CN110322820B - Liquid crystal display working state diagnosis device and diagnosis method thereof - Google Patents
Liquid crystal display working state diagnosis device and diagnosis method thereof Download PDFInfo
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- CN110322820B CN110322820B CN201910702899.4A CN201910702899A CN110322820B CN 110322820 B CN110322820 B CN 110322820B CN 201910702899 A CN201910702899 A CN 201910702899A CN 110322820 B CN110322820 B CN 110322820B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 48
- 238000003745 diagnosis Methods 0.000 title claims description 20
- 238000000034 method Methods 0.000 title description 5
- 238000005070 sampling Methods 0.000 claims abstract description 26
- 239000003086 colorant Substances 0.000 claims description 3
- 230000002194 synthesizing effect Effects 0.000 claims description 3
- 238000002405 diagnostic procedure Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
A liquid crystal display operating condition diagnostic device, comprising: the device comprises a data processing module 1, a data processing module 2, a voltage sampling module 1, a voltage sampling module 2, a backlight control signal input interface, a backlight control signal output interface, an LVDS signal input interface and an LVDS signal output interface. The beneficial effects are that: the monitoring module is added to a signal input interface (LVDS interface) and a backlight interface module of the liquid crystal display, and a voltage, current and LVDS data acquisition and conversion unit is added to the monitoring module.
Description
Technical Field
The invention relates to a detection device, in particular to a liquid crystal display working state diagnosis device and a diagnosis method thereof.
Background
The liquid crystal display is an ultrathin planar display device, and is widely used for displaying complex devices such as household appliances, industrial control and medical equipment due to the characteristics of low power consumption, low radiation, space saving, soft picture display and the like. With the wider and wider application of lcd, some problems are paid more and more attention, such as inspection cost and customer complaints caused by the abnormal damage of lcd. At present, the diagnosis modes for whether the liquid crystal display works normally mainly include the following modes: firstly, the working state of the liquid crystal display is monitored in real time by erecting probe equipment; secondly, adding an additional monitoring circuit in the liquid crystal screen; thirdly, refitting the substrate of the liquid crystal display, and adding an additional monitoring circuit; fourthly, a monitoring circuit is added on the display driving main board. The first mode is suitable for occasions with a plurality of liquid crystal display devices in the same area, needs to be manually attended, and is not suitable for real-time monitoring of a single independent liquid crystal display due to cost and real-time reasons; for the second mode, the complexity of the control of the liquid crystal display is increased, and the liquid crystal circuit needs to be modified, so that the liquid crystal display cannot be widely applied; in the third mode, besides adding an additional substrate, the diagnosis content of the liquid crystal display is limited, and only broken screens caused by external physical factors can be diagnosed, but problems caused by abnormal screen driving or backlight circuits cannot be diagnosed; the fourth mode can monitor and diagnose the lcd more comprehensively, but is not capable of changing the motherboard but needs to diagnose the lcd comprehensively.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a diagnostic device for an lcd operating state, so as to achieve the purpose of conveniently and quickly detecting the lcd operating state in real time.
The device comprises a data processing module 1, a data processing module 2, a voltage sampling module 1, a voltage sampling module 2, a backlight control signal input interface, a backlight control signal output interface, an LVDS signal input interface and an LVDS signal output interface, and is characterized in that:
The data processing module 1 is in circuit connection with the data processing module 2 and is used for data processing;
The voltage sampling module 1 is connected with the data processing module 1 and the LVDS signal output interface and is used for collecting LVDS output signal voltage on the LVDS signal output interface;
The voltage sampling module 2 is connected with the data processing module 1 and the LVDS signal output interface and is used for collecting LVDS output current values on the LVDS signal output interface; the voltage sampling module 2 comprises a current/voltage conversion module which is used for converting the current signal of the LVDS signal output by the LVDS signal output interface into a voltage signal;
the backlight control signal input interface is electrically connected with the data processing module 1 and is used for receiving a backlight control signal for controlling the liquid crystal display;
The backlight control signal output interface is electrically connected with the data processing module 1 and is used for outputting control data for directly controlling the backlight of the liquid crystal display;
The LVDS signal input interface is electrically connected with the data processing module 2 and is used for accessing LVDS data for controlling the display content of the liquid crystal display;
the LVDS signal output interface is electrically connected with the data processing module 2 and is used for outputting LVDS data which directly controls the display of the liquid crystal display.
Preferably, the data processing module 1 is a single chip Microcomputer (MCU).
Preferably, the data processing module 2 is a Field Programmable Gate Array (FPGA) chip.
A diagnosis method of a liquid crystal display operating state diagnosis device comprises the following steps:
1) Tuning the diagnostic device to a calibration mode;
2) In the calibration mode, the data processing module 1 modifies the data output to the LVDS signal output interface by the data processing module 2 by setting the value of the GPIO connected to the data processing module 2, so that the liquid crystal displays connected to the LVDS signal output interface respectively display different colors, and the data processing module 1 records the working state values of the liquid crystal displays obtained by the voltage sampling module 1 and the voltage sampling module 2 under each color and takes the values as reference values;
3) Confirming that the reference value is acquired, and enabling the diagnosis device to enter a normal working mode;
4) The data processing module 1 collects LVDS signal state values input by the LVDS signal input interface returned by the data processing module 2 in real time and records the LVDS signal state values as first data; the data processing module 1 acquires the LVDS signal voltage data of the LVDS signal output interface sampled by the voltage sampling module 1 in real time and records the voltage data as second data; the data processing module 1 acquires the LVDS signal current data of the LVDS signal output interface sampled by the voltage sampling module 2 in real time and records the data as third data; the data processing module 1 acquires backlight control signal voltage data sampled by the backlight control signal input interface in real time and records the data as fourth data;
5) Analyzing and comparing the second data and the third data recorded in the step 4) with the reference value obtained in the step two, and synthesizing the first data and the fourth data to judge whether the current working state of the liquid crystal display is normal or not;
6) Feeding back the analysis and diagnosis result in the step 5) to the external equipment through the data interface of the data processing module 1
The invention has the advantages that: the LVDS signal of the liquid crystal display is only subjected to one-time switching, the voltage and the current of the LVDS signal are collected and analyzed, the liquid crystal display is not modified, and equipment for outputting the LVDS signal is not modified functionally or structurally, so that the working state diagnosis device of the liquid crystal display can be connected into liquid crystal displays of different models and sizes, and has universal adaptability; meanwhile, a monitoring module is added to a signal input interface (LVDS interface) and a backlight interface module of the liquid crystal display, and a voltage, current and LVDS data acquisition and conversion unit is added to the monitoring module, so that the difference between the reference value and the running value of the liquid crystal display is analyzed in real time in the process, and whether the working state of the liquid crystal display is normal is diagnosed, therefore, the working state of the liquid crystal display can be diagnosed and fed back in real time, the monitoring range and instantaneity of the parameters of the liquid crystal display are improved, the dependence on the liquid crystal display is reduced, and the use cost is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a flow chart of the diagnosis of the liquid crystal display in fig. 1.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
Specific embodiments of the invention are further described below with reference to the accompanying drawings:
As shown in FIG. 1, a liquid crystal display working state diagnosis device comprises a backlight control signal input interface (1), an LVDS signal input interface (2), a data processing module 1 (3), a data processing module 2 (4), a voltage sampling module 1 (5), a voltage sampling module 2 (6), a backlight control signal output interface (7) and an LVDS signal output signal interface (8), wherein the backlight control signal input interface (1) is used for being connected with control data for controlling backlight of the liquid crystal display, the LVDS signal input interface (2) is used for being connected with LVDS data for controlling display content of the liquid crystal display, the data processing module 1 (3) is a single chip Microcomputer (MCU), the data processing module 2 (4) is a Field Programmable Gate Array (FPGA) chip, the backlight control signal output interface (7) is used for outputting control data for directly controlling backlight of the liquid crystal display, the LVDS signal output interface (8) is used for outputting LVDS data for directly controlling display, the voltage sampling module 1 (5) is used for collecting LVDS output signal voltage on the LVDS signal output interface (8), the voltage sampling module 2 (6) is used for being connected with LVDS signal output interface (8), the voltage sampling module 2 (8) is used for being connected with LVDS signal output interface (8), the current is used for being connected with an LVDS signal output module (2) and the data processing module (1) is used for processing module (1) and the data input module (1) is used for summarizing the data The state data of the current work of the liquid crystal display, which are returned by the voltage sampling module 1 (5) and the voltage sampling module 2 (6), are analyzed and diagnosed, and the diagnosis result is fed back to the outside in real time so as to achieve the purpose of detecting the working state of the liquid crystal display.
As shown in fig. 2, the diagnosis of the state thereof includes the steps of:
Step1, detecting a working mode of the device after the device is electrified, and if the working mode is not in a monitoring mode, entering a calibration mode;
Step 2, in the calibration mode, the data processing module 1 (3) modifies the data output to the LVDS signal output interface (8) by the data processing module 2 (4) by setting the value of the GPIO connected to the data processing module 2 (4), so that the liquid crystal displays connected to the LVDS signal output interface (8) respectively display different colors; the data processing module 1 (3) records the working state values of the liquid crystal display obtained by the voltage sampling module 1 (5) and the voltage sampling module 2 (6) under each color, and takes the values as reference values;
step3, before entering the normal working mode, whether the reference value is acquired or not is confirmed;
Step 4, entering a normal working mode, wherein the data processing module 1 (3) collects the LVDS signal state value input by the LVDS signal input interface (2) returned by the data processing module 2 (4) in real time and records the value as first data; the data processing module 1 (3) acquires the LVDS signal voltage data of the LVDS signal output interface (8) sampled by the voltage sampling module 1 (5) in real time and records the voltage data as second data; the data processing module 1 (3) acquires LVDS signal current data of the LVDS signal output interface (8) sampled by the voltage sampling module 2 (6) in real time and records the data as third data; the data processing module 1 (3) acquires backlight control signal voltage data sampled by the backlight control signal input interface in real time and records the data as fourth data;
Step 5, analyzing and comparing the second data and the third data recorded in the step 4 with the reference value obtained in the step two, and synthesizing the first data and the fourth data to judge whether the current working state of the liquid crystal display is normal or not;
And 6, feeding back the analysis and diagnosis result in the step 5 to the external equipment through the data interface of the data processing module 1 (3).
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A diagnostic method of a liquid crystal display operating state diagnostic device, comprising the steps of:
1) Tuning the diagnostic device to a calibration mode;
2) In a calibration mode, the data processing module 1 modifies data output to an LVDS signal output interface by the data processing module 2 through setting a GPIO value connected to the data processing module 2, so that liquid crystal displays connected to the LVDS signal output interface respectively display different colors, and the data processing module 1 records working state values of the liquid crystal displays obtained by the voltage sampling module 1 and the voltage sampling module 2 under each color and takes the values as reference values;
3) Confirming that the reference value is acquired, and enabling the diagnosis device to enter a normal working mode;
4) The data processing module 1 collects LVDS signal state values input by the LVDS signal input interface returned by the data processing module 2 in real time and records the LVDS signal state values as first data; the data processing module 1 acquires the LVDS signal voltage data of the LVDS signal output interface sampled by the voltage sampling module 1 in real time and records the voltage data as second data; the data processing module 1 acquires the LVDS signal current data of the LVDS signal output interface sampled by the voltage sampling module 2 in real time and records the data as third data; the data processing module 1 acquires backlight control signal voltage data sampled by the backlight control signal input interface in real time and records the data as fourth data;
5) Analyzing and comparing the second data and the third data recorded in the step 4) with the reference value obtained in the step two, and synthesizing the first data and the fourth data to judge whether the current working state of the liquid crystal display is normal or not;
6) And feeding back the analysis and diagnosis result in the step 5) to an external device through a data interface of the data processing module 1.
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| CN110322820B true CN110322820B (en) | 2024-05-17 |
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| CN101950516A (en) * | 2010-09-08 | 2011-01-19 | 佛山市进步科技有限公司 | Detection system of driving plates liquid crystal television and liquid crystal display |
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| WO2015074293A1 (en) * | 2013-11-25 | 2015-05-28 | 深圳市华星光电技术有限公司 | Backlight regulation circuit and liquid crystal display device |
| CN108427481A (en) * | 2018-04-18 | 2018-08-21 | 深圳市嘉利达专显科技有限公司 | A kind of medical display and its automatic fault detection method of automatic fault detection |
| CN208092377U (en) * | 2018-03-26 | 2018-11-13 | 上海明中软件科技有限公司 | A kind of liquid crystal display operation condition detecting system based on power consumption |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090322800A1 (en) * | 2008-06-25 | 2009-12-31 | Dolby Laboratories Licensing Corporation | Method and apparatus in various embodiments for hdr implementation in display devices |
| CN106951208B (en) * | 2017-02-15 | 2020-08-18 | 明基智能科技（上海）有限公司 | Display system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103080720A (en) * | 2010-08-13 | 2013-05-01 | 迪尔公司 | Method and system for performing diagnostics or software maintenance for a vehicle |
| CN101950516A (en) * | 2010-09-08 | 2011-01-19 | 佛山市进步科技有限公司 | Detection system of driving plates liquid crystal television and liquid crystal display |
| WO2015074293A1 (en) * | 2013-11-25 | 2015-05-28 | 深圳市华星光电技术有限公司 | Backlight regulation circuit and liquid crystal display device |
| CN208092377U (en) * | 2018-03-26 | 2018-11-13 | 上海明中软件科技有限公司 | A kind of liquid crystal display operation condition detecting system based on power consumption |
| CN108427481A (en) * | 2018-04-18 | 2018-08-21 | 深圳市嘉利达专显科技有限公司 | A kind of medical display and its automatic fault detection method of automatic fault detection |
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