DC boost circuit and DC boost method

Abstract

The invention provides a DC boosting circuit and a DC boosting method. The DC boost circuit of the present invention includes an inductor, a diode, a first capacitor, a first field effect transistor, a first voltage conversion unit, a voltage drop detection module, a reference voltage adjustment module and a control module. After the load is connected, the voltage drop detection module obtains the current flowing through the diode and outputs the corresponding second voltage to the reference voltage adjustment module, so that the voltage output by the reference voltage adjustment module is greater than the original reference voltage, and the control module controls the first field The increase of the ratio of the on-time length to the off-time length of the effect tube in the period of completing a turn-on and cut-off time increases the voltage value of the output voltage, thereby compensating the voltage drop of the output voltage caused by the impedance and ensuring the voltage level of the output voltage is stable. .

Description

technical field [0001] The invention relates to the field of display technology, in particular to a DC boost circuit and a DC boost method. Background technique [0002] Organic light emitting diode (Organic Light Emitting Display, OLED) display device has self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide operating temperature range, and can realize flexible display and With many advantages such as large-area full-color display, it is recognized by the industry as a display device with the most potential for development. [0003] OLED display devices can be divided into passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED) two categories according to the driving method, namely direct addressing and thin film transistor (Thin Film Transistor, TFT) matrix addressing two types. Among them, AMOLED has pixels arranged in an array, be...

AI Technical Summary

Problems solved by technology

When the OLED display displays different pictures, the load current of the DC boost circuit is different, so the positive voltage of the power supply received by the pixel drive circuit is different, which will affect the current of the organic light-emitting diode flowing through each pixel, and then affect the display quality of the OLED display.

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