Sharp Kabushiki Kaisha Corporation

Semiconductor Energy Laboratory Co., Ltd.

Other

Tomoyuki Nagai

Shigeki Imai

Shunpei Yamazaki

Jun Koyama

Yoshihiro Izumi

Hiromi Katoh

Mayuko Sakamoto

Noriyuki Ohashi

Shohichi Andoh

Yuta Senokuchi

Kazuo Kitaura

Hatsukazu Tanaka

Futoshi Hayama

A liquid crystal display panel () includes a TFT substrate (), a CF substrate () facing the TFT substrate (), a frame region around a display region (D), and a sealing material () in the frame region. The frame region includes a wide frame region (F) adjacent to a terminal region (T), and a narrow frame region (F) having a smaller width than the wide frame region (F). A dummy structure () overlapping the sealing material () as viewed from above is in the CF substrate () in the wide frame region (F).

Display panel

An electronic device is provided which can appropriately adjust the brightness of a display apparatus in accordance with the lightness of visible light by preventing UV-light from being incident upon an optical sensor. An electronic device having, in a housing, a display apparatus () that includes an active matrix substrate () having a pixel array region () in which a plurality of pixels () are arranged and a display medium () provided in a gap between the active matrix substrate () and a counter substrate (), includes an optical sensor () provided in a peripheral region () present in a periphery of the pixel array region () in the active matrix substrate () of a display apparatus (), and a UV-light blocking member () that is provided in a portion covering the optical sensor () in the housing and transmits visible light and absorbs UV-light.

Electronic device

An object of the present invention is to provide an electronic circuit device capable of reducing the occurrence of electromagnetic waves associated with the propagation of a signal by utilizing light as a signal. The electronic circuit device has a transparent substrate (hereinafter written as a substrate) over which an optical sensor and an optical shutter and an electronic circuit composed of thin film transistors (TFTs) are formed. An optical signal is inputted from an external into the electronic circuit device, the optical signal is directly irradiated on the optical sensor over the substrate, and penetrates through the substrate, and inputted into an optical sensor over another substrate. The optical sensor converts the optical signal into an electronic signal, and the circuit over the substrate operates. A control signal controls the optical shutter, a light is inputted from the external into this optical shutter, and whether it is transmitted or it is interrupted is determined, whereby the signal is taken out.

Electronic circuit device

An object of the present invention is to provide an electronic circuit device capable of reducing the occurrence of electromagnetic waves accompanying the propagation of a signal. The electronic circuit device comprises a plurality of transparent substrates, on which an optical sensor and an optical shutter are formed. An optical signal is inputted from the external into the electronic circuit device, and the optical signal is directly irradiated on the optical sensor disposed on the transparent substrate, or the optical signal is transmitted through the transparent substrate and inputted into an optical sensor on the other substrate. The optical sensor converts the optical signal into an electric signal, and the circuit disposed on the substrate is operated. The optical shutter is controlled by the output of the circuit, the light is inputted from the external into this optical shutter, and whether the light has been transmitted or not is determined, thereby taking out the signal. In this way, by reducing electric signals for input and output, the occurrence of unnecessary electromagnetic waves is prevented.

Electronic circuit device with optical sensors and optical shutters at specific locations

A cryptosystem includes an encrypting device, a communication path, and a decrypting arithmetic device. Key generation means in the encrypting device generate a public key {g, g} as random numbers respectively including the power of (p&#x2212;1) and the power of (q&#x2212;1) and decrypt a message m using the Fermat's little theorem and the Chinese remainder theorem. This makes it possible to suggest an extremely simple cryptosystem, which is simplified by reducing the amount of computations for encryption and decryption and enables encryption and decryption by simple calculations, while maintaining a security equivalent to the RSA encryption scheme.

Encrypting device, decrypting device, cryptosystem including the same devices, encrypting method, and decrypting method

A remote control receiving device mounted on an apparatus has a switch circuit and an LED. The switch circuit is connected between a power supplied circuit of the apparatus and a power source. The LED functioning as a light receiving element receives an optical signal from a transmitting device. When the apparatus turns into a standby state based on an optical signal from a transmitting device, the switch circuit is brought into OFF by a microcomputer in the remote control receiving device. This intercept supply of power to the remote control light receiving circuit as well as the apparatus. When the LED receives an optical signal from the transmitting device, the LED outputs a electric control signal under an unbias state to turn on the switch circuit. Thereby, power is supplied to the apparatus.

Power control device, remote control receiving device and optical communication device with zero power consumption during standby

A tuner part of a digital satellite broadcasting receiver includes an IF signal demodulator part and an I/Q signal demodulator part. These demodulator parts are formed on different substrates, and covered with different chassis respectively. Low-pass filters are provided between an amplifier circuit of the IF signal demodulator part and an output terminal and between an IF signal input terminal of the I/Q signal demodulator part and a baseband converter circuit respectively. Further, an AGC detector circuit for detecting the level of an IF signal for the baseband converter circuit is provided for controlling the amplifier circuit of the IF signal demodulator part by its AGC voltage.

Growing community of inventors

Tenri, Japan

Tomoyuki Nagai