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Self-heating drive circuit for AMOLED and heating method and device of self-heating drive circuit

A technology of driving circuit and heating method, which is applied in the field of circuit, can solve the problems of increasing pixel size and design complexity, etc., and achieve the effect of increasing external components and improving design complexity

Inactive Publication Date: 2021-03-16
深圳市智联汇网络系统企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a self-heating drive circuit for AMOLED and its heating method and device, so as to solve the problems in the prior art that applying a bias voltage to a pixel will lead to design complexity and increase the pixel size.

Method used

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  • Self-heating drive circuit for AMOLED and heating method and device of self-heating drive circuit
  • Self-heating drive circuit for AMOLED and heating method and device of self-heating drive circuit
  • Self-heating drive circuit for AMOLED and heating method and device of self-heating drive circuit

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Experimental program
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Embodiment 1

[0042] refer to Figure 1-2 As shown, a self-heating driving circuit for AMOLED includes: a light-emitting module 11 , a first driving module 12 , a second driving module 13 , and a temperature control module 14 .

[0043] The light-emitting module 11 includes an OLED light-emitting device D1, such as an OLED pixel, and each OLED pixel should contain at least three color sub-pixels.

[0044] In the present invention, the first driving module 12 is connected to the light-emitting module 11 and provides driving signals. Generally, the first driving module 12 includes a first transistor Q1 and a capacitor C1 arranged in parallel, and is set by the voltage of the first transistor Q1 The magnitude of the current in the light-emitting module 11, wherein the first transistor Q1 is preferably an NMOS transistor. In this example, the first driving module 12 also includes a transmission channel structure composed of a transistor Q2 and a transistor Q3 acting as a switch to form an acce...

Embodiment 2

[0050] refer to image 3 As shown, the present invention also provides a heating method for AMOLED, comprising the following steps:

[0051] S01, obtaining the operating temperature of the light-emitting module;

[0052] S02, determine whether the use temperature is lower than the preset threshold temperature; if not, step S04; if so, enter step S03;

[0053] S03, adjust the voltage of the second driving module, so that the current of the first driving module increases, and start to heat the light-emitting module and its surroundings, so that the use temperature of the light-emitting module is higher than the preset threshold temperature, and return to step S02;

[0054] S04 , adjust the voltage of the second driving module to reduce the current of the first driving module, stop heating the light-emitting module and its surroundings, and end the current cycle.

[0055] Among them, the threshold temperature is between 10°C and -50°C. In order to achieve the best performance o...

Embodiment 3

[0060] A display device includes the self-heating driving circuit for AMOLED of Embodiment 1.

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Abstract

The invention relates to a self-heating driving circuit for an AMOLED, and the circuit comprises a light-emitting module which comprises an OLED light-emitting device; a first driving module connectedwith the light emitting module and providing a driving signal; a temperature control module used for monitoring the temperature of the light-emitting module; and a second driving module connected between the first driving module and the anode of the light-emitting module, receiving the signal of the temperature control module, adjusting the voltage of the first driving module, and enabling the resistive film located above the light-emitting module to start or stop heating. The self-heating driving circuit for an AMOLED has the beneficial effects that on the basis of the existing design, the bias transistor is fixedly added to the OLED pin, and the voltage is adjusted through the first driving module and the second driving module, so that the self-heating function is realized, the AMOLED micro display is applied to a wider temperature range (-50-70 DEG C). There is no need to increase design complexity, increase external elements or limit pixel size reduction in the prior art.

Description

technical field [0001] The present invention relates to the technical field of circuits, in particular to a self-heating driving circuit for AMOLED and a heating method and device thereof. Background technique [0002] Large changes in temperature below 0°C of organic light-emitting display (OLED) devices can significantly alter their current-voltage characteristics. It is currently achieved by applying the required bias voltage to all pixels and connecting to the zero potential of the silicon substrate. This method can realize the use of AMOLED microdisplay chips in a wide temperature range (-50 to 70 °C). capability, but increases design complexity, adds additional external components, and prevents further reductions in pixel size. SUMMARY OF THE INVENTION [0003] The present invention provides a self-heating driving circuit for AMOLED, a heating method and a device thereof, so as to solve the problems in the prior art that applying a bias voltage to a pixel will cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3225H05B1/02H05B3/14
CPCG09G3/3225H05B1/02H05B3/141
Inventor 孙浩李牧词茆胜
Owner 深圳市智联汇网络系统企业(有限合伙)
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