US 11,699,384 B2 · Display device

Abstract

A display device can include a display panel having a plurality of pixels disposed on a substrate, and a power supplier configured to supply a driving voltage to the display panel. The power supplier can include a first converter configured to receive an input voltage supplied from an external system and convert the input voltage into a boost voltage, a second converter configured to convert the boost voltage into the driving voltage, a first feedback unit configured to output a first pulse width modulation (PWM) signal to the first converter so that the boost voltage is proportional to a first reference voltage, and a second feedback unit configured to output a second PWM signal to the second converter so that the driving voltage is proportional to a second reference voltage.

Claims20

Dependent claims

A display device comprising:

a display panel including a plurality of pixels disposed on a substrate;
and
a power supplier configured to supply a driving voltage to the display panel,
wherein the power supplier comprises:
a first converter configured to receive an input voltage supplied from an external system and convert the input voltage into a boost voltage;
a second converter configured to convert the boost voltage into the driving voltage;
a first feedback unit configured to output a first pulse width modulation (PWM) signal to the first converter so that the boost voltage is proportional to a first reference voltage;
a second feedback unit configured to output a second PWM signal to the second converter so that the driving voltage is proportional to a second reference voltage;
and
a reference voltage calculator configured to receive the input voltage and the driving voltage and supply the first reference voltage to the first feedback unit.

7 more elements

A display device comprising:

a display panel including a plurality of pixels disposed on a substrate;
and
a power supplier configured to supply a driving voltage to the display panel,
wherein the power supplier comprises:
a first converter configured to convert an input voltage, which is supplied from an external system, into a boost voltage;
a second converter configured to convert the boost voltage into the driving voltage;
a first feedback unit configured to control the first converter so that the first converter outputs the boost voltage;
a second feedback unit configured to control the second converter so that the second converter outputs the driving voltage;
and
a feedback voltage calculator configured to calculate a feedback voltage from the input voltage and the driving voltage,
wherein the first feedback unit includes a plurality of resistors, a first amplifier, and a first pulse width modulator (PWM) generator,
wherein a first reference voltage is applied to a non-inverting terminal of the first amplifier,
wherein an inverting terminal of the first amplifier is connected to the feedback voltage calculator through any one of the plurality of resistors, and
wherein the first PWM generator is configured to output a first PWM signal to the first converter so that the boost voltage is proportional to the first reference voltage.

11 more elements

Dependencies are inferred from the claim text.

Display device

Life of this patent

Display device

Life of this patent

Abstract

Claims20