Computer graphics processing and selective visual display system – Display peripheral interface input device – Including keyboard
Reexamination Certificate
1998-10-28
2003-01-07
Hjerpe, Richard (Department: 2674)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Including keyboard
C345S158000, C345S211000, C341S020000, C341S022000
Reexamination Certificate
active
06504529
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an information processor, an input device thereof and a display device, and particularly to a communication technique for performing communications between an input device and the main body of an information processor containing CPU or a display device.
2. Description of the Related Art
One type of information processor, known as a “personal computer” is disclosed in Japanese Laid-open Patent Application No. Hei-6-195163, for example.
The information processor disclosed in the above publication comprises a main body having a CPU, a keyboard connected to the main body through a cable, and a cordless key unit which transmits/receives signals to/from the keyboard under a wireless (radio) condition. The cordless key unit is provided with a transmitter for transmitting infrared-ray signals or the like, and the keyboard is provided with a receiver for receiving the infrared-ray signals or the like. The signal from the transmitter of the cordless key unit is received by the receiver of the keyboard, and then transmitted to the main body through the cable.
Further, an information processor disclosed in Japanese Laid-open Patent Application No. Hei-5-108257 comprises a mouse having a transmitter for transmitting infrared-ray signals and a main body thereof which contains a receiver for receiving the infrared-ray signals.
Each of the above information processors is designed so that data transmission/reception (data communication) between the main body of the information processor and the keyboard or the mouse serving as input means is performed under a wireless (radio) condition (i.e., each information processor is developed in order to perform the cordless communication).
Recently, information processors are being used under such an environment as shown in FIG.
40
. When a desktop personal computer
1
is used as the information processor, it is a recent tendency that the depth dimension of the image processor is large because a CRT is used as a display device
2
and thus the information processor takes up a large amount of space on a desk. For example, most business men, dealers relating to the securities business, etc. usually use portable computers
3
in addition to their desk top type computes because they are required to often arrange data, make data files open, etc. at other places (which are remote from their offices). Therefore, when each of them puts his/her portable personal computer
3
on his/her desk in addition to a large-size desktop personal computer
1
, and further puts documents and writing materials on the desk, the effective area on the desk in which the user can freely work is remarkably reduced, and also the top of the desk becomes very cluttered.
SUMMARY OF THE INVENTION
As described above, in many cases, various equipment, documents, writing materials, etc. are arranged in a disorderly manner around the information processor on the desk. Therefore, the conventional information processors have such a problem that when documents or the like are located between the main body of the information processor and the cordless input means, a communication problem may occur between the main body and the input means.
The present invention has been implemented in view of the problem of the prior art, and has an object to provide an information processor, an input device thereof and a display device which can suppress the communication problem between the main body of the information processor or the display device and the input device to the minimum level.
Therefore, in order to attain the above object, a first information, processor according to the present invention which includes a main body having a CPU for performing various data processing, an input device for inputting data to the main body and a display device for displaying the data on a screen in accordance with an instruction from the main body, is characterized in that the input device includes:
plural input-side transmission means which transmit signals under wireless (radio) conditions and are disposed at different positions so as to face in different directions;
input-side identification code setting means for setting an identification code of the input device in the signals to be transmitted from the input-side transmission means,
one of the main body and the display device includes:
body-side reception means for receiving the radio signals from the input-side transmission means; and
body-side identification code setting means for setting the identification code of the input device, and
the main body includes signal control means for judging whether the same identification code as set by the body-side identification code setting means exists in the signal received by!the body-side reception means, and processing the signals received by the body-side reception means.
A second information processor to attain the above object is characterized in that in the first information processor, a plurality of body-side reception means are provided, and the plural body-side reception means are provided at different positions from one another.
A third information processor to attain the above object is characterized in that in the second information processor, the main body has a body cover having a front surface and right and left side surfaces, and the plural body-side reception means are respectively provided on the front surface, the left side surface and the right side surface, respectively.
A fourth information processor to attain the above object is characterized in that in the third information processor, a signal directivity guide portion is provided to each of the left side surface and the right side surface of the body cover to enhance the reception performance of each of the body-side reception means provided to the left side surface and the right side surface for radio signals transmitted from the front-surface side direction.
A fifth information processor to attain the above object is characterized in that in the second information processor the display device has a display screen and a display device cover which covers the edge of the display screen and has a front surface at the same side as the display screen, and at least one of the plural body-side reception means is provided to the front surface of the display device cover.
A sixth information processor to attain the above object is characterized in that in the first information processor, the plural input-side transmission means are input-side optical signal transmission means for transmitting optical signals as the radio signals, the body-side reception means is body-side optical signal reception means for receiving the optical signals as the radio signals, and the body-side optical signal reception means includes an optical guide having an optical input portion for receiving the optical signal and an optical output portion for outputting the optical signals from the optical input portion, and a light receiving element for receiving the optical signals from the optical output portion of the optical guide and converting the optical signals to electrical signals.
A seventh information processor to attain the above object is characterized in that in the sixth information processor the optical guide is designed such that the optical input portion has at least a one-dimensional spread, and the optical signal received at any position of the optical input portion is guided to the optical output portion.
An eighth information processor to attain the above object is characterized in that in the sixth information processor the body-side optical signal reception means has a plurality of optical guides, the respective optical input portions of the plural optical guides are located at different positions from one another, and each of the optical output portions of the plural optical guides is located so that the light receiving element can receive the optical signal from each optical output portion.
A ninth information processor to attain the above object is characteri
Gemma Hideaki
Inagaki Yukihide
Kamimaki Hideki
Kimura Koichi
Nakagawa Tsuyoshi
Antonelli Terry Stout & Kraus LLP
Hitachi , Ltd.
Hjerpe Richard
Nguyen Frances
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