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DC driving voltage regulation device and method, power supply device and display panel

A technology of DC driving voltage and DC voltage, applied in lighting devices, electric lamp circuit layout, electric light source and other directions, can solve problems such as affecting display uniformity, and achieve the effect of display uniformity

Active Publication Date: 2014-09-10
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resistance of the lead wire from the DC voltage generating unit to the effective display area usually has several ohms, so that the DC voltage drop between the DC voltage generated by the DC voltage generating unit and the DC driving voltage transmitted to the effective display area ranges from 0 to several ohms. Hundreds of millivolts, so the DC voltage drop on this lead will cause changes in the DC drive voltage, thereby affecting the uniformity of the display

Method used

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  • DC driving voltage regulation device and method, power supply device and display panel
  • DC driving voltage regulation device and method, power supply device and display panel
  • DC driving voltage regulation device and method, power supply device and display panel

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specific Embodiment approach

[0050] According to a specific implementation manner, the voltage regulating unit may include:

[0051] The voltage regulation module is used to generate a voltage control signal according to the current, and transmit the voltage control signal to the DC voltage generation unit to control the DC voltage generation unit 10 to generate a corresponding DC voltage, so that the DC voltage transmitted to the effective display area The drive voltage remains unchanged.

[0052] Specifically, such as figure 1As shown, the periphery of the effective display area is provided with a drive integrated circuit and a flexible circuit board, the DC voltage generation unit adopts a DC / DC (direct current-direct current) converter, the current acquisition unit adopts a current sensor, and the resistance marked as R is resistance of the leads;

[0053] In actual operation, the current sensor transmits the detected current I on the lead to the voltage regulation module, and the voltage regulation...

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Abstract

The invention provides a DC driving voltage regulation device and method, a power supply device and a display panel. The DC driving voltage regulation device and method are characterized in that DC driving voltage is transmitted to an effective display area by a DC voltage generating unit through a lead that is arranged outside the effective display area of the display panel; the DC driving voltage regulation unit comprises a current acquiring unit for acquiring current from lead on real time, and a voltage regulating unit for regulating DC voltage generated by the DC voltage generating unit or regulating the resistance of the lead according to the current in order to keep the DC driving voltage unchanging. With the adoption of the DC driving voltage regulation device and method, the power supply device and the display panel, the effective display area is given with unified DC driving voltage, and thus the display uniformity of the display panel is ensured.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a DC driving voltage regulating device and method, a power supply device and a display panel. Background technique [0002] In an AMOLED (Active Matrix / Organic Light Emitting Diode, active organic light emitting diode) display panel, the luminance of the organic light emitting diode (OLED) is exponentially related to the DC driving voltage of the effective display area of ​​the display panel, so in low grayscale In the displayed state, the change of the luminance of the OLED is very sensitive to the change of the DC driving voltage. [0003] In the AMOLED panel, in order to make the organic material emit light, it needs to consume a large current, but the power drive capability of the driver chip is weak, so it cannot provide the corresponding current, and an independent DC voltage generation unit is required. In the AMOLED display panel, the DC driving voltage is transmitted t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32H05B37/02G09G3/3258
CPCY02B20/42G09G3/32Y02B20/40
Inventor 张林涛刘铭
Owner BOE TECH GRP CO LTD
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