CN105070238A - LED module light-out detection circuit, LED module and light-out detection method thereof - Google Patents
LED module light-out detection circuit, LED module and light-out detection method thereof Download PDFInfo
- Publication number
- CN105070238A CN105070238A CN201510454045.0A CN201510454045A CN105070238A CN 105070238 A CN105070238 A CN 105070238A CN 201510454045 A CN201510454045 A CN 201510454045A CN 105070238 A CN105070238 A CN 105070238A
- Authority
- CN
- China
- Prior art keywords
- resistance
- led module
- led
- module
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The present invention relates to an LED module light-out detection circuit, an LED module and a light-out detection method of the LED module. The LED module light-out detection circuit comprises a module display driving circuit for the driving control of multiple LED lamp points, a current measurement circuit which is electrically connected between a power supply voltage input end and the modular display driving circuit and is used for measuring the operating current value of the display module driving circuit, and a microprocessor which is electrically connected to the current measurement circuit and is used for obtaining and temporarily storing the operating current value measured by the current measurement circuit when the LED module carries out light-out detection and outputting the temporarily stored operating current value. According to the LED module light-out detection circuit, the LED module and the light-out detection method, the light-out detection is realized through adding the current measurement circuit and the microprocessor, the module display driving module does not need a special LED driving chip with a light-out detection function, as long as the LED driving chip can normally light a screen body, the cost can be reduced, and system wire connection can be simplified.
Description
Technical field
The present invention relates to LED display control technology field, particularly a kind of LED module becomes blind the blind lamp method for detecting of lamp circuit for detecting, a kind of LED module and a kind of LED module.
Background technology
LED module (or claiming LED lamp panel) is the elementary cell of composition LED display, and each LED module forms its multiple basic display pixel by multiple lines and multiple rows LED point.If certain LED point failure causes lamp point to become blind in LED module, the display effect of LED display will be affected.In a lot of application scenario, need that lamp is become blind to the fault of LED display and detect, convenient replacing in time or maintenance.
Existing blind lamp error detection scheme is: LED module uses the LED drive chip specifically with blind lamp error detection function, sending specific steering order by control system according to the requirement of LED drive chip allows LED drive chip enter error detection mode of operation, the whether blind lamp data of the LED point that each passage drives are exported according to the order of sequence after initiating detection by LED drive chip, this misdata all turns back to control system by afterbody LED module via monitor card or other approach usually, and by control system by each passage of the every a string LED drive chip on each LED module when the error-detection result data back of LED point of front wheel driving is to upper computer software, upper computer software utilize these data simultaneously cooperated with LED driving chip each drive each LED point physical relationship (or claiming cabling mode) on passage and LED module to parse the position that LED module becomes blind lamp, and present to user by interface.
As from the foregoing, existing blind lamp error detection scheme needs to adopt the special LED drive chip with blind lamp detecting function, and cost is high; In addition, the blind lamp detecting result data in existing scheme needs all to turn back to control system by afterbody LED module via monitor card or other approach, causes system line complicated.
Summary of the invention
Therefore, for deficiency of the prior art, the present invention proposes the blind lamp method for detecting that a kind of LED module becomes blind lamp circuit for detecting, a kind of LED module and a kind of LED module.
Particularly, a kind of LED module that the embodiment of the present invention proposes becomes blind lamp circuit for detecting, is suitable for being applied to LED module.Described LED module is become blind lamp circuit for detecting and is comprised: module displays driving circuit, for the multiple LED point of drived control; Current measurement circuit, is connected electrically between power voltage input terminal and described module displays driving circuit, for measuring the working current value of described module displays driving circuit; And microprocessor, be electrically connected described current measurement circuit, the described working current value measured for obtaining described current measurement circuit when carrying out the detecting of blind lamp to LED module is also kept in and is exported by temporary working current value.
In one embodiment of the invention, described current measurement circuit comprises sampling resistor, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, operational amplifier and analog to digital converter; The first end of described sampling resistor and the second end are electrically connected described power voltage input terminal and described module displays driving circuit respectively; Described first resistance and the second resistance to be serially connected between the described first end of described sampling resistor and preset potential and node between the first input end of described operational amplifier described first resistance of electrical connection and the second resistance; Described 3rd resistance and the 4th resistance to be serially connected between described second end of described sampling resistor and the output terminal of described operational amplifier and node between the second input end described 3rd resistance of electrical connection of described operational amplifier and the 4th resistance; The described output terminal of described operational amplifier is also electrically connected the input end of described analog to digital converter; And the output terminal of described analog to digital converter is electrically connected described microprocessor.
In one embodiment of the invention, described microprocessor is configured with first serial and second serial, described first serial is used for carrying out serial communication to export described temporary working current value to described front-end equipment with the front-end equipment of described LED module, and described second serial is for carrying out serial communication with the described microprocessor on LED module described in another.
In addition, a kind of LED module that the embodiment of the present invention proposes, comprising: circuit board and the module displays driving circuit, current measurement circuit, microprocessor and the multiple LED point that are arranged on described circuit board.Described module displays driving circuit is used for multiple LED point described in drived control.Described current measurement circuit is connected electrically between power voltage input terminal and described module displays driving circuit, for measuring the working current value of described module displays driving circuit.Described microprocessor is electrically connected described current measurement circuit, and the described working current value measured for obtaining described current measurement circuit when carrying out the detecting of blind lamp to LED module is also kept in and exported by temporary working current value.
In one embodiment of the invention, the described current measurement circuit in above-mentioned LED module comprises sampling resistor, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, operational amplifier and analog to digital converter; The first end of described sampling resistor and the second end are electrically connected described power voltage input terminal and described module displays driving circuit respectively; Described first resistance and the second resistance to be serially connected between the described first end of described sampling resistor and preset potential and node between the first input end of described operational amplifier described first resistance of electrical connection and the second resistance; Described 3rd resistance and the 4th resistance to be serially connected between described second end of described sampling resistor and the output terminal of described operational amplifier and node between the second input end described 3rd resistance of electrical connection of described operational amplifier and the 4th resistance; The described output terminal of described operational amplifier is also electrically connected the input end of described analog to digital converter; And the output terminal of described analog to digital converter is electrically connected described microprocessor.
In one embodiment of the invention, described microprocessor in above-mentioned LED module is configured with first serial and second serial, described first serial is used for carrying out serial communication to export described temporary working current value to described front-end equipment with the front-end equipment of described LED module, and described second serial is for carrying out serial communication with the described microprocessor on LED module described in another.
In addition, the blind lamp method for detecting of a kind of LED module that the embodiment of the present invention proposes, wherein said LED module comprises the module displays driving circuit for the multiple LED point of drived control.Described blind lamp method for detecting comprises step: (i) utilizes test pattern to drive described module displays driving circuit according to a LED point in the bright described multiple LED point of the every secondary control point of preset order until described multiple LED point was all lighted once by control; (ii) working current value of described module displays driving circuit during the bright described LED point of every secondary control point is measured, to obtain the corresponding multiple working current values controlled one by one when lighting described multiple LED point; (iii) described multiple working current value is temporarily stored on described LED module; And temporary described multiple working current value is uploaded to host computer by (iv).
As from the foregoing, the embodiment of the present invention realizes the detecting of blind lamp by increase current measurement circuit and microprocessor, module displays driver module, without the need to having the LED drive chip of blind lamp detecting function specially, as long as LED drive chip energy normal point bright screen body, can reduce costs; In addition, blind lamp detecting result data, without the need to all turning back to control system by afterbody LED module via monitor card or other approach, makes system line simple.
By the detailed description below with reference to accompanying drawing, other side of the present invention and feature become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present invention, this is because it should with reference to additional claim.Should also be appreciated that, unless otherwise noted, unnecessaryly draw accompanying drawing to scale, they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is the module diagram that a kind of LED module of the embodiment of the present invention becomes blind lamp circuit for detecting.
The particular circuit configurations that Fig. 2 is current measurement circuit shown in Fig. 1 and annexation schematic diagram.
Fig. 3 is the structural representation of a kind of LED module of the embodiment of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
Refer to Fig. 1, a kind of LED module that the embodiment of the present invention provides is become blind lamp circuit for detecting 10 and is comprised: current measurement circuit 11, module displays driving circuit 13 and microprocessor 15.
Wherein, current measurement circuit 11 electric connection of power supply voltage input end Vin be electrically connected module displays driving circuit 13 and microprocessor 15; Current measurement circuit 11 is for gathering the working current value of module displays driving circuit 13.Microprocessor comprises two-way serial ports such as UART (UniversalAsynchronousReceiver/Transmitter, UART Universal Asynchronous Receiver Transmitter) serial ports, serial ports 1 is for being electrically connected front-end equipment such as receiving card, and serial ports 2 becomes blind lamp circuit for detecting for being electrically connected rear end equipment such as rear class LED module; Be understandable that, if do not have rear class LED module to become blind lamp circuit for detecting, then can consider to dispense serial ports 2.In addition, serial ports 1 and serial ports 2 if full duplex mode, then comprise two signal wire TX and RX, as shown in Figure 1; Also can be half-duplex mode, then only need a signal wire.Microprocessor 15 in the present embodiment can be MCU (MicrocontrollerUnit, microcontroller), CPLD (ComplexProgrammableLogicDevice, CPLD) or FPGA (FieldProgrammableGateArray, field programmable gate array) etc.
Refer to Fig. 2, it illustrates a kind of particular circuit configurations of the current measurement circuit 11 in Fig. 1.As shown in Figure 2, current measurement circuit 11 comprises: sampling resistor RS, resistance R1-R4, analog to digital converter ADC and operational amplifier COMP.
The first end electric connection of power supply voltage input end Vin of sample circuit Rs, the power end of the second end electrical connection module displays driving circuit 13, thus the supply voltage inputted from power voltage input terminal Vin is by providing operating voltage to module displays driving circuit 13 after sampling resistor Rs.In addition, sampling resistor Rs is generally the very little precision resister of resistance.Resistance R1 and R2 to be serially connected between the described first end of sampling resistor Rs and earthing potential (preset potential) GND and node between non-inverting input (+) the electric connection resistance R1 of operational amplifier COMP and R2.Resistance R3 and R4 is serially connected between described second end of sampling resistor Rs and the output terminal of operational amplifier COMP, and the node between inverting input (-) the electric connection resistance R3 of operational amplifier COMP and R4.The output terminal of operational amplifier COMP is also electrically connected the input end of analog to digital converter ADC, and the output terminal of analog to digital converter ADC electrical connection microprocessor 15; Thus the voltage of operational amplifier COMP to sampling resistor Rs two ends is exported to analog to digital converter ADC after amplifying and is carried out analog to digital conversion, microprocessor 15 reads the value after analog to digital conversion, going out to flow through the electric current of sampling resistor Rs according to the enlargement factor of operational amplifier COMP and the computing the resistor value of sampling resistor RS, is also the working current value of module displays driving circuit 13.Be understandable that, the major function demand of the current measurement circuit 11 of the present embodiment is the working current value of measurement module display driver circuit 13 and carries out analog to digital conversion, therefore can meet under this major function demand prerequisite, those skilled in the art can adopt other similar current measurement circuits.
Refer to Fig. 3, LED module shown in employing Fig. 1 that it is the embodiment of the present invention becomes blind the structural representation of the LED module (or claiming LED lamp panel) of lamp circuit for detecting 10.As shown in Figure 3, LED module 30 comprises: circuit board 37 and be arranged on current measurement module 11 on circuit board 37, module displays driving circuit 13, microprocessor 15 and multiple LED point R, G, B.Typically, current measurement module 11, module displays driving circuit 13 and microprocessor 15 are arranged on the side of circuit board 37, and multiple LED point R, G, B are arranged on the opposite side of circuit board 37.In addition, described multiple LED point is not limited to redness (R), green (G) and blue (B) lamp point, such as list/dual-colored LED display screen, it only may comprise a kind of color LED point or two kinds of color LED points; Certainly, described multiple LED point also may comprise four kinds and above color LED point.In the present embodiment, described multiple LED point R, G, B accept the drived control of module displays driving circuit 13 to carry out image display and the detecting of blind lamp.
Hold above-mentioned, the course of work that the employing LED module of the present embodiment becomes blind the LED module 30 of lamp circuit for detecting 10 is as follows:
A the upper level control module (being generally receiving card) of () LED module 30 has serial communication protocol with the microprocessor 15 on LED module 30.When multiple LED module 30 cascade uses, namely two serial ports (also serial ports 1 and serial ports 2) due to the microprocessor 15 on each LED module 30 are connected front end receiver card or prime LED module and rear class LED module respectively, microprocessor 15 on LED module 30 can realize the cascaded transmission of serial data by program, thus described upper level control module can access the microprocessor 15 of each LED module 30.
B () is when needs spot check (or claiming blind lamp detecting), be black by upper computer software production background, the test pattern (this test pattern also can be produced by control system) of the LED lamp point inside a LED pixel is lighted in 30 controls of each LED module, control system is (for LED display synchronous control system, it comprises sending card and receiving card) send instruction to the microprocessor 15 on each LED module 30, notice microprocessor 15 reads the working current value of module displays driving circuit 13 when this LED point is lighted in control that current measurement circuit 11 measures, and keep in microprocessor 15 inside.Then shown each LED point of each LED pixel in LED module 30 in a certain order, and read by microprocessor 15 and keep in each LED lamp point at the working current value controlling LED module when lighting.The last microprocessor 15 sent instructions to by host computer on each LED module 30, reads the working current of module displays driving circuit 13 corresponding when each LED is bright by independent reference mark on the firm LED module 30 recorded of microprocessor 15.If certain LED point is blind lamp, when it will be allowed to light, the working current value of the module displays driving circuit 13 of its correspondence must be less than specific threshold, can judge the whether blind lamp of each LED point according to this principle.Afterwards, upper computer software calculates the position of blind lamp in each LED module 30 according to cabling mode, and presents to user by interface.
In sum, the embodiment of the present invention realizes the detecting of blind lamp by increase current measurement circuit and microprocessor, module displays driver module is without the need to having the LED drive chip of blind lamp detecting function specially, also the LED drive chip namely in module displays driving circuit 13 can not have blind lamp detecting function (also namely putting checking functions), as long as LED drive chip energy normal point bright screen body, can reduce costs; In addition, blind lamp detecting result data, without the need to all turning back to control system by afterbody LED module via monitor card or other approach, makes system line simple.
So far, apply specific case herein and LED module of the present invention is become blind to the principle of the blind lamp method for detecting of lamp circuit for detecting, LED module and LED module and embodiment is set forth, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention; all will change in specific embodiments and applications; in sum, this description should not be construed as limitation of the present invention, and protection scope of the present invention should be as the criterion with appended claim.
Claims (7)
1. a LED module becomes blind lamp circuit for detecting (10), be suitable for being applied to LED module (30) and comprise module displays driving circuit (13), described module displays driving circuit (13) is for the multiple LED point (R, G, B) of drived control; It is characterized in that, described LED module is become blind lamp circuit for detecting (10) and is also comprised:
Current measurement circuit (11), is connected electrically between power voltage input terminal (Vin) and described module displays driving circuit (13), for measuring the working current value of described module displays driving circuit (13);
Microprocessor (15), be electrically connected described current measurement circuit (11), for obtaining the described working current value that described current measurement circuit (11) is measured when carrying out the detecting of blind lamp to LED module (30) and the working current value output of keeping in and will keep in.
2. LED module as claimed in claim 1 becomes blind lamp circuit for detecting (10), it is characterized in that, described current measurement circuit (11) comprises sampling resistor (Rs), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), operational amplifier (COMP) and analog to digital converter (ADC); The first end of described sampling resistor (Rs) and the second end are electrically connected described power voltage input terminal (Vin) and described module displays driving circuit (13) respectively; Described first resistance (R1) and the second resistance (R2) are serially connected between the described first end of described sampling resistor (Rs) and preset potential (GND) and the first input end (+) of described operational amplifier (COMP) is electrically connected node between described first resistance (R1) and the second resistance (R2); Described 3rd resistance (R3) and the 4th resistance (R4) are serially connected between described second end of described sampling resistor (Rs) and the output terminal of described operational amplifier (COMP) and the second input end (-) of described operational amplifier (COMP) is electrically connected node between described 3rd resistance (R3) and the 4th resistance (R4); The described output terminal of described operational amplifier (COMP) is also electrically connected the input end of described analog to digital converter (ADC); And the output terminal of described analog to digital converter (ADC) is electrically connected described microprocessor (15).
3. LED module as claimed in claim 1 becomes blind lamp circuit for detecting, it is characterized in that, described microprocessor (15) is configured with first serial and second serial, described first serial is used for carrying out serial communication to export described temporary working current value to described front-end equipment with the front-end equipment of described LED module (30), and described second serial is used for carrying out serial communication with the described microprocessor (15) on LED module (30) described in another.
4. a LED module (30), the module displays driving circuit (13) comprising circuit board (37) and be arranged on described circuit board (37) and multiple LED point (R, G, B), described module displays driving circuit (13) is for LED point (R, G, B) multiple described in drived control; It is characterized in that, described LED module (30) also comprises:
Current measurement circuit (11), is connected electrically between power voltage input terminal (Vin) and described module displays driving circuit (13), for measuring the working current value of described module displays driving circuit (13);
Microprocessor (15), be electrically connected described current measurement circuit (11), for obtaining the described working current value that described current measurement circuit (11) is measured when carrying out the detecting of blind lamp to LED module (30) and the working current value output of keeping in and will keep in.
5. LED module (30) as claimed in claim 4, it is characterized in that, described current measurement circuit (11) comprises sampling resistor (Rs), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), operational amplifier (COMP) and analog to digital converter (ADC); The first end of described sampling resistor (Rs) and the second end are electrically connected described power voltage input terminal (Vin) and described module displays driving circuit (13) respectively; Described first resistance (R1) and the second resistance (R2) are serially connected between the described first end of described sampling resistor (Rs) and preset potential (GND) and the first input end (+) of described operational amplifier (COMP) is electrically connected node between described first resistance (R1) and the second resistance (R2); Described 3rd resistance (R3) and the 4th resistance (R4) are serially connected between described second end of described sampling resistor (Rs) and the output terminal of described operational amplifier (COMP) and the second input end (-) of described operational amplifier (COMP) is electrically connected node between described 3rd resistance (R3) and the 4th resistance (R4); The described output terminal of described operational amplifier (COMP) is also electrically connected the input end of described analog to digital converter (ADC); And the output terminal of described analog to digital converter (ADC) is electrically connected described microprocessor (15).
6. LED module (30) as claimed in claim 4, it is characterized in that, described microprocessor (15) is configured with first serial and second serial, described first serial is used for carrying out serial communication to export described temporary working current value to described front-end equipment with the front-end equipment of described LED module (30), and described second serial is used for carrying out serial communication with the described microprocessor (15) on LED module (30) described in another.
7. a blind lamp method for detecting for LED module (30), described LED module (30) comprises the module displays driving circuit (13) for the multiple LED point (R, G, B) of drived control; It is characterized in that, described blind lamp method for detecting comprises step:
Test pattern is utilized to drive described module displays driving circuit (13) according to a LED point in the bright described multiple LED point of the every secondary control point of preset order until described multiple LED point was all lighted once by control;
Measure the working current value of described module displays driving circuit (13) during the bright described LED point of every secondary control point, to obtain the corresponding multiple working current values controlled one by one when lighting described multiple LED point;
Described multiple working current value is temporarily stored on described LED module (30); And
Temporary described multiple working current value is uploaded to host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454045.0A CN105070238A (en) | 2015-07-29 | 2015-07-29 | LED module light-out detection circuit, LED module and light-out detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454045.0A CN105070238A (en) | 2015-07-29 | 2015-07-29 | LED module light-out detection circuit, LED module and light-out detection method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105070238A true CN105070238A (en) | 2015-11-18 |
Family
ID=54499591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510454045.0A Pending CN105070238A (en) | 2015-07-29 | 2015-07-29 | LED module light-out detection circuit, LED module and light-out detection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105070238A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107452305A (en) * | 2017-08-17 | 2017-12-08 | 西安易朴通讯技术有限公司 | A kind of current sensing means detected for screen, system and method |
| CN107464511A (en) * | 2017-08-17 | 2017-12-12 | 苏州瑞光电子科技股份有限公司 | A kind of detection circuit of LED display, method and system |
| CN113438064A (en) * | 2021-08-26 | 2021-09-24 | 德氪微电子(深圳)有限公司 | Data transmission method, backboard, display device and computer readable storage medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951715A (en) * | 2010-09-29 | 2011-01-19 | 深圳市中庆微科技开发有限公司 | Method for preventing current fault of light-emitting diode lamps |
| CN102036444A (en) * | 2010-10-15 | 2011-04-27 | 深圳市中庆微科技开发有限公司 | Method and device for removing current failure of LED lamp points |
| CN102452352A (en) * | 2010-10-28 | 2012-05-16 | 比亚迪股份有限公司 | Detection and control circuit of LED (light-emitting diode) steering lamps and detection method thereof |
| CN202455609U (en) * | 2012-01-12 | 2012-09-26 | 翁映莲 | Light-emitting diode (LED) gardening lamp with current monitoring device |
| CN203027535U (en) * | 2012-11-23 | 2013-06-26 | 珠海格林赛威科技有限公司 | LED lamp having self-diagnosis and remote monitoring function |
| JP2013257173A (en) * | 2012-06-11 | 2013-12-26 | Ishikawa Seisakusho:Kk | Led failure detecting device |
| CN104795025A (en) * | 2015-04-29 | 2015-07-22 | 西安诺瓦电子科技有限公司 | LED display module and method for detecting states thereof |
| JP2015213028A (en) * | 2014-05-07 | 2015-11-26 | 岩崎電気株式会社 | Power supply device for illumination with power failure compensating function and illumination device |
-
2015
- 2015-07-29 CN CN201510454045.0A patent/CN105070238A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951715A (en) * | 2010-09-29 | 2011-01-19 | 深圳市中庆微科技开发有限公司 | Method for preventing current fault of light-emitting diode lamps |
| CN102036444A (en) * | 2010-10-15 | 2011-04-27 | 深圳市中庆微科技开发有限公司 | Method and device for removing current failure of LED lamp points |
| CN102452352A (en) * | 2010-10-28 | 2012-05-16 | 比亚迪股份有限公司 | Detection and control circuit of LED (light-emitting diode) steering lamps and detection method thereof |
| CN202455609U (en) * | 2012-01-12 | 2012-09-26 | 翁映莲 | Light-emitting diode (LED) gardening lamp with current monitoring device |
| JP2013257173A (en) * | 2012-06-11 | 2013-12-26 | Ishikawa Seisakusho:Kk | Led failure detecting device |
| CN203027535U (en) * | 2012-11-23 | 2013-06-26 | 珠海格林赛威科技有限公司 | LED lamp having self-diagnosis and remote monitoring function |
| JP2015213028A (en) * | 2014-05-07 | 2015-11-26 | 岩崎電気株式会社 | Power supply device for illumination with power failure compensating function and illumination device |
| CN104795025A (en) * | 2015-04-29 | 2015-07-22 | 西安诺瓦电子科技有限公司 | LED display module and method for detecting states thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107452305A (en) * | 2017-08-17 | 2017-12-08 | 西安易朴通讯技术有限公司 | A kind of current sensing means detected for screen, system and method |
| CN107464511A (en) * | 2017-08-17 | 2017-12-12 | 苏州瑞光电子科技股份有限公司 | A kind of detection circuit of LED display, method and system |
| CN107452305B (en) * | 2017-08-17 | 2023-07-14 | 西安易朴通讯技术有限公司 | Current detection device, system and method for screen detection |
| CN113438064A (en) * | 2021-08-26 | 2021-09-24 | 德氪微电子(深圳)有限公司 | Data transmission method, backboard, display device and computer readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100549973C (en) | A kind of usb bus interface detection apparatus and detection method thereof | |
| CN203278835U (en) | Optical module calibration system | |
| US20120161781A1 (en) | Measurement circuit for capacitor | |
| CN105070238A (en) | LED module light-out detection circuit, LED module and light-out detection method thereof | |
| CN104407302A (en) | Automatic testing system for battery equalization module packing | |
| CN201184992Y (en) | System power supply management card and computer host board embedded with the same | |
| CN103983856B (en) | A kind of Low Voltage Differential Signal Interface Matching resistance automatic checkout equipment and method | |
| CN103698691A (en) | Automatic detection calibration device and automatic detection calibration method of electric car bridge board | |
| CN101556757A (en) | Test circuit of display driving circuit | |
| CN103916116A (en) | Interface level switch device | |
| CN105353292A (en) | Automatic detection device of circuit board of electric energy meter | |
| CN110658439A (en) | Test method and system for protection circuit | |
| CN104515946A (en) | Load device for detection | |
| CN105510796A (en) | Automatic tester applied to smart electric meter production line | |
| CN101311740A (en) | Electronic assembly test system | |
| CN101414187B (en) | On-line detection device of control platform | |
| CN204013250U (en) | Voltage conversion device | |
| CN102095997B (en) | Automatic detecting device and method for short-circuit exception of interior circuit and shell of optical module | |
| CN103425561A (en) | VGA interface test device | |
| CN103177697B (en) | A kind of backlight drive circuit and backlight driving method, liquid crystal display | |
| CN214540463U (en) | Relay board for switching and detecting multiple paths of signals | |
| CN104850043A (en) | Microcomputer protection measurement and control device | |
| CN209992650U (en) | Battery wire harness detection circuit | |
| CN108152776A (en) | A kind of portable digital table characteristic measuring device | |
| CN204304165U (en) | Usb adapter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151118 |