技术领域technical field
本发明涉及OLED领域，具体地，涉及一种OLED驱动电路。The invention relates to the field of OLEDs, in particular to an OLED driving circuit.
背景技术Background technique
OLED即有机发光二极管，基本结构是由一薄而透明具半导体特性之铟锡氧化物，与电力之正极相连，再加上另一个金属阴极，包成如三明治的结构。整个结构层中包括了：空穴传输层(HTL)、发光层(EL)与电子传输层(ETL)。当电力供应至适当电压时，正极空穴与阴极电荷就会在发光层中结合，产生光亮，依其配方不同产生红、绿和蓝RGB三原色，构成基本色彩。OLED的特性是自己发光因此可视度和亮度均高，其次是电压需求低且省电效率高，加上反应快、重量轻、厚度薄，构造简单，成本低等，被视为 21世纪最具前途的产品之一。OLED is an organic light-emitting diode. The basic structure is a thin and transparent indium tin oxide with semiconducting properties, which is connected to the positive electrode of electricity, and another metal cathode is added to form a sandwich structure. The whole structural layer includes: hole transport layer (HTL), light emitting layer (EL) and electron transport layer (ETL). When the power is supplied to an appropriate voltage, the positive holes and the negative charges will combine in the light-emitting layer to produce light, and the three primary colors of red, green and blue RGB will be produced according to their formulas to form the basic colors. The characteristic of OLED is that it emits light by itself, so it has high visibility and brightness, followed by low voltage requirements and high power saving efficiency, plus fast response, light weight, thin thickness, simple structure, and low cost. One of the promising products.
对OLED一般采用单片机做控制。单片机输入信号功率小，不足以直接驱动OLED，采用驱动电路对OLED进行驱动，现有的驱动电路一般采用继电器。但是由于继电器的开关延迟时间长，使得片选和送数据不匹配，使得OLED的显示很混乱。The OLED is generally controlled by a single-chip microcomputer. The input signal power of the single-chip microcomputer is too small to directly drive the OLED, so a drive circuit is used to drive the OLED. The existing drive circuit generally uses a relay. However, due to the long switch delay time of the relay, the chip selection and the sending data do not match, which makes the OLED display very confusing.
发明内容Contents of the invention
本发明提供一种OLED驱动电路，解决现有技术中开关延时导致的OLED的显示很混乱的问题。The invention provides an OLED driving circuit, which solves the problem of confusion in OLED display caused by switching delay in the prior art.
本发明解决上述问题所采用的技术方案是：The technical solution adopted by the present invention to solve the above problems is:
一种OLED驱动电路，其特征在于：包括光电耦合器和反相器，所述的光电耦合器的ANODE引脚和用于驱动OLED的COLLECTOR引脚上均连接有上拉电阻且EMITTER引脚接地，所述的反相器的输出端连接在光电耦合器的CATHODE引脚上。A kind of OLED drive circuit, it is characterized in that: comprise optocoupler and inverter, the ANODE pin of described optocoupler and the COLLECTOR pin that is used to drive OLED are all connected with pull-up resistor and EMITTER pin is grounded , the output terminal of the inverter is connected to the CATHODE pin of the optocoupler.
本发明的驱动电路其直接选用光电耦合器实现对电压的转换，反相器的输入端连接单片机的信号输出端，当单片机输出高电平时，光电耦合器工作，其EMITTER引脚输出低电平；反之，单片机输出低电平时，光电耦合器的发光二极管截止，EMITTER引脚输出高电平对OLED进行驱动。本发明采用光电耦合器不仅可对电压进行转换，还具有其他优势：由于其单向性，可对信号进行隔离，使单片机端和OLED端的电流相互独立，减小系统所受的干扰，提高可靠性。采用反相器对单片机的输出信号进行反向，以增强驱动能力。由于光电耦合器为电路驱动型器件，要足够大的电流才能够使OLED导通发光，输入信号太小，不能驱动OLED导通，使得输出失真，采用反相器，以增强其驱动能力，减小输出失真的问题。光电耦合器的ANODE引脚上连接的上拉电阻不仅为芯片的运行提供合适的电压，也起到限流作用，避免大电流对光电耦合器的运行带来影响，有效的保证电路的稳定运行。整个驱动电路采用光电耦合器实现，其不存在开关延时的问题，有效的解决了OLED显示混乱的问题。The drive circuit of the present invention directly selects the optocoupler to realize the conversion of the voltage, and the input end of the inverter is connected to the signal output end of the single-chip microcomputer. When the single-chip microcomputer outputs a high level, the optocoupler works, and its EMITTER pin outputs a low level ; Conversely, when the microcontroller outputs a low level, the light-emitting diode of the photocoupler is cut off, and the EMITTER pin outputs a high level to drive the OLED. The invention adopts the photoelectric coupler to not only convert the voltage, but also has other advantages: due to its unidirectionality, the signal can be isolated, so that the currents of the single-chip microcomputer terminal and the OLED terminal are independent of each other, reducing the interference suffered by the system and improving reliability. sex. An inverter is used to invert the output signal of the microcontroller to enhance the driving capability. Since the photocoupler is a circuit-driven device, it needs a large enough current to make the OLED turn on and emit light. The input signal is too small to drive the OLED to turn on, which makes the output distorted. An inverter is used to enhance its driving ability and reduce Small output distortion issues. The pull-up resistor connected to the ANODE pin of the optocoupler not only provides a suitable voltage for the operation of the chip, but also acts as a current limiter to avoid the impact of high current on the operation of the optocoupler and effectively ensure the stable operation of the circuit . The entire driving circuit is implemented by a photocoupler, which does not have the problem of switching delay, and effectively solves the problem of OLED display confusion.
作为优选，为了进一步的提高驱动电路的性能，所述的光电耦合器为TLP521-1。Preferably, in order to further improve the performance of the driving circuit, the photocoupler is TLP521-1.
作为优选，所述的反相器为7406。Preferably, the inverter is 7406.
综上，本发明的有益效果是：In sum, the beneficial effects of the present invention are:
1、本发明采用光电耦合器实现对电压的转换，并利用反相器对单片机的输出信号进行反向，以提高电路的驱动能力，有效的解决了开关延时导致的OLED的显示很混乱的问题。1. The present invention uses a photocoupler to convert the voltage, and uses an inverter to reverse the output signal of the single-chip microcomputer, so as to improve the driving ability of the circuit, and effectively solve the confusion of the OLED display caused by the switching delay. question.
2、本发明的电路结构简单，易于实现。2. The circuit structure of the present invention is simple and easy to realize.
附图说明Description of drawings
图1是本发明的电路原理图。Fig. 1 is the schematic circuit diagram of the present invention.
具体实施方式Detailed ways
下面结合实施例及附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments and accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
实施例1：Example 1:
如图1所示的一种OLED驱动电路，其特征在于：包括光电耦合器和反相器，所述的光电耦合器的ANODE引脚和用于驱动OLED的COLLECTOR引脚上均连接有上拉电阻且EMITTER引脚接地，所述的反相器的输出端连接在光电耦合器的CATHODE引脚上。COLLECTOR引脚连接在OLED的正极，OLED的负极接地。A kind of OLED drive circuit as shown in Figure 1, it is characterized in that: comprise optocoupler and inverter, the ANODE pin of described optocoupler and the COLLECTOR pin that is used to drive OLED are all connected with pull-up resistor and the EMITTER pin is grounded, and the output end of the inverter is connected to the CATHODE pin of the optocoupler. The COLLECTOR pin is connected to the positive pole of the OLED, and the negative pole of the OLED is grounded.
本实施例仅在单片机输出低电平时可有效的对OLED进行驱动。In this embodiment, the OLED can be effectively driven only when the single-chip microcomputer outputs a low level.
光电耦合器的ANODE引脚、CATHODE引脚、EMITTER引脚、COLLECTOR引脚即分别为芯片的1引脚、2引脚、3引脚、4引脚。The ANODE pin, CATHODE pin, EMITTER pin, and COLLECTOR pin of the photocoupler are the 1 pin, 2 pin, 3 pin, and 4 pin of the chip, respectively.
实施例2：Example 2:
如图1所示的一种OLED驱动电路，本实施例在上述实施例的基础上做了细化，即公开一组具体的实施方式，即所述的光电耦合器为TLP521-1。所述的反相器为7406，光电耦合器的ANODE引脚和COLLECTOR引脚上的上拉电阻分别可采用100欧姆和1000欧姆。An OLED driving circuit as shown in FIG. 1 , this embodiment is refined on the basis of the above embodiments, that is, a group of specific implementation modes are disclosed, that is, the photocoupler is TLP521-1. The inverter is 7406, and the pull-up resistors on the ANODE pin and COLLECTOR pin of the optocoupler can be 100 ohms and 1000 ohms respectively.
TLP521-1为低电压小电流控制高电压大电流，其价格便宜，电流传输比高，可有效的提高驱动性能。TLP521-1 controls high voltage and high current with low voltage and small current. It is cheap and has high current transfer ratio, which can effectively improve the driving performance.
为了提高OLED的相应速度，可在OLED上并联一电容。In order to increase the response speed of the OLED, a capacitor can be connected in parallel with the OLED.
如上所述，可较好的实现本发明。As described above, the present invention can be preferably carried out.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510213321.4ACN104809981A (en) | 2015-04-30 | 2015-04-30 | OLED drive circuit |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510213321.4ACN104809981A (en) | 2015-04-30 | 2015-04-30 | OLED drive circuit |
| Publication Number | Publication Date |
|---|---|
| CN104809981Atrue CN104809981A (en) | 2015-07-29 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510213321.4APendingCN104809981A (en) | 2015-04-30 | 2015-04-30 | OLED drive circuit |
| Country | Link |
|---|---|
| CN (1) | CN104809981A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060220581A1 (en)* | 2001-09-21 | 2006-10-05 | Semiconductor Energy Laboratory Co., Ltd. | Light Emitting Device, Driving Method of Light Emitting Device and Electronic Device |
| CN101097680A (en)* | 2006-06-30 | 2008-01-02 | Lg.菲利浦Lcd株式会社 | Organic light emitting diode display device and driving method thereof |
| KR20080082820A (en)* | 2007-03-09 | 2008-09-12 | 엘지디스플레이 주식회사 | Organic light emitting diode display and its driving method |
| CN102542983A (en)* | 2010-12-22 | 2012-07-04 | 乐金显示有限公司 | Organic light emitting diode display |
| CN204256983U (en)* | 2014-12-08 | 2015-04-08 | 厦门艾通信息科技有限公司 | A kind of traffic signal light fault testing circuit |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060220581A1 (en)* | 2001-09-21 | 2006-10-05 | Semiconductor Energy Laboratory Co., Ltd. | Light Emitting Device, Driving Method of Light Emitting Device and Electronic Device |
| CN101097680A (en)* | 2006-06-30 | 2008-01-02 | Lg.菲利浦Lcd株式会社 | Organic light emitting diode display device and driving method thereof |
| KR20080082820A (en)* | 2007-03-09 | 2008-09-12 | 엘지디스플레이 주식회사 | Organic light emitting diode display and its driving method |
| CN102542983A (en)* | 2010-12-22 | 2012-07-04 | 乐金显示有限公司 | Organic light emitting diode display |
| CN204256983U (en)* | 2014-12-08 | 2015-04-08 | 厦门艾通信息科技有限公司 | A kind of traffic signal light fault testing circuit |
| Publication | Publication Date | Title |
|---|---|---|
| KR102277563B1 (en) | White organic light emitting device | |
| CN202484906U (en) | Welding-free conductive connection structure for LED (Light-Emitting Diode) aluminum substrate and driving power source | |
| CN103503572A (en) | Constant current driver circuit for LED | |
| CN103579520B (en) | Organic light emitting diodde desplay device | |
| CN107134256A (en) | Display panel and its driving method, display device | |
| CN103700691B (en) | Display base plate and display device | |
| CN205451704U (en) | OLED (organic light -emitting diode) display | |
| CN104124399A (en) | Organic light-emitting device and manufacturing method | |
| CN204634081U (en) | A low-distortion OLED driving circuit | |
| CN204632313U (en) | A driving circuit for OLED | |
| CN104809981A (en) | OLED drive circuit | |
| CN201462635U (en) | Lighting device | |
| CN204577428U (en) | Organic electroluminescence device, display unit and lighting device | |
| CN116322209A (en) | A display panel and a display device | |
| CN202948929U (en) | Common-cathode OLED double-sided display transparent screen and electronic equipment | |
| CN102593109A (en) | Stack-based organic light emitting diode | |
| CN102437151B (en) | Full-color SMD LED (Surface Mounted Device Light Emitting Diode) bracket structure and packaging product device thereof | |
| CN206059393U (en) | A kind of organic electroluminescent diode display device | |
| CN109065752A (en) | Organic light emitting display panel and display device | |
| CN111341819B (en) | A light-emitting device, a display device and a manufacturing method thereof | |
| CN203632931U (en) | Protection circuit for driving LED light source COB series combination with switching power supply | |
| CN204375750U (en) | A kind of device based on the luminescence of OPV driving OLED | |
| CN104812117A (en) | Small-distortion OLED (organic light-emitting diode) driving circuit | |
| CN204333041U (en) | A kind of Organic Light Emitting Diode of sandwich construction | |
| CN205039182U (en) | Organic light emitting diode |
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | Application publication date:20150729 | |
| RJ01 | Rejection of invention patent application after publication |