CN104575346A - 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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- CN104575346A CN104575346A CN201510044273.0A CN201510044273A CN104575346A CN 104575346 A CN104575346 A CN 104575346A CN 201510044273 A CN201510044273 A CN 201510044273A CN 104575346 A CN104575346 A CN 104575346A
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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 technique field, particularly relate to a kind of detection method and device of organic EL display panel.
Background technology
In existing display panel, organic EL display panel (Organic ElectroluminesecentDisplay, OLED), by means of features such as its low-power consumption, high color saturation, wide viewing angles, becomes the main flow in display field gradually.
Current/voltage brightness (IVL) characteristic detects the whether normal important parameter of display brightness of OLED, by carrying out the test of IVL characteristic to OLED, can detect whether OLED exists faint brightness drift and the heterogeneity phenomenon of the more difficult judgement of human eye.
At present, the method for testing of IVL curve is carried out in laboratory environments, and adopt PR650 type spectral luminosity/colorimeter to test individual OLED, the time needed for test is longer, is about 3min, and, need to carry out specific shading treatment in test process.Said method is only limitted to detect the OLED under laboratory environment, can not detect the OLED under production environment.
Therefore, how providing the detection method of a kind of OLED be applicable under production environment, is the technical matters that those skilled in the art need solution badly.
Summary of the invention
In view of this, embodiments provide a kind of detection method and device of organic EL display panel, in order to provide the detection method of a kind of OLED be applicable under production environment.
Therefore, embodiments provide a kind of detection method of organic EL display panel, comprising:
Loaded the data voltage signal of different numerical value to organic EL display panel by signal generator, detect the current value that described organic EL display panel is corresponding under the data voltage signal of different numerical value, and magnitude of voltage corresponding for the data voltage signal of the current value detected and different numerical value is sent to signal processor;
Gather the display frame of described organic EL display panel under the data voltage signal of different numerical value by color analysis instrument, and the brightness value of the display frame of collection is sent to described signal processor;
Determined the current/voltage brightness curve of described organic EL display panel by described signal processor according to the current value received, magnitude of voltage and brightness value, and judge that whether the display brightness of described organic EL display panel is normal according to the described current/voltage brightness curve determined.
In a kind of possible implementation, in the said method that the embodiment of the present invention provides, before the data voltage signal being loaded different numerical value by signal generator to organic EL display panel, also comprise:
Gathered the display frame of organic EL display panel by image capture device, and the display frame of collection is sent to signal processor;
Tentatively determine that the display gray scale of described organic EL display panel is abnormal by described signal processor according to the display frame received.
In a kind of possible implementation, in the said method that the embodiment of the present invention provides, gather the display frame of described organic EL display panel under the data voltage signal of different numerical value by color analysis instrument, specifically comprise:
After 1s after described signal generator loads each data voltage signal to described organic EL display panel, gather the display frame of described organic EL display panel under each data voltage signal by color analysis instrument.
In a kind of possible implementation, in the said method that the embodiment of the present invention provides, the loading duration of described signal generator to each data voltage signal that described organic EL display panel loads is greater than 1.1s.
In a kind of possible implementation, in the said method that the embodiment of the present invention provides, judge that whether the display brightness of described organic EL display panel is normal according to the described current/voltage brightness curve determined, specifically comprise:
The described current/voltage brightness curve determined and typical curve are compared, judges that whether the display brightness of described organic EL display panel is normal.
The embodiment of the present invention additionally provides a kind of pick-up unit of organic EL display panel, comprising:
Signal generator, for loading the data voltage signal of different numerical value to organic EL display panel, detect the current value that described organic EL display panel is corresponding under the data voltage signal of different numerical value, and magnitude of voltage corresponding for the data voltage signal of the current value detected and different numerical value is sent to signal processor;
Color analysis instrument, for gathering the display frame of described organic EL display panel under the data voltage signal of different numerical value, and sends to signal processor by the brightness value of the display frame of collection;
Signal processor, for determining the current/voltage brightness curve of described organic EL display panel according to the current value received, magnitude of voltage and brightness value, and according to the described current/voltage brightness curve determined, judge that whether the display brightness of described organic EL display panel is normal.
In a kind of possible implementation, in the said apparatus that the embodiment of the present invention provides, also comprising: image capture device, for gathering the display frame of organic EL display panel, and the display frame of collection being sent to signal processor;
Described signal processor, also for determining that whether the display gray scale of described organic EL display panel is normal according to the display frame received.
In a kind of possible implementation, in the said apparatus that the embodiment of the present invention provides, described image capture device is camera.
In a kind of possible implementation, in the said apparatus that the embodiment of the present invention provides, the loading duration of described signal generator to each data voltage signal that described organic EL display panel loads is greater than 1.1s.
In a kind of possible implementation, in the said apparatus that the embodiment of the present invention provides, described signal processor, specifically for the described current/voltage brightness curve determined and typical curve being compared, judges that whether the display brightness of described organic EL display panel is normal.
The detection method of the above-mentioned organic EL display panel that the embodiment of the present invention provides and device, this detection method comprises: load different pieces of information voltage signal by signal generator to organic EL display panel, detect the current value that organic EL display panel is corresponding under different pieces of information voltage signal, and the current value detected and magnitude of voltage corresponding to data voltage signal are sent to signal processor; Color analysis instrument gathers the display frame of organic EL display panel under different pieces of information voltage signal, and the brightness value of the display frame of collection is sent to signal processor; According to the current/voltage brightness curve determined, signal processor according to the current value received, magnitude of voltage and brightness value determination current/voltage brightness curve, and judges that whether the display brightness of organic EL display panel is normal; Said method is not limited to laboratory test environment, also goes for detecting the organic EL display panel under production environment.
Accompanying drawing explanation
Fig. 1 and Fig. 2 is respectively the process flow diagram of the detection method of the organic EL display panel that the embodiment of the present invention provides;
The voltage brightness curve figure that Fig. 3 records for the detection method of organic EL display panel that adopts the embodiment of the present invention to provide respectively and the method for testing of existing current/voltage brightness curve;
The structural representation of the pick-up unit of the organic EL display panel that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the detection method of the organic EL display panel that the embodiment of the present invention provides and the embodiment of device are described in detail.
The detection method of a kind of organic EL display panel that the embodiment of the present invention provides, as shown in Figure 1, comprising:
S101, loaded the data voltage signal of different numerical value to organic EL display panel by signal generator, detect the current value that organic EL display panel is corresponding under the data voltage signal of different numerical value, and magnitude of voltage corresponding for the data voltage signal of the current value detected and different numerical value is sent to signal processor;
S102, gather the display frame of organic EL display panel under the data voltage signal of different numerical value by color analysis instrument, and the brightness value of the display frame of collection is sent to signal processor;
S103, by the current/voltage brightness curve of signal processor according to the current value received, magnitude of voltage and brightness value determination organic EL display panel, and judge that whether the display brightness of organic EL display panel is normal according to the current/voltage brightness curve determined.
The said method that the embodiment of the present invention provides, be not limited to laboratory test environment, also go for detecting OLED under production environment, namely the current/voltage brightness curve of multiple organic EL display panel can automatically be tested, to realize automatically detecting the display brightness of multiple organic EL display panel.
In the specific implementation, performing the step S101 in the said method that provides of the embodiment of the present invention, to be loaded the data voltage signal of different numerical value to organic EL display panel by signal generator before, as shown in Figure 2, can also comprise the steps:
S201, gather the display frame of organic EL display panel by image capture device, and the display frame of collection is sent to signal processor;
S202, by signal processor according to receive display frame tentatively determine that whether the display gray scale of organic EL display panel normal; If so, then step S203 is performed; Otherwise, then step S101 is performed;
S203, next organic EL display panel to be detected.Detect owing to first utilizing the display gray scale of image capture device to organic EL display panel, when determining that the display gray scale of organic EL display panel is abnormal, the current/voltage brightness curve of this organic EL display panel is tested, otherwise can directly detect next organic EL display panel, like this, with the test result of image capture device for foundation, the detection efficiency to the organic EL display panel under production environment can be improved.And, after the current/voltage brightness curve determining organic EL display panel, pay close attention to this organic EL display panel with series-produced organic EL display panel, this batch of organic EL display panel is detected, the detection efficiency to organic EL display panel can be improved further.
In the specific implementation, in the said method that the embodiment of the present invention provides, image capture device generally selects 12K TDI camera, color analysis instrument generally selects CA310 type color analysis instrument, certainly, also can be image capture device and the color analysis instrument of other models, not limit at this.Particularly, the sampling probe of CA310 type color analysis instrument can be arranged on the side of 12K TDI camera, the sampling probe of the motor driving CA310 type color analysis instrument of 12K TDI camera is utilized to move to the assigned address of this organic EL display panel, such as: directly over this organic EL display panel and apart from the position of this organic EL display panel 30mm, like this, by the close fit of CA310 type color analysis instrument and 12K TDI camera, the automatic detection to the organic EL display panel under production environment can be realized.And, the dark surrounds of 12K TDI camera when detecting the display gray scale of organic EL display panel can also be utilized, realize the test to the current/voltage brightness curve of organic EL display panel, thus the restrictive condition of the specific shading treatment in existing current/voltage brightness curve method of testing can be evaded.
In the specific implementation, step S102 in the said method that the embodiment of the present invention provides, the display frame of organic EL display panel under the data voltage signal of different numerical value is gathered by color analysis instrument, realize especially by with under type: after the 1s after signal generator loads each data voltage signal to organic EL display panel, gather the display frame of organic EL display panel under each data voltage signal by color analysis instrument.1s is stopped after signal generator loads each data voltage signal to organic EL display panel, the display frame of organic EL display panel under each data voltage signal can be made to stablize, like this, the accuracy of the brightness value of the display frame that color analysis instrument gathers can be ensured.
In the specific implementation, in the said method that the embodiment of the present invention provides, the time gathering the display frame of organic EL display panel under each data voltage signal due to color analysis instrument is generally 100ms, therefore, generally the loading duration of signal generator to each data voltage signal that organic EL display panel loads is controlled be greater than the scope of 1.1s, like this, time enough can be reserved for color analysis instrument gathers the display frame of organic EL display panel under each data voltage signal.
In the specific implementation, in the said method that the embodiment of the present invention provides, the scope of signal generator to the magnitude of voltage of the data voltage signal that organic EL display panel loads is generally 0V-6V, saltus step interval is generally 0.5V, namely signal generator loads 0.5V successively to organic EL display panel, 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 is greater than 1.1s, like this, can control within 20s the length of testing speech of the current/voltage brightness curve of organic EL display panel, compared with the length of testing speech (3min) of existing PR650 type spectral luminosity/colorimeter, obvious shortening, and, as shown in Figure 3, the current/voltage brightness curve (shown in dotted line as shown in Figure 3) that the said method adopting the embodiment of the present invention to provide records and the current/voltage brightness curve adopting existing PR650 type spectral luminosity/colorimeter to record (shown in solid line as shown in Figure 3) are basically identical, thus it is automatic to achieve the current/voltage brightness curve of the organic EL display panel under production environment, Measurement accuracy, and then can detect the display brightness of the organic EL display panel under production environment, and, test duration obviously shortens.
In the specific implementation, step S103 in the said method that the embodiment of the present invention provides, judge that whether the display brightness of organic EL display panel is normal according to the current/voltage brightness curve determined, specifically can realize in the following manner: the current/voltage brightness curve determined and typical curve are compared, judge that whether the display brightness of organic EL display panel is normal.Particularly, if the difference of the current/voltage brightness curve determined and typical curve is in preset range, then determine that the display brightness of organic EL display panel is normal; If the difference of the current/voltage brightness curve determined and typical curve exceeds preset range, then determine that the display brightness of organic EL display panel is abnormal.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of pick-up unit of organic EL display panel, as shown in Figure 4, comprising:
Signal generator 401, for loading the data voltage signal of different numerical value to organic EL display panel, detect the current value that organic EL display panel is corresponding under the data voltage signal of different numerical value, and magnitude of voltage corresponding for the data voltage signal of the current value detected and different numerical value is sent to signal processor;
Color analysis instrument 402, for gathering the display frame of organic EL display panel under the data voltage signal of different numerical value, and sends to signal processor by the brightness value of the display frame of collection;
Signal processor 403, for the current/voltage brightness curve according to the current value received, magnitude of voltage and brightness value determination organic EL display panel, and according to according to the current/voltage brightness curve determined, judge that whether the display brightness of organic EL display panel is normal.
In the specific implementation, in the said apparatus that the embodiment of the present invention provides, as shown in Figure 4, can also comprise: image capture device 404, for gathering the display frame of organic EL display panel, and the display frame of collection is sent to signal processor 403; Whether then signal processor 403, also for normal according to the display gray scale of the display frame determination organic EL display panel received.
In the specific implementation, in the said apparatus that the embodiment of the present invention provides, image capture device 404 is specifically as follows camera, particularly, the display frame of general selection 12K TDI camera acquires organic EL display panel is to detect the display gray scale of organic EL display panel.
In the specific implementation, in the said apparatus that the embodiment of the present invention provides, the loading duration of each data voltage signal that signal generator 401 pairs of organic EL display panels load is greater than 1.1s, like this, color analysis instrument 402 gathers the display frame of organic EL display panel under each data voltage signal, can carry out after 1s after signal generator 401 pairs of organic EL display panels load each data voltage signal, and, time enough is reserved for color analysis instrument 402 gathers the display frame of organic EL display panel under each data voltage signal.
In the specific implementation, in the said apparatus that the embodiment of the present invention provides, color analysis instrument 402 generally selects CA310 type color analysis instrument, and signal processor 403 is generally PC terminal, and CA310 type color analysis instrument utilizes RS-232 interface to transmit data to PC; Certainly, also can be the color analysis instrument of other models, not limit at this.
In a kind of possible implementation, in the said apparatus that the embodiment of the present invention provides, signal processor 403, specifically for the current/voltage determined brightness curve and typical curve being compared, judges that whether the display brightness of organic EL display panel is normal.Particularly, if the difference of the current/voltage brightness curve determined of signal processor 403 and typical curve is in preset range, then determine that the display brightness of organic EL display panel is normal; If the current/voltage brightness curve that signal processor 403 is determined and the difference of typical curve exceed preset range, then determine that the display brightness of organic EL display panel is abnormal.
The embodiment of the detection method of the above-mentioned organic EL display panel that the concrete enforcement of the pick-up unit of the above-mentioned organic EL display panel that the embodiment of the present invention provides and the embodiment of the present invention provide is similar, repeats part and repeats no more.
The detection method of a kind of organic EL display panel that the embodiment of the present invention provides and device, this detection method comprises: load different pieces of information voltage signal by signal generator to organic EL display panel, detect the current value that organic EL display panel is corresponding under different pieces of information voltage signal, and the current value detected and magnitude of voltage corresponding to data voltage signal are sent to signal processor; Color analysis instrument gathers the display frame of organic EL display panel under different pieces of information voltage signal, and the brightness value of the display frame of collection is sent to signal processor; According to the current/voltage brightness curve determined, signal processor according to the current value received, magnitude of voltage and brightness value determination current/voltage brightness curve, and judges that whether the display brightness of organic EL display panel is normal; Said method is not limited to laboratory test environment, also goes for detecting the organic EL display panel under production environment.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a detection method for organic EL display panel, is characterized in that, comprising:
Loaded the data voltage signal of different numerical value to organic EL display panel by signal generator, detect the current value that described organic EL display panel is corresponding under the data voltage signal of different numerical value, and magnitude of voltage corresponding for the data voltage signal of the current value detected and different numerical value is sent to signal processor;
Gather the display frame of described organic EL display panel under the data voltage signal of different numerical value by color analysis instrument, and the brightness value of the display frame of collection is sent to described signal processor;
Determined the current/voltage brightness curve of described organic EL display panel by described signal processor according to the current value received, magnitude of voltage and brightness value, and judge that whether the display brightness of described organic EL display panel is normal according to the described current/voltage brightness curve determined.
2. the method for claim 1, is characterized in that, before the data voltage signal being loaded different numerical value by signal generator to organic EL display panel, also comprises:
Gathered the display frame of organic EL display panel by image capture device, and the display frame of collection is sent to signal processor;
Tentatively determine that the display gray scale of described organic EL display panel is abnormal by described signal processor according to the display frame received.
3. method as claimed in claim 1 or 2, is characterized in that, gather the display frame of described organic EL display panel under the data voltage signal of different numerical value, specifically comprise by color analysis instrument:
After 1s after described signal generator loads each data voltage signal to described organic EL display panel, gather the display frame of described organic EL display panel under each data voltage signal by color analysis instrument.
4. method as claimed in claim 3, it is characterized in that, the loading duration of described signal generator to each data voltage signal that described organic EL display panel loads is greater than 1.1s.
5. method as claimed in claim 1 or 2, is characterized in that, judges that whether the display brightness of described organic EL display panel is normal, specifically comprise according to the described current/voltage brightness curve determined:
The described current/voltage brightness curve determined and typical curve are compared, judges that whether the display brightness of described organic EL display panel is normal.
6. a pick-up unit for organic EL display panel, is characterized in that, comprising:
Signal generator, for loading the data voltage signal of different numerical value to organic EL display panel, detect the current value that described organic EL display panel is corresponding under the data voltage signal of different numerical value, and magnitude of voltage corresponding for the data voltage signal of the current value detected and different numerical value is sent to signal processor;
Color analysis instrument, for gathering the display frame of described organic EL display panel under the data voltage signal of different numerical value, and sends to signal processor by the brightness value of the display frame of collection;
Signal processor, for determining the current/voltage brightness curve of described organic EL display panel according to the current value received, magnitude of voltage and brightness value, and according to the described current/voltage brightness curve determined, judge that whether the display brightness of described organic EL display panel is normal.
7. device as claimed in claim 6, is characterized in that, also comprises: image capture device, for gathering the display frame of organic EL display panel, and the display frame of collection being sent to signal processor;
Described signal processor, also for determining that whether the display gray scale of described organic EL display panel is normal according to the display frame received.
8. device as claimed in claim 7, it is characterized in that, described image capture device is camera.
9. the device as described in any one of claim 6-8, is characterized in that, the loading duration of described signal generator to each data voltage signal that described organic EL display panel loads is greater than 1.1s.
10. the device as described in any one of claim 6-8, it is characterized in that, described signal processor, specifically for the described current/voltage brightness curve determined and typical curve being compared, judges that whether the display brightness of described organic EL display panel is normal.
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| CN106782235A (en) * | 2016-11-30 | 2017-05-31 | 广州日滨科技发展有限公司 | The abnormal detection method of display screen, device and display device |
| CN109493775A (en) * | 2018-12-20 | 2019-03-19 | 深圳市锐明技术股份有限公司 | Show detection method, device and the terminal device of failure |
| CN110764046A (en) * | 2019-11-28 | 2020-02-07 | 广东电力通信科技有限公司 | Intelligent ammeter LCD fault detection system and method |
| 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 |
| WO2021128543A1 (en) * | 2019-12-27 | 2021-07-01 | 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 in display panel |
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| WO2021128543A1 (en) * | 2019-12-27 | 2021-07-01 | 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 in display panel |
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