Display device, and electronic device and ornamental product incorporating same
View Patent ↗Disclosed is a display device for use of a surface display of an arbitrary shape, including a plural number of display element units, each made up of a circuit that forms a single stage of a scanning circuit and a pixel circuit connected to an output of the scanning circuit, are arranged in a unicursal fashion on a display substrate.
1. A TFT surface display device, comprising:
a plurality of display element units that are arranged on a display substrate and that include a plurality of unit circuits, and a plurality of pixel circuits, each unit circuit provided in association with each display element unit,
each pixel circuit including:
a display element; and
a pixel switch that on/off controls a connection between a data signal supplied thereto and said display element,
each unit circuit having i) a single input node to receive a scanning signal, and ii) a single output node to output said scanning signal,
each one pixel circuit connected directly to said output node of each unit circuit in one-to-one correspondence,
a plurality of stages of said unit circuits being cascade connected to transfer said scanning signal from a preceding stage to a succeeding stage, each unit circuit of even and odd stage unit circuits including:
an inverter circuit that is connected directly to said input node; and
a CMOS transmission gate that includes a first transistor of a first conductivity type and a second transistor of a second conductivity type, said first and second transistors being connected in parallel directly between an output node of said inverter circuit and said single output node of said each unit circuit,
wherein a clock signal is supplied to a gate electrode of said second transistor of said CMOS transmission gate in said odd stage unit circuit, and a signal obtained by inverting said clock signal is supplied to a gate electrode of said first transistor of said CMOS transmission gate in said odd stage unit circuit,
wherein said signal obtained by inverting said clock signal is supplied to a gate electrode of said second transistor of said CMOS transmission gate in said even stage unit circuit, and said clock signal is supplied to a gate electrode of said first transistor of said CMOS transmission gate in said even stage unit circuit,
wherein each said pixel switch includes a transistor having a gate electrode connected directly to an associated single output node of said unit circuit, having a drain electrode connected directly to said data signal, and having a source electrode connected directly to said display element,
wherein said transistors respectively constituting said pixel switches connected directly to said single output nodes of said odd stage unit circuits are each of a first conductivity type, and said transistors respectively constituting said pixel switches connected directly to said output nodes of even stage unit circuits are each of a second conductivity type,
wherein said TFT surface display device has a non-rectangular outer shape providing a non-rectangular display region, said display element units arranged in a non-rectangular area corresponding to said non-rectangular outer shape.
2. The TFT surface display device according to claim 1 , wherein said unit circuits and said pixel circuits comprise polysilicon TFTs formed on a glass substrate to constitute an active matrix liquid crystal display device.
3. The TFT surface display device according to claim 1 , wherein said unit circuit is arranged on said display substrate with one or more folded parts for forming a non-rectangular display area.
4. The TFT surface display device according to claim 1 , wherein said unit circuit is arranged spirally on said display substrate to form a non-rectangular display area.
5. The TFT surface display device according to claim 1 , wherein a part of said unit circuit is arranged between neighboring ones of said pixel circuits or underneath said pixel circuit.
6. The TFT surface display device according claim 1 , wherein a circuit including said pixel circuits and said unit circuit is arranged on said display substrate so as to have at least one bend.
7. The TFT surface display device according to claim 1 , wherein a spirally extending array of said pixel circuits and said unit circuit is arranged on said display substrate.
8. The TFT surface display device according to claim 1 , wherein a flexible linear display unit including said pixel circuits and said unit circuit that are linearly arranged is wrapped at least two turns on a support.
9. An electronic device including the TFT surface display device as set forth in claim 1 .
10. An ornamental product including the TFT surface display device as set forth in claim 1 .