Abstract: An electromagnetic touch-control screen structure, comprising: a display panel; a touch-control plate over the display panel; an electromagnetic induction plate over the touch-control plate; and a cover lens attached on the electromagnetic induction plate. The electromagnetic touch-control screen of the disclosure, by deploying reasonable structure and manufacturing technique, stacks an electromagnetic induction plate with a touch-control plate, a cover lens and a display panel. Compared with existing manufacturing techniques, it can reduce one time of lamination operation, and dramatically decrease the thickness and weight of the electromagnetic structure, so that it can meet the need of lightness and thinness, for touch-control display equipments, like cellphone.

Abstract: An electromagnetic touch-control screen structure, comprising: a display panel; a touch-control plate over the display panel; an electromagnetic induction plate over the touch-control plate; and a cover lens attached on the electromagnetic induction plate. The electromagnetic touch-control screen of the disclosure, by deploying reasonable structure and manufacturing technique, stacks an electromagnetic induction plate with a touch-control plate, a cover lens and a display panel. Compared with existing manufacturing techniques, it can reduce one time of lamination operation, and dramatically decrease the thickness and weight of the electromagnetic structure, so that it can meet the need of lightness and thinness, for touch-control display equipments, like cellphone.

Abstract: A LED driving apparatus having a holding current circuit and an operating method thereof are disclosed. The holding current circuit includes an input terminal, a holding resistor, a regulator, a first resistor, a second resistor, a setup resistor, a control unit, and a transistor. The holding resistor and the regulator, the first resistor and the second resistor, and the transistor and the setup resistor are coupled between the input terminal and ground terminal respectively. The control unit is coupled to the transistor, between the holding resistor and the regulator, and between the first resistor and the second resistor respectively. The control unit receives a first voltage between the holding resistor and the regulator and a second voltage between the first resistor and the second resistor and outputs a control signal to selectively control the transistor off.

Abstract: A LED driving apparatus having a holding current circuit and an operating method thereof are disclosed. The holding current circuit includes an input terminal, a holding resistor, a regulator, a first resistor, a second resistor, a setup resistor, a control unit, and a transistor. The holding resistor and the regulator, the first resistor and the second resistor, and the transistor and the setup resistor are coupled between the input terminal and ground terminal respectively. The control unit is coupled to the transistor, between the holding resistor and the regulator, and between the first resistor and the second resistor respectively. The control unit receives a first voltage between the holding resistor and the regulator and a second voltage between the first resistor and the second resistor and outputs a control signal to selectively control the transistor off.

Abstract: A LED driving apparatus and an operating method thereof are disclosed. The LED driving apparatus includes a controller and an output stage. The output stage includes at least one LED, a switch, and a setup resistor. The at least one LED, the switch, and the setting resistor are coupled in series between an input voltage and ground. The controller is coupled to the input voltage and the switch respectively. The controller receives at least one voltage sensing signal and outputs a setup voltage signal to the output stage. The at least one voltage sensing signal is received from the node between the at least one LED and the switch, between two LEDs, or between two voltage dividing resistors coupled in series between the input voltage and ground.

Abstract: A LED driving apparatus and an operating method thereof are disclosed. The LED driving apparatus includes an output stage, an input resistor, a plurality of voltage dividing resistors, and a control circuit. A first voltage dividing resistor, a second voltage dividing resistor, and a third voltage dividing resistor are coupled between an input voltage and ground in series to divide the input voltage. The control circuit senses a first voltage signal, a second voltage signal, and a third voltage signal between the first voltage dividing resistor and the second voltage dividing resistor, between the second voltage dividing resistor and the third voltage dividing resistor, and the input resistor respectively, and adjusts a setting voltage signal according to the first voltage signal, the second voltage signal, and the third voltage signal.

Abstract: A LED driving apparatus and an operating method thereof are disclosed. The LED driving apparatus includes an output stage, a reference voltage regulator, a first input resistor, a second input resistor, and a controller. The output stage includes at least one LED. The reference voltage regulator is coupled to an input voltage and used to receive the input voltage and output a reference voltage signal. One end of the first input resistor is coupled to a node. One end of the second input resistor is coupled to the node, and the other end of the second input resistor is coupled to ground. The controller receives the reference voltage signal from the reference voltage regulator and receives a divided voltage signal from the node respectively, and outputs a setting voltage signal to the output stage.

Abstract: A LED driving apparatus includes an output stage, an input resistor, a plurality of voltage dividing resistors, and a control circuit. The output stage includes at least one LED. A first voltage dividing resistor, a second voltage dividing resistor, and a third voltage dividing resistor are coupled between a specific voltage and ground in series to divide the specific voltage. A LED current passing through the LED has a duty cycle changed with the specific voltage. The control circuit senses a first voltage signal, a second voltage signal, and a third voltage signal between the first voltage dividing resistor and the second voltage dividing resistor, between the second voltage dividing resistor and the third voltage dividing resistor, and the input resistor respectively, and adjusts a setting voltage signal according to the first voltage signal, the second voltage signal, and the third voltage signal.