JP2016076156A - Touch panel, touch panel controller, control method thereof, and electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch panel with excellent operability, a touch panel controller for controlling the touch panel, a control method thereof, and an electronic device which applies the touch panel.SOLUTION: A touch panel 2 includes: a touch screen 32 for detecting coordinate voltage; a touch panel controller 34 which receives the coordinate voltage detected in the touch screen 32, stores coordinate data in a recognition area on the touch screen 32, and executes coordinate predictive control in a non-recognition area on the touch screen 32, on the basis of the coordinate data in the recognition area on the touch screen 32; and an external memory 58 which is connected to the touch panel controller 34, to supply a coordinate predictive control parameter.SELECTED DRAWING: Figure 6

Description

  The present embodiment relates to a touch panel, a touch panel controller, a control method thereof, and an electronic device.

  2. Description of the Related Art Recent electronic devices such as computers, mobile phone terminals, and PDAs (Personal Digital Assistants) are mainly provided with an input device for operating electronic devices by touching with a finger. As such an input device, a resistive touch panel (touch sensor) and a capacitive touch panel are known. A touch panel that improves the operational feeling of such a resistive film type touch panel is also disclosed.

JP 2013-105413 A JP 2011-227703 A JP 2009-48233 A JP 2014-13441 A

  The present embodiment provides a touch panel with good operability, a touch panel controller for controlling the touch panel, a control method thereof, and an electronic apparatus to which the touch panel is applied.

  According to one aspect of the present embodiment, the touch screen that detects the coordinate voltage, the coordinate voltage detected on the touch screen are received, the coordinate data in the recognition range on the touch screen is stored, and the touch A touch panel controller that executes coordinate prediction control in the non-recognition range on the touch screen based on the coordinate data in the recognition range on the screen, and an external memory that is connected to the touch panel controller and supplies coordinate prediction control parameters. A touch panel is provided.

  According to another aspect of the present embodiment, a panel interface that receives the coordinate voltage detected on the touch screen, and an analog-digital converter that is connected to the panel interface and converts an analog value of the coordinate voltage into a digital value. , Connected to the analog-digital converter, storing coordinate data in a recognition range on the touch screen based on the digital value, and non-recognition on the touch screen based on the coordinate data in the recognition range on the touch screen A coordinate prediction control unit that executes coordinate prediction control in a range; a central processing unit that is connected to the coordinate prediction control unit and executes arithmetic control in the coordinate prediction control unit; and an external memory interface that supplies coordinate prediction control parameters; With t Panel controller is provided.

  According to the other aspect of this Embodiment, an electronic device provided with said touch panel or touch panel controller is provided.

  According to another aspect of the present embodiment, a panel interface that receives the coordinate voltage detected on the touch screen, and an analog-digital converter that is connected to the panel interface and converts an analog value of the coordinate voltage into a digital value. , Connected to the analog-digital converter, storing coordinate data in a recognition range on the touch screen based on the digital value, and non-recognition on the touch screen based on the coordinate data in the recognition range on the touch screen A coordinate prediction control unit that executes coordinate prediction control in a range; a central processing unit that is connected to the coordinate prediction control unit and executes arithmetic control in the coordinate prediction control unit; and an external memory interface that supplies coordinate prediction control parameters; With t A control method for a panel controller, which includes a touch detection step, an X coordinate detection step, a Y coordinate detection step, a step of recording detected coordinate data in a data storage memory, a coordinate prediction control step, and a line coordinate output step. Is provided.

  According to the present embodiment, it is possible to provide a touch panel with good operability, a touch panel controller for controlling the touch panel, a control method thereof, and an electronic device to which the touch panel is applied.

(A) Typical sectional structure figure of electrostatic touch panel concerning comparative example, (b) Typical sectional structure figure of resistance type touch panel concerning comparative example. (A) The typical cross-section figure of the electrostatic touch panel which concerns on the comparative example of the state which the water drop adhered, (b) The typical cross-section figure of the electrostatic touch panel which concerns on the comparative example of the state used through a glove. It is principle explanatory drawing of the coordinate detection of the resistance type touch panel which concerns on embodiment, Comprising: (a) Typical bird's-eye view explaining X coordinate detection, (b) Typical bird's-eye view explaining Y coordinate detection. (A) The typical cross-section figure explaining recognition range DR in the electrostatic touch panel which concerns on a comparative example, (b) The typical cross-section structure figure explaining recognition range DR in the resistance type touch panel which concerns on embodiment. The typical cross-section figure explaining the recognition range DR and the non-recognition range UD in the resistive touch panel which concerns on embodiment. The typical block block diagram of the touchscreen which concerns on embodiment. The typical block block diagram of the touch-panel controller which concerns on embodiment. The typical block block diagram of the coordinate prediction control part of the touchscreen controller which concerns on embodiment. In the touch panel which concerns on embodiment, the operation locus | trajectory of finger | toe which moves on a touch screen, moving time, and explanatory drawing of data sampling. (A) In the touch panel which concerns on embodiment, the schematic cross-section figure explaining the press distance L- (DELTA) L accompanying the press distance L and the press error (DELTA) L by a finger, (b) In the operation locus | trajectory of the finger moving on a touch screen Explanatory drawing of the recognition range DR corresponding to the press distance L, and the non-recognition range UD corresponding to the press distance L-ΔL. FIG. 4 is an explanatory diagram of a relationship between data sampling points and coordinates of an operation locus of a finger moving on a touch screen in the touch panel according to the embodiment. (A) In the touch panel which concerns on embodiment, it is the figure which looked at the touch screen from the side surface, Comprising: The operation locus | trajectory of the finger | toe which moves on a touch screen, and explanatory drawing of recognition range DR and non-recognition range UD, ) An explanatory diagram of data sampling points in the recognition range DR. The flowchart figure of the control method of the touch panel controller which concerns on embodiment. The detailed flowchart figure of the coordinate prediction control method in the control method of the touchscreen controller which concerns on embodiment. Explanatory drawing of the ambiguous part data cut step in the coordinate predictive control method of the touchscreen controller which concerns on embodiment. Explanatory drawing of the difference calculation step based on a reference line, and the majority calculation step in the coordinate prediction control method of the touch panel controller which concerns on embodiment. Explanatory drawing of a required line determination step in the coordinate predictive control method of the touchscreen controller which concerns on embodiment. Explanatory drawing of a line length determination step in the coordinate predictive control method of the touch panel controller which concerns on embodiment.

  Next, embodiments will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

  In addition, the embodiment described below exemplifies an apparatus and method for embodying the technical idea, and does not specify the material, shape, structure, arrangement, etc. of the component parts as follows. . This embodiment can be modified in various ways within the scope of the claims.

(Comparative example)
An electrostatic touch panel is often adopted as a touch panel represented by a smart phone or a tablet device. This is because it is suitable for operation on the screen by finger slide. On the other hand, a touch panel applied to a ticket vending machine or the like places emphasis on “pressing”, and thus a resistive touch panel is often employed.

  A schematic cross-sectional structure of the electrostatic touch panel 1A according to the comparative example is represented as illustrated in FIG. 1A, and a schematic cross-sectional structure of the resistive touch panel 2A according to the comparative example is illustrated in FIG. 1B. It is expressed as follows.

  As shown in FIG. 1A, the electrostatic touch panel 1 </ b> A according to the comparative example includes an upper electrode 12 and a lower electrode 16 that are formed of transparent electrodes and the like, and an insulation disposed between the upper electrode 12 and the lower electrode 16. A capacitance change between the upper electrode 12 and the lower electrode 16 that changes with the slide of the finger 8 in contact with the insulating layer 10, comprising the layer 14 and the insulating layer 10 disposed on the upper electrode 12; The coordinates of the contact position of the finger 8 can be detected.

  On the other hand, as shown in FIG. 1B, the resistive touch panel 2A according to the comparative example includes an X coordinate detection transparent electrode 18 and a Y coordinate detection transparent electrode 22 arranged via a space 20. The coordinates of the contact position of the finger 8 can be detected by detecting the contact between the transparent electrodes 18 and 22 due to the pressing of the finger 8 against the transparent electrode 18.

  A schematic cross-sectional structure of the electrostatic touch panel 1A according to the comparative example in a state where the water droplet 4 is attached is expressed as shown in FIG. 2A, and the electrostatic touch panel according to the comparative example in a state of being used via the glove 6 is shown. A schematic cross-sectional structure of the touch panel 1A is represented as shown in FIG.

  As shown in FIG. 1A, the electrostatic touch panel 1A according to the comparative example can slide the finger 8 in contact with the insulating layer 10 and has good operability. On the other hand, as shown in FIG. 2A, when a water droplet 4 such as rain is interposed, the capacitance value changes, and accurate recognition becomes difficult. In addition, the capacitance value cannot be recognized when used through the glove 6 as shown in FIG.

  As shown in FIG. 1B, the resistance touch panel 2A according to the comparative example cannot be recognized unless the finger 8 is pressed, and is not suitable for continuous operation. It can be easily operated and is less expensive than an electrostatic touch panel in terms of cost.

[Embodiment]
(Principle explanation)
It is a principle explanatory view of coordinate detection of touch panel 2 concerning an embodiment, Comprising: The typical bird's-eye view composition explaining X coordinate detection in a 4-wire type analog resistance type touch panel is expressed as shown in Drawing 3 (a). A schematic bird's-eye view configuration for explaining the Y-coordinate detection is expressed as shown in FIG.

The touch panel 2 according to the embodiment includes a transparent electrode 18 for X coordinate detection and a transparent electrode 22 for Y coordinate detection arranged with a space interposed therebetween, and is transparent by pressing the finger 8 against the transparent electrode 18. By detecting the contact between the electrodes 18 and 22, the coordinates of the contact position of the finger 8 can be detected. As shown in FIGS. 3A and 3B, the transparent electrodes 18 and 22 have voltage gradients in the X-axis and Y-axis directions, respectively, and determine the coordinate position by detecting the voltage at the touched position. doing. The detection of the X coordinate / Y coordinate is performed by switching an analog switch (built in the panel interface 38 of FIG. 7). The coordinate resolution depends on the applied voltage V _CC to the touch panel 2 and the resolution of an analog digital converter (ADC) 24.

  Note that the touch panel 2 according to the embodiment is not limited to the above-described four-wire type, and is similarly applicable to a five-wire type, a seven-wire type, an eight-wire type, and the like.

  Further, a glass layer may be disposed on the transparent electrode 18 and below the transparent electrode 22 in order to protect the transparent electrodes 18 and 22 and to provide durability.

(Recognized range and non-identified range)
A schematic cross-sectional structure for explaining the recognition range DR in the electrostatic touch panel 1A according to the comparative example is represented as shown in FIG. 4A, and is a schematic diagram for explaining the recognition range DR in the touch panel 2 according to the embodiment. The cross-sectional structure is expressed as shown in FIG.

  In the electrostatic touch panel 1A according to the comparative example, the recognition range DR can be determined only by sliding the finger 8 in contact. On the other hand, in the touch panel 2 according to the embodiment, the recognition range DR can be determined by moving while maintaining the state in which the transparent electrodes 18 and 22 are in contact with each other by pressing the finger 8.

  A schematic cross-sectional structure for explaining the recognition range DR and the non-recognition range UD in the touch panel 2 according to the embodiment is expressed as shown in FIG.

  The recognition range DR in the touch panel 2 according to the embodiment is a range that moves while consciously maintaining the state in which the transparent electrodes 18 and 22 are in contact with each other by pressing the finger 8. On the other hand, as indicated by a broken line A, a range in which the force is unconsciously removed and the contact between the transparent electrodes 18 and 22 is separated becomes a non-recognition range UD.

  In the touch panel 2 according to the embodiment, if the user does not consider the operation of “pressing” the finger 8 during continuous operation, the pressing force is unconsciously released, and the contact state between the transparent electrodes 18 and 22 is released. Therefore, as shown in FIG. 5, the range (DR + UD) to be recognized is divided into a pressed section (corresponding to the recognition range DR) and a section (corresponding to the non-recognition range UD) that should be touched. In order to recognize the entire range (DR + UD), the entire range (DR + UD) is created by predicting the section (non-recognition range UD) that should be touched from the pressed section (recognition range DR) and creating prediction data. A result equivalent to the recognition data can be obtained.

(Touch panel block configuration)
A schematic block configuration of the touch panel 2 according to the embodiment is expressed as shown in FIG.

  As shown in FIG. 6, the touch panel 2 according to the embodiment includes a touch screen 32 that detects the X coordinate voltage XP · XN and the Y coordinate voltage YP · YN, and the X coordinate voltage XP · XN detected on the touch screen 32. The Y coordinate voltage YP · YN is received, the (X, Y) coordinate data in the recognition range DR on the touch screen 32 is stored, and based on the (X, Y) coordinate data in the recognition range DR on the touch screen 32, A touch panel controller 34 that executes coordinate prediction control in the non-recognition range UD on the touch screen 32 and an external memory 58 that is connected to the touch panel controller 34 and supplies coordinate prediction control parameters.

  Here, as the external memory 58, for example, a nonvolatile memory such as an EEPROM (Electrically Erasable Program Memory) capable of setting and changing the memory contents may be applied.

(Block configuration of touch panel controller)
A schematic block configuration of the touch panel controller 34 according to the embodiment is expressed as shown in FIG.

  As shown in FIG. 7, the touch panel controller 34 according to the embodiment includes a panel interface (I / F) 38 that receives the X coordinate voltage XP · XN and the Y coordinate voltage YP · YN detected on the touch screen 32; An ADC 24 connected to the panel I / F 38 for converting the analog values of the X coordinate voltage XP · XN and the Y coordinate voltage YP · YN into digital values, and connected to the ADC 24 and recognized on the touch screen 32 based on the digital values. The coordinate prediction control unit 56 stores coordinate data in the range DR and executes coordinate prediction control in the non-recognition range UD on the touch screen 32 based on the (X, Y) coordinate data in the recognition range DR on the touch screen 32. And calculation control in the coordinate prediction control unit 56. Comprises a central processing unit (CPU) 46 that executes, and an external memory interface (I / F) 50 supplies a coordinate predictive control parameters.

  Here, the coordinate prediction control parameters are supplied from the external memory 58.

  Here, as the external memory 58, for example, a nonvolatile memory such as an EEPROM may be applied.

  The external memory interface (I / F) 50 can supply coordinate prediction control parameters to the CPU 46 via the program memory 52.

  Further, as shown in FIG. 7, the touch panel controller 34 according to the embodiment may include a host interface 54 and may be connected to the host device 36 via the host interface 54.

  Information on the host device 36 is supplied to the CPU 46 via a register 48 connected to the host interface 54.

  The coordinate prediction control parameters include various parameters for executing coordinate prediction control, as will be described later. That is, a data cut amount setting parameter, a reference line setting parameter applied to difference calculation, a line length setting parameter, and the like are included.

(Block configuration of the coordinate prediction control unit)
A schematic block configuration of the coordinate prediction control unit 56 of the touch panel controller 34 according to the embodiment is expressed as shown in FIG.

  As shown in FIG. 8, the coordinate prediction control unit 56 of the touch panel controller 34 according to the embodiment is connected to the ADC 24 and stores (X, Y) coordinate data in the recognition range DR on the touch screen 32. 40 and the data storage memory 40 for coordinate prediction control in the non-recognition range UD on the touch screen 32 based on (X, Y) coordinate data and coordinate prediction control parameters in the recognition range DR on the touch screen 32. And a computing memory 44 connected to the computing unit 42.

  As shown in FIGS. 7 and 8, the coordinate prediction control parameter supplied from the external memory 58 via the external memory interface 50 is supplied to the adder 25 and the arithmetic unit 42 via the data line EFD1, and the data line EFD2 Is supplied to the adder 43.

  Since the AD data converted by the ADC 24 is also supplied to the adder 25, the AD converted digital data and the coordinate prediction control parameter are added by the adder 25 and stored in the data storage memory 40.

  On the other hand, the calculation control signal supplied from the CPU 46 is added to the coordinate prediction control parameter in the adder 43 and supplied to the calculator 42.

  As shown in FIGS. 7 and 8, the computing unit 42 can set the memory amount of the data storage memory 40 by supplying a memory amount setting signal MS to the data storage memory 40.

  7 and 8, the data line FO corresponds to the data flow when the prediction is zero without performing the coordinate prediction control.

  In the above configuration, the data storage memory 40 and the calculation memory 44 can be shared.

(Data sampling)
In the touch panel 2 according to the embodiment, the operation locus 60 of the finger 8 moving on the touch screen 32, the moving time t _m, and the data sampling are expressed as shown in FIG. 9, the P0 · P1 · P2 · ... · P10, represent data sampling points on the touch screen 32, Delta] t _s represents a single sampling time. Delta] t _s represents the sampling resolution, for example, about 5 msec. In the example shown in FIG. 9, an example is shown in which sampling is performed seven times for the movement time t _m of the finger 8 moving on the touch screen 32 from the data sampling point P1 to the data sampling point P8.

(Pressing distance L and recognition range DR)
In the touch panel 2 according to the embodiment, a schematic cross-sectional structure for explaining the pressing distance L by the finger 8 and the pressing distance L−ΔL accompanying the pressing error ΔL is expressed as shown in FIG. In the touch panel 2 according to the embodiment, in the operation locus 60 / 60A of the finger 8 moving on the touch screen 32, the recognition range DR corresponding to the pressing distance L and the non-recognizing range UD corresponding to the pressing distance L−ΔL. Is expressed as shown in FIG.

  10A, by pressing the transparent electrode 18 with the finger 8, the distance of the space 20 between the transparent electrodes 18 and 22 is reduced, and the transparent electrodes 18 and 22 are in contact with each other at the pressing distance L. ing. On the other hand, the transparent electrodes 18 and 22 are in a non-contact state at the pressing distance L−ΔL accompanying the pressing error ΔL due to insufficient pressing by the finger 8.

  As shown in FIG. 10B, since the transparent electrodes 18 and 22 are in contact with each other at the pressing distance L, a recognition range DR is obtained between the data sampling points P0 and Pi, and between the data sampling points P0 and Pi. The operation trajectory of the finger 8 is represented by 60 solid lines. On the other hand, at the pressing distance L−ΔL, since the transparent electrodes 18 and 22 are in a non-contact state, the non-recognized range UD is set between the data sampling points Pi and Pj, and the operation locus of the finger 8 between the data sampling points Pi and Pj. Is represented by a broken line of 60A.

(Relationship between data sampling points and coordinates)
In the touch panel 2 according to the embodiment, the relationship between the data sampling point of the operation locus 60 of the finger 8 moving on the touch screen 32 and the (X, Y) coordinates is expressed as shown in FIG. In the example shown in FIG. 11, for the data sampling points P0, P1, P2,... P10, the corresponding (X, Y) coordinates are (X0, Y0), (X1, Y1),. Y10). In the example shown in FIG. 11, the data sampling points P0, P1, P2,..., P10 are included in the recognition range DR. Further, data sampling of the sampling time is Delta] t _s.

  In the touch panel 2 according to the embodiment, the touch screen 32 is viewed from the side, and an operation locus of a finger moving on the touch screen, and an explanatory diagram of the recognition range DR and the non-recognition range UD are illustrated in FIG. The description of the data sampling points P0, P1, P2,..., P10 in the recognition range DR is expressed as shown in FIG.

  When the thickness of the touch screen 32 is LP, the operation locus 60 of the finger 8 moving on the touch screen 32 is sufficiently pressed by the finger 8 between the data sampling points P0 and P10, and the recognition range DR is satisfied. Indicates that there is. On the other hand, even if there is an operation locus 60A of the finger 8 moving on the touch screen 32 between the data sampling points P10 and PS, the pressure is insufficient, and corresponding (X, Y) coordinate information cannot be obtained. It shows that it is non-recognition range UD. Here, the value of the thickness LP of the touch screen 32 is, for example, about 1 mm.

In FIG. 12B, the horizontal axis is the time (t) axis, and the data sampling points P0, P1, P2,..., P10 in the recognition range DR are plotted on the time axis as black circles. Within the recognition range DR, 11 (X, Y) coordinates (X0, Y0), (X1, Y1),... (X10, Y10) corresponding to the data sampling points P0, P1, P2,. Can be recognized (see FIG. 11). Here, the sampling time Delta] t _s For example, the 5 msec, the sampling time of 11 points, a 11 × 5 = 55 msec. The moving distance of the finger 8 on the touch screen 32 is determined by the moving time.

If the moving distance corresponding to the recognition range DR is about 5 cm and the moving time is about 1 sec, the actual number of samplings during this period is 200 times if the sampling time Δt _s = 5 msec.

(Control method of touch panel controller)
The flowchart of the control method of the touch panel controller 34 according to the embodiment is expressed as shown in FIG. Further, in the control method of the touch panel controller 34 according to the embodiment, a flowchart of the coordinate prediction control method is expressed as shown in FIG.

  As shown in FIG. 13, the touch panel controller 34 according to the embodiment has a touch detection step S1, an X coordinate detection step S2, a Y coordinate detection step S3, and the detected coordinates recorded in the data storage memory 40. Step S4, coordinate prediction control step S5, and line coordinate output step S6. Either the X coordinate detection step S2 or the Y coordinate detection step S3 may be executed first.

In the touch detection step S1, the transparent electrode 18 is pressed with a finger or the like, the resistance sheets of the transparent electrodes 18 and 22 are connected, and a current flows through the detection circuit, whereby the touch is detected. A series of operation time of touch sensing step S1 · X coordinate detection step S2 · Y coordinate detection step S3 is about sampling time Delta] t _s, for example, about 5 msec.

  In the control method of the touch panel controller 34 according to the embodiment, in addition to the coordinate recognition of the resistive touch panel in the touch detection step S1, the X coordinate detection step S2, and the Y coordinate detection step S3, continuous coordinate recognition (finger etc. The coordinate prediction algorithm at the time of the necessity of movement) is incorporated in an IC (integrated circuit) constituting the coordinate prediction control unit 56 in the touch panel controller 34.

  In step S 4 for recording the detected coordinates in the data storage memory 40, the output for each (X, Y) coordinate data point is recorded in the data storage memory 40.

  In the coordinate prediction control step S5, the output for each (X, Y) coordinate data point is arranged as a coordinate point and output as output line (line) P information.

(Coordinate prediction control method)
Further, in the control method of the touch panel controller 34 according to the embodiment, as shown in FIG. 14, the coordinate prediction control method includes a step S51 for detecting from the start point to the end point, a step S52 for cutting the data of the ambiguous part, It has a difference calculation step S53, a majority decision calculation step S54, a necessary line determination step S55, and a line length determination step S56.

(Fuzzy part data cut step)
In the coordinate predictive control method of the touch panel controller according to the embodiment, an explanatory diagram of the ambiguous part data cut step is expressed as shown in FIG.

  On the output line P of the (X, Y) coordinate data points obtained in step S51 for detecting from the start point to the end point, the vicinity of the start point P0 and the vicinity of the end point P10 are cut by the ambiguous portion data cut width DC. Here, the cut amount of the ambiguous portion data is stored in the external memory 58 in advance. Note that it is desirable that the cut amount of the ambiguous portion data is variable.

(Difference calculation step and majority calculation step)
In the coordinate prediction control method of the touch panel controller 34 according to the embodiment, an explanatory diagram of the difference calculation step and the majority decision operation step based on the reference line 70 is expressed as shown in FIG.

  The reference line 70 is superimposed on the output line P of the (X, Y) coordinate data point obtained in step S51 for detecting from the start point to the end point, and the difference from the next data is calculated. Here, it is assumed that one subdivided interval of the reference line 70 is the difference Δ2. At this time, the data sampling points P2, P3, P4, P5, P6, P7, and P8 in the range cut by the ambiguous portion data cut width DC among the data sampling points P0, P1, P2,. The difference between the data sampling points P1, P2, P3, P4, P5, P6, and P7 is calculated. As shown on the horizontal axis corresponding to the data sampling points P2, P3, P4, P5, P6, P7, and P8, the calculation results are Δ2, Δ2, Δ1, Δ1, Δ1, Δ2, and Δ2.

  Here, in the majority calculation step S54, the data sampling points P2, P3, P7, and P8 of the difference Δ2 are deleted, and the calculation that leaves only the data sampling points P4, P5, and P6 of the difference Δ1 is executed.

  Here, information of the reference line 70 is stored in the external memory 58 in advance. The setting of the reference line 70 is preferably variable. The information on the reference line 70 is determined by, for example, application software that operates the touch panel according to the embodiment.

(Required line determination step and line length determination step)
In the coordinate prediction control method of the touch panel controller according to the embodiment, the explanatory diagram of the necessary line determining step S55 is expressed as shown in FIG. 17, and the explanatory diagram of the line length determining step S56 is expressed as shown in FIG. The

  As shown in FIG. 17, the necessary line 90 can be obtained as a straight line connecting the data sampling points P4, P5, and P6 of the difference Δ1 obtained through the difference calculation step S53 and the majority decision step S54.

  A drawing in which the necessary line 90 obtained as described above is drawn over the recognition range DR and the non-recognition range UD corresponds to FIG. The output line P of the (X, Y) coordinate point is linearly approximated from the start point P0 to the end point P10 by the necessary line 90 in the recognition range DR, and the necessary line 90 is extended to the non-recognition range UD. Information of an arbitrary length up to the final point PE can be obtained as the predicted line IDL in the recognition range UD.

  The setting of the line length is stored in advance in the external memory 58 because it is determined by a section in which information over the recognition range DR and the non-recognition range UD is desired.

In the above example, for the sake of simplicity, the example of 11 data sampling points has been described. However, in practice, when the moving distance corresponding to the recognition range DR is about 5 cm and the moving time is about 1 sec, sampling is performed. If the time Δt _s = 5 msec, the actual number of samplings during this period is 200 times.

  According to the control method of the touch panel controller according to the embodiment, from the relatively short data in the recognition range DR, data approximated by a straight line in the necessary line 90 is calculated, and as the predicted line IDL in the non-recognition range UD, Information of an arbitrary line length can be obtained.

  In the touch panel according to the embodiment, in order to recognize the entire range (DR + UD) to be recognized, a section (non-recognition range UD) that should be touched from the pressed section (recognition range DR) is predicted, and the prediction data By creating, a result equivalent to the recognition data in the entire range (DR + UD) can be obtained.

  In the touch panel according to the embodiment, touch panel operations such as an electronic book, a television, and a game by moving a finger in a bathroom can be performed.

  In addition, in the touch panel according to the embodiment, it is possible to respond to an operation with a gloved state or an application on a game machine adopting a resistance touch panel. The touch panel can be adopted.

(Electronics)
The touch panel or the touch panel controller according to the embodiment can be applied to various electronic devices.

  The touch panel according to the embodiment has a simple structure, is resistant to water (rain), is inexpensive, and can use a resistive film type touch panel like an electrostatic touch panel with good operability. Applicable to equipment. For example, the touch panel or the touch panel controller according to the embodiment includes highly publicly available items handled by unspecified majority such as ATMs and vending machines (especially vending machines such as railway stations and restaurants) of financial institutions such as banks, The present invention can be applied to mobile phones, smart phones, tablet PCs, cameras, personal digital assistants (PDAs), digital audio players, portable game machines, copiers, fax machines, car navigation systems, and the like. In addition, multimedia station, arcade game, information board, Hello Work job search system, restaurant restaurant ordering system, automatic payment machine, automatic voting machine, library lending system, cash register system, score calculation system, railway vehicle monitoring device, It can also be applied to electronic musical instruments.

  According to the present embodiment, it is possible to provide a touch panel with good operability, a touch panel controller for controlling the touch panel, and an electronic device to which the touch panel is applied.

[Other embodiments]
While the embodiments have been described as described above, the discussion and drawings that form part of this disclosure are illustrative and should not be construed as limiting. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  As described above, various embodiments that are not described herein are included.

  The touch panel according to the present embodiment includes an ATM / vending machine of a financial institution such as a bank (especially a vending machine such as a railway station or a restaurant), a mobile phone, a smart phone, a tablet PC, a camera, a personal digital assistant (PDA), The present invention can be applied to touch panel mounted electronic devices such as digital audio players and portable game machines.

1A, 2, 2A ... Touch panel 4 ... Water drops (rain)
6 ... Gloves 8 ... Finger 10, 14 ... Insulating layer 12 ... Upper electrode (transparent electrode)
16 ... Lower electrodes 18, 22 ... Transparent electrodes 20 ... Space 24 ... Analog-to-digital converter (ADC)
32 ... Touch screen 34 ... Touch panel controller 36 ... Host device 38 ... Panel interface 40 ... Data storage memory 42 ... Calculator 44 ... Calculation memory 46 ... CPU
48 ... Register 50 ... EEPROM interface 52 ... Program memory 54 ... Host interface 56 ... Coordinate prediction control unit 58 ... EEPROM
60, 60A ... operation locus 70 ... reference line 90 ... coordinate prediction line (IDL)
P ... Output line DR ... Recognition range UD ... Non-identification range DC ... Ambiguous part data cut width LP ... Touch screen thickness MS ... Memory amount setting signal XP, XN ... X coordinate voltage YP, YN ... Y coordinate voltage L ... Press Distance ΔL ... Pressure error

Claims (13)

A touch screen for detecting coordinate voltages;
The coordinate voltage detected on the touch screen is received, the coordinate data in the recognition range on the touch screen is stored, and the non-recognition range on the touch screen is based on the coordinate data in the recognition range on the touch screen. A touch panel controller for executing coordinate prediction control in
A touch panel comprising: an external memory connected to the touch panel controller and supplying coordinate prediction control parameters.   The touch panel as set forth in claim 1, wherein the external memory includes an EEPROM. A panel interface for receiving coordinate voltages detected on the touch screen;
An analog-digital converter connected to the panel interface for converting an analog value of the coordinate voltage into a digital value;
Connected to the analog-digital converter, stores coordinate data in the recognition range on the touch screen based on the digital value, and non-recognition range on the touch screen based on the coordinate data in the recognition range on the touch screen. A coordinate prediction control unit for executing coordinate prediction control in
A central processing unit that is connected to the coordinate prediction control unit and executes arithmetic control in the coordinate prediction control unit;
A touch panel controller, comprising: an external memory interface that supplies coordinate prediction control parameters.   The touch panel controller according to claim 3, wherein the coordinate prediction control parameter is supplied from an external memory.   The touch panel controller according to claim 4, wherein the external memory includes an EEPROM. With host interface,
The touch panel controller according to claim 3, wherein the touch panel controller is connected to a host device via the host interface. The coordinate prediction control unit
A data storage memory connected to the analog-digital converter and storing coordinate data in a recognition range on the touch screen;
An arithmetic unit connected to the data storage memory and executing a calculation for the coordinate prediction control in the non-recognition range on the touch screen based on the coordinate data and the coordinate prediction control parameter in the recognition range on the touch screen; ,
The touch panel controller according to claim 3, further comprising: an arithmetic memory connected to the arithmetic unit.   The touch panel controller according to claim 7, wherein the arithmetic unit is capable of setting a memory amount of the data storage memory.   An electronic device comprising the touch panel according to claim 1.   An electronic apparatus comprising the touch panel controller according to claim 3.   The electronic devices include ATM machines, vending machines, ticket vending machines, mobile phones, smart phones, tablet PCs, cameras, personal digital assistants, digital audio players, portable game machines, copy machines, fax machines, car navigation systems, multimedia stations, It is one of an arcade game, a guide board, a job search system, an order system, an automatic payment machine, an automatic voting machine, a library lending system, a cash register system, a score calculation system, a railway vehicle monitoring device, or an electronic musical instrument. The electronic device according to claim 9 or 10. A panel interface that receives coordinate voltages detected on a touch screen, an analog-to-digital converter that is connected to the panel interface and converts an analog value of the coordinate voltage to a digital value, and is connected to the analog-to-digital converter, and the digital value A coordinate prediction control unit that stores coordinate data in the recognition range on the touch screen based on the coordinate data and performs coordinate prediction control in the non-recognition range on the touch screen based on the coordinate data in the recognition range on the touch screen And a central processing unit that is connected to the coordinate prediction control unit and executes arithmetic control in the coordinate prediction control unit, and an external memory interface that supplies coordinate prediction control parameters. There is,
Touch detection step;
An X coordinate detection step;
A Y coordinate detection step;
Recording the detected coordinate data in a data storage memory;
A coordinate prediction control step;
A method for controlling a touch panel controller, comprising: a line coordinate output step. The coordinate prediction control step includes:
Detecting from the start point to the end point;
Cutting the ambiguous part data;
Difference calculation step;
A majority operation step;
The necessary line determination step,
13. The touch panel controller control method according to claim 12, further comprising: a line length determination step.

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