US 5,812,284 AGranted

Electronic circuit apparatus

AssigneeCanon Kabushiki Kaisha

InventorsHidemasa Mizutani, Mineto Yagyu, Noriyuki Kaifu, Toshihiro Saika

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Abstract

An electronic circuit apparatus comprises an array of M.times.N functional elements, M.times.N switching elements provided in a one-to-one correspondence with the M.times.N functional elements, a shift register having M output lines, and a selector having N select lines. M control lines are commonly connected in units of N elements of the M.times.N switching elements. The M control lines are connected to the M output lines of said shift register. N input and/or output lines are commonly connected in units of M elements of the M.times.N switching elements. The N input and/or output lines are connected to the N select lines of the selector. Transistors constituting the shift register are thin-film transistors. And, transistors constituting the selector are transistors each having an active region consisting of a single-crystal semiconductor.

Claims14

Dependent claims

An electronic circuit apparatus comprising:

an array of m.times.n photoelectric conversion elements comprising n blocks arranged in a first predetermined direction, each of which comprises m photoelectric conversion elements adjacent to each other in a second predetermined direction;
a power source connected commonly to all of inputs of said array of m.times.n photoelectric conversion elements;
an array of m.times.n switching elements, corresponding one-to-one to the each of said functional elements, comprising n blocks each comprising m thin film transistors adjacent to each other, wherein an input of each of said switching elements is connected to a respective output of a corresponding one of said photoelectric conversion elements, and wherein, in each block of said switching elements, gates of said m switching elements are connected commonly, so as to constitute n common control lines;
m common output lines, wherein respective common output lines are connected commonly to an output of one switching element selected from each of n blocks of said switching elements;
a shift register having n outputs, the n outputs of said shift resistor respectively being connected commonly to n common control lines;
a selector connected to the m common output lines, for selecting one from among the common output lines and connecting the selected one to an output terminal,
wherein said shift resistor outputs a pulse to the selected common control line, to turn on simultaneously the switching elements in the selected block, so that the photoelectric conversion signal is output through said switching elements to said m common output lines, and said selector operates to output successively the photoelectric conversion signal from the output terminal,
wherein the shift register output operation is repeated n times, thereby outputting the photoelectric conversion signal successively from said m.times.n photoelectric conversion elements through the output terminal,
wherein said shift register comprises a thin film transistor, and
wherein the selector comprises a transistor having an active region of a monocrystalline semiconductor.

7 more elements

An electronic circuit apparatus comprising:

an array of n.times.m functional elements comprising n blocks arranged in a first predetermined direction, and each comprising m functional elements arranged adjacent to each other in a second predetermined direction;
a power source connected commonly to all of said array of m.times.n functional elements;
an array of m.times.n switching elements, corresponding one-to-one to the each of said functional elements, comprising n blocks each comprising m switching elements comprising thin film transistors adjacent to each other, an output of each of said switching elements being connected to a respective output of a corresponding one of said functional elements, and wherein, in each block of said switching elements, gates of said m switching elements of the each block are connected commonly, to constitute n common control lines;
m common lines, wherein respective common lines are connected commonly to the input of one switching element selected from each block of said switching elements;
a shift register having n outputs, the n outputs of said shift register respectively being connected commonly to n common control lines;
a selector connected to m common lines for selecting one from among the common lines to connect the selected common line to a terminal,
wherein said selector inputs a signal successively from the terminal into said m common lines to cause a pulse to be output from said shift register to the selected common control line, so that said switching elements in the selected block are simultaneously turned on, thereby causing the signal to be input through said switching elements from the m common lines to said functional elements,
wherein the input operation of said selector is repeated n times, to input, from the terminal, the signal successively into said m.times.n functional elements,
wherein said shift register comprises a thin film transistor, and
wherein said selector comprises a transistor having an active region of a monocrystalline semiconductor.

7 more elements

Dependencies are inferred from the claim text.