JP2010154346A - Electronic device, switching method and program of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control a state of an electronic device so that the electronic device tends to be in a state to be preferentially switched when determining for the first time, when switching between a preferential state and a non preferential state based on determination whether an input value focused by the electronic device is in a predetermined range or not. <P>SOLUTION: A reception level (input value) is determined whether it is in a predetermined range or not. According to the determination, switching is performed between the preferential state (reception state of 12 segment broadcasting) and the non preferential state (for example, reception state of 1 segment broadcasting) by hysteresis controlling. When a first time determination such as power on or television receiver activation, the determination is made based on whether the reception level (input value) is within a threshold L3 (range for the first time) equal to or larger than the upper threshold L1 (a first range) of 12 segment broadcasting or not. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

According to the present invention, the state of the electronic device is based on the determination as to whether or not the input value of interest of the electronic device is within a predetermined range, or the priority state corresponding to the predetermined range or the exclusive relationship with the priority state The present invention relates to an electronic device that switches to a non-priority state, and a switching method and program thereof.

In general, in digital terrestrial television broadcasting, one channel allocated to each broadcasting station is divided into 13 segments, and 12 segments in this divided band are for high-definition and high-quality high-definition broadcasting (12-segment broadcasting with high resolution). The remaining one segment is for mobile devices (for simple low-resolution 1-segment broadcasting). However, the 12-segment broadcasting and the 1-segment broadcasting are resistant to error rates due to differences in data encoding rates. In contrast, since there is a difference in reception performance, it is considered to switch to 1-segment broadcasting when 12-segment broadcasting cannot be satisfactorily received depending on the area or place where the received radio wave is weak. For example, as a mobile digital broadcast receiving apparatus capable of switching between 1-segment broadcasting and 12-segment broadcasting, conventionally, by monitoring the reception status (reception field strength and error rate) of television broadcasting, this reception status can be changed. Accordingly, there is known a technique in which high-quality / low-quality broadcasting is appropriately switched (see Patent Document 1).
JP 2005-244530 A

However, in the above-described prior art, switching to high-quality / low-quality broadcasting is performed according to the reception status of the television broadcast. However, the reception status changes every time due to movement and the like. Switching occurs frequently.
Therefore, it is conceivable to stabilize the reception by switching the 12-segment broadcasting / 1-segment broadcasting by hysteresis control, so that the reception is stabilized. Until reaching the threshold (upward threshold for 12-segment broadcasting) when transitioning to a high state, or until reaching the threshold (downstream threshold for 1-segment broadcasting) when transitioning from a high reception level to a low state During this period, the hysteresis judgment becomes indefinite. In such a case, it may be possible to switch to the reception state of the 1-segment broadcast at the time of the first determination, but the reception level at which the 12-segment broadcast can be satisfactorily viewed at the time of the initial determination, that is, below the uplink threshold. Thus, there is a problem in that switching from 1-segment broadcasting to 12-segment broadcasting is suppressed even when the reception level is equal to or higher than the downlink threshold.

This is not limited to switching between 12-segment broadcasting and 1-segment broadcasting, but when switching the state of an electronic device using hysteresis control, for example, based on ambient environmental changes (temperature, illuminance, etc.). The same problem occurs even when the energy saving function is controlled ON / OFF. That is, based on the determination of whether or not the input value (temperature, illuminance, etc.) of interest of the electronic device is within a predetermined range, the priority state (for example, the energy-saving function is turned on) corresponding to the predetermined range is switched. When switching to a non-priority state that is exclusively related to this priority state (for example, the off state of the energy saving function), as in the case described above, the non-priority state is fixed at the first determination. Therefore, even if the input value has reached a level that can be switched to the priority state, the switching is suppressed.

An object of the present invention is to change the state of an electronic device between a priority state and a non-priority state based on a determination as to whether or not an input value of interest of the electronic device is within a predetermined range. It is to be able to control so that it becomes easy to switch to a desired state.

In order to solve the above-described problem, the invention according to claim 1 corresponds to the predetermined range based on the determination of whether or not the input value of the electronic device is within the predetermined range. An electronic device that switches between a priority state to be performed and a non-priority state that has an exclusive relationship with the priority state, wherein the input value is in a first range corresponding to the priority state. And when the input value is determined to be within the first range by the first determination unit when the state of the electronic device is in the non-priority state, the priority of the state of the electronic device is the priority. A first switching means for switching to a state, a second determination means for determining whether or not the input value is in an initial range that is a range wider than the first range, and the first determination means or the The determination using the second determination means is the first determination. First determination means for determining whether or not the determination is the first determination by the first determination means, and when the input value is determined to be in the initial range by the second determination means And second switching means for switching the state of the electronic device to the priority state.

As an invention dependent on claim 1, when the first determination means determines that the determination is the first time, and the second determination means determines that the input value is not in the initial range, The invention according to claim 2, further comprising third switching means for switching the state of the electronic device to the non-priority state.

According to a first aspect of the present invention, the apparatus further comprises third determination means for determining whether or not the input value is in a second range that is narrower than the exclusive range of the initial range. The invention according to claim 3 may be provided.

As an invention dependent on claim 3, when the state of the electronic device is in the priority state, and the third determination means determines that the input value is in the second range, The invention according to claim 4, further comprising fourth switching means for switching the state to the non-priority state.

The invention according to claim 5, further comprising priority state setting means capable of setting the priority state and the non-priority state by a user operation. Also good.

The invention dependent on claim 1 further comprises receiving means for selectively receiving terrestrial digital broadcasting in segment units, and receiving level detecting means for detecting a receiving level indicating whether the receiving state of the receiving means is good or bad. The input value is a reception level detected by the receiving means, the priority state is a reception state in which the segment unit is a larger unit, and the non-priority state is a unit in which the segment unit is smaller. The invention according to claim 6 is characterized in that the reception state is as follows.

As an invention dependent on claim 1, a receiving means for selectively receiving a terrestrial digital broadcast in segment units, and a battery serving as a power source for receiving the broadcast when receiving the terrestrial digital broadcast by the receiving means A remaining battery level detecting means for detecting the remaining battery level, wherein the input value is the remaining battery level detected by the remaining battery level detecting means, and the priority state is smaller in the segment unit. The invention according to claim 7, wherein the reception state is a unit, and the non-priority state is a reception state in which the segment unit is a larger unit.

The invention according to claim 1 further includes illumination control means for controlling whether or not to illuminate the display unit, and detection means for detecting the illuminance of the surrounding environment, wherein the input value is detected by the detection means. 9. The illumination level according to claim 8, wherein the priority state is a state of suppressing illumination of the display unit, and the non-priority state is a state of illuminating the display unit. It may be an invention.

The invention according to claim 1 further includes illumination control means for controlling whether or not to illuminate the display unit, and detection means for detecting the illuminance of the surrounding environment, wherein the input value is detected by the detection means. 10. The illumination level according to claim 9, wherein the priority state is a state of illuminating the display unit, and the non-priority state is a state of suppressing illumination of the display unit. It may be an invention.

In order to solve the above-described problem, the invention according to claim 10 is characterized in that the state of the electronic device is based on the determination as to whether or not the input value of interest of the electronic device is within the predetermined range. And switching to a non-priority state that has an exclusive relationship with the priority state, and determines whether the input value is in a first range corresponding to the priority state And when the first determination means determines that the input value is in the first range when the state of the electronic device is in the non-priority state, the state of the electronic device is set to the priority state. A step of switching, a step of determining whether or not the input value is in an initial range that is a range wider than the first range, and a determination using the first determination unit or the second determination unit. Whether it is the first decision An electronic device that determines that the determination is an initial determination by the first determination unit, and that the input value is within the initial range by the second determination unit. And a step of switching the state to the priority state.

In order to solve the above-described problem, the invention according to claim 11 is directed to a computer based on the determination of whether or not the input value of the electronic device is within a predetermined range. When switching between a priority state corresponding to the predetermined range or a non-priority state exclusive to the priority state, whether or not the input value is in a first range corresponding to the priority state A function of determining, and a function of switching the state of the electronic device to the priority state when the input value is determined to be in the first range when the state of the electronic device is in the non-priority state; A function for determining whether or not the input value is in an initial range that is wider than the first range; and a determination whether or not the input value is in the first range or the initial range. Whether or not there is an initial determination And a function for switching the state of the electronic device to the priority state when it is determined that the determination is an initial determination and the input value is determined to be in the initial range. It is characterized by a program for realizing.

According to the present invention, when it is determined whether or not the input value is within a predetermined range, it is possible to perform control so that it is likely to be preferentially switched at the time of the initial determination. Control becomes possible.

(Embodiment 1)
The first embodiment of the present invention will be described below with reference to FIGS.
This embodiment exemplifies a case where the present invention is applied to a mobile phone as an electronic device. FIG. 1 is a block diagram showing basic components of the mobile phone.
A mobile phone is provided with a call function, an e-mail function, an Internet connection function (Web access function), a television broadcast reception function, and the like. This TV function is a function for receiving a television broadcast and outputting the broadcast contents. The reception state of a high-resolution digital television broadcast (12-segment broadcast) and a digital television broadcast (1 segment) having a lower resolution than the 12-segment broadcast. (Broadcast) reception status can be switched.

The central control unit 1 operates by supplying power from a power supply unit 2 including a secondary battery, and controls the overall operation of the cellular phone according to various programs in the storage unit 3, a central processing unit, a memory, and the like have. The storage unit 3 stores programs and various applications for realizing the present embodiment in accordance with the operation procedure shown in FIG. 5, and stores various information necessary for them. As will be described later, the setting information storage unit M in the storage unit 3 stores setting information related to switching between the reception state of 12-segment broadcasting and the reception state of 1-segment broadcasting.

The wireless communication unit 4 takes in a signal from the receiving side of the baseband unit and demodulates it into a received baseband signal during operation of the call function, and then outputs a sound from the call speaker SP, and also inputs audio from the call microphone MC. Is encoded into a transmission baseband signal, and is then sent to the transmission side of the baseband unit for transmission from the antenna. The display unit 5 uses a high-definition liquid crystal and displays various information such as character information, a standby image, and a television image. The display unit 5 includes a backlight BL that illuminates the liquid crystal screen. Have. The central control unit 1 controls on / off of the backlight BL according to a detection signal from the illuminance detection unit 6. Note that the ON / OFF control of the backlight BL will be described in a second embodiment described later. The operation unit 7 inputs dial input, character input, command input, and the like. The sound speaker 8 outputs music, TV sound, and the like. The battery detection unit 9 monitors the secondary battery of the power supply unit 2 and detects the remaining battery level.

The TV broadcast receiving unit 10 extracts a broadcast signal of a channel selected in advance from a terrestrial digital TV broadcast signal received by a TV antenna, and performs OFDM (orthogonal frequency division multiplexing) demodulation or multiplexing. The video signal, the audio, and the data (character data) are separated from the broadcast signal that has been converted to be decoded, the compressed data is decompressed, and the like, and has a front end unit 11 and a back end unit 12 It has become. The front end unit 11 selectively receives terrestrial digital broadcasts in segment units. The tuner 13 extracts a broadcast signal of a preselected channel, and the broadcast signal from the tuner 13 is OFDM demodulated. And an OFDM demodulator 14 for obtaining a TS (transport stream) signal in which video and audio are multiplexed.

The back-end unit 12 includes a data separation unit 15, a decoder unit 16, and a display control unit 17. When the data separation unit 14 receives the multiplexed TS signal from the OFDM demodulation unit 14, the TS signal is received. Audio, video, data, and the like are obtained separately, and this video PES (Packetized Elementary Stream) and audio PES are input to the decoder unit 16. The decoder unit 16 includes a video processing unit 16a that processes video PES, an IP conversion unit 16b that performs interlaced / blog progressive conversion, and an audio processing unit 16c that processes audio PES.

The video processing unit 16a decodes the video PES and decompresses the compressed data. The video signal processed by the video processing unit 21a is given to the IP conversion unit 16b to perform interlace / blog progressive conversion. Is called. The blog progressive video signal converted by the IP conversion unit 16b is given to the display control unit 17. The display control unit 17 performs processing such as converting a blog progressive video signal (YUV video signal) from the IP conversion unit 16b into an RGB video signal, and the RGB video signal is displayed on the display unit 5. Given. Further, the audio signal analog-converted by the audio processing unit 16 c is given to the sound speaker 8.

The front end unit 11 and the back end unit 12 can be controlled by the central control unit 1, and the central control unit 1 receives the digital television broadcast reception status (reception electric field strength) from the OFDM demodulation unit 14 of the front end unit 11. Is received, the reception state (reception state of 12-segment broadcasting) in which the segment unit is larger and the reception state (reception state of 1-segment broadcasting) in which the segment unit is smaller are currently received. Switching is made according to the situation.

That is, when the OFDM demodulator 14 gives an AGC signal corresponding to the gain of AGC (Automatic Gain Control) to the central controller 1, the central controller 1 determines the reception level (reception field strength) based on the AGC signal. In the case of detecting and determining whether to switch between the reception state of 12-segment broadcasting and the reception state of 1-segment broadcasting according to this reception level or to maintain the current reception state as it is, The switching signal CH is output and provided to the OFDM demodulator 14. The central control unit 1 performs the switching determination periodically (for example, every second), but the determination timing is arbitrary and may be arbitrarily set by a user operation. In addition, it is not limited to switching between the reception state of 12-segment broadcasting and the reception state of 1-segment broadcasting according to the reception level, and can be arbitrarily switched by a user operation.

Here, if the switching signal CH is a signal for instructing switching to 12-segment broadcasting, the OFDM demodulator 14 OFDM-demodulates only the 12-segment broadcasting signal, and also instructs switching to 1-segment broadcasting. If it is a signal, only a 1-segment broadcast signal is OFDM demodulated and provided as a TS signal to the data separation unit 25 of the back-end unit 12. As a result, the 12-segment broadcast output (viewing) state is switched to the 1-segment broadcast output (viewing) state, and conversely, the 1-segment broadcast viewing state is switched to the 12-segment broadcast viewing state.

FIG. 2 is a diagram illustrating a state where 12-segment broadcasting and 1-segment broadcasting are sequentially switched according to the reception level of digital television broadcasting (in the case of high-quality viewing priority).
Here, in the figure, the vertical axis indicates the reception level and the horizontal axis indicates time. The central control unit 1 uses hysteresis control when switching between 12-segment broadcasting and 1-segment broadcasting according to the current reception level. That is, two different threshold values for switching determination, that is, a threshold value (upward threshold value for 12-segment broadcasting) L1 when the reception level (input value) transitions from a low state to a high state, and conversely, the reception level is high. A threshold value (downward threshold value for 1-segment broadcasting) L2 for transition from a state to a low state is provided, and when the reception level reaches an upstream threshold value L1 for 12-segment broadcasting, switching to 12-segment broadcasting is performed. Thereafter, the 12-segment broadcasting is maintained until the reception level reaches the downlink threshold L2 for the 1-segment broadcasting. When the reception level reaches the threshold L2, the switching to the 1-segment broadcasting is performed.

In this case, in order to invalidate this hysteresis control at the time of the initial determination such as when the television is started, the initial threshold L3 is used as the switching determination threshold without using the upstream threshold L1 for 12-segment broadcasting. . Here, the time of the initial determination is from immediately after the power is turned on until the switching determination timing is reached, and the initial threshold value L3 used at the time of the initial determination is substantially the same as the downlink threshold value L2 for 1-segment broadcasting. It is the same value (slightly large value or slightly small value). The lower threshold L4 for 1-segment broadcasting is a threshold for determining whether 1-segment broadcasting can be received satisfactorily or whether reception is poor (reception failure). Here, at the time of the first determination, if the reception level is equal to or higher than the initial threshold L3 (first range) in order to give priority to the 12-segment broadcasting (high-quality viewing priority), the switching to the 12-segment broadcasting is performed. If it is less than the initial threshold value L2, switching to 1-segment broadcasting is performed.

In this way, since high-quality viewing of 12-segment broadcasting is prioritized for the first determination, the reception status of 12-segment broadcasting is referred to as priority status, and the reception status of 1-segment broadcasting is in an exclusive relationship with the priority status. When referred to as a non-priority state, in order to invalidate the hysteresis control at the time of the initial determination, the priority state and the non-priority state are switched based on the initial threshold value L3, and at the subsequent determination, the hysteresis control is enabled to be 12 segments. Switching between the priority state and the non-priority state is performed depending on whether it is equal to or higher than the uplink threshold L1 for broadcasting (first range) or equal to or less than the downlink threshold L2 for broadcasting 1 segment (second range). Yes. Moreover, since the threshold value for initial L3 or more (first range) is almost the same value as the downlink threshold value L2 for 1-segment broadcasting, it is wider than the upward threshold value L1 for 12-segment broadcasting (first range). It has become. Further, the second range described above is a narrower range than the exclusive range of the initial use range. In addition, the lower limit threshold value L4 or less of 1-segment broadcasting is referred to as a third range, and a reception impossible state (non-priority state) corresponding to the third range is particularly referred to as a second non-priority state.

FIG. 3 is a diagram for explaining the setting information storage unit M.
The setting information storage unit M stores setting information related to switching between 12-segment broadcasting and 1-segment broadcasting. “User setting mode”, “target input value”, “priority state”, “non-priority state” These items are arbitrarily set by a user operation. The “user setting mode” is an operation mode of how to switch between 12-segment broadcasting and 1-segment broadcasting, and “high image quality viewing priority” that prioritizes viewing of 12-segment broadcasting in the first determination as described above. In addition, in this embodiment, “long-time viewing priority” is provided so that long-time viewing can be continued even with the current remaining battery level.

The “high quality viewing priority” mode and the “long viewing priority” mode are arbitrarily selected by a user operation, and the central control unit 1 performs control according to the operation mode selected by the user. I am doing so. Here, “Long viewing priority” takes into account the fact that power consumption increases due to the operation of heavy-duty TV functions, and it is better to prioritize long-time viewing over high-quality viewing with the current battery level. This is an operation mode selected for some reason.

As described above, the “input value of interest”, “priority state”, and “non-priority state” corresponding to “high-quality viewing priority” in the “user setting mode” are “reception of broadcast signals”. “Level”, “priority state” is “seg reception” indicating reception state of 12 broadcasts “12 segment reception”, and “non-priority state” is “1 segment reception” indicating reception state of one broadcast. In addition, “input value of interest”, “priority state”, and “non-priority state” corresponding to “long-time viewing priority” in “user setting mode” have “input value of interest” of “remaining battery”, “ The “priority state” is “1 segment reception”, and the “non-priority state” is “12 segment reception”. Note that, in “high quality viewing priority” and “long time viewing priority”, the contents of the “priority state” and the “non-priority state” may be set in reverse to the illustrated example by a user operation.

FIG. 4 is a diagram illustrating a state in which 12-segment broadcasting and 1-segment broadcasting are sequentially switched according to the remaining battery level (when viewing for a long time is prioritized).
Here, in the figure, the vertical axis indicates the remaining battery level and the horizontal axis indicates time. The remaining battery level may decrease due to the driving of the heavy load circuit, or may increase due to charging of the secondary battery of the power supply unit 2 or a change in temperature. When switching between 1-segment broadcasting and 1-segment broadcasting, switching is performed using hysteresis control as in the case of the reception level of television broadcasting shown in FIG.

Also in the case of “long viewing priority”, when switching between 12-segment broadcasting and 1-segment broadcasting as in the case of “high-quality viewing priority” described above, the upstream threshold L1 for 12-segment broadcasting is set as follows. Hysteresis control is performed using the downlink threshold L2 for 1-segment broadcasting, but at the first determination, the initial threshold L3 is used to disable the hysteresis control and the remaining battery level is If it is less than the threshold for use L3, it is switched to the reception state of 1 segment broadcasting, and if it is equal to or more than the threshold for the first time L3, it is switched to the reception state of 12 segments broadcasting. In this “long-time viewing priority”, the first-time threshold value L3 is set to be almost the same value as the up-threshold value L1 for 12-segment broadcasting.

Next, switching operation between the reception state of 12-segment broadcasting and the reception state of 1-segment broadcasting will be described with reference to the flowchart shown in FIG. Here, each function described in this flowchart is stored in the form of a readable program code, and operations according to the program code are sequentially executed. In addition, the operation according to the above-described program code transmitted via the transmission medium can be sequentially executed. This also applies to other embodiments described later, and in addition to the recording medium, an operation specific to this embodiment can be executed using a program / data supplied externally via a transmission medium. FIG. 5 is a flowchart showing an outline of the operation of the characteristic part of the present embodiment in the overall operation of the mobile phone. When the flow of FIG. 5 is exited, the main flow of the overall operation (not shown) Return to).

FIG. 5 is a flowchart showing a process of switching between a 12-segment broadcast reception state and a 1-segment broadcast reception state that is started in response to a television activation operation instructing activation of the television function (in the case of high-quality viewing priority). It is.
FIG. 5 is a flowchart showing the switching process in the case of “high-quality viewing priority” described above. The switching process in the case of “long-time viewing priority” is the same as that in the case of “high-quality viewing priority”. Since this is basically the same as the switching process, the flowchart is omitted.

First, the central control unit 1 detects the current reception level (reception electric field strength) as an input value based on the AGC signal from the OFDM demodulation unit 14 (step A1), and then detects the detected reception level (input value) and 1 It is compared with the lower limit threshold L4 of the segment broadcasting, and it is checked whether the input value is equal to or lower than the lower limit threshold L4 (third range) (step A2). If the input value is equal to or lower than the lower limit threshold L4 (YES in step A2), it is switched to the unreceivable state (second non-priority state) to teach unreceivable (step A3). In this case, a notification indicating that reception is not possible is performed by displaying an unreceivable error message or outputting a voice. Then, the process returns to step A1, and enters the standby state while repeating the above steps A1 to A3 until the reception level (input value) exceeds the lower limit threshold value L4 of 1-segment broadcasting.

Here, if the input value exceeds or exceeds the lower threshold L4 for 1-segment broadcasting (YES in step A2), it is checked whether it is the first determination time (step A4). Since it is time (YES in step A4), the input value of the detected reception level is compared with the initial threshold value L3, and it is checked whether the input value is equal to or greater than the initial threshold value L3 (initial range) (step A5). . If the input value is equal to or greater than the initial threshold value L3 (YES in step A5), the switching signal CH is output to the OFDM demodulator 14 because it is a reception level at which 12-segment broadcasting can be satisfactorily received. Switching to the segment broadcasting reception state is performed (step A6).

If the input value is not equal to or greater than the initial threshold value L3, that is, if the lower limit threshold value L4 of the 1-segment broadcasting <the input value <the initial threshold value L3 (NO in step A5), the switching signal is sent to the OFDM demodulator 14. CH is output to switch to the 1-segment broadcasting reception state (step A7). Then, while checking whether or not the determination timing (for example, every second) has been reached (step A15), the system waits until the determination timing is reached.
Thus, at the time of the first determination, the hysteresis control is invalidated, and the 12-segment broadcast reception state and the 1-segment broadcast reception state are switched based on the initial threshold L3.

Here, when the determination timing is reached (YES in step A15), the process returns to the above-described step A1, and the current reception level (input value) is detected. Here, if the input value is not equal to or lower than the lower limit threshold value L4 of 1-segment broadcasting (NO in step A2), the process proceeds to step A4. However, in this case, it is not the first determination (NO in step A4). Switch. That is, it is checked whether the input value is equal to or less than the downlink threshold L2 (second range) for 1-segment broadcasting (step A8). Now, if the lower limit threshold value L4 of 1-segment broadcasting is less than the input threshold ≤ downlink threshold value L2 to 1-segment broadcasting (YES in step A8), switching to 1-segment broadcasting or 1-segment broadcasting is continued (step A9).

In other words, when the input value is equal to or lower than the threshold L2 for the 1-segment broadcast in the 12-segment broadcast reception state, the 1-segment broadcast reception state is switched. When the value is equal to or lower than the downward threshold L2, the switching is not performed and the reception state of the 1-segment broadcast is maintained as it is. Then, the process waits until the determination timing is reached (step A15). When the determination timing is reached (YES in step A15), the process returns to the above-described step A1 to detect the current reception level (input value).

If the input value is not equal to or less than the downlink threshold L2 for 1-segment broadcasting (NO in step A8), it is checked whether it is equal to or greater than the uplink threshold L1 for 12-segment broadcasting (first range) (step A10). If the input value is equal to or higher than the up threshold L1 for 12-segment broadcasting (YES in step A10), switching to 12-segment broadcasting or 12-segment broadcasting is continued (step A11). That is, when the reception status of the 1-segment broadcasting is equal to or higher than the up threshold L1 to the 12-segment broadcasting, the 12-segment broadcasting reception state is switched to the 12-segment broadcasting reception state. When it becomes equal to or higher than the up threshold L1, the switching is not performed and the reception state of the 12-segment broadcast is maintained as it is. Then, the process waits until the determination timing is reached (step A15). When the determination timing is reached (YES in step A15), the process returns to the above-described step A1 to detect the current reception level (input value).

If the input value is not less than or equal to the downlink threshold L2 for 1-segment broadcasting (NO in step A8) and not more than the uplink threshold L1 for 12-segment broadcasting (NO in step A10), that is, to 1-segment broadcasting. If the downstream threshold L2 <input value <upstream threshold L1 to 12-segment broadcasting, the process proceeds to step A12 to check whether the current reception state is 1-segment broadcasting. If the reception state is one-segment broadcasting (YES in step A12), the reception state of one-segment broadcasting is continued as it is without switching the reception state (step A13).

If the reception state is 12-segment broadcasting (NO in step A12), the reception state of 12-segment broadcasting is continued as it is without switching the reception state (step A14). Then, the process waits until the determination timing is reached (step A15). When the determination timing is reached (YES in step A15), the process returns to the above-described step A1 to detect the current reception level (input value). Thereafter, the same operation is repeated for each determination timing. When a television end interrupt signal is received in this state, the flow of FIG. 5 ends.

In the above-described case, the switching determination process for “high-quality viewing priority” is shown, but the switching determination process for “long-time viewing priority” is basically the same. That is, the difference is that the remaining battery level is detected as an input value in step A1 of FIG. 5, and the other steps are the same as the flow of FIG. In this case, when switching between 12-segment broadcasting and 1-segment broadcasting, the hysteresis control is performed using the upstream threshold L1 for 12-segment broadcasting and the downward threshold L2 for 1-segment broadcasting. At the time of determination, in order to invalidate the hysteresis control, the initial threshold value L3 is used, and if the remaining battery level is less than the initial threshold value L3, the reception state of 1 seg broadcasting with low power consumption is switched.

As described above, in the first embodiment, it is determined whether or not the input value is within a predetermined range, and a priority state (for example, reception status of 12-segment broadcasting) and a non-priority state (for example, 1 segment) are determined. In the case of switching to the broadcast reception state), at the time of the first determination, the reception level is set to a threshold value for the first segment L3 or more (first range), which is a range wider than the uplink threshold L1 for the 12-segment broadcast (first range). Since it is determined whether or not there is (input value), it is possible to control so as to easily switch to a state in which it is desired to switch preferentially at the time of initial determination, and appropriate control in accordance with the actual situation is possible.

If the input value is not greater than or equal to the initial threshold value L3 (initial range) at the time of the initial determination, it is switched to the non-priority state, so the priority range or the non-priority state is set based on the initial range. Can be switched.

In the priority state, when it is determined that the input value is equal to or lower than the downlink threshold L2 for the 1-segment broadcasting (second range), the priority state is switched to the non-priority state. Can take.

Since the priority state and the non-priority state can be set in the setting information storage unit M by the user operation, the priority state and the non-priority state can be set according to the user's intention.

Since the 12-segment broadcasting and the 1-segment broadcasting are switched according to the current reception level, it can be suitably used when there is an intention to prioritize high-quality viewing using the reception level as an index.

Switching between 12-segment broadcasting and 1-segment broadcasting according to the current battery level can be used suitably when there is an intention to prioritize long-time viewing using the remaining battery level as an index. .

In the first embodiment described above, the initial threshold value L3 used at the time of the initial determination is set to a value (slightly larger value or slightly smaller value) substantially the same as the size of the downstream threshold value L2 for 1-segment broadcasting. The initial threshold value L3 is not limited to this, and may be, for example, an intermediate point between the up threshold value L1 for 12-segment broadcasting and the down threshold value L2 for 1-segment broadcasting.
In the first embodiment described above, the input value is the reception level. However, in addition to this reception level, reception conditions such as an error rate may be considered.

(Embodiment 2)
A second embodiment of the present invention will be described below with reference to FIGS.
In the first embodiment described above, the reception state of 12-segment broadcasting and the reception state of 1-segment broadcasting are switched according to the current reception level. However, in the second embodiment, the display unit 5 ON / OFF of the backlight BL that illuminates the light is controlled in accordance with a detection signal from the illuminance detection unit 6. Here, in both the embodiments, the same or the same names are denoted by the same reference numerals, the description thereof will be omitted, and the following description will focus on the features of the second embodiment. .

The illuminance detection unit 6 shown in FIG. 1 detects the illuminance of the surrounding environment using a photodiode or the like, and the central control unit 1 performs illumination based on the current illuminance level detected by the illuminance detection unit 6. ON / OFF of the backlight BL for use is controlled. In this case, the ON / OFF switching of the backlight BL is performed using hysteresis control as in the first embodiment described above. In this case, at the time of initial determination such as when the power is turned on, the initial threshold is used as the switching determination threshold in order to invalidate the hysteresis control. In addition, since FIG. 1 demonstrated in the above-mentioned 1st Embodiment is the same also in this 2nd Embodiment, the description is abbreviate | omitted.

FIG. 6 is a diagram for explaining the setting information storage unit M in the second embodiment.
The setting information storage unit M stores setting information regarding ON / OFF switching of the illumination backlight BL. The “user setting mode”, “target input value”, “priority state”, “non-priority state” ”And their contents are arbitrarily set by a user operation. The “user setting mode” has “power saving priority” and “easy viewing priority” as operation modes for how to turn on / off the illumination backlight BL.

“Power saving priority” is a mode in which priority is given to turning off the illumination backlight BL at the time of the first determination, and “Easy-to-view priority” is a mode in which priority is given to turning on the illumination backlight BL at the time of the first determination. . This “power saving priority”
These modes and the “viewability priority” mode are arbitrarily selected by a user operation, and the central control unit 1 performs control according to the operation mode selected by the user. In this case, “input value of interest” of “power saving priority” indicates the illuminance level of the surrounding environment, “priority state” indicates OFF of the backlight BL, and “non-priority state” indicates ON of the backlight BL. Further, the “input value of interest” of “priority for visibility” indicates the illuminance level of the surrounding environment, “priority state” indicates ON of the backlight BL, and “non-priority state” indicates OFF of the backlight BL. Note that the contents of the “priority state” and the “non-priority state” may be set by a user operation in the opposite manner to the illustrated example.

FIG. 7 is a diagram illustrating a state in which the illumination backlight BL is switched ON / OFF according to the illuminance level of the surrounding environment in the second embodiment (when power saving is prioritized).
Here, in the figure, the vertical axis indicates the illuminance level, and the horizontal axis indicates time. When the central control unit 1 uses the hysteresis control to switch the illumination backlight BL on / off according to the illuminance level, the two different threshold values, that is, the illuminance level (input value) are used for switching determination. Threshold value L1 for transition from a low state to a high state (upward threshold value for backlight OFF) L1 and conversely, threshold value for transition from a high illuminance level to a low state (downward threshold value for backlight ON) L2 And the backlight BL is turned off when the illuminance level reaches the up threshold L1. Thereafter, the backlight BL is kept off until the illuminance level reaches the down threshold L2, but when the down threshold L2 is reached, the backlight BL is turned on. In this case, in order to invalidate this hysteresis control at the time of initial determination such as when the power is turned on, the initial threshold value L3 is used as the switching determination threshold value without using the upstream threshold value L1 for backlight OFF. . Here, the initial threshold value L3 used at the time of the initial determination is substantially the same value (slightly larger value or slightly smaller value) as the magnitude of the downward threshold value L2 for backlight ON, as in the first embodiment described above. It has become. In the second embodiment, the lower limit threshold L4 shown in the first embodiment described above is not necessary.

FIG. 8 is a diagram illustrating a state in which the illumination backlight BL is switched ON / OFF according to the illuminance level of the surrounding environment (in the case of priority on visibility) in the second embodiment.
Here, in the figure, the vertical axis indicates the illuminance level, and the horizontal axis indicates time. Similarly to the case of “power saving priority” described above, in the case of “priority for visibility”, when switching ON / OFF of the backlight BL for illumination, the threshold value L1 for turning the backlight OFF and the backlight ON are set. In this case, the initial threshold value L3 is used and the illuminance level is less than the initial threshold value L3. For example, the backlight is switched off, and if it is equal to or more than the initial threshold L3, the backlight is switched on. In this “priority for visibility”, the initial threshold value L3 is set to be substantially the same value as the upward threshold value L1 for turning off the backlight.

FIG. 9 is a flowchart showing ON / OFF switching processing (when power saving is prioritized) of the illumination backlight BL that is started when the power is turned on. FIG. 9 is a flowchart showing the switching process in the case of “power saving priority” described above. The switching process in the case of “easy to read priority” is the switching process in the case of “power saving priority”. Since this is basically the same as that, the flowchart thereof is omitted. Further, the ON / OFF switching process of the backlight BL is basically the same as the switching process shown in FIG.
First, the central control unit 1 detects the current illuminance level as an input value based on the detection signal from the illuminance detection unit 6 (step B1), and then checks whether it is the first determination (step B2). Since it is the time of the first determination (YES in step B2), the input value of the detected illuminance level is compared with the initial threshold value L3, and it is checked whether the input value is greater than or equal to the initial threshold value L3 (first range). B3).

If the input value is equal to or greater than the initial threshold value L3 (YES in step B3), the backlight BL is turned off because the surrounding environment is bright (step B4), but the input value is not equal to or greater than the initial threshold value L3 (step B4). In step B3, NO), the backlight BL is turned on (step B5). Then, it is checked whether the determination timing (for example, every second) has been reached (step B13), and a standby state is reached until the determination timing is reached.
As described above, at the time of the initial determination, the hysteresis control is invalidated, and the backlight BL is turned on / off based on the initial threshold value L3.

Here, when the determination timing is reached (YES in step B13), the process returns to the above-described step B1, and after detecting the current illuminance level (input value), the process proceeds to the next step B2. Since there is no (NO in step B2), switching according to hysteresis control is performed. First, it is checked whether the input value is equal to or lower than the down threshold L2 (second range) for turning on the backlight (step B6). If the input value is equal to or lower than the down threshold L2 (YES in step B6), switching to the backlight ON is performed. Alternatively, the backlight ON is continued (step B7).

If the input value is not equal to or lower than the down threshold L2 for turning on the backlight (NO in step B7), it is checked whether the input value is equal to or higher than the up threshold L1 (first range) for turning off the backlight (step B8). If the input value is greater than or equal to the backlight OFF up threshold L1 (YES in step B8), switching to backlight OFF or continuing backlight OFF is continued (step B9).

On the other hand, if the input value is not equal to or lower than the descending threshold value L2 for backlight ON (NO in step B6) and not equal to or greater than the ascending threshold value L1 for backlight OFF (NO in step B8), the process proceeds to step B10. Then, it is checked whether the backlight BL is in the ON state. If it is ON (YES in step B10), the ON state of the backlight BL is continued as it is without switching ON / OFF (step B11). If the backlight BL is in an OFF state (NO in step B10), the backlight BL is kept in the OFF state as it is without switching ON / OFF (step B12).

Then, a standby state is reached until the determination timing is reached (step B13). When the determination timing is reached (YES in step B13), the process returns to step B1 described above to detect the current illuminance level (input value). Thereafter, the same operation is repeated for each determination timing. When a power-off interrupt signal is received in this state, the flow of FIG. 9 ends.
FIG. 9 illustrates the case of “power saving priority”, but the present invention can be similarly applied to the case of “easy-to-view priority” in which the priority state and the non-priority state are reversed.

As described above, in the second embodiment, it is determined whether the illuminance level (input value) is within a predetermined range, and the priority state (backlight OFF) and the non-priority state (backlight ON) are set. , When the first determination is made, there is an illuminance level (input value) above the initial threshold L3 (first range), which is wider than the backlight OFF upward threshold L1 (first range). Therefore, it is possible to perform control so as to easily switch to a priority state at the time of initial determination, and it is possible to perform appropriate control according to the actual situation.

9 illustrates the case of “power saving priority” in which the priority state is the backlight OFF and the non-priority state is the backlight ON. On the contrary, the priority state is the backlight ON, The same applies to “Easy-to-view priority” where the backlight is turned off in the non-priority state, and it can be controlled so that it is likely to be switched preferentially at the time of the first judgment, and it matches the actual situation. Appropriate control becomes possible.

In the second embodiment described above, the initial threshold value L3 used at the time of the initial determination is set to a value (slightly larger value or slightly smaller value) substantially the same as the size of the downstream threshold value L2 for 1-segment broadcasting. The initial threshold value L3 is not limited to this, and may be, for example, an intermediate point between the upward threshold value L1 for backlight OFF and the downward threshold value L2 for backlight ON.

In the second embodiment described above, ON / OFF of the backlight BL is controlled. However, brightness may be controlled in addition to ON / OFF. For example, in the case of “power saving priority”, the luminance is lowered between the up threshold L1 to the backlight OFF and the down threshold L2 to the backlight ON, and the luminance is lower than the down threshold L2 to the backlight ON. You may make it high.

In addition, the present invention is not limited to the broadcast reception switching control and display backlight ON / OFF control described in the above embodiments, and can be applied to, for example, ON / OFF control of automobile headlights and luminance control.
In each of the above-described embodiments, the case where the present invention is applied to a mobile phone has been described. However, the present invention is not limited to a mobile phone, and may be an electronic device such as a personal computer, a PDA, a digital camera, or a music player.

The block diagram which showed the basic component of the mobile telephone applied as an electronic device. The figure which showed a mode that the 12-segment broadcasting and the 1-segment broadcasting were sequentially switched according to the reception level of the digital television broadcasting (in the case of high-quality viewing priority). The figure for demonstrating the setting information storage part. The figure which showed a mode that the 12-segment broadcasting and the 1-segment broadcasting were sequentially switched according to the remaining battery level (when viewing for a long time was given priority). The flowchart which showed the switching process (in the case of high image quality viewing priority) between the reception state of 12-segment broadcasting and the reception state of 1-segment broadcasting, which are executed in response to an activation operation instructing activation of the television function. The figure for demonstrating the setting information storage part M in 2nd Embodiment. In 2nd Embodiment, it is the figure which showed a mode that the illumination backlight BL switches to ON / OFF according to the illuminance level of surrounding environment (when power saving priority is given). In 2nd Embodiment, the figure which showed a mode that the backlight BL for illumination switched to ON / OFF according to the illuminance level of ambient environment (when priority is given to viewability). 9 is a flowchart showing ON / OFF switching processing (when power saving is prioritized) of an illumination backlight BL that is started when the power is turned on in the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Central control part 3 Memory | storage part 5 Display part 6 Illuminance detection part 7 Operation part 8 Sound speaker 9 Battery detection part 10 Television broadcast receiving part 11 Front end part 12 Back end part 13 Tuner 14 OFDM demodulation part 15 Data separation part 16 Decoder part L1 Up-threshold to 12-segment broadcasting / Up-threshold to backlight OFF L2 Down-threshold to 1-segment broadcasting / Down-threshold to backlight ON L3 Initial threshold L4 Lower-limit threshold for 1-segment broadcasting

Claims (11)

Based on the determination of whether or not the input value of interest of the electronic device is within a predetermined range, the priority state corresponding to the predetermined range or a non-priority relationship exclusive to the priority state An electronic device that switches to a state,
First determination means for determining whether or not the input value is in a first priority range corresponding to the priority state;
When the state of the electronic device is in the non-priority state and the input value is determined to be in the first priority range by the first determination unit, the state of the electronic device is switched to the priority state. 1 switching means;
Second determination means for determining whether or not the input value is in a first priority range that is wider than the first priority range;
Initial determination means for determining whether or not the determination using the first determination means or the second determination means is an initial determination;
When it is determined that the determination is an initial determination by the initial determination unit and the input value is determined to be in the first priority range by the second determination unit, the state of the electronic device is changed to the priority state. Second switching means for switching to
An electronic apparatus comprising: When the first determination means determines that the determination is the first time, and the second determination means determines that the input value is not in the first priority range, the state of the electronic device is set to the non-priority. A third switching means for switching to a state;
The electronic apparatus according to claim 1, which is configured as described above. A third determination means for determining whether or not the input value is in a second priority range that is substantially the same range or a narrow range compared to the initial priority range;
The electronic apparatus according to claim 1, which is configured as described above. When the state of the electronic device is in the priority state, and the third determination unit determines that the value of interest is in the second priority range, the state of the electronic device is changed to the non-priority state. A fourth switching means for switching;
The electronic apparatus according to claim 3, wherein the electronic apparatus is configured as described above. A priority state setting unit capable of setting the priority state and the non-priority state by a user operation;
The electronic apparatus according to claim 1, which is configured as described above. Receiving means for selectively receiving digital terrestrial broadcasts by segment;
A reception level detection means for detecting a reception level indicating whether the reception state by the reception means is good or bad;
Further comprising
The input value is a reception level detected by the receiving means;
The priority state is a reception state in which the segment unit is a larger unit,
The non-priority state is a reception state in which the segment unit is a smaller unit.
The electronic apparatus according to claim 1, which is configured as described above. Receiving means for selectively receiving digital terrestrial broadcasts by segment;
When receiving the terrestrial digital broadcast by the receiving means, the remaining battery level detecting means for detecting the remaining battery level as a power source for receiving the broadcast;
Further comprising
The input value is the remaining battery level detected by the remaining battery level detection means,
The priority state is a reception state in which the segment unit is a smaller unit,
The non-priority state is a reception state in which the segment unit is a larger unit.
The electronic device according to claim 1. Illumination control means for controlling whether or not to illuminate the display unit;
Detection means for detecting the illuminance of the surrounding environment;
Further comprising
The input value is an illuminance level detected by the detection means,
The priority state is a state of suppressing illumination of the display unit,
The non-priority state is a state in which the display unit is illuminated.
The electronic device according to claim 1. Illumination control means for controlling whether or not to illuminate the display unit;
Detection means for detecting the illuminance of the surrounding environment;
Further comprising
The input value is an illuminance level detected by the detection means,
The priority state is a state of illuminating the display unit,
The non-priority state is a state of suppressing illumination of the display unit.
The electronic device according to claim 1. Based on the determination of whether or not the input value of interest of the electronic device is within a predetermined range, the priority state corresponding to the predetermined range or a non-priority relationship exclusive to the priority state A switching method for switching to a state,
Determining whether the input value is in a first priority range corresponding to the priority state;
The step of switching the state of the electronic device to the priority state when the input value is determined to be in the first priority range when the state of the electronic device is in the non-priority state. When,
Determining whether the input value is in a first priority range that is wider than the first priority range;
Determining whether the determination using the first determination means or the second determination means is an initial determination;
When it is determined that the determination is an initial determination by the initial determination unit and the input value is determined to be in the first priority range by the second determination unit, the state of the electronic device is changed to the priority state. Step to switch to
The switching method characterized by comprising. Against the computer,
Based on the determination of whether or not the input value of interest of the electronic device is within a predetermined range, the priority state corresponding to the predetermined range or a non-priority relationship exclusive to the priority state A function to determine whether the input value is in a first priority range corresponding to the priority state when switching to a state;
A function of switching the state of the electronic device to the priority state when it is determined that the input value is in the first priority range when the state of the electronic device is in the non-priority state;
A function of determining whether or not the input value is in a first priority range that is wider than the first priority range;
A function of determining whether the determination whether the input value is in the first priority range or whether the input value is in the first priority range is an initial determination;
A function for switching the state of the electronic device to the priority state when it is determined that the determination is an initial determination and the input value is determined to be in the first priority range;
A program to realize

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