CN112951133B - Display module, display device, detection method, storage medium and computer equipment - Google Patents
Display module, display device, detection method, storage medium and computer equipment Download PDFInfo
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Abstract
The invention discloses a display module, a display device, a detection method, a storage medium and computer equipment. The display module includes: the array-arranged pixel unit, the driving chip, the data line and the detection unit comprise a plurality of detection subunits, wherein each detection subunit comprises a first end, a second end and a third end; the detection subunit responds to a control signal accessed by the first signal pin to conduct the second end and the third end, and forms a detection channel with the data line and the driving chip; the driving chip drives each data line according to a preset first mode and respectively detects the corresponding data line according to detection signals of detection subunits of each detection channel accessed by the second signal pin. According to the embodiment of the invention, the detection unit comprising the detection subunits is arranged, each detection subunit forms the detection channel based on the control signal, and the data line is driven and detected based on the preset first mode, so that whether the data line has cracks or not can be accurately detected.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display module, a display device, a detection method, a storage medium, and a computer apparatus.
Background
With advances in consumer electronics technology and changes in consumer trends, the display module portion of mobile phones has gradually transitioned from liquid crystal display module (LCD) display to Organic Light Emitting Diode (OLED) display. OLED products are also in the form of rigid products from the previous years, evolving into today's flexible products. The resolution and the display refresh rate (frame frequency) of OLED products are higher and higher, and the pixel driving structure is more and more complex; the requirements on various properties of the products are becoming higher and higher.
Among flexible products, a terminal Bending (Pad Bending) type of product has been popular at present. Compared with the prior Film on Film packaging (COF) products, the lower frame of the display screen can be made narrower, the display screen body can be made thinner, and the advantages in the aspects of attractiveness and portability are more obvious. In addition, the production cost is more advantageous.
However, at present, display screen manufacturers all have the problem that cracks in the bending area of the lower part of the display module cannot be effectively detected.
Disclosure of Invention
In order to solve at least one of the above problems, a first aspect of the present invention provides a display module comprising pixel units arranged in an array, a driving chip, data lines extending from the driving chip to the pixel units, respectively, and a detection unit disposed between the pixel units and the driving chip, wherein
The detection unit comprises a plurality of detection subunits corresponding to the data lines one by one, each detection subunit comprises a first end, a second end and a third end, wherein the first end is electrically connected with a first signal pin of the driving chip, the second end is electrically connected with the corresponding data line, and the third end is electrically connected with a second signal pin of the driving chip;
the detection subunit responds to a control signal accessed by a first signal pin of the driving chip to conduct the second end and the third end, and forms a detection channel with the data line and the driving chip;
the driving chip drives each data line according to a preset first mode, and detects the corresponding data line according to detection signals of detection subunits of each detection channel accessed by the second signal pin.
In some alternative embodiments, the display module includes a bending portion disposed between the pixel unit and the driving chip, and the detecting unit is disposed between the pixel unit and the bending portion.
In some alternative embodiments, the display module includes a display area and a non-display area, and the detection unit is disposed in the display area or the non-display area.
In some alternative embodiments, the driver chip includes a detection device including a comparator and a memory, wherein
The comparator comprises a first input end, a second input end and an output end, wherein the first input end is connected with a detection signal transmitted by a second signal pin, the second input end is connected with a preset first comparison threshold value, the comparator compares the detection signal with the first comparison threshold value and outputs a comparison result, and the comparison result is output to the memory through the output end;
and the memory is used for storing at least one comparison result of each data line.
In some of the alternative embodiments of the present invention,
the driving chip responds to an external instruction to output each comparison result in the memory;
or alternatively
The display module further comprises an indicator for indicating the comparison result.
A second aspect of the present invention provides a display device, including the display module set described above.
A third aspect of the present invention provides a detection method using the display module set described above, including:
the first signal pin of the driving chip outputs a control signal, so that each detection subunit of the detection unit, the data line and the driving chip form a detection channel;
The driving chip drives each data line according to a preset first mode;
the driving chip detects corresponding data lines respectively according to detection signals of detection subunits of the detection channels accessed by the second signal pins.
In some alternative embodiments, the driver chip includes a detection device including a comparator and a memory, the comparator including a first input, a second input, and an output;
the driving chip driving each data line according to a preset first mode further comprises:
the driving chip connects the second signal pin to the first input end of the comparator to preset the first signal pin
The comparison threshold is connected to the second input end of the comparator;
the driving chip sets the output frequency of each data line as a first frequency, sets the input voltage of each data line as a first voltage and drives each data line according to a preset time sequence;
the driving chip respectively detects corresponding data lines according to detection signals of detection subunits of each detection channel accessed by the second signal pin further comprises:
the control comparator compares the detection signal with a first comparison threshold value and outputs a comparison result; the control comparator outputs the comparison result to the memory through the output end, and the memory stores the comparison result of at least one time of each data line.
In some optional embodiments, after the driving chip detects the corresponding data lines according to the detection signals of the detection subunits of each detection channel accessed by the second signal pin, the detection method further includes:
the driving chip drives each data line according to a preset second mode, and detects the corresponding data line according to detection signals of detection subunits of each detection channel accessed by the second signal pin.
In some optional embodiments, the driving chip drives each data line according to a preset second mode further includes:
the driving chip connects the second signal pin to the first input end of the comparator, and connects the preset second comparison threshold to the second input end of the comparator;
the driving chip sets the output frequency of each data line as a second frequency, sets the input voltage of each data line as a second voltage and drives each data line according to a preset time sequence.
In some alternative embodiments, before the first signal pin of the driving chip outputs the control signal, so that each detection subunit of the detection unit forms a detection channel with the data line and the driving chip, the detection method further includes:
the first signal pin of the driving chip outputs a control signal according to a preset excitation time threshold value, so that each detection subunit of the detection unit, the data line and the driving chip form an excitation loop;
The driving chip excites each data line according to a preset third mode.
In some alternative embodiments, the driving chip further includes:
the driving chip connects the second signal pin to a third voltage;
the driving chip sets the output frequency of each data line to a third frequency and the input voltage of each data line to a fourth voltage.
A fourth aspect of the invention provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements a method as described above.
A fifth aspect of the invention provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing a method as described above when the program is executed.
The beneficial effects of the invention are as follows:
aiming at the existing problems at present, the invention establishes a display module, a display device, a detection method, a storage medium and computer equipment, and sets a detection unit comprising a plurality of detection subunits between a pixel unit and a driving chip in the display module, and the detection subunits form a detection channel in response to a control signal accessed by the driving chip, so that the detection channel is utilized to realize accurate detection of each data line based on driving of the data line in a preset mode, thereby improving the yield of products, reducing the production cost, improving the reliability of the products, reducing the difficulty of later detection and having wide application prospect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic top view of a prior art display module in an unbent state.
Fig. 2 is a schematic cross-sectional view showing a portion below a lower edge of a display area of a related art display module in a bent state.
Fig. 3 shows a schematic top view of a display module according to an embodiment of the invention.
Fig. 4 shows a schematic block diagram of a driving chip of a display module according to an embodiment of the present invention.
Fig. 5 illustrates a schematic cross-sectional view of a portion below a lower edge of a display area of a display module according to an embodiment of the present invention in a bent state.
Fig. 6 shows a schematic block diagram of a method of detecting a display module according to an embodiment of the present invention.
Fig. 7 illustrates waveforms of driving signals when the display module drives the data lines according to an embodiment of the present invention.
Fig. 8 illustrates a driving signal waveform of a data line when a display module according to an embodiment of the present invention is in an active mode.
Fig. 9 is a schematic diagram of a computer device according to another embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to preferred embodiments and the accompanying drawings. Like parts in the drawings are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and that this invention is not limited to the details given herein.
As shown in fig. 1, which is a schematic top view of a display module in the prior art, the display module includes a display area and a non-display area surrounding the display area, the display area includes pixel units arranged in an array, the non-display area includes a driving chip, the display module further includes data lines corresponding to columns of the pixel units, data output by the driving signals are received to drive the pixel units in the corresponding columns, and once a crack occurs in the data lines, the pixel units cannot be normally lighted for display. As shown in fig. 2, when the non-display area at the lower part of the display module is bent, the bending area becomes a crack high-incidence position, but the display module in the prior art does not have a scheme capable of effectively detecting the hidden cracks, so that the yield of the product leaving the factory is low, and the crack position cannot be effectively detected after later maintenance.
Based on one of the above problems, as shown in FIG. 3, one embodiment of the present invention provides a display module comprising pixel units arranged in an array, a driving chip, data lines extending from the driving chip to the pixel units, and a detection unit disposed between the pixel units and the driving chip
The detection unit comprises a plurality of detection subunits corresponding to the data lines one by one, each detection subunit comprises a first end, a second end and a third end, wherein the first end is electrically connected with a first signal pin of the driving chip, the second end is electrically connected with the corresponding data line, and the third end is electrically connected with a second signal pin of the driving chip;
the detection subunit responds to a control signal accessed by a first signal pin of the driving chip to conduct the second end and the third end, and forms a detection channel with the data line and the driving chip;
the driving chip drives each data line according to a preset first mode, and detects the corresponding data line according to detection signals of detection subunits of each detection channel accessed by the second signal pin.
In the embodiment, the detection units comprising the detection subunits are arranged between the pixel units and the driving chip in the display module, and the detection subunits form the detection channels in response to the control signals accessed by the driving chip, so that the accurate detection of each data line is realized by using the detection channels based on the driving of the data line in the preset mode, the product yield is improved, the production cost is reduced, the product reliability is improved, and in addition, the later detection difficulty can be reduced, so that the display module has a wide application prospect.
In a specific example, as shown in fig. 3, the display module includes pixel units 301 arranged in an array, a driving chip 303, data lines 305 respectively extending from the driving chip to each pixel unit 301, and a detection unit 307 disposed between the pixel units 301 and the driving chip 303.
The detecting unit 307 includes detecting sub-units M1, M2, M3, M4, M5 corresponding to the data lines 305 one by one. It should be understood by those skilled in the art that the display module is shown only as an example to include 5*6 pixel units 301 arranged in an array, and correspondingly, 5 data lines 305 extend from the driving chip 303, so that the number of the detection subunits is 5, but this is not limitative, and the number of the detection subunits in practical application is different according to the number of the data lines 305, so as to ensure that each data line 305 is correspondingly provided with one detection subunit. In addition, for convenience of description, hereinafter, when distinction is not required, the detection subunit is denoted as detection subunit M.
Specifically, each of the detection sub-units M includes a first end electrically connected to the first signal pin Switch of the driving chip 303, a second end electrically connected to the corresponding data line 305, and a third end electrically connected to the second signal pin CTA of the driving chip 303. The first signal pin Switch and the second signal pin CTA may be driver chip pins reserved at design time, and are driver chip pins for crack detection of the data line. The first signal pin Switch is connected with a first end of the detection subunit for outputting a control signal. The detection subunit M conducts the second terminal and the third terminal in response to the control signal accessed by the first signal pin Switch of the driving chip 303, and forms a detection channel with the data line 305 and the driving chip 303.
The detection subunit M may be a thin film transistor. It will be appreciated by those skilled in the art that the detection unit 307 is disposed in the display panel in each layer of the display module, and the present application is not particularly limited, as similar to the arrangement of the transistors in the pixel driving circuit.
In this embodiment, the driving chip 303 drives each data line 305 according to a preset first mode, and detects the corresponding data line 305 according to the detection signal of the detection subunit M of each detection channel accessed by the second signal pin CTA. It should be understood by those skilled in the art that, because each detection subunit M of the embodiment of the present application is simultaneously connected to the first signal connection pin Switch, it is necessary to make the driving chip 303 sequentially output high-level signals to the corresponding data lines at a certain timing sequence, that is, to implement detection on each data line, and the mode of sequentially outputting high-level signals to the data lines is the preset first mode.
As shown in fig. 4, the driving chip 303 includes a detection device including a comparator 313 and a memory 323.
The comparator 313 includes a first input terminal Vcta, a second input terminal Vref, and an output terminal. The first input end Vcta is connected to the detection signal transmitted by the second signal pin CTA, the second input end is connected to the first comparison threshold, the comparator 313 compares the detection signal with the first comparison threshold and outputs a comparison result, the detection of the corresponding data line 305 is completed through the comparison of the comparator 313, and the output end outputs the comparison result to the memory 323.
Specifically, the detection subunit M is assumed to be an N-channel transistor. When the data line corresponding to the detection subunit M1 is detected, the first signal pin Switch of the driving chip is connected to a control signal with a high level, and in response to the control signal, when the signal output by the driving chip drives the data line corresponding to the detection subunit M1 to be at the high level, other data lines receive the low level signal, only the detection subunit M1 is turned on, if no crack exists in the data line corresponding to the detection subunit M1, the voltage drop from the driving chip 303 to the data line 305 to the detection subunit M1 to the second signal pin CTA is small, for example, generally less than 2V, and then a first comparison threshold vref=vh-2V is set, wherein Vh is the high level input by the data line. The detection signal accessed by the second signal pin CTA is certainly larger than a first comparison threshold value under the condition that the data line is not cracked, and the output result of the comparator is high level; if the data line corresponding to the detection subunit M1 has a crack, the voltage drop from the driving chip 303 to the data line 305 to the detection subunit M1 and then to the second signal pin CTA increases significantly, and reaches 4-5V, even the detection signal accessed from the second signal pin CTA drops to 0V directly, because the first comparison threshold is vref=vh-2V, and if the data line has a crack, the detection signal accessed from the second signal pin CTA is smaller than the first comparison threshold, and the output result of the comparator is low level. Thus, with the above arrangement, the output of the comparator 313 outputs a high level corresponding to the detection result that the data line does not have a crack, and the output of the comparator 313 outputs a low level corresponding to the detection result that the data line does not have a crack, so that the detection of the corresponding data line is realized by the comparator 313.
The memory 323 is used for storing the comparison result of each data line. Optionally, the memory 323 is a RAM, and is used to temporarily store the comparison result output by the comparator 313 when the data line 305 is detected. The comparison result may be one time or a plurality of times, and the memory 323 may be configured to store a plurality of comparison results when it is necessary to make the obtained detection result more accurate and complex. The storage capacity of the memory 323 may be set to ensure that the comparison result of the required number of times can be stored. For example, if the two comparison results need to be stored, the resolution of the display screen is 1080×2340, and one column of pixel units corresponds to two data lines, the storage capacity of the memory 323 should be greater than or equal to 4×1080.
Alternatively, the driver chip 303 outputs the comparison result in the memory 323 in response to an external instruction, for example, reads the comparison result based on a read instruction, which may instruct directly reading a binary or hexadecimal value composed of the comparison result of each bit corresponding to the respective data line, according to the comparison result of the data line corresponding to each bit represented by the value. The read instruction may also instruct reading the comparison result stored with the numbered bit corresponding to each data line. In addition, the display module may further include an indicator, such as an indicator light, for indicating the comparison result.
In the above manner, by setting the detection unit 307, a detection channel is formed based on the control signal accessed by the first signal pin Switch, and the driving chip 303 is caused to drive each data line according to the preset first mode, so that crack detection can be performed on each data line more easily and accurately, and the method has a wide application prospect.
In the embodiment of the application, the display module can be applied to a display module of a non-full screen, namely, a display module without a bending part, and also can be applied to a full screen display module, namely, a display module with a bending part.
As shown in fig. 5, which is an exemplary cross-sectional view of the display module of the embodiment of fig. 3 from the edge of the display area to the lower edge of the display screen in a bent state when applied to the full-screen display module, it should be noted that fig. 5 is intended to describe a possible arrangement of the detection unit in a non-display area, and does not show the detection unit.
In addition, the display module shown in fig. 3 includes a display area 309 and a non-display area surrounding the display area 309, and the detecting unit 307 may be disposed in the display area 309 or in the non-display area.
When the detection unit 307 is disposed in the display area 309, although the complexity of the display area wiring may be increased, this may increase the length of the data line participating in crack detection to the maximum extent, increasing the detection range. However, when the display module according to the embodiment of the present application is intended to be applied to a full-screen display module, crack detection of the data line at the bent portion is often more concerned. Considering that the pixel driving circuits are disposed in the pixel unit 301 in the display area 309, any newly added wiring will affect the design space of the original pixel driving circuits, and in this case, it is uneconomical to dispose the detecting unit in the display area 309.
Preferably, in fig. 5, a point a represents a center line of the bent portion of the display module after bending, and the detecting unit 307 is disposed at a position 300um outside the lower edge of the display area 309 to about 800um away from the point a. Further preferably, the detection unit 307 is disposed at a position 600um outside the lower edge of the display area 309.
The structure and function of the display module provided by the embodiment of the invention are described in detail above with reference to fig. 3 to 6, and the embodiment of the invention also provides a detection method using the display module, as shown in fig. 7, which includes:
s1, a first signal pin of a driving chip outputs a control signal, so that each detection subunit of a detection unit, a data line and the driving chip form a detection channel;
s2, driving each data line by the driving chip according to a preset first mode;
and S3, the driving chip detects corresponding data lines respectively according to detection signals of detection subunits of the detection channels accessed by the second signal pins.
In this embodiment, the detection unit disposed between the pixel unit and the driving chip in the display module is utilized, and the detection subunit is enabled to form a detection channel in response to the control signal accessed by the driving chip, and based on the driving of the data lines in the preset mode, the detection channel is utilized to realize the accurate detection of each data line, so that the product yield is improved, the production cost is reduced, the product reliability is improved, and in addition, the difficulty of later detection can be reduced, so that the detection device has a wide application prospect.
The following describes a detection method of a display module according to an embodiment of the present invention with reference to fig. 3, and for convenience of description, it is assumed that a first end of each detection subunit of the display module receives a control signal of a high level, and forms a complete detection path from a data line to a second signal pin CTA when the level of a corresponding data line is high.
When the maintenance and detection are needed before or after the display module leaves the factory, the detection method of the embodiment can be applied to detect the cracks of the data line of the display module. When the driver chip 303 receives an external command to be detected, the display module enters a detection mode. After entering the detection mode, whether the display screen displays normally can be determined, if the display screen is in the normal display mode, an external command for entering the detection mode is issued again, and if the display screen is not in the normal display mode, the next step is entered, so that the display mode and the detection process are prevented from interfering with each other, and normal detection is prevented from being influenced.
Specifically, in step S1, the first signal pin Switch of the driving chip 303 outputs a control signal, and when the control signal is at a high level, each detection subunit M of the detection unit forms a detection channel with the data line and the driving chip.
In step S2, the driving chip 303 drives each data line according to a preset first mode. Specifically, in the preset first mode, each data line may be driven with reference to the timing signal shown in fig. 7, for example.
Specifically, as shown in connection with fig. 4, the driving chip 303 includes a detection device including a comparator 313 and a memory 323, the comparator 313 including a first input terminal Vcta, a second input terminal Vref, and an output terminal.
Driving each data line according to the preset first mode at the driving chip 303 further includes the following steps.
The driving chip 303 connects the second signal pin CTA to the first input Vcta of the comparator 313 and the voltage signal having the first comparison threshold to the second input Vref of the comparator 313.
The driving chip 303 sets the output frequency of each data line to a first frequency, sets the input voltage of each data line to a first voltage, and drives each data line according to a preset timing. The first frequency may be a frame rate of the display module to be detected in a normal mode, for example, if the frame rate of the display module in the normal mode is 60Hz, the first frequency is set to 60Hz. As shown in fig. 7, high-level signals are sequentially output to the data lines corresponding to the detection sub-units M1 to M5 at times T1 to T5, respectively. Since the first ends of the respective detection sub-units M1 to M5 are all connected to the first signal pin Switch of the driving chip 303 and the third ends are all connected to the second signal pin CTA, crack detection of the respective data lines can be accomplished by sequentially driving the respective data lines.
In step S3, the driving chip 303 detects the corresponding data lines according to the detection signals of the detection subunits of the detection channels accessed by the second signal pins CTA.
Specifically, the control comparator compares the detection signals of the detection subunits of the detection channels accessed by the second signal pins CTA with a first comparison threshold value and outputs a comparison result. At time T1 in fig. 7, the driving chip 303 applies a high level signal, for example, 6.8V, to the data line corresponding to the detecting subunit M1, and applies a low level signal, for example, 0V, to the other data lines, only the detecting subunit M1 is turned on, and if there is no crack in the data line corresponding to the detecting subunit M1, the voltage drop from the driving chip 303 to the data line 305 to the detecting subunit M1 to the second signal pin CTA is small, for example, generally less than 2V, and the first comparison threshold vref=vh-2V is set, where Vh is a high level input to the data line. The detection signal accessed by the second signal pin CTA is certainly larger than a first comparison threshold value under the condition that the data line is not cracked, and the output result of the comparator is high level; if the data line corresponding to the detection subunit M1 has a crack, the voltage drop from the driving chip 303 to the data line 305 to the detection subunit M1 and then to the second signal pin CTA increases significantly, and reaches 4-5V, even the detection signal accessed from the second signal pin CTA drops to 0V directly, because the first comparison threshold is vref=vh-2V, and if the data line has a crack, the detection signal accessed from the second signal pin CTA is smaller than the first comparison threshold, and the output result of the comparator is low level.
The control comparator 313 then outputs the comparison result to the memory 323 through the output terminal, and the memory 323 stores the comparison result of the data line.
According to the first driving mode shown in fig. 7, each data line is driven, one comparison result is stored in the memory 323 every time a comparison result is obtained, for example, 1 is written into a storage bit corresponding to the data line when the comparison result is at a high level, 0 is written into a storage bit corresponding to the data line when the comparison result is at a low level, and one crack detection for each data line is completed when the comparison result of all data lines is obtained by driving the data lines according to a preset first mode.
Alternatively, retests may be performed as appropriate in order to make the detection result more accurate. For example, in the case where the presence of a crack is detected, retest is performed to confirm. When retest is performed, each data line is driven again, for example, each data line is driven according to a preset second mode, and corresponding data lines are detected respectively according to detection signals of detection subunits of each detection channel accessed by the second signal pin CTA. That is, the driving chip connects the second signal pin CTA to the first input terminal Vcta of the comparator 313, and connects the voltage signal having the second comparison threshold to the second input terminal Vref of the comparator 313; the driving chip sets the output frequency of each data line as a second frequency, sets the input voltage of each data line as a second voltage and drives each data line according to a preset time sequence. The second frequency and the second voltage may be different from or the same as those used in the first detection, and are not particularly limited. The retest process is similar to the above test process and will not be repeated here.
In the present embodiment, at the time of multiplexing, the second voltage is set to the maximum output voltage, for example, the second voltage is set to be equal to the high-level voltage signal VGH, so that the detection condition is more severe, thereby improving the detection accuracy.
Thus, with the above arrangement, the output of the comparator 313 outputs a high level corresponding to the detection result that the data line does not have a crack, and the output of the comparator 313 outputs a low level corresponding to the detection result that the data line does not have a crack, so that the detection of the corresponding data line is realized by the comparator 313.
The driving chip 303 outputs the comparison result in the memory 323 in response to an external instruction, for example, reads the comparison result based on a read instruction, which may instruct to directly read a binary or hexadecimal numerical value composed of the comparison result of each bit corresponding to the respective data line, according to the comparison result of the data line corresponding to each bit represented by the numerical value. The read instruction may also instruct reading the comparison result stored with the numbered bit corresponding to each data line. In addition, the display module may further include an indicator, such as an indicator light, for indicating the comparison result.
In the above manner, by setting the detection unit 307, a detection channel is formed based on the control signal accessed by the first signal pin Switch, and the driving chip 303 is caused to drive each data line according to the preset first mode, so that crack detection can be performed on each data line more easily and accurately, and the method has a wide application prospect.
In some alternative embodiments, before the first signal pin of the driving chip outputs the control signal, so that each detection subunit of the detection unit forms a detection channel with the data line and the driving chip, the detection method further includes:
the first signal pin of the driving chip outputs a control signal according to a preset excitation time threshold value, so that each detection subunit of the detection unit, the data line and the driving chip form an excitation loop; the driving chip excites each data line according to a preset third mode.
Specifically, the process of making the control signal conduct the second end and the third end and form an excitation loop with the data line and the driving chip is a process of making the signal corresponding to the data line 305 output according to the highest refresh frequency of the driving chip 305 by the driving chip 305 issuing a command.
In the preset third mode, the driving chip connects the second signal pin CTA to a third voltage, for example, to the low-level power signal line VGL of the gate driving circuit (GOA), and the low level of the low-level power signal line VGL is typically negative, for example, -7V, and the low-level power signal line VGL is set to a limit value, for example, -10V; the driving chip 303 sets the output frequency of each data line to a third frequency, that is, outputs a signal to the data line 305 at the highest frame rate supported by the chip, for example, for an OLED panel having a frame rate of 180Hz and a resolution of 1080 x 2340, the signal period t=1/180 Hz/2340 row Σ2.37us output to the data line 305, and the signal drives each data line 305 as shown in fig. 8. The signal output by the driving chip 303 to the data line 305 is a high-level fourth voltage, the low-level power supply signal line VGL electrically connected with the second signal pin CTA is-10V, the detection subunit M is turned on, a large current is formed from the driving chip 303 to the data line 305 to the detection subunit M to the second signal pin CTA to the low-level power supply signal line VGL, the time length is an excitation time threshold value by working under high frequency and large current for a certain time, and the metal part serving as the data line 305 expands under the thermal effect of the large current, wherein micro cracks of the micrometer (10 um) magnitude deform and deteriorate and amplify to solve the hidden trouble of leakage detection and improve the detection accuracy.
The threshold of the firing time is not particularly specified, and is, for example, typically 10 minutes, to ensure that the micro-cracks in the data line 305 are sufficiently deformed and deteriorated to be amplified.
By enabling each detection subunit of the detection unit to conduct the second end and the third end in response to the control signal and form an excitation loop with the data line and the driving chip before crack detection is carried out on each data line, micro cracks in the data line can be deformed, degraded and amplified, and the accuracy of crack detection of the data line is further improved.
Based on the same inventive concept, the embodiment of the invention also provides a display device, which comprises the display module set described in the above embodiment. The foregoing embodiments are also applicable to the display device provided in this embodiment, and will not be described in detail in this embodiment. The display device can be any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame or a navigator.
Another embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements: the first signal pin of the driving chip outputs a control signal, so that each detection subunit of the detection unit, the data line and the driving chip form a detection channel; the driving chip drives each data line according to a preset first mode; the driving chip detects corresponding data lines respectively according to detection signals of detection subunits of the detection channels accessed by the second signal pins.
In practical applications, the computer-readable storage medium may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this embodiment, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
As shown in fig. 9, another embodiment of the present invention provides a schematic structural diagram of a computer device. The computer device 12 shown in fig. 9 is merely an example and should not be construed as limiting the functionality and scope of use of embodiments of the present invention.
As shown in fig. 9, the computer device 12 is in the form of a general purpose computing device. Components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, a bus 18 that connects the various system components, including the system memory 28 and the processing units 16.
Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, and a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include Industry Standard Architecture (ISA) bus, micro channel architecture (MAC) bus, enhanced ISA bus, video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
Computer device 12 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by computer device 12 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 30 and/or cache memory 32. The computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from or write to non-removable, nonvolatile magnetic media (not shown in FIG. 9, commonly referred to as a "hard disk drive"). Although not shown in fig. 9, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In such cases, each drive may be coupled to bus 18 through one or more data medium interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored in, for example, memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 42 generally perform the functions and/or methods of the embodiments described herein.
The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the computer device 12, and/or any devices (e.g., network card, modem, etc.) that enable the computer device 12 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 22. Moreover, computer device 12 may also communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, such as the Internet, through network adapter 20. As shown in fig. 9, the network adapter 20 communicates with other modules of the computer device 12 via the bus 18. It should be appreciated that although not shown in fig. 9, other hardware and/or software modules may be used in connection with computer device 12, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
The processor unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, for example, to implement a detection method using a display module according to an embodiment of the present invention.
Aiming at the existing problems at present, the invention establishes a display module, a display device, a detection method, a storage medium and computer equipment, and sets a detection unit comprising a plurality of detection subunits between a pixel unit and a driving chip in the display module, and the detection subunits form a detection channel in response to a control signal accessed by the driving chip, so that the detection channel is utilized to realize accurate detection of each data line based on driving of the data line in a preset mode, thereby improving the yield of products, reducing the production cost, improving the reliability of the products, reducing the difficulty of later detection and having wide application prospect.
It should be understood that the foregoing examples of the present invention are provided merely for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention, and that various other changes and modifications may be made therein by one skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (10)
1. A display module is characterized by comprising pixel units, driving chips, data lines and detection units, wherein the pixel units and the driving chips are arranged in an array, the data lines extend from the driving chips to the pixel units respectively, and the detection units are arranged between the pixel units and the driving chips
The detection unit comprises a plurality of detection subunits corresponding to the data lines one by one, and each detection subunit comprises a first end, a second end and a third end, wherein the first end is electrically connected with a first signal pin of the driving chip, the second end is electrically connected with the corresponding data line, and the third end is electrically connected with a second signal pin of the driving chip;
the detection subunit responds to a control signal accessed by a first signal pin of the driving chip to conduct the second end and the third end, and forms a detection channel with the data line and the driving chip;
the driving chip drives each data line according to a preset first mode, and respectively detects the corresponding data lines according to detection signals of detection subunits of each detection channel accessed by the second signal pin, so that detection of each data line is realized, and a mode of sequentially outputting high-level signals to the data lines is the preset first mode;
The display module comprises a bending part arranged between the pixel unit and the driving chip, and the detection unit is arranged between the pixel unit and the bending part;
the driving chip comprises a detection device, wherein the detection device comprises a comparator and a memory, and the detection device comprises a driving circuit, a driving circuit and a driving circuit, wherein the driving circuit comprises a driving circuit
The comparator comprises a first input end, a second input end and an output end, wherein the first input end is connected with a detection signal transmitted by the second signal pin, and the second input end is connected with a preset first comparison threshold value; the comparator compares the detection signal with the first comparison threshold value and outputs a comparison result, and the comparison result is output to the memory through the output end;
the memory is used for storing at least one comparison result of each data line;
and under the condition that the existence of cracks is detected, retesting is carried out to confirm, the driving chip drives each data line according to a preset second mode, and corresponding data lines are respectively detected according to detection signals of detection subunits of each detection channel connected with the second signal pin.
2. The display module of claim 1, wherein the display module comprises a display area and a non-display area, and the detection unit is disposed in the display area or the non-display area.
3. The display module assembly of claim 1, wherein the display module assembly comprises,
the driving chip responds to an external instruction to output each comparison result in the memory; or alternatively
The display module further comprises an indicator for indicating the comparison result.
4. A display device comprising a display module according to any one of claims 1-3.
5. A detection method using the display module set according to any one of claims 1 to 3, comprising:
the first signal pin of the driving chip outputs a control signal, so that each detection subunit of the detection unit, the data line and the driving chip form a detection channel;
the driving chip drives each data line according to a preset first mode;
the driving chip respectively detects corresponding data lines according to detection signals of detection subunits of each detection channel accessed by the second signal pin;
the driving chip comprises a detection device, wherein the detection device comprises a comparator and a memory, and the comparator comprises a first input end, a second input end and an output end;
the driving chip drives each data line according to a preset first mode further comprises:
the driving chip connects the second signal pin to the first input end of the comparator, and connects a preset first comparison threshold to the second input end of the comparator;
The driving chip sets the output frequency of each data line as a first frequency, sets the input voltage of each data line as a first voltage and drives each data line according to a preset time sequence;
the driving chip detecting the corresponding data lines according to the detection signals of the detection subunits of the detection channels accessed by the second signal pins, respectively, further comprises:
controlling the comparator to compare according to the detection signal and a first comparison threshold value and outputting a comparison result;
the comparator is controlled to output the comparison result to the memory through the output end, and the memory stores the comparison result of each data line at least once;
after the driving chip detects the corresponding data lines according to the detection signals of the detection subunits of the detection channels accessed by the second signal pins, the detection method further comprises:
the driving chip drives each data line according to a preset second mode, and detects the corresponding data line according to detection signals of detection subunits of each detection channel accessed by the second signal pin.
6. The method of claim 5, wherein the driving the data lines by the driving chip according to the predetermined second mode further comprises:
The driving chip connects the second signal pin to the first input end of the comparator, and connects a preset second comparison threshold to the second input end of the comparator;
the driving chip sets the output frequency of each data line as a second frequency, sets the input voltage of each data line as a second voltage and drives each data line according to a preset time sequence.
7. The method according to claim 5, wherein before the first signal pin of the driving chip outputs the control signal so that each detection subunit of the detection unit forms a detection channel with the data line and the driving chip, the method further comprises:
the first signal pin of the driving chip outputs a control signal according to a preset excitation time threshold value, so that each detection subunit of the detection unit, the data line and the driving chip form an excitation loop;
the driving chip excites each data line according to a preset third mode.
8. The method of claim 7, wherein the driving chip activating each data line according to a predetermined third mode further comprises:
the driving chip connects the second signal pin to a third voltage;
The driving chip sets the output frequency of each data line to be a third frequency and sets the input voltage of each data line to be a fourth voltage.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any of claims 5-8.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any of claims 5-8 when the program is executed by the processor.
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