JPH04519A - Information transmission system - Google Patents

Abstract

PURPOSE:To make it unnecessary to use a connection code and to remove noise by using a part of the screen of an already set display device as a transmitting means, turning on and off dots in an area used synchronously with a synchronizing signal for display to transmit data to the external, and receiving the light flashing information as data by an external compact information apparatus. CONSTITUTION:Data inputted by a keyboard 3 are entered into a personal computer 2, displayed on a CRT 3 and sent to an electronic notebook e.g. as data based upon light flashing. The light flashing data are inputted to the photodetecting part of the notebook 4 and converted into electrically memorable data, which are outputted to the display means of the notebook 4 or stored in a storage means. The photodetecting part is constituted of a photodiode 5 and an amplifier 6, a connection code between apparatuses is made unneces sary and radiation noise generated by connection can also be removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to communication means for information equipment and input means for the small-sized information equipment.

[Prior Art] In the past, information was transmitted between information devices by connecting serial or parallel interfaces built into each device with wired cables via connectors. In addition, input to the small information equipment was mainly performed using key switches equipped on the equipment.

[Problems and objects to be solved by the invention] However, in the prior art described above, when transmitting information, it is necessary to physically connect the information device and the small information device with a cable, which impairs the portability of the small information device. I had left it behind. In addition, in many information devices such as personal computers, serial and parallel communication interfaces are not placed on the front of the device but on the back, making it difficult to connect connectors.Also, due to its portability, dedicated connector cables are required. was necessary.

Furthermore, because of the portability of small information devices, the input means are small and the number of input keys is small, so one key must have many functions, making it difficult to input.

[Means for solving the problem] The information transmission system of the present invention includes a portable small-sized information device equipped with a simple display means and input means such as an electronic notebook, and an information device such as a personal computer equipped with a cathode ray tube display device. In the communication method, the information transmission system is characterized in that the display device is used as a transmission means, and the small-sized information device includes a detection means that reacts to visible light to transmit digital information.

[Operation] When transmitting digital information from an information device, the information device requires a control program and communication means for the transfer, but in the present invention, a part of the screen of the display device that is already installed is transmitted. Data is sent to the outside by flashing dots in the area used for transmission in synchronization with a synchronization signal for display. In the external small information device, the sent blinking information of the light is received as data by the detection means.

[Embodiment] An embodiment of the present invention will be described below with reference to a system configuration diagram and a receiving unit configuration diagram. FIG. 1 shows the system configuration during data transfer, and FIG. 2 shows the configuration of the receiving section within the electronic notebook. Data input using the keyboard 3 in FIG. 1 is taken into the personal computer 2. The data taken into the personal computer is displayed on the CRT 3, and is also converted into data by flashing lights and sent to the electronic notebook 4. The blinking light data is taken in by the light receiving section of the electronic notebook, converted into electrically storable data, and output to the display means of the electronic notebook or stored in the storage means. FIG. 2 shows a case where the aforementioned light receiving section is composed of a photodiode 5 and an amplifier 6, and optical data is converted into an electrical signal by the photodiode. Since the converted electrical signal is very weak, it is amplified by the amplifier.

[Effects of the Invention] As explained above, the present invention, when performing data communication between the information device and the portable small information device such as the electronic notebook, uses a photodetection element on the receiving side. This can be done without connecting the connection cord between the two. Furthermore, the input interface of the small information device can be improved by making the keyboard of the information device usable. Furthermore, since devices are connected using light, it is possible to reduce noise radiated from the devices.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of the information transmission system. FIG. 2 is a configuration diagram of the light receiving section. Figure 1 rt Personal computer keyboard Electronic notebook Photodiode amplifier Figure 2

Claims (1)

[Claims] In a communication method between a portable small information device equipped with a simple display means and input means such as an electronic notebook and an information device such as a personal computer equipped with a display device such as a cathode ray tube, the display device is used as a transmitting means, An information transmission system that transmits digital information by having a detection means that reacts to visible light in the small information device.