Display apparatus
View Patent ↗Disclosed herein is a display apparatus includes, a pixel array and a driver configured to drive the pixel array. The pixel array includes rows of scanning lines, columns of signal lines, a matrix of pixels disposed at crossings of the scanning lines and the signal lines, and feeding lines associated with respective rows of the pixels, the pixels including respective sampling transistors having respective gates connected to the scanning lines; and the driver includes a main scanner configured to supply control signals to the scanning lines, the main scanner including a shift register, output buffers connected respectively between the shift register and the scanning lines, and a pulse power supply configured to supply power supply pulses, each having a predetermined pulse duration, to the output buffers, and wherein the main scanner outputs power supply pulses supplied from the pulse power supply as the control signals to the respective scanning lines in response to a shift pulse output from the shift register.
1. A display apparatus comprising:
a pixel array; and
a driver configured to drive said pixel array;
wherein said pixel array including rows of scanning lines, columns of signal lines, and a matrix of pixels disposed at crossings of said scanning lines and the signal lines,
said driver including a main scanner configured to supply control signals to said scanning lines,
said main scanner including a shift register, output buffers connected respectively between said shift register and said scanning lines, and a pulse power supply
wherein each of said output buffers comprises an inverter including a pair of complementary switching devices connected in series between a power supply line and a ground line, and said pulse power supply supplies a train of power supply pulses to the power supply line of said inverter.
2. The display apparatus according to claim 1 ,
wherein each of said pixels comprises a light-emitting element, a driving transistor, and a retentive capacitor;
said sampling transistor having a source and a drain, one of which is connected to one of said signal lines and the other to the gate of the driving transistor;
said driving transistor having a source and a drain, one of which is connected to said light-emitting element and the other to one of said feeding lines; and
said retentive capacitor being connected between the source and the gate of the driving transistor;
wherein when a signal potential is held in said retentive capacitor, said main scanner renders said sampling transistor conductive to electrically disconnect the gate of said driving transistor from the signal line.
3. The display apparatus according to claim 1 , wherein said pixels comprise respective driving transistor and respective retentive capacitors, said driver includes a power supply scanner configured to switch said feeding lines from a first potential to a second potential at a first timing before said sampling transistors sample signal potentials;
said main scanner renders said sampling transistors conductive to apply a reference potential from said signal lines to the gates of said driving transistors at a second timing before said sampling transistors sample signal potentials; and
said power supply scanner switches said feeding lines from the second potential to the first potential to hold a voltage corresponding to a threshold voltage of said driving transistors in said retentive capacitors at a third timing after said second timing.
4. The display apparatus according to claim 1 , wherein at least one of said switching devices which is closer to said power supply line comprises a transmission gate device.
5. A display apparatus comprising:
a pixel array; and
a driver configured to drive said pixel array;
wherein said pixel array including rows of scanning lines, columns of signal lines, and a matrix of pixels disposed at crossings of said scanning lines and the signal lines, and feeding lines associated with respective rows of the pixels, said pixels including respective sampling transistors having respective gates connected to said scanning lines,
said driver including a main scanner configured to supply control signals to said scanning lines,
said main scanner including a shift register, output buffers connected respectively between said shift register and said scanning lines, and a pulse power supply configured to supply power supply pulses, each having a predetermined pulse duration, to said output buffers, wherein said main scanner outputs power supply pulses supplied from said pulse power supply as the control signals to the respective scanning lines in response to a shift pulse output from said shift register, and
wherein each of said output buffers comprises an inverter including a pair of complementary switching devices connected in series between a power supply line and a ground line, and said pulse power supply supplies a train of power supply pulses to the power supply line of said inverter.
6. The display apparatus according to claim 5 , wherein at least one of said switching devices which is closer to said power supply line comprises a transmission gate device.