CN113270057A - Liquid crystal fault detection method and device - Google Patents
Liquid crystal fault detection method and device Download PDFInfo
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 169
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Abstract
The application provides a liquid crystal fault detection method and device, and relates to the technical field of fault detection. The method comprises the following steps: inputting a first detection command to the segment code type liquid crystal, wherein the first detection command is used for indicating all segments of the segment code type liquid crystal to be displayed; inputting a second detection command to the segment code type liquid crystal, wherein the second detection command is used for indicating that a first segment control pin in any two adjacent segment control pins displays and a second segment control pin does not display; and inputting a third detection command to the segment code type liquid crystal, wherein the third detection command is used for indicating the second segment of control foot to display, and the first segment of control foot does not display. Therefore, the difficulty of manual visual judgment or detection of the AOI video identification system is reduced, and the fault identification rate and the fault identification efficiency are improved.
Description
Technical Field
The application relates to the technical field of fault detection, in particular to a liquid crystal fault detection method and device.
Background
Because the segment code type liquid crystal is easy to cause display faults due to insufficient soldering and continuous soldering (faults of the liquid crystal, liquid crystal pins or driving chip pins and the like) in the production and welding processes, but some display faults are difficult to find in the production process and are taken as qualified products to leave a factory, once a customer finds that the faults are light, money is deducted, and the faults are returned in whole batches, so that uncontrollable economic loss can be caused.
The traditional segment code type liquid crystal detection method screens whether a liquid crystal screen has faults or not by checking different display items or appointing different digital display screens, theoretically, if the quality of all segment positions needs to be detected, an exhaustive method needs to be adopted for searching one by one, and the qualification rate can be guaranteed. But it is obvious that the search mode of the exhaustive method is contradictory to the detection time cost, and the more the search segment bits are, the larger the time cost is, and the lower the failure rate is. With the development of segment code type liquid crystal production technology, the number of displayed liquid crystal segments is more and more, the segment code type liquid crystal segments are more and more complex, the exhaustive search mode inevitably consumes huge production time cost, obviously, the method is not suitable for mass production, so the production can only make trade-off balance between the time cost and the failure rate, the production can be controlled within the operable production time cost, the liquid crystal segments leave the factory with relatively low failure rate, and the real zero failure is difficult to achieve.
Disclosure of Invention
An object of the embodiments of the present application is to provide a method and an apparatus for detecting a liquid crystal failure, so as to solve the technical problem in the prior art that the detection difficulty is high.
In a first aspect, the present invention provides a method for detecting a liquid crystal failure, in which a segment code type liquid crystal is driven by a charge pump driving method, the method including:
inputting a first detection command to the segment code type liquid crystal, wherein the first detection command is used for indicating all segments of the segment code type liquid crystal to be displayed;
inputting a second detection command to the segment code type liquid crystal, wherein the second detection command is used for indicating that a first segment control pin in any two adjacent segment control pins displays and a second segment control pin does not display;
inputting a third detection command to the segment code type liquid crystal, wherein the third detection command is used for indicating the second segment of control foot to display, and the first segment of control foot does not display; therefore, fault screening is performed according to the display states of the segment code type liquid crystal under the first detection command, the second detection command and the third detection command.
In an alternative embodiment, the segment control feet include a com foot and a seg foot.
In an alternative embodiment, the method further comprises:
acquiring a first display image of the segment code type liquid crystal after a first detection command is input;
and if the first display image has incomplete display, determining that the segment code type liquid crystal is in failure.
In an alternative embodiment, the method further comprises:
acquiring a second display image after a second detection command is input into the segment code type liquid crystal;
if any condition of dark display, flower display or non-display exists in the second display image, determining that the segment code type liquid crystal fails;
acquiring a third display image after a segment code type liquid crystal inputs a third detection command;
and if any of dark display, flower display or non-display exists in the third display image, determining that the segment code type liquid crystal is in fault.
In a second aspect, the present invention provides a liquid crystal failure detection device, in which a segment code type liquid crystal is driven by a charge pump driving method, the device comprising:
the first detection module is used for inputting a first detection command to the segment code type liquid crystal, and the first detection command is used for indicating all segments of the segment code type liquid crystal to be displayed;
the second detection module is used for inputting a second detection command to the segment code type liquid crystal, the second detection command is used for indicating that the first segment of control pins in any two adjacent segment of control pins is displayed, and the second segment of control pins is not displayed;
the third detection module is used for inputting a third detection command to the segment code type liquid crystal, the third detection command is used for indicating the second segment of control foot to display, and the first segment of control foot does not display; therefore, fault screening is performed according to the display states of the segment code type liquid crystal under the first detection command, the second detection command and the third detection command.
In an alternative embodiment, the segment control feet include a com foot and a seg foot.
In an alternative embodiment, the method further comprises:
the acquisition module is used for acquiring a first display image after a segment code type liquid crystal inputs a first detection command;
and the determining module is used for determining that the segment code type liquid crystal fails if the first display image has incomplete display.
In an alternative embodiment, the method further comprises:
the acquisition module is used for acquiring a second display image after the segment code type liquid crystal inputs a second detection command;
the determining module is used for determining the fault of the segment code type liquid crystal if any condition of dark display, flower display or non-display exists in the second display image;
the acquisition module is further used for acquiring a third display image after a third detection command is input into the segment code type liquid crystal;
the determining module is further used for determining that the segment code type liquid crystal is in fault if any condition of dark display, flower display or non-display exists in the third display image.
In a third aspect, the present invention provides an electronic device comprising: a processing device and a storage device;
the storage device has stored thereon a computer program which, when executed by a processor, performs a method according to any of the preceding embodiments for camera calibration and/or liquid crystal failure detection.
In a fourth aspect, the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of any of the preceding embodiments.
The embodiment of the invention provides a liquid crystal fault detection method and device. Inputting a first detection command to the segment code type liquid crystal, wherein the first detection command is used for indicating all segments of the segment code type liquid crystal to be displayed; inputting a second detection command to the segment code type liquid crystal, wherein the second detection command is used for indicating that a first segment control pin in any two adjacent segment control pins displays and a second segment control pin does not display; inputting a third detection command to the segment code type liquid crystal, wherein the third detection command is used for indicating the second segment of control foot to display, and the first segment of control foot does not display; therefore, fault screening is performed according to the display states of the segment code type liquid crystal under the first detection command, the second detection command and the third detection command. Adopt odd-even dislocation display mechanism to detect with this realization, in case the liquid crystal base pin has two arbitrary above continuous welding, this trouble table meter is compared with normal table meter, great liquid crystal display deviation can appear, though different chip drive mode display effect can be different, has reduced artifical naked eye judgement, or the degree of difficulty that AOI video identification system detected, has promoted fault identification rate and fault identification's efficiency.
By tracking and counting the data of electric energy meter products, compared with the conventional liquid crystal detection process of batch production, the liquid crystal detection method provided by the invention has the advantages that the production efficiency (only aiming at the liquid crystal screen detection process) is at least improved by 72%, and the liquid crystal failure rate of the factory product is reduced by more than 50%.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is an exemplary electronic device for implementing a liquid crystal failure detection method of an embodiment of the present invention;
FIG. 2 is a flow chart of a method of liquid crystal fault detection according to an embodiment of the invention;
FIG. 3 is an example of a liquid crystal increment table according to an embodiment of the present invention;
FIG. 4 is an example of a liquid crystal image according to an embodiment of the present invention;
FIG. 5 is another example of a liquid crystal add-on table according to an embodiment of the present invention;
FIG. 6 is another example of a liquid crystal image according to an embodiment of the present invention;
FIG. 7 is another example of a liquid crystal add-on table according to an embodiment of the present invention;
FIG. 8 is another example of a liquid crystal image according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a liquid crystal failure detection apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
First, an example electronic device 100 for implementing the liquid crystal failure detection method of the embodiment of the present invention is described with reference to fig. 1.
As shown in FIG. 1, electronic device 100 includes one or more processing devices 102, one or more memory devices 104, an input device 106, and an output device 108, which are interconnected via a bus system 112 and/or other form of connection mechanism (not shown). It should be noted that the components and structure of the electronic device 100 shown in fig. 1 are exemplary only, and not limiting, and that the electronic device may have other components and structures as desired.
The processing device 102 may be a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in the electronic device 100 to perform desired functions.
Storage 104 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. Volatile memory can include, for example, Random Access Memory (RAM), cache memory (or the like). The non-volatile memory may include, for example, Read Only Memory (ROM), a hard disk, flash memory, and the like. One or more computer program instructions may be stored on a computer-readable storage medium and executed by processing device 102 to implement the client functionality (implemented by a processor) of the embodiments of the invention described below and/or other desired functionality. Various applications and various data, such as various data used and/or generated by the applications, may also be stored in the computer-readable storage medium.
The input device 106 may be a device used by a user to input instructions and may include one or more of a keyboard, a mouse, a microphone, a touch screen, and the like.
The output device 108 may output various information (e.g., images or sounds) to the outside (e.g., a user), and may include one or more of a display, a speaker, and the like.
Exemplarily, an exemplary electronic device for implementing the liquid crystal failure detection method according to the embodiment of the present invention may be implemented on a mobile terminal such as a smartphone, a tablet computer, or the like.
It should be noted that the segment code type lcd panel adopts a static driving method, i.e. the driving voltages are continuously applied to the displayed pixel electrodes and the common electrode at the same time until the display time is over. When the device works, a continuous square wave which is opposite to the phase, equal in amplitude and same in frequency on a back electrode (COM pin) is applied to an SEG pin corresponding to a pen segment to be displayed, and the continuous square wave is displayed corresponding to the pen segment; and applying a waveform with the same phase, the same amplitude and the same frequency as those of the back electrode (COM pin) on the SEG pin corresponding to the pen segment not to be displayed, and not displaying the corresponding pen segment.
The common faults of the segment code type liquid crystal include pen-lacking segments, multi-display, and flower display, etc., and the reasons are roughly two points:
firstly, the internal circuit of the liquid crystal is short-circuited or broken due to the defects of the process when the liquid crystal screen is manufactured;
secondly, short circuit or open circuit of the liquid crystal display driving circuit caused by welding failure in the later period when the liquid crystal corresponding product is produced and manufactured;
the invention provides a liquid crystal fault detection method and device. The fault can be detected quickly and accurately, wherein the specific detection modes can include the following three modes:
first, full screen display detection mode: the method is mainly used for detecting the liquid crystal short segment fault, the command control software lights all the segments, and if any segment is not displayed, the fault is judged to be the liquid crystal display fault.
Secondly, an odd screen display detection mode;
third, even screen display detection mode
The odd-even screen display detection mode mainly aims at detecting the fault problems of multi-display, pattern display, dark display and the like of the liquid crystal pen section caused by line short circuit.
The liquid crystal driving circuit is short-circuited, the product can not be identified, and whether a fault exists can be judged only through the display effect of the product in the later period, so that the display difference degree of a fault product and a qualified product is increased, the key of accurate screening is realized, and the odd-even screen display detection is designed for the purpose.
The liquid crystal driving mode generally includes a resistance voltage division driving mode, a charge pump driving mode and the like, when a liquid crystal product has a short circuit fault, the resistance voltage division driving mode is represented by multi-display, multi-display and dark-display, and the charge pump driving mode is represented by non-display (the display difference is large), so that the charge pump driving mode is a good choice for enabling a fault product and a qualified product to have a large display difference.
According to the display driving logic of the segment code type liquid crystal increment table, an odd-even dislocation display mechanism of adjacent segments of com pins and seg pins at different intervals is controlled by commands on software, once any two liquid crystal pins are continuously welded, the conflict of driving output levels of the continuously welded liquid crystal pins can be caused, and larger current power consumption can be generated.
In accordance with an embodiment of the present invention, there is provided an embodiment of a liquid crystal failure detection method, it should be noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that herein.
Fig. 2 is a schematic flow chart of a method for detecting a liquid crystal failure according to an embodiment of the present invention, as shown in fig. 2, the segment code type liquid crystal is driven by a charge pump driving method, and the method may include the following steps:
s210, inputting a first detection command to the segment code type liquid crystal, wherein the first detection command is used for indicating all segments of the segment code type liquid crystal to be displayed.
The segment code liquid crystal can also be called segment code liquid crystal, or segment liquid crystal screen, etc. Segment code liquid crystal is one of liquid crystal products, but in the liquid crystal industry, it is generally called as pattern liquid crystal screen, pen-segment liquid crystal screen, monochrome liquid crystal screen, etc. to distinguish it from dot matrix liquid crystal screen. Taking the liquid crystal example shown in fig. 3 and 4, there are 8 common terminals (com terminal) and 18 control terminals (seg terminal), and if all the terminals are displayed (as shown in fig. 4), 144 segments can be lighted up altogether.
The detection command may refer to some instruction set, each instruction may be used to control one segment control end or common end, etc. At least three instruction sets may be preset, and the at least three instruction sets may include a first instruction set, a second instruction set, and a third instruction set. The first instruction set is used for indicating that all segments of the segment code type liquid crystal are displayed, and the second instruction set and the third instruction set can be used for indicating partial segment display of the segment code type liquid crystal.
The first detection command may be used to implement a full detection mode, and referring to fig. 3 and 4, based on the liquid crystal increment table shown in fig. 3, all segments in the segment code liquid crystal may be controlled to be displayed, and if normal, an image as shown in fig. 4 may be displayed. And if the fault of cold joint, open circuit and open circuit exists, the display is incomplete.
S220, inputting a second detection command to the segment code type liquid crystal, wherein the second detection command is used for indicating that the first segment of the two adjacent segment control pins is displayed, and the second segment of the control pins is not displayed.
The control legs include a com leg and a seg leg.
The second detection command may be used to implement an odd-screen display mode, and referring to fig. 5 and 6, based on the liquid crystal increment table of the odd-screen display mode shown in fig. 5, all the segment odd-screen displays in the segment code liquid crystal may be controlled, and if normal, the image shown in fig. 6 may be displayed. If two adjacent liquid crystal pins are short-circuited, the display is dark, colored or invisible (the charge pump driving mode is invisible).
S230, inputting a third detection command to the segment code type liquid crystal, wherein the third detection command is used for indicating the second segment of control pins to display, and the first segment of control pins do not display; therefore, fault screening is performed according to the display states of the segment code type liquid crystal under the first detection command, the second detection command and the third detection command.
The third detection command may be used to implement the even screen display mode, and referring to fig. 7 and 8, based on the liquid crystal increment table of the even screen display mode shown in fig. 7, all the segment even screen displays in the segment code liquid crystal may be controlled, and if normal, the image shown in fig. 8 may be displayed. If two adjacent liquid crystal pins are short-circuited, the display is dark, colored or invisible (the charge pump driving mode is invisible).
The number of different liquid crystal com pins is different (4 com, 6com and 8com are conventional), the number of seg pins corresponding to a single byte display cache register is different (2 seg pins are conventional 4com and 1 seg pin is conventional 6com and 8com), and when different display modes are driven by software, odd-even dislocation display processing of adjacent pins is required to be carried out according to the actual liquid crystal seg pins, so that the pin short circuit state on actual hardware can be displayed on a liquid crystal display screen for screening.
In some embodiments, the AOI video recognition system detects or manual visual recognition comparison detects, and a fault meter is screened out. Specifically, the method may further include: acquiring a first display image of the segment code type liquid crystal after a first detection command is input; and if the first display image has incomplete display, determining that the segment code type liquid crystal is in failure. Acquiring a second display image after the segment code type liquid crystal inputs a second detection command; and if any of dark display, flower display or non-display exists in the second display image, determining that the segment code type liquid crystal is in fault. Acquiring a third display image after a segment code type liquid crystal inputs a third detection command; and if any of dark display, flower display or non-display exists in the third display image, determining that the segment code type liquid crystal is in fault.
The scheme only aims at the detection of the short-circuit state of two adjacent com pins and seg pins, but the analysis based on the principle can be theoretically expanded to support the detection of the short-circuit state of any two com pins and seg pins, but each time a display mode with different interval numbers is added for display, a certain time is needed to complete fault screening (no matter the detection is performed by an AOI video identification system or the comparison and detection is performed by artificial eye identification), so that comprehensive evaluation is needed during actual production, and a proper detection scheme is selected to ensure the contradiction balance of productivity and fault rate.
By tracking and counting the data of electric energy meter products, compared with the conventional liquid crystal detection process of batch production, the liquid crystal detection method provided by the invention has the advantages that the production efficiency (only aiming at the liquid crystal screen detection process) is at least improved by 72%, and the liquid crystal failure rate of the factory product is reduced by more than 50%.
In the embodiment of the present invention, the logic implementation for different display modes (based on the liquid crystal display driving principle) can be as follows:
defining a two-dimensional array: a [ X ] [ Y ];
wherein X represents the number of liquid crystal COM pins (for example, 8COM pins may be used as shown in fig. 3);
y represents the number of liquid crystal SEG legs (for example, as shown in fig. 3, 18 SEGs may be provided);
for full screen display logic: regardless of the value of X, Y (legal value), all segments of liquid crystal are displayed, and the display effect is not described separately.
For odd display logic: when X in A [ X ] [ Y ] is odd COM foot, the pen segments corresponding to SEG feet with Y being odd are all displayed; when X in A [ X ] [ Y ] is an even number of COM pins, pen segments corresponding to SEG pins with Y being an even number are displayed;
the selected segment display effect is shown in fig. 5.
Even screen display logic: when X in A [ X ] [ Y ] is an odd COM foot, pen segments corresponding to SEG feet with Y being an even number are displayed; when X in A [ X ] [ Y ] is an even COM pin, pen segments corresponding to SEG pins with Y being an odd number are displayed;
the selected segment display effect is shown in fig. 7.
Fig. 9 is a schematic structural diagram of a liquid crystal failure detection apparatus according to an embodiment of the present invention. As shown in fig. 9, the apparatus includes:
a first detection module 901, configured to input a first detection command to the segment code type liquid crystal, where the first detection command is used to instruct all segments of the segment code type liquid crystal to be displayed;
a second detection module 902, configured to input a second detection command to the segment code type liquid crystal, where the second detection command is used to indicate that a first segment of the two adjacent segment control legs displays and a second segment of the two adjacent segment control legs does not display;
a third detection module 903, configured to input a third detection command to the segment code type liquid crystal, where the second detection command is used to indicate that the second segment of control pin is displayed and the first segment of control pin is not displayed; therefore, fault screening is performed according to the display states of the segment code type liquid crystal under the first detection command, the second detection command and the third detection command.
In some embodiments, the segment control feet include a com foot and a seg foot.
In some embodiments, further comprising:
the acquisition module is used for acquiring a first display image after a segment code type liquid crystal inputs a first detection command;
and the determining module is used for determining that the segment code type liquid crystal fails if the first display image has incomplete display.
In some embodiments, further comprising:
the acquisition module is used for acquiring a second display image after the segment code type liquid crystal inputs a second detection command;
the determining module is used for determining the fault of the segment code type liquid crystal if any condition of dark display, flower display or non-display exists in the second display image;
the acquisition module is further used for acquiring a third display image after a third detection command is input into the segment code type liquid crystal;
the determining module is further used for determining that the segment code type liquid crystal is in fault if any condition of dark display, flower display or non-display exists in the third display image.
The device provided by the embodiment of the present invention has the same implementation principle and technical effect as the method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the method embodiments without reference to the device embodiments.
Further, the present embodiment also provides a computer-readable storage medium, on which a computer program is stored, and the computer program is executed by a processor to perform the steps of the method provided by the foregoing method embodiment.
The method and the device for detecting the liquid crystal failure provided by the embodiment of the invention comprise a computer readable storage medium storing a program code, wherein instructions included in the program code can be used for executing the method in the previous method embodiment, and specific implementation can be referred to the method embodiment, and is not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a division of one logic function, and there may be other divisions when actually implemented, and for example, a plurality of 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 of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
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 a plurality of 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.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A liquid crystal fault detection method is characterized in that segment code type liquid crystal is driven in a charge pump driving mode, and the method comprises the following steps:
inputting a first detection command to the segment code type liquid crystal, wherein the first detection command is used for indicating that all segments of the segment code type liquid crystal are displayed;
inputting a second detection command to the segment code type liquid crystal, wherein the second detection command is used for indicating that a first segment of control pins in any two adjacent segment of control pins is displayed, and a second segment of control pins is not displayed;
inputting a third detection command to the segment code type liquid crystal, wherein the third detection command is used for indicating the second segment of control foot to display, and the first segment of control foot does not display; and conveniently carrying out fault screening according to the display states of the segment code type liquid crystal under the first detection command, the second detection command and the third detection command.
2. The method of claim 1, wherein the segment control feet comprise a com foot and a seg foot.
3. The method of claim 1, further comprising:
acquiring a first display image of the segment code type liquid crystal after the first detection command is input;
and if the first display image has incomplete display, determining that the segment code type liquid crystal fails.
4. The method of any one of claims 1-3, further comprising:
acquiring a second display image after the segment code type liquid crystal inputs the second detection command;
if any of dark display, flower display or non-display exists in the second display image, determining that the segment code type liquid crystal fails;
acquiring a third display image after the segment code type liquid crystal inputs the third detection command;
and if any condition of dark display, flower display or non-display exists in the third display image, determining that the segment code type liquid crystal is in fault.
5. The utility model provides a liquid crystal failure detection device which characterized in that, segment code formula liquid crystal adopts the charge pump drive mode to drive, the device includes:
the first detection module is used for inputting a first detection command to the segment code type liquid crystal, and the first detection command is used for indicating that all segments of the segment code type liquid crystal are displayed;
the second detection module is used for inputting a second detection command to the segment code type liquid crystal, wherein the second detection command is used for indicating that a first segment of control pins in any two adjacent segment of control pins is displayed, and a second segment of control pins is not displayed;
the third detection module is used for inputting a third detection command to the segment code type liquid crystal, wherein the third detection command is used for indicating the second segment of control foot to display, and the first segment of control foot does not display; and conveniently carrying out fault screening according to the display states of the segment code type liquid crystal under the first detection command, the second detection command and the third detection command.
6. The apparatus of claim 5, wherein the segment control feet comprise a com foot and a seg foot.
7. The apparatus of claim 5, further comprising:
the acquisition module is used for acquiring a first display image after the segment code type liquid crystal inputs the first detection command;
and the determining module is used for determining that the segment code type liquid crystal fails if incomplete display exists in the first display image.
8. The apparatus of any one of claims 5-7, further comprising:
the acquisition module is used for acquiring a second display image after the segment code type liquid crystal inputs the second detection command;
the determining module is used for determining that the segment code type liquid crystal has faults if any condition of dark display, flower display or non-display exists in the second display image;
the acquisition module is further configured to acquire a third display image after the segment code type liquid crystal inputs the third detection command;
the determining module is further configured to determine that the segment code type liquid crystal is faulty if any of dark display, floating display, or non-display exists in the third display image.
9. An electronic device, comprising: a processing device and a storage device;
the storage device has stored thereon a computer program which, when executed by the processing device, performs the method of any one of claims 1 to 4 for camera calibration and/or liquid crystal failure detection.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of the claims 1 to 4.
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