TWI795971B - Detection device and detection method - Google Patents

Abstract

A detection device comprises a processing circuit and a driving circuit. The processing circuit comprises a detector and a calculator. The detector is configured to provide a detection signal, and the detector is configured to receive a feedback signal. The calculator is configured to calculate the position of the open circuit based on the feedback signal. The driving circuit is coupled to the processing circuit, and the driving circuit comprises at least one switching circuit. At least one switching circuit is configured for switching the circuit path of the data signal according to the position of the open circuit.

Description

Detection device and detection method

This case is related to a detection device and a detection method, and in particular to a disconnection detection device and a disconnection detection method applied to a display circuit.

Flexible displays have the characteristics of flexibility, bendability, light weight, and thin thickness. When a display or mobile phone adopts an ultra-narrow bezel design, a higher screen-to-body ratio means that the display or mobile phone screen will have a larger field of view and a high sense of immersion. However, the flexible circuit may cause internal circuit damage (crack) during the process of flexing (such as bending backwards), resulting in abnormal panel images. However, cracks may appear during the process or on the client side. Detected in advance through reliability testing.

This Summary is intended to provide a simplified summary of the disclosure in order to provide the reader with a basic understanding of the disclosure. This summary is not an extensive overview of the disclosure and it is not intended to identify key/critical elements of the embodiments or to delineate the scope of the disclosure.

One of the technical aspects of this case relates to a detection device. The detection device includes a processing circuit and a driving circuit. The processing circuit includes a detector and a calculator. The detector is used for providing a detection signal, and the detector is used for receiving a feedback signal. The calculator is used to calculate the position of the open circuit according to the feedback signal. The driving circuit is coupled to the processing circuit, and the driving circuit includes at least one switching circuit. At least one switching circuit is used for switching the circuit path of the data signal according to the position of the disconnection.

One of the technical aspects of this case relates to a detection method. This detection method includes: using a detector to provide a detection signal, and the detection signal passes through the driving circuit; using the detector to receive a feedback signal from the driving circuit; using a calculator to calculate the position of the open circuit according to the feedback signal ; and at least one switching circuit of the driving circuit is used to switch the circuit path of the data signal according to the position of the disconnection.

Therefore, according to the technical content of this case, the detection device and detection method shown in the embodiment of this case can calculate the position of the disconnection by providing the detection signal and receiving the feedback signal, which is suitable for the disconnection detection device of the display circuit. In addition, the detection device and detection method of the present application can switch the circuit path of the data signal according to the position of the disconnection, so the problem of abnormal picture of the display caused by the disconnection can be improved.

In order to make the description of the disclosure more detailed and complete, the following provides an illustrative description of the implementation and specific embodiments of the present case; but this is not the only form of implementing or using the specific embodiments of the present case. The description covers features of various embodiments as well as method steps and their sequences for constructing and operating those embodiments. However, other embodiments can also be used to achieve the same or equivalent functions and step sequences.

Unless otherwise defined in this specification, the meanings of scientific and technical terms used herein are the same as those understood and commonly used by those with ordinary knowledge in the technical field to which this case belongs. In addition, the singular nouns used in this specification include the plural forms of the nouns, and the plural nouns used also include the singular forms of the nouns, unless the context conflicts with the context.

In addition, regarding the "coupling" or "connection" used herein, it may refer to two or more elements being in direct physical or electrical contact with each other, or indirect physical or electrical contact with each other, or it may refer to two or more components. elements interact or act on each other.

In this article, the term "circuit" generally refers to an object that is connected in a certain way by one or more transistors and/or one or more active and passive components to process signals.

Certain terms are used in the specification and claims to refer to particular elements. However, those skilled in the art should understand that the same element may be called by different terms. The description and the scope of the patent application do not use the difference in the name as the way to distinguish the components, but the difference in the function of the components as the basis for the distinction. The term "comprising" mentioned in the specification and scope of patent application is an open term, so it should be interpreted as "including but not limited to".

FIG. 1 is a schematic diagram illustrating a detection device and a display panel according to an embodiment of the present application. As shown in the figure, the detection device 100 includes a processing circuit 110 and a driving circuit 120 , the processing circuit 110 includes a detector 111 and a calculator 113 , and the driving circuit 120 includes at least one switching circuit 121 . In terms of connections, the processing circuit 110 is coupled to the driving circuit 120 , the calculator 113 is coupled to the detector 111 , and the detector 111 is coupled to at least one switching circuit 121 .

In order to provide the technique of switching the circuit path of the data signal according to the position of the disconnection, the present application provides a detection device 100 as shown in FIG. 1 , and its related operations are described in detail as follows.

In one embodiment, the detector 111 is used to provide a detection signal, and the detector 111 is used to receive a feedback signal.

Subsequently, the calculator 113 is used to calculate the position of the disconnection according to the feedback signal. For example, if the length of the measuring wire is 0.3 m, the time of the feedback signal received by the calculator 113 is 1.494x10 ^-9 s, and the speed of the feedback signal received by the calculator 113 is 3x10 ⁸ m/s, then the time of the open circuit The position is (1.494x10 ^-9 x3x10 ⁸ )-0.3 = 0.1182m. In addition, the position of the open circuit is the starting point of the connector (pin) end of the flexible circuit board.

Next, at least one switching circuit 121 is used to switch the circuit path of the data signal according to the position of the disconnection. For example, at least one switch circuit 121 adjacent to the break position is turned on according to the break position, and the data signal is transmitted to the panel 900 through the at least one switch circuit 121 .

In order to make the above-mentioned operation of the detection device 100 easy to understand, please refer to Figures 2 to 5 together. Figure 2 is a detailed circuit diagram of a detection device according to an embodiment of the present case, and Figures 3 to 5 It is a schematic diagram of the operation of the detection device shown in Figure 2 according to an embodiment of the present case.

Please refer to FIG. 2 and FIG. 3 together. In one embodiment, in the first stage, the driving circuit 120 transmits data signals to the panel 900 .

Please refer to FIG. 4 , in one embodiment, in the second stage, the circuit path of the driving circuit 120 is disconnected, and the detection signal returns a feedback signal to the processing circuit 110 and at least one switching circuit 121 at the disconnected position.

Please refer to FIG. 5 , in one embodiment, in the third stage, at least one switching circuit 121 receives a feedback signal to turn on, and at least one switching circuit 121 transmits the data signal to the panel 900 .

In one embodiment, the processing circuit 110 further includes a timing controller 115 and a data signal source 117 . In terms of connection, the data signal source 117 is coupled to the timing controller 115 .

The timing controller 115 is used for providing complex timing signals. Next, the data signal source 117 provides the data signal according to the complex timing signal.

In one embodiment, the driving circuit 120 further includes at least one amplification circuit 123 . At least one amplifying circuit 123 is used for receiving and amplifying the feedback signal.

FIG. 6 is a schematic diagram illustrating a detection device and a display panel according to an embodiment of the present application. FIG. 7 is a detailed circuit diagram of a detection device according to an embodiment of the present application. Please refer to FIG. 6 and FIG. 7 together. Compared with the detection device 100 shown in FIG. 1, the power supply circuit 130A of the detection device 100A in FIG. 6 and FIG. The at least one switching circuit 121A of the testing device 100A further includes a repairing element 125A. In terms of connection, the restoration power supply 133A is coupled to at least one switching circuit 121A.

In one embodiment, the restoration power supply 133A is used to provide restoration signals. Subsequently, the repairing element 125A is used to receive a repairing signal to repair the driving circuit 120A. For example, the repairing element 125A can be made of a high-resistance material, and the high-resistance material can be a titanium alloy (such as Ti/Al/Ti) or a molybdenum alloy (such as Mo/Al/Mo), but the present invention is not limited thereto.

In order to make the above-mentioned operation of the detection device 100A easy to understand, please refer to Fig. 7 to Fig. 10 together. Fig. 8 to Fig. 10 show the detection device shown in Fig. 7 according to an embodiment of the present case operation diagram.

Please refer to FIG. 7 and FIG. 8 together. In one embodiment, in the first stage, the driving circuit 120A transmits data signals to the panel 900A.

Please refer to FIG. 9 , in one embodiment, in the second stage, the circuit path of the driving circuit 120A is disconnected, and the detection signal returns a feedback signal to the processing circuit 110A and at least one switching circuit 121A at the disconnected position.

Please refer to FIG. 10. In one embodiment, in the third stage, at least one switch circuit 121A receives a feedback signal to turn on, and at least one switch circuit 121A transmits a repair signal to the broken circuit for repair, so that the drive circuit 120A can be The data signal is transmitted to the panel 900A through its circuit path.

In one embodiment, the processing circuit 110A further includes a gamma signal source 119A. In terms of connection, the gamma signal source 119A is coupled to the timing controller 115A. The gamma signal source 119A is used to provide a gamma signal.

FIG. 11 is a cross-sectional view illustrating a driving circuit structure of a detection device according to an embodiment of the present application. FIG. 12 is a cross-sectional view illustrating a driving circuit structure of a detection device according to an embodiment of the present application.

Please refer to FIG. 11 and FIG. 12, the drive circuit 200 further includes a first insulating layer (such as 210, 210A), a second insulating layer (such as 220, 220A), a third insulating layer (such as 230, 230A), a first Metal layers (such as 240, 240A), repairing materials (such as 250, 250A), repairing circuit traces (such as 260, 260A) and fourth insulating layers (such as 270, 270A). In terms of connection, the second insulating layer (such as 220, 220A) is stacked above the first insulating layer (such as 210, 210A), and the third insulating layer (such as 230, 230A) is stacked on the first insulating layer (such as 210, 210A). 210A) and adjacent to the second insulating layer (such as 220, 220A), the first metal layer (such as 240, 240A) is stacked on the second insulating layer (such as 220, 220A), and the repair material (such as 250, 250A) stacked on both sides and/or above the first metal layer (such as 240, 240A), and the repair circuit traces (such as 260, 260A) are adjacent to the repair material (such as 250, 250A) or stacked on the repair material (such as 250 , 250A), the fourth insulation layer (for example 270 , 270A) is stacked above the repair circuit traces (for example 260 , 260A) and is stacked on the uppermost layer inside the driving circuit 200 .

In one embodiment, the first metal layer (eg 240 , 240A) is used for transmitting data signals. For example, the first insulating layer (such as 210, 210A) may be polyimide (Polyimide, PI), and the second insulating layer (such as 220, 220A) may be an organic buffer passivation layer (Organic buffer passivation, OBP), The material of the organic buffer passivation layer can be a photoresist material, the third insulating layer (such as 230, 230A) can be a buffer layer (Buffer layer, BL), and the material of the buffer layer can be silicon nitride (SiNx) or silicon oxide (SiOx ), the first metal layer (such as 240, 240A) can be a metal layer (Metal layer 2, M2), the material of the metal layer can be titanium alloy (Ti/Al/Ti), and the fourth insulating layer (such as 270, 270A) can be It is an organic buffer passivation layer (Organic buffer passivation, OBP), and the material of the organic buffer passivation layer may be a photoresist material.

Please refer to FIGS. 10 to 12 together. In one embodiment, the repairing element 125A is used to receive a repairing signal to repair the driving circuit 120A. For example, the repairing element 125A is used to receive the repairing signal to generate thermal energy to melt the repairing material (eg 250 , 250A), and the melted repairing material (eg 250 , 250A) is used to repair the disconnection or defect on the driving circuit 120A.

FIG. 13 is a top view illustrating a driving circuit structure of a detection device according to an embodiment of the present application. As shown in the figure, the structural appearance of the driving circuit 200 presents a serpentine shape.

Please refer to FIG. 11 and FIG. 13 together. In one embodiment, FIG. 13 is a top view of the driving circuit 200 shown in FIG. An insulation layer 210 , a second insulation layer 220 , a third insulation layer 230 , a first metal layer 240 , a repair material 250 , a repair circuit trace 260 and a fourth insulation layer 270 . For example, the structural appearance of the driving circuit 200 can be serpentine or straight, but the serpentine appearance design can bear more stress and avoid excessive disconnection, and the repair material 250 is arranged at the bend with greater stress. , so that it can be repaired immediately when the circuit breaks at the bend.

Please refer to FIG. 12 and FIG. 13 together. In one embodiment, FIG. 13 is a top view of the driving circuit 200A in FIG. An insulation layer 210A, a second insulation layer 220A, a third insulation layer 230A, a first metal layer 240A, a repair material 250A, a repair circuit trace 260A and a fourth insulation layer 270A.

FIG. 14 is a flowchart illustrating a detection method according to an embodiment of the present invention. The detection method 300 includes the following steps:

Step 310: using the detector 111 to provide a detection signal, and the detection signal passes through the driving circuit 120;

Step 320: Receive a feedback signal from the driving circuit 120 through the detector 111;

Step 330: use the calculator 113 to calculate the position of the open circuit according to the feedback signal;

Step 340 : Use at least one switch circuit 121 of the driving circuit 120 to switch the circuit path of the data signal according to the position of the disconnection.

To make the detection method 300 easy to understand, please refer to FIG. 1 and FIG. 14 together. In step 310 , a detection signal may be provided by the detector 111 , and the detection signal passes through the driving circuit 120 .

Then, in step 320 , the detector 111 may receive a feedback signal from the driving circuit 120 .

Next, in step 330 , the position of the open circuit can be calculated according to the feedback signal by the calculator 113 .

Then, in step 340 , at least one switching circuit 121 of the driving circuit 120 can be used to switch the circuit path of the data signal according to the position of the disconnection.

FIG. 15 is a flowchart illustrating a detection method according to an embodiment of the present case. In order to make the detection method 300A in FIG. 15 easy to understand, please refer to FIG. 2 and FIG. 15 together. The detection method 300A in FIG. 15 includes the following steps:

Step 310A: using the detector 111 to provide a detection signal, and the detection signal passes through the driving circuit 120;

Step 320A: Detect whether there is a feedback signal;

Step 330A: use the calculator 113 to calculate the position of the open circuit according to the feedback signal;

Step 340A: switch the circuit path of the data signal according to the position of the disconnection by using at least one switching circuit 121 of the driving circuit;

Step 350A: judging whether bright and dark lines are obvious;

Step 360A: Panel 900 is bad;

Step 370A: Panel 900 approves.

In one embodiment, the difference between the detection method 300A in FIG. 15 and the detection method 300 in FIG. 14 lies in the determination process of step 320A of the detection method 300A. In step 320 , whether there is a feedback signal can be detected by the detector 111 . When a feedback signal is detected by the detector 111 , step 330A is executed to calculate the position of the open circuit by the calculator 113 according to the feedback signal.

In one embodiment, when no feedback signal is detected by the detector 111 , step 370A is executed to determine that the panel 900 is permitted. For example, when the detector 111 detects that there is no feedback signal, that is, the driving circuit 120 is not disconnected, so it is determined that the panel 900 is permitted.

In one embodiment, please refer to step 350A to further determine whether the plurality of bright and dark lines on the panel 900 are obvious, and the above bright and dark lines are caused by an internal disconnection of the driving circuit 120 . For example, it can be judged through human eyes or sensors whether the plurality of bright and dark lines on the panel 900 caused by the internal disconnection of the driving circuit 120 are obvious.

In one embodiment, please refer to step 350A and step 360A together. When the driving circuit 120 is disconnected, it is determined that the multiple bright and dark lines of the panel 900 are obvious, and when the multiple bright and dark lines of the panel 900 are obvious, it is determined that the panel 900 is not. good.

In one embodiment, please refer to step 350A and step 370A together. When the driving circuit 120 repairs the broken circuit or switches the circuit path of the data signal through at least one switching circuit 121, it is determined that the plurality of bright and dark lines on the panel 900 are not obvious, and When the multiple bright and dark lines of the panel 900 are not obvious, it is determined that the panel 900 is permitted.

FIG. 16 is a flowchart illustrating a detection method according to an embodiment of the present invention. Compared with the detection method 300A shown in FIG. 15 , the detection method 300B in FIG. 16 has a step of repairing the driving circuit 120 . In order to make the detection method 300B in FIG. 16 easy to understand, please refer to FIG. 7 and FIG. 16 together. The detection method 300B in FIG. 16 includes the following steps:

Step 310B: using the detector 111A to provide a detection signal, and the detection signal passes through the driving circuit 120A;

Step 320B: Detect whether there is a feedback signal;

Step 330B: use the calculator 113A to calculate the position of the open circuit according to the feedback signal;

Step 340B: Use at least one switching circuit 121A of the driving circuit 120A to switch the repairing circuit path of the repairing signal according to the position of the disconnection, and use the repairing element 125A to receive the repairing signal to repair the driving circuit 120A;

Step 350B: judging whether the times of repairing the driving circuit 120A by the repairing element 125A are less than 3 times;

Step 360B: Panel 900A is bad;

Step 370B: Panel 900A approves.

In one embodiment, referring to step 350B, it may be further determined whether the number of times of repairing the driving circuit 120A by repairing components is less than 3 times. For example, it can be judged by a person or a computer whether the number of repairs to the driving circuit 120A by the repairing element 125A is less than 3 times.

In one embodiment, please refer to step 360B, when the number of times the repairing element 125A repairs the driving circuit 120A is greater than 3 times, it is determined that the panel 900A is not good.

In one embodiment, when the repairing component 125A repairs the driving circuit 120 for less than 3 times, step 320B is executed again to detect whether there is a feedback signal, and if there is no feedback signal, step 370B may be executed to determine that the panel 900A is permitted.

As can be seen from the implementation manner of the present case described above, the application of the present case has the following advantages. The detection device and detection method shown in the embodiment of this case can switch the circuit path of the data signal according to the position of the disconnection, so the problem of abnormal picture of the display caused by the disconnection can be improved.

Although the specific examples of this case are disclosed in the above implementation mode, they are not used to limit this case. Those who have ordinary knowledge in the technical field of this case can carry out this case without departing from the principle and spirit of this case. Various changes and modifications, so the protection scope of this case should be defined by the scope of the accompanying patent application.

100, 100A: detection device

110, 110A: processing circuit

111, 111A: detector

113, 113A: Calculator

115, 115A: timing controller

117, 117A: data signal source

119, 119A: Gamma signal source

120, 120A, 200, 200A: drive circuit

121, 121A: at least one switching circuit

123, 123A: at least one amplifier circuit

125A: Restoration Components

130, 130A: power circuit

131, 131A: drive power supply

133A: Repair power supply

210, 210A: first insulating layer

220, 220A: second insulating layer

230, 230A: the third insulating layer

240, 240A: first metal layer

250, 250A: repair material

260, 260A: repair circuit wiring

270, 270A: the fourth insulating layer

400, 400A: detection method

900, 900A: panel

In order to make the above and other purposes, features, advantages and embodiments of this case more obvious and understandable, the accompanying drawings are explained as follows: FIG. 1 is a schematic diagram illustrating a detection device and a display panel according to an embodiment of the present application. FIG. 2 is a detailed circuit diagram of a detection device according to an embodiment of the present application. Figures 3 to 5 are schematic diagrams illustrating the operation of the detection device shown in Figure 2 according to an embodiment of the present application. FIG. 6 is a schematic diagram illustrating a detection device and a display panel according to an embodiment of the present application. FIG. 7 is a detailed circuit diagram of a detection device according to an embodiment of the present application. Figures 8 to 10 are schematic diagrams illustrating the operation of the detection device shown in Figure 7 according to an embodiment of the present case. FIG. 11 is a cross-sectional view illustrating a driving circuit structure of a detection device according to an embodiment of the present application. FIG. 12 is a cross-sectional view illustrating a driving circuit structure of a detection device according to an embodiment of the present application. FIG. 13 is a top view illustrating a driving circuit structure of a detection device according to an embodiment of the present application. FIG. 14 is a flowchart illustrating a detection method according to an embodiment of the present invention. FIG. 15 is a flowchart illustrating a detection method according to an embodiment of the present case. FIG. 16 is a flowchart illustrating a detection method according to an embodiment of the present invention.

Domestic deposit information (please note in order of depositor, date, and number) none Overseas storage information (please note in order of storage country, institution, date, and number) none

100: detection device

110: processing circuit

111: Detector

113: Calculator

115: Timing controller

117: Data signal source

119: Gamma signal source

120: drive circuit

121: at least one switching circuit

123: At least one amplifier circuit

130: Power circuit

131: Drive power

900: panel

Claims (19)

A detection device, comprising: a processing circuit, comprising: a detector, used to provide a detection signal, and the detector is used to receive a feedback signal; and a calculator, used to calculate a a position of the disconnection; and a driving circuit coupled to the processing circuit, comprising: at least one switching circuit for switching a circuit path of a data signal according to the position of the disconnection. The detecting device as claimed in claim 1, wherein in a first stage, the driving circuit transmits the data signal to a panel. The detection device as described in claim 2, wherein in a second stage, the circuit path of the driving circuit has the disconnection, and the detection signal returns the feedback signal to the processing circuit and the circuit path at the position of the disconnection. The at least one switching circuit. The detection device according to claim 3, wherein in a third stage, the at least one switching circuit receives the feedback signal to be turned on, and the at least one switching circuit transmits the data signal to the panel. The detection device as described in claim 1, wherein the processing circuit The circuit further includes: a timing controller for providing complex timing signals; and a data signal source coupled to the timing controller and providing the data signal according to the timing signals; wherein the driving circuit further includes: at least An amplifying circuit is used for receiving and amplifying the feedback signal. The detection device as described in claim 5 further includes: a power supply circuit, including: a driving power supply coupled to a panel for providing a panel power supply. The detection device as described in claim 6, wherein the power supply circuit further includes: a repair power supply coupled to the at least one switching circuit to provide a repair signal; wherein the at least one switching circuit includes: a repair element, It is used for receiving the repair signal to repair the drive circuit. The detection device as claimed in claim 7, wherein in a first stage, the driving circuit transmits the data signal to the panel. The detection device as described in claim 8, wherein in a second stage, the circuit path of the driving circuit has the disconnection, and the detection signal returns the feedback signal to the processing circuit and the circuit path at the position of the disconnection. The to One less switching circuit. The detection device as described in claim 9, wherein in a third stage, the at least one switch circuit receives the feedback signal to turn on, and the at least one switch circuit transmits the repair signal to the open circuit to be repaired, so that The circuit path of the driving circuit transmits the data signal to the panel. The detection device as described in claim 5, wherein the processing circuit further includes: a gamma signal source coupled to the timing controller for providing a gamma signal. The detection device as described in claim 7, wherein the driving circuit further comprises: a first insulating layer; a second insulating layer stacked on the first insulating layer; a third insulating layer stacked on the first insulating layer An insulating layer above and adjacent to the second insulating layer; a first metal layer stacked above the second insulating layer and used to transmit the data signal; a repair material stacked on the first metal layer on both sides and/or above; a repair circuit trace, adjacent to the repair material or stacked on the repair material; and a fourth insulating layer, stacked on the repair circuit trace and stacked on The topmost layer inside the drive circuit. A detection method, comprising: using a detector to provide a detection signal, and the detection signal passes through a driving circuit; using the detector to receive a feedback signal from the driving circuit; using a calculation A device is used to calculate a position of an open circuit according to the feedback signal; and a circuit path of a data signal is switched according to the position of the open circuit by at least one switching circuit of the driving circuit. The detection method as described in claim 13 further includes: judging whether the plurality of bright and dark lines on a panel caused by the open circuit inside the driving circuit are obvious. The detection method as described in claim 14 further includes: when the drive circuit has the open circuit, then determining that the bright and dark lines of the panel are obvious; and when the drive circuit repairs the open circuit or through the at least one switching circuit When the circuit path of the data signal is switched, it is determined that the bright and dark lines of the panel are not obvious. The detection method as described in claim 15 further includes: when the bright and dark lines of the panel are obvious, it is determined that the panel is not good; And when the bright and dark lines of the panel are not obvious, it is determined that the panel is permitted. The detection method as described in claim 13, wherein the step of switching the circuit path of the data signal according to the position of the disconnection through the at least one switching circuit of the driving circuit includes: using the at least one switching circuit of the driving circuit At least one switching circuit is used to switch a repairing circuit path of a repairing signal according to the position of the disconnection, and a repairing element is used to receive the repairing signal to repair the driving circuit. The detection method as described in Claim 17 further includes: judging whether the number of times the drive circuit is repaired by the repairing element is less than 3 times. The detection method as described in claim 18 further includes: when the number of times that the repairing element repairs the driving circuit is greater than 3 times, it is determined that a panel is not good; when the number of times that the repairing element repairs the driving circuit is less than 3 times , then detect whether there is the feedback signal; and when the feedback signal is not detected, then determine that the panel is permitted.

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