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
CN104036727AActive Publication Date: 2014-09-10BOE TECH GRP CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BOE TECH GRP CO LTD
Publication Date
2014-09-10

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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.
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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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