CN109545135B - Driving method and device of OLED (organic light emitting diode) illuminating screen body - Google Patents
Driving method and device of OLED (organic light emitting diode) illuminating screen body Download PDFInfo
- Publication number
- CN109545135B CN109545135B CN201811484503.5A CN201811484503A CN109545135B CN 109545135 B CN109545135 B CN 109545135B CN 201811484503 A CN201811484503 A CN 201811484503A CN 109545135 B CN109545135 B CN 109545135B
- Authority
- CN
- China
- Prior art keywords
- screen body
- oled lighting
- lighting screen
- reverse
- switch element
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
Abstract
Based on a certain technical scheme in this application, after the trouble takes place, accessible start-up reverse drive voltage mode, promptly: reverse voltage is applied to the OLED lighting screen body, so that pixel points which are about to have problems or pixel points which have problems of the OLED lighting screen body are concentrated to fuse fuses through current, hidden dangers are prevented from appearing before next use, and reliability and user experience of OLED products are improved through the method. Based on another technical scheme in this application, before the trouble takes place, through starting the reverse drive voltage mode, namely: reverse voltage is applied to the OLED lighting screen body, so that the pixels with problems of the OLED lighting screen body are concentrated and fuse wires are fused through current, hidden dangers are prevented from occurring before the OLED lighting screen body is used next time, and reliability and user experience of OLED products are improved through the method.
Description
Technical Field
The present disclosure relates generally to the field of OLED lighting screen technologies, and in particular, to a method and an apparatus for driving an OLED lighting screen.
Background
The basic structure of an Organic Light emitting device (OLED for short) is as follows: an organic light-emitting unit is arranged in a closed space formed by a glass substrate and a packaging cover, the organic light-emitting unit comprises an anode, an organic light-emitting layer, a cathode and other layers, the anode and the cathode are led out by leads at a non-light-emitting area position and bonded with an Integrated Circuit (IC) or a Flexible Printed Circuit (FPC).
The manufacturing process of the OLED screen body inevitably has defect points such as dust particles, burrs, pinholes, cracks and the like, and the distance between the anode and the cathode of the OLED screen body is usually very small (about tens to hundreds of nanometers). As a result, in this state, the anode and the cathode may come into direct contact to cause a defect (referred to as a short-circuit point), or the organic layer between the anode and the cathode may become thinner than other positions. When the OLED device is operated, current tends to pass more from such defective points than from other locations, causing heat to build up at such defective points, resulting in a compromise in the quality and reliability of the overall OLED screen.
The OLED screen body with a fusing type short-circuit prevention structure already exists in the prior art, the short-circuit protection structure is characterized in that a low-resistance fuse is connected in series with a pixel point in the OLED screen body, the fuse is easy to fuse due to heating, once a short-circuit fault occurs, a large amount of current flows through the pixel point of a light emitting area where the short-circuit fault is located and the fuse connected in series, the internal fuse is fused due to heating, and the OLED screen body is protected. Therefore, the utility model has the following characteristics: one is as follows: the fuse has the advantages that the fuse is single-point, the fuse plays a role at the short circuit point, and the fuse is fused to be changed into open circuit from short circuit; the second is that: passive type, need have enough electric current and generate heat and just can fuse, if the electric current is not enough, can't fuse, so this kind of circuit structure can't repair by oneself completely promptly can't guarantee to fuse at every turn, awaits urgent need to improve.
In addition, as the 'connector type short-circuit prevention structure' in the prior art, the short-circuit protection structure is characterized in that a high-resistance connector is connected in series with a sub-light emitting region in an OLED screen body, so that short-circuit current is reduced when a pixel point is short-circuited, the short-circuit current does not exceed 10% of total current, and the short-circuit protection structure is completely opposite to a 'fusing type short-circuit prevention structure', once a short-circuit fault occurs, the short-circuit current can be reduced, and the short-circuit current does not exceed 10% of the total current, and the short-circuit protection structure has the following characteristics: one is as follows: the single-point property is that the connector at the short-circuit point plays a role, and the short-circuit current can be reduced by the connector; the second is that: passive, only when the pixel is short-circuited, the circuit structure can not repair the pixel short-circuited point by itself, and needs to be improved urgently.
Therefore, in order to avoid the occurrence of the failure result of the OLED screen body to the maximum extent, the OLED screen body is subjected to defect screening after the production is completed, and in view of the possibility of certain omission in the screening, a driving circuit needs to be designed to deal with the possible short-circuit defect when the product flows into a client.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a method and an apparatus for driving an OLED lighting panel, especially an OLED lighting panel with a short-circuit prevention structure, which can improve the reliability of the OLED lighting panel compared to the prior art.
In a first aspect, a method for driving an OLED lighting screen includes the following steps:
before starting the OLED lighting screen body, judging whether the OLED lighting screen body has a short-circuit fault or not;
if the short circuit fault occurs, starting a reverse driving voltage mode and maintaining for a certain time;
and judging whether the OLED lighting screen body is normally repaired.
According to the technical scheme provided by the embodiment of the application, the method further comprises the following steps: and if the OLED lighting screen body is judged not to be normally repaired, starting the reverse voltage mode for N times (N is more than or equal to 2).
According to the technical scheme provided by the embodiment of the application, the OLED lighting screen body adopts a fusing type short-circuit prevention structure, and when the voltage of the OLED lighting screen body is smaller than a rated value, a fault is judged.
According to the technical scheme provided by the embodiment of the application, the reverse driving voltage value is 1-10 times of the maximum value of the forward driving voltage.
According to the technical scheme provided by the embodiment of the application, the starting time of the single reverse driving voltage mode is less than or equal to 5 ms.
In a second aspect, a driving method of an OLED lighting screen includes the following steps:
after the OLED lighting screen body is closed;
judging whether the OLED lighting screen body is closed or not;
if it is turned off, the reverse driving voltage mode is started and maintained for a certain time.
According to the technical scheme provided by the embodiment of the application, the reverse driving voltage value is 1-10 times of the maximum value of the forward driving voltage.
According to the technical scheme provided by the embodiment of the application, the starting time of the single reverse driving voltage mode is less than or equal to 5 ms.
In a third aspect, a driving apparatus for an OLED lighting screen includes: the OLED lighting screen comprises a first driving power supply, a forward switching element and an OLED lighting screen body, wherein the forward switching element is electrically connected with the first driving power supply; further comprising: the OLED lighting screen comprises a second driving power supply and a reverse switch element electrically connected with the second driving power supply, wherein the reverse switch element is connected with the OLED lighting screen body; the forward switch element comprises a first forward switch element and a second forward switch element, wherein the output end of the first forward switch element is connected with the anode of the OLED lighting screen body, and the input end of the second forward switch element is connected with the cathode of the OLED lighting screen body; the reverse switch element comprises a first reverse switch element and a second reverse switch element, wherein the output end of the first reverse switch element is connected with the cathode of the OLED lighting screen body, and the input end of the second reverse switch element is connected with the anode of the OLED lighting screen body.
According to the technical scheme provided by the embodiment of the application, the first and second forward switching elements are a PNP type triode Q1 and a triode Q4 respectively; the output end of the first driving power supply is connected with the emitting electrode of the triode Q1, and the collector electrode of the triode Q1 is connected with the anode of the OLED lighting screen body; the cathode of the OLED lighting screen body is connected with the emitter of the triode Q4, and the collector of the triode Q4 is grounded; the first and second reverse switching elements are PNP type triode Q3 and triode Q2; the output end of the second driving power supply is connected with the emitting electrode of the triode Q3, and the collector electrode of the triode Q3 is connected with the cathode of the OLED lighting screen body; the anode of the OLED lighting screen body is connected with the emitter of the triode Q2, and the collector of the triode Q2 is grounded; the bases of the Q1, the Q2, the Q3 and the Q4 are all connected with a control unit.
According to the technical scheme provided by the embodiment of the application, the method further comprises the following steps: and the two ends of the OLED lighting screen body are respectively connected to the input of the voltage comparator, and the output of the voltage comparator is connected to the control unit.
According to the technical scheme provided by the embodiment of the application, four PWM generating devices are arranged in the control unit.
In summary, based on the technical solution of the first aspect, after the fault occurs, the reverse driving voltage mode may be activated, that is: reverse voltage is applied to the OLED lighting screen body, so that pixel points which are about to have problems or pixel points which have problems of the OLED lighting screen body are concentrated to fuse fuses through current, hidden dangers are prevented from appearing before next use, and reliability and user experience of OLED products are improved through the method.
Based on the technical solution of the second aspect, before the fault occurs, the reverse driving voltage mode may be started, that is: before the OLED lighting screen body fails, the OLED lighting screen body is confirmed to be switched to be driven reversely after being closed, so that the pixel points which are possibly short-circuited are fused through reverse current.
Based on the technical scheme of the third aspect, by setting a specific driving circuit structure, the forward-driving OLED lighting screen body and the reverse-driving OLED lighting screen body can be concentrated in the same structure, so that the centralized control is convenient to realize, and by combining the driving methods of the first aspect and the second aspect, the reliability and the user experience of the OLED lighting screen body can be effectively improved through the driving methods of the first aspect and the second aspect.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic workflow diagram according to a first embodiment of the present application;
FIG. 2 is a schematic workflow diagram of a second embodiment of the present application;
fig. 3 is a schematic circuit structure diagram of a third embodiment of the present application;
FIG. 4 is a timing diagram comparing the circuit configuration of FIG. 3;
FIG. 5 is a schematic diagram of a forward driving mode of the circuit configuration of FIG. 3;
FIG. 6 is a schematic diagram of a reverse drive mode of the circuit configuration of FIG. 3;
FIG. 7 is a schematic diagram of a control unit of the circuit configuration of FIG. 3;
fig. 8 is a schematic diagram (voltage comparator) of the structure of the control unit of the circuit arrangement of fig. 3.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The first embodiment is as follows:
please refer to fig. 1 for a driving method of an OLED lighting panel.
The core principle of the driving method of the OLED lighting screen body in this embodiment is as follows: when the OLED lighting screen body fails, the OLED lighting screen body is switched to be in reverse driving, so that pixel points which are possibly short-circuited or pixel points which are short-circuited are respectively fused through reverse current, the driving method is a relief method after the OLED lighting screen body fails, and the method specifically comprises the following steps:
before starting the OLED lighting screen body, judging whether the OLED lighting screen body fails or not; this step is the basic decision for a fault, which is the case of a short circuit fault.
If the fault occurs, starting a reverse driving voltage mode and maintaining for a certain time; and determining a relief method based on the last step, wherein the reverse driving voltage mode is to apply reverse voltage to the OLED lighting screen body by switching the switch action in the OLED lighting screen body driving circuit. Preferably, the reverse driving voltage value is 1-10 times the maximum value of the forward driving voltage.
In order to effectively and safely break down a short-circuit point where a fault has occurred or a fault is about to occur in the reverse driving voltage mode, the reverse driving voltage value may be 1 time of the maximum value of the forward driving voltage.
Considering the principle of short circuit point formation or the difference of sizes, a single rated reverse driving voltage value may not clear all the short circuit points at one time, so the reverse driving voltage value may also be 1.25 times, 1.5 times, 1.75 times, 2 times, 3 times, 5 times, 7 times, 10 times of the maximum value of the forward driving voltage.
Of course, the specific selection needs to be set according to the actual rating of the OLED lighting screen body.
Of course, the value of the reverse driving voltage is greatly affected by the process conditions, and the optimum value is preferably experimentally found.
And judging whether the OLED lighting screen body is normally repaired. In the step, the repair result of the OLED lighting screen body needs to be judged, and the judgment method comprises the following steps: and starting the OLED lighting screen body for testing and judging. If the OLED lighting screen body can be normally started, the OLED lighting screen body is normally repaired; and if the OLED lighting screen body cannot be normally started, judging that the repair is abnormal. Preferably, the OLED lighting screen body adopts a fusing type short-circuit prevention structure, and when the voltage of the OLED lighting screen body is smaller than a rated value, a fault is determined.
The rated value is the rated voltage of the OLED lighting screen body and is related to factors such as the design and the used materials of the screen body.
After a repair is completed, in order to facilitate the continuation of the repair, in any preferred embodiment, the method further comprises the following steps: if the OLED lighting screen body is not normally repaired, the reverse voltage mode is started for N times (N is more than or equal to 2). In this step, when the unrepaired normality occurs, the restoration can be continued by starting the reverse voltage mode N times. The design goal of this step is to take into account the potential for some shorted pixels. Of course, if the normal state cannot be restored after multiple times of starting, the OLED lighting screen body is judged to be invalid.
In order to avoid damage to the OLED lighting screen, in any preferred embodiment, the single-time activation time of the reverse driving voltage mode is less than or equal to 5 ms.
Example two:
please refer to fig. 2, which discloses a driving method of an OLED lighting panel.
The core principle of the driving method of the OLED lighting screen body in this embodiment is as follows: before the OLED lighting screen body fails, switching the OLED lighting screen body into reverse driving after the OLED lighting screen body is confirmed to be closed so as to fuse the pixel points which are possibly short-circuited through reverse current, wherein the driving method is a pre-relief method before the OLED lighting screen body fails, and specifically comprises the following steps:
a driving method of an OLED lighting screen body comprises the following steps:
after the OLED illuminating screen body is started, the OLED illuminating screen body is closed;
judging whether the OLED lighting screen body is closed or not; this step is the basic decision of the screen body, which should be confirmed to be turned off.
If it is turned off, the reverse driving voltage mode is started and maintained for a certain time. And determining a pre-relief method based on the previous step, wherein the reverse driving voltage mode is to apply reverse voltage to the OLED lighting screen body by switching the switch action in the OLED lighting screen body driving circuit. Preferably, the reverse driving voltage value is 1-10 times the maximum value of the forward driving voltage.
In order to avoid damage to the OLED lighting screen, in any preferred embodiment, the single-time activation time of the reverse driving voltage mode is less than or equal to 5 ms.
Example three:
please refer to fig. 3, fig. 4, fig. 5 and fig. 6 for a driving device of an OLED lighting panel.
The drive arrangement of OLED lighting screen body includes: the OLED lighting screen comprises a first driving power supply, a forward switching element and an OLED lighting screen body, wherein the forward switching element is electrically connected with the first driving power supply; further comprising: the OLED lighting screen comprises a second driving power supply and a reverse switch element electrically connected with the second driving power supply, wherein the reverse switch element is connected with the OLED lighting screen body; the forward switch element comprises a first forward switch element and a second forward switch element, wherein the output end of the first forward switch element is connected with the anode of the OLED lighting screen body, and the input end of the second forward switch element is connected with the cathode of the OLED lighting screen body; the reverse switch element comprises a first reverse switch element and a second reverse switch element, wherein the output end of the first reverse switch element is connected with the cathode of the OLED lighting screen body, and the input end of the second reverse switch element is connected with the anode of the OLED lighting screen body.
In the above embodiment, the forward drive circuit includes: the OLED lighting screen comprises a first driving power supply, a forward switch element and an OLED lighting screen body, wherein the forward switch element is electrically connected with the first driving power supply, and the OLED lighting screen body is connected with the forward switch element.
Wherein:
the forward switch element comprises a first forward switch element and a second forward switch element, wherein the output end of the first forward switch element is connected with the anode of the OLED lighting screen body, and the input end of the second forward switch element is connected with the cathode of the OLED lighting screen body;
in the above embodiment, the reverse drive circuit includes: the OLED lighting screen comprises a second driving power supply and a reverse switch element electrically connected with the second driving power supply, wherein the reverse switch element is connected with the OLED lighting screen body.
Wherein:
the reverse switch element comprises a first reverse switch element and a second reverse switch element, wherein the output end of the first reverse switch element is connected with the cathode of the OLED lighting screen body, and the input end of the second reverse switch element is connected with the anode of the OLED lighting screen body. This is the reverse drive mode described in embodiments one and two.
Based on the circuit structure, the state is switched to the forward driving circuit state by closing the first reverse switch and the second reverse switch and simultaneously opening the first forward switch and the second forward switch.
Based on the circuit structure, the state of the reverse driving circuit is switched to by closing the first forward switch and the second forward switch and simultaneously opening the first reverse switch and the second reverse switch.
Based on the above analysis, the circuit structure in this embodiment can be used with the specific driving methods of the first and second embodiments.
Referring to the schematic circuit structure shown in fig. 3, in order to specifically realize the forward driving circuit structure and the reverse driving circuit structure, in any preferred embodiment, the first and second forward switching elements are a PNP transistor Q1 and a transistor Q4, respectively; the output end of the first driving power supply is connected with the emitting electrode of the triode Q1, and the collector electrode of the triode Q1 is connected with the anode of the OLED lighting screen body; the cathode of the OLED lighting screen body is connected with the emitter of the triode Q4, and the collector of the triode Q4 is grounded; the first and second reverse switching elements are PNP type triode Q3 and triode Q2; the output end of the second driving power supply is connected with the emitting electrode of the triode Q3, and the collector electrode of the triode Q3 is connected with the cathode of the OLED lighting screen body; the anode of the OLED lighting screen body is connected with the emitter of the triode Q2, and the collector of the triode Q2 is grounded; the bases of the Q1, the Q2, the Q3 and the Q4 are all connected with a control unit.
Referring to the timing comparison diagram of FIG. 4,
wherein:
the timing diagram at the upper part is a timing state diagram of the OLED lighting screen body;
the lower timing diagram is the timing state diagram of the driving circuit in fig. 3.
The specific analysis with respect to fig. 4 is as follows:
t0-t 1: the product is in a closed state, the output current is 0A, and the driving circuit is not in a use state.
t 1: at the moment, the product switch is opened, and the product is about to start working.
t1-t 2: the circuit outputs back voltage to impact the screen body, and if short-circuit pixel points exist, the short-circuit pixel points are blown, and the driving circuit is shown in fig. 6.
t2-t 3: the circuit outputs a forward current, the screen is normally lit, and the driving circuit is shown in fig. 5.
t 3: and the product switch is closed, the product stops working, and the screen body is extinguished.
t3-t 4: the circuit outputs back voltage to impact the screen body, if there is a short-circuit pixel which is not blown, the short-circuit pixel is blown, and the driving circuit is shown in fig. 6.
Referring to fig. 5, in the above circuit structure, the forward driving circuit includes: the output end of the first driving power supply is connected with the emitting electrode of the triode Q1, and the collector electrode of the triode Q1 is connected with the anode of the OLED lighting screen body; the cathode of the OLED lighting screen body is connected with the emitter of the triode Q4, and the collector of the triode Q4 is grounded.
Referring to fig. 6, in the above circuit structure, the reverse driving circuit includes: the output end of the second driving power supply is connected with the emitting electrode of the triode Q3, and the collector electrode of the triode Q3 is connected with the cathode of the OLED lighting screen body; the anode of the OLED lighting screen body is connected with the emitter of the triode Q2, and the collector of the triode Q2 is grounded.
In order to switch between the forward driving circuit and the backward driving circuit, the bases of Q1, Q2, Q3 and Q4 are all connected to the control unit, please refer to fig. 7. Specifically, the control unit may be: STM32 series single chip microcomputer, concrete model for example STM32F103ZET 6.
Referring to fig. 3 and 8, in any preferred embodiment, the method further includes: and two ends (namely, voltage values at a V1 point and a V2 point) of the OLED lighting screen body are respectively connected to the input end of the voltage comparator, and the output of the voltage comparator is connected to the control unit.
In order to facilitate the monitoring of the voltage of the OLED lighting screen body, the voltage monitoring structure is used as a control unit to judge whether the OLED lighting screen body is in a fault state.
For example:
under normal conditions, the voltage across the OLED lighting screen body is more than 6V. At this time, the output terminal of the voltage comparator inputs a normal feedback signal to the control unit so that the control unit maintains the state of the forward driving circuit.
In the case of a fault, when the OLED lighting screen is short-circuited, the voltage across the OLED lighting screen is about 1V or even lower. At this time, the output terminal of the voltage comparator inputs a failure feedback signal to the control unit so that the control unit switches to a state of the back driving circuit.
Preferably, to facilitate control of Q1, Q2, Q3 and Q4 in the circuit shown in fig. 3 by the control unit, in any preferred embodiment, four PWM generators are provided in the control unit.
The control unit is provided with four PWM generating devices, the output of each PWM generating device is connected with the output of the control unit, and the output ends of the devices of the control unit are respectively connected with the bases of the Q1, the Q2, the Q3 and the Q4.
Under the normal operating condition of the OLED lighting screen body, the PWM generating device is arranged to adjust the brightness of the screen body, namely, the brightness of the screen body can be changed from dark to bright in the lighting process, so that different lighting effects are realized.
When the OLED lighting screen body fails and the control unit controls the driving circuit to be switched to the reverse driving mode, impact repair of a short-circuit point can be realized by changing the frequency of PWM and then changing the driving voltage applied to Q3 and Q2.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (5)
1. A driving method of an OLED lighting screen body is characterized in that: the method comprises the following steps:
before starting the OLED lighting screen body, judging whether the OLED lighting screen body has a short-circuit fault or not;
if the short circuit fault occurs, starting a reverse driving voltage mode and maintaining for a certain time;
judging whether the OLED lighting screen body is normally repaired or not;
the OLED lighting screen body adopts a fusing type short-circuit prevention structure, and when the voltage of the OLED lighting screen body is smaller than a rated value, a fault is judged to occur;
the reverse driving voltage value is 1-10 times of the maximum value of the forward driving voltage;
the starting time of the single reverse driving voltage mode is less than or equal to 5 ms.
2. The method for driving an OLED lighting panel according to claim 1, wherein: also comprises the following steps: and if the OLED lighting screen body is judged not to be normally repaired, starting the reverse voltage mode for N times (N is more than or equal to 2).
3. A drive arrangement of OLED lighting screen body which characterized in that: the method comprises the following steps: the OLED lighting screen comprises a first driving power supply, a forward switching element and an OLED lighting screen body, wherein the forward switching element is electrically connected with the first driving power supply; further comprising: the OLED lighting screen comprises a second driving power supply and a reverse switch element electrically connected with the second driving power supply, wherein the reverse switch element is connected with the OLED lighting screen body;
the forward switch element comprises a first forward switch element and a second forward switch element, wherein the output end of the first forward switch element is connected with the anode of the OLED lighting screen body, and the input end of the second forward switch element is connected with the cathode of the OLED lighting screen body;
the reverse switch element comprises a first reverse switch element and a second reverse switch element, wherein the output end of the first reverse switch element is connected with the cathode of the OLED lighting screen body, and the input end of the second reverse switch element is connected with the anode of the OLED lighting screen body;
further comprising: the two ends of the OLED lighting screen body are respectively connected to the input of the voltage comparator, and the output of the voltage comparator is connected to the control unit;
under the normal condition, the output end of the voltage comparator inputs a normal feedback signal to the control unit so that the control unit maintains the state of the forward driving circuit;
under the condition of a fault, when the OLED lighting screen body is in short circuit, the output end of the voltage comparator inputs a fault feedback signal to the control unit, so that the control unit is switched to be in a state of a reverse driving circuit.
4. The driving device of the OLED lighting screen body as claimed in claim 3, wherein: the first forward switch element and the second forward switch element are a PNP type triode Q1 and a triode Q4 respectively; the output end of the first driving power supply is connected with the emitting electrode of the triode Q1, and the collector electrode of the triode Q1 is connected with the anode of the OLED lighting screen body; the cathode of the OLED lighting screen body is connected with the emitter of the triode Q4, and the collector of the triode Q4 is grounded; the first and second reverse switching elements are PNP type triode Q3 and triode Q2; the output end of the second driving power supply is connected with the emitting electrode of the triode Q3, and the collector electrode of the triode Q3 is connected with the cathode of the OLED lighting screen body; the anode of the OLED lighting screen body is connected with the emitter of the triode Q2, and the collector of the triode Q2 is grounded; the bases of the Q1, the Q2, the Q3 and the Q4 are all connected with a control unit.
5. The driving device of the OLED lighting screen body as claimed in claim 4, wherein: four PWM generating devices are arranged in the control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811484503.5A CN109545135B (en) | 2018-12-06 | 2018-12-06 | Driving method and device of OLED (organic light emitting diode) illuminating screen body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811484503.5A CN109545135B (en) | 2018-12-06 | 2018-12-06 | Driving method and device of OLED (organic light emitting diode) illuminating screen body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109545135A CN109545135A (en) | 2019-03-29 |
| CN109545135B true CN109545135B (en) | 2021-07-20 |
Family
ID=65852952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811484503.5A Active CN109545135B (en) | 2018-12-06 | 2018-12-06 | Driving method and device of OLED (organic light emitting diode) illuminating screen body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109545135B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111369933B (en) * | 2020-03-23 | 2021-08-24 | 京东方科技集团股份有限公司 | Sub-pixel circuit, pixel driving method, display panel and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1533223A (en) * | 2003-03-19 | 2004-09-29 | ��˹���´﹫˾ | Serial and parallel organic light-emitting diode light source |
| CN1638559A (en) * | 2003-12-18 | 2005-07-13 | 株式会社半导体能源研究所 | Display device and manufacturing method thereof |
| CN1822737A (en) * | 2006-03-13 | 2006-08-23 | 信利半导体有限公司 | Organic electroluminescence display and its producing method |
| CN103187025A (en) * | 2011-12-30 | 2013-07-03 | 昆山维信诺显示技术有限公司 | Working circuit used for organic electroluminescence display (OLED) device, relative device, relative equipment and relative method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05313134A (en) * | 1992-05-11 | 1993-11-26 | Sony Corp | Method and device for inspecting liquid crystal display device |
| TW530427B (en) * | 2000-10-10 | 2003-05-01 | Semiconductor Energy Lab | Method of fabricating and/or repairing a light emitting device |
| US7423617B2 (en) * | 2002-11-06 | 2008-09-09 | Tpo Displays Corp. | Light emissive element having pixel sensing circuit |
| JP6708124B2 (en) * | 2014-08-25 | 2020-06-10 | コニカミノルタ株式会社 | Organic electroluminescence module, smart device and lighting device |
| CN108257539B (en) * | 2018-01-19 | 2021-06-29 | 苏州清越光电科技股份有限公司 | OLED display device and driving chip thereof |
| CN207966465U (en) * | 2018-03-23 | 2018-10-12 | 固安翌光科技有限公司 | A kind of OLED lighting screens and its control system |
-
2018
- 2018-12-06 CN CN201811484503.5A patent/CN109545135B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1533223A (en) * | 2003-03-19 | 2004-09-29 | ��˹���´﹫˾ | Serial and parallel organic light-emitting diode light source |
| CN1638559A (en) * | 2003-12-18 | 2005-07-13 | 株式会社半导体能源研究所 | Display device and manufacturing method thereof |
| CN1822737A (en) * | 2006-03-13 | 2006-08-23 | 信利半导体有限公司 | Organic electroluminescence display and its producing method |
| CN103187025A (en) * | 2011-12-30 | 2013-07-03 | 昆山维信诺显示技术有限公司 | Working circuit used for organic electroluminescence display (OLED) device, relative device, relative equipment and relative method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109545135A (en) | 2019-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7042161B1 (en) | Ballast with arc protection circuit | |
| CN101176386B (en) | Two-wire dimmer with power supply and load protection circuit in the event of switch failure | |
| KR101856898B1 (en) | Method for operating an optoelectronic assembly and optoelectronic assembly | |
| CN109545135B (en) | Driving method and device of OLED (organic light emitting diode) illuminating screen body | |
| JP5219255B2 (en) | Light emitting device | |
| JP6346176B2 (en) | Driver circuit between electromagnetic ballast and LED | |
| JP4876452B2 (en) | Lighting device | |
| KR100818009B1 (en) | Manufacturing method of organic el element and manufacturing device of organic el element | |
| JP2007227094A (en) | Panel for lighting using organic el element, and lighting device | |
| JP6502375B2 (en) | Fluorescent lamp compatible type LED lighting device and electric shock protection device therefor | |
| JP5756761B2 (en) | Organic EL lighting device | |
| TW201117344A (en) | Optoelectronic semiconductor chip and method to adapt a contact structure for electrical contacting of an optoelectronic semiconductor chip | |
| JP5742909B2 (en) | Light emitting device and control method thereof | |
| KR20170074569A (en) | Organic light emitting diode display apparatus | |
| CN101392877B (en) | LED lamp strip | |
| KR20120028393A (en) | Method and device for driving an oled device | |
| CN109427994B (en) | Organic photoelectric device | |
| JP5632732B2 (en) | Light emitting diode lighting device and lighting device using the light emitting diode lighting device | |
| JP6366088B2 (en) | Organic EL element repair method, organic EL panel manufacturing method, and light emitting device | |
| US11641099B2 (en) | Arc detection system | |
| JP3101243U (en) | Starter circuit device with safety structure | |
| JP6186887B2 (en) | Lighting device, lighting device, and abnormality detection method for lighting device | |
| CN108448541A (en) | A kind of detecting system of the control loop of electric system disconnecting switch | |
| JP3845944B2 (en) | Electrolytic capacitor aging device | |
| KR200296241Y1 (en) | Monitoring apparatus for checking operation of lamplight in street lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |