Power supply chip and display device

Abstract

The invention provides a power supply chip and a display device. The power supply chip comprises a current detection module, a storage module, a control module and a voltage output module. The current detection module is used for detecting current required by a frame of image to be displayed on an OLED display panel; the storage module is used for storing correspondence relationship between the current and voltage; the control module is used for obtaining voltage corresponding to the current detected by the current detection module according to the correspondence relationship stored in the storage module, and sending a control signal to the voltage output module according to the obtained voltage; and the voltage output module is used for outputting a first supply voltage or a second supply voltage to the OLED display panel according to the control signals. The purpose of saving power consumption can be achieved under the condition of not influencing normal display of the OLED display panel, and meanwhile, the power supply chip can realize adjustment of the output voltage of the OLED display panel without control of a driving IC, and adjustment of the input voltage of the OLED display panel is simplified.

Description

technical field [0001] The invention relates to the display field, in particular to a power chip and a display device. Background technique [0002] Organic light-emitting diode (OLED) display panels have gradually become the mainstream in the display field due to their excellent performances such as low power consumption, high color saturation, wide viewing angle, thin thickness, and flexibility. [0003] OLED is a current-driven device, which adjusts the degree of luminescence according to the magnitude of the current, thereby displaying different color information, and the corresponding relationship between the degree of luminescence and the magnitude of the current is determined by the characteristics of the luminescent material itself. Each material The characteristics of the OLED display panel are all fixed. The driving voltage of the OLED display panel is provided by the power chip (DC-DC circuit), but the current that actually flows through the light-emitting diode i...

AI Technical Summary

Problems solved by technology

[0004] At present, the general control method is to use the driver IC to detect the data information of each frame of image, to obtain the maximum current value required to drive the OLED display panel, and then determine the corresponding voltage according to the maximum current value, and use the s-wire protocol form The control information is fed back to the power chip, and the power chip adjusts the magnitude of the negative voltage by detecting the number of pulses. This control method is cumbersome and requires more information interaction between the power chip and the driver IC.

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