CN112509522A - Self-heating driving circuit for AMOLED and heating method and device thereof - Google Patents
Self-heating driving circuit for AMOLED and heating method and device thereof Download PDFInfo
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- CN112509522A CN112509522A CN202011460694.9A CN202011460694A CN112509522A CN 112509522 A CN112509522 A CN 112509522A CN 202011460694 A CN202011460694 A CN 202011460694A CN 112509522 A CN112509522 A CN 112509522A
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- heating
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- amoled
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 47
- 229920001621 AMOLED Polymers 0.000 title claims abstract 13
- 238000000034 method Methods 0.000 title claims description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 239000010408 film Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 3
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 9
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—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]
- G09G3/3225—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] using an active matrix
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
- H05B3/141—Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
Abstract
The invention relates to a self-heating driving circuit for an AMOLED, which comprises: a light emitting module including an OLED light emitting device; the first driving module is connected with the light-emitting module and provides a driving signal; the temperature control module is used for monitoring the temperature of the light emitting module; and the second driving module is connected between the first driving module and the anode of the light-emitting module, receives a signal of the temperature control module, adjusts the voltage of the first driving module, and enables the resistance film above the light-emitting module to start or stop heating. The beneficial effects are that: on the basis of the existing design, the self-heating function is realized by adding a bias transistor fixed on an OLED pin and adjusting the voltage through a first driving module and a second driving module, the AMOLED micro-display is applied in a wider temperature range (-50 ℃ to 70 ℃), and the existing design complexity is not improved, external elements are not added, or the reduction of the pixel size is not limited.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a self-heating driving circuit for an AMOLED and a heating method and device thereof.
Background
A large variation in temperature below 0 ℃ of an Organic Light Emitting Display (OLED) device significantly changes its current-voltage characteristics. This is currently achieved by applying the required bias voltages to all pixels and connecting to zero potential on the silicon substrate, which enables the ability to use AMOLED microdisplay chips over a wide temperature range (-50 to 70 ℃), but increases design complexity, adds additional external components, and prevents further reduction of pixel size.
Disclosure of Invention
The invention provides a self-heating driving circuit for an AMOLED (active matrix/organic light emitting diode), and a heating method and a heating device thereof, which are used for solving the problems that in the prior art, the application of bias voltage to a pixel causes design complexity, the size of the pixel is increased and the like.
The technical problem solved by the invention is realized by adopting the following technical scheme:
a self-heating drive circuit for an AMOLED, comprising:
a light emitting module including an OLED light emitting device;
the first driving module is connected with the light-emitting module and provides a driving signal;
the temperature control module is used for monitoring the temperature of the light emitting module;
and the second driving module is connected between the first driving module and the anode of the light-emitting module, receives a signal of the temperature control module, adjusts the voltage of the first driving module, and enables the resistance film above the light-emitting module to start or stop heating.
Preferably, the first driving module includes a first transistor and a capacitor, which are connected in parallel, and the current level in the light emitting module is set by the voltage of the first transistor.
Further, the first transistor is an NMOS transistor.
As a preferred technical solution, the second driving module includes a second transistor, and a drain-substrate junction of the second transistor forms a clamping diode to protect the first driving module from a short circuit of the light emitting module.
Preferably, the resistance thin film is an indium tin oxide layer or an indium zinc oxide layer.
As a preferred technical solution, the temperature control module includes a temperature sensor for detecting the temperature of the light emitting module.
A heating method for an AMOLED, comprising the steps of:
s01, obtaining the service temperature of the light emitting module;
s02, judging whether the service temperature is lower than a preset threshold temperature; if not, step S04; if yes, go to step S03;
s03, adjusting the voltage of the second driving module to increase the current of the first driving module, starting heating the light emitting module and the surroundings thereof to make the service temperature of the light emitting module higher than the preset threshold temperature, and returning to the step S02;
and S04, adjusting the voltage of the second driving module to reduce the current of the first driving module, stopping heating the light emitting module and the periphery of the light emitting module, and ending the cycle.
Preferably, the threshold temperature is between 10 ℃ and-50 ℃.
As a preferable technical solution, the first driving module heats the light emitting module and the surroundings thereof by applying a voltage to the resistive film located above the light emitting module.
A display device comprises the self-heating driving circuit for the AMOLED.
The invention has the beneficial effects that: on the basis of the existing design, the self-heating function is realized by adding a bias transistor fixed on an OLED pin and adjusting the voltage through a first driving module and a second driving module, the AMOLED micro-display is applied in a wider temperature range (-50 to 70 ℃), and the existing design complexity is not increased, external elements are not added, or the reduction of the pixel size is not limited.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive exercise.
FIG. 1 is a drawing of the present invention: a circuit schematic of a self-heating driver circuit for an AMOLED;
FIG. 2 is a drawing of the present invention: a schematic structure diagram of a self-heating driving circuit for an AMOLED;
FIG. 3 is a drawing of the present invention: a flow diagram of a heating method for an AMOLED;
FIG. 4 is a drawing of the present invention: a schematic diagram of a heating method for an AMOLED;
wherein:
11-light emitting module
12-first drive Module
13-second drive Module
14-temperature control Module
100-temperature control system
105-temperature sensor
110-voltage controlled oscillator
120-control device
130-management element
140-a processor.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Example 1
Referring to fig. 1-2, a self-heating driving circuit for an AMOLED includes: a light emitting module 11, a first driving module 12, a second driving module 13, and a temperature control module 14.
The light emitting module 11 includes OLED light emitting devices D1, such as OLED pixels, each of which includes at least three color sub-pixels.
In the present invention, the first driving module 12 is connected to the light emitting module 11 and provides a driving signal, and generally, the first driving module 12 includes a first transistor Q1 and a capacitor C1, which are arranged in parallel, and sets the current level in the light emitting module 11 according to the voltage of the first transistor Q1, wherein the first transistor Q1 is preferably an NMOS transistor. In this example, the first driving block 12 also comprises an access switch of a pixel consisting of a transmission channel structure consisting of a transistor Q2 and a transistor Q3 acting as a switch, both of which are controlled to be closed by signals rowseleb and ROWSEL during the programming phase in order to write data, both of which are open at the end of programming.
The temperature control module 14 in the present invention is used for monitoring the temperature of the light emitting module 11; generally, the temperature control module 14 is built in the silicon substrate and includes a temperature sensor, a control device, and the like.
The second driving module 13 of the present invention is connected between the first driving module 12 and the anode of the light emitting module 11, and receives a signal from the temperature control module 14, adjusts the voltage of the first driving module 12, and starts or stops heat generation on the resistive film located above the light emitting module 11. In this example, the second driving module 13 includes a second transistor Q4, and the drain-substrate junction of the second transistor Q4 forms a clamping diode to protect the first driving module 12 from the short circuit of the light emitting module 11. Since the second transistor Q4 constitutes a bias circuit, when the temperature sensor monitors that the temperature of the light emitting module 11 is lower than a preset threshold temperature, usually the preset threshold is in a range of 10 ℃ to-50 ℃, the control device controls the voltage of the second driving module 13 to increase, and further the current of the first transistor Q1 is increased, so that the resistor film above the light emitting module 11 starts to generate heat, and further self-heating is realized. Therefore, the present invention has the advantage of driving the first transistor Q1 with the top voltage to increase the current, self-heating the OLED without affecting the OLED's signal.
Preferably, the resistive thin film of the present invention is an indium tin oxide layer, and may be any one of a titanium oxide layer, a zinc oxide layer, a zirconium oxide layer, a tantalum pentoxide layer, and an aluminum oxide layer.
Through the structure, on the basis of the existing design, the self-heating function is realized by adding the bias transistor fixed on the OLED pin and regulating the voltage through the first driving module 12 and the second driving module 13, the AMOLED micro-display is applied in a wider temperature range (-50 to 70 ℃), and the existing design complexity is not improved, external elements are not added, or the reduction of the pixel size is not limited. In particular, this is unique and innovative in industries where increased current is not common in the first transistor Q1 and the second transistor Q4 with the VCOMMON pin fixed. Also in the present invention, it is innovative to utilize the current circuit design architecture by utilizing the first transistor Q1 and the second transistor Q4 to regulate the existing voltage.
Example 2
Referring to fig. 3, the present invention also provides a heating method for an AMOLED, including the steps of:
s01, obtaining the service temperature of the light emitting module;
s02, judging whether the use temperature is lower than a preset threshold temperature; if not, step S04; if yes, go to step S03;
s03, adjusting the voltage of the second driving module to increase the current of the first driving module, starting heating the light emitting module and the surroundings thereof to make the service temperature of the light emitting module higher than the preset threshold temperature, and returning to the step S02;
and S04, adjusting the voltage of the second driving module to reduce the current of the first driving module, stopping heating the light emitting module and the periphery of the light emitting module, and ending the cycle.
Wherein the threshold temperature is between 10 ℃ and-50 ℃, and the threshold temperature is set to be 0 ℃ in order to realize the best performance of the AMOLED.
The first driving module in this embodiment heats the light emitting module and its surroundings by applying a voltage to the resistive film located above the light emitting module.
In particular, as shown in fig. 4, the temperature control system 100 includes a control device 120 for adjusting the temperature of the OLED to maintain the temperature relatively constant and maximize performance. The control device 120 can reduce the voltage offset by controlling the forward bias of the drive transistor, which acts to heat the AMOLED pixel and its surroundings. The heating temperature is adjusted by the second driving module, and the voltage of the second driving module is increased at low temperature, so that the first driving module can achieve the purpose of self-heating the OLED pixels through higher current. When the control device 120 receives a signal from the temperature sensor 105 that the temperature is too high, the management element 130 decreases the output voltage of the second driving module, thereby decreasing the current through the first driving module.
Since the temperature sensor 105 is embedded in the silicon substrate, the voltage controlled oscillator 110(VCO) generates an output as a temperature measurement signal when measuring the temperature, and at this time, the temperature management system receives the temperature signal, converts the temperature signal into a digital signal and transmits the digital signal to the system processor 140, thereby completing the acquisition of the temperature data of the light emitting module. The system processor processes the digital signal corresponding to the temperature of the microdisplay and generates a signal based on the reference signal that is input to the control element, and the control element 120 self-heats or stops heating the display in response to the temperature control signal for the microdisplay.
Example 3
A display device comprising the self-heating driver circuit for AMOLED of embodiment 1.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A self-heating driver circuit for an AMOLED, comprising:
a light emitting module including an OLED light emitting device;
the first driving module is connected with the light-emitting module and provides a driving signal;
the temperature control module is used for monitoring the temperature of the light emitting module;
and the second driving module is connected between the first driving module and the anode of the light-emitting module, receives a signal of the temperature control module, adjusts the voltage of the first driving module, and enables the resistance film above the light-emitting module to start or stop heating.
2. The self-heating driving circuit for the AMOLED according to claim 1, wherein the first driving module comprises a first transistor and a capacitor arranged in parallel, and the current magnitude in the light emitting module is set by the voltage of the first transistor.
3. The self-heating driver circuit for an AMOLED of claim 2, wherein the first transistor is an NMOS transistor.
4. A self-heating driver circuit for AMOLED as claimed in claim 1, wherein the second driver module includes a second transistor with a drain-substrate junction forming a clamp diode to protect the first driver module from short-circuiting of the light emitting module.
5. The self-heating driver circuit for AMOLED according to claim 1, wherein the resistive thin film is an indium tin oxide layer or an indium zinc oxide layer.
6. The self-heating driver circuit for an AMOLED according to claim 1, wherein the temperature control module comprises a temperature sensor to detect the temperature of the light emitting module.
7. A heating method for an AMOLED, comprising the steps of:
s01, obtaining the service temperature of the light emitting module;
s02, judging whether the service temperature is lower than a preset threshold temperature; if not, step S04; if yes, go to step S03;
s03, adjusting the voltage of the second driving module to increase the current of the first driving module, starting heating the light emitting module and the surroundings thereof to make the service temperature of the light emitting module higher than the preset threshold temperature, and returning to the step S02;
and S04, adjusting the voltage of the second driving module to reduce the current of the first driving module, stopping heating the light emitting module and the periphery of the light emitting module, and ending the cycle.
8. A heating method for an AMOLED according to claim 7, wherein the threshold temperature is between 10 ℃ and-50 ℃.
9. A heating method for an AMOLED as claimed in claim 7, wherein the first driving module heats the light emitting module and its surroundings by applying a voltage to a resistive film over the light emitting module.
10. A display device comprising the self-heating driver circuit for AMOLED as claimed in any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011460694.9A CN112509522A (en) | 2020-12-11 | 2020-12-11 | Self-heating driving circuit for AMOLED and heating method and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011460694.9A CN112509522A (en) | 2020-12-11 | 2020-12-11 | Self-heating driving circuit for AMOLED and heating method and device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112509522A true CN112509522A (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011460694.9A Withdrawn CN112509522A (en) | 2020-12-11 | 2020-12-11 | Self-heating driving circuit for AMOLED and heating method and device thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN112509522A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113724650A (en) * | 2021-09-03 | 2021-11-30 | 京东方科技集团股份有限公司 | Display panel, display device and temperature adjusting method |
| CN114420048A (en) * | 2021-12-27 | 2022-04-29 | 绵阳惠科光电科技有限公司 | Temperature control method and circuit and display device |
-
2020
- 2020-12-11 CN CN202011460694.9A patent/CN112509522A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113724650A (en) * | 2021-09-03 | 2021-11-30 | 京东方科技集团股份有限公司 | Display panel, display device and temperature adjusting method |
| CN114420048A (en) * | 2021-12-27 | 2022-04-29 | 绵阳惠科光电科技有限公司 | Temperature control method and circuit and display device |
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Application publication date: 20210316 |