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Power supply circuit and display device
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A technology of power supply circuit and circuit, which is applied in the direction of output power conversion device, electrical components, and adjustment of electric variables, etc., and can solve problems such as unstable power supply voltage of power supply circuit
Active Publication Date: 2020-12-08
FUZHOU BOE OPTOELECTRONICS TECH CO LTD +1
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[0003] The present invention at least partly solves the problem of unstable power supply voltage of the power supply circuit of the existing drive circuit of the display panel, and provides a power supply circuit and a display device
Method used
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Embodiment 1
[0021] to combine Figure 1-Figure 3 , this embodiment provides a power supply circuit, the power supply circuit includes a power supply voltage output terminal Vo, and the power supply voltage output terminal Vo is used to supply power to the driving circuit of the display panel. The display panel is, for example, a liquid crystal display panel, a light emitting diode display panel, or the like. The driving circuit is, for example, a display driving chip or the like. Taking a display driver chip of an OLED display panel as an example, the driver chip usually has multiple power supply voltage input terminals. In specifications (Specs) of some display driver chips, these power supply voltage input terminals are marked as AVDD, HAVDD, VCC, etc., for example.
[0022] The power supply circuit includes a control module 1 , a switch module 2 , a voltage generating module 3 and an adaptive adjustment module 4 .
[0023] Specifically, the control module 1 has a control signal outp...
Embodiment 2
[0058] This embodiment provides a display device, including a display panel, a drive circuit for driving the display panel, and a power supply circuit. The drive circuit has a power supply voltage input terminal, the power supply circuit has a power supply voltage output terminal, and the power supply voltage input terminal is connected to the power supply voltage output terminal. The power supply circuit is the power supply circuit according to Embodiment 1.
[0059] Specifically, the display device can be any product or component with a display function such as a liquid crystal display module, an organic light emitting diode (OLED) display module, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc. .
[0060] Since the power supply voltage provided by the power supply circuit in Embodiment 1 is more stable, when the display panel displays a heavy-duty picture, the display quality can also be guaranteed.
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Abstract
The invention provides a power supply circuit and a display device, belongs to the technical field of display and can at least partially solve a problem of unstable power supply voltage when an existing display device displays a heavy load picture. The power supply circuit is characterized in that a control module is configured to determine whether a current display picture is a heavy load pictureor not, if yes, a first signal is outputted to a switch module, if not, a second signal is outputted to the switch module, the switch module is configured to communicate an initial voltage output endwith the power supply voltage output end under the condition that the second signal is received, and the initial voltage output end is communicated with the power supply voltage output end through aself-adaptive adjustment module under the condition that the first signal is received, and the adaptive adjustment module is configured to perform negative feedback adjustment of the voltage of the power supply voltage output end so as to stabilize the voltage of the power supply voltage output end within a preset voltage range.
Description
technical field [0001] The invention belongs to the field of display technology, and in particular relates to a power supply circuit and a display device. Background technique [0002] In a display device, usually a power supply circuit supplies power to a power port of a driving circuit (eg, a display driving chip). The driver chip further drives the display panel to display. The images displayed on the display panel are different, and the overall energy consumption of the driver chip is also different. For a specific display image (called a heavy-duty image), the energy consumption required is too large. If the power supply capacity of the power supply circuit is insufficient, the voltage provided by the power supply circuit to the power port of the driver chip will drop. This results in insufficient driving capability of the driver chip, which in turn leads to abnormality of the display screen. How to improve the stability of the power supply voltage to the power port ...
Claims
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Application Information
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