Display panel driving method and display panel
View Patent ↗A method for driving a display panel includes controlling a signal of ON/OFF state of a switch in a Demux circuit as a switch signal, and dividing each rising time period in the switch signal into two phases (T, T 1 ), so that the abrupt change effect of voltage generated on both side positions of the display panel and a middle position of the display panel is relatively uniform, ensuring that the charging effect of the display panel at different positions is substantially the same, the brightness of the display panel is even after being driven, and the problem of bright lines in the column direction of the display panel is effectively improved.
1. A method for driving a display panel having a Demux circuit, comprising:
setting a switch signal for controlling an on/off state of a switch in the Demux circuit; and
dividing each rise time period of the switch signal into two phases, wherein the switch in the Demux circuit keeps an on state in the rise time period of the switch signal,
wherein the two phases comprise a first phase and a second phase,
wherein the Demux circuit module comprises a number of Demux circuits, each Demux circuit comprising a switch, a parasitic capacitor, and a coupling capacitor, and wherein a first polar plate of the parasitic capacitor is connected to the switch, and a second polar plate of the parasitic capacitor is connected to a first polar plate of the coupling capacitor, and
wherein at an end of the first phase of each rise time period, the switch signal transforms from a low electrical level to a predetermined electrical level between the low electrical level and a high electrical level to generate a feedthrough voltage,
Δ
V
a
=
(
V
x
-
VGL
)
*
C
1
C
1
+
C
2
,
V x representing the predetermined electrical level, VGL representing the low electrical level, C 1 representing a parasitic capacitor, C 2 representing a coupling capacitor.
2. The method for driving a display panel according to claim 1 , wherein and the switch keeps the on state when the switch signal is at the predetermined electrical level.
3. The method for driving a display panel according to claim 2 , wherein the switch signal transforms from the predetermined electrical level to the high electrical level in the second phase.
4. The method for driving a display panel according to claim 1 , wherein the switch keeps the on state when the switch signal is at the low electrical level.
5. The method for driving a display panel according to claim 1 , wherein the switch keeps the off state when the switch signal is at the high electrical level.
6. The method for driving a display panel according to claim 1 , wherein the switch is a thin film transistor.
7. A display panel, comprising a driving circuit, a Demux circuit module connected to the driving circuit, and a pixel circuit module connected to the Demux circuit module,
wherein the driving circuit outputs a switch signal for controlling an on/off state of a switch in the Demux circuit module to the Demux circuit module, wherein each rise time period is divided into two phases comprising a first phase and a second phase, and at an end of the first phase of each rise time period, the switch signal transforms from a low electrical level to a predetermined electrical level between the low electrical level and a high electrical level to generate a feedthrough voltage,
Δ
V
a
=
(
V
x
-
VGL
)
*
C
1
C
1
+
C
2
,
Vx representing the predetermined electrical level, VGL representing the low electrical level, C 1 representing a parasitic capacitor, C 2 representing a coupling capacitor,
wherein the switch in the Demux circuit is kept in an on state in the rise time period of the switch signal,
wherein the Demux circuit module comprises a number of Demux circuits, each Demux circuit comprising a switch, a parasitic capacitor, and a coupling capacitor, and
wherein a first polar plate of the parasitic capacitor is connected to the switch, and a second polar plate of the parasitic capacitor is connected to a first polar plate of the coupling capacitor.
8. The display panel according to claim 7 , wherein the pixel circuit module comprises a number of pixel circuits, the number of the pixel circuits being same to the number of the Demux circuits, and each pixel circuit is connected to a corresponding Demux circuit at a second polar plate of a coupling capacitor of the corresponding Demux circuit.
9. The method for driving a display panel according to claim 1 , wherein ΔV a releases a plurality of charges through a switch transistor, resulting in a voltage written into a plurality of pixel circuits on two sides of the display panel being Vdata+ΔV 1 ′, ΔV 1 ′ being smaller than ΔV a .