CN117475800A - Detection system and display device - Google Patents
Detection system and display device Download PDFInfo
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- CN117475800A CN117475800A CN202310851037.4A CN202310851037A CN117475800A CN 117475800 A CN117475800 A CN 117475800A CN 202310851037 A CN202310851037 A CN 202310851037A CN 117475800 A CN117475800 A CN 117475800A
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- 238000001514 detection method Methods 0.000 title claims abstract description 93
- 238000004891 communication Methods 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 229920001621 AMOLED Polymers 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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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
- 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
- G01R31/58—Testing of lines, cables or conductors
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
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Abstract
The embodiment of the application provides a detection system and a display device. The detection system comprises a main control module and a controlled module electrically connected with the main control module, wherein the two modules are electrically connected through a connecting unit, and the main control module comprises a controller, a waveform driving unit, a connecting unit, a waveform detection unit and a judging unit. The controller is used for providing detection signals for the waveform driving unit, the connecting unit transmits signals in the waveform driving unit to the waveform detecting unit, the judging unit judges the communication condition in the connecting unit according to the output signals of the waveform detecting unit, when the signal waveforms at the output end of the judging unit and the signal waveforms at the output end of the controller synchronously change, the connecting unit has good conductivity, the connecting effect between the main control module and the controlled module is good, and the product has higher quality and stability.
Description
Technical Field
The present invention relates to the field of circuit detection technologies of display panels, and in particular, to a detection system and a display device.
Background
With the continuous development of driving and controlling technologies, higher requirements are being put on the performance and quality of display panels and display devices.
When the display panel and the display device work normally, the driving and controlling modes of the display panel and the display device directly influence the working effect and the comprehensive performance of the display device. Meanwhile, with further expansion of application fields of the organic light emitting display device, how to further improve a driving system and working stability of the organic light emitting display device is also becoming more and more important. When the display device prepared in the prior art works, because different devices need to be communicated, for example, in display systems and devices based on time sequence controllers (i.e. TCON) such as AMOLED, micro-LED, LCD and Mini-LED, a main Control Board (e.g. Control Board) and a controlled Board (e.g. X-Board) of the display device need to be electrically connected by using a cable. In the process of adopting cable connection, along with the long-time use of the panel, the panel is influenced by external vibration, installation, assembly and other factors in the use process, the cable connection between the main control board and the controlled board and the situation of loose or even short circuit at the connection end are easy to occur, and further the problem of poor connection and other unsatisfactory connection effects between two different modules is caused, and when the connection is poor, the transmission of various control signals is hindered, the stability and quality of the operation of a display system and a device are difficult to ensure, the comprehensive performance of the display device is reduced, and the poor connection condition is required to be detected to find out bad products.
In summary, in the display panel and the device manufactured in the prior art, when two different modules are electrically connected through a cable, there is often a problem of poor connection such as poor connection.
Disclosure of Invention
The embodiment of the invention provides a detection system and a display device, which are used for effectively detecting connectivity of connecting cables between different modules in the display device, so as to find out bad internal connection products and improve the yield of the products.
To solve the above technical problem, a first aspect of an embodiment of the present invention provides a detection system, including:
the system comprises a main control module and a controlled module electrically connected with the main control module, wherein the main control module comprises a circuit detection circuit, and the circuit detection circuit is used for detecting the communication between the main control module and the controlled module, and the main control module comprises:
a controller to provide a detection signal to the waveform driving unit;
a waveform driving unit that receives the detection signal;
the connecting unit is used for connecting the main control module and the controlled module and receiving the output signal of the waveform driving unit;
the waveform detection unit is electrically connected with the connection unit and is used for receiving an output signal of the connection unit; the method comprises the steps of,
and one end of the judging unit is electrically connected with the waveform detecting unit, and the other end of the judging unit is electrically connected with the controller.
According to an embodiment of the present invention, the connection unit includes a plurality of connection wires, one end of each connection wire is electrically connected to a first connection terminal on the main control module, and the other end of each connection wire is electrically connected to a plurality of second connection terminals on the controlled module.
According to an embodiment of the present invention, the waveform driving unit includes:
a first transistor, wherein a first port of the first transistor is electrically connected with the VCC end and one end of a first resistor;
the other end of the first resistor is electrically connected with the second port of the first transistor and one end of the second resistor;
the other end of the second resistor is electrically connected with the first port of the second transistor;
a second transistor, wherein a second port of the second transistor is electrically connected with one end of the third resistor;
the other end of the third resistor is electrically connected with the output end of the controller;
and one end of the seventh resistor is electrically connected with the third port of the first transistor and the output end of the waveform driving unit, and the other end of the seventh resistor is grounded.
According to an embodiment of the invention, the first transistor is provided as a PNP transistor and the second transistor is provided as an NPN transistor.
According to an embodiment of the present invention, when the voltage across the second transistor is greater than or equal to 0.6V, the second transistor is turned on.
According to an embodiment of the present invention, the main control module further includes:
one end of the first capacitor is electrically connected with one end of the connecting unit, and the other end of the first capacitor is electrically connected with one ends of the first diode and the second diode;
the other end of the first diode is electrically connected with one end of the second capacitor, one end of the fourth resistor and the output end of the waveform detection unit;
the other end of the second diode is grounded; the method comprises the steps of,
the other end of the second capacitor is electrically connected with the other end of the fourth resistor;
and one end of the fourth resistor is electrically connected with the output end of the waveform detection unit, one end of the second capacitor and the other end of the first transistor.
According to an embodiment of the present invention, when the waveform signal exists at the input end of the connection unit, the voltage at the output end of the waveform detection unit is greater than 0.
According to an embodiment of the present invention, the judging unit further includes:
the first end of the comparator is electrically connected with the output end of the judging unit, the second end of the comparator is electrically connected with the other end of the fifth resistor and one end of the sixth resistor, the third end of the comparator is electrically connected with the output end of the waveform detecting unit, the fourth end of the comparator is grounded, and the fifth end of the comparator is electrically connected with the VCC end;
one end of the fifth resistor is electrically connected with the VCC end; the method comprises the steps of,
and the other end of the sixth resistor is grounded.
According to an embodiment of the present invention, a waveform of the output signal corresponding to the other end of the judging unit changes in synchronization with a waveform of the inspection signal output by the controller.
According to a second aspect of the embodiment of the present invention, there is further provided a display device, a display system and a display panel electrically connected to the display system, where the display system is configured to provide a control signal to the display panel;
the driving system is a detection system provided in the embodiment of the application.
The embodiment of the invention has the beneficial effects that: compared with the prior art, the embodiment of the application provides a detection system and a display device. The detection system comprises a main control module and a controlled module electrically connected with the main control module, wherein the two modules are electrically connected through a connecting unit, and the main control module comprises a controller, a waveform driving unit, a connecting unit, a waveform detection unit and a judging unit. The controller is used for providing detection signals for the waveform driving unit, the connecting unit transmits signals in the waveform driving unit to the waveform detecting unit, the judging unit judges the communication condition in the connecting unit according to the output signals of the waveform detecting unit, when the signal waveforms at the output end of the judging unit and the signal waveforms at the output end of the controller synchronously change, the connecting unit has good conductivity, the connecting effect between the main control module and the controlled module is good, and the product has higher quality and stability.
Drawings
In order to more clearly illustrate the embodiments or the technical solutions in the prior art, the following description will briefly introduce the drawings that are required to be used in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present application;
FIG. 2 is a simplified schematic diagram of a detection system provided in an embodiment of the present application;
FIG. 3 is a specific circuit structure of the detecting device provided in the embodiment of the present application;
fig. 4 is a timing chart corresponding to the connection unit in the second state in the embodiment of the present application;
fig. 5 is a timing chart corresponding to the connection unit in the first state in the embodiment of the present application.
Detailed Description
In the following detailed description, certain embodiments of the invention are shown and described, simply by way of illustration. As will be appreciated by those skilled in the art, the embodiments described herein may be modified in numerous ways without departing from the spirit or scope of the present invention.
In the drawings, the thickness of layers, films, plates, regions, etc. may be exaggerated for clarity and for better understanding and ease of description. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present.
In addition, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises" or "comprising" will be understood to imply the inclusion of stated elements but not the exclusion of other elements. Further, in the specification, the word "on … …" means placed above or below the object portion, and not necessarily placed on the upper side of the object portion based on the direction of gravity.
It will be understood that, although the terms "first," "second," etc. may be used herein to describe various components, these components should not be limited by these terms. These components are only used to distinguish one component from another.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features or components, but do not preclude the presence or addition of one or more other features or components.
It will be understood that when a layer, region or element is referred to as being "formed on" another layer, region or element, it can be directly or indirectly formed on the other layer, region or element. For example, intervening layers, regions, or components may be present.
In the following examples, the x-axis, y-axis, and z-axis are not limited to three axes of a rectangular coordinate system, and may be interpreted in a broader sense. For example, the x-axis, y-axis, and z-axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other.
The embodiment of the application provides a detection system and a display device, the detection system is arranged in the main control module, the communication effect of a connecting unit is detected through different circuit units in the detection system, the detection method is simple, the detection precision is high, and the yield and the comprehensive performance of a device can be improved.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present application. In the case of providing the display device, an AMOLED display device will be described as an example. The display device includes a display area 100 and a non-display area 101 provided on one side of the display area 100. Meanwhile, the display device further includes a display panel 102, a source driving integrated circuit 103, a gate driving integrated circuit, an X Board 108 (X Board), and a control circuit Board 104. Specifically, in the case of providing the source driver ics 103 and the gate driver ics, a plurality of source driver ics 103 may be provided correspondingly, for example, the source driver ics 103 are provided at the upper and lower frame positions of the display area 100, and the source driver ics 103 are connected to the control circuit board 104 through the X-plate. And gate driving ics are disposed at the left and right frame regions of the display region 100. Only the source driving integrated circuit 103 provided in the non-display region 101 at the bottom of the display region 100 is illustrated in fig. 1.
Meanwhile, in the display area 100, a plurality of data signal lines and scan signal lines, and corresponding pixel structures 105 are arranged in an array in the row and column directions of the panel. When the pixel structure and the corresponding different signal lines are set, the pixel structure and the corresponding different signal lines may be set according to a conventional structure, which is not described herein.
Meanwhile, a main control module 200 is further disposed in the non-display area, and the main control module 200 is electrically connected with the X-board 108 through the connector 111, and realizes transmission of control signals. However, how to test the quality of the circuit connected to the connector 111 during the use of the panel will affect the yield and the overall performance of the product.
Specifically, as shown in fig. 2, fig. 2 is a simplified schematic diagram of a detection system according to an embodiment of the present application. In connection with the structure of the apparatus in fig. 1, the detection system includes a main control module 200, a controlled module 201, and a connection unit 303. One end of the connection unit 303 is electrically connected to the main control module 200, and the other end of the connection unit 303 is electrically connected to the controlled module 201. Specifically, the connection unit 303 corresponds to the connector 111 of the device in fig. 1, and the controlled module 201 corresponds to the X-plate of the device in fig. 1. Thereby electrically connecting the two modules through the connection unit 303 and realizing the transmission of control signals.
Further, the main control module 200 further includes a circuit detection circuit, and when the circuit is connected through the connection unit 303, the connection or the poor touch control problem will occur at the two ends of the connection unit, so that the problem of poor connection is caused. According to the embodiment of the application, the line detection circuit is arranged to detect the communication condition between the main control module and the controlled module, so that the yield of products is effectively improved.
The line detection circuit includes a controller 301, a waveform driving unit 302, a connection unit 303, a waveform detection unit 304, and a determination unit 305. Specifically, the controller 301 is electrically connected to the waveform driving unit 302 and is configured to provide a detection signal to the waveform driving unit 302, and meanwhile, the waveform driving unit 302 is electrically connected to one end of the connection unit 303, and the waveform driving unit 302 receives the detection signal (CHECK) output by the controller 301, processes the detection signal, and then transmits the detection signal to the connection unit 303 and continues to transmit through the connection unit 303. In this embodiment, the connection unit 303 includes a plurality of connection wires, one end of each connection wire is electrically connected to a first connection terminal on the main control module, and the other end of each connection wire is electrically connected to a plurality of second connection terminals on the controlled module.
When the connection unit 303 is well connected, the output signal of the waveform driving unit 302 may be directly transmitted to the waveform detecting unit 304 through the connection unit 303, so that the waveform detecting unit 304 receives the output signal of the connection unit 303, and after the waveform detecting unit 304 processes the output signal, the output signal of the waveform detecting unit 304 is continuously transmitted to the judging unit through the connection relationship, and finally is transmitted to the controller 301, thereby forming a complete loop. According to the signal waveform of the output end of the controller 301, and by combining the signal waveform input into the controller 301 by the judging unit 305, the judgment and detection of the connection condition of the connecting unit 303 are realized.
Alternatively, when the signal waveform at the output end of the controller 301 and the signal waveform input into the controller 301 by the judging unit 305 have a synchronous change relationship, the whole circuit is complete, and the device is good.
Specifically, as shown in fig. 3, fig. 3 is a specific circuit structure of the detection device provided in the embodiment of the present application. In combination with the structure in fig. 2, in the embodiment of the present application, when the detection circuit in the main control module is provided, the waveform driving unit 302 includes a first transistor Q1, a first resistor R1, a second resistor R2, a second transistor Q2, a third resistor R3, and a seventh resistor R7.
The first port of the first transistor Q1 is electrically connected to the VCC terminal and one end of the first resistor R1, the second port is electrically connected to the other end of the first resistor R1 and one end of the second resistor R2, and the third port of the first transistor Q1 is electrically connected to one end of the seventh resistor R7 and the output terminal of the waveform driving unit 302. The output terminal of the waveform driving unit 302 is electrically connected to the clk_out signal terminal.
Meanwhile, the other end of the second resistor R2 is electrically connected to the first port of the second transistor, the second port of the second transistor Q2 is electrically connected to one end of the third resistor R3, and the third port of the second transistor Q2 is grounded. And the other end of the third resistor R3 is electrically connected to the output end of the controller, for example, the third resistor R3 is electrically connected to the output detection CHECK signal line of the controller.
Further, one end of the seventh resistor R7 is electrically connected to the third port of the first transistor Q1 and the output end of the waveform driving unit, and the other end of the seventh resistor R7 is grounded. In the embodiment of the present application, the first transistor Q1 is configured as a PNP transistor, and the second transistor Q2 is configured as an NPN transistor. In detail, in fig. 3, in the first transistor Q1, the first port is e, the second port is b, and the third port is c, and in the second transistor Q2, the first port is c, the second port is b, and the third port is e.
Further, in connecting the waveform driving unit 302 and the connecting unit 303, the connecting unit 303 is described by taking an FFC connector in a display panel as an example. A connection line is provided on the upper and lower outermost sides of the connection unit 303. A detection output line 401 is provided, as at the upper edge of the connection unit 303, electrically connected to the output terminal of the waveform driving unit 302, and a detection input line 402 is provided at the lower edge of the connection unit 303. The detection output line 401 is connected to the detection input line 402, and the detection output line 401 receives the output signal of the waveform driving unit 302, and the detection input line 402 provides the detection input signal to the waveform detecting unit.
In this embodiment, the output signal of the waveform driving unit 302 passes through the detection input line 402 and the detection input line 402 to realize signal transmission, and further processes the transmitted signal. In this embodiment, the detection output line 401 and the detection input line 402 may be wires at the outermost edges of two sides of the connector. Because the connector is in use, the place where the problem occurs is usually the outermost area, and the outermost area is in use, the problems of poor plugging and communication failure can occur. In the embodiment of the application, the connection condition of the outermost routing is detected to judge the overall conductivity.
Further, in the embodiment of the present application, the waveform detecting unit 304 includes a first capacitor C1, a first diode D1, a second diode D2, a second capacitor C2, and a fourth resistor R4. One end of the first capacitor C1 is electrically connected to one end of the connection unit 303, for example, electrically connected to the detection input line 402 of the connection unit 303, and receives the input signal transmitted by the detection input line. The other end of the first capacitor C1 is electrically connected to one end of the first diode D1 and one end of the second diode D2. The other end of the first capacitor C1 is electrically connected to the a end of the first diode D1 and the K end of the second diode D2.
Meanwhile, the other end of the second diode D2 is grounded, i.e., the a end of the second diode D2 is grounded. The other end K of the first diode D1 is electrically connected to one end of the second capacitor C2, one end of the fourth resistor R4, and the input end of the determining unit 305, and the other end of the second capacitor C2 is electrically connected to the other end of the fourth resistor R4 and grounded. In this embodiment, the sizes of the capacitors of the first capacitor C1 and the second capacitor C2 may be determined according to products of different models, which is not described herein. And whether the cable line in the connection unit is disconnected or not is judged by combining the characteristics of the first capacitor C1 and the second capacitor C2 for blocking the direct-current alternating-current signal through different diodes, so that the detection effect is improved.
Further, in the judging unit 305 of the main control module 200, it further includes a comparator U1A, a fifth resistor R5 and a sixth resistor R6.
Specifically, the first end of the comparator U1A is electrically connected to the output end of the judging unit 305, for example, to the LINK signal line of the output signal line LINK of the judging unit 305, so as to provide the LINK signal to the master controller. Meanwhile, the second end of the comparator U1A is electrically connected to the other end of the fifth resistor R5 and one end of the sixth resistor R6, the third end of the comparator U1A is electrically connected to the output end of the waveform detecting unit 304, the fourth end of the comparator U1A is grounded, and the fifth end of the comparator U1A is electrically connected to the VCC end.
Further, the sixth resistor R6 is grounded, and one end of the fifth resistor R5 is electrically connected to the VCC terminal. Thereby realizing the setting of the detection circuit in the whole detection system. In this embodiment, the connectivity of the device is determined by determining whether the waveform of the output signal LINK corresponding to the output terminal of the determining unit 305 and the waveform of the detection signal CHECK of the output terminal of the control region synchronously change.
Fig. 4 and fig. 5 are timing diagrams corresponding to the connection unit in the first state in the embodiment of the present application, and fig. 5 is a timing diagram corresponding to the connection unit in the second state in the embodiment of the present application. In conjunction with the illustrations in fig. 2-3, in the embodiment of the present application, the output signal of the controller 301 is illustrated as a square wave signal when the detection system is in operation, and other types of waveform signals can be output according to the requirements.
The output signal CHECK signal of the controller is a square wave signal, and the square wave signal is converted into a direct current voltage by the main control module 200, and then compared with a preset voltage by the comparator U1A in the judging unit 305, and the controller 301 is enabled to read the output voltage and waveform of the comparator U1A, so as to judge whether the connection of the device is normal.
Specifically, in operation of the above-described line detection circuit, for the waveform driving unit 302: when the voltage Vbe of two ends of the second transistor is more than or equal to 0.6V, the second transistor Q2 is turned on, and when the voltage Vbe of two ends of the first transistor is less than or equal to-0.6V, the first transistor Q1 is turned on; when the CHECK signal is a high level signal, the second transistor Q2 is turned on, and the first transistor Q1 is turned on. At this time, the output signal clk_out is VCC, when the CHECK signal corresponding to the master is a low level signal, the second transistor Q2 is turned off, the first transistor Q1 is turned off, and clk_out is 0V.
For the connection unit 303, in the embodiment of the present application, the controlled modules 201 on both sides are connected with the master control module 200. And one side of the controller in the main control module 200 outputs signals, and the other side receives signals, so that a loop for communication is formed between the main control module and the controlled module 201.
In this embodiment, the connection line on the outermost side of the connection unit 303 represents the maximum error of the butt joint between the cable and the connector, and the connection effect is determined by judging the connection condition on the outermost side. If the connection condition between the detection output line 401 and the detection input line 402 and the master control module and the controlled module is judged, the connection effect of the device is judged.
Further, in operation, the waveform detection unit 304: the first capacitor C1 blocks direct current and transmits alternating current signals, and the first diode D1 and the second diode D2 rectify the alternating current signals and output the rectified alternating current signals to the second capacitor C2 and the fourth resistor R4, so that direct current voltage is generated at an a node of the end of the comparator U1A; and when clk_out has a square wave signal, the voltage a at the a node is >0V, otherwise the voltage a=0v at the a node.
Further, in operation, in the judging unit 305, the fifth resistor R5 and the sixth resistor R6 divide VCC to generate the voltage at the node b, and at this time, the LINK signal is a high level signal when the voltage a > b at the two nodes, and is a low level signal when the node voltage a < b.
In this embodiment of the present application, when the detection signal CHECK signal and the LINK signal change synchronously during processing the line detection circuit, it indicates that the device is well connected.
Specifically, when the detection signal CHECK signal is at a low level, the LINK signal is at a low level, the CHECK signal is a square wave, and the LINK signal is at a high level, the cable connection in the connection unit is normal. When the CHECK signal is at low level and the LINK signal is at high level, the output signal and the input signal are not synchronously changed, and the circuit is judged to be abnormal. In detail, as shown in fig. 4, in the right fault section corresponding to the time sequence, the CHECK signal and the LINK signal are not synchronously changed, so as to judge the connection condition of the CHECK signal and the LINK signal.
Further, in the embodiment of the present application, the abnormal situation of the connection unit may be further interpreted: when the detection signal CHECK signal is at a low level, the LINK signal is at a low level, and the CHECK signal is a square wave, the cable connection is normal. When the CHECK signal is a square wave and the LINK signal is at a low level, the LINK signal is an output signal of the line detection circuit, and the LINK signal is at a low level, which indicates that the cable connection in the connection unit is in a disconnected state. And judging the connection condition or the plugging condition of the connecting wires at the two sides of the connector corresponding to the connecting unit. In detail, referring to the timing sequence in fig. 5, in the timing sequence corresponding to the disconnection section, when the CHECK signal is a square wave signal, the LINK signal is always a low level signal, and at this time, it indicates that the cable in the connection unit is in a disconnected state, so as to further judge the connection condition of the device.
Further, the embodiment of the application also provides a display device, wherein the display device comprises a driving system and a display panel connected with the driving system, wherein the driving system is used for providing control signals for the display panel, when the driving system is communicated with the display panel, the driving system can be connected through a connector or other connecting units, and the driving system is provided with a detection system provided in the embodiment of the application, so that the connection condition of the driving system is judged through a corresponding circuit detection circuit in the detection system, and the product yield and the comprehensive performance of the display device are improved.
In summary, the detection system and the display device provided by the embodiments of the present invention have been described in detail, and specific examples are applied to illustrate the principles and the implementation of the present invention, and the description of the above embodiments is only used to help understand the technical solution and the core idea of the present invention; although the present invention has been described with reference to the preferred embodiments, it should be understood that the invention is not limited to the particular embodiments described, but can be modified and altered by persons skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. A detection system, comprising:
the system comprises a main control module and a controlled module electrically connected with the main control module, wherein the main control module comprises a circuit detection circuit, and the circuit detection circuit is used for detecting the communication between the main control module and the controlled module, and the circuit detection circuit comprises:
a controller to provide a detection signal to the waveform driving unit;
a waveform driving unit that receives the detection signal;
the connecting unit is used for connecting the main control module and the controlled module and receiving the output signal of the waveform driving unit;
the waveform detection unit is electrically connected with the connection unit and is used for receiving an output signal of the connection unit; the method comprises the steps of,
and one end of the judging unit is electrically connected with the waveform detecting unit, and the other end of the judging unit is electrically connected with the controller.
2. The detection system according to claim 1, wherein the connection unit includes a plurality of connection wires, one end of the connection wires is electrically connected to a first connection terminal on the main control module, and the other end of the connection wires is electrically connected to a second connection terminal on the controlled module.
3. The detection system according to claim 1, wherein the waveform driving unit includes:
a first transistor, wherein a first port of the first transistor is electrically connected with the VCC end and one end of a first resistor;
the other end of the first resistor is electrically connected with the second port of the first transistor and one end of the second resistor;
the other end of the second resistor is electrically connected with the first port of the second transistor;
a second transistor, wherein a second port of the second transistor is electrically connected with one end of the third resistor;
the other end of the third resistor is electrically connected with the output end of the controller;
and one end of the seventh resistor is electrically connected with the third port of the first transistor and the output end of the waveform driving unit, and the other end of the seventh resistor is grounded.
4. The detection system of claim 3, wherein the first transistor is configured as a PNP transistor and the second transistor is configured as an NPN transistor.
5. The detection system according to claim 4, wherein the second transistor is turned on when a voltage across the second transistor is equal to or greater than 0.6V.
6. The detection system of claim 1, wherein the master control module further comprises:
one end of the first capacitor is electrically connected with one end of the connecting unit, and the other end of the first capacitor is electrically connected with one ends of the first diode and the second diode;
the other end of the first diode is electrically connected with one end of the second capacitor, one end of the fourth resistor and the output end of the waveform detection unit;
the other end of the second diode is grounded; the method comprises the steps of,
the other end of the second capacitor is electrically connected with the other end of the fourth resistor;
and one end of the fourth resistor is electrically connected with the output end of the waveform detection unit, one end of the second capacitor and the other end of the first transistor.
7. The detection system according to claim 6, wherein the voltage at the output of the waveform detection unit is greater than 0 when the waveform signal is present at the input of the connection unit.
8. The detection system according to claim 1, wherein the judging unit further includes:
the first end of the comparator is electrically connected with the output end of the judging unit, the second end of the comparator is electrically connected with the other end of the fifth resistor and one end of the sixth resistor, the third end of the comparator is electrically connected with the output end of the waveform detecting unit, the fourth end of the comparator is grounded, and the fifth end of the comparator is electrically connected with the VCC end;
one end of the fifth resistor is electrically connected with the VCC end; the method comprises the steps of,
and the other end of the sixth resistor is grounded.
9. The detecting system according to claim 1, wherein a waveform of the output signal corresponding to the other end of the judging unit changes in synchronization with a waveform of the detection signal output by the controller.
10. A display device, comprising:
the display device comprises a driving system and a display panel electrically connected with the driving system, wherein the driving system is used for providing control signals for the display panel;
wherein the drive system comprises a detection system according to any of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310851037.4A CN117475800A (en) | 2023-07-11 | 2023-07-11 | Detection system and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310851037.4A CN117475800A (en) | 2023-07-11 | 2023-07-11 | Detection system and display device |
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| CN117475800A true CN117475800A (en) | 2024-01-30 |
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| CN202310851037.4A Pending CN117475800A (en) | 2023-07-11 | 2023-07-11 | Detection system and display device |
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