CN104575346B - Organic ELD (electroluminescent display) panel detection method and device - Google Patents
Organic ELD (electroluminescent display) panel detection method and device Download PDFInfo
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- CN104575346B CN104575346B CN201510044273.0A CN201510044273A CN104575346B CN 104575346 B CN104575346 B CN 104575346B CN 201510044273 A CN201510044273 A CN 201510044273A CN 104575346 B CN104575346 B CN 104575346B
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Abstract
The invention discloses an organic ELD (electroluminescent display) panel detection method and device. The detection method includes that a signal generator loads different data voltage signals to an organic ELD panel, detects corresponding current values of the organic ELD panel under the different data voltage signals and sends the current values detected and voltage values, corresponding to the data voltage signals, to a signal processor; a color analyzer collects corresponding display images of the organic ELD panel under the data voltage signals and sends brightness values of the display images to the signal processor; the signal processor determines current, voltage and brightness curves according to the current values, the voltage values and the brightness values, and judges whether or not the display brightness of the organic ELD panel is normal based on the current, voltage and brightness curves. The organic ELD panel detection method is not limited to the lab test environment and further applicable to detection of the organic ELD panels under mass production.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of detection method of organic EL display panel and dress
Put.
Background technology
In existing display floater, organic EL display panel (Organic Electroluminesecent
Display, OLED) by its low-power consumption, high color saturation, wide viewing angle the features such as, be increasingly becoming the main flow of display field.
Current Voltage brightness (IVL) characteristic is to detect the whether normal important parameter of display brightness of OLED, by right
OLED carries out the test of IVL characteristics, can detect faint brightness drifts and not of the OLED with the presence or absence of the more difficult judgement of human eye
Homogeneous phenomenon.
At present, the method for testing of IVL curves is carried out in laboratory environments, using PR650 types spectral luminosity/colourity
Meter is tested to individual OLED, and the time needed for test is longer, about 3min, also, needs to carry out spy in test process
Fixed shading treatment.Said method is only limitted to detect the OLED under laboratory environment, it is impossible to under production environment
OLED is detected.
Therefore, how a kind of detection method of the OLED suitable under production environment is provided, be those skilled in the art urgently
The technical problem that need to be solved.
The content of the invention
In view of this, a kind of detection method of organic EL display panel and device is embodiments provided,
To provide a kind of detection method of the OLED suitable under production environment.
Therefore, a kind of detection method of organic EL display panel is embodiments provided, including：
The data voltage signal of different numerical value is loaded to organic EL display panel from signal generator, and detection is described
Organic EL display panel corresponding current value under the data voltage signal of different numerical value, and by the current value for detecting
Corresponding magnitude of voltage is sent to signal processor with the data voltage signal of different numerical value；
The organic EL display panel is gathered under the data voltage signal of different numerical value by color analysis instrument
Display picture, and the brightness value of the display picture of collection is sent to into the signal processor；
Determine that the organic electroluminescent shows by the signal processor according to the current value, magnitude of voltage and brightness value that receive
Show the Current Voltage brightness curve of panel, and judge that the organic electroluminescence is sent out according to the Current Voltage brightness curve determined
Whether the display brightness of light display floater is normal.
In a kind of possible implementation, in said method provided in an embodiment of the present invention, by signal generator
Before the data voltage signal of different numerical value is loaded to organic EL display panel, also include：
The display picture of organic EL display panel is gathered by image capture device, and the display picture of collection is sent out
Give signal processor；
The organic EL display panel is primarily determined that according to the display picture for receiving by the signal processor
Show gray scale exception.
In a kind of possible implementation, in said method provided in an embodiment of the present invention, adopted by color analysis instrument
Collect display picture of the organic EL display panel under the data voltage signal of different numerical value, specifically include：
1s after the signal generator loads each data voltage signal to the organic EL display panel
Afterwards, display picture of the organic EL display panel under each data voltage signal is gathered by color analysis instrument.
In a kind of possible implementation, in said method provided in an embodiment of the present invention, the signal generator
1.1s is more than to the loading duration of each data voltage signal of organic EL display panel loading.
In a kind of possible implementation, in said method provided in an embodiment of the present invention, according to the institute for determining
State Current Voltage brightness curve and judge whether the display brightness of the organic EL display panel is normal, specifically includes：
The Current Voltage brightness curve determined is compared with calibration curve, the organic electroluminescent is judged
Whether the display brightness of display floater is normal.
The embodiment of the present invention additionally provides a kind of detection means of organic EL display panel, including：
Signal generator, for loading the data voltage signal of different numerical value, detection to organic EL display panel
The organic EL display panel corresponding current value under the data voltage signal of different numerical value, and by the electricity for detecting
The corresponding magnitude of voltage of data voltage signal of flow valuve and different numerical value is sent to signal processor；
Color analysis instrument, for gathering the organic EL display panel under the data voltage signal of different numerical value
Display picture, and the brightness value of the display picture of collection is sent to into signal processor；
According to the current value, magnitude of voltage and brightness value that receive, signal processor, for determining that the organic electroluminescent shows
Show the Current Voltage brightness curve of panel, and according to the Current Voltage brightness curve determined, judge the organic electroluminescence
Whether the display brightness of light emitting display panel is normal.
In a kind of possible implementation, in said apparatus provided in an embodiment of the present invention, also include：IMAQ
The display picture of collection for gathering the display picture of organic EL display panel, and is sent to signal transacting by equipment
Device；
The signal processor, is additionally operable to determine the organic EL display panel according to the display picture for receiving
Show whether gray scale is normal.
In a kind of possible implementation, in said apparatus provided in an embodiment of the present invention, described image collection sets
Standby is camera.
In a kind of possible implementation, in said apparatus provided in an embodiment of the present invention, the signal generator
1.1s is more than to the loading duration of each data voltage signal of organic EL display panel loading.
In a kind of possible implementation, in said apparatus provided in an embodiment of the present invention, the signal processor,
Specifically for the Current Voltage brightness curve determined is compared with calibration curve, the organic electroluminescent is judged
Whether the display brightness of display floater is normal.
The detection method of above-mentioned organic EL display panel provided in an embodiment of the present invention and device, the detection method
Including：Different pieces of information voltage signal is loaded to organic EL display panel by signal generator, organic electroluminescent is detected
Display floater corresponding current value under different pieces of information voltage signal, and will be the current value for detecting corresponding with data voltage signal
Magnitude of voltage be sent to signal processor；Color analysis instrument gathers organic EL display panel in different pieces of information voltage signal
Under display picture, and the brightness value of the display picture of collection is sent to into signal processor；Signal processor is according to reception
Current value, magnitude of voltage and brightness value determine Current Voltage brightness curve, and are judged according to the Current Voltage brightness curve determined
Whether the display brightness of organic EL display panel is normal；Said method is not limited to laboratory test environment, also may be used
With suitable for detecting to the organic EL display panel under production environment.
Description of the drawings
Fig. 1 and Fig. 2 is respectively the flow process of the detection method of organic EL display panel provided in an embodiment of the present invention
Figure；
Fig. 3 is that the detection method of organic EL display panel provided in an embodiment of the present invention and existing is respectively adopted
The voltage brightness curve figure that the method for testing of Current Voltage brightness curve is measured；
Fig. 4 is the structural representation of the detection means of organic EL display panel provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, the detection method to organic EL display panel provided in an embodiment of the present invention and device
Specific embodiment be described in detail.
A kind of detection method of organic EL display panel provided in an embodiment of the present invention, as shown in figure 1, including：
S101, the data voltage signal for being loaded different numerical value from signal generator to organic EL display panel, inspection
Organic EL display panel corresponding current value under the data voltage signal of different numerical value is surveyed, and by the electric current for detecting
The corresponding magnitude of voltage of data voltage signal of value and different numerical value is sent to signal processor；
S102, by color analysis instrument gather organic EL display panel under the data voltage signal of different numerical value
Display picture, and the brightness value of the display picture of collection is sent to into signal processor；
S103, ORGANIC ELECTROLUMINESCENCE DISPLAYS is determined according to the current value, magnitude of voltage and brightness value that receive by signal processor
The Current Voltage brightness curve of panel, and organic EL display panel is judged according to the Current Voltage brightness curve determined
Display brightness it is whether normal.
Said method provided in an embodiment of the present invention, is not limited to laboratory test environment, it is also possible to suitable for amount
Produce OLED under environment to be detected, you can bent with the Current Voltage brightness for testing automatically multiple organic EL display panels
Line, to realize carrying out automatic detection to the display brightness of multiple organic EL display panels.
In the specific implementation, step S101 in said method provided in an embodiment of the present invention is performed, is occurred by signal
Before device loads the data voltage signal of different numerical value to organic EL display panel, as shown in Fig. 2 can also include as
Lower step：
S201, the display picture for being gathered organic EL display panel by image capture device, and the display that will be gathered
Picture is sent to signal processor；
S202, the display for being primarily determined that organic EL display panel by signal processor according to the display picture for receiving
Whether gray scale is normal；If so, then execution step S203；Otherwise, then execution step S101；
S203, next organic EL display panel is detected.Due to first with image capture device to having
The display gray scale of organic electro luminescent display floater is detected, it is determined that the display gray scale exception of organic EL display panel
When, the Current Voltage brightness curve of the organic EL display panel is tested, otherwise directly the next one can be had
Organic electro luminescent display floater is detected, so, with the test result of image capture device as foundation, can be improved to volume production
The detection efficiency of the organic EL display panel under environment.Also, it is determined that the electric current of organic EL display panel
After voltage brightness curve, pay close attention to the organic EL display panel with series-produced organic EL display panel,
This batch of organic EL display panel is detected, the detection to organic EL display panel can be further improved
Efficiency.
In the specific implementation, in said method provided in an embodiment of the present invention, image capture device is typically chosen 12K
TDI cameras, color analysis instrument are typically chosen CA310 type color analysis instruments, it is of course also possible to be the IMAQ of other models
Equipment and color analysis instrument, here are not limited.Specifically, the sampling probe of CA310 type color analysis instruments can be arranged on
The side of 12K TDI cameras, drives the sampling probe fortune of CA310 type color analysis instruments using the motor of 12K TDI cameras
The specified location of the organic EL display panel is moved, for example：The surface of the organic EL display panel and away from
From the position of organic EL display panel 30mm, so, by CA310 types color analysis instrument and 12K TDI cameras
Close fit, it is possible to achieve the automatic detection to the organic EL display panel under production environment.Also, can be with profit
With dark surrounds of the 12K TDI cameras when the display gray scale to organic EL display panel is detected, it is right to realize
The test of the Current Voltage brightness curve of organic EL display panel, it is bent such that it is able to evade existing Current Voltage brightness
The restrictive condition of the specific shading treatment in wire testing method.
In the specific implementation, step S102 in said method provided in an embodiment of the present invention, is gathered by color analysis instrument
Display picture of the organic EL display panel under the data voltage signal of different numerical value, especially by the following manner reality
It is existing：After 1s after signal generator loads each data voltage signal to organic EL display panel, by color point
Analyzer gathers display picture of the organic EL display panel under each data voltage signal.In signal generator to organic
Electroluminescence display panel stops 1s after loading each data voltage signal, can make organic EL display panel at each
Display picture under data voltage signal is stable, in this manner it is ensured that the brightness value of the display picture of color analysis instrument collection
Accuracy.
In the specific implementation, in said method provided in an embodiment of the present invention, as color analysis instrument gathers Organic Electricity
The time of display picture of the photoluminescence display floater under each data voltage signal is generally 100ms, therefore, typically by signal
The loading duration control of each data voltage signal that generator is loaded to organic EL display panel is more than 1.1s's
Scope, as such, it is possible to be color analysis instrument collection display of the organic EL display panel under each data voltage signal
Picture reserves time enough.
In the specific implementation, in said method provided in an embodiment of the present invention, signal generator is to organic electroluminescent
The scope of the magnitude of voltage of the data voltage signal of display floater loading is generally 0V-6V, and saltus step interval is generally 0.5V, i.e. signal
Generator organic EL display panel is loaded successively 0.5V, 1V, 1.5V, 2V, 2.5V, 3V, 3.5V, 4V, 4.5V, 5V,
The data voltage signal of 5.5V and 6V, the loading duration of each data voltage signal are more than 1.1s, so, to organic electroluminescent
The length of testing speech of the Current Voltage brightness curve of display floater can be controlled within 20s, with existing PR650 types spectral light
The length of testing speech (3min) of degree/colorimeter is compared, hence it is evident that shortened；Also, as shown in figure 3, using provided in an embodiment of the present invention
Current Voltage brightness curve (shown in dotted line as shown in Figure 3) and adopt existing PR650 types spectral light that said method is measured
The Current Voltage brightness curve (as shown in Figure 3 is shown in solid) that degree/colorimeter is measured is basically identical, it is achieved thereby that to volume production
Automatic, the accurate measurement of the Current Voltage brightness curve of the organic EL display panel under environment, and then can be to volume production
The display brightness of the organic EL display panel under environment is detected, also, the testing time substantially shortens.
In the specific implementation, step S103 in said method provided in an embodiment of the present invention, according to the electric current determined
Voltage brightness curve judges whether the display brightness of organic EL display panel is normal, specifically can come in the following manner
Realize：The Current Voltage brightness curve determined is compared with calibration curve, organic EL display panel is judged
Whether display brightness is normal.Specifically, however, it is determined that the Current Voltage brightness curve for going out and the difference of calibration curve are in preset range
It is interior, it is determined that the display brightness of organic EL display panel is normal；If it is determined that Current Voltage brightness curve and standard it is bent
The difference of line exceeds preset range, it is determined that the display brightness exception of organic EL display panel.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of detection dress of organic EL display panel
Put, as shown in figure 4, including：
Signal generator 401, for loading the data voltage signal of different numerical value, inspection to organic EL display panel
Organic EL display panel corresponding current value under the data voltage signal of different numerical value is surveyed, and by the electric current for detecting
The corresponding magnitude of voltage of data voltage signal of value and different numerical value is sent to signal processor；
Color analysis instrument 402, for gathering organic EL display panel under the data voltage signal of different numerical value
Display picture, and the brightness value of the display picture of collection is sent to into signal processor；
Signal processor 403, for determining ORGANIC ELECTROLUMINESCENCE DISPLAYS according to the current value, magnitude of voltage and brightness value that receive
The Current Voltage brightness curve of panel, and the Current Voltage brightness curve determined according to basis, judge that organic electroluminescent shows
Show whether the display brightness of panel is normal.
In the specific implementation, in said apparatus provided in an embodiment of the present invention, as shown in figure 4, can also include：Image
The display picture of collection for gathering the display picture of organic EL display panel, and is sent to letter by collecting device 404
Number processor 403；Then signal processor 403, are additionally operable to determine organic EL display panel according to the display picture for receiving
Display gray scale it is whether normal.
In the specific implementation, in said apparatus provided in an embodiment of the present invention, image capture device 404 is specifically as follows
Camera, specifically, is typically chosen the display picture of 12K TDI cameras collection organic EL display panel with to organic
The display gray scale of electroluminescence display panel is detected.
In the specific implementation, in said apparatus provided in an embodiment of the present invention, signal generator 401 is sent out to organic electroluminescence
The loading duration of each data voltage signal of light display floater loading is more than 1.1s, and so, color analysis instrument 402 gathers organic
Display picture of the electroluminescence display panel under each data voltage signal, can be in signal generator 401 to organic electroluminescence
Light emitting display panel is carried out after loading the 1s after each data voltage signal, also, gathers Organic Electricity for color analysis instrument 402
Display picture of the photoluminescence display floater under each data voltage signal reserves time enough.
In the specific implementation, in said apparatus provided in an embodiment of the present invention, color analysis instrument 402 is typically chosen
CA310 type color analysis instruments, signal processor 403 be generally PC terminals, CA310 types color analysis instrument using RS-232 interface to
PC transmission datas；It is of course also possible to be the color analysis instrument of other models, here is not limited.
In a kind of possible implementation, in said apparatus provided in an embodiment of the present invention, signal processor 403,
Specifically for the Current Voltage determined brightness curve and calibration curve are compared, organic EL display panel is judged
Display brightness it is whether normal.Specifically, if the Current Voltage brightness curve determined of signal processor 403 and calibration curve
Difference is in preset range, it is determined that the display brightness of organic EL display panel is normal；If signal processor 403 determines
The difference of Current Voltage brightness curve and calibration curve exceed preset range, it is determined that organic EL display panel it is aobvious
Show brightness exception.
The detection means of above-mentioned organic EL display panel provided in an embodiment of the present invention is embodied as and this
The embodiment of the detection method of the above-mentioned organic EL display panel that bright embodiment is provided is similar to, and repeats part and no longer goes to live in the household of one's in-laws on getting married
State.
A kind of detection method of organic EL display panel provided in an embodiment of the present invention and device, the detection method
Including：Different pieces of information voltage signal is loaded to organic EL display panel by signal generator, organic electroluminescent is detected
Display floater corresponding current value under different pieces of information voltage signal, and will be the current value for detecting corresponding with data voltage signal
Magnitude of voltage be sent to signal processor；Color analysis instrument gathers organic EL display panel in different pieces of information voltage signal
Under display picture, and the brightness value of the display picture of collection is sent to into signal processor；Signal processor is according to reception
Current value, magnitude of voltage and brightness value determine Current Voltage brightness curve, and are judged according to the Current Voltage brightness curve determined
Whether the display brightness of organic EL display panel is normal；Said method is not limited to laboratory test environment, also may be used
With suitable for detecting to the organic EL display panel under production environment.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (8)
1. a kind of detection method of organic EL display panel, it is characterised in that include：
The display picture of organic EL display panel is gathered by image capture device, and the display picture of collection is sent to
Signal processor；
The display of the organic EL display panel is primarily determined that according to the display picture for receiving by the signal processor
Whether gray scale is normal；
When it is determined that the display gray scale of the organic EL display panel is abnormal, from signal generator to organic electroluminescent
The data voltage signal of the different numerical value of display floater loading, detects number of the organic EL display panel in different numerical value
According to corresponding current value under voltage signal, and by the current value for detecting and the corresponding voltage of data voltage signal of different numerical value
Value is sent to signal processor；Data electricity of the organic EL display panel in different numerical value is gathered by color analysis instrument
Display picture under pressure signal, and the brightness value of the display picture of collection is sent to into the signal processor；By the signal
According to the current value, magnitude of voltage and brightness value that receive, processor determines that the Current Voltage of the organic EL display panel is bright
Write music line, and judge that the display of the organic EL display panel is bright according to the Current Voltage brightness curve determined
Whether degree is normal.
2. the method for claim 1, it is characterised in that the ORGANIC ELECTROLUMINESCENCE DISPLAYS face is gathered by color analysis instrument
Display picture of the plate under the data voltage signal of different numerical value, specifically includes：
After 1s after the signal generator loads each data voltage signal to the organic EL display panel,
Display picture of the organic EL display panel under each data voltage signal is gathered by color analysis instrument.
3. method as claimed in claim 2, it is characterised in that the signal generator is to the ORGANIC ELECTROLUMINESCENCE DISPLAYS face
The loading duration of each data voltage signal of plate loading is more than 1.1s.
4. the method for claim 1, it is characterised in that the Current Voltage brightness curve according to determining judges institute
Whether the display brightness for stating organic EL display panel is normal, specifically includes：
The Current Voltage brightness curve determined is compared with calibration curve, the ORGANIC ELECTROLUMINESCENCE DISPLAYS is judged
Whether the display brightness of panel is normal.
5. a kind of detection means of organic EL display panel, it is characterised in that include：
Image capture device, for gathering the display picture of organic EL display panel, and the display picture of collection is sent out
Give signal processor；
Signal generator, for loading the data voltage signal of different numerical value to organic EL display panel, detection is described
Organic EL display panel corresponding current value under the data voltage signal of different numerical value, and by the current value for detecting
Corresponding magnitude of voltage is sent to signal processor with the data voltage signal of different numerical value；
Color analysis instrument, it is aobvious under the data voltage signal of different numerical value for gathering the organic EL display panel
Show picture, and the brightness value of the display picture of collection is sent to into signal processor；
Signal processor, for primarily determining that the display ash of the organic EL display panel according to the display picture for receiving
Whether degree is normal, determines the electric current of the organic EL display panel according to the current value, magnitude of voltage and brightness value that receive
Voltage brightness curve, and according to the Current Voltage brightness curve determined, judge the organic EL display panel
Display brightness it is whether normal.
6. device as claimed in claim 5, it is characterised in that described image collecting device is camera.
7. the device as described in claim 5 or 6, it is characterised in that the signal generator is aobvious to the organic electroluminescent
Show that the loading duration of each data voltage signal of panel loading is more than 1.1s.
8. the device as described in claim 5 or 6, it is characterised in that the signal processor, specifically for by the institute for determining
State Current Voltage brightness curve to be compared with calibration curve, judge that the display brightness of the organic EL display panel is
It is no normal.
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| CN106782235B (en) * | 2016-11-30 | 2020-10-23 | 日立楼宇技术（广州）有限公司 | Display screen abnormity detection method and device and display screen equipment |
| CN106782236B (en) * | 2016-11-30 | 2020-10-23 | 日立楼宇技术（广州）有限公司 | Display screen device abnormal playing alarm method and device and display screen device |
| CN109493775B (en) * | 2018-12-20 | 2022-06-14 | 深圳市锐明技术股份有限公司 | Display fault detection method and device and terminal equipment |
| CN110764046B (en) * | 2019-11-28 | 2021-08-24 | 广东电力通信科技有限公司 | Intelligent ammeter LCD fault detection system and method |
| CN111354312B (en) * | 2019-12-27 | 2021-04-27 | 深圳市华星光电半导体显示技术有限公司 | OLED efficiency attenuation compensation method, device and system for display panel |
| CN111579903A (en) * | 2020-05-18 | 2020-08-25 | 格力电器（合肥）有限公司 | Display module testing tool and testing method |
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