1. A compound of Formula IIId
wherein E is an optional linker group;
wherein R is a 5, 6, or 7-membered carbocyclic ring system;
wherein P is 4H-1,2,4-triazole and;
wherein Q is a polycyclic ring system and
at least Q comprises a sulphamate group.
2. A compound according to claim 1 wherein P, is 4H-1,2,4-triazole and Q and R are independently selected from or comprise carbocyclic ring systems selected from the group consisting of aryl groups, cycloalkyl groups, substituted and unsubstituted aromatic rings, and substituted and unsubstituted benzyl rings.
3. A compound according to claim 2 wherein P is 4H-1,2,4-triazole and Q and R are independently selected from or comprise carbocyclic ring systems consisting of substituted and unsubstituted benzyl rings.
4. A compound according to claim 1 wherein E is present.
5. A compound according to claim 1, wherein E is selected from C\u2550O and hydrocarbyl groups.
6. A compound according to claim 1, wherein E is selected from C\u2550O and linear or branched hydrocarbon groups having a carbon chain of from 1 to 6 carbon atoms and a group of the formula
wherein n is 1 to 6 and Y=Oxygen, Sulphur or CH2.
7. A compound according to claim 2, wherein Q and R are independently selected from or comprise an aromatic ring.
8. A compound according to claim 2, wherein Q and R are independently selected from or comprise substituted and unsubstituted aromatic rings.
9. A compound according to claim 1, wherein P, Q and R are independently selected from or comprise ring systems comprising from 3 to 10 members.
10. A compound according to claim 1, wherein Q is a polycyclic ring systems comprising carbon and optionally one or more hetero atoms.
11. A compound according to claim 1, wherein Q is a polycyclic ring systems comprising carbon and optionally one, two or three hetero atoms.
12. A compound according to claim 1, wherein Q is a polycyclic ring systems comprising carbon and one or more hetero atoms.
13. A compound according to claim 1, wherein Q is a polycyclic ring systems comprising carbon and one or more hetero atoms selected from Nitrogen, Sulphur and Oxygen.
14. A compound according to claim 1 wherein R is substituted by a halogen.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An organic light emitting display device, comprising:
a display panel including a plurality of pixels, wherein each pixel includes a driving transistor outputting a data current from a data voltage to emit light from an organic light emitting diode; and
a panel driver for driving the display panel in a sensing mode and a display mode,
wherein, in the sensing mode, the panel driver calculates a threshold voltage prediction value of the driving transistor for each pixel by sensing a mobility and a threshold voltage of the driving transistor for the pixel through a reference line connected to a sensing node between the driving transistor and the organic light emitting diode of the pixel,
wherein, in the display mode, the panel driver drives each pixel based on the threshold voltage prediction value of the pixel, and
wherein the panel driver senses the mobility and the threshold voltage of the driving transistor at a shortened sensing time before a voltage saturation time at which a sensing voltage in accordance with a current flowing in the driving transistor is saturated, and calculates the threshold voltage prediction value for each pixel corresponding to the voltage saturation time on the basis of a threshold voltage sensing value of the driving transistor for each pixel, a mobility sensing value of the driving transistor for each pixel, and a capacitance of the reference line.
2. The organic light emitting display device according to claim 1, wherein the panel driver calculates the threshold voltage prediction value of the driving transistor for each pixel using the mobility sensing value and the threshold voltage sensing value of the driving transistor for each pixel, a differential voltage between gate and source voltages of the driving transistor at the shortened sensing time, the capacitance of the reference line, a sensing data voltage applied to a gate electrode of the driving transistor in the sensing mode, a pre-charging voltage applied to the reference line before the shortened sensing time, and the shortened sensing time.
3. The organic light emitting display device according to claim 1, wherein the panel driver calculates the threshold voltage prediction value (Vth\u2032) of the driving transistor for each pixel using a first Math Formula,
Vth
\u2032
=
Vgs
\ue8a0
(
t
)
–
1
1
Vdata_sen
–
Vpre
–
Vth_sen
+
\u03b1
Cref
\ue89e
t
,
wherein \u2018Vgs(t)\u2019 is a differential voltage between gate and source voltages of the driving transistor at the shortened sensing time, \u2018Vdata_sen\u2019 is a sensing data voltage applied to a gate electrode of the driving transistor, \u2018Vpre\u2019 is a pre-charging voltage applied to the reference line before the shortened sensing time, \u2018Vth_sen\u2019 is the threshold voltage sensing value of the driving transistor, \u2018\u03b1\u2019 is the mobility sensing value of the driving transistor, \u2018Cref\u2019 is the capacitance of the reference line, and \u2018t\u2019 is the shortened sensing time.
4. The organic light emitting display device according to claim 3, wherein the panel driver calculates a final threshold voltage prediction value by repeating the operation of the first Math Formula two or more times using the threshold voltage prediction value (Vth\u2032) for each pixel, which is calculated by the first Math Formula, as the threshold voltage sensing value (Vth_sen) for each pixel.
5. The organic light emitting display device according to claim 1, wherein the panel driver calculates the threshold voltage prediction value of the driving transistor for each pixel using a mobility offset value preset based on the mobility sensing value of the driving transistor for each pixel.
6. The organic light emitting display device according to claim 5, wherein the panel driver calculates the threshold voltage prediction value (Vth\u2032) of the driving transistor for each pixel using a second Math Formula,
Vth
\u2032
=
Vgs
\ue8a0
(
t
)
–
1
1
Vdata_sen
–
Vpre
–
Vth_sen
+
\u03b1
Cref
\ue89e
t
+
n
,
wherein \u2018Vgs(t)\u2019 is a differential voltage between the gate and source voltages of the driving transistor at the shortened sensing time, \u2018Vdata_sen\u2019 is the sensing data voltage applied to the gate electrode of the driving transistor, \u2018Vpre\u2019 is the pre-charging voltage applied to the reference line before the shortened sensing time, \u2018Vth_sen\u2019 is the threshold voltage sensing value of the driving transistor, \u2018\u03b1\u2019 is the mobility sensing value of the driving transistor, \u2018Cref\u2019 is the capacitance variable of the reference line, \u2018t\u2019 is the shortened sensing time, and \u2018n\u2019 is the mobility offset value in accordance with the mobility sensing value of the driving transistor.
7. The organic light emitting display device according to claim 6, wherein the panel driver calculates a final threshold voltage prediction value for each pixel by repeating the operation of the second Math Formula two or more times by using the threshold voltage prediction value (Vth\u2032) for each pixel, which is calculated by the second Math Formula, as the threshold voltage sensing value (Vth_sen) for each pixel.
8. The organic light emitting display device according to claim 6, wherein the mobility offset value is an operation value of a linear function using the mobility sensing value of the driving transistor.
9. The organic light emitting display device according to claim 8, wherein the panel driver calculates a final threshold voltage prediction value for each pixel by repeating the operation of the second Math Formula two or more times by using the threshold voltage prediction value (Vth\u2032) for each pixel, which is calculated by the second Math Formula, as the threshold voltage sensing value (Vth_sen) for each pixel.
10. A method of driving an organic light emitting display device, the display device including a display panel and a panel driver, and the display panel includes a plurality of pixels, each pixel including a driving transistor and an organic light emitting diode, the method comprising:
in a sensing mode, calculating a threshold voltage prediction value of a driving transistor for each pixel by sensing a mobility and a threshold voltage of the driving transistor for the pixel through a reference line connected to a sensing node between the driving transistor and an organic light emitting diode of the pixel, and,
in a display mode, the panel driver drives each pixel based on the threshold voltage prediction value of the pixel,
wherein the panel driver senses the mobility and the threshold voltage of the driving transistor at a shortened sensing time before a voltage saturation time at which a sensing voltage in accordance with a current flowing in the driving transistor is saturated, and calculates the threshold voltage prediction value for each pixel corresponding to the voltage saturation time on the basis of a threshold voltage sensing value of the driving transistor for each pixel, a mobility sensing value of the driving transistor for each pixel, and a capacitance of the reference line.
11. The method according to claim 10, wherein the panel driver calculates the threshold voltage prediction value of the driving transistor for each pixel using the mobility sensing value and the threshold voltage sensing value of the driving transistor for each pixel, a differential voltage between gate and source voltages of the driving transistor at the shortened sensing time, the capacitance of the reference line, a sensing data voltage applied to a gate electrode of the driving transistor in the sensing mode, a pre-charging voltage applied to the reference line before the shortened sensing time, and the shortened sensing time.
12. The method according to claim 10, wherein the panel driver calculates the threshold voltage prediction value (Vth\u2032) of the driving transistor for each pixel using a first Math Formula,
Vth
\u2032
=
Vgs
\ue8a0
(
t
)
–
1
1
Vdata_sen
–
Vpre
–
Vth_sen
+
\u03b1
Cref
\ue89e
t
,
wherein \u2018Vgs(t)\u2019 is a differential voltage between gate and source voltages of the driving transistor at the shortened sensing time, \u2018Vdata_sen\u2019 is a sensing data voltage applied to a gate electrode of the driving transistor, \u2018Vpre\u2019 is a pre-charging voltage applied to the reference line before the shortened sensing time, \u2018Vth_sen\u2019 is the threshold voltage sensing value of the driving transistor, \u2018\u03b1\u2019 is the mobility sensing value of the driving transistor, \u2018Cref\u2019 is the capacitance of the reference line, and \u2018t\u2019 is the shortened sensing time.
13. The method according to claim 12, wherein the panel driver calculates a finally-obtained threshold voltage prediction value by repeating the operation of the first Math Formula two or more times using the threshold voltage prediction value (Vth\u2032) for each pixel, which is calculated by the first Math Formula, as the threshold voltage sensing value (Vth_sen) for each pixel.
14. The method according to claim 10, wherein the panel driver calculates the threshold voltage prediction value of the driving transistor for each pixel using a mobility offset value preset based on the mobility sensing value of the driving transistor for each pixel.
15. The method according to claim 14, wherein the panel driver calculates the threshold voltage prediction value (Vth\u2032) of the driving transistor for each pixel by the following second Math Formula,
Vth
\u2032
=
Vgs
\ue8a0
(
t
)
–
1
1
Vdata_sen
–
Vpre
–
Vth_sen
+
\u03b1
Cref
\ue89e
t
+
n
,
wherein \u2018Vgs(t)\u2019 is a differential voltage between the gate and source voltages of the driving transistor at the shortened sensing time, \u2018Vdata_sen\u2019 is the sensing data voltage applied to the gate electrode of the driving transistor, \u2018Vpre\u2019 is the pre-charging voltage applied to the reference line before the shortened sensing time, \u2018Vth_sen\u2019 is the threshold voltage sensing value of the driving transistor, \u2018\u03b1\u2019 is the mobility sensing value of the driving transistor, \u2018Cref\u2019 is the capacitance variable of the reference line, \u2018t\u2019 is the shortened sensing time, and \u2018n\u2019 is the mobility offset value in accordance with the mobility sensing value of the driving transistor.
16. The method according to claim 15, wherein the panel driver calculates the finally-obtained threshold voltage prediction value for each pixel by repeating the operation of the second Math Formula two or more times by using the threshold voltage prediction value (Vth\u2032) for each pixel, which is calculated by the second Math Formula, as the threshold voltage sensing value (Vth_sen) for each pixel.
17. The method according to claim 15, wherein the mobility offset value is an operation value of a linear function using the mobility sensing value of the driving transistor.
18. The method according to claim 17, wherein the panel driver calculates the finally-obtained threshold voltage prediction value for each pixel by repeating the operation of the second Math Formula two or more times by using the threshold voltage prediction value (Vth\u2032) for each pixel, which is calculated by the second Math Formula, as the threshold voltage sensing value (Vth_sen) for each pixel.
19. A panel driver for driving a display panel in a sensing mode and a display mode, comprising:
a timing controller for driving a row driver and a column driver of the display panel;
the row driver for generating and supplying scan pulses to scan lines of the display panel based on a row driver control signal from the timing controller;
the column driver for supplying data voltage to data lines of the display panel based on a column driver data control signal from the timing controller in the display mode, and sensing a mobility and threshold voltage of a driving transistor for each of a plurality of pixels of the display panel based on a column driver sense control signal from the timing controller and supplying a mobility sensing value and a threshold voltage sensing value for each pixel to the timing controller in the sensing mode; and
a memory in communication with the timing controller for storing the mobility sensing value and the threshold voltage sensing value,
wherein, in the sensing mode, the timing controller calculates a threshold voltage prediction value of the driving transistor for each pixel using the mobility and the threshold voltage of the driving transistor for the pixel, and
wherein, in the display mode, the panel driver drives each pixel based on the threshold voltage prediction value of the pixel,
wherein the mobility and the threshold voltage of the driving transistor of each pixel are sensed at a shortened sensing time before a voltage saturation time at which a sensing voltage in accordance with a current flowing in the driving transistor is saturated, and
wherein the timing controller calculates the threshold voltage prediction value for each pixel corresponding to the voltage saturation time on the basis of the threshold voltage sensing value of the driving transistor of the pixel, the mobility sensing value of the driving transistor of the pixel, and a capacitance of a reference line connected to a sensing node of the pixel.
20. The panel driver according to claim 19, wherein in the sensing mode the display panel is driven during a first time period to initialize each pixel with a pre-charging voltage, a second time period to drive the driving transistor of each pixel to saturation and, a third time period to sense a voltage of the reference line of each pixel, and
wherein in the display mode each pixel is driven during an addressing period providing a differential voltage between a data voltage and a reference voltage to pre-charge the pixel, and during a light emission period providing data current based on the differential voltage to an organic light emitting diode.