LED lamp used for illuminating computer keyboard for short time

Abstract

The invention discloses an LED lamp used for illuminating a computer keyboard for short time. The LED lamp comprises a relay K, a resistor R1, a unidirectional thyristor Q1, an electrode slice M and a light emitting diode D1, wherein one end of the resistor R1 is connected with a contact K-1 of the relay K and a positive voltage output terminal 1 of a USB interface J1, the other end of the contact K-1 of the relay K is connected with the anode of the light emitting diode D1, and the cathode of the light emitting diode D1 is connected with a resistor R6. The LED lamp used for illuminating the computer keyboard for short time has the advantages that a circuit is formed by adopting basic electronic components only, a USB interface of a computer is utilized for supplying power, power consumption of the circuit is extremely low when not being used at ordinary time, the light emitting diode can be lightened for short time only by lightly touching the electrode slice when the LED lamp is used, the keyboard is illuminated, the circuit realizes a power failure alarm function under the condition that a storage battery is not used, and inspection of a USB port can be assisted, so that the LED lamp disclosed by the invention has the advantages of diverse functions, electrical energy conservation and convenience in application.

Description

technical field [0001] The invention relates to a lighting lamp, in particular to an LED lamp used for short-time lighting of a computer keyboard. Background technique [0002] The computer is one of the most commonly used office and entertainment equipment for people. Many people have encountered such problems in the process of using the computer. It is easy to use the computer in a dark environment (for example, the university dormitory is still playing with the computer after turning off the lights at night) There is a situation where the specific items on the keyboard cannot be found, resulting in typos or wrong commands, which brings great inconvenience. Therefore, at this time, the lamp is required for short-term lighting to help users see the keyboard logo clearly in a short time. , and there is no need to turn on the lights for a long time so as not to disturb other people's rest. Contents of the invention [0003] The object of the present invention is to provide...

AI Technical Summary

Problems solved by technology

[0002] The computer is one of the most commonly used office and entertainment equipment for people. Many people have encountered such problems in the process of using the computer. It is easy to use the computer in a dark environment (for example, the university dormitory is still playing with the computer after turning off the lights at night) There is a situation where the specific items on the keyboard cannot be found, resulting in typos or wrong commands, which brings great inconvenience. Therefore, at this time, the lamp is required for short-term lighting to help users see the keyboard logo clearly in a short time. , and there is no need to turn on the lights for a long time so as not to disturb other people's rest

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