Driving method for display panel and driving device thereof

Patent metadata

Field	Value
Publication number	US-11335282-B2
Application number	US-201816461367-A
Country	US
Kind code	B2
Filing date	Nov 13, 2018
Priority date	Oct 30, 2018
Publication date	May 17, 2022
Grant date	May 17, 2022

Abstract

Provided are a driving method for a display panel and a driving device thereof. The driving method includes: dividing pixels into bright pixels and dark pixels that are in a cross arrangement; converting driving signals into bright region driving signals and dark region driving signals; and driving the bright pixels and the dark pixels respectively by using the bright region driving signals and the dark region driving signals.

First claim

What is claimed is:

1. A driving method for a display panel, comprising steps of:
dividing all pixels into bright pixels and dark pixels, the bright pixels and the dark pixels being in a cross arrangement;
converting driving signals into bright region driving signals obtained based on a bright region gamma curve and dark region driving signals obtained based on a dark region gamma curve; and
driving the bright pixels and the dark pixels respectively by using the bright region driving signals and the dark region driving signals;
wherein the step of converting driving signals into bright region driving signals obtained based on a bright region gamma curve and dark region driving signals obtained based on a dark region gamma curve comprises:
converting the driving signals into bright region driving signals and dark region driving signals by using a display lookup table;
wherein the display lookup table is generated based on four primary color signals, a bright, a bright region gamma curve, and a dark region gamma curve; and
an average value of the generated bright region driving signals and the generated dark region driving signals is consistent with a front view angle gamma curve target value and a side view angle gamma curve target value.

2. The driving method for a display panel according to claim 1 , wherein the bright pixels and the dark pixels each comprise a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel.

3. The driving method for a display panel according to claim 2 , wherein the step of converting driving signals into bright region driving signals obtained based on a bright region gamma curve and dark region driving signals obtained based on a dark region gamma curve comprises:
receiving three primary color signals and converting the three primary color signals into four primary color signals.

4. The driving method for a display panel according to claim 3 , wherein after the step of receiving three primary color signals and converting the three primary color signals into four primary color signals, the method further includes converting the four primary color signals into bright region four primary color signals based on the bright region gamma curve; and meanwhile, converting the four primary color signals into dark region four primary color signals based on the dark region gamma curve.

5. The driving method for a display panel according to claim 4 , wherein
the step of receiving three primary color signals and converting the three primary color signals into four primary color signals comprises:
the three primary color signals comprising an R signal, a G signal, and a B signal;
the four primary color signals comprising a W signal, an R′ signal, a G′ signal, and a B′ signal;
wherein the W signal being equal to a minimum value among the R signal, the G signal, and the B signal;
the R′ signal being the R signal minus the W signal;
the G′ signal being the G signal minus the W signal;
the B′ signal being the B signal minus the W signal;
the W signal, the R′ signal, the G′ signal, and the B′ signal are four primary color signals obtained by converting the three primary color signals; and
the step of converting the four primary color signals into bright region four primary color signals based on the bright region gamma curve; and meanwhile, converting the four primary color signals into dark region four primary color signals based on the dark region gamma curve comprises:
converting the W signal, the R′ signal, the G′ signal, and the B′ signal to bright region driving signals comprising a W1 signal, an R1 signal, a G1 signal, and a B1 signal, and dark region driving signals comprising a W2 signal, an R2 signal, a G2 signal, and a B2 signal based on a display lookup table.

6. The driving method for a display panel according to claim 5 , wherein the front view angle gamma curve target value is 2.2, and the side view angle gamma curve target value is at least 1.2 and no more than 2.2; and an average value of the bright region driving signals comprising the W1 signal, the R1 signal, the G1 signal, and the B1 signal, and the dark region driving signals comprising the W2 signal, the R2 signal, the G2 signal, and the B2 signal is consistent with a front view angle gamma curve target value and a side view angle gamma curve target value.

7. A driving method for a display panel, comprising steps of:
dividing all pixels each comprising a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel into bright pixels and dark pixels, the bright pixels and the dark pixels being in a cross arrangement;
receiving three primary color signals comprising an R signal, a G signal, and a B signal, and converting the three primary color signals into four primary color signals comprising a W signal, an R′ signal, a G′ signal, and a B′ signal;
wherein the W signal being equal to a minimum value among the R signal, the G signal, and the B signal;
the R′ signal being the R signal minus the W signal;
the G′ signal being the G signal minus the W signal;
the B′ signal being the B signal minus the W signal;
converting the W signal, the R′ signal, the G′ signal, and the B′ signal to bright region driving signals comprising a W1 signal, an R1 signal, a G1 signal, and a B1 signal, and dark region driving signals comprising a W2 signal, an R2 signal, a G2 signal, and a B2 signal based on a display lookup table;
driving the bright pixels and the dark pixels respectively by using the bright region driving signals comprising the W1 signal, the R1 signal, the G1 signal, and the B1 signal, and the dark region driving signals comprising the W2 signal, the R2 signal, the G2 signal, and the B2 signal;
wherein the display lookup table is generated based on four primary color signals, a bright region gamma curve, and a dark region gamma curve; an average value of the generated bright region driving signals and the generated dark region driving signals is consistent with a front view angle gamma curve target value and a side view angle gamma curve target value; the front view angle gamma curve target value is 2.2, and the side view angle gamma curve target value is at least 1.2 and no more than 2.2.

8. A driving device for a display panel, comprising: a driver; the driver comprises:
a dividing circuit that divides all pixels into bright pixels and dark pixels, the bright pixels and the dark pixels being in a cross arrangement;
a conversion circuit that converts driving signals into bright region driving signals obtained based on a bright region gamma curve and dark region driving signals obtained based on a dark region gamma curve; and
a driving circuit that drives the bright pixels and the dark pixels respectively by using the bright region driving signals and the dark region driving signals;
wherein the conversion circuit comprises a display lookup table that converts the driving signals into bright region driving signals and dark region driving signals;
wherein the display lookup table is generated based on four primary color signals, a bright region gamma curve, and a dark region gamma curve; and
an average value of the bright region driving signals and the dark region driving signals is consistent with a front view angle gamma curve target value and a side view angle gamma curve target value.

9. The driving device for a display panel according to claim 8 , wherein the bright pixels and the dark pixels each comprise a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel.

10. The driving device for a display panel according to claim 9 , wherein the conversion circuit receives three primary color signals and converts the received three primary color signals into f

Assignees

• Hkc Corp Ltd

Inventors

• Lee Chia-Hang

Classifications

• G09G3/3648 Primary

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• G09G2300/0443

  with several sub-pixels for the same colour in a pixel, not specifically used to display gradations (G09G3/364 takes precedence) · CPC title

• G09G3/3607 Primary

  for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127) · CPC title

• G09G2320/0276

  for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction · CPC title

• G09G2340/06

  Colour space transformation · CPC title