TWI304943B - - Google Patents

Description

1304943 (1) Description of the Invention [Technical Field of the Invention] The present invention relates to a control unit for a touch panel. More specifically, in the touch panel using the resistive film method, it is possible to correspond to a control unit for a touch panel of different driving methods. [Prior Art] Φ As a human interface for a computer system including a POS system, a touch panel is used. The touch panel is driven by a resistive film method. This method is a 4-wire resistive film method and a 5-wire resistive film method. Select the driving method that reflects its characteristics in response to the purpose of use of the touch panel and the form of use. In the past, a dedicated control unit has been prepared in accordance with the selected touch panel driving method. For the technology related to this item, please refer to Patent Document 1 and the like. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei 9- 1 67 047. SUMMARY OF THE INVENTION [Problems to be Solved by the Invention] As in the related art, when a dedicated control unit is prepared corresponding to a touch panel, the touch panel can be surely functioned. . However, as the types of touch panels increase, the types of control units increase, and it takes a lot of money to design and manufacture various control units. Therefore, the inventors have directed to driving control with a single control unit

-4 - (2) 1304943 Touch panel with different driving methods, repeating the focus on review. [Means for Solving the Problem] As a result, the inventors of the present invention have thought of a control unit for a touch panel having the following structure. That is, a touch panel control unit is a control unit for controlling the first touch panel to be driven by the first driving method and the second touch panel by the second driving method, and is characterized in that: a first control circuit unit of the first driving method; a second control circuit unit corresponding to the second driving method; a connector for connecting the first control touch panel and the second touch control panel; and a touch specifically connected to the connector The driving mode specific circuit of the driving method of the panel; and the first selection unit of the control circuit unit are selected according to the driving method specified by the driving mode specific circuit. • According to the touch panel control unit configured as described above, the driving method of the touch panel connected to the connector is specified by the driving method specific unit, and the driving corresponding to the touch panel connected to the connector is selected based on the specific result. The control circuit part of the mode. The control circuit portion thus selected is used to drive and control the touch panel connected to the connector, and this function is properly exerted. The invention of the second aspect of the present invention is as follows. In other words, the first control circuit unit and the second control circuit unit share a switch unit, and the switch unit detects voltages in the X direction and the Y direction of the touch panel by four switching units of -5 (3) 1304943. Three of them have a pair of transistors, and the other one is formed by one transistor. In the case where the first driving method is a 4-wire driving type, each of the three switches is configured. One of the pair of transistors is in a stopped state. According to the invention of the second aspect configured as described above, the switch unit is shared and the specific switch is formed of a single crystal. Therefore, the number of components of the control unit can be reduced, and the number of components can be reduced. . According to the third aspect of the present invention, the first parameter storage unit that stores the first parameter for executing the first driving method is provided, and the second parameter that stores the second driving method is stored. a parameter storage unit; a first program module storage unit that stores a first control program module for executing the first drive mode; and a second program that stores a second control program module for executing the second drive system a module storage unit; • a second selection unit that selects a parameter based on a driving method specified by the driving method specific unit; and a control program module that is selected according to a driving method specified by the driving method specific unit Third choice. The touch panel is driven differently. Even if the control unit is shared, the parameters necessary for the driver and the control program module will be different. Therefore, in the present invention, the optimum parameters and control program modules for each drive mode are prepared in advance, and the optimum parameters and control modes are selected in accordance with the specific drive mode. -6 - (4) 1304943 Therefore, the touch panel can be appropriately controlled. [Embodiment] Hereinafter, constituent elements of the present invention will be described. (Touch Panel) In the present invention, the touch panel of the target resistive film driving method is slightly different. It is proposed that the 4-wire resistive film method (hereinafter sometimes referred to as "4-wire type") and the 5-wire type The resistive film method (hereinafter sometimes referred to as "5-wire type"). The characteristics of the 4-wire resistive film method are the accuracy of the positional accuracy. On the other hand, the characteristics of the 5-wire resistive film method are high in durability. Therefore, the user can arbitrarily choose the driver who takes this feature into consideration. It is known that the 8-wire resistive film method uses the same principle of operation as the 4-wire. In this specification, the 8-wire resistive film method is treated in the same way as the 4-wire type.

(Control Circuit Unit) The control circuit unit controls the operation of the touch panel. In the touch panel, the two types of resistive films of the four-wire type and the five-wire type are arranged at intervals, and when the user touches the upper resistive film, two resistive films are in contact at the touched position. The position touched by the voltage change at that time can be specified. The specificity of the coordinates of the resistive film in the X direction and the Y direction is required at a specific position. (5) (5) 1304943 In the case of the 4-wire type, in order to cause a voltage change, two switches (four in total) are arranged in each direction, and further, in order to detect the contact and non-contact of the two resistive films, There is a switch. On the other hand, in the case of the 5-wire type, in order to cause a voltage change, three of the four electrodes located at the corners of the lower resistive film are provided with two switches (a total of six), and the remaining One electrode is equipped with one switch. Further, in the same manner as the 4-wire type, in order to detect contact or non-contact between the two resistive films, one switch is disposed in the upper resistive film. In one aspect of the present invention, the provision of a control unit that is inexpensive is desired by seeking to share the switching portions in the circuit portion. Of course, in the control unit, the control circuit unit for the 4-wire type and the control circuit unit for the 5-wire type are independently provided, and only one of them is operated according to the specific result of the drive mode specific unit to be described later, and is also included in the present invention. The range 'inside. (Connector) The connector has a plurality of pins and is coupled to the touch panel. The specific pin of the connector is connected to the switch unit, and a signal is input in synchronization with the opening and closing of the switch unit to control the application of the voltage to the touch panel. In addition, the output of the touch panel is also input to the control unit by a specific pin of the connector, where it is parsed. The connector used in the present invention can be connected to any of the first touch panel of the first driving method and the second touch panel of the second driving method.

-8 - (6) (6)1304943 (Drive mode specific unit) The drive mode specific unit inputs a signal to the first pin of the connector to which a touch panel is connected, and detects the output from the second pin to specify The driving method of the touch panel connected to the connector. The signal input to the first pin of the connector can be performed by turning on and off a specific switch of the driver circuit portion as in the embodiment. In this embodiment, the voltage of the electrode of the resistive film is high and low in the embodiment. The output signal from the second pin of the connector is detected, and by analyzing it, the driving method of the touch panel connected to the connector can be specified. For example, when a specific switch is turned on and a voltage is applied from the first pin, the signal detected at the second pin becomes high in the 4-wire touch panel, and becomes low in the 5-wire touch panel. In the case of the driving method of the touch panel connected to the connector, a specific switch can be turned on, and the output of the second pin can be detected and specified. In addition to the foregoing, the driving method of the touch panel can also be specified. For example, when the resistance 値 of a certain portion is different between the first touch panel and the second touch panel having different driving methods, the first touch panel and the second touch panel can be discriminated by measuring the resistance 该 of the portion. In this case, the voltage applied to the portion will become the input signal to the first pin of the connector, and the falling voltage 値 will be the output signal appearing at the second pin. The present invention will be described in detail below based on the examples. Fig. 1 is a structural block diagram showing a control unit of an embodiment of the present invention. Fig. 0 (7) 1304943 As shown in Fig. 1, the control unit 1 of the embodiment is provided with a control circuit unit 10 and a connector. 2 0, microcontroller 50. The connector 20 is selectively connected to the touch panel 25 of the 4-wire resistive film type and the touch panel 25 of the 5-wire resistive film type. (Operation Principle of 4-Wire Touch Panel 24) First, the operation principle of the 4-wire touch panel 24 will be described based on Fig. 2 〇 In Fig. 2, the functions of the terminals and their functions are as shown in Table 1. [Table]] Terminal name function description S W1 # Y electrode voltage supply switch control terminal (for Vcc) SW2 Y electrode voltage supply switch control terminal (for GND) SW3# X electrode voltage supply switch control terminal (for Vcc) SW4 X electrode voltage supply switch control terminal (for GND) SW0# Panel push switch control terminal INT1# Panel push distribution terminal ΑΝ0 Voltage detection terminal AN1 Voltage detection terminal AN2 Voltage detection terminal AN3 Voltage detection terminal In the touch panel 24, 5 first 5 performs panel depression detection. For the "panel press-in" of Table 2, the switch unit connected to each of the terminals SW 1 to SW 0 of the control signal line -10- (8) 1304943 is controlled, and when the output of I nt 1 # is L 〇, It is considered that there is a coordinate detection of the input point (indicated by the arrow in the figure) on the touch panel. The coordinate detection of the input point is performed as follows. In the X-direction coordinate of the detection input point, as in the "X-direction data acquisition" of Table 2, the switching unit connected to the terminals SW1 to SW0 of the control signal line is controlled, and the output of the detection terminal ΑΝ0 or ΑΝ1 is analyzed.

Item off action INTI# (Click) ANO or AN1 AN2 or AN3 SW1 SW2 SW3 SW4 SWO Panel presses OFF OFF OFF ON ON Lo X direction data is taken OFF OFF ON ON OFF — Voltage proportional to XI path (Xl /X) xVcc A Y direction data is taken ON ON OFF OFF OFF — A voltage proportional to Y1 (Yl/Y) xVcc Note: X and Υ indicate the distance between the X and Υ directions of the touch panel. The touch panel is in the input point, and because of the contact with the lower touch panel, the voltage (XWX) xVcc which is proportional to the distance XI is output to ΑΝ0 (or ΑΝ1). Here, X is attached to the distance between the electrodes in the X direction of the upper resistive film.

Similarly, in the Y-direction coordinate of the detection input point, as in the "Y-direction data acquisition" of Table 2, the switching unit connected to the terminals SW1 to SW0 of the control signal line is controlled, and the output of the detection terminal AN2 or AN3 is analyzed. -11 - (9) 1304943. The upper touch panel outputs a voltage (Yl/Y) xVcc proportional to the distance Y 1 to AN2 (or AN3) due to contact with the lower touch panel at the input point. Here, Y is attached to the distance between the electrodes at both ends in the Y direction in the upper resistive film. (Operation Principle of 5-Wire Touch Panel) Next, the operation principle of the touch panel 25 of the 5-wire resistive film method will be described based on Fig. 3 . In Figure 3, the terminals and their functions are shown in Table 3. [Table 3] Terminal name function description S W0# Upper film PU controller terminal SW1# Panel drive open m OFF control output terminal (for P1) SW2 Panel drive switch control output terminal (for P3) S W3# Panel drive switch control output Terminal (for P2) S W4 Panel drive switch control output terminal (for P42) AN 1 4 Panel voltage detection terminal INTI# Panel input distribution input -Lt 11 m Sub touch panel 25, first, press the panel Under test. For this reason, as shown in the "panel press-in" of Table 4, the switch unit connected to each of the terminals SW to SW0 of the control signal line is controlled, and the outputs of AN14 and INTO# are analyzed, and the depression of the touch panel is judged. When pressed, the coordinates of the input point (not shown by the arrow in the figure) are detected. -12- (10) 1304943 The coordinate detection of the input point is performed as follows. In the X-direction coordinate of the detection input point, as shown in Table 4, "X-direction data is taken in J, the switching unit connected to the terminals SW 1 to SW0 of the control signal line is controlled, and the output of the terminal AN14 is analyzed. [Table 4] Switching 1 乍 AN] 4 input INTO # input SW0 SW1 (PI) SW2 (P2) SW3 (P3) SW4 (P4) Panel pressed to enter Lo Hi Hi Hi Hi OV Lo X direction data to enter Hi Lo Hi Hi LO Voltage to X-channel (Xl/X) xVcc Y-direction data is taken into Hi Hi Hi Lo Lo and Y] proportional voltage (Y 〗 / y) xVcc Note: X and Y indicate the X direction of the touch panel and The touch panel on the upper side of the distance between the electrodes in the Y direction is at the input point, and is in contact with the lower touch panel, so that the AN 1 4 outputs a voltage (X 1 /X ) x Vcc proportional to the distance X 1 . X is mounted on the film-side resistive film at the distance between the electrodes in the X direction. Similarly, in the Y-direction coordinate of the detection input point, as in the "Y-direction data acquisition" of Table 4, the control switch is detected. The terminal AN 1 4 outputs a voltage (Yl/Y) xVcc proportional to the distance Y1. Here, Y is attached to the distance between the electrodes in the γ direction in the film side resistive film. The operation principle of the 5-wire type touch panel 25 will be described in more detail with reference to Figs. 4 to 7 . As shown in Fig. 4, the 5-wire touch panel consists of two resistive films and a glass film, a film, and a resistive film adhered to the inside of the glass screen and the film. Between the resistive film glass screen and the resistive film, spacers of uniform height are arranged at a certain interval. Usually, the two resistive films are not in contact with each other. Further, in the 5-wire type touch panel, the upper resistive film is used as a pin detector for voltage detection, and the lower resistive film is used to generate a divided voltage in accordance with the pressed point. Here, when the film side of the touch panel is pressed, the two resistive films are in contact with each other. # Picture 5 shows the position voltage detection method in the X direction. The resistive film film has a uniform resistance 成 proportional to the distance. Therefore, as shown in Fig. 5, when contacting PI, P2, P3, and P4, current flows from the P1-P4 side to the P2-P3 side. In this state, the lower resistive film generates a voltage gradient, so that the X-direction position voltage at any point on the touch panel can be measured by a voltmeter or an instrument capable of measuring voltage 値. Fig. 6 is a view showing a method of detecting a position voltage in the Y direction. As shown in Fig. 6, when contacting P 1 , P 2 , P 3 , P 4 , current flows from the p 3 - P 4 side to the P 1 - P 2 side ® . In this state, the lower resistive film generates a voltage gradient, so the positional voltage in the Y direction at any point on the touch panel is the same as the voltage in the X direction, and can be measured by a voltmeter or a voltage measuring device. To determine. Figure 7 shows the press detection method. As shown in Fig. 7, when the contacts P1, P2, P3, and P4 are contacted, the lower resistive film becomes the Lo level. Further, since the upper resistive film is connected to the power source by the boosting resistor, it becomes the Hi level. In this state, when the upper resistive film is pressed, the upper resistive film changes from the Hi level to the L 〇 level, so that the voltage 値 can be detected by a voltmeter or an instrument capable of measuring voltage 値, and the press can be detected. . -14 - (12) (12)1304943 By the above-mentioned position voltage detection method and pressing detection method, the control methods of P1, P2, P3, and P4 can be summarized as shown in Table 5. [Table 5] P1 P2 P3 P4 X position voltage detection Hi Lo Lo Hi Y position voltage detection Lo Lo Hi Hi Press to detect Lo Lo Lo Lo necessary number of switches (transistor) 2 1 2 2 2 ie related touch Three of the four switching units for detecting the voltage in the X direction and the Y direction of the panel require a pair of transistors, whereas the remaining one can be constituted by only one transistor. (Control Circuit Unit 1 0) Fig. 8 shows the details of the control circuit unit 10. The control circuit unit 10 has five signal lines, and a switching unit is connected to each of the terminals (S W 1 #, SW2, SW3#, SW4, SW0#). The switch unit corresponds to the 4-wire touch panel shown in Fig. 2 and the 5-wire touch panel switch shown in Fig. 3, respectively. In other words, the switching unit to which the terminal SW0# of the detection panel is connected is provided with one transistor Q1. The switch unit connected to the four terminals SW1#, SW2, SW3#, and SW4 of the coordinate for obtaining the pressed position is connected to the SW1# by two transistors Q2 and Q3, and is connected to the SW2. It is formed by one transistor Q6, connected to S W3# by two transistors Q4 and Q5, and connected to SW4 by -15- (13) 1304943 is formed by two transistors Q7 and Q8. . When the control circuit unit 1 is applied to the 5-wire type, as described in Table 5, one of the four switching units for obtaining the coordinates of the pressed position can be constituted by one transistor. When the control circuit unit 1 is applied to a 4-wire touch panel, each of the switching units may be one transistor. Therefore, the control circuit unit 10 is provided with a control line 5 Wi reE I # for stopping the transistor. For example, when 5 Wir eE 1 # becomes high (Hi ), the transistor Q3, the transistor Q5, and the transistor Q7 are in a stopped state. Figure 9 shows this state. The control circuit unit in the state of Fig. 9 is a driver who drives a 4-wire touch panel, and the control circuit unit in the state shown in Fig. 8 drives a 5-line touch panel. The 5 WireEl# is controlled by the switch selection unit 3 3 of the panel controller. The control circuit unit 10 is provided with six analog switches 1 1-16. Analog switches 11, 14, and 16 are used in 4-wire touch panels, and analog switches 12, 13, and 15 are used in 5-wire touch panels. The analogy relationship is selected by the 5WireE2# control signal. When the signal of 5WireE2# is high (Hi), the analog switches 1 1, 14 and 16 become active. When the signal is low (l〇), the analog switches 12, 13 and 15 are in an operable state. This 5WireE2# is controlled by the connector switch selection unit 34. The analog switch 11 is connected to the four terminals (3pin, 2pin, 8pin, and 7pin) of the connector 20 to the input terminals ANO, AN1, AN2, and AN3 of the A/D converter. These four pins are connected to four electrodes in the x direction and the gamma direction of the touch panel. The analog switch is based on the three pins of the connector (! ρ丨η, 5 pi η, 6 pi 11 -16- (14) 1304943) connected to the Y-direction lower electrode (YL) and the X-direction right electrode ( XR), X-direction left electrode (XL) control signal. The analog switch 16 connects the four pins of the connector to the lower electrode (YL) in the Y direction. When the analog switch 1 2 is used in a 5-wire touch panel, the input terminals of the A/D converter are connected to the electrodes PI, P2, P3, and P4 at the four corners of the lower resistive film described in Figs. 4 to 7. The analog switch 13 connects the terminal AN14 to the φ 5-8 pin. The analog switch 15 inputs the control signals of the electrodes P3, P2, and P4 to the 2 pins, 3 pins, and 1 pin, respectively. The control circuit unit 1 is connected to the panel controller 30 of the microcontroller 50 and the A/D converter 52. As shown in Fig. 1, the panel controller 30 includes a panel main control unit 31. The panel main control unit 3 1, the switch controller 3, the switch selection unit 3 3, the connector switch selection unit 34, the drive method specific unit 35, the diagnosis unit 36, the parameter selection unit 37, and the module The selection unit 38 is controlled. The Φ switch controller 32 applies a high or low signal to the five terminals SW0# to SW4 in accordance with an instruction from the panel main control unit 31. The switch selecting unit 33 selects a transistor that can operate by controlling the voltage applied to the control line 5WireEl# to be high or low. The connector switch selecting unit 34 selects an analog switch that can be operated by controlling the voltage applied to the control line 5WireE2# to be high or low. The diagnosis unit 36 diagnoses the operation state of the transistor (switch unit) of the selected control circuit in accordance with a specific rule. The drive mode specifying unit 35 uses the diagnosing unit 3 6 ' to analyze the input signal obtained from the specific terminal of the A/D converter when the specific switch is operated, and connects the -17-(15) 1304943 to the link. The driving method of the touch panel of the device is specified. The switch selection unit 33 and the connector switch selection unit 34 control the outputs of the control lines 5WireEl# and 5WireE2# by the drive mode specifying unit 35 in accordance with the specific drive mode. The parameter selection unit 37 selects parameters necessary for executing the specific drive mode from the parameter memory 41. The module selection unit 38 selects a control program module necessary for executing the specific drive mode from the module memory 37. • The panel main control unit 31 is under the control of the main control unit 5 of the microcontroller 50. The signal input to the A/D converter 52 is input to the panel controller 30 by the main control unit 51. Further, the host computer is connected to the main control unit 51 via the input/output interface 53, and the pressed position data is output. The operation of the control unit 1 thus constructed will be described based on the flowchart of Fig. 1 . The touch panel is coupled to the connector (step 1). When a specific inspection signal is input to the microcontroller 50, the signal is sent from the main control unit 51 to the panel main control unit 31. The check signal can also be input to the microcontroller 50 from the connector when the touch panel is attached to the connector. _ In step 3, specify whether the connected touch panel is 4-wire type. In this embodiment, the switch selecting unit 33 sets the 5 WireEl# high "connector switch selecting unit 34 to 5WireE2# by the command from the panel main control unit 31, and the control circuit unit is shown in FIG. 1 〇 structure. Thereafter, the switch controller 32 checks the operation of the switch to determine whether or not the touch panel to be connected is a 4-wire type. For example, as shown in Table 6, when the switch unit connected to the terminal sw 1 # is inspected, 'the switch -18 - (16) 1304943 connected to the terminal SW2 is turned "on" and the switch unit connected to the terminal SW0# is turned on. Turn off, switch the opening and closing of the switch unit connected to the terminal s WI #, check the voltage level of the input terminal ΑΝ0 of the A/D converter at that time, and the opening and closing of the switch unit connected to the terminal SW 1 # When the output of the terminal ΑΝ0 is switched from high to low, the switch unit connected to the terminal SW1# operates in response to the 4-wire touch panel, and as a result, the touch panel to which the * is connected is judged to be 4-wire type. Touch the panel and move to step 1 1. • In addition, when the 5-wire touch panel is connected, ΑΝ0 is fixed to a high relationship, so it can be distinguished.

-19- (17) 1304943 [Table 6] Inspection object SW1# SW2 SW3# SW4 swo# Judgment 4-wire type SW1# ON ON (L〇) ON (Hi) OFF (Hi) AN0=H OFF OFF (Hi) AN0 =L SW2 ON ON (L〇) ON (Hi) OFF (Hi) AN1=L OFF OFF (Lo) AN1=H SW3# ON ON (L〇) ON (Hi) AN2=H OFF OFF (Hi) AN2= L SW4 ON ON (L〇) ON (Hi) AN3=L OFF OFF (L〇) AN3=H SW0# ON OFF (Hi) 2OFF (L〇) 1ON (Lo) AN1=H OFF 4ON (Hi) ©OFF (L〇) 3OF (Hi) AN1=L (discharges the charge at 4, does not make TP residual charge

When the output terminal AN 0 does not generate the aforementioned output, the process proceeds to step 5, and the specific touch panel is a 5-line type. The switch selection unit 33 sets the 5WireEl# signal to be low by the command from the panel main control unit 31, and the connector switch selection unit 34 sets 5WireE2# to be low, and the structure of the control circuit unit 10 is shown in FIG. . Thereafter, the operation of the switch is checked by the switch controller 32 to determine whether the connected touch surface -20 - (18) 1304943 is a 5-wire type. For example, as shown in Table 7, 'When checking the switching unit (transistor Q2, Q3) connected to the terminal SW1#, the switching unit connected to the terminals SW2, SW3#, and SW4 is turned on, and 'the connection is made to the terminal SW0#. The switching unit is turned off, and the switching unit connected to the terminal SW1# is switched on and off, and the output of the terminal AN 0 at that time is checked. When the output of the terminal ANO is switched from high to low, and the output of the terminal ANO is switched from high to low, the switch unit connected to the terminal SW1# operates in response to the 5-wire touch panel. As a result, the connected touch panel is judged to be a 5-line touch panel, and moves to step 2].

-21 - (19)1304943 [Table 7]

Inspection object SW1# SW2 SW3# SW4 swo# Judgment 5-line type Q] Q3 ON Lo (Q1 ON) AN 14=H (Set Diagenostic line (PE4) as input setting (Hi-Z)) Q1 OFF OFF (Hi) AN 14=L (Set the Diagnostic line (PE4) to the output setting, change it to L, and set it to the input setting (Hi-Z) after a certain period of time) Q2 Q2 ON Hi Lo Hi Hi Hi AN0=H (However, to 5WireE ]#=L Q3 Q3 OFF (Q2 ON, (Q6 ON) (Q4 OFF, (57E, 5WireE2#=L conditions are implemented) (H瀚) 〇3 OFF) Q5 ON) 〇SON) Q2 OFF Hi Lo Lo Lo AN0=L (However, 5WireEl#=L Q3 0N (Q2 OFF, (Q6 OFF) (Q4 ON, (57E, 5WireE2#= L condition) (Lo output) 〇3 ON Q5 OFF) Q8 OFF Q4 Q4 0M Hi Hi Hi Lo Hi AN2=H (However, 5WireEl#=L Q5 Q5 OFF (Q2 OFF, (Q6 ON) (Q4 ON, (Q7 0FF, , 5WireE2#= L Condition to implement) (H瀚) 〇3 ON) 〇5 OFF) 〇8 ON) Q4 OFF Lo Lo Hi Lo AN2=L (However, to 5WireEl#=L Q5 0N (Q2 ON, (Q6 OFF) (Q4 OFF, (Q7 ON, , 5WireE2#= L conditions are implemented) (Lo output) 〇3 OFF) 〇5 ON Q8 OFF Q7 Q7 ON Hi Hi Hi Hi Lo AN3=H (However, 5WireEl#=L Q8 Q8 OFF (Q2 OFF, (Q6 ON) (Q4 OFF, (57E, 5WireE2#= L condition) (H output) 〇3 ON) 05 ON) Q8 OFF) Q7 OFF Lo Lo Lo Hi AN3=L (However, the condition of 5WireEl#=L Q8 0N (Q2 ON, (Q6 OFF) (Q4 ON, (Q7 OFF, , 5WireE2#= L) To implement) (Lo output) 〇3 OFF) 05 OFF) 〇8 ON) Q6 Q6 OFF Hi Lo Lo Lo Lo AN1=H (Q2〇N, (Q6 OFF) (Q4 ON, (Q7 ON, (but, 5WireEl#=L, Q3 OFF) 〇5 OFF) 〇8 OFF) 5WireE2#= L conditions are implemented) Q6 ON Hi Lo Hi Lo Lo AN1=L (Q2 ON, (Q6 ON) (Q4 ON, (Q7 ON , (But, 5WireE]#=L, Q3 OFF) Q5 OFF) Q8 OFF) 5WireE2#= L condition is implemented.) When input terminal ΑΝ0 does not produce the aforementioned voltage level change, -22- (20) 1304943 It is determined that the connected touch panel is not a 4-wire type or a 5-wire type (or there is a possibility that a switch unit connected to the terminal SW 1 # is faulty), and an error signal is sent (step 7) ° AN 0 is not driven when the 4-wire touch panel is connected Therefore, no voltage changes, can be distinguished. In the case where the connected touch panel is specified to be 4-wire type, in step 1 1, the switch of the control circuit portion 1 is selected. In other words, the switch select unit 33 maintains the 5WireEl# signal high. The switch select unit 34 causes the 5 WireE2 signal to be high. The specific switch is enabled. Next, in step 13, the parameter selection unit 37 reads out various parameters suitable for the four-line type from the parameter memory 4 1 of the memory 40, and stores them in the memory 43. Specifically, the address of the parameter previously stored in the non-volatile memory 40 is written in the memory 43, and the parameter can be accessed by writing to the address of the memory 43. Such parameters may be given by weighting the predetermined voltage threshold or the start of the A/D conversion, or by switching the weights of the transistors that constitute the switching unit. In step 15, the module selecting unit 38 reads out the module corresponding to the 4-wire type control program from the module of the memory 40, and stores it in the memory 4 3 . Specifically, the address of the control program module previously stored in the non-volatile memory 40 is written in the memory 43, and the control program is read by writing the address of the memory 43 for use in the control circuit. Departmental control. In the case where the connected touch panel is specified to be 5-wire type, in step 21, the switch of the control circuit portion 10 is selected. That is, the 5 WireEl# signal is set to be low by the switch selection -23-(21) (21) 1304943 part 3 3, and the 5WireE2# signal is set to the low state by the connector switch selection unit 34, so that the specific The switch becomes operational. Next, in step 23, the parameter selection unit 37 reads out various parameters suitable for the 5-line type from the parameter memory 4 1 of the syllabus 40, and stores them in the memory 4 3 . Specifically, the address of the parameter previously stored in the non-volatile memory 40 is written in the memory 43, and the parameter can be accessed by writing to the address of the memory 43. Such parameters can be the same as in the case of the 4-wire type. In step 25, the module selection unit 38 reads out the module corresponding to the 5-line control program from the module 400 of the memory 40, and stores it in the memory 43. Specifically, the address of the control program module previously stored in the non-volatile memory 40 is written in the memory 43, and the control program is read by writing the address of the memory 43 and used in the control circuit unit. control. As described above, according to the control unit 1 of the present embodiment, when the touch panel of the different driving method shown in Figs. 2 and 3 is connected, the driving method of the touch panel can be automatically specified. Further, a specific switch can be selected from the control circuit unit in accordance with the specific driving method, and the operation can be performed. Thereby, the drive control of the two touch panels can be performed by one control unit. In this embodiment, the components of the control circuit unit are shared between the 4-wire drive mode and the 5-wire drive mode. Therefore, the number of elements of the control unit becomes small, which can be provided inexpensively. Next, the driving method of the touch panel connected to the connector 20 is specified, and the elements of the control circuit unit 10 are selected corresponding to the driving method, and further, the parameters and the control steps are necessary in order to operate the control circuit unit 10. -24- (22) 1304943 The selected mode control unit, whether it is acting as scheduled, is also automatically diagnosed. This diagnosis is performed at the beginning of the connection of the touch panel to the connector, and can also be performed periodically as one of the maintenance rings. In the case where the 4-wire touch panel shown in Fig. 2 is connected to the connector, the self-diagnosis is performed in accordance with the flowchart of Fig. 11. In step 31, when the check signal is input to the main control unit 51 of the microcontroller 50, the main control unit 51 sends an instruction to the panel main control unit 31 of the panel controller 30. The panel main control unit 31 checks whether the mode selected as the control program thereof is correctly operated (step 3 3 ). This check is performed, for example, by checking the checksum of all modules. When the selected module is not in use, that is, when there is a software error, an error message is sent (step 39). The error message is transmitted through the input and output interface by the microcontroller 50, for example, to the host computer. When the selected module is normal, the process proceeds to step 41 to perform a hardware check. Here, the hard body inspection is to check whether the functional parts of the control panel (specifically, the transistors constituting the switch unit) are normal (step 41). When the hardware inspection is also normal, the touch panel is driven (step 43). In addition, when the result of the hardware inspection is NG, error communication is performed (step 39). The hardware inspection in step 41 is controlled by the diagnosis unit 36 according to a program saved in advance, and the switch controller 3, the switch is controlled. The selection unit 3 3 and the connector switch selection unit 34 perform the selection. Specifically, each switch is operated in the same manner as in Table 6, and the voltage change at the input terminal of the A/D converter is analyzed. That is, the connection of -25- (23) 1304943 to the switch unit of terminal S W ] # is performed as follows. The switch unit of the terminal SW2 is turned on, and the switch unit of the terminal SW0# is turned off. When the switch unit of the terminal SW1# is turned on, the voltage level of the terminal ΑΝ0 is high, and when the switch unit of the terminal SW1# is turned off, the terminal ΑΝ0 If the voltage level is low, it is known that the switching unit connected to the terminal SW1# is normal, and the inspection of the switching unit connected to the terminal SW2 is performed as follows. The switching unit of the terminal SW1# is turned on, the switching unit of the terminal SW0# is turned off, and when the switching unit of the terminal SW2 is turned on, the voltage level of the terminal AN1 is low, and when the switching unit of the terminal SW2 is turned off, the terminal AN1 is If the voltage level is high, it is known that the switching unit connected to the terminal SW2 is normal. The inspection of the switch unit connected to the terminal SW3# is performed as follows. When the switch of the terminal SW4 is turned on and the switch of the terminal SW3# is turned on, the voltage level of the terminal AN2 is high, and when the switching unit of the terminal SW3# is turned off, when the voltage level of the terminal AN2 is low, it is known that the voltage is connected to The switch unit of terminal SW3# is normal. The inspection of the switching unit connected to the terminal SW4 is performed as follows. When the switch unit of the terminal SW3# is turned on, the switch unit of the terminal SW4 is turned on, the voltage level of the terminal AN3 is low, and when the switch unit of the terminal SW4 is turned off, the voltage level of the terminal AN3 is high, then it is known. The switching unit connected to the terminal SW4 is normally "connected to the inspection of the switch unit of the SW0# to be inspected" as follows. The switch unit of terminal S W ]# is turned off during inspection -26- (24) 1304943. Further, the switching unit of SW2 is turned off, and the voltage level of the terminal AN1 when the switching unit of SW0# is turned on is high. Then, in a state where the switching unit of the terminal S W0# is turned off, the switching unit of the terminal S W2 is turned on once, and the electric charge of the touch panel is released. After that, the switch unit of the terminal SW2 is set to off. At this time, if the voltage level of the terminal AN is low, it is judged that the switch unit connected to SW0# is normal. In this way, when the 4-wire touch panel is connected, the touch panel can be used at all without diagnosing all the switches (transistors) necessary to drive it. In addition, the touch panel itself has an input even if there is a defect, the input of the A/D converter. Since the voltage level of the terminal becomes unstable, it is also possible to determine which switch is defective in the case of performing the aforementioned diagnosis. However, by performing such a diagnosis, it can be understood which one of the touch panel or the control unit has a defective hardware element. Therefore, maintenance work such as analysis of the cause of the system failure can be easily performed by the problem that the specific hardware is problematic, and the operation can be performed quickly. The order of the switches to be inspected is not particularly limited. The self-diagnosis of the 5-wire touch switch is performed as follows. The self-diagnosis of the 5-wire touch switch is the same as that of the 4-wire touch switch, and is performed according to the flowchart of Fig. 11. However, the operation of the switch is performed in accordance with Table 7. Further, when the switching operation of Table 7 is performed, in this embodiment, as shown in Fig. 3, a Diagnostic line (diagnostic line) is added. This diagnostic line is connected to the upper resistive film (power supply side resistive film) that constitutes the touch panel. This diagnostic line is set to discharge the charge of the touch panel which is turned on when the switch unit for pressing the determination is turned on at any timing. -27- (25) 1304943 When the 5-wire touch switch of Figure 3 is connected, the hardware inspection in step 41 is as shown in Table 7, and each switch (transistor) is operated in sequence to 'analyze its Terminal output. The inspection of the transistor Q 1 constituting the switching unit of the terminal s W 0 # is performed as follows. During the press wait, the upper resistive film is in a charged state because the switching unit of the terminal SW0# is turned on. During operation, it is ran away by being pressed through the lower resistive film. However, in the case of self-diagnosis, it is not accompanied by the user's operation, so the charge does not run away except for the natural discharge. Therefore, even if the input terminal AN 1 4 ' of the A/D converter is detected, the voltage level change (high/low state change) is not instantaneously caused by the ON/OFF of the SW0# switching unit. Therefore, as shown in Fig. 1, using any input/output 埠 (here, set to PE4) of the microcontroller, the charge of the upper resistive film is performed by changing it to a lower output. The discharge makes it possible to immediately judge that the switching unit of the terminal SW0# is turned off. Specifically, the quasi-breaking line is set to a high impedance state, and the transistor Q1 constituting the switch of the terminal SW0# is turned on. At this time, the upper resistive film is boosted by the resistor R, and the voltage level of the input terminal AN 14 becomes high. Thereafter, the switching unit of the terminal SW0#, that is, the transistor Q1 is turned off, the diagnostic line is made low, and the electric charge of the touch panel is discharged. After a certain period of time, 'restore the diagnostic line to high impedance. Thereafter, the voltage level of the input terminal AN 1 4 is confirmed, and if it is low, it can be confirmed that the transistor Q 1 is in a normal operation. When the switching unit connected to the terminals of other control lines is inspected, the switching unit (transistor Q) of the terminal sW0# is set to be in a normally closed state. -28- (26) 1304943 The inspection of the transistors Q2 and Q3 constituting the switching unit of the terminal SW1# was performed as follows. When the terminals SW2, SW3#, and SW4 are all set to high, as shown in Fig. 13, the electrodes P2, P3, and P4 are all low. Here, when the terminal SW1# is set to be low, the electrode PI becomes high. The voltage level of the input terminal AN0 connected to the electrode P1 becomes high. Thereafter, when the terminals SW2, SW3#, and SW4 are all set to be low, the electrode P3 is turned off, and the electrodes P2 and P4 are both high. At this time, when the terminal S W 1 # is set high, the electrode P 1 is low. The voltage level of the input terminal ΑΝ0 connected to the electrode P 1 is also low. If Q2 or Q3 is not in normal operation, 'the voltage level is assumed to be different depending on the influence of the electrode that is not directly connected to the input terminal ΑΝ0. Therefore, when the above operation is normally performed, it can be determined that the transistors Q2 and Q3 are both It is normal. Similarly, the inspection of the switching units (the transistors Q4 and Q5) connected to the terminal S W3 # of the control line is performed as follows. When the terminals SW1#, SW2, and SW4 are all set to high, the electrodes pi, P3, and P4 are all low. Here, when the terminal SW3# is set to be low, the electrode p2 is made high, and the voltage level of the input terminal AN2 connected to the electrode P2 is high. Thereafter, when the terminals SW1#, SW2, and SW4 are all set to low, the electrode P3$ is turned off, and the electrodes P1 and P4 are both high. At this time, if the terminal SW3# is set to be high, the electrode P2 is low, and the voltage level of the input terminal AN2 connected to the electrode P2 is also low. If Q4 or Q5 is not in normal operation, the voltage level is assumed to be a different result according to the influence of the electrode not directly connected to the input terminal AN2. Therefore, when the above action is normally performed, -29-(27) (27 ) 1304943 It can be determined that the transistors Q4 and Q5 are all normal. Similarly, the inspection of the switching units (the transistors Q 7 and Q 8 ) connected to the terminals S W 4 of the control line is performed as follows. When the terminals SW1#, SW2, and SW3# are all set to high, the electrodes PI, P3, and P2 are all low. Here, when the terminal SW4 is set to be low, the electrode P4 becomes high. The voltage level of the input terminal AN3 connected to the electrode P4 becomes high. Thereafter, when the terminals SW1#, SW2, and SW3# are all set to be low, the electrode P3 is turned off. The electrodes P1 and P2 are both high. At this time, if the terminal SW4 is set to be high, the electrode P4 is low, and the voltage level of the input terminal AN3 connected to the electrode P4 is also low. If Q7 or Q8 is not in normal operation, the voltage level is assumed to be different depending on the influence of the electrode that is not directly connected to the input terminal AN3. Therefore, when the above operation is normally performed, it can be determined that the transistors Q7 and Q8 are both It is normal. The inspection of the switching unit (transistor Q6) connected to the terminal SW2 is performed as follows. When the terminals SW1#, SW3, and SW4 are all set to be low, the electrodes P1, P2, and p4 are both high. Here, when the terminal SW2 is set to be low, the electrode P3 becomes high. The voltage level of the input terminal AN13 connected to the electrode P3 becomes high. Thereafter, when the terminal SW2 is set to be low, the electrode P3 is made low, and the voltage level of the input terminal AN1 connected to the electrode p3 is also low. If Q6 is not normally operated, the voltage level assumed to be different depending on the influence of the electrode directly connected to the input terminal AN1 is different. Therefore, when the above operation i is often performed, it can be determined that the transistor Q6 is normal. In this way, when the 5-wire is connected to the touch panel, the touch panel -30-(28) 1304943 touch panel can be used to diagnose all the necessary elements (transistors) for driving. In addition, even if there is a defect in the touch panel itself, the voltage level applied to the input terminal of the A/D converter ' does not change, and it is a result of the assumption. Therefore, in the case of performing the above-described diagnosis, it may be determined as Which switch is bad. However, by performing such a diagnosis, it can be understood which one of the touch panel or the control unit has a defective hardware element. Therefore, it is easy to perform maintenance work such as analysis of causes when the system is defective. • The order of the switch unit (transistor) to be inspected is not specifically limited. The invention is not limited to the embodiments of the invention described above and the description of the embodiments. Various modifications may be made without departing from the scope of the patent application, and various modifications are possible within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the entire construction block of the control unit of the present invention. Fig. 2 shows the driving principle of the 4-wire touch panel. • Figure 3 shows the driving principle of a 5-wire touch panel. Fig. 4 is a view showing the basic configuration of the same 5-wire type touch panel. Fig. 5 is a view showing the X-direction driving of the same 5-wire type touch panel. Fig. 6 is a view showing the Y-direction driving of the same 5-wire type touch panel. Fig. 7 is a view showing the principle of pressing detection of the same 5-wire type touch panel. Fig. 8 is a detailed view of a control circuit unit (5-line type correspondence) of the embodiment. Fig. 9 is a detailed view of a control circuit unit (4-wire type) of the embodiment - 31 - (29) (29) 1304943 1 0 is a flow chart showing the action of automatically understanding the driving mode of the touch panel. Figure 11 is a flow chart illustrating the self-diagnosis action of the touch panel. Fig. 1 is a diagram showing the principle of self-diagnosis of the switching unit of the pressing detection terminal SW0# in the 5-wire type touch panel. Fig. 13 is a diagram showing the self-diagnosis principle of the switching unit of the terminal SW1# in the 5-wire type touch panel. [Description of main component symbols] 1 〇: Control circuit sections 11 to 1 6 : Analog switch 20 : Connector 3 〇 : Panel controller 3 1 : Panel main control section 3 2 : Switch controller 3 3 : Switch selection section 3 4 : Connector selection unit 3 5 : Drive system specific unit 3 6 : Diagnostic unit 3 7 : Parameter selection unit 3 8 : Module selection unit 40 : Memory 4 1 : Parameter unit 42 : Module memory - 32 - (30) (30)1304943

5 0 : Microcontroller 5 1 : Main control unit 52 : A/D converter 53 : Input/output interface -33-

Claims (1)

Qing. Revised on July 7 1304943 X. Patent Application No. 94 1 3 3 3 72 Patent Application Chinese Patent Application Revision Amendment October 7, 1997 Revision 1 A control unit for a touch panel is used to control driving in the first driving mode. a first touch panel and a control unit that drives the second touch panel by the second driving method; and is characterized by: a first control circuit unit corresponding to the first driving method; a second control circuit unit corresponding to the second driving method; a connector for connecting the first touch panel and the second touch panel; and a connection to the connector The driving mode specifying unit of the driving method of the touch panel; and the first selecting unit of the control circuit unit is selected according to a driving method specified by the driving method specifying unit. 2. The touch panel control unit according to the first aspect of the invention, wherein the first control circuit unit and the second control circuit unit share a switch unit; and the switch unit is associated with a touch panel X. Three of the four switching units for detecting the voltage in the direction and the Y direction have a pair of transistors, and the other one is formed by one transistor; in the case where the first driving method is the 4-wire driving method One of the transistors constituting each of the three switches is in a stopped state. 3. Touch surface as described in item 1 or 2 of the patent application scope 1304943 Further, the plate control unit further includes: - a first 'parameter storage unit that stores the first parameter for performing the first drive mode; and a second parameter storage for storing the second parameter of the second drive mode a first program module storage unit that stores a first control program module for implementing the first drive mode; g a second program module that stores a second control program module for executing the second drive method a second selection unit that selects a parameter based on a drive mode specified by the drive mode specific unit; and a third selection unit that selects a control program module based on a drive mode specified by the drive mode identification unit . Ι3Ό4943 Patent Application No. 94133372 Chinese Picture Revision Page Lien? The next day's repair: Hungry 1丨 The Republic of China revised on September 8, 1997 10 Sensation 8S 1304943 month 1 愧9S