TWI423019B - Detection device for providing resistive touch position information and detection system using the same - Google Patents

Description

Detection device for providing resistive touch position information and detection system using the same

The present invention relates to a detection technique, and more particularly to a device for detecting a circuit board to be tested and a detection system using the same.

With the rapid development and application of information technology, wireless mobile communication and information appliances, in order to carry more convenient, lighter and more user-friendly, many information products have been input devices such as traditional keyboards or mice. A touch panel (Touch Panel) is added as an input device.

Generally, products with resistive touch panels, such as mobile phones with touch panels, personal digital assistants (PDAs), need to touch the panel through human touch or through a test mechanism during testing. Specific location for functional testing of this product. However, the artificial touch method may have a situation in which the touch position is not correct due to the artificial mental discomfort. This type of testing by interacting with physical panels is time consuming and costly. In addition, the test position and test of the touch panel will also affect the test speed and test accuracy. The design of the test facility is also quite complicated.

How to implement a detection fixture can test the circuit board of the resistive touch panel without using a physical resistive touch panel to facilitate testing by the tester, which is a problem to be overcome.

The invention provides a detecting device for providing resistive touch position information and a detecting system using the same, which does not need to install a high-cost touch panel when detecting a unit to be tested (a circuit board to be tested), thereby improving test speed and accurate test. Sex.

The invention provides a detecting device for providing a resistive touch position information, which is suitable for detecting a unit to be tested. The unit to be tested performs a function according to the resistive touch position. The detecting device includes a resistive touch position generating unit, a switching unit, and a control unit. The resistive touch position generating unit is composed of a plurality of resistors for generating touch position information. The switching unit is coupled to the resistive touch position generating unit for switching a coordinate value of the touch position information. The control unit is coupled to the switching unit and the unit to be tested, and the control unit controls operation of the switching unit and the unit to be tested, and selectively controls the coordinates of the touch position information. a value, the unit to be tested performs a function associated with the coordinate value and outputs a test result, and the control unit determines whether the function performed by the unit to be tested is normal according to the test result.

The invention further provides a detection system for providing a resistive touch position information. The detection system includes a unit to be tested, a resistive touch position generating unit, a switching unit, and a control unit. The unit to be tested performs a function according to the resistive touch position. The resistive touch position generating unit is composed of a plurality of resistors for generating touch position information. The switching unit is coupled to the resistive touch position generating unit for switching a coordinate value of the touch position information. The control unit is coupled to the switching unit and the unit to be tested, and the control unit controls operation of the switching unit and the unit to be tested, and selectively controls the coordinates of the touch position information. a value, the unit to be tested performs a function associated with the coordinate value and outputs a test result, and the control unit determines whether the function performed by the unit to be tested is normal according to the test result.

In an embodiment of the invention, the resistive touch position generating unit includes a first series resistor and a second series resistor. The first series resistor has a plurality of first outputs for providing a first axial position of the coordinate value, wherein each of the first outputs has a connection of two resistors on the first series resistor Point. a second series resistor having a plurality of second outputs for providing a second axial position of the coordinate value, wherein each of the second outputs is coupled to two resistors on the second series resistor Point.

In an embodiment of the invention, the switching unit includes a plurality of switches, each of which has a control end, and the first output ends are coupled to the respective lines corresponding to the second output ends. One of the switches, and the control unit controls the control terminals of each of the switches to determine whether the line is conducting.

In an embodiment of the invention, each of the first series resistance and the second series resistance is obtained by performing an equivalent resistance calculation on an actual touch position of the touch panel.

In an embodiment of the invention, the control unit further controls the switching unit to provide an operating voltage required for the unit to be tested to operate.

In an embodiment of the invention, the detecting device further includes an input and output unit coupled to the control unit and the unit to be tested, wherein the control unit transmits through the input and output unit Commanding to the unit to be tested, and the control unit and the unit to be tested perform bidirectional data transmission through the input and output unit.

Based on the above, the detecting device and the detecting system of the present invention mainly provide resistive touch position information for testing by the unit to be tested (the circuit board to be tested). In this way, the unit to be tested can be tested without a physical touch panel, thereby improving the test speed and the test accuracy.

The above described features and advantages of the invention will be apparent from the following description.

Reference will now be made in detail be made to the embodiments of the invention In addition, wherever possible, the same reference numerals in the drawings

1 is a block diagram of a detection system in accordance with an embodiment of the present invention. Please refer to Figure 1. The detection system 100 includes a detection device 110 and a unit under test UUT. In the detection system 100 of this embodiment, the detecting device 110 is adapted to detect the unit to be tested UUT, wherein the unit to be tested UUT may be a circuit board for a mobile phone or a personal digital assistant (PDA), but is not limited thereto. The unit to be tested UUT (that is, the circuit board to be tested) performs a function according to the resistive touch position. Here, for convenience of explanation, the touch position of the resistive touch panel is first defined as the X axis and the Y axis, and (X', Y') is expressed as the coordinate value of the touch position information, where X' Indicates the position in the X-axis direction, and Y' indicates the position in the Y-axis direction.

The detecting device 110 may include a resistive touch position generating unit S_TU, a switching unit 130, and a control unit 120. The resistive touch position generating unit S_TU of the embodiment does not include a solid resistive touch panel, but is composed of a plurality of resistors, and is mainly used to generate touch position information of the analog resistive touch panel. A detailed architecture regarding the resistive touch position generating unit S_TU will be described in the subsequent embodiments.

The switching unit 130 can be coupled to the control unit 120 and the resistive touch position generating unit S_TU, and the control unit 120 can be coupled to the switching unit 130 and the unit to be tested UUT. The control unit 120 can control the operation of the switching unit 130 and the unit to be tested UUT, and selectively control the coordinate value (X', Y') of the touch position information, so that the coordinate value (X', Y') is output. To the unit to be tested UUT. In this way, the unit under test UUT can perform the function associated with the coordinate value (X', Y') and output the test result TR, so that the control unit 120 can determine the function performed by the unit UUT to be tested according to the test result TR. Is it normal?

In this embodiment, the resistive touch panel of the entity is simulated by the constituent structure of the resistive touch position generating unit S_TU and the switching unit 130, so that the coordinate value (X', Y') of the accurate touch position information can be generated. Before detecting the UUT to be tested, there is no need to install a physical resistive touch panel, and the test does not need to be manually pressed, and no complicated test mechanism is needed, so the test speed and test of the UUT to be tested can be improved. accuracy.

Based on the teachings of the above embodiments, FIG. 2 is a block diagram of a detection system in accordance with another embodiment of the present invention. Here, please refer to Figure 2. The detection system 200 of this embodiment is similar to the detection system 100 of FIG. The detecting device 210 may include a resistive touch position generating unit S_TU, switching units 130A, 130B, and a control unit 120. The resistive touch position generating unit S_TU may include a first series resistor 220 and a second series resistor 230. The first series resistor 220 has a plurality of first output terminals X1 - X5 for providing an X-axis position of the coordinate value (X', Y'), wherein each of the first output terminals X1 - X5 is at the first position The connection point of the two resistors on the series resistor 220 is on. Similarly, the second series resistor 230 has a plurality of second output terminals Y1 Y Y5 for providing a Y-axis position of the coordinate value (X', Y'), wherein each of the second output terminals Y1 Y Y5 At the junction of the two resistors on the second series resistor 230.

The switching unit 130A and the switching unit 130B each include a plurality of switches (which may be implemented using a relay, but are not limited thereto), and each of the switches has a control terminal. One of the plurality of switches is coupled to each of the first output terminals X1 to X5 and the second output terminals Y1 to Y5. The control unit 120 can control the electrical and potential magnitudes of the first pair of axial ends XL and XR of the first series resistor 220, and can also control the second pair of axial ends YU and YD of the second series resistor 230. Electrical and potential size. The control unit 120 can also control the switching unit 130A and the switching unit 130B to control each of the closed control terminals to determine whether the first output terminals X1 to X5 and the second output terminals Y1 to Y5 are respectively connected to each other. This produces a coordinate value (X', Y'). Therefore, the control unit 120 can control the switching unit 130A and the switching unit 130B to switch the different touch position information so that the resistive touch position generating unit S_TU outputs the coordinate value (X', Y').

FIG. 3A is a schematic diagram illustrating an upper electrode plate and a lower electrode plate of the touch region 310 according to an embodiment of the invention. As shown in FIG. 3A , the resistive touch panel has a touch area 310 , and the touch area 310 has an upper electrode plate 320 and a lower electrode plate 330 . For convenience of explanation, the axial direction of the upper electrode plate 320 is defined as the X-axis direction, and the axial direction of the lower electrode plate 330 is defined as the Y-axis direction. There is a first pair of axial ends XL and XR in the X-axis and a second pair of axial ends YU and YD in the Y-axis. A touch position POS1 is drawn on the touch area 310, and is represented by "+" in FIG. 3A. When the touch position POS1 is touched, its coordinate value is transmitted to the unit UUT to be tested. The equivalent resistance measurement of the touch position POS1 is described in detail below.

FIG. 3B illustrates a schematic diagram of equivalent resistance conversion of the touch region 310 in the X-axis direction. In FIG. 3B, when the touch position POS1 is touched, the touch points of the upper electrode plate 320 and the lower electrode plate 330 are electrically connected. The operating voltage VCC is supplied at the axial end XL, and the current I1 is read between the operating voltage VCC and the axial end XL, while the voltage V1 is read at the axial end YU. In the present embodiment, since the voltage at the axial end YD is not read, the open circuit is formed. Therefore, the equivalent resistance RXA of the touch position POS1 in the X-axis direction is equal to the voltage V1 divided by the current I1. The X-axis equivalent total resistance is equal to the voltage VCC divided by the current I1, which is also equal to the resistance RXA plus the resistance RXB.

FIG. 3C illustrates a schematic diagram of equivalent resistance conversion of the touch region 310 in the Y-axis direction. Figure 3C is similar to the conversion of Figure 3B. The operating voltage VCC is supplied at the axial end YU, and the current I2 between the operating voltage VCC and the axial end YU is read, and the voltage V2 is read at the axial end XL. In the present embodiment, since the voltage of the axial end XR is not read, the open circuit is formed. Therefore, the equivalent resistance RYA of the touch position POS1 in the Y-axis direction is equal to the voltage V2 divided by the current I2. The Y-axis equivalent total resistance is equal to the voltage VCC divided by the current I2, which is also equal to the resistance RYA plus the resistance RYB.

4 is a graph showing the actual touch position according to an embodiment of the present invention. In Fig. 4, Xa, Xb, ..., Xn are present in the X-axis direction, and Ya, Yb, ..., Yn are present in the Y-axis direction. The actual touch position is represented by "+", and the touch positions POS1, POS2, POS3, POS4, and POS5 correspond to actual coordinate values (Xa, Yn), (Xa, Ya), (Xc, Yc), (Xn, Yn), respectively. , (Xn, Ya). The touch position shown in FIG. 4 is only a few alternative embodiments, and the present invention is not limited thereto.

Please refer to FIG. 2 and FIG. 4 together. Regarding the arrangement manner of the resistive touch position generating unit S_TU, the converted equivalent resistance can be sorted from high to low in order to complete the first series resistor 220 and the second series resistor 230. It is assumed that X1', X2', X3', X4', X5' may correspond to Xa, Xb, Xc, Xd, Xn, respectively, and Y1', Y2', Y3', Y4', Y5' may correspond to Ya, Yb, respectively. Yc, Yd, Yn. When the detecting device 210 is to perform the function test of the touch position POS1, since the actual coordinate value is (Xa, Yn), the control unit 120 needs to turn on the line of the output terminal X1 of the first series resistor 220, and the second series resistor is turned on. The line of output Y5 of 230 is turned on, thereby providing an analog coordinate value (X1', Y5') to the unit under test UUT. In this way, the unit under test UUT performs the function associated with the coordinate value (X1', Y5') and outputs the test result TR, so that the control unit 120 can determine the function performed by the unit UUT to be tested according to the test result TR. It is normal to try.

Similarly, when the detecting device 210 is to perform the function test of the touch position POS5, the touch position POS5 corresponds to the actual coordinate value (Xn, Ya). The control unit 120 needs to turn on the line of the output terminal X5 of the first series resistor 220, and turn on the line of the output terminal Y1 of the second series resistor 230, thereby providing the simulated coordinate value (X5', Y1') to the unit to be tested. UUT.

In addition, FIG. 5 is a block diagram of a detection system in accordance with another embodiment of the present invention. Please refer to Figure 5. The detection system 500 includes a detection device 510 and a test unit UUT. In the detection system 500 of this embodiment, the detecting device 510 is adapted to detect the unit to be tested UUT, wherein the unit to be tested UUT may be a circuit board for a mobile phone or a PDA, but is not limited thereto, and the unit to be tested UUT ( That is, the board to be tested) performs functions according to the resistive touch position. The detecting device 510 may include a resistive touch position generating unit S_TU, a switching interface 530, and a control unit 520. Similarly, the resistive touch position generating unit S_TU of the embodiment does not include a resistive touch panel, but is composed of a plurality of resistors, and is mainly used to generate touch position information of the analog resistive touch panel. The switching interface 530 can be coupled to the control unit 520 and the resistive touch position generating unit S_TU. The switching interface 530 may include a switching unit 540 (similar to the switching units 103A and 130B of the foregoing embodiment) and an input/output (I/O) unit 550.

The switching unit 540 can be coupled to the control unit 120 and the resistive touch position generating unit S_TU, and the input and output unit 550 can be coupled to the control unit 520 and the unit to be tested UUT. The control unit 120 can control the operation of the switching unit 540, the input and output unit 550, and the unit to be tested UUT, and selectively control the coordinate value (X', Y') of the touch position information through the switching unit 540 to make the coordinate value ( X', Y') is output to the unit UUT to be tested. In this way, the unit under test UUT can perform the function associated with the coordinate value (X', Y') and output the test result TR, thereby causing the control unit 520 to determine the function performed by the unit UUT to be tested according to the test result TR. Is it normal? This also achieves similar effects to the above embodiments.

However, this embodiment is different from the foregoing embodiments in that the control unit 520 can also control a part of the switches (for example, relays) in the switching unit 540 to provide an operating voltage required for the operation of the unit UUT to be tested. In addition, the control unit 520 can also directly transmit a command to the unit under test UUT through the input and output unit 550, thereby performing a function test or other control operation not related to the touch position, and the control unit 520 and the unit to be tested UUT can pass the The input and output unit 550 performs bidirectional data transfer.

In summary, the detecting device and the detecting system of the present invention mainly provide resistive touch position information for testing by the unit to be tested (the circuit board to be tested). In this way, the physical resistive touch panel can be installed before testing the unit to be tested, and no artificial pressing is required during the test, and no complicated testing mechanism is needed, so the test cost can be saved and the test is improved. Unit test speed and test accuracy.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and those skilled in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100. . . Detection Systems

110. . . Testing device

120. . . control unit

130, 130A, 130B. . . Switching unit

200. . . Detection Systems

210. . . Testing device

220. . . First series resistance

230. . . Second series resistance

310. . . Touch area

320. . . Upper electrode plate

330. . . Lower electrode plate

500. . . Detection Systems

510. . . Testing device

520. . . control unit

530. . . Switching interface

540. . . Switching unit

550. . . Input and output unit

I1, I2. . . Current

POS1 ~ POS5. . . Touch position

RXA, RXB, RYA, RYB. . . resistance

S_TU. . . Resistive touch position generating unit

TR. . . Test Results

UUT. . . Unit to be tested

VCC. . . Operating Voltage

V1, V2. . . Voltage

X, Y. . . axis

XL, XR. . . First pair of axial ends

X1～X5. . . First output

YU, YD. . . Second pair of axial ends

Y1～Y5. . . Second output

(Xa, Yn), (Xa, Ya), (Xc, Yc), (Xn, Yn), (Xn, Ya). . . Actual coordinate value

(X’, Y’). . . Coordinate value

1 is a block diagram of a detection system in accordance with an embodiment of the present invention.

2 is a block diagram of a detection system in accordance with another embodiment of the present invention.

FIG. 3A is a schematic diagram illustrating an upper electrode plate and a lower electrode plate of the touch region 310 according to an embodiment of the invention.

FIG. 3B illustrates a schematic diagram of equivalent resistance conversion of the touch region 310 in the X-axis direction.

FIG. 3C illustrates a schematic diagram of equivalent resistance conversion of the touch region 310 in the Y-axis direction.

4 is a graph showing the actual touch position according to an embodiment of the present invention.

Figure 5 is a block diagram of a detection system in accordance with another embodiment of the present invention.

100. . . Detection Systems

110. . . Testing device

120. . . control unit

130. . . Switching unit

S_TU. . . Resistive touch position generating unit

TR. . . Test Results

UUT. . . Unit to be tested

(X’, Y’). . . Coordinate value

Claims (12)

A detecting device for providing resistive touch position information, which is suitable for detecting a unit to be tested, and the unit to be tested performs a function according to a resistive touch position, the detecting device comprising: a resistive touch position generating unit, a plurality of resistors for generating a touch position information; a switching unit coupled to the resistive touch position generating unit for switching a value of the touch position information; and a control unit coupled to the The switching unit and the unit to be tested, the control unit controls the operation of the switching unit and the unit to be tested, selectively controls the coordinate value of the touch position information, and the unit to be tested performs a function associated with the coordinate value And outputting a test result, and the control unit determines whether the function performed by the unit to be tested is normal according to the test result. The detecting device for providing a resistive touch position according to the first aspect of the invention, wherein the resistive touch position generating unit comprises: a first series resistor having a plurality of first outputs for providing the coordinates a first axial position of the value, wherein each of the first output terminals is at a junction of two resistors on the first series resistor; and a second series resistor having a plurality of second outputs a second axial position for providing the coordinate value, wherein each of the second output terminals is located at a junction of two resistors on the second series resistor. The detecting device for providing a resistive touch position according to the second aspect of the invention, wherein the switching unit comprises a plurality of switches, each of the plurality of switches has a control end, and the first output ends and the plurality of One of the two outputs corresponding to the two outputs is coupled to one of the switches, and the control unit controls each of the controlled terminals to determine whether the line is turned on. The detecting device for providing a resistive touch position according to claim 2, wherein each of the first series resistor and the second series resistor is an actual touch position of a touch panel Obtained by performing equivalent resistance calculation. The detecting device for providing a resistive touch position according to claim 1, wherein the control unit further controls the switching unit to provide an operating voltage required for the unit to be tested to operate. The detecting device for providing a resistive touch position according to the first aspect of the invention, wherein the detecting device further comprises: an input/output unit coupled to the control unit and the unit to be tested, wherein the control unit passes the The input/output unit transmits a command to the unit to be tested, and the control unit and the unit to be tested perform bidirectional data transmission through the input and output unit. A detection system for providing resistive touch position information, comprising: a unit to be tested, performing a function according to a resistive touch position; and a resistive touch position generating unit, comprising a plurality of resistors for generating a touch Position information; a switching unit coupled to the resistive touch position generating unit for switching a target value of the touch position information; and a control unit coupled to the switching unit and the unit to be tested, the control The unit controls the operation of the switching unit and the unit to be tested, and selectively controls the coordinate value of the touch position information, the unit to be tested performs a function associated with the coordinate value and outputs a test result, and the control unit is configured according to the The test result is used to determine whether the function performed by the unit to be tested is normal. The detection system for providing resistive touch position information according to claim 7 , wherein the resistive touch position generating unit comprises: a first series resistor having a plurality of first outputs for providing the a first axial position of the coordinate value, wherein each of the first output terminals is at a junction of two resistors on the first series resistor; and a second series resistor having a plurality of second outputs And a second axial position for providing the coordinate value, wherein each of the second output terminals is located at a connection point of the two resistors on the second series resistor. The detection system for providing resistive touch position information according to claim 8 , wherein the switching unit comprises a plurality of switches, each of the switches has a control end, and the first output ends Each of the two outputs corresponding to the second output is coupled to one of the switches, and the control unit controls each of the controlled terminals to determine whether the line is turned on. The detecting system for providing resistive touch position information according to claim 8 , wherein each of the first series resistor and the second series resistor is actually touched by a touch panel The position is obtained by performing an equivalent resistance calculation. A detection system for providing resistive touch position information as described in claim 7 wherein the control unit further controls the switching unit to provide an operating voltage required for operation of the unit to be tested. The detection system for providing resistive touch position information according to claim 7 , wherein the detection system further comprises: an input/output unit coupled to the control unit and the unit to be tested, wherein the control unit passes The input/output unit transmits a command to the unit to be tested, and the control unit and the unit to be tested perform bidirectional data transmission through the input and output unit.