Display unit, method of driving the same, and electronics device
View Patent ↗A display unit with which the internal structure is able to be simplified, a method of driving the same, and an electronics device are provided. The display unit includes a video signal processing circuit, a signal line drive circuit, a power source line drive circuit and a scanning line drive circuit. The power source line drive circuit concurrently applies a control pulse to the all power source lines, and concurrently controls light emission and light extinction of the all light emitting devices. The scanning line drive circuit applies a first selection pulse to the all scanning lines during time period when the fixed voltage is applied, and subsequently and sequentially applies a second selection pulse to the plurality of scanning lines during time period when the erasing pulse is applied.
1. A display unit comprising:
a pixel circuit array section that includes a plurality of scanning lines and a plurality of power source lines arranged in rows, a plurality of signal lines arranged in columns, and a plurality of light emitting devices and a plurality of pixel circuits arranged in a matrix corresponding to an intersection of each scanning line and each signal line;
a video signal processing circuit that sets a timing of outputting of an erasing pulse and determines a duty ratio between a light emitting period and a light extinction period, the erasing pulse being output to a signal line based on a video signal;
a signal line drive circuit that applies a fixed voltage to each signal line and applies the fixed voltage to all of the pixel circuits, and subsequently outputs the erasing pulse at the timing set by the video signal processing circuit to a specific signal line;
a power source line drive circuit that concurrently applies a control pulse to all of the power source lines, and concurrently controls light emission and light extinction of all of the light emitting devices; and
a scanning line drive circuit that applies a first selection pulse to all of the scanning lines during a time period when the fixed voltage is applied, and subsequently applies a second selection pulse to the plurality of scanning lines during a time period when the erasing pulse is applied,
wherein,
a voltage value of the erasing pulse is less than a voltage value of the fixed voltage, and
a voltage value of the second selection pulse is different than a voltage value of the first selection pulse.
2. The display unit according to claim 1 , wherein a magnitude of the voltage value of the second selection pulse is less than that of the first selection pulse.
3. A method of driving a display unit comprising:
a step of preparing a display unit that includes a pixel circuit array section including a plurality of scanning lines and a plurality of power source lines arranged in rows, a plurality of signal lines arranged in columns, and a plurality of light emitting devices and a plurality of pixel circuits arranged in a matrix corresponding to an intersection of each scanning line and each signal line and a drive circuit that drives the pixel circuit array section;
a step of setting a timing of outputting of an erasing pulse and determining a duty ratio between a light emitting period and a light extinction period, the erasing pulse being output to a signal line based on a video signal;
a step of applying a fixed voltage to each signal line and applying the fixed voltage to all of the pixel circuits, and subsequently outputting the erasing pulse at the timing set by a video signal processing circuit to a specific signal line;
a step of concurrently applying a control pulse to all of the power source lines, and concurrently controlling light emission and light extinction of all of the light emitting devices; and
a step of applying a first selection pulse to all of the scanning lines during a time period when the fixed voltage is applied, and subsequently applying a second selection pulse to the plurality of scanning lines during a time period when the erasing pulse is applied,
wherein,
a voltage value of the erasing pulse is less than a voltage value of the fixed voltage, and
a voltage value of the second selection pulse is different than a voltage value of the first selection pulse.
4. An electronics device comprising:
a display unit, wherein the display unit has
a video signal processing circuit that sets a timing of outputting of an erasing pulse and determines a duty ratio between a light emitting period and a light extinction period, the erasing pulse being output to a signal line based on a video signal,
a signal line drive circuit that applies a fixed voltage to each signal line and applies the fixed voltage to all of the pixel circuits, and subsequently outputs the erasing pulse at the timing set by the video signal processing circuit to a specific signal line,
a power source line drive circuit that concurrently applies a control pulse to all of the power source lines, and concurrently controls light emission and light extinction of all of the light emitting devices, and
a scanning line drive circuit that applies a first selection pulse to all of the scanning lines during a time period when the fixed voltage is applied, and subsequently and sequentially applies a second selection pulse to the plurality of scanning lines during a time period when the erasing pulse is applied,
wherein,
a voltage value of the erasing pulse is less than a voltage value of the fixed voltage, and
a voltage value of the second selection pulse is different than a voltage value of the first selection pulse.