CN114114064A - Display unit detection method and device - Google Patents
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Abstract
The invention relates to a display unit detection method and a display unit detection device, wherein the method comprises the following steps: taking the N detection output values as current detection output values one by one, and performing display unit state detection based on the current detection output values and M reference threshold values corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values; and obtaining circuit characteristic information corresponding to the display units based on the N × M detection results, the N detection output values and M reference threshold values corresponding to the detection output values corresponding to each display unit so as to finish the detection of the display units. The invention can accurately detect the display state corresponding to the display unit.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display unit detection method and a display unit detection apparatus.
Background
With the development of LED display technology, LED display screens are currently used in various fields due to their advantages of low cost, low power consumption, high visibility, freedom in assembly, etc. The LED display screen is based on semiconductor technology which is developed vigorously for decades, has a series of advantages of adjustable brightness range, safety, environmental protection, energy conservation, bright color, large visual range, clear content and the like, is easy to update, low in cost and good in timeliness compared with other traditional information media, meanwhile, bright and smooth colored moving pictures attract the eyes of people more easily, and has incomparable advantages compared with other media in information display and transmission. At present, LED display screens are developing towards higher brightness, higher weatherability and higher light emitting density, and meanwhile, the requirements of people on the display quality are becoming stricter.
Since each lamp point of the LED display screen is attenuated, aged, early-dying, or dead in different degrees during the use process, and the attenuation, aging, early-dying, or dead in different degrees of each lamp point are very important for the consistency of the LED display screen, it is very important for the display of the LED display screen to detect the state of the lamp point of the LED display screen during the use process.
Disclosure of Invention
Therefore, the embodiment of the invention discloses a display unit detection method, a display unit detection device, a display unit detection system and a computer readable storage medium, which can accurately detect the corresponding display state of a display unit.
Specifically, in a first aspect, a method for detecting a display unit disclosed in an embodiment of the present invention includes: taking the N detection output values as current detection output values one by one, and performing display unit state detection based on the current detection output values and M reference threshold values corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values; and obtaining circuit characteristic information corresponding to the display units based on the N × M detection results, the N detection output values and M reference threshold values corresponding to the detection output values corresponding to each display unit so as to finish the detection of the display units.
At present, because each lamp point of the LED display screen is attenuated, aged, early-dying, or dead to a different extent in the using process, and the attenuated, aged, early-dying, or dead to a different extent of each lamp point is very important for the consistency of the LED display screen, it is very important for the display of the LED display screen to detect the state of the lamp point of the LED display screen in the using process; in the embodiment of the invention, the N detection output values are used as the current detection output values one by one, and the display unit state detection is carried out on the basis of the current detection output values and the corresponding M reference threshold values, so that N × M detection results of N detection current values corresponding to each display unit in the display lamp panel are obtained, the circuit characteristic information of each display unit is obtained, the display state of the display unit can be accurately detected, and a prepared data support is provided for the later maintenance of the display lamp panel.
In an embodiment of the present invention, the method for detecting a display unit further includes: and comparing the circuit characteristic information corresponding to each display unit with reference circuit characteristic information to obtain the circuit characteristic distribution state of the display lamp panel.
And comparing the circuit characteristic information corresponding to each display unit with the reference circuit characteristic information to obtain a circuit characteristic distribution state, and then counting the circuit characteristic distribution state of each display unit to obtain the early warning information of the display lamp panel so as to finish the early warning of the display lamp panel.
In an embodiment of the present invention, before the taking N detection output values as current detection output values one by one and performing display unit state detection based on the current detection output values and M reference threshold values corresponding to the current detection output values, the method further includes: and acquiring the N detection output values and M reference threshold values corresponding to each detection output value according to user input information.
The user can input information to obtain the detection output value and the reference threshold value, so that the self-definition of the state detection of the display unit can be realized.
In an embodiment of the present invention, the step of taking the N detection output values as current detection output values one by one, and performing display unit state detection based on the current detection output values and M reference thresholds corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values includes: outputting the current detection output value to the display unit to obtain a measurement value corresponding to the display unit; and comparing the measured values with the M reference thresholds respectively to obtain M detection results of the display unit corresponding to the current detection output value.
In an embodiment of the present invention, the comparing the measured values with the M reference thresholds respectively to obtain M detection results of the display unit corresponding to the current detection output value includes: in response to the display unit state detection being an open circuit detection, determining the magnitude of the measurement value and each of the reference thresholds: when the measured value is smaller than the reference threshold value, the detection result is that the detection is failed; when the measured value is not smaller than the reference threshold value, the detection result is that the detection is passed; in response to the display unit state detection being a short circuit detection, determining the magnitude of the measurement value and each of the reference thresholds: when the measured value is larger than the reference threshold value, the detection result is that the detection is failed; and when the measured value is not larger than the reference threshold value, the detection result is that the detection is passed.
In an embodiment of the present invention, the step of taking the N detection output values as current detection output values one by one, and performing display unit state detection based on the current detection output values and M reference thresholds corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values specifically includes: responding to that the N detection output values are N detection current values, and the M reference threshold values are M reference current threshold values, and outputting the current detection current value to the display unit to obtain a measurement current value corresponding to the display unit; comparing the measured current value with the M reference current thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value; or in response to that the N detection output values are N detection voltage values and the M reference threshold values are M reference voltage threshold values, outputting the current detection voltage value to the display unit to obtain a measurement voltage value corresponding to the display unit; and comparing the measured voltage values with the M reference voltage thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value.
In one embodiment of the invention, the circuit characteristic information includes an actual current-voltage characteristic curve of the display unit.
In an embodiment of the present invention, the step of taking the N detection output values as current detection output values one by one, and performing display unit state detection based on the current detection output values and M reference thresholds corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values specifically includes: outputting the current detection output value and the M reference threshold values corresponding to the current detection output value to a display driving chip, so that the display driving chip stores the current detection output value and the M reference threshold values corresponding to the current detection output value; issuing a detection starting instruction to the display driving chip so that the display driving chip outputs the current detection output value to the display units corresponding to the current detection row to obtain the measured values respectively corresponding to the display units, and comparing the measured value corresponding to each display unit with the M reference thresholds respectively to obtain M detection results of the display units; and issuing a data return instruction to the display driving chip so as to output the M detection results by the display driving chip.
In a second aspect, a display unit detection apparatus disclosed in an embodiment of the present invention includes: the state detection module is used for taking the N detection output values as current detection output values one by one, and performing display unit state detection based on the current detection output values and M reference threshold values corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values; and the information generation module is used for obtaining circuit characteristic information corresponding to the display units based on the N × M detection results, the N detection output values and the M reference threshold values corresponding to the detection output values corresponding to each display unit so as to finish the detection of the display units.
In one embodiment of the present invention, the display unit inspection apparatus further comprises: and the lamp panel state acquisition module is used for comparing the circuit characteristic information corresponding to each display unit with reference circuit characteristic information respectively to obtain the circuit characteristic distribution state of the display lamp panel.
In an embodiment of the present invention, the state detection module is specifically configured to: responding to that the N detection output values are N detection current values, and the M reference threshold values are M reference current threshold values, and outputting the current detection current value to the display unit to obtain a measurement current value corresponding to the display unit; comparing the measured current value with the M reference current thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value; or in response to that the N detection output values are N detection voltage values and the M reference threshold values are M reference voltage threshold values, outputting the current detection voltage value to the display unit to obtain a measurement voltage value corresponding to the display unit; and comparing the measured voltage values with the M reference voltage thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value.
In a third aspect, a display unit detection system disclosed in an embodiment of the present invention includes: a processor and a memory coupled to the processor; wherein the memory stores instructions for execution by the processor, and the instructions cause the processor to perform operations for performing a display unit detection method as described in any one of the preceding.
In a fourth aspect, an embodiment of the present invention discloses a computer-readable storage medium, which stores computer-readable instructions, where the computer-readable instructions include instructions for executing any one of the display unit detection methods described above.
As can be seen from the above, the embodiments of the present invention can achieve one or more of the following advantages: the N detection output values are used as the current detection output values one by one, and the display unit state detection is carried out on the basis of the current detection output values and the corresponding M reference threshold values, so that N M detection results of each display unit in the display lamp panel corresponding to N detection current values are obtained, the circuit characteristic information of each display unit is obtained, the detection information of the display units can be accurately obtained, various states of the display units can be accurately known on the basis of the circuit characteristic information, the state information of the display units is obtained in advance, and prepared data support is provided for later maintenance of the display lamp panel; the circuit characteristic distribution state is obtained by comparing the circuit characteristic information corresponding to each display unit with the reference circuit characteristic information, and therefore the circuit characteristic distribution state of each display unit can be counted to obtain the early warning information of the display lamp panel, and early warning of the display lamp panel is completed; the user can input information to obtain the detection output value and the reference threshold value, so that the self-definition of the state detection of the display unit can be realized.
Other aspects and features of the present invention will become apparent from the following detailed description, which proceeds with reference to the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention. It should be further understood that the drawings are not necessarily drawn to scale and that, unless otherwise indicated, they are merely intended to conceptually illustrate the structures and procedures described herein.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flowchart illustrating a method for detecting a display unit according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating another step of a method for detecting a display unit according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a display unit inspection system according to a specific implementation of a display unit inspection method according to a first embodiment of the present disclosure;
fig. 4a is a schematic diagram of an LED module according to an embodiment of a method for detecting a display unit disclosed in a first embodiment of the present invention;
fig. 4b is a schematic diagram of an internal logic of a driving chip according to a specific implementation of the method for detecting a display unit disclosed in the first embodiment of the present invention;
FIG. 5 is a block diagram of a display unit inspection apparatus according to a second embodiment of the present invention;
FIG. 6 is a schematic block diagram of a display unit inspection apparatus according to a second embodiment of the present disclosure;
FIG. 7 is a schematic structural diagram of a display unit inspection system according to a third embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a computer-readable storage medium according to a fourth embodiment of the disclosure.
[ description of reference ]
S11-S15: a step of a display unit detection method;
20: a display unit detection device; 21: a state detection module; 22: an information generation module; 23: a lamp panel state acquisition module;
60: a display unit detection system; 61: a processor; 62: a memory;
70: a computer readable storage medium.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The invention will be described in connection with embodiments with reference to the drawings.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the division of the embodiments of the present invention is only for convenience of description and should not be construed as a limitation, and features of various embodiments may be combined and referred to each other without contradiction.
[ first embodiment ] A method for manufacturing a semiconductor device
Referring to fig. 1, a first embodiment of the present invention discloses a display unit detecting method. As shown in fig. 1, the display unit detecting method includes, for example, steps S11 to S13.
Step S11: taking the N detection output values as current detection output values one by one, and performing display unit state detection based on the current detection output values and M reference threshold values corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values;
step S13: and obtaining circuit characteristic information corresponding to the display units based on the N × M detection results, the N detection output values and M reference threshold values corresponding to the detection output values corresponding to each display unit so as to finish the detection of the display units.
Specifically, in step S11, the detection output value mentioned is, for example, a detection current value or a detection voltage value. Reference thresholds are mentioned, for example, current thresholds or voltage thresholds. The mentioned display lamp panel is, for example, an LED lamp panel, and the mentioned display unit is, for example, an LED lamp point. N is mentioned as an integer greater than 1 and M is mentioned as an integer greater than 1.
In step S13, the detection result is, for example, a pass or a fail of detection. The circuit characteristic information mentioned includes, for example: the display state of the display unit is, for example, on-off state, and actual current-voltage characteristic curve, wherein the actual current-voltage characteristic curve is referred to as V-I characteristic curve located in the first quadrant.
The N detection output values are used as the current detection output values one by one, and the display unit state detection is carried out on the basis of the current detection output values and the corresponding M reference threshold values, so that N M detection results of each display unit in the display lamp panel corresponding to N detection current values are obtained, the circuit characteristic information of each display unit is obtained, the display state of the display unit can be accurately detected, and prepared data support is provided for later maintenance of the display lamp panel.
In other embodiments of the present invention, as shown in fig. 2, the display unit detection method further includes, for example: step S15.
Step S15: and comparing the circuit characteristic information corresponding to each display unit with reference circuit characteristic information to obtain the circuit characteristic distribution state of the display lamp panel.
In step S15, the reference circuit characteristic information mentioned includes, for example: reference volt-ampere characteristic, which is a V-I characteristic located in the first quadrant. The reference current-voltage characteristic curve may be a current-voltage characteristic curve corresponding to the display unit before the display unit is not used in a factory. Step S15 may be understood as that the circuit characteristic distribution states of all display units in the display lamp panel are obtained by comparing the reference circuit characteristic information of the display units in the current batch, and the early warning may be completed in advance through statistics.
In other embodiments of the present invention, step S11 may be preceded by, for example: and acquiring the N detection output values and M reference threshold values corresponding to each detection output value according to user input information.
The mentioned user input information can be understood as an information input box provided by the software interface, and a user inputs the detection output value and the reference threshold value in the information input box, so that the software acquires the detection output value and the reference threshold value based on the user input information, and the self-definition of the detection of the display unit can be realized.
In other embodiments of the present invention, step S11 includes, for example: outputting the current detection output value to the display unit to obtain a measurement value corresponding to the display unit; and comparing the measured values with the M reference thresholds respectively to obtain M detection results of the display unit corresponding to the current detection output value.
In another embodiment of the present invention, the comparing the measured values with the M reference thresholds respectively to obtain M detection results of the display unit corresponding to the current detection output value includes: in response to the display unit state detection being an open circuit detection, determining the magnitude of the measurement value and each of the reference thresholds: when the measured value is smaller than the reference threshold value, the detection result is that the detection is failed; when the measured value is not smaller than the reference threshold value, the detection result is that the detection is passed; in response to the display unit state detection being a short circuit detection, determining the magnitude of the measurement value and each of the reference thresholds: when the measured value is larger than the reference threshold value, the detection result is that the detection is failed; and when the measured value is not larger than the reference threshold value, the detection result is that the detection is passed.
In another embodiment of the present invention, the aforementioned taking N detection output values as current detection output values one by one, and performing display unit state detection based on the current detection output values and M reference thresholds corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values specifically includes, for example: responding to that the N detection output values are N detection current values, and the M reference threshold values are M reference current threshold values, and outputting the current detection current value to the display unit to obtain a measurement current value corresponding to the display unit; comparing the measured current value with the M reference current thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value; or in response to that the N detection output values are N detection voltage values and the M reference threshold values are M reference voltage threshold values, outputting the current detection voltage value to the display unit to obtain a measurement voltage value corresponding to the display unit; and comparing the measured voltage values with the M reference voltage thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value.
In another embodiment of the present invention, the aforementioned taking N detection output values as current detection output values one by one, and performing display unit state detection based on the current detection output values and M reference thresholds corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values specifically includes, for example:
(i) outputting the current detection output value and the M reference thresholds corresponding to the current detection output value to the display driving chip, so that the display driving chip stores the current detection output value and the M reference thresholds corresponding to the current detection output value;
(ii) issuing a detection starting instruction to the display driving chip so that the display driving chip outputs the current detection output value to the display units corresponding to the current detection row to obtain the measured values respectively corresponding to the display units, and comparing the measured value corresponding to each display unit with the M reference thresholds respectively to obtain M detection results of the display units;
(iii) and issuing a data return instruction to the display driving chip so as to output the M detection results by the display driving chip.
For convenience of understanding, a specific implementation of the display unit detection method disclosed in the embodiment of the present invention is illustrated below with reference to fig. 3 and fig. 4a and 4 b.
As shown in fig. 3, the display unit detection method implemented by this embodiment is implemented in an LED display screen control system, where the LED display screen control system is connected to an LED display screen, and the LED display screen is formed by splicing four LED lamp panels, and each LED lamp panel is connected by a plurality of driving chips, although the invention is not limited to fig. 3.
The software interface of the LED display screen control system displays an information input box to prompt a user to input the detection output value level, the reference threshold level corresponding to each detection output value level, and the number of detection lines.
As shown in fig. 4a, for example, each driver chip is connected to an LED module including 16 × 8 LED light points, the number of rows of detection input by the user is 8, the software defaults to perform detection line by line from the first row, for example, the user inputs 3 current levels, the software generates 3 detected current values I1, I2, and I3 based on the 3 current levels input by the user, the user inputs 5 current threshold levels based on each current level, the software generates a current threshold corresponding to each detected current value based on the 5 current threshold levels input by the user, 5 current thresholds IV1-IV5 corresponding to the detected current value I1, 5 current thresholds IV5-IV10 corresponding to the detected current value I2, and 5 current thresholds IV11-IV15 corresponding to the detected current value I3, it should be noted that the current thresholds corresponding to different detected current values may be the same, may also be different.
The LED display screen control system takes 8 detection lines as current detection lines one by one to detect the state of the LED lamp points, specifically, takes detection current values I1-I3 as the current detection current values of the current detection lines one by one, and outputs the current detection current values and 5 current threshold values corresponding to the current detection current values to the driving chip to detect the state of the LED lamp points.
The LED display screen control system firstly detects the LED grade of a first row, outputs a detection current value I1 and 5 current thresholds IV1-IV5 corresponding to the detection current value I1 to a driving chip, and the internal logic division of the driving chip is shown in figure 4b, as shown in figure 4b, the driving chip enables the input detection current value I1 and the corresponding 5 current thresholds IV1-IV5 to reach a shift buffer area through a DIN channel and stores the shift buffer area into an internal SRAM, then the LED display screen control system issues a detection starting command to the driving chip through the combination of DCLK and LE, the driving chip enters a state detection function, at the moment, the current I1 to be detected is output to 16 channels corresponding to the LED lamp points of the first row through a channel control module, namely 16 LED lamp points, and then 16 current measurement values corresponding to the 16 LED lamp points are obtained, the detection circuit compares the 16 current measurement values with 5 current threshold values respectively, so that 5 detection results corresponding to each LED lamp point in the 16 LED lamp points are obtained, the obtained detection results are stored in a detection state return module of the driving chip, then the LED display screen control system issues a data return command to the driving chip through the combination of DCLK and LE, the driving chip outputs the stored detection results to the DOUT port through DCLK, the LED display screen control system collects data on the DOUT port for storage, and therefore 5 detection results of the detection current value I1 corresponding to each LED lamp point in the first row of LED lamp points are obtained.
The detection circuit compares the 16 current measurement values with the 5 current threshold values respectively to obtain 5 detection results corresponding to each of the 16 LED lamp points, which can be understood as that the detection circuit obtains the detection results by comparing the measurement current values with the current threshold values, before the comparison, the detection circuit determines whether the current detection is open-circuit detection or short-circuit detection, wherein the open-circuit detection or the short-circuit detection is set by a user through software in advance, or can be understood as that the driving chip can automatically judge whether the current detection is open-circuit detection or short-circuit detection according to the current threshold values, and then selects a corresponding comparison rule. For example, if the current detection is an open-circuit detection, when the current measurement value is smaller than the current threshold, the corresponding channel is considered to be open-circuit, the detection does not pass, the detection result is "1", when the current measurement value is not smaller than the current threshold, the detection passes, and the detection result is "0", similarly, when the current detection is a short-circuit detection, the current measurement value is larger than the current threshold, the corresponding channel is considered to be short-circuit, the detection does not pass, the detection result is "1", and when the current measurement value is not larger than the current threshold, the detection passes, and the detection result is "0".
Next, the LED display control system changes the detected current value, that is, the detected current value I2 and the 5 current thresholds IV6-IV10 corresponding to the detected current value I2 are sent to the driving chip, and the above-mentioned detection steps are continued to obtain 5 detection results of the detected current value I2 corresponding to each LED lamp in the first row of LED lamps.
Then, the LED display screen control system changes the detected current value again, that is, the detected current value I3 and the 5 current thresholds IV11-IV15 corresponding to the detected current value I3 are issued to the driving chip, and the above-mentioned detection steps are continued to obtain 5 detection results of the detected current value I3 corresponding to each LED lamp point in the first row of LED lamp points.
Therefore, the LED display screen control system acquires 15 detection results of each LED lamp point in the first row of LED lamp points.
And then, the LED display screen control system changes the line configuration, namely, the current detection line is changed into a line 2, the detection steps are repeated until the LED lamp points of the line are detected, and then the LED display screen control system sends a detection closing command to drive the chip to restore the internal resources.
At this time, the LED display screen control system obtains a detection result of each LED lamp point in the LED module including 16 × 8 LED lamp points, and then obtains circuit characteristic information of each LED lamp point based on the detection result of each LED lamp point, a detection current value corresponding to each detection result, and a current threshold value, where the circuit characteristic information includes, for example, a display state of the LED lamp point, such as an on-off state and an actual volt-ampere characteristic curve of normal operation, and the on-off state can be understood as whether the LED lamp point is an open circuit, a short circuit, or a normal operation state, and the actual volt-ampere characteristic curve can be understood as a forward volt-ampere characteristic curve corresponding to the LED lamp point in the normal state.
The state that LED lamp point corresponds can accurately be detected out based on the circuit characteristic information of every LED lamp point that obtains, provides the data support of preparation for the maintenance of later stage to the display lamp plate.
Further, the circuit characteristic information corresponding to each LED lamp point is compared with reference circuit characteristic information to obtain a circuit characteristic distribution state of the LED lamp panel, where the reference circuit characteristic information is circuit characteristic information corresponding to each LED lamp point leaving a factory, for example, the reference circuit characteristic information includes a reference volt-ampere characteristic curve, that is, a forward volt-ampere characteristic curve corresponding to each LED lamp point before leaving the factory and before use. Here, it can be understood that the circuit characteristic distribution states of all the LED lamp points are obtained by comparing the circuit characteristic information of the LED lamp points of the current batch with the reference circuit characteristic information, and the early warning can be completed in advance through statistics.
The LED display screen control system comprises an upper computer, a synchronous sending card and a receiving card which are connected in sequence, wherein the receiving card is connected with each driving chip. Reference to a host computer is made, for example, to a personal computer, hand-held or portable device, tablet device, multiprocessor system, microprocessor-based system, editable consumer electronics, network PC, minicomputer, mainframe computer, distributed computing environment that includes any of the above systems or devices, and the like. The upper computer is used for displaying the circuit characteristic information corresponding to each LED lamp point. The synchronous transmitting card comprises a video source input interface, a programmable logic device connected with the video source input interface, a microprocessor connected with the programmable logic device, a memory connected with the microprocessor and the programmable logic device, an Ethernet interface connected with the programmable logic device and the like. The mentioned receiving card includes devices such as an ethernet interface, a programmable logic device connected to the ethernet interface, and a lamp panel interface connected to the programmable logic device, for example, the lamp panel interface is connected to the driving chip.
Of course, in other embodiments of the present invention, the LED display screen control system includes, for example, an asynchronous control card and a receiving card connected in sequence, where the asynchronous control card is connected with a display for displaying the circuit characteristic information corresponding to each LED lamp. The asynchronous control card includes, for example, a video source input interface, a programmable logic device connected to the video source input interface, an ethernet interface connected to the programmable logic device, and an ARM-based processor connected to the programmable logic device.
The aforementioned video source input interface is, for example, an HDMI interface or a DVI interface. The mentioned ethernet interface is for example an RJ45 interface, and the mentioned Programmable logic device is for example an FPGA (Field-Programmable Gate Array) or other similar logic device. The microprocessor mentioned is for example an MCU. The memory mentioned is for example a Flash memory. The mentioned lamp panel interface is for example a bus bar connector.
In the above description, the detection output value is taken as a detection current value, and the reference threshold value is taken as a current threshold value, and when the detection output value is taken as a detection voltage value, the circuit characteristic information of each display unit can be obtained by the above steps by referring to the threshold value as a voltage threshold value. The aforementioned operations performed by the LED display screen control system may also be directly performed by the driving chip, and the embodiment does not limit the execution subject of the specific steps.
In summary, in the display unit detection method disclosed in the embodiment of the present invention, the N detection output values are used as the current detection output values one by one, and the display unit state detection is performed based on the current detection output values and the corresponding M reference threshold values, so as to obtain N × M detection results of the N detection current values corresponding to each display unit in the display lamp panel, thereby obtaining the circuit characteristic information of each display unit, accurately detecting the display state of the display unit, and providing a prepared data support for the later maintenance of the display lamp panel.
[ second embodiment ]
As shown in fig. 5, a second embodiment of the present invention discloses a display unit detecting device 20, which includes a state detecting module 21 and an information generating module 22.
The state detection module 21 is configured to use the N detection output values as current detection output values one by one, and perform display unit state detection based on the current detection output values and M reference thresholds corresponding to the current detection output values, so as to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values. The information generating module 22 is configured to obtain circuit characteristic information corresponding to the display unit based on the N × M detection results, the N detection output values, and the M reference thresholds corresponding to the detection output values, so as to complete detection of the display unit.
In another embodiment of the present invention, as shown in fig. 6, the display unit detecting apparatus further includes: lamp panel state acquisition module 23. The lamp panel state obtaining module 23 is configured to compare the circuit characteristic information corresponding to each display unit with reference circuit characteristic information, respectively, to obtain a circuit characteristic distribution state of the display lamp panel.
In other embodiments of the present invention, the display unit detecting device 20 further includes, for example, an information obtaining module, configured to obtain the N detection output values and M reference threshold values corresponding to each of the detection output values according to user input information.
In other embodiments of the present invention, the state detection module 21 is specifically configured to: outputting the current detection output value to the display unit to obtain a measurement value corresponding to the display unit; and comparing the measured values with the M reference thresholds respectively to obtain M detection results of the display unit corresponding to the current detection output value.
Further, the comparing the measured values with the M reference thresholds respectively to obtain M detection results of the display unit corresponding to the current detection output value includes: in response to the display unit state detection being an open circuit detection, determining the magnitude of the measurement value and each of the reference thresholds: when the measured value is smaller than the reference threshold value, the detection result is that the detection is failed; when the measured value is not smaller than the reference threshold value, the detection result is that the detection is passed; in response to the display unit state detection being a short circuit detection, determining the magnitude of the measurement value and each of the reference thresholds: when the measured value is larger than the reference threshold value, the detection result is that the detection is failed; and when the measured value is not larger than the reference threshold value, the detection result is that the detection is passed.
In other embodiments of the present invention, the state detection module 21 is specifically configured to: responding to that the N detection output values are N detection current values, and the M reference threshold values are M reference current threshold values, and outputting the current detection current value to the display unit to obtain a measurement current value corresponding to the display unit; comparing the measured current value with the M reference current thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value; or in response to that the N detection output values are N detection voltage values and the M reference threshold values are M reference voltage threshold values, outputting the current detection voltage value to the display unit to obtain a measurement voltage value corresponding to the display unit; and comparing the measured voltage values with the M reference voltage thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value.
In other embodiments of the present invention, the state detection module 21 is specifically configured to output the current detection output value and the M reference thresholds corresponding to the current detection output value to a display driver chip, so that the display driver chip stores the current detection output value and the M reference thresholds corresponding to the current detection output value; issuing a detection starting instruction to the display driving chip so that the display driving chip outputs the current detection output value to the display units corresponding to the current detection row to obtain the measured values respectively corresponding to the display units, and comparing the measured value corresponding to each display unit with the M reference thresholds respectively to obtain M detection results of the display units; and issuing a data return instruction to the display driving chip so as to output the M detection results by the display driving chip.
The display unit detection method implemented by the display unit detection apparatus 20 disclosed in this embodiment is as described in the first embodiment, and therefore, will not be described in detail herein. Optionally, each module, unit and the other operations or functions in the second embodiment are respectively for implementing the method in the first embodiment of the present invention, and are not described herein for brevity.
[ third embodiment ]
Referring to fig. 7, a display unit inspecting system according to a third embodiment of the present invention is disclosed. As shown in fig. 7, the display unit detection system 60 includes, for example: a processor 61 and a memory 62 connected to the processor 61. Wherein the memory 62 stores instructions for execution by the processor 61 and which cause the processor 61 to perform operations for performing the display unit detection method as described in the first embodiment.
[ fourth example ] A
Referring to fig. 8, a computer-readable storage medium is disclosed in a fourth embodiment of the present invention. As shown in fig. 8, the computer-readable storage medium 70 stores computer-readable instructions including instructions for performing the display unit detecting method according to the first embodiment.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and/or method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and the actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
So far, the principle and the implementation of the display unit detection method, the display unit detection device, the display unit detection system and the computer readable medium of the present invention are explained in the present document by applying specific examples, and the above description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention, and the scope of the present invention should be subject to the appended claims.
Claims (11)
1. A display unit detection method, comprising:
taking the N detection output values as current detection output values one by one, and performing display unit state detection based on the current detection output values and M reference threshold values corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values;
and obtaining circuit characteristic information corresponding to the display units based on the N × M detection results, the N detection output values and M reference threshold values corresponding to the detection output values corresponding to each display unit so as to finish the detection of the display units.
2. The display unit detection method of claim 1, further comprising:
and comparing the circuit characteristic information corresponding to each display unit with reference circuit characteristic information to obtain the circuit characteristic distribution state of the display lamp panel.
3. The method according to claim 1, further comprising, before the performing display unit state detection by using the N detection output values as current detection output values one by one and based on the current detection output values and M reference thresholds corresponding to the current detection output values:
and acquiring the N detection output values and M reference threshold values corresponding to each detection output value according to user input information.
4. The method for detecting the display unit according to claim 1, wherein the step of using the N detection output values as current detection output values one by one and performing display unit state detection based on the current detection output values and M reference thresholds corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values comprises:
outputting the current detection output value to the display unit to obtain a measurement value corresponding to the display unit;
and comparing the measured values with the M reference thresholds respectively to obtain M detection results of the display unit corresponding to the current detection output value.
5. The method as claimed in claim 4, wherein the comparing the measured values with the M reference thresholds respectively to obtain M detection results of the display unit corresponding to the current detection output value comprises:
in response to the display unit state detection being an open circuit detection, determining the magnitude of the measurement value and each of the reference thresholds:
when the measured value is smaller than the reference threshold value, the detection result is that the detection is failed;
when the measured value is not smaller than the reference threshold value, the detection result is that the detection is passed;
in response to the display unit state detection being a short circuit detection, determining the magnitude of the measurement value and each of the reference thresholds:
when the measured value is larger than the reference threshold value, the detection result is that the detection is failed;
and when the measured value is not larger than the reference threshold value, the detection result is that the detection is passed.
6. The method according to claim 4, wherein the step of taking the N detection output values one by one as a current detection output value and performing display unit state detection based on the current detection output value and M reference thresholds corresponding to the current detection output value to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values specifically comprises:
responding to that the N detection output values are N detection current values, and the M reference threshold values are M reference current threshold values, and outputting the current detection current value to the display unit to obtain a measurement current value corresponding to the display unit; comparing the measured current value with the M reference current thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value; or
In response to that the N detection output values are N detection voltage values and the M reference threshold values are M reference voltage threshold values, outputting a current detection voltage value to the display unit to obtain a measurement voltage value corresponding to the display unit; and comparing the measured voltage values with the M reference voltage thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value.
7. The method according to claim 1, wherein the circuit characteristic information includes an actual current-voltage characteristic curve of the display unit.
8. The method according to claim 1, wherein the step of taking the N detection output values one by one as a current detection output value and performing display unit state detection based on the current detection output value and M reference thresholds corresponding to the current detection output value to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values specifically comprises:
outputting the current detection output value and the M reference threshold values corresponding to the current detection output value to a display driving chip, so that the display driving chip stores the current detection output value and the M reference threshold values corresponding to the current detection output value;
issuing a detection starting instruction to the display driving chip so that the display driving chip outputs the current detection output value to the display units corresponding to the current detection row to obtain the measured values respectively corresponding to the display units, and comparing the measured value corresponding to each display unit with the M reference thresholds respectively to obtain M detection results of the display units;
and issuing a data return instruction to the display driving chip so as to output the M detection results by the display driving chip.
9. A display unit detection apparatus, comprising:
the state detection module is used for taking the N detection output values as current detection output values one by one, and performing display unit state detection based on the current detection output values and M reference threshold values corresponding to the current detection output values to obtain N × M detection results of each display unit in the display lamp panel corresponding to the N detection output values;
and the information generation module is used for obtaining circuit characteristic information corresponding to the display units based on the N × M detection results, the N detection output values and the M reference threshold values corresponding to the detection output values corresponding to each display unit so as to finish the detection of the display units.
10. The display unit detection apparatus according to claim 9, further comprising:
and the lamp panel state acquisition module is used for comparing the circuit characteristic information corresponding to each display unit with reference circuit characteristic information respectively to obtain the circuit characteristic distribution state of the display lamp panel.
11. The display unit detection device of claim 9, wherein the status detection module is specifically configured to:
responding to that the N detection output values are N detection current values, and the M reference threshold values are M reference current threshold values, and outputting the current detection current value to the display unit to obtain a measurement current value corresponding to the display unit; comparing the measured current value with the M reference current thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value; or
In response to that the N detection output values are N detection voltage values and the M reference threshold values are M reference voltage threshold values, outputting a current detection voltage value to the display unit to obtain a measurement voltage value corresponding to the display unit; and comparing the measured voltage values with the M reference voltage thresholds respectively to obtain M detection results of the display unit corresponding to the current detection current value.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734276A (en) * | 2004-08-10 | 2006-02-15 | 康佳集团股份有限公司 | LED screen dead pixel detection method and circuit therefor |
| CN101762772A (en) * | 2010-01-04 | 2010-06-30 | 上海贝岭股份有限公司 | Fault detection device for LED driving circuit and detection method thereof |
| CN101964166A (en) * | 2010-09-13 | 2011-02-02 | 南京通用电器有限公司 | Circuit for detecting dead pixel of LED display screen and method thereof |
| CN102076145A (en) * | 2010-11-02 | 2011-05-25 | 深圳市航盛电子股份有限公司 | Accurate detection and control method and device for automobile LED steering lamp |
| CN203259615U (en) * | 2013-03-18 | 2013-10-30 | 艾尔瓦特集成电路科技（天津）有限公司 | System detecting LED short circuits in LED strings or matching performance between LED strings |
| CN105116355A (en) * | 2015-09-15 | 2015-12-02 | 武汉精测电子技术股份有限公司 | LED module backlight lamp string detection device and detection method thereof |
| CN105307353A (en) * | 2015-11-24 | 2016-02-03 | 成都芯源系统有限公司 | LED driver and fault protection circuit and fault protection method thereof |
| CN105390092A (en) * | 2015-12-09 | 2016-03-09 | 西安诺瓦电子科技有限公司 | LED display screen image processing method, device and application thereof |
| CN106409197A (en) * | 2016-11-21 | 2017-02-15 | 西安诺瓦电子科技有限公司 | LED lamp board fault detection method |
| CN107610628A (en) * | 2017-10-26 | 2018-01-19 | 福州海天微电子科技有限公司 | A kind of LED display unit board checking device and method |
-
2020
- 2020-08-11 CN CN202010802743.6A patent/CN114114064A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734276A (en) * | 2004-08-10 | 2006-02-15 | 康佳集团股份有限公司 | LED screen dead pixel detection method and circuit therefor |
| CN101762772A (en) * | 2010-01-04 | 2010-06-30 | 上海贝岭股份有限公司 | Fault detection device for LED driving circuit and detection method thereof |
| CN101964166A (en) * | 2010-09-13 | 2011-02-02 | 南京通用电器有限公司 | Circuit for detecting dead pixel of LED display screen and method thereof |
| CN102076145A (en) * | 2010-11-02 | 2011-05-25 | 深圳市航盛电子股份有限公司 | Accurate detection and control method and device for automobile LED steering lamp |
| CN203259615U (en) * | 2013-03-18 | 2013-10-30 | 艾尔瓦特集成电路科技（天津）有限公司 | System detecting LED short circuits in LED strings or matching performance between LED strings |
| CN105116355A (en) * | 2015-09-15 | 2015-12-02 | 武汉精测电子技术股份有限公司 | LED module backlight lamp string detection device and detection method thereof |
| CN105307353A (en) * | 2015-11-24 | 2016-02-03 | 成都芯源系统有限公司 | LED driver and fault protection circuit and fault protection method thereof |
| CN105390092A (en) * | 2015-12-09 | 2016-03-09 | 西安诺瓦电子科技有限公司 | LED display screen image processing method, device and application thereof |
| CN106409197A (en) * | 2016-11-21 | 2017-02-15 | 西安诺瓦电子科技有限公司 | LED lamp board fault detection method |
| CN107610628A (en) * | 2017-10-26 | 2018-01-19 | 福州海天微电子科技有限公司 | A kind of LED display unit board checking device and method |
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