JP2006073032A - Wireless information transmission system and wireless receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce power consumption in a wireless information transmission system. <P>SOLUTION: The wireless information transmission system includes a wireless transmitter 1 transmitting information wirelessly and a wireless receiver 2 receiving the information transmitted from the wireless transmitter 1. The wireless transmitter 1 includes an input portion 102 used by a user to input instructions, a transmission portion 104 transmitting data, and an information generation control portion 103 transmitting the instructions to the wireless receiver 2 via the transmission portion 104 at predetermined intervals when the instructions are continuously inputted. The wireless receiver 2 includes a reception portion 108 receiving the data from the wireless transmitter 1, a memory portion 109 temporarily storing the data, and an information conversion control portion 107 relying on the data received by the reception portion 108 and the data stored in the memory portion 109 to output the data to an application program via an interface conversion control portion 106. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wireless information transmission system that wirelessly transmits information between a wireless transmission device and a wireless reception device, and in particular, malfunction even when transmission of information between the wireless transmission device and the wireless reception device is interrupted. The present invention relates to a wireless information transmission system and a wireless reception device that do not have to be performed.

  In information devices such as computers, there is a system that connects peripheral devices such as a keyboard and a mouse to a main device using wireless communication. In such a wireless information transmission system, when data is input to the peripheral device, the input data is wirelessly transmitted to the main device.

  For example, every time a key is depressed or released on a keyboard or the like, a code assigned to the key is transmitted to the main device side by radio. The main device performs a predetermined input / output operation based on the received code.

  However, the main device supports an auto repeat function that receives data from a peripheral device and does not receive a code for a certain period of time, and repeatedly inputs data corresponding to the received code to the application program. There may be. In the main unit that supports the auto repeat function, if the main unit fails to receive the code indicating the key release after receiving the code indicating the key press, the code indicating the next key press is actually Until the data is transmitted, unintended data continues to be input. A method for solving such a problem is disclosed in Patent Document 1.

  With reference to FIG. 14, an example of the operation according to this method will be described. For example, when the “A” key is depressed on the keyboard side, the main unit recognizes the depression of the “A” key by receiving the depression code, and inputs the character “a” to the application program. When the “A” key is released on the keyboard side, the main device recognizes the release of the “A” key by receiving the release code, and stops the input of the character “a”.

  Next, when the “B” key is depressed on the keyboard side, the main device recognizes the depression of the “B” key and inputs the character “b” to the application program. However, even if the “B” key is released, if the release code cannot be received by the main device, the character “b” is continuously input.

  In order to prevent this, the keyboard calculates the number of pressed keys and transmits it to the main unit as the pressed number information. The main device determines the state of the keyboard by sequentially referring to the number-of-press information, and determines that the key has been released. When all the keys on the keyboard are released, data indicating the number of presses 0 is transmitted from the keyboard to the main device. For this reason, even if the main device fails to receive the release code of the “B” key, it can confirm that there is no depressed key. Therefore, the main device can stop the repeat input of the character “b”.

This method can also be applied to a toggle operation that switches between setting and releasing the input mode by a series of code output of key depression and release, such as Caps lock. That is, even when reception of the Caps lock key release code fails, the main device can know the release of the Caps lock key by sequentially referring to the number-of-press information. For this reason, the toggle operation can be performed accurately, and the consistency of the state between the keyboard and the main device can be maintained.
JP-A-6-4197

  However, in the above method, for example, when a communication path failure occurs such that, after a certain key is pressed, the key data itself is not transmitted for a certain period or not transmitted at all, the key data itself indicating the number of times of pressing is 0. Will not be sent. For example, if a failure occurs in the keyboard-side wireless transmission unit or the main device-side wireless reception unit, the key data itself indicating the number of presses 0 is not sent. For this reason, as shown in FIG. 15, the auto-repeat state is maintained until such repair or until key information including the first pressing number after the repair is transmitted / received. Even if the main unit is operating normally, not only does the main unit appear to be malfunctioning when there is a keyboard communication error, but it may cause delays in the operation of other applications or malfunctions of the entire system. is there.

  In the above method, the keyboard repeatedly transmits a release code indicating that no key is depressed at a predetermined interval even after all keys are released. This is to supplement repeat cancellation at the time of reception failure by repeatedly transmitting a state in which the key is not pressed, and is necessary to prevent the above-described apparent malfunction. On the other hand, a wireless signal is being transmitted from the keyboard despite the fact that the event that the key is actually pressed does not occur. This has a great influence particularly on a wireless device that operates on a battery, and causes unnecessary power consumption.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a wireless information transmission system that prevents a key input from being automatically repeated even when a failure occurs in a communication path. Is to provide.

  Another object of the present invention is to provide a wireless information transmission system and a wireless receiving apparatus that suppress unnecessary power consumption.

  A wireless information transmission system according to an aspect of the present invention includes a wireless transmission device that wirelessly transmits information and a wireless reception device that wirelessly receives information transmitted from the wireless transmission device, the wireless transmission device receiving an instruction. When the input unit is connected to the transmission unit side transmission unit for wirelessly transmitting information to the wireless reception device, the input unit and the transmission unit side transmission unit, and an instruction is continuously input from the input unit In addition, information generation control means for transmitting instructions at predetermined intervals via the transmission apparatus side transmission means, and transmission apparatus side reception means for receiving information transmitted by radio from the wireless reception apparatus The wireless receiving device includes a receiving device-side receiving means for receiving an instruction transmitted from the wireless transmitting device by radio, and a receiving device. An operating means connected to the receiving means for operating in accordance with the instructions received by the receiving apparatus side receiving means; and a receiving apparatus side transmitting means for wirelessly transmitting information to the wireless transmitting apparatus, the operating means comprising: When the instruction from the wireless transmission device is not received for a certain period, the request retransmission request is transmitted to the wireless transmission device via the reception device side transmission means, and the information generation control means is transmitted via the transmission device side reception means. When the retransmission request is received, the instruction is retransmitted via the transmission means.

  According to the present invention, when an instruction is continuously input from the input unit, the instruction is transmitted from the wireless transmission device at a predetermined interval. For this reason, instruction transmission from the wireless transmission device can be minimized, power consumption can be reduced, and it can be used for detecting a failure in the communication path.

  As the input means, a device including one or a plurality of input keys, buttons, or a touch panel, such as a mouse, a keyboard, or a remote controller is used.

  In addition, bidirectional communication between the wireless transmission device and the wireless reception device becomes possible. For this reason, the reliability with respect to data transmission can be improved by exchanging data suitably between both apparatuses.

  A wireless information transmission system according to another aspect of the present invention includes a wireless transmission device that wirelessly transmits information and a wireless reception device that wirelessly receives information transmitted from the wireless transmission device, the wireless transmission device including instructions Is connected to the input unit, the transmission unit side transmission unit for wirelessly transmitting information to the wireless reception device, the input unit and the transmission unit side transmission unit, and the instruction is continuously input from the input unit The information generation control means for transmitting the instruction at predetermined intervals via the transmission apparatus side transmission means, and the wireless reception apparatus for receiving the instruction transmitted by radio from the wireless transmission apparatus Connected to the receiving device side receiving means, storage means for temporarily storing information received from the wireless transmitting device, and receiving device side receiving means. Operating means for operating according to the instruction received by the receiving device side receiving means, and the operating means temporarily stores data in the storage means when the instruction is not transmitted from the wireless transmitting apparatus for a predetermined period. Information stored in memory is deleted.

  According to the present invention, when an instruction is continuously input from the input unit, the instruction is transmitted from the wireless transmission device at a predetermined interval. For this reason, instruction transmission from the wireless transmission device can be minimized, power consumption can be reduced, and it can be used for detecting a failure in the communication path.

  As the input means, a device including one or a plurality of input keys, buttons, or a touch panel, such as a mouse, a keyboard, or a remote controller is used.

  In addition, when the instruction is not transmitted from the wireless transmission device for a predetermined period, the operation unit deletes information temporarily stored in the storage unit. As a result, unnecessary data can be prevented from being accumulated.

  In the wireless information transmission system according to the present invention, the input unit includes an input unit that is turned on or off by an external operation, and the transmission device-side transmission unit transmits information for changing the state of the input unit and operates. In the case where information indicating that the input unit is in the on state is stored in the storage unit, and when an instruction to turn off the input unit is not transmitted from the wireless transmission device for a predetermined period, It is preferable to output an instruction to turn off the input unit to the receiving device side receiving means.

  If the wireless reception device determines that the instruction from the wireless transmission device has been completed, the wireless reception device can perform processing such as canceling the repeat function without being affected by the communication path failure.

  In the wireless information transmission system according to the present invention, the input unit is preferably a key.

  In the wireless information transmission system according to the present invention, the wireless transmission device further includes transmission device side reception means for receiving information transmitted by radio from the wireless reception device, and the wireless reception device further includes a wireless transmission device. It is preferable to include a receiving device side transmitting means for transmitting information wirelessly.

  The wireless reception device according to the present invention is used in a wireless information transmission system including a wireless transmission device that transmits information wirelessly and a wireless reception device that wirelessly receives information transmitted from the wireless transmission device. The wireless receiving device includes a receiving device side receiving unit for receiving an instruction transmitted from the wireless transmitting device by radio, a storage unit for temporarily storing information received from the wireless transmitting device, and a receiving device side An operation that is connected to the receiving means, operates according to the instruction received by the receiving apparatus side receiving means, and deletes information stored in the storage means when the instruction is not transmitted from the wireless transmitting apparatus for a predetermined period. Means.

  The operating unit deletes the information temporarily stored in the storage unit when no instruction is transmitted from the wireless transmission device for a predetermined period. As a result, unnecessary data can be prevented from being accumulated.

  The wireless reception device according to the present invention further includes a reception device side transmission means for wirelessly transmitting information to the wireless transmission device, and the operation means sends an information transmission permission signal to the reception device side every time predetermined processing is completed. It is preferable to transmit to the wireless transmission device via the transmission means.

  In the wireless reception device according to the present invention, the operating means determines that the instruction from the wireless transmission device is completed when the instruction is not transmitted from the wireless transmission device even though the information transmission permission signal is transmitted a predetermined number of times. Is preferred.

  When the information generation control means of the wireless transmission device detects the occurrence of a key press event, it changes the key status for that key to the pressed state. The information generation control unit transmits the key data of the key pressed using the transmission device side transmission unit to the wireless reception device.

  The information generation control means transmits the key data, holds the key status until the pressed key is released, and determines the state for each specified period. Referring to FIG. 1, when the held status does not change, that is, when the key remains pressed, the same key data as that transmitted last time is transmitted to the wireless reception device.

  Thus, wireless data is transmitted every specified period while the key is pressed. If the status is held in the pressed state, the wireless reception device expects the same data to be transmitted from the wireless transmission device at least once every prescribed period.

  If the same data is not transmitted from the wireless transmitter within the specified period, the operation means determines that there is a failure in the communication path, cancels the state when it is in the auto repeat state, and auto repeat when it is not in the auto repeat state. Suppresses entering the state.

  Next, consider a wireless information transmission system in which each of the wireless transmission device and the wireless reception device has transmission means and reception means. Similar to the information generation control unit in the wireless information transmission system described above, the information generation control unit of the wireless transmission device transitions the key status to the pressed state when a key press event occurs, and To transmit key data to the wireless receiver.

  The information generation control means repeatedly transmits the same data as the previously transmitted key data or status information indicating the same key input to the wireless reception device at a predetermined time until the key is released.

  The wireless receiver expects to have the same data transmission from the wireless transmitter at least once every fixed period if any key is held in the pressed state. However, if the same data transmission from the wireless transmission device expected within the specified time or the status transmission indicating the same key input is not performed, the operation means of the wireless reception device determines that some trouble has occurred in the communication path. To do. Thereafter, the wireless reception device transmits control data (retransmission request) to the wireless transmission device in order to confirm a communication path failure. The wireless transmission device that has received the control data from the wireless reception device executes key code retransmission processing.

  The wireless receiver determines whether or not data has been received and the content of the received data after transmitting the control data, and has not received status information indicating the same data or the same key input, and is in an auto-repeat state In some cases, processing for canceling the auto repeat state is performed. Further, when not in the auto repeat state, processing for preventing the auto repeat state from being entered is performed.

  In addition, when the operation unit of the wireless reception device recognizes that some kind of failure has occurred in the communication path, it transmits control data to the wireless transmission device. At the same time, the operating means performs processing for canceling the state when in the auto-repeat state, and performs processing for suppressing entry into the auto-repeat state when not in the auto-repeat state.

  Next, a description will be given of a wireless information transmission system in which the operating means of the wireless receiving device gives information transmission permission to the wireless transmitting device, and the wireless transmitting device performs information transmission based on the given transmission permission.

  Similar to the information generation control unit of the wireless transmission device described above, the information generation control unit of the wireless transmission device transitions the status for the key to the pressed state when a key press event occurs. The information generation control unit generates key data to be transmitted to the wireless reception device, and waits for information transmission permission from the wireless reception device. The information generation control means transmits the key data to the wireless receiving device for the first time after receiving the transmission permission from the wireless receiving device.

  The operation means of the wireless receiving device determines whether or not data is received and the content of the received data after transmitting the control data. When the status information indicating the same data or the same key input has not been received and the auto repeat state is set, the operating means executes a process for canceling the auto repeat state. When not in the auto repeat state, the operating means performs a process for preventing the auto repeat state from being entered.

  The input means of the wireless transmission device can also be configured using a plurality of elements. As an example, a keyboard equipped with a pointing device such as a trackball may be used as the input means together with a plurality of keys.

  In the device having such a configuration, a part for processing the signal of the pointing device and a part for processing the input signal of the keyboard exist in parallel. For this reason, the information generation control means may handle these input signals in an integrated manner. In other words, the information generation control means directly controls the transmission means on the transmission side, so that even when there are a plurality of input means, a mechanism that exclusively occupies the transmission means is given to each input means. There is no need. The information generation control unit generates data to be transmitted from an event that occurs independently for each input unit, and transmits the data to the wireless reception device through the transmission unit.

  A format may be determined in advance so that a plurality of events can be transmitted as a single data in case an event occurs simultaneously from a plurality of input means. In this way, the information generation control unit can notify the wireless reception device of a plurality of events with a single data.

  While the input key is pressed, the wireless transmission device transmits information to the wireless reception device every specified time or whenever the information transmission permission given from the wireless reception device reaches a specified number of times. For this reason, the wireless transmission device sequentially checks whether the same data is received while the key is pressed, and if the reception is interrupted, a communication path failure occurred during the information transmission. It can be judged. When a communication path failure occurs, the wireless transmission device can execute processing for canceling the auto-repeat state. Therefore, it is possible to provide a wireless information transmission system that is not affected by the failure of the communication path.

  By adjusting the specified time or the specified number of times used to determine whether or not a communication channel failure has occurred, the time until it is determined that a communication channel failure has occurred is automatically set. It can be made shorter than the time until the repeat state is entered. With such a setting, it is possible to suppress an auto-repeat state when a failure occurs in the communication path.

  The wireless transmission device only needs to transmit data for a limited period while the key is pressed. For this reason, the power consumption of wireless peripheral devices, such as a keyboard driven by a battery, can be suppressed.

  In addition, the amount of information to be transmitted can be reduced by transmitting information using status information instead of key data that normally requires several bytes. As a result, the time required for information transmission can be reduced, and power consumption can be reduced.

  In addition, when a communication abnormality is detected in the wireless reception device, it is possible to expect improvement in reliability of data transmission by transmitting control data indicating a data retransmission request to the wireless transmission device.

(Embodiment 1)
Hereinafter, a wireless information transmission system according to Embodiment 1 of the present invention will be described with reference to the drawings.

  Referring to FIG. 2, the wireless information transmission system includes a wireless transmission device 1 that transmits information by radio and a wireless reception device 2 that receives information transmitted from the wireless transmission device 1.

  The wireless transmission device 1 includes an input unit 102 used by a user to input an instruction, and information generation that is connected to the input unit 102 and generates data according to a predetermined format based on a signal output from the input unit 102 It includes a control unit 103 and a transmission unit 104 that is connected to the information generation control unit 103, converts an output of the information generation control unit 103 into a wireless signal 110, and transmits the signal to the outside. As the wireless signal 110, an RF (Radio Frequency) signal, an infrared signal, or the like can be considered.

  The wireless reception device 2 is connected to the reception unit 108 that receives the wireless signal 110 transmitted from the wireless transmission device 1, and is connected to the reception unit 108. The wireless reception device 2 converts and reconfigures the output of the reception unit 108 according to a predetermined format. An information conversion control unit that stores the reconstructed data as necessary in a storage unit 109 described later and controls an interface conversion control unit 106 described later based on the data and the data stored in the storage unit 109. 107, connected to the information conversion control unit 107, connected to the information conversion control unit 107, and connected to the storage unit 109 for temporarily storing data, and the data provided from the information conversion control unit 107 is wirelessly transmitted according to an appropriate procedure. Interface that is transferred to an application program (not shown) that runs on the receiving device 2 And a scan converter control unit 106. The application program is assumed to have the above-described auto-repeat function, which includes the case of basic software (OS (Operation System)).

Each part of the wireless transmission device 1 will be described in more detail.
The input unit 102 is a device having one or a plurality of input keys, buttons, or a touch panel, such as a mouse, a keyboard, a game pad, a joystick, or a remote controller. The input unit 102 notifies the information generation control unit 103 of a signal indicating an event generated by an operation performed on the input unit 102 by the user, such as a key press or a button release.

  In the following description, the event generation target in the input unit 102 is described as being limited to the key, but a physically formed button may be used instead of the key. Moreover, the area | region etc. which were divided on the touchscreen by the boundary and were formed so that selection was possible may be sufficient.

  The information generation control unit 103 includes a controller such as one or a plurality of ICs (Integrated Circuits). The information generation control unit 103 performs control for wirelessly transmitting the signal output from the input unit 102 using the transmission unit 104 as described above. At the same time, the information generation control unit 103 has a timer function and is configured to be able to execute a necessary process every predetermined period.

Next, each part of the wireless reception device 2 will be described in more detail.
The information conversion control unit 107 includes a controller such as one or a plurality of ICs. The information conversion control unit 107 has a timer function in addition to the functions described above, and can execute a necessary process for each predetermined period.

  With reference to FIG. 3, the data transmission process by the information generation control unit 103 of the wireless transmission device 1 will be described.

  The information generation control unit 103 initializes itself (S2). That is, the information generation control unit 103 detects the event when key input (key depression) or key release is performed at the input unit 102, and makes the wireless signal transmittable. The information generation control unit 103 detects whether or not an event related to the key has occurred (S3). When a key input or key release event occurs (YES in S3), the information generation control unit 103 determines which key the event relates to, and confirms the status of the key (S4). Each key has two statuses (states), on and off, indicating on when the key is depressed and off when released.

  By checking the status of the corresponding key, it is possible to determine whether the event has occurred due to the key being pressed for the first time or has occurred due to the key being released.

  When an event occurs due to the input of a specific key for the first time, the status of the corresponding key is OFF (NO in S4), so the status relating to that key is changed from OFF to ON. . When an event for releasing a key occurs, the status of the corresponding key is in the on state (YES in S4), so the status relating to that key is changed from the on state to the off state (S5).

  When a key input event occurs, if there is another new key input when the status of the specific key is in the on state, the information generation control unit 103 sets the status related to the new input key to the on state and has been turned on before. The specific key status may be turned off. However, in this case, only when the key release event is adapted to an arbitrary key.

  After the process of S5 or S6, the information generation control unit 103 generates data to be transmitted to the wireless reception device 2 (S7). As a result, the key identification result received from the input unit 102 is converted into an appropriate key code, that is, an appropriate data format.

  The transmission unit 104 converts the generated data to be transmitted to the wireless reception device 2 into a wireless signal, and transmits the wireless signal to the wireless reception device 2 (S8).

  After the data is transmitted to the wireless receiver 2, the key status is confirmed for all keys (S12). At this time, if there is an on-state key (YES in S12), the information generation control unit 103 measures the specified time in order to transmit the key data to the wireless reception device 2 every specified time. A timer is started (S9). Thereafter, the control returns to S3. If there is no key whose key status is on (NO in S12), the timer is not started and the control returns to S3.

  If any key event does not occur when the key event is detected in S3 (NO in S3), the key status for all keys is confirmed (S10). If the key statuses of all keys are OFF, it is determined that all keys are not pressed (NO in S10), and the process proceeds to S3 key event detection. If the key status of any key is on, any key has been pressed (YES in S10), so the information generation control unit 103 determines whether the timer has reached a specified time. Is determined (S11). If the timer has not expired (NO in S11), key event detection is continued in S3.

  If the timer has expired (YES in S11), transmission data is generated (S7) and transmitted to the wireless receiver 2 (S8). The transmission data transmitted to the wireless reception device 2 is the same as the data transmitted to the wireless reception device 2 last time. As described above, while a specific key is being pressed, the same data is transmitted every time the timer reaches a specified time (YES in S11).

  When the key that has been pressed is released, the release event of the key is detected in S3 (YES in S3), and the key status is confirmed (S4). Since the key status at that time is in the on state (YES in S4), the status of the key is updated from the on state to the off state (S5). Thereafter, key data indicating key release is generated as transmission data (S7) and transmitted to the wireless reception device 2 (S8). Thereafter, after confirming that the key status is OFF (NO in S12), the process proceeds to the key event detection process in S3.

  With reference to FIG. 4, the data reception process by the information conversion control unit 107 of the wireless reception device 2 will be described.

  The information conversion control unit 107 executes an initialization process (S22). As a result, the storage unit 109 and the interface conversion control unit 106 are initialized. At the same time, the receiving unit 108 is in a state where it can receive a wireless signal transmitted from the wireless transmission device 1.

  The information conversion control unit 107 detects whether data has been received (S23). If any wireless signal is received (YES in S23), it is determined whether the received data is the same as the previously received data stored in the storage unit 109 (S24).

  If the received data and the data stored in storage unit 109 are different (NO in S24), information conversion control unit 107 performs key input on the received data at input unit 102 of wireless transmission device 1. It is checked whether the key data indicates that the key has been released or the key data indicates that the key has been released (S25). That is, the key code is detected from the key data, and the key status of the key corresponding to the key code is checked. When the key status is on, it indicates that data indicating that the same key input has been performed last time has been received. When the key status is OFF, it indicates that the key is not pressed.

  If the key status is off, to indicate that a new key entry has been made (NO in S25), the status for that key is turned on (S26). Thereafter, the received data is temporarily stored in the storage unit 109 (S27), and is output to the interface conversion control unit 106 (S28). The interface conversion control unit 106 that has received the received data passes the data to the application program.

  When a new key is input, when the status of a certain key is already on, the information conversion control unit 107 is configured to turn off the key status of the key that is already on. It may be. However, in this case, it is limited to the case where the data indicating the key release is adapted to any input key.

  After the data is output to the interface conversion control unit 106, if the same data transmission is not performed from the wireless transmission device 1 within a specified time, it can be considered that some trouble has occurred in the communication path. In order to make the determination, the information conversion control unit 107 activates a timer that measures a specified time (S29).

  When the receiving unit 108 receives the same data as the data received last time and stored in the storage unit 109 (YES in S23, YES in S24), the process immediately proceeds to S29, and every predetermined time Restart the timer for data output. At that time, the operation such as changing the key status is not performed.

  If the receiving unit 108 has not received key data (NO in S23), the information conversion control unit 107 checks the key status of all keys (S30). If the key statuses of all the keys are in the off state, it is determined that all the keys are not pressed (NO in S30), and the control returns to S23.

  If there is a key whose key status is on (YES in S30), the information conversion control unit 107 determines whether or not the timer set at the specified time has expired (S31). If the timer has not expired (NO in S31), the process proceeds to the data reception detection process in S23.

  If the timer has expired (YES in S31), the information conversion control unit 107 erases the data stored in the storage unit 109 and outputs a code indicating key release to the interface conversion control unit 106 (S32). . The interface conversion control unit 106 delivers a code indicating key release to the application program.

  Thereafter, the information conversion control unit 107 changes the key status in the on state to the off state (S33). The information conversion control unit 107 checks whether or not the timer is operating (S34). At this time, since the timer has expired and is stopped (YES in S34), the process proceeds to S23.

  When the receiving unit 108 receives the key release code (YES in S25), the information conversion control unit 107 erases the data stored in the storage unit 109 and converts the code indicating the key release to interface conversion. It outputs to the control part 106 (S32). The interface conversion control unit 106 delivers a code indicating key release to the application program.

  The information conversion control unit 107 changes the key status in the on state to the off state (S33). The information conversion control unit 107 determines whether or not the timer is operating (S34). At this time, since the timer has not expired and is operating (NO in S34), the specified time timer is stopped (S35), and then the process proceeds to S23.

  As described above, data is transmitted from the wireless transmission device 1 to the wireless reception device 2 at predetermined time intervals while the key is pressed.

  Further, the wireless reception device 2 can independently make a determination for canceling the auto-repeat state of the key by checking the key status even when data is not received. Therefore, even when the communication path is interrupted and the key release data is not transmitted from the wireless transmission device 1 to the wireless reception device 2, the wireless reception device 2 can cancel the key auto-repeat state. .

  If the specified time measured by the timer of the wireless receiver 2 is set to be shorter than the time for the application program to automatically enter the key auto-repeat state, the intention is It is possible to avoid the auto-repeat state that does not occur.

  The wireless transmission device 1 may perform data transmission only for a limited period while the key is pressed. For this reason, the power consumption of the wireless transmission device 1 can be reduced. In particular, a wireless peripheral device such as a keyboard driven by a battery can be used for a long time by reducing power consumption.

(Embodiment 2)
The wireless information transmission system according to Embodiment 2 of the present invention has the same hardware configuration as that of the wireless information transmission system according to Embodiment 1 described with reference to FIG. Therefore, detailed description thereof will not be repeated here.

  In the wireless information transmission system of the second embodiment, the data transmission processing by the information generation control unit 103 of the wireless transmission device 1 and the data reception processing by the information conversion control unit 107 of the wireless reception device 2 are partially different from those of the first embodiment. . Hereinafter, each process will be described focusing on the differences.

  With reference to FIG. 5, the data transmission processing by the information generation control unit 103 of the wireless transmission device 1 will be described. In the data transmission process according to the first embodiment shown in FIG. 3, while the key is pressed, the same data is transmitted every specified time, whereas the data transmission process according to the second embodiment is performed. Then, while the key is pressed, data is transmitted every specified time in common, but the difference is that status notification data described later is transmitted.

  The same processes as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof will not be repeated here.

  When an event for releasing a key occurs, the key status of the corresponding key should be in the on state (YES in S3, YES in S4), and the information generation control unit 103 displays the key status regarding the key. The on state is changed to the off state (S5). Thereafter, the information generation control unit 103 generates status notification data indicating a state in which the key is released (S13). The status notification data is data to which an identifier that can clearly discriminate the difference from the key data itself is attached, and is data indicating a state of either key press or key release. In other words, information regarding the key code is not attached to the status notification data. Status notification data indicating key release is transmitted to the wireless receiver 2 (S8).

  When the timer set at a specified time expires in a state where the key is pressed (YES in S10, YES in S11), the information generation control unit 103 indicates that the key is pressed. Status notification data is generated (S13) and transmitted to the wireless receiver 2 (S8).

  With reference to FIG. 6, the data reception process by the information conversion control unit 107 of the wireless reception device 2 will be described. In the data reception process shown in FIG. 4, the determination as to whether the same data has been received and the determination as to whether the key release data has been received are made by referring to the key data, whereas the data in FIG. In the reception process, this determination is made by referring to the status notification data.

  Processes similar to those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof will not be repeated here.

  When any wireless data is received (YES in S23), the information conversion control unit 107 determines whether the received data is status notification data (S40). If the received data is status notification data (YES in S40), the contents of the status notification data are examined (S42). If the status notification data indicates key release (YES in S41), the processing after S32 is performed, and the processing for outputting the key release data to the interface conversion control unit 106 is performed.

  If the status notification data indicates a key press (NO in S41), the processing from S29 is performed. That is, the information conversion control unit 107 activates a timer that measures a specified time in order to determine whether or not any failure has occurred in the communication path.

  If the received data is not status notification data (NO in S40), normal key data has been received, and data output processing is performed after S26.

  In the second embodiment, status notification data is appropriately transmitted instead of key data. Since the status notification data does not include a key code, the amount of information is smaller than that of the key data. For this reason, the amount of data flowing on the communication path can be kept to the minimum necessary, and as a result, power consumption can be reduced.

(Embodiment 3)
Referring to FIG. 7, the wireless information transmission system according to Embodiment 3 of the present invention receives a wireless transmission device 3 that transmits and receives information by radio, information transmitted from wireless transmission device 3, and And a wireless receiver 4 that transmits information to the wireless transmitter 3.

  The wireless transmission device 3 includes an input unit 102 used by a user to input an instruction, and information generation that is connected to the input unit 102 and generates data according to a predetermined format based on a signal output from the input unit 102 And a control unit 203.

  The wireless transmission device 3 is further connected to the information generation control unit 203, and is connected to the storage unit 204 that temporarily stores the data generated by the information generation control unit 203 and the information generation control unit 203. The data output from the unit 203 is converted into a wireless signal 110 and transmitted to the outside. The receiving unit 205 is connected to the information generation control unit 203 and outputs data received from the outside to the information generation control unit 203. Including.

  The wireless reception device 4 receives a wireless signal 110 transmitted from the wireless transmission device 1, and an information conversion control unit that is connected to the reception unit 108 and converts data received from the reception unit 108 according to a predetermined format. 209.

  The wireless reception device 4 is further connected to the information conversion control unit 209, and is connected to the storage unit 109 for temporarily storing data and the information conversion control unit 209, and receives the data given from the information conversion control unit 209. An interface conversion control unit 106 that passes to an application program (not shown) operating on the wireless reception device 4 in an appropriate procedure, and the information conversion control unit 209 are connected to the data conversion control unit 209 and the data output from the information conversion control unit 209 is wireless A transmission unit 210 that converts the data into transmittable data and transmits the data to the wireless transmission device 3.

  The information generation control unit 203 of the wireless transmission device 3 will be described in further detail. The information generation control unit 203 includes a controller such as one or a plurality of ICs. The information generation control unit 203 performs control for wirelessly transmitting the signal output from the input unit 102 using the transmission unit 104 as described above. At the same time, the control data received and converted by the receiving unit 205 is interpreted, and processing based on the control data is executed.

  The information generation control unit 203 uses the storage unit 204 to temporarily store communication data and refer to the data.

  The information conversion control unit 209 of the wireless reception device 4 will be described in further detail. The information conversion control unit 209 includes a controller such as one or a plurality of ICs. The information conversion control unit 209 has a timer function in addition to the above-described functions, and can execute a necessary process at every specified time. At the same time, the information conversion control unit 209 creates control data from the data received from the reception unit 108 and the result of processing using the timer function, and transmits the control data to the wireless transmission device 3 via the transmission unit 210.

  With reference to FIG. 8, the data transmission processing by the information generation control unit 203 of the wireless transmission device 3 will be described. In the following description, the same processes as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof will not be repeated here.

  The information generation control unit 203 executes an initialization process (S50). In the initialization process, the information generation control unit 203 is set in a state in which a key input event and a key release event can be detected, the transmission unit 104 is set in a state in which the wireless signal 110 can be transmitted, and the reception unit 205 is set in a wireless reception device. 4 is a process of making the wireless signal 212 including the control data transmitted from 4 ready to be received.

  After the initialization process (S50) is performed, the information generation control unit 203 determines whether the reception unit 205 has received control data from the wireless reception device 4 (S51).

  When the control data is received (YES in S51), the information generation control unit 203 refers to the transmitted data stored in the storage unit 204 and retransmits the same data to the wireless reception device 4. Therefore, retransmission data is created (S52). Thereafter, retransmission data is transmitted from the transmission unit 104 to the wireless reception device 4. At the same time, the information generation control unit 203 stores the transmitted data in the storage unit 204 (S53). Thereafter, the processing after S12 is performed.

  With reference to FIG. 9, the data reception process by the information conversion control unit 209 of the wireless reception device 4 will be described. In the following description, processes similar to those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof will not be repeated here.

  The information conversion control unit 209 executes an initialization process (S61). In the initialization process, in addition to the initialization process of the storage unit 109 and the initialization process of the interface conversion control unit 106, the wireless transmission device 3 is made ready to transmit control data including the wireless signal 212. An initialization process of the transmission unit 210 is included.

  After the initialization process, the information conversion control unit 107 detects whether data is received (S23). If any wireless signal is received (YES in S23), it is determined whether the received data is equal to the previously received data stored in the storage unit 109 (S24).

  If the received data is different from the data stored in the storage unit 109 (NO in S24), the information generation control unit 203 determines whether the received data is release data (S25). If the received data is key input data (NO in S25), the status for the key is turned on (S26), and the received data is stored in the storage unit 109 (S27). The information conversion control unit 209 outputs the same data to the interface conversion control unit 106 (S28). The interface conversion control unit 106 that has received the received data passes the data to the application program. Thereafter, the information conversion control unit 209 activates a timer that is used to detect a communication failure and measures a specified time (S29).

  Subsequently, the information conversion control unit 209 determines whether or not the control timer is running (S66). The control timer is a different type of timer from the specified time timer. The control timer is a timer used to determine whether or not the wireless transmission device 3 responds to a data retransmission request. The data retransmission request is transmitted from the transmission unit 210 to the wireless reception device after a specified time timer expires, as will be described later.

  Usually, the time until the control timer expires is set to be shorter or equivalent to the time until the specified time timer activated in S29 expires.

  If wireless data has been received from the wireless transmission device 3 or key release data has been output at the transition timing to S66, there is no need to activate a control timer for confirming data retransmission. Therefore, the information conversion control unit 209 confirms whether or not the control timer is activated (S66). If the control timer is activated (YES in S66), the information conversion control unit 209 stops the control timer (S67), and proceeds to S23. Transition. If the control timer is stopped (NO in S66), the information conversion control unit 209 performs no processing and proceeds to S23.

  In the process of S31, when it is determined that the specified time timer has expired and data reception from the wireless transmission device 3 that should have been expected during the specified time is not permitted (YES in S31). The information conversion control unit 209 determines whether or not the control timer is running (S62).

  If the control timer is not activated (NO in S62), the information conversion control unit 209 transmits control data indicating a retransmission request to the wireless transmission device 3 via the transmission unit 210 (S64). At the same time, the information conversion control unit 209 starts a control timer (S65). As described above, the control timer is a timer used to determine whether or not the wireless transmission device 3 has responded to control data indicating a retransmission request from the wireless reception device 4. After starting the control timer in S65, the control proceeds to S23.

  The control data transmitted in the process of S64 is a data retransmission request for recovery when the communication path is temporarily interrupted. If no data is received before the control timer activated in S65 expires, it is determined that the communication path is in an unrecoverable state.

  If it is determined in S62 that the control timer is activated (YES in S62), it is checked whether or not the control timer has expired (S63). If the control timer has not expired (NO in S63), the process proceeds to S23.

  If the control timer has expired (YES in S63), it can be determined that the communication path is blocked due to a failure and is in an unrecoverable state. For this reason, the information conversion control unit 209 erases the data stored in the storage unit 109 and outputs a code indicating key release to the interface conversion control unit 106 (S32). The interface conversion control unit 106 delivers a code indicating key release to the application program.

  The information conversion control unit 209 changes the key status in the on state to the off state (S33), and determines whether or not the specified time timer is activated (S34).

  If the specified time timer has not been started (NO in S34), the process proceeds to S66, and if the specified time timer has been started (YES in S34), the information conversion control unit 209 stops the specified time timer. (S35), the process proceeds to S66.

  As described above, the wireless reception device 4 transmits a data retransmission request to the wireless transmission device 3 if the wireless reception device 4 does not receive data during the specified time. If data cannot be received even after waiting for a predetermined time after transmitting the data retransmission request, it is determined that a failure has occurred in the communication path, and the key release data is output to the interface conversion control unit 106. The For this reason, even when the communication path is interrupted and the key release data is not transmitted from the wireless transmission device 3 to the wireless reception device 4, the wireless reception device 4 can cancel the auto-repeat state of the key. .

(Embodiment 4)
The wireless information transmission system according to Embodiment 3 of the present invention has the same hardware configuration as the wireless information transmission system according to Embodiment 3 described with reference to FIG. Therefore, detailed description thereof will not be repeated here.

  In the wireless information transmission system according to the fourth embodiment, the data transmission processing by the information generation control unit 203 of the wireless transmission device 3 and the data reception processing by the information conversion control unit 209 of the wireless reception device 4 are partially different from the wireless transmission device 3. Different. Hereinafter, each process will be described focusing on the differences.

  With reference to FIG. 10, the data transmission processing by the information generation control unit 203 of the wireless transmission device 3 will be described. In the data transmission process shown in FIG. 8, the same data is transmitted while the key is pressed. On the other hand, the data transmission process of FIG. 10 is common in that data is transmitted every specified time, but differs in that the status notification data described in the second embodiment is transmitted.

  The same processes as those in FIG. 5 or FIG. 8 are denoted by the same reference numerals, and detailed description thereof will not be repeated here.

  After the initialization process (S50), the information generation control unit 203 determines whether the reception unit 205 has received control data from the wireless reception device 4 (S51).

  When the control data is received (YES in S51), the information generation control unit 203 confirms the key status for all the keys, and creates status notification data corresponding to the confirmation result (S57). That is, if all the keys are not pressed, the information generation control unit 203 creates status notification data indicating the key release state. In other cases, status notification data indicating a key press state is generated.

  The created data is transmitted to the wireless reception device 4 (S8). Thereafter, the processing after S8 is performed. Since other processes are the same as the data transmission process of FIG. 5, detailed description thereof will not be repeated here.

  With reference to FIG. 11, the data reception process by the information conversion control unit 209 of the wireless reception device 4 will be described. In the data reception process shown in FIG. 9, the determination of whether or not the same data has been received and the determination of whether or not the key release data has been received are made by referring to the key data, whereas the data of FIG. In the reception process, this determination is made by referring to the status notification data.

  The same processes as those in FIG. 9 are denoted by the same reference numerals, and detailed description thereof will not be repeated here.

  After detecting any wireless data reception in S23 (YES in S23), the information conversion control unit 209 determines whether or not the received data is status notification data (S40).

  If the received data is not status notification data (NO in S40), the processing from S26 onward is executed to indicate that a new key input has been performed.

  If the received data is status notification data (YES in S40), the contents of the status notification data are determined (S41). If the status notification data is data indicating key release (YES in S41), the processing after S32 is performed, and processing for outputting the key release data to the interface conversion control unit 106 is executed (S32).

  When the received status notification data is data indicating a key press, it is used to detect a communication failure, and the information conversion control unit 209 starts a timer for measuring a specified time (S29).

  After starting the specified time timer in S29, the information conversion control unit 209 determines whether or not the control timer is being started (S66). As described in the third embodiment, the control timer is a different type of timer from the specified time timer. The control timer is used to determine whether or not the wireless transmission device 3 has responded to the data retransmission request. The data retransmission request is transmitted from the transmission unit 210 to the wireless reception device after the specified time timer expires.

  If wireless data has been received from the wireless transmission device 3 or key release data has been output at the transition timing to S66, there is no need to activate a control timer for confirming data retransmission. Therefore, the information conversion control unit 209 checks whether or not the control timer is activated (S66). If the control timer is activated (YES in S66), the information conversion control unit 209 stops the control timer (S67) and proceeds to S23. To do. If the control timer is stopped (NO in S66), the information conversion control unit 209 performs no processing and proceeds to S23.

  In the process of S31, when it is determined that the specified time timer has expired and data reception from the wireless transmission device 3 that should have been expected during the specified time is not permitted (YES in S31). The information conversion control unit 209 checks whether the control timer is running (S62).

  If the control timer is not activated (NO in S62), the information conversion control unit 209 transmits control data indicating a retransmission request to the wireless transmission device 3 via the transmission unit 210 (S64). At the same time, the information conversion control unit 209 starts a control timer (S65). As described above, the control timer is a timer used to determine whether or not the wireless transmission device 3 has responded to control data indicating a retransmission request from the wireless reception device 4. After starting the control timer in S65, the control proceeds to S23.

  The control data transmitted in the process of S64 is a data retransmission request for recovery when the communication path is temporarily interrupted. If no data is received before the control timer activated in S65 expires, it is determined that the communication path is in an unrecoverable state. Usually, the time until the control timer expires is set to be shorter or equivalent to the specified time timer activated in S29.

  If it is determined in S62 that the control timer is activated (YES in S62), it is checked whether or not the control timer has expired (S63). If the control timer has not expired (NO in S63), the process proceeds to S23.

  If the control timer has expired (YES in S63), it can be determined that the communication path is blocked due to a failure and is in an unrecoverable state. For this reason, the information conversion control unit 209 erases the data stored in the storage unit 109 and outputs a code indicating key release to the interface conversion control unit 106 (S32). The interface conversion control unit 106 delivers a code indicating key release to the application program.

  Other processes are the same as the data reception process described with reference to FIG. Therefore, detailed description thereof will not be repeated here.

  As described above, the wireless reception device 4 transmits a data retransmission request to the wireless transmission device 3 if it does not receive data for a specified time. If data cannot be received even after waiting for a predetermined time after transmitting the data retransmission request, it is determined that a failure has occurred in the communication path, and the key release data is output to the interface conversion control unit 106. The For this reason, even when the communication path is interrupted and the key release data is not transmitted from the wireless transmission device 3 to the wireless reception device 4, the wireless reception device 4 can cancel the auto-repeat state of the key. .

  In addition, status notification data is appropriately transmitted instead of key data. Since the status notification data does not include a key code, the amount of information is smaller than that of the key data. For this reason, the amount of data flowing on the communication path can be kept to the minimum necessary, and as a result, power consumption can be reduced.

(Embodiment 5)
The wireless information transmission system according to Embodiment 5 of the present invention has the same hardware configuration as the wireless information transmission system according to Embodiment 3 described with reference to FIG. Therefore, detailed description thereof will not be repeated here.

  In the wireless information transmission system according to the fifth embodiment, the wireless transmission device 3 transmits key data in response to the information transmission permission transmitted from the wireless reception device 4.

  The information generation control unit 203 of the wireless transmission device 3 waits for an information transmission permission from the wireless reception device 4 by the wireless signal 212. After receiving the information transmission permission, the information generation control unit 203 transmits the data to be transmitted to the wireless reception device 4 when it is held. The information generation control unit 203 has a function of counting the number of times information transmission permission is received, and can execute a predetermined process when the information generation control unit 203 reaches a certain number.

  The information conversion control unit 209 of the wireless reception device 4 detects the signal received by the reception unit 108, converts the signal into specific format data, and then passes the signal to the interface conversion control unit 106. The information conversion control unit 209 has a function for transmitting information transmission permission to the wireless transmission device 3 via the transmission unit 210. Further, the information conversion control unit 209 has a function of counting the number of times each time an information transmission permission is given, and can execute a process designated in advance when the count value exceeds a specified number.

  With reference to FIG. 12, the data transmission processing by the information generation control unit 203 of the wireless transmission device 3 will be described. The information generation control unit 203 waits for information transmission permission from the wireless reception device 4 and transmits data in response to the timing at which the event occurs.

  The same processes as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof will not be repeated here.

  When an event occurs due to the first pressing of a key (NO in S4), the information generation control unit 203 changes the key status of the key to the on state (S6) and then initializes the counter (S72). ). This counter is used to count the number of times information transmission permission is received from the wireless receiver 4. Thereafter, the information generation control unit 203 generates transmission data (S7). Waiting for information transmission permission from the wireless receiver 4 (S70). When the reception unit 205 receives a wireless signal indicating permission for information transmission (YES in S70), the information generation control unit 203 responds to the information transmission permission and sends the transmission data to the wireless reception device 4 via the transmission unit 104. (S8). Thereafter, the control returns to S3.

  If no key event has occurred and the key status of any key is on (NO in S3, YES in S10), the information generation control unit 203 grants information transmission permission from the wireless receiver 4. It is determined whether or not it has been given (S68). When the information transmission permission is given from the wireless receiver 4 (YES in S68), the information generation control unit 203 increments the counter by one (S69), and determines whether or not the counter value exceeds the specified value. Judgment is made (S71). If the counter value exceeds the specified value (YES in S71), the information generation control unit 203 initializes the counter (S73) and generates transmission data for the key whose key status is on (S7). ), And transmits the data to the wireless receiver 4 (S70, S8).

  If transmission permission is not given (NO in S68), or if the counter value does not exceed the specified value (NO in S71), the control returns to S3.

  By performing the processing as described above, when the key status is in the on state, the key data of the key whose key status is in the on state is transmitted to the wireless reception device 4 every time the information transmission permission is received a specified number of times Sent.

  With reference to FIG. 13, the data reception process by the information conversion control unit 209 of the wireless reception device 4 will be described. The information conversion control unit 209 has a function for granting information transmission permission to the wireless transmission device 3.

  Processes similar to those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof will not be repeated here.

  After the initialization process (S22), the information conversion control unit 209 transmits information transmission permission to the wireless transmission device 3 using the transmission unit 210 (S76). As a result of giving the information transmission permission, it is determined whether or not data is received from the wireless transmission device 3 (S23). If data could not be received from the wireless transmission device 3, but the key status of any key is on (YES in S30), the counter is incremented by one (S74). When this counter exceeds a specified value, key release data is output to the interface conversion control unit 106. However, the specified value of the counter in the wireless receiver 4 is set larger than the specified value of the counter in the wireless transmitter 3.

  When the counter value exceeds the specified value (YES in S75), the information conversion control unit 209 deletes the data stored in the storage unit 109 and outputs key release data to the interface conversion control unit 106 ( S32). In addition, the information conversion control unit 209 changes the key status of the key corresponding to the key release data to the off state (S33).

If the counter value does not exceed the specified value (NO in S75), the control returns to S76.
When the receiving unit 108 receives data from the wireless transmission device 3 or when any code is output to the interface conversion control unit 106 including the key release data, the counter is initialized (S77).

  As described above, the wireless transmission device 3 can achieve transmission data generation and transmission timing based on the count number of information transmission permission from the wireless reception device 4. For this reason, data is not transmitted unnecessarily, which can contribute to the simplification of processing and the reduction of power consumption.

  The wireless reception device 4 may control timing for granting information transmission permission to the wireless transmission device 3 by combining with a timer.

  The wireless transmission device 3 may transmit the status information described in the second and fourth embodiments when the number of receptions of information transmission permission exceeds a specified value or when the same data is transmitted. Good.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure for demonstrating the operation | movement of the information transmission process of this invention. It is a block diagram which shows the structure of the wireless information transmission system which concerns on Embodiment 1 and 2 of this invention. 4 is a flowchart of data transmission processing according to the first embodiment. 3 is a flowchart of data reception processing according to the first embodiment. 10 is a flowchart of data transmission processing according to the second embodiment. 10 is a flowchart of data reception processing according to the second embodiment. It is a block diagram which shows the structure of the wireless information transmission system which concerns on Embodiment 3-5 of this invention. 10 is a flowchart of data transmission processing according to the third embodiment. 10 is a flowchart of data reception processing according to the third embodiment. 10 is a flowchart of data transmission processing according to the fourth embodiment. 10 is a flowchart of data reception processing according to the fourth embodiment. 10 is a flowchart of data transmission processing according to the fifth embodiment. 10 is a flowchart of data reception processing according to the fifth embodiment. It is a figure which shows the flow of the data in the conventional information transmission process. It is a figure for demonstrating the problem of the conventional information transmission process.

Explanation of symbols

  1,3 Wireless transmission device, 2,4 Wireless reception device, 102 input unit, 103,203 information generation control unit, 104,210 transmission unit, 106 interface conversion control unit, 107,209 information conversion control unit, 108,205 reception Part, 109, 204 storage part, 110, 212 wireless signal.

Claims (8)

A wireless transmission device for transmitting information wirelessly;
A wireless reception device that wirelessly receives information transmitted from the wireless transmission device;
The wireless transmitter is
An input means for inputting instructions;
Transmitting device side transmitting means for transmitting information wirelessly to the wireless receiving device;
When the instruction is continuously input from the input unit and connected to the input unit and the transmission unit side transmission unit, the instruction is transmitted at a predetermined interval via the transmission unit side transmission unit. Information generation control means,
A transmitting device side receiving means for receiving information transmitted by radio from the wireless receiving device,
The wireless receiver is
Receiving device side receiving means for receiving an instruction transmitted by radio from the wireless transmitting device;
An operating means connected to the receiving device side receiving means and operating according to an instruction received by the receiving device side receiving means;
Receiving device side transmitting means for transmitting information to the wireless transmitting device by radio,
When the operation means does not receive an instruction from the wireless transmission device for a certain period, it transmits a request for retransmission of the instruction to the wireless transmission device via the reception device-side transmission means,
The information generation control unit retransmits the instruction via the transmission unit when the information generation control unit receives the retransmission request via the transmission device side reception unit. A wireless transmission device for transmitting information wirelessly;
A wireless reception device that wirelessly receives information transmitted from the wireless transmission device;
The wireless transmitter is
An input means for inputting instructions;
Transmitting device side transmitting means for transmitting information wirelessly to the wireless receiving device;
When the instruction is continuously input from the input unit and connected to the input unit and the transmission unit side transmission unit, the instruction is transmitted at a predetermined interval via the transmission unit side transmission unit. Information generation control means,
The wireless receiver is
Receiving device side receiving means for receiving an instruction transmitted by radio from the wireless transmitting device;
Storage means for temporarily storing information received from the wireless transmission device;
An operating means connected to the receiving device side receiving means and operating according to an instruction received by the receiving device side receiving means;
The operation means deletes information temporarily stored in the storage means when an instruction is not transmitted from the wireless transmission device for a predetermined period. The input means includes an input unit that is turned on or off by an external operation,
The transmitting device side transmitting means transmits information for changing the state of the input unit,
When the information that the input unit is on is stored in the storage unit, the operation unit transmits an instruction to turn off the input unit from the wireless transmission device for a predetermined period. 3. The wireless information transmission system according to claim 2, wherein if there is not, an instruction to turn off the input unit is output to the receiving device side receiving unit.   The wireless information transmission system according to claim 3, wherein the input unit is a key. The wireless transmission device further includes transmission device side reception means for receiving information transmitted by radio from the wireless reception device,
The wireless information transmission system according to any one of claims 2 to 4, wherein the wireless reception device further includes a reception device side transmission unit for wirelessly transmitting information to the wireless transmission device. A wireless receiver used in a wireless information transmission system, comprising: a wireless transmitter that transmits information wirelessly; and a wireless receiver that wirelessly receives information transmitted from the wireless transmitter;
Receiving device side receiving means for receiving an instruction transmitted by radio from the wireless transmitting device;
Storage means for temporarily storing information received from the wireless transmission device;
It is connected to the receiving device side receiving means, operates in accordance with the instruction received by the receiving device side receiving means, and is stored in the storage means when no instruction is transmitted from the wireless transmitting device for a predetermined period. And a wireless receiving device including operating means for deleting the information. Further comprising a receiving device-side transmitting means for wirelessly transmitting information to the wireless transmitting device;
The wireless reception device according to claim 6, wherein the operation unit transmits an information transmission permission signal to the wireless transmission device via the reception device side transmission unit every time a predetermined process is completed.   The operation means determines that the instruction from the wireless transmission device is finished when an instruction is not transmitted from the wireless transmission device even though the information transmission permission signal is transmitted a predetermined number of times. The wireless receiver described.

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