Luminous member, method of driving luminous member, non-volatile memory device, sensor, method of driving sensor, and display apparatus

A method of driving a luminous member,

• wherein the luminous member comprising:
• a first electrode;
• a second electrode facing the first electrode;
• an emission layer disposed on a main surface of the first electrode, the emission layer emits light by AC power applied between the first electrode and the second electrode;
• and
• a ferrodielectric layer disposed between the emission layer and the second electrode,
• wherein the AC power applied to the luminous member is controlled based on polarity or magnitude of a residual polarization generated in the ferrodielectric layer, thereby adjusting emission characteristics of the emission layer,
• wherein the method comprising:
• generating a residual polarization in the ferrodielectric layer by applying DC power to the luminous member;
• and
• controlling the AC power applied to the luminous member based on polarity or magnitude of the residual polarization induced in the ferrodielectric layer, thereby adjusting emission characteristics of the emission layer.

A non-volatile memory device comprising:

• memory cells, each of which comprises a luminous member,
• wherein the luminous member comprising:
• a first electrode;
• a second electrode facing the first electrode;
• an emission layer disposed on a main surface of the first electrode, the emission layer emits light by AC power applied between the first electrode and the second electrode;
• and
• a ferrodielectric layer disposed between the emission layer and the second electrode,
• wherein the AC power applied to the luminous member is controlled based on polarity or magnitude of a residual polarization generated in the ferrodielectric layer, thereby adjusting emission characteristics of the emission layer;
• an information writing circuit, which generates a residual polarization in the ferrodielectric layer of a first memory cell selected from among the memory cells and writes information;
• a light detecting unit converting emission characteristics of the luminous members of the respective memory cells into electric signals;
• and
• an information reading circuit, which reads out information from an electric signal of the first memory cell, the electric signal converted from the emission characteristics based on light detection of the light detecting unit.

A sensor comprising:

• a luminous member,
• wherein the luminous member comprising:
• a first electrode;
• a second electrode facing the first electrode;
• an emission layer disposed on a main surface of the first electrode, the emission layer emits light by AC power applied between the first electrode and the second electrode;
• and
• a ferrodielectric layer disposed between the emission layer and the second electrode including a residual polarization induced by applied DC power between the first electrode and the second electrode of the luminous member,
• wherein an electric field formed by the AC power in the emission layer is controlled based on polarity or magnitude of a residual polarization induced in the ferrodielectric layer, thereby adjusting emission characteristics of the emission layer;
• a light detecting unit, which detects emission characteristics of light emitted by the luminous member;
• a control unit, which detects a change in the emission characteristics based on a detection result of the light detecting unit and controls output of an event signal based on the change of the emission characteristics;
• and
• an output unit, which outputs the event signal under the control of the control unit.

A method of driving a sensor,

• wherein the sensor comprising:
• a luminous member;
• wherein the luminous member comprising:
• a first electrode;
• a second electrode facing the first electrode;
• an emission layer disposed on a main surface of the first electrode, the emission layer emits light by AC power applied between the first electrode and the second electrode;
• and
• a ferrodielectric layer disposed between the emission layer and the second electrode,
• wherein the AC power applied to the luminous member is controlled based on polarity or magnitude of a residual polarization generated in the ferrodielectric layer, thereby adjusting emission characteristics of the emission layer;
• a light detecting unit, which detects emission characteristics of light emitted by the luminous member;
• a control unit, which detects a change in the emission characteristics based on a detection result of the light detecting unit and controls output of an event signal based on the change of the emission characteristics;
• and
• an output unit, which outputs the event signal under the control of the control unit,
• wherein the method comprising:
• in a reference state corresponding to at least one of a first state in which the residual polarization is formed in the ferrodielectric layer and a second state in which no residual polarization is formed, detecting the emission characteristics of the luminous member by applying AC power between the first electrode and the second electrode;
• determining whether there is a change in the emission characteristics;
• and,
• when a change in the emission characteristics is detected, outputting an event signal based on the change in the emission characteristics.

A display device comprising:

• pixels, each of which comprises a luminous member,
• wherein the luminous member comprising:
• a first electrode;
• a second electrode facing the first electrode;
• an emission layer disposed on a main surface of the first electrode, the emission layer emits light by AC power applied between the first electrode and the second electrode;
• and
• a ferrodielectric layer disposed between the emission layer and the second electrode,
• wherein the AC power applied to the luminous member is controlled based on polarity or magnitude of a residual polarization generated in the ferrodielectric layer, thereby adjusting emission characteristics of the emission layer;
• and
• a driving circuit, which controls display information based on a residual polarization of the ferrodielectric layer included in a pixel selected from among the pixels.