CN105702702A - Oled display device - Google Patents
Oled display device Download PDFInfo
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- CN105702702A CN105702702A CN201410692243.6A CN201410692243A CN105702702A CN 105702702 A CN105702702 A CN 105702702A CN 201410692243 A CN201410692243 A CN 201410692243A CN 105702702 A CN105702702 A CN 105702702A
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Abstract
The invention discloses an OLED display device comprising a drive backboard, an opposite substrate and a temperature control device. A drive circuit and an OLED light emitting unit are prepared at one side of the drive backboard. The opposite substrate is arranged on the OLED light emitting unit of the drive backboard. The temperature control device is arranged at the other side of the drive backboard to adjust the temperature of the OLED light emitting unit. According to the OLED display device of the invention, the temperature of the OLED display device is adjusted through the temperature control device, so that the OLED display device works within an allowed temperature range, the working stability of the OLED display device is ensured, and the problem of display image distortion caused by temperature change of the OLED display device is avoided.
Description
Technical field
The present invention relates to OLED Display Technique, refer in particular to a kind of OLED display device。
Background technology
OLED display device is a kind of device from main light emission, possess bright-colored, luminous efficiency is high, light weight, visible angle are wide, fast response time, can the advantage such as flexible preparation。
Fig. 1 is the structural representation of traditional OLED display device, consulting Fig. 1, OLED display device includes anode layer 91 and is sequentially prepared and the hole injection layer 92 on anode layer 91, hole transmission layer 93, organic luminous layer 94, electron transfer layer 95, electron injecting layer 96 and cathode layer 97。The injection in electronics and hole has certain heat energy, need to overcome after the energy barrier of electrode and organic layer can injection organic material, its principle of luminosity is: add a bias between negative electrode and anode, electronics injects from cathode layer 97, organic luminous layer 94 is entered into through electron injecting layer 96 and electron transfer layer 95, hole is injected from anode layer 91, organic luminous layer 94 is entered into through hole injection layer 92 and hole transmission layer 93, electronics and hole are compounded to form singlet exciton at organic luminous layer 94, singlet exciton attenuation, produces photon and carries out luminescence。Temperature can affect the injection efficiency of electronics and hole, thus affecting the brightness of OLED and causing display image fault。Relation between electric current density and the temperature of OLED display device is as follows:Wherein JasFor electric current density, T is temperature, and E is electric field intensity, and K is Boltzmann constant, and △ is electric field intensity is injection energy barrier when zero, and A is Richardson constant。
Consult shown in Fig. 2, for operating current (I under identical load voltage (6V) of the trichroism OLED of red green blue of area identical (0.5 μm * 0.5 μm)OLED) with the trend of variation of ambient temperature, the excursion of ambient temperature is between-40 DEG C to 85 DEG C。For Blue OLED, as shown in Figure 2, in room temperature environment (25 DEG C), the operating current of OLED is 120 μ A, along with the rising of the temperature of environment, IOLEDBeing gradually increased, when ambient temperature reaches 85 DEG C, OLED still works, IOLEDIncrease to 730 μ A；Otherwise, along with the reduction of ambient temperature, IOLEDBeing gradually lowered, be low to moderate in the environment of-40 DEG C in temperature, OLED can also work, but IOLEDIt is only 2.5 μ A。It can be seen that the trend that the operating characteristic of red and green OLED varies with temperature is similar to Blue OLED。Although OLED can work in high temperature (high to 85 DEG C) and the environment of low temperature (being low to moderate-40 DEG C), but contrast room temperature working environment, its electrology characteristic has significant change, can cause that the duty of the image element circuit at its place also changes。
Therefore, how effectively to control the ambient temperature impact on OLED, be this area problem demanding prompt solution。
Summary of the invention
Because the problem of OLED display device temperature influence in above-mentioned prior art, the invention provides a kind of OLED display device, including:
Driving backboard, the side preparation of described driving backboard has drive circuit and OLED luminescence unit；
Opposite substrate, is arranged on the described OLED luminescence unit of described driving backboard；
Attemperating unit, is arranged at the opposite side of described driving backboard so that described OLED luminescence unit is carried out temperature adjustment。
The OLED display device of the present invention, by attemperating unit, the temperature of OLED display device is adjusted, when ambient temperature scope admissible lower than OLED display device, attemperating unit starts, OLED display device is heated, when the temperature of OLED display device is higher, by attemperating unit, OLED display device can be dispelled the heat, effectively control the ambient temperature impact on OLED display device。
Further improvement is that of OLED display device of the present invention, described attemperating unit includes heating film and the Temperature controlled heater being connected with described heating film。When the temperature of OLED display device is higher, can dispel the heat by the heat conductivity that heating film is good。
Further improvement is that of OLED display device of the present invention, described heating film includes two layers polyester thin film, and between described two layers polyester thin film, preparation has two metal current-carrying bars, and between described two metal current-carrying bars, preparation has plural bar carbon element bar。
Further improvement is that of OLED display device of the present invention, described two metal current-carrying bars are prepared in two sidepieces relative between described two layers polyester thin film respectively。
Further improvement is that of OLED display device of the present invention, described metal current-carrying bar includes copper bar and nickel bar, and described copper bar is incorporated on described nickel bar。
Further improvement is that of OLED display device of the present invention, described Temperature controlled heater is connected with described copper bar。
Further improvement is that of OLED display device of the present invention, described heating film is provided with the temperature sensor for detecting ambient temperature。
Further improvement is that of OLED display device of the present invention, described temperature sensor is arranged at described polyester film surface。
Further improvement is that of OLED display device of the present invention, is sealed with packaging plastic between described driving backboard and described opposite substrate, described packaging plastic is surrounded on described driving backboard surrounding。
Further improvement is that of OLED display device of the present invention, also includes polaroid, is arranged at above described opposite substrate。
Accompanying drawing explanation
Fig. 1 is the structural representation of traditional OLED display device。
Fig. 2 is the operating current relation schematic diagram with ambient temperature of traditional OLED display device。
Fig. 3 is the structural representation of OLED display device of the present invention。
Fig. 4 is the internal structure schematic diagram of the attemperating unit of OLED display device of the present invention。
Fig. 5 is the schematic perspective view of the heating film of OLED display device of the present invention。
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated。Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention。
Traditional OLED display device includes:
Driving backboard, drive preparation on backboard to have OLED luminescence unit, wherein, image element circuit is made on driving backboard, and luminous organic material is deposited with on anode, and luminous organic material surface is deposited with layer of transparent negative electrode again and namely may make up OLED luminescence unit；
Opposite substrate, is arranged on driving backboard；
Polaroid, is arranged at the top of opposite substrate。
Under normal circumstances, the image element circuit of OLED, switched TFT (M by oneS), one drive TFT (MD), an electric capacity (CS) and an OLED composition。In OLED glow phase, driving TFT and OLED in running order, drive the voltage ELVDD of TFT one end to remain unchanged, in hot environment, the equivalent resistance of OLED reduces, and dividing potential drop reduces, the V of TFTDSIncreasing, the driving electric current of TFT can increase to some extent, i.e. IOLEDIncrease；Otherwise, in low temperature environment, IOLEDReduce。It is to say, temperature can affect the electronics of OLED luminescence unit and the injection efficiency in hole, thus affecting the brightness of OLED and causing display image fault。Although OLED can work in high temperature (high to 85 DEG C) and the environment of low temperature (being low to moderate-40 DEG C), but contrast room temperature working environment, its electrology characteristic has significant change, can cause that the duty of the image element circuit at its place also changes。Because the problems referred to above, in order to ensure the stability of AMOLED system in varying environment temperature, the actual work temperature of OLED need to be controlled。
Therefore, the invention provides a kind of OLED display device, Fig. 3 is the structural representation of OLED display device of the present invention, coordinates referring to Fig. 3, the OLED display device of the present invention, including:
Drive backboard 10, drive the side preparation of backboard 10 to have drive circuit and OLED luminescence unit 110。
Opposite substrate 20, is arranged on the OLED luminescence unit 110 driving backboard 10。Driving and sealed by packaging plastic 30 between backboard 10 and opposite substrate 20, packaging plastic 30 is surrounded on driving backboard 10 surrounding。
Polaroid 40, is arranged at the top of opposite substrate 20。
Attemperating unit, shown in Fig. 4, described attemperating unit includes the heating film 50 being arranged at the opposite side driving backboard 10 and the Temperature controlled heater 60 being connected with heating film 50, for the temperature of OLED display device is adjusted。Preferably, shown in Fig. 5, heating film 50 includes two layers polyester thin film 510, the surface of mylar 510 is integrated with the temperature sensor 540 for detecting ambient temperature, between two layers polyester thin film 510, preparation has two metal current-carrying bars 520, is further prepared with plural number bar carbon element bar 530 between two metal current-carrying bars 520。Wherein, two metal current-carrying bars 520, two sidepieces that to be prepared between two layers polyester thin film 510 respectively relative。Metal current-carrying bar 520 includes again copper bar 521 and nickel bar 522, copper bar 521 is incorporated on nickel bar 522, forms metal current-carrying bar 520, and Temperature controlled heater 60 is connected with copper bar 521, copper bar 521 transfers heat to carbon element bar 530 again, thus realizing the heating to OLED display device。
The OLED display device of the present invention, senses the temperature to OLED display device by temperature sensor 540, and when ambient temperature scope admissible lower than OLED display device, Temperature controlled heater 60 starts, and by heating film 50, OLED display device is heated；When the temperature of OLED display device is higher, can dispel the heat by the heat conductivity that heating film 50 is good。Effectively control the ambient temperature impact on OLED display device。
The above is only presently preferred embodiments of the present invention, not the present invention is done any pro forma restriction, although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, any those skilled in the art, without departing from the scope of technical solution of the present invention, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is the content without departing from technical solution of the present invention, according to any simple modification that above example is made by the technical spirit of the present invention, equivalent variations and modification, belong in the scope of technical solution of the present invention。
Claims (10)
1. an OLED display device, it is characterised in that including:
Driving backboard, the side preparation of described driving backboard has drive circuit and OLED luminescence unit；
Opposite substrate, is arranged on the described OLED luminescence unit of described driving backboard；
Attemperating unit, is arranged at the opposite side of described driving backboard so that described OLED luminescence unit is carried out temperature adjustment。
2. OLED display device as claimed in claim 1, it is characterised in that described attemperating unit includes heating film and the Temperature controlled heater being connected with described heating film。
3. OLED display device as claimed in claim 2, it is characterised in that described heating film includes two layers polyester thin film, between described two layers polyester thin film, preparation has two metal current-carrying bars, and between described two metal current-carrying bars, preparation has plural bar carbon element bar。
4. OLED display device as claimed in claim 3, it is characterised in that described two metal current-carrying bars are prepared in two sidepieces relative between described two layers polyester thin film respectively。
5. OLED display device as claimed in claim 3, it is characterised in that described metal current-carrying bar includes copper bar and nickel bar, and described copper bar is incorporated on described nickel bar。
6. OLED display device as claimed in claim 5, it is characterised in that described Temperature controlled heater is connected with described copper bar。
7. OLED display device as claimed in claim 3, it is characterised in that described heating film is provided with the temperature sensor for detecting ambient temperature。
8. OLED display device as claimed in claim 7, it is characterised in that described temperature sensor is arranged at described polyester film surface。
9. OLED display device as claimed in claim 1, it is characterised in that being sealed with packaging plastic between described driving backboard and described opposite substrate, described packaging plastic is surrounded on described driving backboard surrounding。
10. OLED display device as claimed in claim 9, it is characterised in that also include polaroid, be arranged at above described opposite substrate。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410692243.6A CN105702702A (en) | 2014-11-25 | 2014-11-25 | Oled display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410692243.6A CN105702702A (en) | 2014-11-25 | 2014-11-25 | Oled display device |
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| CN105702702A true CN105702702A (en) | 2016-06-22 |
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| CN201410692243.6A Pending CN105702702A (en) | 2014-11-25 | 2014-11-25 | Oled display device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870687A (en) * | 2016-09-27 | 2018-04-03 | 上海和辉光电有限公司 | The method that display device and touch-screen operating temperature to display device are adjusted |
| CN112037711A (en) * | 2020-09-11 | 2020-12-04 | 京东方科技集团股份有限公司 | Driving device and driving method of display panel and display device |
| WO2020257985A1 (en) * | 2019-06-24 | 2020-12-30 | 深圳市柔宇科技有限公司 | Flexible display device and flexible display module |
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| US20050122065A1 (en) * | 2003-12-05 | 2005-06-09 | Dialight Corporation | Dynamic color mixing LED device |
| CN101042481A (en) * | 2006-03-21 | 2007-09-26 | 株式会社半导体能源研究所 | Backlight device and display device |
| CN103021334A (en) * | 2012-12-13 | 2013-04-03 | 京东方科技集团股份有限公司 | Pixel structure, pixel unit structure, display panel and display device |
| CN203482419U (en) * | 2013-09-16 | 2014-03-12 | 崔明学 | Electrothermal film |
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2014
- 2014-11-25 CN CN201410692243.6A patent/CN105702702A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050122065A1 (en) * | 2003-12-05 | 2005-06-09 | Dialight Corporation | Dynamic color mixing LED device |
| CN101042481A (en) * | 2006-03-21 | 2007-09-26 | 株式会社半导体能源研究所 | Backlight device and display device |
| CN103021334A (en) * | 2012-12-13 | 2013-04-03 | 京东方科技集团股份有限公司 | Pixel structure, pixel unit structure, display panel and display device |
| CN203482419U (en) * | 2013-09-16 | 2014-03-12 | 崔明学 | Electrothermal film |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870687A (en) * | 2016-09-27 | 2018-04-03 | 上海和辉光电有限公司 | The method that display device and touch-screen operating temperature to display device are adjusted |
| CN107870687B (en) * | 2016-09-27 | 2021-04-06 | 上海和辉光电股份有限公司 | Display device and method for adjusting working temperature of touch screen of display device |
| WO2020257985A1 (en) * | 2019-06-24 | 2020-12-30 | 深圳市柔宇科技有限公司 | Flexible display device and flexible display module |
| CN112037711A (en) * | 2020-09-11 | 2020-12-04 | 京东方科技集团股份有限公司 | Driving device and driving method of display panel and display device |
| US11869420B2 (en) | 2020-09-11 | 2024-01-09 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Driving device and driving method for display panel, and display device |
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Application publication date: 20160622 |
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