KR101659476B1 - 3 dimension touch screen panel - Google Patents

3 dimension touch screen panel Download PDF

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Publication number
KR101659476B1
KR101659476B1 KR1020160000440A KR20160000440A KR101659476B1 KR 101659476 B1 KR101659476 B1 KR 101659476B1 KR 1020160000440 A KR1020160000440 A KR 1020160000440A KR 20160000440 A KR20160000440 A KR 20160000440A KR 101659476 B1 KR101659476 B1 KR 101659476B1
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KR
South Korea
Prior art keywords
touch
lcd module
cover
layer
pressure sensing
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Application number
KR1020160000440A
Other languages
Korean (ko)
Inventor
한승준
Original Assignee
(주)멜파스
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Publication date
Application filed by (주)멜파스 filed Critical (주)멜파스
Priority to KR1020160000440A priority Critical patent/KR101659476B1/en
Application granted granted Critical
Publication of KR101659476B1 publication Critical patent/KR101659476B1/en
Priority to PCT/KR2016/011994 priority patent/WO2017104963A1/en
Priority to US16/061,843 priority patent/US20190004630A1/en
Priority to CN201680073082.XA priority patent/CN108369468B/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Abstract

According to an embodiment of the present invention, there is provided a three-dimensional touch screen panel including: a screen cover; a touch sensing unit positioned below the screen cover and detecting a touch position with respect to the screen cover; And a middle frame housing the screen cover and the LCD module, wherein the LCD module includes an LCD panel including a first glass layer and a second glass layer positioned between the liquid crystal layer and the liquid crystal layer, A pressure sensing layer of a conductive material positioned below the second glass layer and an LCD module cover of a conductive material for housing the LCD module, the pressure sensing layer being spaced apart from a bottom surface of the LCD module cover, A signal corresponding to the capacitance that varies depending on the magnitude of the touch pressure applied to the screen cover is output It provides a three-dimensional touch screen panel.

Description

A three-dimensional touch screen panel {3 Dimension Touch Screen Panel}

The present invention relates to a three-dimensional touch screen panel capable of simultaneously detecting pressure and touch.

In addition to the development of mobile communication technology, electronic information terminals such as mobile phones, PDAs, and navigation devices have been expanded from simple character information display means to more various and complex multimedia providing means such as audio, video, I am going out. With the development of the multimedia function, a larger display screen is required to be implemented within a limited size of the electronic information terminal, and accordingly, a display device using a touch panel is more popular.

A touch screen panel on which a touch panel is stacked on a liquid crystal display is an input device that recognizes the position of a touch event and transmits it to the system when a user touches the screen with a finger or a pen on the screen. By integrating the screen and coordinate input means, there is an advantage in that space can be saved as compared with the conventional key input method. Therefore, the electronic information terminal with the touch screen panel is increasingly used because it can further increase the screen size and user's convenience.

The touch screen panel can be classified into a resistive type, a capacitive type, an infrared type, an SAW (Surface Acoustic Wave type), an electromagnetic induction type (Electro Magnetic type) , Acoustic pulse recognition type (APR), and optical type.

As shown in Fig. 1, the resistance film method uses a principle that the resistance value between the electrodes is changed by pressure by touching the touch panel surface with a finger or a pen. Two electrodes, each of which has a transparent electrode, are covered with a thin film of glass or a film. When the corresponding part of the cover in which the pressure is generated is brought into contact with the electrode, a potential difference is generated at the pressed point, and the point is detected and operated. The capacitance type uses a change in capacitance caused when a finger touches the touch panel. Currently, many smart phones are using capacitive touch panels and their demand is rapidly increasing.

The capacitance type is divided into surface type and projection type. First, as shown in Fig. 2, the surface type is a structure in which a transparent electrode film is covered on a substrate with a protective cover on its surface. Voltage is applied to the electrodes provided at the four corners of the substrate to generate uniform electricity throughout the panel. Touching a finger on the surface of the touch panel will change the capacitance, and the current flowing between the four-wire electrodes will change so that the position of the touch point can be determined. The surface type is composed of a relatively simple structure and can be used at low cost. However, it is difficult to realize a multi-touch function for recognizing a plurality of touch points at the same time. As shown in FIG. 3, the projection type adopts a structure in which a plurality of transparent electrodes are provided on a glass substrate in a specific pattern and the surface is covered with a cover. When a finger is close to the surface of the touch panel, the capacitance between the surrounding electrodes at the touch point changes, and the position of the touch point can be confirmed.

As shown in Fig. 4, the ultrasonic method searches for the touched position by using the glass surface to be absorbed by the finger touching the touch panel. This method is easy to secure durability because it can use the glass on the front of liquid crystal display panel directly as touch screen without using electricity or scientific processing. In addition, the light transparency is not lost by the electrodes, thereby providing a clear display image quality. Acoustic wave method detects that the acoustic vibration generated when a finger touches the surface of the touch panel is transmitted to the panel and finds the touch position by analyzing the signal. Like the ultrasonic method, the liquid crystal glass panel can be used as a touch screen without being processed. SAW (Surface Ultrasonic) touch screen panels use a pure glass structure to provide excellent image clarity. SAW technology uses ultrasonic waves through the touch screen panel. When the user touches the panel, a part of the ultrasonic waves is absorbed, and the change of the ultrasonic waves recognizes the position of the touch event and processes the information to detect the touch position.

As shown in FIG. 5, the infrared method detects a change in light moving along the surface using a light emitting element and a light sensitive element attached to the periphery of a touch panel to find a touched position. The surface of the panel is suitable for outdoor installation or equipment operated by a large number of people because the detection function due to dust is not lost. The infrared method forms an infrared lighting grid in front of the display screen and depends on the disturbance of the illumination grid. The touch frame contains a series of infrared LEDs and phototransistors and is mounted on opposite sides to create an invisible infrared light grid. The frame body is composed of a wiring board on which an electronic device is mounted and hidden behind a bezel through which infrared rays are transmitted. When the fingers interfere with the rays of the infrared illumination grid, the phototransistor detects the absence of illumination and transmits a signal identifying the coordinates.

In the electromagnetic induction method, an electromagnetic wave is sensed by a sensor attached to a touch panel using a dedicated stylus for generating a magnetic field to search for a touch point.

The optical touch screen panel is equipped with optical sensors on both corners of the screen and detects objects touching the screen at both angles. It recognizes the object very accurately without touching the screen with a finger or a stylus pen. Optical touch screen panels boast exceptional precision and can detect multiple touch points.

Resistive type and capacitive type are classified into an attachment type in which a touch screen is attached and an integral type in which a touch screen and a panel are integrated. If the display and the touch panel are integrated, the number of parts can be reduced and the product can be made slimmer and lighter. In addition, the number of parts placed on the front of the display can be reduced, and the image quality can be expected to be increased. The integration of touch panel and display has 'In-cell' technology which integrates touch panel function into pixel of liquid crystal and 'On-cell' technology which makes touch panel function between color filter substrate and polarizer.

The capacitive touch screen panel can be classified into three categories: attachment type, cover window type, and display type. The attachment type is largely a film type and a glass type. In the film method, ITO patterning is implemented on a film, and there is a GFF structure and a GF2 structure. In the glass method, ITO is patterned in a glass, and there are a GG structure and a GG2 structure. The GFF structure is a general touch panel structure in which one glass and two ITO films are used to pattern the X-axis sensor and the Y-axis sensor on two ITO films, respectively, and then the glass is bonded. The GF2 structure is made by attaching one glass and one double-sided ITO film to the cover glass after patterning the X-axis sensor and the Y-axis sensor on both sides of the film.

The cover window integral type has a structure of G1F, G2 and G1 in a manner of forming a sensor by patterning on a transparent electrode deposited on a cover window. The G1F method uses a single piece of glass and a film. ITO is deposited on the backside of the cover window, and the ITO film is used to pattern the X-axis and Y-axis sensors on the ITO and ITO films deposited on the cover window glass. The G1 method is fabricated by depositing a layer of ITO on the backside of the cover window and patterning the X / Y sensor on ITO.

Such a conventional touch panel can only acquire a touch event and a position, but can not detect the magnitude of pressure applied to the panel at the time of a touch event. This is a disadvantage that it is difficult to cope with the need to touch more to implement a three-dimensional user interface or to display various menus on a display screen. Accordingly, it is required to develop a touch panel capable of measuring not only a touch event position but also a touch pressure.

Korean Patent Publication No. 10-2015-0052906 Korean Registered Patent No. 10-1452302 Korean Patent No. 10-1115421

It is an object of the present invention to provide a three-dimensional touch screen panel capable of sensing a touch event and a touch position on a touch screen panel, as well as a magnitude of a pressure upon touch with a simple structure.

According to an embodiment of the present invention, there is provided a display device including a screen cover, a touch sensing unit positioned below the screen cover and detecting a touch position with respect to the screen cover, an LCD module positioned below the touch sensing unit, And a middle frame housing the LCD module, wherein the LCD module includes an LCD panel including a first glass layer and a second glass layer positioned between the liquid crystal layer and the liquid crystal layer, a second glass layer positioned below the second glass layer, And a pressure sensitive layer of a conductive material for housing the LCD module, wherein the pressure sensing layer is spaced apart from a bottom surface of the LCD module cover, and a pressure sensitive layer Dimensional touch screen panel that outputs a signal corresponding to a capacitance that varies according to The ball.

And the LCD module cover of a conductive material is set to a ground or set voltage.

In the three-dimensional touch screen panel according to an exemplary embodiment of the present invention, the pressure sensing layer may have a plurality of through-holes formed at the edge to the center, and the plurality of through-holes may have a pressure And a sensing layer.

According to an embodiment of the present invention, it is possible to provide a three-dimensional touch screen panel capable of sensing a touch event and a touch position on a touch screen panel as well as a magnitude of a pressure upon touch.

According to the embodiment of the present invention, it is possible to detect the magnitude of the touch pressure by using the conductive cover of the LCD panel without separately arranging the conductor member for deriving the change in the capacitance according to the displacement of the pressure sensing layer together with the pressure sensing layer . Accordingly, the manufacturing process of the three-dimensional touch screen panel can be simplified and the manufacturing cost can be reduced.

Figures 1 to 5 schematically illustrate a touch screen panel,
FIG. 6 is a cross-sectional view schematically showing a three-dimensional touch screen panel according to an embodiment of the present invention,
7 is a cross-sectional view schematically illustrating an LCD module and a touch sensing unit according to an embodiment of the present invention.
8 and 9 are cross-sectional views schematically showing an LCD module according to an embodiment of the present invention,
FIG. 10 is a front view schematically showing a pressure sensing layer according to an embodiment of the present invention, and FIG.
11 is a front view schematically illustrating a pressure sensing layer according to an embodiment of the present invention.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

The three-dimensional touch screen panel described below is a device capable of recognizing up to the intensity of the conventional touch input (pressure intensity). The touch screen panel described below may include a configuration for determining the presence or absence of a touch or the position of a touch as in a conventional touch screen panel. Hereinafter, a configuration for determining the presence or absence of a conventional touch or the position of a touch is referred to as a touch sensing unit. In the embodiment of the present invention, it is preferable that the touch sensing unit uses a capacitance method. The capacitive touch screen panel can be classified into three categories: attachment type, cover window type, and display type. The attachment type is largely a film type and a glass type. The electrostatic capacity type is classified into a self-capacitive type using its own electrostatic capacity and a mutual-capacitive type using mutual capacitance. In the embodiment of the present invention, the touch sensing part can be widely applied without being limited thereto including the above- .

The three-dimensional touch screen panel according to the embodiment of the present invention can be applied to an electronic device providing a touch screen such as a smart phone, a tablet PC, a PDA, a notebook, and the like.

The following description relates to a touch screen panel for measuring the intensity of a touch pressure. Hereinafter, a detailed description of a conventional touch sensing unit will be omitted.

A three-dimensional touch screen panel according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 6 is a cross-sectional view schematically showing a three-dimensional touch screen panel according to an embodiment of the present invention, and FIGS. 7 to 9 show cross sections of an LCD module 100 according to an embodiment of the present invention.

6, a three-dimensional touch screen panel according to an exemplary embodiment of the present invention includes a screen cover 210, a touch sensing unit 130, an LCD panel including a pressure sensing layer 120 and a conductive cover 140, a support frame 220, an adhesive member 250, a reflector 260, a PCB module 230, and a control IC 240.

7 to 9 show cross sections of an LCD module 100 according to an embodiment of the present invention. 7 is a cross-sectional view illustrating a touch sensing unit 130 and an LCD module 100 of an ADD-ON type touch screen. The touch sensing unit 130 is bonded on the LCD module 110. In the case of the add-on type, the touch panel and the LCD panel including the touch sensing unit 130 are manufactured and then attached. 7, the LCD module 100 according to the embodiment of the present invention includes a first polarizer, a first glass layer, a liquid crystal layer, a second glass layer, Glass and a second polarizing layer are coupled to the pressure sensing layer 120 and the pressure sensing layer 120 is coupled to the lower portion thereof and the backlight unit 140 is disposed apart from the pressure sensing layer 120. And an LCD module cover 160 of a conductive material houses the layers. A spacing member 170 is coupled between the pressure sensing layer 120 and the backlight unit 140 to maintain a gap between the pressure sensing layer 120 and the backlight unit 140. As the spacing member 170, a double-sided adhesive tape (DAT) or the like may be used. The backlight unit 140 is attached to the bottom surface of the LCD module cover 160. The backlight unit 140 may include several optical components. The pressure sensing layer 120 faces the LCD module cover 160 made of a conductive material with the backlight unit 140 interposed therebetween.

8 is a cross-sectional view illustrating an LCD module 100 of an ON-CELL type touch screen, in which the touch sensing unit 130 'is embedded in an LCD panel. The on-cell type touch sensing unit 130 'is manufactured by depositing ITO on the upper glass layer among the glass layers sandwiching the liquid crystal layer. A polarizing layer is coupled to the touch sensing unit 130 ', and a polarizing layer is coupled to the lower glass layer. And the pressure sensing layer 120 is coupled to the lower side of the polarizing layer. The backlight unit 140 is disposed apart from the pressure sensing layer 120. And an LCD module cover 160 of a conductive material houses the layers. A spacing member 170 is coupled between the pressure sensing layer 120 and the backlight unit 140 to maintain a gap between the pressure sensing layer 120 and the backlight unit 140. As the spacing member 170, a double-sided adhesive tape (DAT) or the like may be used. The backlight unit 140 is attached to the bottom surface of the LCD module cover 160. The backlight unit 140 may include several optical components. The pressure sensing layer 120 faces the LCD module cover 160 made of a conductive material with the backlight unit 140 interposed therebetween.

9 is a cross-sectional view illustrating an LCD module 100 of an IN-CELL type touch screen, in which the touch sensing unit 130 'is included in an LCD panel. An ITO thin film is deposited inside the liquid crystal layer, i.e., the cell. A glass layer is bonded to the front and back surfaces of the liquid crystal layer, and each glass layer is bonded to the polarizing layer. And the pressure sensing layer 120 is coupled to the lower side of the polarizing layer. The backlight unit 140 is disposed apart from the pressure sensing layer 120. And an LCD module cover 160 of a conductive material houses the layers. A spacing member 170 is coupled between the pressure sensing layer 120 and the backlight unit 140 to maintain a gap between the pressure sensing layer 120 and the backlight unit 140. As the spacing member 170, a double-sided adhesive tape (DAT) or the like may be used. The backlight unit 140 is attached to the bottom surface of the LCD module cover 160. The backlight unit 140 may include several optical components. The pressure sensing layer 120 faces the LCD module cover 160 made of a conductive material with the backlight unit 140 interposed therebetween.

7 to 9, the pressure sensing layer 120 is formed of a sheet of transparent conductive material to detect the intensity of the pressure at the time of a touch event. The pressure sensing layer 120 may be a transparent conducting oxide (TCO) such as ITO, a silver nanowire, a carbon nanotube (CNT), or a graphene. 7 to 9, the pressure sensing layer 120 is not fabricated separately from the LCD module 100, but is fabricated together with the LCD module 100 when the LCD module 100 is manufactured. 10 and 11 are plan views schematically showing a pressure sensing layer 120 according to an embodiment of the present invention. As shown in FIG. 10, the pressure sensing layer 120 includes a plurality of through- (121) can be formed. The plurality of through holes 121 may be formed so as to increase in area from the panel edge toward the center. As shown in FIG. 11, the pressure sensing layer 120 may have a penetration area of 20% or more, preferably 50% or more of the entire penetration area of the pressure sensing layer 120. In addition, the pressure sensing layer 120 may include an incision formed at each edge by being cut inward at each set length and width. The pressure sensing layer 120 may include a through hole 121 'formed at a center of the pressure sensing layer 120 and having a penetration area of a distance of 1/4 of the edge lengths of 20% or more of the entire penetration area . When the through hole 121 is formed in the pressure sensing layer 120 as described above, when the center portion of the screen cover 210 is touched and when the edge portion of the screen cover 210 is touched, Can be corrected.

A three-dimensional touch screen panel including the LCD module 100 described with reference to FIGS. 7 to 9 will be described with reference to FIG.

The screen cover 210 may function as a touch surface of the user. For normal operation of the capacitive touch screen panel, it is preferable that the screen cover 210 is made of a material having a uniform dielectric constant and has a constant thickness. For example, the screen cover 210 may be made of a material such as PET (polyethylene terephthalate) or glass.

The LCD module 100 as described above is attached to the bottom surface of the screen cover 210 by an adhesive member 250. The LCD module 100 includes a touch sensing unit

The support frame 220, together with the screen cover 210, may perform a housing function to enclose circuitry for operation of the LCD panel 100 and the touch screen panel. The support frame 220 may be made of a conductive material or a non-conductive material. The LCD module 100 may be fixed to the bottom surface of the support frame 220 by an adhesive member.

The touch sensing unit 130 and the pressure sensing layer 120 are coupled to the LCD module 100 (on-cell or in-cell type) or on the LCD module 100 as described above with reference to FIGS. Add-on type) can be combined. The touch sensing unit 130 is configured to detect a touch event and a touch position with respect to the screen cover 210.

The LCD module 100 including the touch sensing unit 130 may be attached to the bottom surface of the screen cover 210 by an adhesive member 250. The LCD module 140 is housed by the LCD module cover 160 of a conductive material according to an embodiment of the present invention. The pressure sensing layer 120 disposed within the LCD module 100 is displaced together with the screen cover 210 in the direction of the force applied when the screen cover 210 is touched. Accordingly, the distance between the bottom surface of the LCD module cover 160 and the pressure sensing layer 120 changes. The LCD module cover 160 and the pressure sensing layer 120 are not in contact with each other because the spacers 170 are coupled between the LCD module cover 160 and the pressure sensing layer 120. The spacer member has elasticity so that the screen cover 210 can be returned to its original state after being displaced by a touch. When the distance between the LCD module cover 160 and the pressure sensing layer 120 is displaced, the pressure sensing layer 120 detects a change in the electrostatic capacitance and detects the magnitude of the applied pressure. So that the capacitances are maintained. That is, in a default state in which no force is applied, the pressure sensing layer 120 and the LCD module cover 160 do not contact each other, and a maximum displacement occurs in the pressure sensing layer 120 due to a force applied to the screen cover 210 They are arranged so as not to come into contact with each other. Preferably, the LCD module cover 160 made of a conductive material is set to a ground or set voltage.

The support frame 220 may include a support frame for housing the touch screen panel 100, a middle frame for partitioning the electrical components including the display panel and the battery, a touch screen panel including the display panel, Gt; shielding < / RTI >

The adhesive member 250 adhesively bonds the LCD module 100 to the screen cover 210. OCA (Optical Clear Adhesive), OCR (Optical Clear Resin), a pressure sensitive adhesive material or an ultraviolet curing adhesive material, and a double-sided adhesive tape.

The PCB module 230 connects the touch sensing unit 130 and the pressure sensing layer 120 with the control IC 240 to transmit signals. The PCB module 230 connects the LCD module 100 with a control IC or a driving circuit (not shown) to transmit a signal. It is preferable to use a flexible PCB module.

The control IC 240 is a main component of the touch screen panel. The control IC 240 includes a signal source, a multiplexer, and an A / D converter. The control IC 240 converts an analog signal transmitted from the panel into a digital signal, (Coordinates, etc.) necessary for judging the magnitude of the pressure to be transmitted to the host (smartphone AP, etc.).

The layers of the LCD module 100 including the touch sensing part 130 and the pressure sensing layer 120 which are coupled to the screen cover 210 by the adhesive member 250, It is preferable that the distance between the pressure sensing layer 120 and the LCD module cover 160 changes according to the magnitude of the pressure and the elasticity is restored to the original position when the pressure is removed.

Meanwhile, the microcontroller not included in the figure determines a touch event, a touch position, and a pressure magnitude according to a signal applied from the touch sensing unit 130 and the pressure sensing layer 120. Microcontrollers include, for example, processors, device drivers, and interface circuits, etc., that are integrated into a single integrated circuit chip or structure or that are all operably arranged on a motherboard. The controller executes commands stored in firmware and / or software (not shown).

The operation of the touch screen panel according to the embodiment of the present invention will now be described. When the user touches the screen cover 210, the layers including the pressure sensing layer 120 are displaced toward the LCD module cover 160 according to the applied pressure. When the distance between the LCD module cover 161 of the conductive material and the pressure sensing layer 120 changes, the electrostatic capacitance changes and the microcontroller receiving the electrostatic capacitance sensing signal determines the magnitude of the pressure through the variation of the electrostatic capacitance do. The microcontroller determines a touch event and a touch position according to a signal applied from the touch sensing unit 130. Accordingly, in the touch screen panel according to the embodiment of the present invention, the touch event and the touch position are determined according to a signal applied from the touch sensing unit 130, and the magnitude of the pressure applied at the time of touch generation is determined by the pressure sensing layer 120 Therefore, there is an advantage that a complex electrode pattern or a separate electrode pattern is not required. In addition, the touch screen panel 100 according to the embodiment of the present invention employs the pressure sensing layer 120 having the plurality of through holes 121 to touch the center position of the screen cover 210, It is possible to compensate for the error in the pressure magnitude. In addition, the touch screen panel 100 according to the embodiment of the present invention does not include a separate member but uses the LCD module cover 160 to change the capacitance due to the displacement between the pressure sensing layers 120, Can be used for detection. Therefore, the embodiment of the present invention has an advantage that the configuration can be simplified and the manufacturing process and manufacturing cost can be reduced.

100: LCD module 110: LCD panel
120: pressure sensing layer 130: touch sensing part
140: backlight unit 150, 250: adhesive member
160: LCD module cover 170: Spacer
210: Screen cover 220: Middle frame
230: PCB module 240: control IC
260:

Claims (8)

In a three-dimensional touch screen panel,
Screen cover;
A touch sensing unit positioned below the screen cover and detecting a touch position with respect to the screen cover,
An LCD module positioned below the touch sensing unit; And
And a middle frame housing the screen cover and the LCD module,
The LCD module includes an LCD panel including a first glass layer and a second glass layer positioned between the liquid crystal layer and the liquid crystal layer, a pressure sensing layer of a conductive material located below the second glass layer, And an LCD module cover of a conductive material for housing the LCD module cover,
Wherein the pressure sensing layer is spaced apart from a bottom surface of the LCD module cover and outputs a signal corresponding to a capacitance that varies according to a magnitude of a touch pressure applied to the screen cover,
Wherein the pressure sensing layer is formed with at least one penetrating portion penetrating in the thickness direction, and the penetrating portions are increased in area from an edge of the pressure sensing layer to a center thereof . The method according to claim 1,
Wherein the gap between the LCD module cover and the pressure sensing layer varies with the magnitude of the touch pressure. The method according to claim 1,
And a spacer positioned between the pressure sensing layer and the LCD module cover. delete delete The method according to claim 1,
And a microcontroller connected to the pressure sensing layer for determining a magnitude of the pressure by the touch according to a signal applied from the pressure sensing layer. In a three-dimensional touch screen panel,
Screen cover;
An LCD module positioned below the screen cover; And
And a middle frame housing the screen cover and the LCD module,
Wherein the LCD module includes a first glass layer and a second glass layer positioned between the liquid crystal layer and the liquid crystal layer, a touch sensing unit positioned on the first glass layer and detecting a touch position with respect to the screen cover, 2 glass layer, and an LCD module cover of a conductive material for housing the LCD module,
Wherein the pressure sensing layer is spaced apart from a bottom surface of the LCD module cover and outputs a signal corresponding to a capacitance that varies according to a magnitude of a touch pressure applied to the screen cover,
Wherein the pressure sensing layer is formed with at least one penetrating portion penetrating in the thickness direction, and the penetrating portions are increased in area from an edge of the pressure sensing layer to a center thereof. In a three-dimensional touch screen panel,
Screen cover;
An LCD module positioned below the screen cover; And
And a middle frame housing the screen cover and the LCD module,
The LCD module includes a first glass layer and a second glass layer positioned between the liquid crystal layer and the liquid crystal layer, a pressure sensing layer of a conductive material positioned below the second glass layer, a conductive material for housing the LCD module, LCD module cover,
Wherein the pressure sensing layer is spaced apart from a bottom surface of the LCD module cover and outputs a signal corresponding to a capacitance that varies according to a magnitude of a touch pressure applied to the screen cover,
A touch sensing part for sensing a touch position with respect to the screen cover is positioned in the liquid crystal layer,
Wherein the pressure sensing layer is formed with at least one penetrating portion penetrating in the thickness direction, and the penetrating portions are increased in area from an edge of the pressure sensing layer to a center thereof.
KR1020160000440A 2015-12-14 2016-01-04 3 dimension touch screen panel KR101659476B1 (en)

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KR1020160000440A KR101659476B1 (en) 2016-01-04 2016-01-04 3 dimension touch screen panel
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