Display control circuit and device

Abstract

The invention relates to a display control circuit and device. The display control circuit comprises a resistance adjusting assembly and at least two light-emitting units, wherein the first end of theresistance adjusting assembly is connected to an external power supply port; the second end of the resistance adjusting assembly is grounded; each light-emitting unit comprises a switch tube and a light-emitting assembly; the control end of the switch tube is connected with the output end of the resistance adjusting assembly; the first end of the switch tube is grounded; the second end of the switch tube is connected with the negative electrode of the light-emitting assembly, and the positive electrode of the light-emitting assembly is connected into an external power port; the light-emittingunit is used for indicating the working state of the electric appliance; the resistance value of the switch tube connected to the display control circuit is adjusted through the resistance adjustingassembly, so that the voltage is adjusted, and the conduction of the switch tube of the light emitting unit can be controlled; the light emitting assembly is controlled to emit light to indicate the working state of an electric appliance; and the display control device can realize display control through pure hardware without adding an MCU, and the cost can be reduced.

Description

technical field

[0001] The present application relates to the technical field of display control, in particular to a display control circuit and equipment. Background technique

[0002] At present, the controllers of household appliances are mostly a main control board and a display control board. The main control board and the display board each have at least one MCU. The communication method is used to transmit information to control the good work of the electrical appliances, which can reduce the distance between the two control boards. The number of connections between them to reduce costs and enhance anti-interference ability. The MCU on the main control board controls the working status of the product, including various load work and load status detection functions; the MCU on the display control board is electrically connected to the MCU on the main control board to communicate, exchange status information, and display the control board at the same time The MCU on th...

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