Granted Patent B2

US 12,223,878 · App. 18/480,826 · Granted Feb 11, 2025

Inventors: Chuleun Yun (Suwon-si, KR); Yunhui Han (Suwon-si, KR)

Assignee: Samsung Electronics Co., Ltd.

G09G3/2092G09G3/3233H02M1/0045H02M3/07G09G2300/0819G09G2300/0842G09G2330/028G09G2370/00

Abstract

Claims (101)

1. An electronic device comprising:

an organic light emitting display device comprising:

a display panel comprising a plurality of gate lines, a plurality of data lines, and a plurality of pixels; and

a display driver integrated circuit (IC) (DDI) configured to drive the display panel; and

a display power management IC (PMIC) configured to generate a voltage necessary for driving the display driver IC,

wherein the display PMIC comprises:

a first regulator configured to output a first voltage resulting from conversion of a size of an input voltage inputted to the display PMIC, and

a second regulator configured to output a second voltage resulting from inversion of a phase of the input voltage and conversion of the size, and

wherein the display driver IC is configured to:

receive at least one of the first voltage or the second voltage,

output, to the display panel, a third voltage in which the phase of the input voltage is maintained based on the first voltage, and

output, to the display panel, a fourth voltage in which the phase of the input voltage is inverted based on the second voltage.

2. The electronic device of claim 1 ,

wherein the first regulator comprises a boost regulator, and

wherein the second regulator comprises at least one of a buck-boost converter or a Cuk converter.

3. The electronic device of claim 1 , further comprising:

at least one processor electrically connected with the display panel, the display PMIC, and the display driver IC,

wherein the display PMIC further comprises a charge pump configured to output a voltage having an inverted phase on the input voltage, and

wherein the at least one processor is configured to:

determine the first voltage to be outputted through the first regulator and the second voltage to be outputted through the second regulator,

convert an input voltage supplied through the first regulator into the first voltage,

determine whether a size of the determined first voltage and a size of the second voltage are the same,

when the size of the first voltage and the size of the second voltage are the same, disable the second regulator and enable the charge pump,

supply the converted first voltage to the charge pump,

convert the first voltage supplied through the charge pump into the second voltage which has a same size as that of the first voltage and has an inverted phase, and

output the second voltage to the display driver IC.

4. The electronic device of claim 3 , wherein the at least one processor is further configured to enable the second regulator to output the second voltage in response to it being determined that the size of the first voltage and the size of the second voltage are different.

5. The electronic device of claim 1 ,

wherein the display driver IC further comprises at least one regulator, and

wherein the display driver IC is configured to:

convert the first voltage into the third voltage by stepping down the first voltage through the at least one regulator, or

convert the second voltage into the fourth voltage by stepping down the second voltage.

6. The electronic device of claim 5 , wherein the at least one regulator included in the display driver IC comprises a low voltage dropout (LDO) regulator.

7. The electronic device of claim 5 ,

wherein the third voltage comprises a transistor off voltage (voltage of gate high (VGH)), and

wherein the fourth voltage comprises at least one of a transistor on voltage (voltage of gate low (VGL)) or a negative initialization voltage (VINT_N).

8. The electronic device of claim 1 , further comprising:

a communication circuit which uses at least one communication method of V×1 communication, inter-integrated circuit (I2C) communication, universal asynchronous receiver-transmitter (UART) communication, general purpose input and output (GPIO) communication, transition minimized differential signaling (TMDS) communication,

wherein the display driver IC is configured to transmit, to the display PMIC through the communication circuit, a control signal which includes at least one of the first voltage converted by the first regulator or the second voltage converted by the second regulator.

9. An organic light emitting display device comprising:

a display panel comprising:

a plurality of gate lines,

a plurality of data lines, and

a plurality of pixels;

a display driver integrated circuit (IC) (DDI) configured to drive the display panel; and

a display power management IC (PMIC) configured to generate a voltage necessary for driving the display driver IC,

wherein the display PMIC comprises:

a first regulator configured to output a first voltage resulting from conversion of a size of an input voltage inputted to the display PMIC, and

a second regulator configured to output a second voltage resulting from inversion of a phase of the input voltage and conversion of the size, and wherein the display driver IC is configured to

receive at least one of the first voltage or the second voltage,

output, to the display panel, a third voltage in which the phase of the input voltage is maintained based on the first voltage, and

output, to the display panel, a fourth voltage in which the phase of the input voltage is inverted based on the second voltage.

10. The organic light emitting display device of claim 9 ,

wherein the first regulator comprises a boost regulator, and

wherein the second regulator comprises at least one of a buck-boost converter or a Cuk converter.

11. The organic light emitting display device of claim 9 , further comprising:

at least one processor electrically connected with the display panel, the display PMIC, and the display driver IC,

wherein the display PMIC further comprises a charge pump configured to output a voltage having an inverted phase on the input voltage, and

wherein the at least one processor is configured to:

determine the first voltage to be outputted through the first regulator and the second voltage to be outputted through the second regulator,

convert an input voltage supplied through the first regulator into the first voltage,

determine whether a size of the determined first voltage and a size of the second voltage are the same,

when the size of the first voltage and the size of the second voltage are the same, disable the second regulator and enable the charge pump,

supply the converted first voltage to the charge pump,

convert the first voltage supplied through the charge pump into the second voltage which has a same size as that of the first voltage and has an inverted phase, and

output the second voltage to the display driver IC.

12. The organic light emitting display device of claim 11 , wherein the at least one processor is further configured to enable the second regulator to output the second voltage in response to it being determined that the size of the first voltage and the size of the second voltage are different.

13. The organic light emitting display device of claim 9 ,

wherein the display driver IC further comprises at least one regulator,

wherein the display driver IC is configured to:

convert the first voltage into the third voltage by stepping down the first voltage through the at least one regulator, or

convert the second voltage into the fourth voltage by stepping down the second voltage, and

wherein the at least one regulator comprises a low voltage dropout (LDO) regulator.

14. The organic light emitting display device of claim 13 ,

wherein the third voltage comprises a transistor off voltage (voltage of gate high (VGH)), and

wherein the fourth voltage comprises at least one of a transistor on voltage (voltage of gate low (VGL)) or a negative initialization voltage (VINT_N).

15. The organic light emitting display device of claim 9 , further comprising:

a communication circuit which uses at least one communication method of V×1 communication, inter-integrated circuit (I2C) communication, universal asynchronous receiver-transmitter (UART) communication, general purpose input and output (GPIO) communication, transition minimized differential signaling (TMDS) communication,

wherein the display driver IC is configured to transmit, to the display PMIC through the communication circuit, a control signal which includes at least one of the first voltage converted by the first regulator or the second voltage converted by the second regulator.

16. At least one non-transitory computer readable storage medium storing one or more programs including instructions, which when executed by a processor of an electronic device, perform a method of:

outputting, by a first regulator of a display power management integrated circuit (IC) (PMIC) included in the electronic device, a first voltage resulting from conversion of a size of an input voltage inputted to the PMIC;

outputting, by a second regulator of the PMIC, a second voltage resulting from inversion of a phase of the input voltage and conversion of the size;

receiving, by a display driver IC (DDI) of a display included in the electronic device, at least one of the first voltage or the second voltage;

outputting, to a display panel, a third voltage in which the phase of the input voltage is maintained based on the first voltage; and

outputting, to the display panel, a fourth voltage in which the phase of the input voltage is inverted based on the second voltage.

17. The at least one non-transitory computer readable storage medium of claim 16 ,

wherein the first regulator comprises a boost regulator, and

wherein the second regulator comprises at least one of a buck-boost converter or a Cuk converter.

18. The at least one non-transitory computer readable storage medium of claim 16 , further comprising:

determining the first voltage to be outputted through the first regulator and the second voltage to be outputted through the second regulator;

converting an input voltage supplied through the first regulator into the first voltage;

determining whether a size of the determined first voltage and a size of the second voltage are the same;

when the size of the first voltage and the size of the second voltage are the same, disabling the second regulator and enabling a charge pump;

supplying the converted first voltage to the charge pump;

converting the first voltage supplied through the charge pump into the second voltage which has a same size as that of the first voltage and has an inverted phase; and

outputting the second voltage to the display driver IC.

19. The at least one non-transitory computer readable storage medium of claim 18 , further comprising:

enabling the second regulator to output the second voltage in response to it being determined that the size of the first voltage and the size of the second voltage are different.

20. The at least one non-transitory computer readable storage medium of claim 16 , further comprising:

converting, by the display driver IC, the first voltage into the third voltage by stepping down the first voltage through one of the first regulator or the second regulator; or

converting, by the display driver IC, the second voltage into the fourth voltage by stepping down the second voltage.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (34)

Cited By (1)

US 12,519,384