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Indicating lamp control circuit for electric facilities, and mobile phone

A technology for electrical equipment and control circuits, applied in the field of mobile communications, can solve the problems of high cost, complex circuits, and difficulty in controlling the current of light-emitting indicating elements, and achieve the effects of reducing production costs, simplifying circuits, and solving different brightness.

Active Publication Date: 2012-07-11
江苏今越控股集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is to provide a control circuit for indicator lights of electrical equipment, aiming to solve the problem that traditional MOSFET (m

Method used

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  • Indicating lamp control circuit for electric facilities, and mobile phone
  • Indicating lamp control circuit for electric facilities, and mobile phone
  • Indicating lamp control circuit for electric facilities, and mobile phone

Examples

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Embodiment Construction

[0022] figure 2 It is a circuit diagram of a preferred embodiment of the present invention, and the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0023] see figure 2 , the present invention provides a control circuit for indicator lamps of electrical equipment, taking mobile phone equipment as an example, including a light-emitting indicator element, the light-emitting indicator element is a light-emitting diode D1, and the circuit also includes a first triode Q1, a second triode The transistor Q2, the third transistor Q3, the fourth transistor Q4, and two voltage input terminals, the battery voltage input terminal VBAT and the charging voltage input terminal VCHG. The anode of the light-emitting diode D1 is connected to the charging voltage terminal VCHG through the first current-limiting resistor R4, and the charging voltage terminal VCHG is connected to the 5V input of the charger or USB, and the c...

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Abstract

The invention provides an indicating lamp control circuit for electric facilities, which comprises a luminous indicating element, a first triode, a triode, a third triode and a fourth triode as well as a related current-limiting and voltage-limiting resistor and a filter capacitor; the negative pole of the luminous indicating element is connected with a collector electrode of the first triode; the base electrode of the first triode is connected with the collector electrode of the second triode; the base electrode of the fourth triode is connected with the collector electrode of the third triode; the base electrode of the second triode is connected with a first input/output interface of an electric facility controller; and the base electrode of the third triode is connected with a second input/output interface of the electric facility controller. A control system controls the on/off of the triodes through controlling the state of high and low level output from the first input/output interface and the second input/output interface, so that the on/off and the current of the luminous indicating element can be controlled orderly. The invention further provides a mobile phone provided with the indicating lamp control circuit for electric facilities.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to an indicator light control circuit of electrical equipment. The invention also relates to a mobile phone equipped with the indicator light control circuit. Background technique [0002] In the current design of electronic appliances, the designer will equip the product with a charging indicator light according to the needs of the user to remind the user that the electrical appliance is in the charging state, especially in the charging of mobile phones. When the battery voltage of the mobile phone is very low, the mobile phone cannot When the phone is turned on, that is, when the mobile phone is pre-charging, the setting of the charging indicator is especially necessary. The mobile phone circuit in the current technology needs to realize the function of the charging indicator light or the breathing light (the light gradually changes from bright to dark), generally us...

Claims

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Application Information

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IPC IPC(8): H05B37/02H04M1/02
Inventor 顾瞻
Owner 江苏今越控股集团有限公司
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