Driving circuit for OLED (organic light emitting diode) lighting device

A lighting device and drive circuit technology, applied in the field of lighting, can solve problems such as short-circuit failure, increased cost, and defective products cannot be very effective, and achieve the effects of improving reliability and preventing dynamic short-circuit failure

Active Publication Date: 2014-06-18
江苏壹光科技有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, since OLED lighting is a surface light source with soft light and relatively low brightness, it needs a sufficient area to achieve a certain lighting effect
However, as the size of OLED lighting panels increases, the number of defects will increase exponentially
The above method will not be able to effectively guarantee the yield rate of the product, but it will greatly increase the cost of the product
[0005] In addition, through product aging, some products with serious defects can be screened out in advance, but it is not very effective for products with potential defects.
Therefore, a new technology is needed to improve the yield rate of OLED lighting products, especially to solve the serious problem of dynamic short-circuit failure during the use of OLED lighting products

Method used

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  • Driving circuit for OLED (organic light emitting diode) lighting device
  • Driving circuit for OLED (organic light emitting diode) lighting device
  • Driving circuit for OLED (organic light emitting diode) lighting device

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Embodiment Construction

[0031] Such as figure 2 , 3 As shown, the OLED lighting device driving circuit of the present invention can generate a driving signal with alternating forward and reverse voltages, and includes the following components: a current source (31) for outputting a constant positive current; a voltage source (32) ), used to output a constant negative voltage; a waveform generator (33) and two switches (34, 35), the waveform generator (33) is used to generate two channels of rectangular pulse signals (51, 52) ); The rectangular pulse signal (51, 52) is used to control the on and off of the two switches (34, 35) respectively, thereby modulating the output of the current source (31) and the voltage source (32); a resistor ( 36) and a capacitor (37) for the auxiliary voltage source (32) to apply reverse voltage to the OLED lighting device (100) and to precisely control the amount of charge released to the OLED lighting device (100); the connection relationship of each element is: The cur...

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Abstract

The invention provides a driving circuit for an OLED (organic light emitting diode) lighting device. The driving circuit for the OLED lighting device comprises a current source (31), a voltage source (32), a waveform generator (33), two switches (34 and 35), one resistor (36) and one capacitor (37). The driving circuit has the following beneficial effect of realizing the driving mode of adding the reversed pulse voltage in each forward pulse period or every a plurality of forward pulse periods while the forward pulse current driving is adopted. Therefore, the reliability of the OLED lighting device is obviously improved and the problem of a failed dynamic short circuit is prevented.

Description

Technical field [0001] The invention is a driving circuit for OLED (organic electroluminescence) lighting devices, and belongs to the field of lighting technology. technical background [0002] OLED lighting technology is a new generation of green solid-state lighting technology. It is known as the most ideal artificial light source because of its energy saving, environmental protection and good light quality. In recent years, OLED lighting technology has made great progress, and its luminous efficiency has exceeded that of energy-saving lamps, reaching a practical level. However, in the process of commercialization, OLED lighting products are still facing problems such as poor reliability and low yield. This is essentially due to the structural characteristics of the OLED lighting device itself, which makes it more prone to short-circuit failures and other undesirable problems. [0003] Such as figure 1 As shown, the OLED lighting device 1000 is formed on a substrate 10 (general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCY02B20/30
Inventor 隋运武张海军田元生
Owner 江苏壹光科技有限公司
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