JP5758699B2 - Video display device and video display device control method - Google Patents

Description

The present invention relates to a video display device such as a television display device, and more particularly to a video display device having a configuration for controlling video display using a human sensor unit for detecting a person,
And a control method of the video display device .

  In recent years, for example, in a video display device such as a television display device, a human sensor unit for detecting a person is mounted, and the presence sensor unit detects the presence or absence of a viewer near the video display device. By controlling the video display, power saving and usability have been improved.

  For example, Patent Document 1 discloses that when the human sensor unit detects the absence of a viewer, the screen is erased, and when a predetermined time elapses in this state, the sound is also erased to save power.

  Also, in Patent Document 2, playback is paused when the human sensor unit (detection means) detects the absence of a viewer during the playback of content, and playback is resumed when the viewer has returned, for ease of use. Is disclosed.

JP 2006-253981 A Japanese Patent Laid-Open No. 2001-84662

  The video display devices described in Patent Documents 1 and 2 stop a video display or video content reproduction when the presence of a human sensor sensor viewer is detected (hereinafter referred to as a “viewer absent mode”). However, no consideration is given to the case where the human sensor unit fails.

  For example, in the video display device described in the above-mentioned Patent Document 1, when the human sensor unit is used in a state in which the human sensor unit is out of order and a person cannot be detected, the human sensor unit may have a viewer near the video display device. Regardless, the viewer detects that the viewer is absent, and there is a problem that the screen suddenly disappears during viewing or the video is not displayed. In addition, in the video display device described in Patent Document 2, if the human sensor unit is broken and cannot be detected, playback may be paused suddenly during viewing or content may be played back. There is a problem of not. As described above, in the video display device having the viewer absent mode, when the human sensor unit breaks down, there is a possibility that video cannot be viewed, and usability may be greatly impaired.

  The present invention has been made in view of the above-described problems of the prior art, and in a video display device provided with a human sensor unit, to improve usability according to a viewer absent mode using the human sensor unit. A suitable technique is provided.

  The present invention is characterized by the structures described in the claims. More specifically, it is characterized in that a failure of the human sensor unit is determined, and when the failure of the human sensor unit is determined, the transition to the viewer absent mode is prevented.

  In addition, the present invention provides a human output when the frequency of the output signal (detection output) from the human sensor unit provided in the video display device is 0 and a signal is generated based on an operation on the operation unit or remote control of the video display device. It is characterized in that it is determined that the sensory sensor unit has failed.

  According to the configuration of the present invention, it is possible to provide a video display device that is further improved in usability in consideration of a failure of the human sensor unit.

1 is a block diagram of a video display device according to a first embodiment of the present invention. The flowchart which shows the failure diagnosis process of the human sensitive sensor part in 1st Example of this invention. It is a figure which shows an example of the process of an absent mode in a video display apparatus. The flowchart which shows the failure diagnosis process of the human sensitive sensor part in 2nd Example of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same number is attached | subjected to what has the same function or structure among the components which appear, and the duplicate description shall be abbreviate | omitted.

  FIG. 1 is a block diagram illustrating a configuration example of the video display device 100 according to the present embodiment.

  The video display device 100 according to the present embodiment is a television display device for displaying a digital television broadcast signal received by a tuner 107 on a display unit 110 such as a liquid crystal panel, for example. The sensor unit 101 is provided.

  The human sensor unit 101 is provided, for example, on the outer periphery of the video display surface of the display unit 110, and moves forward at a predetermined range on the video display surface side of the display unit 110 (for example, ± 50 ° from the horizontal center of the display unit 110). The range (within 5 m) is set as a detection area, and by detecting a person (viewer) in the detection area, it is detected whether or not a person (viewer) exists in the vicinity of the video display device 100. In this embodiment, a heat source movement detection type sensor is used as the human sensor unit 101 that enables such a detection operation. This heat source movement detection type sensor outputs a signal corresponding to the movement of the human body (heat source) in the detection region. That is, the human sensor unit 101 outputs a large signal waveform when the human body that is the heat source moves, and outputs a signal waveform close to 0 because there is no movement of the heat source when the human body does not exist in the detection region. A signal output from the human sensor unit 101 is input to the CPU 105 which is a control unit. The processing of the CPU 105 based on the output signal from the human sensor unit 101 will be described later.

  The operation unit 102 is provided in the video display device 100 and includes operation buttons such as a power ON / OFF button, a channel switching button, and a volume adjustment button. The operation unit 102 outputs a signal corresponding to the operated operation button to the CPU 105. In this embodiment, the video display device 100 can be remotely operated by a remote controller (not shown) other than the operation unit 102. The remote control reception unit 103 receives a signal (for example, an infrared signal) emitted from the remote control and receives the CPU 105. Output to.

  The memory 106 is used to store programs used by the CPU 105, output signals from the human sensor unit 101 (hereinafter referred to as “sensor values”), and the like. The tuner 107 receives and demodulates a digital television broadcast signal (video content) of a channel selected by operating the operation unit 102 or the remote controller. The broadcast signal (video content) received and demodulated by the tuner 107 is decoded / decompressed by the video processing unit 108 (for example, when a digital television broadcast signal is compressed and encoded by the MPEG2 system, it is decoded / expanded by the MPEG2 system). Processing), image quality correction, pixel number conversion processing (scaling processing) and / or frame rate conversion processing, and are displayed on the display unit 110. At this time, various messages created by the OSD creation unit 109 can be combined with the video content processed by the video processing unit 108 by the combining unit 111 and displayed.

  The recording unit 104 includes, for example, a hard disk, a semiconductor memory, an optical disk, and the like, and records a broadcast signal (video content) received by the tuner 107. The program content recorded in the recording unit 104 is reproduced by a reproduction operation on the operation unit 102 or the remote controller, and is displayed on the display unit 110 after the video processing unit 108 performs the above-described video processing.

  The tuning operation of the tuner 107, the control of the recording unit 104, the OSD creation unit 109 of the video processing unit 108, the video display control to the display unit 110 (power supply control to the display unit 110), the audio output control, etc. This is performed by the CPU 105 according to a predetermined sequence set by an operation on the operation unit 102 or the remote controller, a recording reservation, and / or a detection result of the human sensor unit 101.

  The human sensor unit 101 is a sensor that detects the movement of the heat source as described above, and can detect the presence or absence of the viewer by making the detection region substantially coincide with the viewing region of the display unit 110. it can. By controlling the display unit 110 and the recording unit 104 by the CPU 105 using the detection result of the human sensor unit 101, power consumption can be reduced and usability can be improved. For example, when the human sensor unit 101 detects the absence of the viewer while displaying the video on the display unit 110, the CPU 105 causes the display unit 110 to stop displaying the video, which is useless. It is possible to prevent power consumption. Also, when the program sensor content stored in the recording unit 104 is played back and displayed on the display unit 110, if the presence sensor unit 101 detects the absence of the viewer, the playback is paused, and the viewer When it is detected that the recording has returned, the CPU 105 controls the recording unit 104 so as to resume reproduction, thereby preventing wasteful power consumption and improving usability. Here, the predetermined mode in which the video display is stopped or the reproduction is paused when the viewer is absent is hereinafter referred to as “viewer absent mode” (or absent mode).

  Since the sensor used in the human sensor unit 101 is an electronic component, it is considered that the sensor may break down during use. When the human sensor unit 101 breaks down, there are two cases where the state where the signal waveform is always output continues and the state where the signal waveform is not always output continues. In the case of a failure in which the state where the signal waveform is always output continues, the signal waveform continues to be output even when the viewer is absent, so that the absence of the viewer cannot be detected. However, in this case, even if the viewer is absent, it is not merely shifted to the viewer absent mode, and is not different from a general video display device, so that normal use can be continued. However, in the case of a failure in which the state where the signal waveform is not always output is continued, it is erroneously determined that the viewer is absent despite the presence of the viewer, and the viewer shifts to the viewer absent mode. However, the use of the video display device is hindered, for example, the video is not displayed despite the presence of the video. Conventionally, since the failure of the human sensor unit 101 is not considered, when the human sensor unit 101 fails, the above-described trouble may occur. Therefore, the video display apparatus 100 according to the present embodiment determines or diagnoses the failure of the human sensor unit 101 and prevents the transition to the viewer absent mode when the human sensor unit 101 fails. It is a feature. The characteristics of this embodiment will be described in detail below.

  FIG. 2 is a flowchart illustrating control processing of the video display device based on the failure diagnosis of the human sensor unit 101 and the diagnosis result in the video display device according to the first embodiment, which is executed by the CPU 105. This process is started when the video display device 100 is activated, and each step (hereinafter abbreviated as “S”) in FIG. 2 in this process is executed by the CPU 105.

  First, in S201, the sensor value (output value) from the human sensor unit 101 is read. Next, in S202, the sensor value read in S201 is stored in the memory 106 as a buffer by a fixed amount (for example, 0.1 seconds to several seconds). Next, in S203, the sensor value stored in S202 is read out, and the read sensor value is subjected to Fourier transform to calculate the frequency component of the sensor value.

  Subsequently, in S204 and S205, the data converted into frequency components in S203 is determined. First, in S204, it is determined whether the frequency is 0 (no sensor output). If the frequency is not 0, the process proceeds to S205, and if the frequency is 0, the process proceeds to S206. If the frequency is not 0, it is determined in S205 whether the frequency is an abnormal frequency. The abnormal frequency is determined based on whether or not a high frequency component exists in the frequency component of the sensor value above a predetermined value. The predetermined value here is set to a value larger than the frequency that cannot be realized by normal human body movement. That is, when there is a high frequency component that cannot be realized by normal human movement, the human sensor unit 101 is out of order. Therefore, if it is determined in S205 that the frequency is abnormal, the process proceeds to S207, and it is determined that the human sensor unit 101 is out of order.

  When an abnormal frequency is not recognized in S205, the sensor value output from the human sensor unit 101 is considered to be output due to the movement of the viewer, and thus is determined to be normal and returns to S201.

  On the other hand, if the frequency component is recognized as 0 in S204, it is confirmed in S206 whether there has been an operation by the viewer (user), that is, whether an operation has been accepted. Here, the operation acceptance indicates that the CPU 105 has received a signal generated by an operation on a button of the operation unit 102 or a remote control signal from the remote control receiving unit 103. When the operation is accepted in S206, it means that there is an input from the operation unit 102 or the remote control receiving unit 103, and that there is a person (viewer) who is operating in the vicinity of the video display device 100. It is. That is, when the sensor value frequency is 0 and an operation is accepted, the human sensor unit 101 cannot detect a viewer in the vicinity of the video display device 100, that is, the human sensor unit 101 is out of order. That is. Therefore, when it is determined in S206 that there is an operation reception (Yes), the process proceeds to S207, and it is determined that the human sensor unit 101 is out of order. In step S208, the OSD creation unit 109 creates a message indicating that the human sensor unit 101 has failed, and causes the display unit 110 to display the message. Subsequently, the process proceeds to S209, and thereafter, the detection of the sensor output of the human sensor unit 101 is stopped, and this process ends. Therefore, when the CPU 105 determines that the human sensor unit 101 has failed, the CPU 105 does not perform the processing subsequent to S201 and does not perform any other processing using the human sensor unit 101. That is, in this embodiment, the CPU 105 performs control so as to prevent the transition to the viewer absent mode when a failure of the human sensor unit 101 occurs.

  If no operation is accepted in S206 (No), it is determined that the human sensor unit 101 is operating normally (no failure), and the process proceeds to S210 for a predetermined time (for example, about 10 seconds). It is determined whether or not it is continuous. If it is less than the predetermined time, the process returns to S201. That is, when the frequency of the sensor value of the human sensor unit 101 is 0 and no operation is accepted, S201, S202, S203, S204, S206, and S210 are repeated. If it is determined in S210 that no operation has been accepted for a predetermined time or longer, it can be determined that the viewer is absent, and the process proceeds to S211 to shift to the viewer absent mode.

  After the transition to the viewer absent mode, the sensor value is read from the human sensor unit 101 again in S212. The read sensor value is stored as a buffer in the memory 106 in S213. Next, in S214, the sensor value stored in S213 is read out and Fourier-transformed to calculate the frequency component of the sensor value. S212, S213, and S214 are the same operations as S201, S202, and S203.

  In step S215, it is determined whether the frequency calculated in step S214 is zero. If it is 0 (Yes), the viewer remains absent, and the process returns to S212. Thereafter, S212, S213, S214, and S215 are repeated. If it is determined in S215 that the frequency component is not 0 (No), it means that the viewer has returned, so the absence mode is canceled in S216, and the process returns to the first S201 of this processing.

  The channel, volume, etc. at the time of starting the video display device 100 are in the same state as at the previous end. For this reason, most viewers perform operations such as channel change and volume change after starting the video display device 100. Since this processing is started simultaneously with the start of the video display device 100, even in the case of a failure in which the sensor value of the human sensor unit 101 has a frequency of 0, operations such as channel change and volume change of the viewer immediately after start-up are performed. Sometimes, it can be detected that the human sensor 101 is out of order, and the viewer does not enter the absence mode despite the presence of the viewer.

  In the above description, the message regarding the failure is displayed on the display unit 110 in S208, but the present invention is not limited to this. When the CPU 105 determines that the human sensor unit 101 has failed, the CPU 105 may control lighting of a light emitting unit such as an LED provided around the display unit 110, for example. For example, when the human sensor unit 101 fails, the LED may blink. Further, the step of S208 may be omitted. The function of detecting the absence of the viewer by the human sensor unit 101 and causing the video display device to shift to the absent mode is a function for reducing wasteful power consumption, and the human sensor unit 101 fails. Even if it does not shift to the absence mode even if it does not notify the failure of the human sensor unit 101 to the viewer, there is no problem in normal use.

  Further, whether or not to perform the process of shifting to the viewer absent mode (hereinafter referred to as “viewer absent operation”) by the human sensor unit 101 can be selected by the viewer in the initial setting stage of the video display device 100 or the like. You may do it. This selection is performed by a menu screen created by the OSD creation unit 109, for example. In this case, if it is determined in the process of FIG. 2 that the human sensor unit 101 has failed, the absence of the viewer cannot be selected, and the brightness of the item for selecting the power saving operation on the menu screen May be displayed dark.

  Furthermore, the failure determination result in S207 can be recorded in the recording unit 104, and the date and time when there is a suspicion of failure can be presented by the OSD creation unit 109, whereby the occurrence time when the failure is detected is recorded in the recording unit The data can be recorded at 104, which can be used for after-sales service and failure cause identification.

  FIG. 3 is a diagram illustrating an example of processing in the viewer absent mode in the video display apparatus 100 according to the present embodiment. When shifting to the viewer absent mode, the video display device 100 stops outputting video in S301 and stops outputting audio in S302. Further, in S303, the process shifts to the standby mode and the process is terminated. Here, the standby mode is to suppress useless power consumption by turning on the portion related to the human sensor unit 101 and turning off the power of the portion not related to the human sensor unit 101. S301, S302, and S303 may be performed in a short time, or a predetermined time (for example, about 5 to 10 seconds) may be provided between the steps. Note that this processing is performed in the video display device 100 in parallel with the processing in S212 to S215 when the absence mode is entered in S211 in FIG. Further, this process is an example of the process in the absence of viewer mode, and the present invention is not limited to this. When the video content recorded in the recording unit 104 is being played back, the playback is paused. Also good.

  As described above, according to the present embodiment, in the video display device configured to detect the absence of the viewer by the human sensor unit and shift to the viewer absent mode, the video content is displayed by the viewer due to the failure of the human sensor unit. It is possible to prevent the shift to the absence mode during viewing. Therefore, the usability of the video display device using the human sensor unit can be greatly improved.

  In the processing method of the first embodiment, when the motion sensor unit 101 fails during the absence of viewer mode (a failure in which a signal waveform is not always output), the absence of viewer mode may not be canceled. . In order to prevent this, in the second embodiment, S401 for determining whether or not to accept an operation is provided after it is determined Yes in S215 of the flowchart of FIG.

  That is, if it is determined in S215 that the frequency of the sensor value from the human sensor unit 101 is 0, the process proceeds to S401, and it is determined in S401 whether or not an operation has been accepted between S212 and S215. If no operation has been accepted (No), the process returns to S212. On the other hand, if an operation has been accepted (Yes), the process proceeds to S402, the viewer absent mode is canceled, and the process proceeds to S207 to determine whether the human sensor unit 101 has failed. To do. Since other processes are the same as those described with reference to FIG.

With this configuration, even when the presence sensor unit 101 breaks down during the absence of viewer mode, if the operation is accepted by a remote controller or the like, the absence of viewer mode is canceled and the failure of the presence sensor unit 101 is determined. Can do. In this embodiment, if an operation is accepted in S401, the process proceeds to S402, the absence of viewer mode is canceled and the failure of the human sensor unit 101 is determined. If an operation is accepted in S401, the process proceeds to S216. Here, the viewer absence mode may be canceled. In this case, S201~S204, S206, S21 fault motion sensor unit 101 proceeds to S207 when there again the operation acceptance is to be determined in the 0 the loop.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the Example mentioned above, A various change and deformation | transformation can be accept | permitted. For example, S201 to S204 from the power ON of the image display apparatus, S206, S21 if the operation in the 0 the loop receptionist also did one time may not proceed to S211. With this configuration, even when the motion sensor unit 101 is out of order, even when the viewer has never operated the remote control or the like after the video display device 100 has been activated, It is possible to prevent transition to the absence mode during viewing.

DESCRIPTION OF SYMBOLS 100 Image display apparatus 101 Human sensor part 102 Operation part 103 Remote control receiving part 104 Recording part 105 CPU
106 Memory 107 Tuner 108 Video Processing Unit 109 OSD Creation Unit 110 Display Unit

Claims (8)

In the video display device,
A human sensor unit for detecting the presence or absence of the viewer, and a predetermined unit for stopping the video display device from displaying or reproducing the video when the human sensor detects the absence of the viewer A control unit that controls to shift to the mode,
In the case where the presence of the viewer is detected by the human sensor unit and a signal generated by the operation of the viewer is input to the control unit within a predetermined time after the video display device is activated. And determining that the human sensor section has failed and not shifting to the predetermined mode.   2. The video display device according to claim 1, wherein when the control unit determines that the human sensor unit has failed, the control unit displays a message indicating the failure on the screen.   The video display device according to claim 1, further comprising a light emitting unit, wherein the control unit controls lighting of the light emitting unit when it is determined that the human sensor unit has failed. Display device.   The video display device according to claim 1, further comprising a memory in which a failure history of the human sensor unit is stored.   2. The video display device according to claim 1, wherein it is possible to select whether or not to perform an operation for shifting to a predetermined mode by the human sensor unit, and when it is determined that the human sensor unit has failed, the predetermined sensor unit is selected. A video display device characterized in that selection to perform an operation for shifting to a mode is disabled.   2. The video display device according to claim 1, wherein after the transition to the predetermined mode, absence of a viewer is detected by the human sensor unit and a signal generated by a viewer operation is input to the control unit. The image display device is characterized in that the predetermined mode is canceled and the human sensor unit is determined to have failed. In the video display device,
A human sensor unit for detecting the presence or absence of a listener, and a predetermined mode for stopping the video display device from displaying or reproducing video when the human sensor detects the absence of the viewer And a control unit that controls to shift to
When the presence of a viewer is detected by the human sensor unit when the video display device is activated, the control unit determines that the human sensor unit has failed and does not shift to the predetermined mode. A video display device characterized in that A control method for a video display device configured to shift to a predetermined mode for stopping video display or playback when a human sensor unit for detecting a person detects the absence of a viewer. ,
When the presence of the viewer is detected by the human sensor unit and a signal generated by the operation of the viewer is input within a predetermined time after the start of the video display device, the human sensor unit has failed. The method for controlling the video display device is characterized in that the transition to the predetermined mode is not performed.

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