DC-DC CONVERTER AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME
First Claim
1. A DC-DC converter, comprising:
- a converting module comprising;
a switching module that includes a plurality of switches, each of the plurality of switches converting an input voltage into a first voltage and outputting the first voltage while being turned on or off in response to a corresponding pulse width modulation (PWM) signal, anda control module that controls a switching operation of the switching module by generating the PWM signal; and
a sensing unit that senses driving current supplied to a load to which the first voltage is provided, wherein the control module is configured to adaptively control the frequency of the PWM signal according to a sensed result of the sensing unit.
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Abstract
There are provided a DC-DC converter and an organic light emitting display device using the same. A DC-DC converter includes a converting module and a sensing unit. The converting module includes a switching module and a control module. The switching module has a plurality of switches, and each of the plurality of switches converts an input voltage into a first voltage and outputs the first voltage while being turned on/off in response to a corresponding pulse width modulation (PWM) signal. The control module controls a switching operation of the switching module by generating the PWM signal. The sensing unit senses driving current supplied to a load to which the first voltage is provided.
49 Citations
21 Claims
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1. A DC-DC converter, comprising:
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a converting module comprising; a switching module that includes a plurality of switches, each of the plurality of switches converting an input voltage into a first voltage and outputting the first voltage while being turned on or off in response to a corresponding pulse width modulation (PWM) signal, and a control module that controls a switching operation of the switching module by generating the PWM signal; and a sensing unit that senses driving current supplied to a load to which the first voltage is provided, wherein the control module is configured to adaptively control the frequency of the PWM signal according to a sensed result of the sensing unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An organic light emitting display device, comprising:
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a display panel that has a plurality of pixels, and displays a gray scale according to the luminance of an organic light emitting diode in each pixel; a timing controller that provides the display panel with scan and data signals for allowing the organic light emitting diode in each pixel to emit light; and a DC-DC converter that receives an input voltage so as to generate first and second voltages for supplying current to the organic light emitting diode and to provide the first and second voltages to the display panel, wherein the DC-DC converter comprises; a first converting module that receives the input voltage so as to generate the first voltage; a second converting module that receives the input voltage so as to generate the second voltage; and a sensing unit that senses driving current supplied to the display panel, wherein each of the first and second converting modules comprises; a switching module that has a plurality of switches, each of the plurality of switches converting an input voltage into a first voltage and outputting the first voltage while being turned on or off in response to a corresponding PWM signal; and a control module that controls a switching operation of the switching module by generating the PWM signal, wherein at least one of the control modules of the first and second converting modules is configured to adaptively control the frequency of the PWM signal according to the sensed result of the sensing unit. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification