Sharp Kabushiki Kaisha Corporation

Katsuhiko Hashimoto

Hiroshi Tsujioka

Koichi Oda

Naoki Shiraishi

Isao Fujisawa

Nobutaka Takahashi

In a panel member of a coordinates input device, a first input unit and a second input unit are set on a pair of transparent electrodes and the first input unit only allows input by a member of a relatively large pressing pressure such as by using a pen. The second input unit also allows input by pressing with a member of a relatively small pressing pressure, such as a finger, and thus is not limited to a pen. In order to achieve a coordinates input device of enhanced accuracy in the reading of pressing position by accurately measuring the pressing level at the pressing position, the device possesses a structure in which an X-direction resistive film and a Y-direction resistive film are separated by a tiny clearance and, when the pressing position is pressed, various switches are controlled by a specified procedure such that the X-direction and Y-direction levels of the contact resistance due to the pressing of the position are detected and, only when the pressing levels are sufficient, are coordinates of the pressing position measured.

Coordinates input device

An object of the invention is to improve the operability and ease of use of electronic apparatus generally known as electronic notebooks used for storing and displaying textual data and other data entered thereto. The electronic apparatus facilitates effective creation of text having a hierarchical structure. The electronic apparatus enables data search to be performed between a plurality of different modes each controlling specific data without repeatedly entering a search character string. Also, with the electronic apparatus, when entering data identical to data already entered, the data can be entered by a simple key operation using the already entered data.

Electronic apparatus

A display integrated type position reading apparatus includes a display device driven for display in accordance with a driving signal in synchronization with a predetermined clock signal, and a conductive tablet mounted on a display screen of the display device. In operation, a CPU controls a tablet controller to apply voltage to the tablet. In response to a depression of an arbitrary position on the main surface of the tablet, the CPU reads out the depressed position as a digital signal via an A/D converter. The sampling by the A/D converter relating to reading is carried out at sampling points so as to avoid the mixing of noise, caused by a signal for driving the display unit, into the digital signal, resulting in an improvement in the read out accuracy of the depressed position.

Display integrated type position reading apparatus

A display circuit for driving two or more different displays includes a display memory for storing display data, an address signal generation circuit for generating address signals for the display memory, basic timing generation circuit for generating basic timing signals, an address control circuit for controlling a determination of the address of the display memory along the horizontal- and vertical-direction of the displays, and a switching circuit for switching the horizontal- and vertical-direction timing signals depending upon which one of the two or more display is selected, whereby the two or more displays are independently operated.

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Nara, Japan

Katsuhiko Hashimoto