step of recognizing a position on a matrix array of the corresponding light sensor, which has performed the sensing operation, when the optical sensor generates the detection signal according to the sensing operation of the incoming light through the second process; A fourth step of determining the effectiveness of the sensing operation by comparing the intensity of the corresponding optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light through the second process; And comparing and analyzing signals determined to be valid through the fourth process to detect sensing ports that are uniformly distributed, and recognizing position coordinates on the final matrix array among the sensing coordinates recognized through the third process. And a fifth process of reading the coordinates.

An additional feature of the touch sensing method in the display device using the light source according to the present invention for achieving the above object is that the device (monitor) having a light source and a light sensor deposited on the front glass is a sensing area and linear The method further includes data processing for performing a calibration operation to obtain characteristic values such as a response.

Another feature of the touch sensing method in the display device using the light source according to the present invention for achieving the above object is, the backlight unit, and the front of the backlight unit and the amount of light transmitted from the backlight unit Touch sensing applied to a display element having a control unit that displays luminance and color by forming a display area by arranging a pixel in a matrix structure, and a front glass positioned in front of the image unit to protect the image unit. A method comprising: arranging a light source for irradiating light having a predetermined frequency preset by a user around the side and the back of the backlight unit, and corresponding to any area in the display area on the front or back of the front glass or image part The light sensors into a matrix array Key is the first step; Light emitted from the light source disposed through the first process and reflected by an object approaching for the screen touch among the light irradiated in the omnidirectional direction of the front glass is reflected in the front glass or the image part side by the light sensor Sensing a second process; A third step of recognizing a position on a matrix array of the corresponding light sensor, which has performed the sensing operation, when the optical sensor generates the detection signal according to the sensing operation of the incoming light through the second process; A fourth step of determining the effectiveness of the sensing operation by comparing the intensity of the corresponding optical sensing signal with the intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light through the second process; And comparing and analyzing signals determined to be valid through the fourth process to detect sensing ports that are uniformly distributed, and recognizing position coordinates on the final matrix array among the sensing coordinates recognized through the third process. And a fifth process of reading the coordinates.

Another feature of the touch sensing method in the display device using the light source according to the present invention for achieving the above object is, the backlight unit, and the front of the backlight unit and the amount of light transmitted from the backlight unit Touch sensing applied to a display element having a control unit that displays luminance and color by forming a display area by arranging a pixel in a matrix structure, and a front glass positioned in front of the image unit to protect the image unit. A method comprising: arranging, in one or a plurality of matrix arrays, a light source for irradiating light having a specific frequency preset by a light sensor and a user corresponding to an arbitrary area in the display area on the front or the back of the front glass or the image part Making a first process; Light emitted from the light source disposed through the first process and reflected by an object approaching for the screen touch among the light irradiated in the omnidirectional direction of the front glass is reflected in the front glass or the image part side by the light sensor Sensing a second process; A third step of recognizing a position on a matrix array of the corresponding light sensor that has performed the sensing operation when the optical sensor generates the detection signal according to the sensing operation of the incoming light through the second process; A fourth step of determining the effectiveness of the sensing operation by comparing the intensity of the corresponding optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light through the second process; And comparing and analyzing signals determined to be valid through the fourth process to detect sensing ports that are uniformly distributed, and recognizing position coordinates on the final matrix array among the sensing coordinates recognized through the third process. And a fifth process of reading the coordinates.

An additional feature of the touch sensing method in the display device using the light source according to the present invention for achieving the above object is that the device (monitor) having a light source and an optical sensor deposited on the front or back of the image portion of the panel Since the light source and the light sensor are formed in a uniform matrix according to the size, no calibration work is performed to obtain characteristic values such as linear response.

The touch panel device of the touch sensing method using light according to the present invention for achieving the above object is characterized in that the image unit for forming a display area in which the pixels representing the brightness and color are arranged in a matrix structure, and the image A touch panel, which is applied to a display element which is located in front of a part and has a front glass for protecting the image part, the touch panel comprising: a matrix arrangement corresponding to an arbitrary area in the display area on the front glass or the back part of the front glass or image part; An optical sensor disposed to sense light flowing into the front glass or the image unit; A sensing detector for recognizing a position on a matrix array of a corresponding optical sensor that has performed a sensing operation when a sensing signal is generated according to a sensing operation for incoming light in the optical sensor; And a valid data processing unit for converting the intensity of the corresponding optical sensing signal into an electrical signal and comparing the intensity of the optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light. There is.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the optical sensor can be operated on a predetermined cycle by an external control signal, the on operation time point Only to perform the sensing operation.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the matrix arrangement of the optical sensor is formed corresponding to only a part of the entire display area. And a coordinate conversion processing unit which receives the data processing results of the sensing detection unit and the data processing unit and converts and outputs the coordinates on the entire display area corresponding to the coordinates of the optical sensor that generated the optical sensing signal that is determined to be valid. have.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the optical sensor has a translucent or transparent matrix pattern on the front or back of the front glass or the image part. It is formed by deposition.

An additional feature of the touch panel device of the touch sensing method using light according to the present invention for achieving the above object is that the optical sensor can sense only a specific frequency (infrared rays, etc.) generated in the human body There is.

An additional feature of the touch panel device of the touch sensing method using light according to the present invention for achieving the above object is that the optical sensor can only sense the optical signal generated from the laser pointer.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the optical sensor is for the screen touch of the light irradiated to the front of the front glass or the image unit It only detects light of a specific frequency reflected by an approaching object and flowing back to the front glass.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is to control the optical sensor, the sensing detector and the effective data processing unit to adjust the threshold input value of the optical sensor. It can be set by the user and program, so that the touch recognition distance can be arbitrarily adjusted.

According to another aspect of the present invention, there is provided a touch-sensing touch panel device using light, including: an image unit in which pixels representing luminance and color are arranged in a matrix structure to form a display area; A touch panel, which is applied to a display element positioned in front of an image part and having a front glass for protecting the image part, comprising: a light source for irradiating light having a specific frequency; The front glass or the front of the image portion is arranged in a matrix arrangement corresponding to any area in the display area, by an object approaching for the screen touch of the light irradiated from the light source irradiated in all directions of the front glass An optical sensor for reflecting light reflected back to the front glass or the image part; A sensing detection unit for recognizing a position on a matrix array of a corresponding optical sensor that has performed a sensing operation when a sensing signal is generated according to a sensing operation of incoming light in the optical sensor; And a valid data processing unit for converting the intensity of the corresponding optical sensing signal into an electrical signal and comparing the intensity of the optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light. There is.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the pixel of the image portion in front of the image portion when the light source is disposed on the image portion and the front glass side In order to irradiate the front of the front glass irradiated light of the light source without blocking the path of the light emitted from.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the optical sensor is deposited in a translucent or transparent matrix pattern on the front or back of the front glass or image portion To be formed.

An additional feature of the touch-sensing touch panel device using light according to the present invention for achieving the above object is that the light source is translucent to the front or rear of the front glass or the image unit together with the optical sensor. It is formed by depositing in a transparent matrix pattern.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the light source and the optical sensor can be operated on a predetermined cycle by an external control signal. In this case, the optical sensor performs a sensing operation only at the time of the ON operation.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the matrix arrangement of the optical sensor is formed corresponding to only a part of the entire display area. The apparatus may further include a coordinate conversion processing unit configured to receive data processing results of the sensing detector and the data processing unit and convert the converted data into coordinate values on the entire display area corresponding to the coordinates of the optical sensor that generated a light sensing signal that is determined to be valid. There is.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is to control the optical sensor, the sensing detector and the effective data processing unit to adjust the threshold input value of the optical sensor. It can be set by the user and program, so that the touch recognition distance can be arbitrarily adjusted.

An additional feature of the touch panel device of the touch sensing method using light according to the present invention for achieving the above object is that the wavelength of the light source can use the frequency of all areas, other than the near infrared rays generally used Infrared rays having a frequency of can be used.

Further additional features of the touch-sensing touch panel device using light according to the present invention for achieving the above object, the solar light which may have a similar frequency and a specific frequency of the light emitted by the light source and The apparatus further includes a cord extension unit for extending a predetermined code to light generated from the light source in order to prevent a sensing error that may occur from indoor light or the like.

Another feature of the touch panel device of the touch sensing method using light according to the present invention for achieving the above object is a backlight unit, and the transmission amount of light irradiated from the backlight unit and located in front of the backlight unit A touch panel applied to a display element having a control unit that displays a luminance and color by forming a display area by arranging pixels in a matrix structure, and a front glass positioned in front of the image unit to protect the image unit. A light source for irradiating light having a specific frequency; The front glass or the front of the image portion is arranged in a matrix arrangement corresponding to any area in the display area, by an object approaching for the screen touch of the light irradiated from the light source irradiated in all directions of the front glass An optical sensor for reflecting light reflected back to the front glass; A sensing detection unit for recognizing a position on a matrix array of a corresponding optical sensor that has performed a sensing operation when a sensing signal is generated according to a sensing operation of incoming light in the optical sensor; And a valid data processing unit for converting the intensity of the corresponding optical sensing signal into an electrical signal and comparing the intensity of the optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light. There is.

An additional feature of the touch panel device of the touch sensing method using light according to the present invention for achieving the above object is that the light source is disposed around the backlight unit.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the optical sensor is deposited in a translucent or transparent matrix pattern on the front or back of the front glass or image portion To be formed.

An additional feature of the touch-sensing touch panel device using light according to the present invention for achieving the above object is that the light source is translucent to the front or rear of the front glass or the image unit together with the optical sensor. It is formed by depositing in a transparent matrix pattern.

A further additional feature of the touch panel device of the touch sensing method using light according to the present invention for achieving the above object is that the light source and the optical sensor is turned on at regular intervals by an external control signal, The optical sensor performs a sensing operation only at an operation time point.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the matrix arrangement of the optical sensor is formed corresponding to only a part of the entire display area. The apparatus may further include a coordinate conversion processing unit configured to receive data processing results of the sensing detector and the data processing unit and convert the converted data into coordinate values on the entire display area corresponding to the coordinates of the optical sensor that generated a light sensing signal that is determined to be valid. There is.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is to control the optical sensor, the sensing detector and the effective data processing unit to adjust the threshold input value of the optical sensor. It can be set by the user and program, so that the touch recognition distance can be arbitrarily adjusted.

An additional feature of the touch panel device of the touch sensing method using light according to the present invention for achieving the above object is that the wavelength of the light source can use the frequency of all areas, other than the near infrared rays generally used Infrared rays having a frequency of can be used.

An additional feature of the touch-sensing touch panel device using light according to the present invention for achieving the above object is that the sunlight and the room may have a similar frequency and a specific frequency of the light emitted by the light source In order to prevent a sensing error that can occur from light, etc. further comprises a code extension for extending a certain code to the light generated from the light source.

An additional feature of the touch-sensing touch panel device using light according to the present invention for achieving the above object is different from the frequency range of the light source of the backlight unit and the light source for touch detection. It is to be irradiated so that mutual interaction between the touch function and the screen display display function is excluded.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the emission time of the backlight unit and the emission time during touch operation on the image unit screen In other words, mutual interference between the backlight unit light source and the light source for touch sensing is excluded.

An additional feature of the touch panel device of the touch sensing method using light according to the present invention for achieving the above object is one or more within a range that does not affect the image quality of the entire frequency of the image frame screen frame. By assigning a frame to the operation region to which the light source is irradiated, the light source is activated within the operating region range, and the backlight unit having the visible light region is deactivated to the light irradiated through the activated operating region of the light source. It is to recognize that it is reflected light by effective light.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the frequency of the corresponding one frame of the entire frame, for example, a screen consisting of 60 frames Based on 60 Hz per second at, and further comprising the backlight unit is activated from 1 frame to 59 frames and the remaining one frame interval is allocated to the operation region of the light source.

An additional feature of the touch sensing device of the touch sensing method using light according to the present invention for achieving the above object is that the remaining one frame of the operating region in which the light source is activated is a sequential pixel of the entire frame. It corresponds to the moment when it is refreshed to the first pixel after passing the ON period.

A feature of the touch-sensing touch panel system using light according to the present invention for achieving the above object is to form a touch panel by applying the techniques of the above-described method and apparatus, and the corresponding image is displayed on the image unit. A program corresponding to an area determined to be touched through a touch panel is loaded to display corresponding information through the image unit.

A feature of the touch sensing fingerprint recognition system using light according to the present invention for achieving the above object is to form a touch panel by applying the techniques of the above-described method and apparatus, the front of the front glass in the optical sensor When the detection signal is generated according to the sensing operation of the incoming light that is reflected by the object approaching the screen touch among the light irradiated to the front glass side, the detection signal of all the optical sensors in a certain area is collected and the finger is touched. When the irradiated light is reflected by the fingerprint ridge of the finger and has the intensity and quantity of the rays returned, the sensed values are connected to the same or similar values in the program to obtain a fingerprint image and use it as the fingerprint recognition sensing. .

A feature of the object area recognition system of the touch sensing method using light according to the present invention for achieving the above object is a touch panel that performs touch sensing of the entire display area by applying the above-described method and device technology. In the case of forming and approaching an object having an arbitrary shape by each independent optical sensor, the shape of the approaching cross section can be similarly recognized to enable sensing input of an area.

A feature of the iris recognition system of the touch sensing method using light according to the present invention for achieving the above object is to form a touch panel by applying the technology of the above-described method and apparatus, the front of the front glass in the optical sensor It is to detect the characteristics of the eye iris through the characteristic analysis on the basis of the detection signal according to the sensing operation for the incoming light is reflected back to the iris of the eye is introduced into the front glass side of the irradiated light.

A feature of the touch panel system of the touch sensing method using light according to the present invention for achieving the above object is to have a structure that does not have a front glass.

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

First of all, in view of the technical concept applied to the present invention, a display device is generally a display device using a cathode ray tube such as a cathode ray tube (CRT) or a vacuum fluorescent display (VFD), a liquid crystal display (LCD) or a polymer (PDLC). The type may be classified into a back light-emitting display device such as a dispersed liquid crystal and a self-light-emitting display device such as a plasma display panel (PDP) or an organic light-emitting diode (OLED) or a field emission display (FED).

The above-mentioned display elements irradiate light because the visual recognition of the object is made through the light, and thus all the display elements irradiate light by themselves or through an auxiliary means, and at least the front of the screen like projection In this method, the light is irradiated by the light source and visually recognized through the reflected light reflected from the screen.

In addition, the touch panel basically recognizes which coordinates the user selects by coordinating a display area in which an image is displayed. For this purpose, the touch panel proposes various conventional methods.

At this time, the light has a characteristic of excellent linearity and reflectivity, and any display element is radiated in all directions in the entire display area, and when an object approaches for the screen touch, the light irradiated by the object is reflected. do.

Therefore, if the present invention detects the light reflected by the approaching object for the screen touch as the coordinate state of the display area and compares and recognizes the area of the light reflected at the closest distance among the light reflected through the approaching object. Any display device such as a flat panel display device and a flat panel CRT can be used as a touch panel.

In addition, the present invention applied by such an idea is expected to be able to touch using a remote system such as a beam point, it is expected that it can be used as a technology such as fingerprint or eye iris recognition.

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

2 is a first embodiment for implementing a touch sensing method using light according to the present invention, which is configured in the housing H of FIG. 1 and expresses a simplified configuration for ease of description. will be.

All displays have an image portion (not given a reference number) in which pixels P representing luminance and color are arranged in a matrix structure to form a display area, and a front glass for protecting the image portion is provided in front of the image portion. FC, which may be embodied integrally with the image part in some cases.

Referring to the configuration shown in FIG. 2 briefly, an optical sensor disposed on a front or rear surface of the front glass or image part in a matrix arrangement corresponding to an arbitrary area in the display area and sensing light flowing into the front glass side ( 113, a sensing detector 120 for recognizing a position on a matrix array of a corresponding optical sensor that performs a sensing operation when a sensing signal is generated according to a sensing operation for incoming light by the optical sensor 113, and the optical sensor ( In operation 113, the valid data processing unit 130 converts the intensity of the light detection signal into an electrical signal and compares it with an intensity of an arbitrary reference signal to determine the validity of the sensing operation. It consists of.

2 is a configuration feature of the embodiment shown in FIG. 2, regardless of any display element, the light emitted from the pixel itself is reflected by an arbitrary object approaching the screen touch and is reflected in the path of the light emitted for display. By detecting the reflected light entering the reverse, the touch panel can not only perform a function as a touch panel even in a real or non-contact state, but also have a simple configuration.

In addition, the configuration shown in FIG. 3, which is different from the above-described embodiment of FIG. 2, is a second embodiment for implementing a touch sensing method using light according to the present invention. The first embodiment shown is touch sensitive to prevent malfunction due to natural light similar to light irradiated from the pixel P of the image portion or to prevent the light irradiated from the pixel P from weakening so that the sensitivity of the reflected light is lowered. Also provided with a separate light source 300 for generating a light of a specific frequency for the case, when the light sensor 113A is also set to a specific frequency to perform a sensing operation only by the light emitted from the light source 300 Yes.

In FIG. 3, it is noted that the pixel P is not illustrated.

In addition, the configuration shown in FIG. 4 is different from the above-described embodiment of FIG. 3, which is a third embodiment for implementing a touch sensing method using light according to the present invention. Although the irradiated light is specialized to light of a specific frequency, similar natural light may exist, thereby adding a cord extension unit 310 to prevent malfunction of touch sensing due to inflow of natural light instead of reflected light. In this case, a specific code is mounted at a frequency of light emitted from the light source 300, and the light sensor 113B, the sensing detector 120, and the effective data processing 130A are provided only when the light is mounted therein. This is an embodiment to operate.

In FIG. 4, it is noted that the pixel P is not illustrated.

In addition, the configuration shown in FIG. 5 attached to another embodiment as described above with reference to FIGS. 2 to 4 is a fourth embodiment for implementing a touch sensing method using light according to the present invention. In the case of a touch panel installed in a public facility, a majority of the touch panels are directly touched by a part of the human body. Instead of using reflected light, a specific frequency generated in the human body is not generated by the optical sensor provided in the above-described embodiment. By implementing the human body light sensor 113C for detecting the infrared rays, when the human body detects the human body light of a certain reference value or more as a part of the human body approaches the screen, it is recognized as a screen touch.

In FIG. 5, it is noted that the pixel P is not illustrated in advance.

In addition, the configuration shown in FIG. 6 attached to the above-described embodiment of FIGS. 2 to 5 as another embodiment is a fifth embodiment for implementing a touch sensing method using light according to the present invention. The present invention seeks to overcome the limitation of recognition of touch through physical contact with the screen.

That is, by changing the type of the optical sensor to the laser light sensor, it can be recognized when the laser light is irradiated from the laser point, which means that it is possible to remote touch at a location having a certain distance on the screen.

The application of the touch method will be widely available for the elderly and the physically handicapped. In the use of interactive TV, the user will be able to maximize the user's convenience by adding a laser point to the TV operation remote control.

In FIG. 6, it is noted that the pixel P is not illustrated.

Hereinafter, a feature of the present invention and its operation will be described, for example, when the above-described embodiments are substantially applied.

The present invention is again applicable to irrespective of the type and type of display elements, and the following description will be given for practical explanation by taking the case of using an LCD type display element as an example.

In addition, in the above embodiment, different reference numbers are assigned to respective elements that perform the same or similar functions. Hereinafter, the reference numbers of the corresponding configurations will be unified as representative reference numbers.

7 is a schematic diagram illustrating an example in which a light source is provided at a side of a TFT substrate when the display device to which the present invention is applied is an LCD, and FIG. 8 is a TFT when the display device to which the present invention is applied is an LCD. FIG. 9 is a schematic diagram illustrating the structure provided by the substrate back side, that is, the direct method. FIG. 9 is a schematic diagram illustrating that a light source is deposited together with an optical sensor on a bottom surface of a TFT substrate when the display device to which the present invention is applied is an LCD. It is an illustration.

10 is a schematic enlarged plan view illustrating a state in which a light sensor according to the present invention is deposited, and FIG. 11 is a schematic enlarged plan view illustrating a state in which a light source is deposited on the same surface as the light sensor of FIG. 10. FIG. 12 is a schematic cross-sectional view illustrating a state in which a light source and an optical sensor are respectively deposited on the bottom surface of the glass, and FIG. 13 may be applied to FIGS. 10 to 11. It is a general separated sectional view which shows the state in which a light source and an optical sensor are deposited on the lower surface side of a TFT substrate board, respectively.

In addition, FIG. 14 is to set the effective range of the light beam irradiated from the light source and the effective range of light irradiated from the light source of the backlight unit to determine the validity of the touch sensing in the present invention, each operation period is divided Fig. 15 is a flow chart showing an example of a frame operating area in the frequency domain schematically showing what is possible, and Fig. 15 is a schematic enlarged plan view showing an optical sensor deposited on the same surface as a pixel of a panel.

In addition, FIG. 16 is an exemplary view schematically illustrating a state in which a pixel is sequentially refreshed and then refreshed from the last pixel to the first pixel, and FIG. 17 is a human body or an object approaching the display panel side by a user. When touched, it shows that at the moment the panel is refreshed, any one of each pixel will be in that pixel, no matter where the user's body or object is located anywhere on the display panel, there will always be at least one refresh pixel in that area. It is an exemplified enlargement example showing that it is possible.

FIG. 18 is an exemplary diagram for setting a threshold input value for determining an effective value of a light beam returned by a human body or an object, and FIG. 19 illustrates an error from an ambient light source in recognizing a light source having a specific frequency as a valid value. It is an exemplary view showing a method of encoding a light source in a way to minimize the.

According to the present invention, as shown in the accompanying drawings, the matrix to be transmitted to the surface of the glass 111 provided on the bottom surface or the upper surface of the TFT substrate 110 constituting the TFT-LCD panel 100 in a grid pattern An optical sensor 113 is provided at countless intersection points between the grids of the matrix pattern 112 to be processed, respectively.

The optical sensor 113 is made of a translucent body or a transparent body, and preferably does not impair the image quality of the image displayed through the TFT-LCD panel 100.

The optical sensor 113 provided as described above recognizes the reflection state of the light rays that are transmitted from the light source 300 to be described later on the part of the object close to the front side of the TFT-LCD panel 100, The signal value may be applied to the sensing detection unit 120.

Meanwhile, in the case of the light source 300, a light ray having an appropriate frequency is irradiated to pass through the TFT-LCD panel 100.

As shown in FIG. 7, the light source 300 is formed on the side surface of the TFT substrate 110 constituting the TFT-LCD panel 100, and is reflected by the reflector 101 which can be provided under the light source 300. After being irradiated to the TFT substrate 110 side or the light source 300 is provided directly below the TFT substrate 110 so that light can pass through the TFT-LCD panel 100 by a direct irradiation method. do.

The light source 300 may uniformly form a semiconductor such as a light emitting photodiode or a transistor on the surface of the TFT substrate 110 or the glass 111 of the TFT-LCD panel 100 through a deposition process in a semiconductor process. There is a wavelength of the light source 300 used for the light output may use the wavelength band of all areas. In addition, it is a matter of course that an infrared ray having a frequency range other than the commonly used near infrared rays can be used.

Such a light source or an optical sensor may be formed on the same surface through the same procedure in the pixel formation process of the TFT-LCD panel manufacturing process.

Here, unlike the above-described structure, the arrangement of the light source 300 is irradiated from the light source 300 with a light source 300 on the side of each optical sensor 113 arranged in plural as shown in FIG. 9. The light beam passing through the TFT-LCD panel 100 through the TFT substrate 110 and then reflected back to an object or a human body that may be located on the front side thereof is provided with an optical sensor 113 provided on the side of the light source 300. It can be provided to be able to receive to) side.

In addition, as shown in FIGS. 9 and 11, the light source 300 and the light sensor 113 are configured in a pair so that the bottom surface of the glass 111 is patterned or the bottom surface of the TFT substrate 110 is patterned. Can be configured.

Reference numeral L in FIGS. 10 to 11 denotes a lead wire, and F denotes a flat cable connection for connecting each lead wire.

After the light is irradiated from the light source 300 by the arrangement of the light source 300, the light is transmitted through the TFT-LCD panel 100 and then reflected back to a human body or an object that is located in proximity, and the returned light is shown in FIG. 7. 9 may be implemented as in FIG. 9.

For example, the light rays emitted from the light source 300 are reflected back to the human body or object and then directed to the TFT substrate 110. The light rays reflected from the most adjacent object, that is, the finger of the human body, are reflected among the re-reflected rays. Is referred to as "a", and various objects that may exist from a distance therefrom, that is, light rays which are re-reflected according to positions away from the TFT-LCD panel 100, respectively, were referred to as "b" and "c".

As shown in the figure, among the rays reflected back to the TFT-LCD panel 100, the re-reflected position from the human body (finger on the drawing) which is in the closest position to each re-reflection position, that is, the TFT-LCD panel 100 as described above. Since the intensity and amount of the reflected rays "a" are larger than the rays "b" and "c", only the rays "a" can be recognized as effective rays in the effective light detection step described later. .

In this way, the light rays emitted from the light source 300, which can be implemented by each example, when the human body or a pen or the like is placed in close proximity so that a program can be displayed on the front side of the TFT-LCD panel 100. As described above, the light beams that are re-reflected to the corresponding positions among the countless optical sensors 113 are received, and the sensing detector 120 recognizes and detects the light beam "a" as the effective light, as in the above example. Then, the position coordinates of the effective light are traced.

In this way, the effective program on the position coordinate tracked by the sensing detection unit 120 is loaded so that the corresponding information can be displayed through the TFT-LCD panel 100.

On the other hand, since the light source provided in the backlight unit provided in the TFT-LCD panel 100 and the light source 300 implemented by the present invention are provided together, it is necessary to distinguish the light rays irradiated from both light sources.

Therefore, the light source provided in the backlight unit has an existing visible light region to be displayed on the screen through the color filter of the TFT-LCD panel 100, and the light source 300 applied by the present invention is a light source for touch detection. While the touch function is expressed, the frequency domain of the light source of the backlight unit and the light source 300 for touch detection 300 are irradiated to be different from each other, so as to exclude mutual interaction between the touch function and the screen display display function. It is characterized by enabling the operation implementation.

In addition, since the light emission time of the visible light source for the screen display, that is, the light emitting time of the backlight unit and the light emitting time during touch operation on the screen are different from each other, mutual interference from each light source is excluded, and thus on the screen of the TFT-LCD panel 100. It can improve the operation accuracy.

For example, as shown in FIG. 14, when the frame frequency of the screen of the TFT-LCD panel 100 is 60 Hz per second, one of them or a plurality of frames within a range that does not interfere with the screen configuration (FRAME) is an operating region of the light source 300 for confirming the presence or absence of touch sensing in the present invention, and the visible light region of the backlight unit used for displaying various information on the screen during the range (period). The light source having the light is off (Off), the light source 300 to be irradiated to detect the touch is approached toward the TFT-LCD panel 100 to turn on (On).

Therefore, as shown in FIG. 14, when V-Sync 60Hz is used as the entire frame 60 per second, the frame is irradiated by the light source of the backlight unit to 59 frames, and then the light source is provided in the remaining 1 frame section. The touch light source 300 is operated so that the light of 300 can be irradiated.

In the above description, the light source of the backlight unit is turned on only in an area of 59 frames and is short-circuited in the other one frame, and the light source 300 for touch sensing is turned on in the one frame section. It is to be (On), because it is made by the on / off by a minute time difference, it is a term selected for the description of the present invention and is not limited thereto.

For example, while the light source of the backlight unit is always on, image information is sequentially displayed by the T-CON chip which is the drive IC of the TFT-LCD panel 100 through each pixel as shown in FIG. 13. It is expressed externally, and this time difference is only a minute difference, so it is recognized to be displayed to the user at the same time.

However, after being turned on through a 59 frame period, the moment of being refreshed to the first pixel as shown in FIG. 12 corresponds to the remaining 1 frame (1/60 second).

The light irradiated from the light source 300 through one frame at this moment and irradiated to enable touch recognition is recognized by the optical sensor 113 as effective light.

That is, in FIG. 16, each pixel is maximized as if it is sequentially turned on when the panel is refreshed. For example, when the body part of the user touches the TFT-LCD panel 100 in close proximity, There is always a refreshing point among the pixels corresponding to the touch point 400 of the user, and the user approaches the TFT-LCD panel 100 by the light of the light source 300 irradiated through the refreshing section. It is to be reflected back to the part of the body to be touched to be recognized as the effective light through the optical sensor 113.

Therefore, even if a user approaches the TFT-LCD panel 100 to form the touch point 400, the number of pixels at the point is innumerable, and the pixel at the moment of refresh is present among the pixels. At that moment, the light of the light source 300 is reflected back to the user's body (for example, a finger) and the returned light reaches the optical sensor 113 to recognize the signal as effective light.

Therefore, the light source of the backlight unit is turned on for the corresponding frame (59 frames) and the program control is performed so that the light of the light source 300 can be irradiated to the remaining frames, or image information is displayed through the pixels of R, GB. When the image information is displayed during the corresponding frame (59 frames), the intensity and amount of the light source 300 which is transmitted again at the moment of being refreshed are relatively large. Is to make this possible.

In this manner, when the light source of the backlight unit and the light source 300 embodied in the present invention are operated for one or a plurality of frames, each pixel of the TFT-LCD panel 100 is the first upper right as shown in FIG. 15. The pixels are sequentially turned on (in the present invention, the expression ON / OFF is used for convenience of understanding) and are configured to form one frame.

Therefore, the body is close to the TFT-LCD panel 100 side of the light irradiated from the light source 300 in the plurality of light sensors 113 that are deposited around when the panel is refreshed and a certain pixel is turned on. It is possible to monitor whether the effective light that is reflected back to a part of the back is detected, so that accurate sensing position can be detected, and the interference is prevented from ambient light that can be irradiated from sunlight or room light, It is possible to exert an excellent effect even when detecting errors such as a sensing input touched at a point other than the pixel.

It can exert its superior performance in single touch sensing.

In addition, as shown in FIG. 18, a threshold input value of an optical sensor sensed by a human body or an object in proximity to the TFT-LCD panel and the other display panel can be set by a user and a program, which is a TFT-LCD panel and another display panel. This means that you can adjust the touch recognition distance between and.

Thus, by setting the threshold input values Vi as shown in FIG. 18, the sensing values of the rays "a", "b", and "c" respectively sensed in FIGS. Can be set.

In addition, as shown in FIG. 19, a predetermined code is placed on a light source having a proper frequency irradiated and deposited on the TFT-LCD panel and the other display panel, and coded and irradiated to generate light to distinguish them from sunlight and indoor light which may have similar frequencies. Sensing errors can be distinguished at the source.

In addition, as shown in FIG. 20, sensing inputs simultaneously touched at one point and two points, such as A, may be simultaneously recognized on a panel deposited by an optical sensor as a matrix on the entire TFT-LCD panel and the other display panel. This is the part where multi-sensing input is possible by each independent optical sensor, and it is possible to recognize any shape (palm) like a similar shape like B. If only the area like the phone shape is deposited, only a certain area is deposited. It can be used not only for area sensing (iconization) but also as a way to exclude unnecessary touch areas.

Also, the light source irradiated when the finger is touched, such as C, has the intensity and amount of light reflected by the fingerprint ridge of the finger and returned to the optical sensor deposited by the matrix. Fingerprint images can be obtained by connecting each other, so it can be used as a fingerprint recognition sensing.

In addition, as a method for recognizing the moment of direct touch on the TFT-LCD panel and the other display panel, an auxiliary sensor may be added to supplement the function. Auxiliary sensors include resistive sensor, capacitive sensor, piezoelectric sensor, ultrasonic sensor, infrared sensor, vibration sensor, nano sensor, position detection sensor, acceleration sensor, proximity sensor, temperature sensor and image sensor. Can be used.

The touch sensing method in the display device using the light source will be described using the TFT-LCD panel 100 and the other display panel having the above-described configuration.

First, in the LCD type display device using the light source provided by the above-described configuration of the present invention, the side surface or the direct method of the TFT substrate 110 or the surface of the glass 111 provided on the bottom surface or the upper surface of the TFT substrate 110. The light output step of outputting the light from the light source 300, which can be provided in each of the optical sensor 113 to be deposited on the light input step, the light input sensing step and the effective light detection step and then to detect the position of the effective light After the location data detection step, a series of processes are performed by the corresponding data output and display steps.

As described above, the light output step may be provided on the side or directly under the TFT substrate 110 or may be provided in a lattice shape on the rear surface of the glass 111 provided on the TFT substrate 110 or its upper surface as described above. Light rays are irradiated from the light sources 300 respectively provided on each side of the myriad photosensors 113 arranged in a patterned matrix.

Such a light beam is a light beam having an appropriate frequency band so that each of the above-described optical sensors 113 is set by the readable frequency band.

In the optical input sensing step, an object positioned on the front side of the TFT-LCD panel 100, that is, a TFT-LCD, is irradiated with light having a predetermined frequency band emitted from the light source 300 in the optical output step. The light source 300 is applied to an object such as a human body or a pen that is close to the touch panel 100 to have an effect of touching the TFT-LCD panel 100 when the panel 100 is touched or not touched directly. (A) is a step of sensing and inputting light beams reflected from the light beams reflected from the TFT and returning to the TFT-LCD panel 100 side.

The optical sensor 113 employed in the optical input sensing step is used as a photo sensor in the present invention, and of course, the sensor may be implemented as a replaceable sensor.

On the other hand, the optical sensor 113, such as the photosensor, is uniformly distributed to the TFT substrate 110 or the glass 111 through the deposition process in the semiconductor process, and then reflected back from the human body or the object. Allows the sensing of light rays with an appropriate frequency range.

As such, the intensity or amount of the returned rays may vary, for example, the intensity and amount of the rays reflected back to the human body or an object closest to the TFT-LCD panel 100 and require a touch sensing operation, and the touch sensing operation. The intensity and amount of light reflected back from various objects existing near, near, or far away from an object that requires a distance may vary.

That is, as in the case of FIGS. 7 to 9, the intensity and amount of the infrared ray “a” are relatively larger than those of the infrared rays “b” and “c” illustrated.

Therefore, as shown in the case of FIGS. 7 to 9, various light rays that are returned are sensed, converted into different electrical signals, and then passed through a series of processes to transmit the signal values to the data processing unit 130.

In the effective light detecting step, as described above, the light beams returned to the TFT-LCD panel 100 are sensed and converted into different electrical signals, and then the signal values communicated to the data processing unit 130 are processed to process the signal values. Means detecting a valid light beam.

Here, the light beam is reflected back to the human body or object located near the front side of the TFT-LCD panel 100, and converts the signal value received at the optical sensor 113 side into an electrical signal. Of course, the difference between the intensity and the amount of light reflected back from the human body or the object that is touched closest to (100), and the intensity and amount of the light reflected again as the distance from the TFT-LCD panel 100 is generated, of course. In the present invention, the electric signal for each region is distinguished and converted according to the difference in the intensity and amount of the light beam reflected back to the TFT-LCD panel 100 in this way.

As described above, the signals are converted into different electrical signals according to the intensity and quantity of the rays to be returned. As described above, the converted signal values are inputted to the data processing unit 130 for data communication, and then arithmeticly processed. The effective light is detected by tracking a signal value having (e.g., the condition or magnitude of the signal having the best value among the received signal values).

Therefore, the effective light in the case of the attached FIGS. 7 to 9 is "a".

The position data detection step refers to a step of detecting a position at which the effective light (that is, the "a" light beam in the drawing) received by the effective light detection step is received.

When the light beam recognized as the effective range is detected by the effective light detecting step, the detected signal is analyzed by the data processing unit 130 and may be configured as an optical sensor 113 that may be uniformly distributed. By detecting the sensing port of, we can calculate the exact coordinate position.

In the data output and display step, the exact location information detected through the location data detection step as described above is transmitted to a control unit (not shown) of the main board using a communication port using wired or wireless communication. The program is processed by interlocking to express the exact position of the image touched on the TFT-LCD panel 100 and the other display panel and output the information image in the corresponding area.

At this time, the information image refers to a predictable image, video, or voice output form of data such as information that can be displayed and displayed by driving a program by loading a video or an already installed program.

While the invention has been shown and described in connection with specific embodiments thereof, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

1 is an exemplary view for explaining the appearance and usage of a general touch panel

Figure 2 is a first embodiment for implementing a touch sensing method using light according to the present invention

3 is a second exemplary embodiment for implementing a touch sensing method using light according to the present invention;

4 is a third exemplary embodiment for implementing a touch sensing method using light according to the present invention.

5 is a fourth exemplary embodiment for implementing a touch sensing method using light according to the present invention.

6 is a fifth exemplary embodiment for implementing a touch sensing method using light according to the present invention.

7 is a schematic diagram illustrating an example in which a light source is provided on a side of a TFT substrate when the display device to which the present invention is applied is an LCD;

8 is a schematic diagram illustrating an example in which a light source is provided by a rear side of a TFT substrate, that is, a direct method when the display device to which the present invention is applied is an LCD.

9 is a schematic diagram illustrating an example in which a light source is deposited together with an optical sensor on a bottom surface of a TFT substrate when the display device to which the present invention is applied is an LCD.

10 is a schematic enlarged plan view showing a state in which an optical sensor is deposited according to the present invention;

11 is a schematic enlarged plan view showing a state in which a light source is deposited on the same surface as the optical sensor of FIG. 10.

FIG. 12 is a schematic cross-sectional view illustrating a state in which a light source and an optical sensor are respectively deposited on the bottom surface of the glass, which may be applied to FIGS. 10 to 11.

FIG. 13 is a schematic separation cross-sectional view illustrating a state in which a light source and an optical sensor are respectively deposited on a bottom surface of a TFT substrate, which may be applied to FIGS. 10 to 11.

14 is to set the effective range of the light beam irradiated from the light source and the effective range of light irradiated from the light source of the backlight unit to determine the validity of the touch sensing in the present invention, so that each operation period is distinguished Flowchart showing an example of the frame operation region in the frequency domain schematically showing

FIG. 15 is a schematic enlarged plan view showing an optical sensor deposited on the same surface as a pixel of a panel; FIG.

FIG. 16 is a diagram schematically illustrating a state in which a corresponding pixel is sequentially refreshed and then refreshed from the last pixel to the first pixel.

FIG. 17 illustrates that when a human body or an object is touched by a user in close proximity to the display panel, the user's human body or an object may be in the corresponding pixel of each pixel at the moment the panel is refreshed. A virtual enlarged view showing that there may always be at least one refresh pixel in the area, even if located anywhere

18 is a diagram for setting a threshold input value for determining a valid value of a ray returned by a human body or an object;

19 is a diagram illustrating a method of encoding a light source as a method for minimizing an error from an ambient light source in recognizing a light source having a specific frequency as a valid value.

20 is a schematic diagram of multi-touch input sensing and specific shape or area input sensing and fingerprint sensing;

※ Explanation of code for main part of drawing

100; TFT-LCD panel 101; Reflector

110; TFT substrate 111; Glass

112; Matrix patterns 113,113A, 113B, 113C; Light sensor

120; Sensing detection unit 130,130A, 130B, 130D; Valid data processing section

200; A backlight unit 300; Light source

310; Cord extension 400; Touch point

Claims (46)

delete In the touch sensing method applied to a display element having pixels representing luminance and color arranged in a matrix structure to form a display area, and a front glass positioned in front of the image part to protect the image part. In: Arrange a plurality of light sources for irradiating light having a specific frequency preset by the user on the side of the image portion and the front glass, and corresponding to any area in the display area on the front or back of the front glass or image portion Placing the photosensors in a matrix arrangement; Light emitted from the light source disposed through the first process and reflected by an object approaching for the screen touch among the light irradiated in the omnidirectional direction of the front glass is reflected in the front glass or the image part side by the light sensor Sensing a second process; A third step of recognizing a position on a matrix array of the corresponding light sensor, which has performed the sensing operation, when the optical sensor generates the detection signal according to the sensing operation of the incoming light through the second process; A fourth step of determining the effectiveness of the sensing operation by comparing the intensity of the corresponding optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light through the second process; And Comparing and analyzing the signals determined to be valid through the fourth process, the sensing ports are uniformly distributed, and the position coordinates on the final matrix array are recognized among the sensing coordinates recognized through the third process to determine coordinates on the entire display area. And a fifth process of reading out the touch sensing method of the display apparatus using the light source. In the touch sensing method applied to a display element having pixels representing luminance and color arranged in a matrix structure to form a display area, and a front glass positioned in front of the image part to protect the image part. In: A first process of disposing a light sensor and a light source irradiating light having a specific frequency in a matrix arrangement on a front surface or a rear surface of the front glass or the image portion in correspondence with an arbitrary area in the display area; Light emitted from the light source disposed through the first process and reflected by an object approaching for the screen touch among the light irradiated in the omnidirectional direction of the front glass is reflected in the front glass or the image part side by the light sensor Sensing a second process; A third step of recognizing a position on a matrix array of the corresponding light sensor, which has performed the sensing operation, when the optical sensor generates a detection signal according to the sensing operation of the incoming light through the second process; A fourth step of determining the effectiveness of the sensing operation by comparing the intensity of the corresponding optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light through the second process; And Comparing and analyzing the signals determined to be valid through the fourth process, the sensing ports are uniformly distributed, and the position coordinates on the final matrix array are recognized among the sensing coordinates recognized through the third process to determine coordinates on the entire display area. And a fifth process of reading out the touch sensing method of the display apparatus using the light source. The method according to any one of claims 2 to 3, The device (monitor) having a light source and an optical sensor deposited on the front glass further includes a data processing process for performing calibration operations to obtain characteristic values such as a sensing area and a linear response. Touch sensing method on device. An image unit in which a backlight unit and a pixel, which is located in front of the backlight unit and controls the amount of light emitted from the backlight unit to express luminance and color, are arranged in a matrix structure to form a display area; In the touch sensing method applied to a display element which is located on the front surface and has a front glass for protecting the image portion: Arrange a light source for irradiating light having a predetermined frequency preset by the user around the side and the back of the backlight unit, and the light sensor corresponding to any area in the display area on the front or back of the front glass or image portion Placing in a matrix array; Light emitted from the light source disposed through the first process and reflected by an object approaching for the screen touch among the light irradiated in the omnidirectional direction of the front glass is reflected in the front glass or the image part side by the light sensor Sensing a second process; A third step of recognizing a position on a matrix array of the corresponding light sensor, which has performed the sensing operation, when the optical sensor generates the detection signal according to the sensing operation of the incoming light through the second process; A fourth step of determining the effectiveness of the sensing operation by comparing the intensity of the corresponding optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light through the second process; And By comparing and analyzing the signals determined to be valid through the fourth process, the sensing ports are uniformly distributed, and by detecting the position coordinates on the final matrix array among the sensing coordinates recognized through the third process, the coordinates on the entire display area are determined. And a fifth process of reading out the touch sensing method of the display apparatus using the light source. An image unit in which a backlight unit and a pixel, which is located in front of the backlight unit and controls the amount of light emitted from the backlight unit to express luminance and color, are arranged in a matrix structure to form a display area; In the touch sensing method is applied to a display element which is located at and having a front glass for protecting the image portion: A first process of arranging a light source for irradiating light having a specific frequency preset by a light sensor and a user in an array of one or a plurality of matrices on a front surface or a rear surface of the front glass or the image portion corresponding to an arbitrary area in the display area. and; Light emitted from the light source disposed through the first process and reflected by an object approaching for the screen touch among the light irradiated in the omnidirectional direction of the front glass is reflected in the front glass or the image part side by the light sensor Sensing a second process; A third step of recognizing a position on a matrix array of the corresponding light sensor, which has performed the sensing operation, when the optical sensor generates the detection signal according to the sensing operation of the incoming light through the second process; A fourth step of determining the effectiveness of the sensing operation by comparing the intensity of the corresponding optical sensing signal with an intensity of an arbitrary reference signal when the sensing signal is generated according to the sensing operation of the incoming light through the second process; And Comparing and analyzing the signals determined to be valid through the fourth process, the sensing ports are uniformly distributed, and the position coordinates on the final matrix array are recognized among the sensing coordinates recognized through the third process to determine coordinates on the entire display area. And a fifth process of reading out the touch sensing method of the display apparatus using the light source. The method according to claim 5 or 6, The device (monitor) having the light source and the light sensor deposited on the front or the back of the image part is formed in a uniform matrix according to the size of the panel, so that calibration work for obtaining characteristic values such as linear response is performed. Touch sensing method in a display device using a light source, characterized in that not performed. delete delete delete delete An image unit in which luminance and color pixels are arranged in a matrix structure to form a display area, and a front glass positioned on the front side of the image unit to protect the image unit, and the front glass or the front side of the image unit or An optical sensor disposed on a rear surface of the display area corresponding to an arbitrary area of the display area and sensing light flowing into the front glass or the image part; A sensing detector configured to recognize a position on a matrix array of a corresponding optical sensor that has performed a sensor operation when a sensing signal is generated according to a sensing operation of incoming light in the optical sensor; And an effective data processing unit for converting the intensity of the corresponding optical sensing signal into an electrical signal and comparing the intensity of the optical signal with an arbitrary reference signal to determine the validity of the sensing operation when the sensing signal is generated according to the sensing operation of the incoming light. In the touch sensing type touch panel device using light, The optical sensor is a touch panel device of the touch sensing method using light, characterized in that to sense only a specific frequency (infrared light) generated in the human body. The method of claim 12, The optical sensor is a touch panel device of the touch sensing method using light, characterized in that for sensing only the optical signal generated by the laser pointer. The method of claim 12, The optical sensor senses only light of a specific frequency that is reflected by an object approaching the screen touch among the light irradiated to the front of the front glass or the image part and flows back into the front glass. Type touch panel device. The method of claim 12, Touch sensing type touch panel using light, characterized in that by controlling the optical sensor, the sensing detection unit and the effective data processing unit, the threshold input value of the optical sensor can be set by a user and a program. Device. Pixels expressing luminance and color are arranged in a matrix structure to form a display area, and a touch panel applied to a display device having a front glass for protecting the image part and positioned in front of the image part. In: A light source for irradiating light having a specific frequency; The front glass or the front of the image portion is arranged in a matrix arrangement corresponding to any area in the display area, by an object approaching for the screen touch of the light irradiated from the light source irradiated in all directions of the front glass An optical sensor for reflecting light reflected back to the front glass or the image part; A sensing detection unit for recognizing a position on a matrix array of a corresponding optical sensor that has performed a sensing operation when a sensing signal is generated according to a sensing operation of incoming light in the optical sensor; And When the detection signal is generated according to the sensing operation for the incoming light in the optical sensor includes a valid data processing unit for converting the intensity of the corresponding optical detection signal into an electrical signal and comparing it with the intensity of an arbitrary reference signal to determine the validity of the sensing operation Touch panel device of the touch sensing method using light. The method of claim 16, When the light source is disposed on the side of the image portion and the front glass, a reflecting plate for irradiating the irradiation light of the light source to the front of the front glass without blocking the path of the light emitted from the pixels of the image portion on the front of the image portion Touch sensing device of the touch sensing method using light, characterized in that it further comprises. The method of claim 16, The optical sensor is a touch sensing device using a touch sensing method using light, characterized in that formed on the front or back of the front glass or the image portion is deposited in a translucent or transparent matrix pattern. The method of claim 16 or 18, And the light source is formed on the front or rear surface of the front glass or the image unit together with the optical sensor in a translucent or transparent matrix pattern. The method of claim 16, The light source and the light sensor may be turned on at regular intervals by an external control signal, and the light sensor is configured to perform a sensing operation only at an on time. The method of claim 16, When the matrix arrangement of the optical sensor is formed to correspond to only a part of the entire display area, the sensor unit receives the data processing results of the sensing detector and the data processor to generate coordinates of the optical sensor that generate an optical sensing signal determined to be valid. And a coordinate conversion processing unit for converting the coordinate values on the corresponding entire display area and outputting the coordinate values. The method of claim 16, Touch sensing type touch panel using light, characterized in that by controlling the optical sensor, the sensing detection unit and the effective data processing unit, the threshold input value of the optical sensor can be set by a user and a program. Device. The method of claim 16, The wavelength of the light source may use the frequency of all the band, the touch sensing device of the touch sensing method using light, characterized in that the infrared rays having a frequency other than the commonly used near infrared. The method of claim 16, The apparatus further includes a cord extension unit for extending a predetermined code to light generated from the light source to prevent sensing errors that may occur from sunlight and room light, which may have a frequency similar to a specific frequency of light emitted from the light source. Touch sensing device of the touch sensing method using light, characterized in that. An image unit in which a backlight unit and a pixel, which is located in front of the backlight unit and controls the amount of light emitted from the backlight unit to express luminance and color, are arranged in a matrix structure to form a display area; In the touch panel is applied to a display element which is located at and having a front glass for protecting the image portion: A light source for irradiating light having a specific frequency; The front glass or the front of the image portion is arranged in a matrix arrangement corresponding to any area in the display area, by an object approaching for the screen touch of the light irradiated from the light source irradiated in all directions of the front glass An optical sensor for reflecting light reflected back to the front glass; A sensing detection unit for recognizing a position on a matrix array of a corresponding optical sensor that has performed a sensing operation when a sensing signal is generated according to a sensing operation of incoming light in the optical sensor; And When the detection signal is generated according to the sensing operation for the incoming light in the optical sensor includes a valid data processing unit for converting the intensity of the corresponding optical detection signal into an electrical signal and comparing it with the intensity of an arbitrary reference signal to determine the validity of the sensing operation Touch panel device of the touch sensing method using light. 26. The method of claim 25, The touch panel device of the touch sensing method using light, characterized in that the light source is disposed around the backlight unit. 26. The method of claim 25, The optical sensor is a touch sensing device using a touch sensing method using light, characterized in that formed on the front or back of the front glass or the image portion is deposited in a translucent or transparent matrix pattern. The method of claim 25 or 27, And the light source is formed on the front or rear surface of the front glass or the image unit together with the optical sensor in a translucent or transparent matrix pattern. 26. The method of claim 25, And the light source and the light sensor are turned on at regular intervals by an external control signal, and the light sensor performs a sensing operation only at the time of the on operation. 26. The method of claim 25, When the matrix arrangement of the optical sensor is formed to correspond to only a part of the entire display area, the sensor unit receives the data processing results of the sensing detector and the data processor to generate coordinates of the optical sensor that generate an optical sensing signal determined to be valid. And a coordinate conversion processing unit for converting the coordinate values on the corresponding entire display area and outputting the coordinate values. 26. The method of claim 25, Touch sensing type touch panel using light, characterized in that by controlling the optical sensor, the sensing detection unit and the effective data processing unit, the threshold input value of the optical sensor can be set by a user and a program. Device. 26. The method of claim 25, The wavelength of the light source may use the frequency of all the band, the touch sensing device using a touch sensing method using light, characterized in that the infrared having a frequency other than commonly used near infrared. 26. The method of claim 25, The apparatus further includes a cord extension unit for extending a predetermined code to light generated from the light source to prevent sensing errors that may occur from sunlight and room light, which may have a frequency similar to a specific frequency of light emitted from the light source. Touch sensing device of the touch sensing method using light, characterized in that. 26. The method of claim 25, In the touch sensing method using light, the light source of the backlight unit and the frequency range of the light source for touch detection are irradiated differently so that mutual interference between the touch function and the screen display display function is excluded. Touch panel device. 26. The method of claim 25, Touch sensing using light, characterized in that mutual light emission between the light source for the backlight unit and the light source for touch sensing is excluded by changing the light emitting time of the backlight unit and the light emitting time during touch operation on the image panel panel. Type touch panel device. 26. The method of claim 25, One or a plurality of frames are allocated to an operation region to which the light source is irradiated within a range that does not affect image quality among all frequencies of the image unit screen frame, so that the light source is activated within the operating region range and has a visible light region. And a light source of the backlight unit is deactivated to recognize that the light source is reflected back by the light irradiated through the active region of the light source as effective light. The method of claim 36, The frequency of one frame of the entire frame further comprises the region from the first frame to the last frame of the frame set per second is activated by the backlight unit, and further allocated to the operation region of the light source in the frame of the last section Touch panel device of the touch sensing method using light. The method of claim 37, The last last frame of the operation region in which the light source is activated corresponds to the moment when each pixel in the entire frame is sequentially turned on and then refreshed to the first pixel. Touch panel device. delete The method of claim 16 or 25, Touch sensing device using a touch sensing method using the light, characterized in that for adding a secondary sensor to recognize the moment touched directly on the touch panel. delete delete delete delete delete delete

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