Fault-tolerant circuit for organic electroluminescent display/illuminating device

A technology for lighting devices and fault-tolerant circuits, which is applied in the layout of electric light circuits, electric light sources, lighting devices, etc. The power consumption remains unchanged and the effect of reducing the increase in power consumption

Active Publication Date: 2008-10-01
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the main purpose of the present invention is to provide a fault-tolerant circuit for an organic electroluminescence display/illumination device, to solve the problem of insufficiency ...

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  • Fault-tolerant circuit for organic electroluminescent display/illuminating device
  • Fault-tolerant circuit for organic electroluminescent display/illuminating device

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0041] The focus of the present invention is to use polysilicon TFTs to detect the short-circuit fault, and after the short-circuit fault is detected, the circuit is switched to the normal spare OLED element, so that the entire screen continues to work normally.

[0042] Such as figure 2 as shown, figure 2 A schematic diagram of a fault-tolerant circuit for an organic electroluminescent display / illumination device provided by the present invention, the circuit includes an addressing unit 1, a voltage-controlled current source unit 2, a branch control unit 3, a zeroing unit 4, and a main light-emitting device 208 and spare lighting device 212.

[0043] Wherein, the addressing unit 1 is used for charging the capacitive ...

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Abstract

The invention discloses a fault-tolerance circuit for an organic electroluminescence display/illumination device, comprising an addressing unit, a pressure-controlled current resource unit, a branch control unit, a zero setting unit, a main illumination device and a standby illumination device, wherein, the addressing unit is used for charging a capacitor member in the pressure-controlled current resource unit and setting a gate source voltage of a current resource transistor in the pressure-controlled current resource unit; the pressure-controlled current resource unit is used for providing power to the branch control unit; the branch control unit is used for receiving a constant current signal from the pressure-controlled current resource unit and judging the work states of a first switch transistor and a second switch transistor of the branch control unit; the zero setting unit is used for judging whether the first switch transistor in the branch control unit is grounded and making the first switch transistor work normally. According to the invention, the problem of asymmetry lightness resulted from a short circuit fault of pixel points during the using process of the display device or the illumination device is solved, and the lightness and power consumption of the device is maintained.

Description

technical field [0001] The invention relates to the field of organic electroluminescent display technology, in particular to a fault-tolerant circuit for organic electroluminescent display / illumination devices to drive pixels of organic electroluminescent components. Background technique [0002] An organic electroluminescent (OLED) device includes a layer of light-emitting material sandwiched between an anode layer and a cathode layer. Electrically, this component works like a diode. Optically, it emits light of the color associated with the luminescent material when forward biased, and the brightness increases with increasing forward bias current. It is possible to construct a display plane or a large-area lighting device with a matrix of OLED elements, which is manufactured on a transparent substrate with at least one transparent electrode layer, and it is also possible to drive the The circuits are integrated on the same screen. [0003] Such as figure 1 as shown, f...

Claims

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Application Information

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IPC IPC(8): G09G3/14G09G3/32H05B37/04G09G3/3233G09G3/3275
Inventor 李大勇刘明
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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