CN112363083A - Capacitive touch screen sensor circuit detection board and detection method thereof - Google Patents
Capacitive touch screen sensor circuit detection board and detection method thereof Download PDFInfo
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- CN112363083A CN112363083A CN202011336814.4A CN202011336814A CN112363083A CN 112363083 A CN112363083 A CN 112363083A CN 202011336814 A CN202011336814 A CN 202011336814A CN 112363083 A CN112363083 A CN 112363083A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Abstract
The invention provides a capacitive touch screen sensor circuit detection board and a detection method thereof, which can timely and quickly judge the defects of open circuit and short circuit in the preparation process of a driving channel and a sensing channel, so that defective products do not flow into the next process, and waste of other auxiliary materials and labor cost is avoided.
Description
Technical Field
The invention relates to the field of capacitive touch screens, in particular to a capacitive touch screen sensor circuit detection board and a detection method thereof.
Background
With the development of the electronic industry, touch screens have been applied to various electronic devices. The capacitive touch screen is popular with people due to high sensitivity and smooth operation. The sensor is a core component of the capacitive touch screen, and is generally composed of a driving circuit TX and a sensing circuit RX. The driving circuit TX consists of a plurality of channel circuits Chanel which are parallel to each other and are called TX Chanel; the inductive circuit RX is composed of a plurality of channel circuits Chanel parallel to each other, and is called RX Chanel. A node capacitance is formed between TX Chanel and RX Chanel. Taking finger touch as an example, when a finger touches the surface of the touch screen, a coupling capacitor is formed between the finger and the TX Chanel and the RX Chanel to cause weak change of current, and the capacitance change of a touch point is detected by scanning the TX electrode matrix and the RX electrode matrix to calculate the position of the finger.
When a short circuit occurs between adjacent channel circuits Chanel or an open circuit occurs in a channel circuit Chanel, the capacitance charging and discharging variation is abnormal, so that the detection touch coordinate is invalid and is a defective product or an unqualified product. Such defective products or defective products are mostly generated in the respective steps of production and manufacture. When every process finishes, need in time test the product, prevent that the defective products from flowing into next process, cause the waste of other auxiliary material and human cost.
In a conventional capacitive touch screen testing method, after a touch screen sensor is completed, a probe test or a false binding test is performed to perform function judgment. The method has hysteresis, cannot monitor the production process of products, and selects out defective products in time, so that the defective products flow into the next process, and waste of other auxiliary materials and labor cost is caused.
Disclosure of Invention
In order to solve the above problems, the present invention provides a capacitive touch screen sensor circuit detection board and a detection method thereof, and particularly provides a capacitive touch screen sensor circuit detection board, which includes a driving channel detection board and an induction channel detection board, wherein the driving channel detection board is used for detecting a circuit of a driving channel, and the induction channel detection board is used for detecting a circuit of an induction channel; the drive channel detection board comprises a drive channel detection board supporting frame, a drive channel detection board detection frame, a drive channel body end short-circuit line, a drive channel detection product placing area, a drive channel detection board first test point, a drive channel binding PIN end short-circuit line and a drive channel detection board second test point, when a product to be detected is arranged in the drive channel detection product placing area, the drive channel body end short-circuit line is connected with a drive channel body of the product to be detected, the drive channel binding PIN end short-circuit line is connected with a drive channel binding PIN of the product to be detected, and the drive channel body and the drive channel binding PIN of the product to be detected respectively take the drive channel detection board first test point and the drive channel detection board second test point on the drive channel detection board as two end points and pass through the drive channel body end short-circuit line, The PIN-end short-circuit wire bound by the driving channel and the outgoing line of the driving channel of the product to be detected are connected end to form a series circuit; the induction channel detection plate comprises an induction channel detection plate supporting frame, an induction channel detection plate detection frame, an induction channel body end short-circuit line, an induction channel detection product placement area, an induction channel detection plate first test point, an induction channel binding PIN end short-circuit line and an induction channel detection plate second test point The induction channel is connected with the PIN end short-circuit wire and the induction channel outgoing line of the product to be detected end to form a series circuit.
Furthermore, the drive channel body end short-circuit line on the drive channel detection board and the drive channel body short-end outgoing line on the drive channel can be correspondingly connected, and the drive channel binding PIN end short-circuit line and the drive channel binding PIN short-end outgoing line can be correspondingly connected.
Furthermore, the sensing channel body end short-circuit line on the sensing channel detection board and the sensing channel body short-circuit line on the sensing channel can be correspondingly connected, and the sensing channel binding PIN end short-circuit line and the sensing channel binding PIN short-circuit line can be correspondingly connected.
The invention also provides a method for detecting the sensor circuit of the capacitive touch screen, which comprises the following steps:
a. detection drive channel circuit:
in the manufacturing process of the driving channel, a driving channel body end short-circuit wire and a driving channel binding PIN end short-circuit wire are respectively designed and manufactured at the positions, corresponding to the driving channel body short-end outgoing wire and the driving channel binding PIN short-end outgoing wire, on a driving channel detection board supporting frame, and adjacent channels are connected end to form a series circuit;
leading out a first test point of a drive channel detection plate and a second test point of the drive channel detection plate from the head end and the tail end of the series circuit;
measuring the resistance value between two points of a first test point of a drive channel detection plate and a second test point of the drive channel detection plate, and judging whether a product to be detected has an open circuit or a short circuit;
the driving channel after series connection is an equivalent circuit, each channel can be equivalent to a resistor, and after all the channels are connected in series, the resistance values of the first test point of the driving channel detection plate and the second test point of the driving channel detection plate are the sum of the resistors of all the channels. And when an open circuit occurs in the channel or the outgoing line is open, measuring the resistance value between two points of the first test point of the drive channel detection plate and the second test point of the drive channel detection plate, and displaying the state of the open circuit. When the channel is short-circuited or the outgoing line of the channel is short-circuited, measuring the resistance value between the first test point of the drive channel detection plate and the second test point of the drive channel detection plate, wherein the resistance value is lower than a normal value, and judging that the product has a short-circuit condition;
b. circuit for detecting induction channel
In the manufacturing process of the induction channel, a short-circuit line at the end of the induction channel body and a short-circuit line at the end of the induction channel bound PIN are designed and manufactured at the positions, corresponding to the short-end outgoing line of the induction channel body and the short-end outgoing line bound with the induction channel, on a supporting frame of the induction channel detection board, and adjacent channels are connected end to form a series circuit;
leading out a first test point of a sensing channel detection plate and a second test point of the sensing channel detection plate from the head end and the tail end of the series circuit;
and measuring the resistance value between the first test point of the sensing channel detection plate and the second test point of the sensing channel detection plate, and judging whether the product to be detected has an open circuit or a short circuit.
Similarly, the induction channel after series connection is an equivalent circuit. Each channel can be equivalent to a resistor, and after all the channels are connected in series, the resistance values of the first test point and the second test point of the sensing channel detection plate are the sum of the resistors of all the channels. When an open circuit occurs in the channel or the outgoing line is open, the resistance value between two points of the first test point of the sensing channel detection plate and the second test point of the sensing channel detection plate can be displayed as an open circuit state. When the channel is short-circuited or the outgoing line of the channel is short-circuited, the resistance value between the first test point and the second test point of the sensing channel detection plate is measured to be lower than a normal value, and the short-circuit condition of the product can be judged.
The capacitive touch screen sensor circuit detection board and the detection method thereof provided by the invention can timely and quickly judge the open circuit and short circuit defects in the production process of products, so that defective products do not flow into the next process, and waste of other auxiliary materials and labor cost is avoided.
Drawings
Fig. 1a is a schematic diagram of a driving channel detection plate structure, and fig. 1B is a schematic diagram of a sensing channel detection plate structure;
FIG. 2 is a schematic diagram of a driving channel structure in diagram A, and FIG. 2 is a schematic diagram of a sensing channel structure in diagram B;
FIG. 3 is a schematic view of a specific connection structure of a drive channel and a drive channel detection plate in an actual production process;
FIG. 4 is a diagram illustrating the resistance of the normal driving channels after the channels are connected in series;
FIG. 5 is a diagram illustrating the resistance of the driving channels connected in series after an open circuit occurs in the driving channels;
FIG. 6 is a diagram illustrating the resistance of the driving channels connected in series after a short circuit occurs in the driving channels;
FIG. 7 is a schematic view of a specific connection structure of an induction channel and an induction channel detection plate in an actual production process;
FIG. 8 is a diagram illustrating the resistance of the normal sensing channel after the channels are connected in series;
FIG. 9 is a schematic diagram of the resistance of the sensing channels after the sensing channels are connected in series after an open circuit occurs;
FIG. 10 is a diagram illustrating the resistance of the sensing channels after the sensing channels are connected in series after a short circuit occurs;
fig. 11 is a schematic structural diagram of a driving channel and a sensing channel combined together.
In the figure: 1-a drive channel detection plate support frame, 2-a drive channel detection plate detection frame, 3-a drive channel body end short-circuit line, 4-a drive channel detection product placement area, 5-a drive channel detection plate first test point, 6-a drive channel binding PIN end short-circuit line, 7-a drive channel detection plate second test point, 8-a drive channel detection plate, 9-a drive channel body, 10-a drive channel binding PIN, 11-a sense channel detection plate support frame, 12-a sense channel detection plate detection frame, 13-a sense channel body end short-circuit line, 14-a sense channel detection product placement area, 15-a sense channel detection plate first test point, 16-a sense channel binding PIN end short-circuit line, 17-a sense channel detection plate second test point, 18-sensing channel detection board, 19-sensing channel body, 20-sensing channel binding PIN, 21-driving channel leading-out wire, 22-sensing channel leading-out wire, 23-driving channel, 24-sensing channel, 25-driving channel body short-end leading-out wire, 27-driving channel binding PIN short-end leading-out wire, 26-sensing channel body short-end leading-out wire and 28-sensing channel binding PIN short-end leading-out wire.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1A and 1B and fig. 2A and 2B, the present invention provides a capacitive touch screen sensor circuit sense plate comprising two parts including a drive channel sense plate 8 and a sense channel sense plate 18, wherein the drive channel sense plate 8 is used to sense the circuit of a drive channel 23 and the sense channel sense plate 18 is used to sense the circuit of a sense channel 24.
The drive channel detection plate 8 comprises a drive channel detection plate supporting frame 1, a drive channel detection plate detection frame 2, a drive channel body end short-circuit line 3, a drive channel detection product placement area 4, a drive channel detection plate first test point 5, a drive channel binding PIN end short-circuit line 6 and a drive channel detection plate second test point 7, wherein the drive channel detection plate supporting frame 1 can be a waste edge in the drive channel production process and has the functions of supporting, protecting and setting an auxiliary target for the drive channel, the inner wall area of the drive channel detection product placement area 4 is the outline of the drive channel, when a product to be detected is placed in the drive channel detection product placement area 4, the drive channel body end short-circuit line 3 is connected with a drive channel body 9 of the product to be detected, the drive channel binding PIN end short-circuit line 6 is connected with the drive channel binding PIN10 of the product to be detected, and the drive channel body 9 and the drive channel binding PIN10 of the product to be detected respectively take the first test point 5 and the second test point 7 of the drive channel detection plate on the drive channel detection plate 8 as two end points, and are connected end to form a series circuit through the drive channel body end short-circuit wire 3, the drive channel binding PIN end short-circuit wire 6 and the drive channel outgoing wire 21 of the product to be detected.
The induction channel detection plate 18 comprises an induction channel detection plate supporting frame 11, an induction channel detection plate detection frame 12, an induction channel body end short wire 13, an induction channel detection product placing area 14, an induction channel detection plate first test point 15, an induction channel binding PIN end short wire 16 and an induction channel detection plate second test point 17, and similarly, the induction channel detection plate supporting frame 11 can be a waste edge in the production process of the induction channel and has the functions of supporting, protecting and arranging an auxiliary target and the like on the induction channel, the inner wall area of the induction channel detection product placing area 14 is the outline of the induction channel, when the induction channel detection product placing area 14 is internally provided with a product to be detected, the induction channel body end short wire 13 is connected with an induction channel body 19 of the product to be detected, and the induction channel binding PIN end short wire 16 is connected with an induction channel binding PIN 20 of the product to be detected, and the induction channel body 19 and the induction channel binding PIN 20 of the product to be detected are respectively connected end to form a series circuit by the induction channel body end short-circuit line 13, the induction channel binding PIN end short-circuit line 16 and the induction channel outgoing line 22 of the product to be detected by taking the first test point 15 and the second test point 17 of the induction channel detection plate on the induction channel detection plate 18 as two end points.
The invention also provides a method for detecting the circuit in real time in the production process of the capacitive touch screen sensor circuit, which can be particularly applied to the production process of medium and large-size touch products.
a. Detection drive channel circuit
According to the design shown in fig. 1A, fig. 2A and fig. 3, in the process of manufacturing the driving channel 23, the driving channel body end short-circuit line 3 and the driving channel binding PIN end short-circuit line 6 are respectively designed and manufactured at the positions, corresponding to the driving channel body short-end outgoing line 25 and the driving channel binding PIN short-end outgoing line 27, on the driving channel detection board supporting frame 1, and the adjacent channels are connected end to form a series circuit. And then a first test point 5 of the drive channel detection plate and a second test point 7 of the drive channel detection plate are led out from the head end and the tail end of the series circuit. Measuring the resistance value between the first test point 5 of the drive channel detection plate and the second test point 7 of the drive channel detection plate by using a universal meter or other instruments or equipment capable of testing the resistance value, and judging whether the product to be tested has an open circuit or a short circuit;
as shown in fig. 4, it is an equivalent circuit of the capacitive touch screen sensor of the present invention after the driving channels are connected in series. Each channel can be equivalent to a resistor R, and after all the channels are connected in series, the resistance values of the two points of the first test point 5 of the drive channel detection plate and the second test point 7 of the drive channel detection plate are R = R1+ R2+ R3+ R4+ R5+ R6+ R7+ R8.
As shown in fig. 5, it is an equivalent circuit of the capacitive touch screen sensor of the present invention after the driving channels are connected in series. When an open circuit occurs in the channel or the outgoing line is open, the resistance value R between the two points of the first test point 5 of the drive channel detection plate and the second test point 7 of the drive channel detection plate is measured, and the open circuit state can be displayed.
As shown in fig. 6, it is an equivalent circuit of the capacitive touch screen sensor of the present invention after the driving channels are connected in series. When the channel is short-circuited or the outgoing line of the channel is short-circuited, the resistance value between the first test point 5 of the driving channel detection plate and the second test point 7 of the driving channel detection plate is measured to be R = R1+ R3+ R4+ R5+ R6+ R7+ R8, and the resistance value is lower than a normal value, so that the condition that the product is short-circuited can be judged.
After the resistance test is qualified, the tested driving channel 23 (shown in fig. 2A, which includes the driving channel body 9, the driving channel binding PIN10, the driving channel outgoing line 21, the driving channel body short-end outgoing line 25, and the driving channel binding PIN short-end outgoing line 27) is separated along the inner edge of the detection frame 2 of the driving channel detection plate (i.e., the outer edge of the detection product placement area 4 of the driving channel), and referring to fig. 1A, the driving channel 23 is separated from the contact with the driving channel detection plate 8, and the subsequent functions of the driving channel 23 are not affected;
b. circuit for detecting induction channel
According to the design shown in fig. 1B, fig. 2B and fig. 7, in the manufacturing process of the sensing channel 24, a sensing channel body end short-circuit line 13 and a sensing channel binding PIN end short-circuit line 16 are respectively designed and manufactured at positions corresponding to the sensing channel body short-end outgoing line 26 and the sensing channel binding PIN short-end outgoing line 28 on the sensing channel detection board supporting frame 11, and adjacent channels are connected end to form a series circuit; leading out a first test point 15 of a sensing channel detection plate and a second test point 17 of the sensing channel detection plate from the head end and the tail end of the series circuit; and measuring the resistance value between the first test point 15 of the sensing channel detection plate and the second test point 17 of the sensing channel detection plate, and judging whether the product to be detected has an open circuit or a short circuit.
Fig. 8 shows an equivalent circuit of the capacitive touch screen sensor after the sensing channels are connected in series. Each channel can be equivalent to a resistor R, and after all the channels are connected in series, the resistance values of the two points of the first test point 15 of the sensing channel detection plate and the second test point 17 of the sensing channel detection plate are R' = R11+ R12+ R13+ R14+ R15+ R16.
Fig. 9 shows an equivalent circuit of the capacitive touch screen sensor after the sensing channels are connected in series. When an open circuit occurs in the channel or the outgoing line is open, the resistance value R' between the first test point 15 of the sensing channel detection plate and the second test point 17 of the sensing channel detection plate is measured and displayed as an open circuit state.
Fig. 10 shows an equivalent circuit of the capacitive touch screen sensor of the present invention after the driving channels are connected in series. When the channel is short-circuited or the outgoing line of the channel is short-circuited, the resistance value between the first test point 15 of the sensing channel detection plate and the second test point 17 of the sensing channel detection plate is measured to be R' = R11+ R13+ R14+ R15+ R16, and the resistance value is lower than a normal value, so that the short-circuit condition of the product can be judged.
When the resistance test is qualified, the tested sensing channel 24 (shown in fig. 2B, which includes the sensing channel body 19, the sensing channel binding PIN 20, the sensing channel outgoing line 22, the sensing channel body short-end outgoing line 26, and the sensing channel binding PIN short-end outgoing line 28) is separated along the inner edge of the sensing channel detection board detection frame 12 (i.e., the outer edge of the sensing channel detection product placement area 14), referring to fig. 1B, the sensing channel 24 is separated from contact with the sensing channel detection board 18, and the subsequent function of the sensing channel 24 is not affected.
Fig. 11 is a schematic structural diagram of a qualified driving channel 23 and sensing channel 24 in a two-in-one state. The device comprises a driving channel body 9, a driving channel binding PIN10, a driving channel outgoing line 21, a driving channel body short-end outgoing line 25, a driving channel binding PIN short-end outgoing line 27, a sensing channel body 19, a sensing channel binding PIN 20, a sensing channel outgoing line 22, a sensing channel body short-end outgoing line 26 and a sensing channel binding PIN short-end outgoing line 28.
The above-mentioned embodiments are described in more detail, but the invention is not to be construed as being limited to the scope of the invention. It should be noted that, for those skilled in the relevant art, various changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. The capacitive touch screen sensor circuit detection board is characterized by comprising a driving channel detection board (8) and a sensing channel detection board (18), wherein the driving channel detection board (8) is used for detecting a circuit of a driving channel (23), and the sensing channel detection board (18) is used for detecting a circuit of a sensing channel (24); the drive channel detection plate (8) comprises a drive channel detection plate supporting frame (1), a drive channel detection plate detection frame (2), a drive channel body end short-circuit line (3), a drive channel detection product placement area (4), a drive channel detection plate first test point (5), a drive channel binding PIN end short-circuit line (6) and a drive channel detection plate second test point (7), when the drive channel detection product placement area (4) is internally provided with a product to be detected, the drive channel body end short-circuit line (3) is connected with a drive channel body (9) of the product to be detected, the drive channel binding PIN end short-circuit line (6) is connected with a drive channel binding PIN (10) of the product to be detected, and the drive channel body (9) and the drive channel binding PIN (10) of the product to be detected are respectively used for driving the drive channel first test point (5) and the drive channel detection plate (8) to be detected The second test point (7) of the detection board is two end points, and the short-circuit line (3) at the end of the drive channel body, the short-circuit line (6) at the binding PIN end of the drive channel and the outgoing line (21) of the drive channel of the product to be detected are connected end to form a series circuit; the induction channel detection plate (18) comprises an induction channel detection plate supporting frame (11), an induction channel detection plate detection frame (12), an induction channel body end short-circuit line (13), an induction channel detection product placing area (14), an induction channel detection plate first test point (15), an induction channel binding PIN end short-circuit line (16) and an induction channel detection plate second test point (17), when the induction channel detection product placing area (14) is internally provided with a product to be detected, the induction channel body end short-circuit line (13) is connected with an induction channel body (19) of the product to be detected, the induction channel binding PIN end short-circuit line (16) is connected with the induction channel binding PIN (20) of the product to be detected, and the induction channel body (19) and the induction channel binding PIN (20) of the product to be detected are respectively connected with the induction channel first test point (15) and the induction channel detection plate (18) on the induction channel detection plate (18) The second test point (17) of the board is two end points, and the short-circuit line (13) at the end of the induction channel body, the short-circuit line (16) at the PIN end bound by the induction channel and the outgoing line (22) of the induction channel of the product to be detected are connected end to form a series circuit.
2. A capacitive touch screen sensor circuit sense board as claimed in claim 1, wherein the drive channel body end stub (3) on the drive channel sense board (8) and the drive channel body short end lead (25) on the drive channel (23) can be connected correspondingly, and the drive channel binding PIN end stub (6) and the drive channel binding PIN short end lead (27) can be connected correspondingly.
3. The capacitive touch screen sensor circuit board of claim 1, wherein the sense channel body short terminal (13) on the sense channel board (18) and the sense channel body short terminal lead (26) on the sense channel (24) are capable of corresponding connection, and the sense channel binding PIN terminal short terminal (16) and the sense channel binding PIN short terminal lead (28) are capable of corresponding connection.
4. A method of sensing a capacitive touch screen sensor circuit, the method comprising the steps of:
a. detection drive channel circuit
In the manufacturing process of the driving channel (23), a driving channel body end short-circuit wire (3) and a driving channel binding PIN end short-circuit wire (6) are respectively designed and manufactured at the positions, corresponding to the driving channel body short-end outgoing wire (25) and the driving channel binding PIN short-end outgoing wire (27), on the driving channel detection board supporting frame (1), and adjacent channels are connected end to form a series circuit;
leading out a first test point (5) of a drive channel detection plate and a second test point (7) of the drive channel detection plate from the head end and the tail end of the series circuit;
measuring the resistance value between the first test point (5) of the drive channel detection plate and the second test point (7) of the drive channel detection plate, and judging whether the product to be detected has an open circuit or a short circuit;
b. circuit for detecting induction channel
In the manufacturing process of the induction channel (24), a short-circuit line (13) at the end of the induction channel body and a short-circuit line (16) at the end of the induction channel bound PIN are designed and manufactured at the positions, corresponding to the short-end outgoing line (26) of the induction channel body and the short-end outgoing line (28) of the induction channel bound PIN, on a supporting frame (11) of the induction channel detection board, and adjacent channels are connected end to form a series circuit;
leading out a first test point (15) of a sensing channel detection plate and a second test point (17) of the sensing channel detection plate from the head end and the tail end of the series circuit;
and measuring the resistance value between the first test point (15) of the sensing channel detection plate and the second test point (17) of the sensing channel detection plate, and judging whether the product to be detected has an open circuit or a short circuit.
5. The method of claim 4, wherein when the resistance between the products to be tested is lower than the resistance of the qualified products, the products to be tested have a short circuit condition.
6. The method according to claim 4, wherein when no resistance value is displayed between the products to be tested, an open circuit condition exists in the products to be tested.
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| JUN-HYEOK YANG: "A Noise-Immune High-Speed Readout Circuit for In-Cell Touch Screen Panels", 《IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I: REGULAR PAPERS》 * |
| 张晋芳等: "自互一体式电容触摸屏检测电路设计", 《北京交通大学学报》 * |
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| CN112363083B (en) | 2022-04-29 |
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