4 results about "Critical voltage" patented technology

The invention provides a driving device for a light-emitting component. The driving device comprises a driving circuit, a storage unit, a resetting circuit, a first switch and a compensating circuit, wherein the driving circuit determines a current on a driving end according to a voltage on a control end thereof; the storage unit is arranged for keeping the voltage on the control end of the driving circuit; the resetting circuit is arranged for providing a resetting voltage to the control end of the driving circuit during the resetting process; a first end of the first switch is arranged for receiving a data voltage; a control end of the first switch is arranged for receiving a scanning voltage; and the compensating circuit is connected between a second end of the first circuit and the control end of the driving circuit so as to transmit the data voltage provided by the first switch to the control end of the driving circuit. The driving current generated by the driving device for a light-emitting component is not affected by a critical voltage of a transistor so each pixel of the light-emitting component on a display panel can acquire a same luminance according to the data voltage.

The invention provides an over-voltage protection (OVP) protection line of multiple groups of voltage. The OVP protection line of the multiple groups of voltage comprises a multivoltage sampling circuit, a voltage detecting circuit and a delayed self-locking protection circuit, wherein the multivoltage sampling circuit, the voltage detecting circuit and the delayed self-locking protection circuit are connected in series in sequence. The multivoltage sampling circuit is used for inputting the highest voltage of multiple groups of voltage into the voltage detecting circuit. The voltage detecting circuit judges whether the received voltage exceeds critical voltage. When the actual voltage exceeds the critical voltage, the delayed self-locking protection circuit is triggered. When the delayed self-locking protection circuit is triggered, a whole system is powered off, and the whole line is in a protection state. Compared with the prior art, the OVP protection line of the multiple groups of voltage can detect multiple groups of voltage, and meanwhile has delayed and self-locking functions, and can effectively save cost.

The invention relates to a nonvolatile memory and an operation method thereof. The operation method of the nonvolatile memory is applicable to a multilevel memory cell with a first storage position and a second storage position and comprises the following steps of: setting a main voltage distribution group and a plurality of sub voltage distribution groups, wherein the main voltage distribution group and the sub voltage distribution groups respectively comprise N critical voltage distribution curves, and N is an integer greater than 2; selecting a first operation level and a second operation level according to programming instructions; programming the first storage position according to the critical voltage distribution curves corresponding to the first operation level in the main voltage distribution group; and selecting one voltage from the sub voltage distribution groups according to the first operation level and programming the second storage position according to the critical voltage distribution curves corresponding to the second operation level in the selected sub voltage distribution groups.