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US 9,754,523 B2Granted
Power supply device and display device having the same
AssigneeSamsung Display Co., Ltd.
InventorsYoon-Young Lee, Kwang-Hun Kang, Soon-Gi Kwon, Sung-Chun Park, Jeong-Min Seo
Life of this patent
Estimating the term…
Abstract
A power supply device includes a voltage range selector, a voltage level controller, and a power supply voltage generator. The voltage range selector generates a range selection signal to select a voltage control range. The voltage level controller generates a voltage level control signal based on a driving condition of a display panel. The power supply voltage generator generates a power supply voltage having a voltage level corresponding to the voltage level control signal within the voltage control range, and supplies the power supply voltage to the display panel.
Claims17
A power supply device, comprising:
- a voltage range selector to generate a range selection signal to select a voltage control range;
- a voltage level controller to generate a voltage level control signal based on a driving condition of a display panel;
- and
- a power supply voltage generator to generate a power supply voltage having a voltage level corresponding to the voltage level control signal within the voltage control range, and to supply the power supply voltage to the display panel, wherein the power supply voltage generator includes:
- a pulse counter to count a number of pulses in the voltage level control signal and to output a pulse information signal having information indicative of the counted number of the pulses;
- a candidate power supply voltage generator to receive the pulse information signal from the pulse counter and to generate a plurality of candidate power supply voltages having different voltage levels based on the counted number of the pulses;
- and
- a selector to select one of the candidate power supply voltages as the power supply voltage based on the range selection signal.
5 more elements
A power supply device, comprising:
- a voltage range selector to generate a range selection signal to select a voltage control range;
- a voltage level controller to generate a voltage level control signal based on a driving condition of a display panel;
- and
- a power supply voltage generator to generate a power supply voltage having a voltage level corresponding to the voltage level control signal within the voltage control range, and to supply the power supply voltage to the display panel, wherein the power supply voltage generator includes:
- a pulse counter to count a number of pulses included in the voltage level control signal and to output a pulse information signal having an information of the counted number of the pulses;
- a power supply voltage selection signal supplier to select a reference table among a plurality of tables that respectively output power supply voltage selection signals having different voltage levels with respect to a same number of the pulses, and to supply one of the power supply voltage selection signals from the reference table based on the pulse information signal;
- and
- a digital-to-analog converter to generate the power supply voltage based on the one of the power supply voltage selection signals.
5 more elements
A display device, comprising:
- a display panel including pixels;
- a display panel driver to drive the display panel;
- and
- a power supply device to supply power supply voltages to the display panel, wherein the power supply device includes:
- a voltage range selector to generate a range selection signal selecting a voltage control range;
- a voltage level controller to generate a voltage level control signal based on a driving condition of the display panel;
- and
- a power supply voltage generator to generate a power supply voltage having a voltage level corresponding to the voltage level control signal within the voltage control range and to supply the power supply voltage to the display panel, wherein the power supply voltage generator includes:
- a pulse counter to count a number of pulses in the voltage level control signal and to output a pulse information signal having information indicative of the counted number of the pulses;
- a candidate power supply voltage generator to receive the pulse information signal from the pulse counter and to generate a plurality of candidate power supply voltages having different voltage levels based on the counted number of the pulses;
- and
- a selector to select one of the candidate power supply voltages as the power supply voltage based on the range selection signal.
9 more elements
Dependencies are inferred from the claim text.