Display panel, driver circuit, driving method, and electronic apparatus

1. A display panel comprising:

display elements;

a plurality of drive electrodes;

one or more touch detecting electrodes that form a capacitor along with the corresponding drive electrode;

a main driver unit that generates a basic drive signal including a pulse part supplied to the drive electrodes;

a first auxiliary driver unit that includes a capacitive element and that exchanges electric charges between the capacitive element and the drive electrodes in synchronization with the pulse part; and

a voltage supply unit,

wherein the first auxiliary driver unit further includes a first switch that controls the exchange of electric charges between the capacitive element and the drive electrode,

wherein the pulse part changes between two voltage levels,

wherein the first switch is turned on at a time corresponding to a rising or falling of the pulse part,

wherein the pulse part changes from a voltage of a first level to a voltage of a second level,

wherein the capacitive element is set, in a period in which the first switch is turned off, to a voltage of a third level that is previously determined depending on the voltage of the second level,

wherein the voltage supply unit is configured to generate and supply the voltage of the third level to the capacitive element, and

wherein the first auxiliary driver unit further includes a voltage supply switch configured to control the supply of the voltage of the third level, which is generated by the voltage supply unit, to the capacitive element.

2. The display panel according to claim 1 , wherein the voltage supply switch is turned on in a period in which the first switch is turned off.

3. The display panel according to claim 1 , wherein the voltage of the third level is at a same voltage level as the voltage of the second level.

4. The display panel according to claim 1 , wherein the voltage of the third level is higher than the voltage of the second level when the voltage of the second level is higher than the voltage of the first level, and is lower than the voltage of the second level when the voltage of the second level is lower than the voltage of the first level.

5. The display panel according to claim 1 , wherein the first switch is turned on at a same time as or just before the rising of the pulse part or at a same time as or just before the falling of the pulse part.

6. The display panel according to claim 1 , wherein each of the drive electrodes extends in a predetermined direction, and the drive electrodes are arranged in a direction perpendicular to the predetermined direction,

wherein the main driver unit is disposed in a vicinity of the drive electrode which is disposed at one end of each of the plurality of drive electrodes, and

wherein the first auxiliary drive unit is disposed in the vicinity of the drive electrode which is disposed at the other end thereof.

7. The display panel according to claim 1 , further comprising a scanning unit that supplies the pulse part of the basic drive signal to the plurality of drive electrodes at every predetermined number of drive electrodes in a drive electrode block,

wherein a capacitance value of the capacitive element is less than or equal to ten times a capacitance value of a parasitic capacitance between the predetermined number of drive electrodes in the drive electrode block.

8. The display panel according to claim 1 , further comprising a second auxiliary driver unit that includes a capacitive element and a second switch controlling exchange of electric charges between the capacitive element and the drive electrodes,

wherein the second switch is turned on at a first time other than a second time at which the first switch is turned on out of the rising time and the falling time of the pulse part.

9. The display panel according to claim 1 , wherein each display element includes

a liquid crystal layer, and

a pixel electrode that is formed between the liquid crystal layer and the corresponding drive electrode or is formed to face the liquid crystal layer with the corresponding drive electrode interposed therebetween.

10. The display panel according to claim 9 , wherein the capacitive element includes an electrode formed in the same layer as the drive electrodes and an electrode formed in the same layer as the pixel electrodes.

11. The display panel according to claim 9 , wherein each display element further includes a pixel transistor, and

wherein the capacitive element includes an electrode formed in a same layer as a gate electrode of the pixel transistor.

12. The display panel according to claim 1 , wherein each display element includes

a liquid crystal layer, and

a pixel electrode that is disposed to face the corresponding drive electrode with the liquid crystal layer interposed therebetween.