Elevator apparatus and content broadcast control method for elevator apparatus

Abstract

To provide an elevator apparatus that is able to improve the simultaneity of the broadcast of content, even in a plurality of display devices of different systems installed in a car.SOLUTION: An elevator apparatus includes content control means 22 for controlling simultaneously broadcasting the same content from a first display device 16 and a second display device 17. The content control means 22 includes: delay time estimation means 38, 39 that obtain a delay time from a difference between an elapsed time until a test sound is emitted from a first speaker unit 37 on the basis of a test sound emission signal and an elapsed time until a test sound is emitted from a second speaker unit 32 on the basis of the test sound emission signal; and delay correction means 34, 35 that, on the basis of the delay time obtained by the delay time estimation means 38, 39, delays announcing a broadcast start time of the content on the first display device 16 or the second display device 17 the elapsed time of which is shorter than that of the other.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an elevator system installed in a building, and more particularly to an elevator system equipped with a plurality of display devices for broadcasting content consisting of video and audio within a car, and a content broadcast control method for an elevator system. [Background technology]

[0002] Recently, with the expansion of digital signage, elevator cars are also being equipped with display units that broadcast content, etc. Here, content refers to information such as text, audio, and video provided by the display unit, and broadcasting refers to sending information such as text, audio, and video to many people.

[0003] When broadcasting such content, synchronization of the video information and audio information is important. For example, Patent Publication No. 2009-10548 (Patent Document 1) discloses a video / audio information editing device that solves the problem of time lags occurring in the display when multiple pieces of video / audio information recorded with different models of video cameras are simultaneously played back.

[0004] This video / audio information editing device performs decoding processing on at least two types of video / audio information, extracts time information, decoded audio information, and decoded audio level information for each piece of video / audio information, extracts the time difference between each piece of decoded audio information by comparing the patterns of the decoded audio level information, and generates video / audio information with corrected time information based on this time difference, thereby achieving a time-synchronized display. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-10548 Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, when an elevator device is provided with multiple display units, for example, two, to broadcast the same content, one may use a liquid crystal display unit of a normal system (for example, VGA system) that uses video / audio information as is, and the other may use a liquid crystal display unit of an HDMI (registered trademark) system that digitally converts the video / audio information before sending it. In this case, the HDMI system requires a conversion processing unit so that the received video / audio information can be HDMI converted and displayed on the liquid crystal display unit.

[0007] Therefore, in contrast to a normal LCD display device that uses video / audio information directly, an HDMI LCD display device converts video / audio information to HDMI and uses it, and a difference in transmission speed occurs due to the delay in video / audio information conversion, resulting in a time difference in the broadcast of content between the two display devices.As a result, passengers in the car feel uncomfortable because the content is broadcast with a time difference, even though it is the same content.

[0008] Thus, there is a need for a solution to the delay in broadcasting content caused by differences in transmission speeds that occur when multiple display devices use different transmission methods.

[0009] An object of the present invention is to provide an elevator device and a content broadcast control method for an elevator device that can increase the simultaneity of content broadcast even when multiple display devices using different transmission methods are installed inside the elevator car. [Means for solving the problem]

[0010] The present invention relates to an elevator system that is arranged in an elevator shaft of a building and includes a car that has at least a first display device having a first display unit and a first speaker unit, and a second display device having a second display unit and a second speaker unit, and a content control means that simultaneously broadcasts the same content or mutually related content from the first display device and the second display device, wherein the content control means is characterized by including a delay time estimation means that calculates a delay time from the difference between the elapsed time until a test sound is sounded from the first speaker unit based on a test sound sounding signal and the elapsed time until a test sound is sounded from the second speaker unit based on the test sound sounding signal, and a delay correction means that, when broadcasting the content, delays the broadcast start time of the content from the first display device or the second display device with the shorter elapsed time based on the delay time calculated by the delay time estimation means and then broadcasts the content.

[0011] The present invention also provides a content broadcasting control method for an elevator device that includes a content control means for simultaneously broadcasting the same content or mutually related content from a first display device having a first display unit and a first speaker unit, and a second display device having a second display unit and a second speaker unit, both of which are provided in a car arranged in an elevator shaft of a building, wherein the content control means executes an elapsed time measurement process for measuring the elapsed time until a test sound is sounded from the first speaker unit based on a test sound sounding signal, and the elapsed time until the test sound is sounded from the second speaker unit based on the test sound sounding signal; a delay time estimation process for calculating a delay time from the difference between the elapsed time on the first display device and the elapsed time on the second display device; and a delay correction process for delaying the broadcast start time of the content on the first display device or the second display device with the shorter elapsed time based on the delay time when broadcasting the content, and then broadcasting the content. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide an elevator device and a content broadcasting control method that can increase the simultaneity of content broadcasting even when multiple display devices using different transmission methods are installed inside the elevator car. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram showing the configuration of an elevator device. [Figure 2] FIG. 10 is an explanatory diagram illustrating delays in broadcast start times in conventional display devices A and B. [Figure 3] FIG. 2 is a block diagram showing control blocks of display devices A and B in a car-side control unit according to an embodiment of the present invention. [Figure 4] 1 is an explanatory diagram illustrating a measurement method for measuring a delay time due to a transmission delay according to an embodiment of the present invention. [Figure 5] FIG. 10 is an explanatory diagram illustrating the calibrated broadcast start times on display device A and display device B. [Figure 6] 4 is a flowchart showing a control flow chart when the functions of the control blocks in FIG. 3 are executed by a microcomputer. [Figure 7] FIG. 7 is an explanatory diagram illustrating conditions for determining a calibration setting mode in the control step of FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiment, and various modifications and application examples within the technical concept of the present invention are also included within its scope.

[0015] First, the configuration of an elevator system to which the present invention is applied will be described. Fig. 1 shows the configuration of an elevator system according to an embodiment of the present invention.

[0016] As shown in Figure 1, the elevator system includes a car 10 that ascends and descends through the building's elevator shaft to transport passengers to the nearest floor, a hoist 11 that moves the car 10, a main rope 12 that is wound around the sheave of the hoist 11 and suspends the car 10, a car control unit 13 that performs overall control of the multiple cars 10 in the building, a car-side control unit 14 that is mounted on the ceiling of the car 10 and is capable of communicating with the car control unit 13, and a hall button 15 that is installed in the building's landing hall and that indicates the destination floor or hall call.

[0017] Also provided inside the car 10 are a display device A16, a display device B17, an intercom unit 18, and a car button 19 for indicating the destination floor and opening and closing the car door. The display device A16 is equipped with a display unit and a speaker unit, and similarly the display device B17 is equipped with a display unit and a speaker unit.

[0018] The display unit and speaker unit broadcast content consisting of video information and audio information. The speaker unit can also notify passengers in the car 10 of audio information sent from the management center.

[0019] Display device A16 is a normal-type liquid crystal display device that transmits and uses video / audio information as is, and display device B17 is an HDMI-type liquid crystal display device that digitally converts video / audio information (hereinafter referred to as HDMI conversion) and transmits it. It is assumed that display device A16 and display device B17 synchronously broadcast the same content or mutually related (linked) content. In the following explanation, for ease of understanding, a case where the same content is broadcast simultaneously in terms of time will be described as an example.

[0020] The interphone unit 18 inputs voices and sounds from inside the elevator car, and inputs inquiries from passengers and test sounds from inside the elevator car 10 as in the embodiment described below.

[0021] As mentioned above, in such an elevator device, when two display units are installed in the elevator device to broadcast the same content, one may be a normal type liquid crystal display device A16 and the other may be an HDMI type liquid crystal display device B17.

[0022] In this case, the HDMI system requires a conversion processing unit that converts the received video / audio information so that it can be sent via an HDMI cable, and then converts the information sent via the HDMI cable so that it can be displayed on a liquid crystal display device. As a result, a transmission delay occurs due to the conversion processing unit before the video / audio information is displayed on the liquid crystal display device.

[0023] 2, when the same scene of the same content is broadcast, the broadcast start time TBt of the content broadcast on display device B17 is delayed by a delay time Δt due to transmission delay from the broadcast start time TAt of the content broadcast on display device A16. For this reason, passengers watching the broadcast of this content will feel uncomfortable due to the existence of the delay time Δt.

[0024] Therefore, in an embodiment of the present invention, a configuration is proposed in which the broadcast start time of the content on display device A16 is delayed by a delay time Δt to match the broadcast start time of the content on display device B17, which causes a transmission delay, thereby improving the simultaneity of the broadcast of the content on display device A16 and display device B17.

[0025] Next, an embodiment of the present invention will be described in detail with reference to Figs. 3 to 7. Fig. 3 shows the control blocks of the display device A16 and the display device B17 in the car-side control unit 14 of this embodiment. Fig. 4 shows a measurement method for measuring delay time due to transmission delay. Fig. 5 shows the broadcast start times of calibrated content on the display device A16 and the display device B17. Fig. 6 shows a control flowchart when the functions of the control blocks are executed by a microcomputer. Fig. 7 shows conditions for determining the calibration setting mode in the control flowchart of Fig. 6.

[0026] 3, the car-side control unit 14 is equipped with a communication control unit 20 that communicates with the car control unit 13, and is connected to an interphone control unit 21 and an interphone unit 18. Voice input from the interphone unit 18 is sent to the car control unit 13 via the interphone control unit 21 and communication control unit 20, and then to the management center, allowing a conversation between an observer at the management center and passengers via voice. A test sound, which will be described later, is also picked up by the interphone unit 18 (meaning that the test sound is detected), and sent to the content control unit 22 via the interphone control unit 21 and communication control unit 20.

[0027] The content control unit 22 is provided with an overall processing unit 23 that is responsible for overall control for broadcasting the content, and this overall processing unit 23 determines the content to be broadcast, broadcast time, etc., and the content is broadcast on display device A16 and display device B17.

[0028] For this reason, the overall control unit 23 is connected to an audio / video data storage unit 24, which stores information about the content. Therefore, the overall control unit 23 can obtain information (audio / video information) about the content to be broadcast from the audio / video data storage unit 24. The following description will mainly focus on the delay of the delay time Δt.

[0029] The content control unit 22 includes an image processing unit A25 that processes video information and an audio processing unit A26 that processes audio information related to content broadcast on the display device A16. Similarly, the content control unit 22 includes an image processing unit B27 that processes video information and an audio processing unit B28 that processes audio information related to content broadcast on the display device B17.

[0030] Here, an image processing unit B27 that processes video information and an audio processing unit B28 that processes audio information are connected to an HDMI conversion unit 29, and are converted into an HDMI signal by a conversion processing unit 30. This converted HDMI signal is input to the display device B17 via an HDMI cable.

[0031] The display device B17 is equipped with a conversion unit 33 that converts the HDMI signal into video information and audio information, and inputs the video information to a display unit B31 (e.g., a liquid crystal display unit), and inputs the audio information to a speaker unit B32. Here, the HDMI-type display device B17 is generally known, so further explanation will be omitted.

[0032] Next, a characteristic configuration of this embodiment will be described. The image processing unit A25 is connected to the image delay correction unit 34 and has a function of delaying the video information sent from the image processing unit A25 by a delay time Δt. Similarly, the audio processing unit A26 is connected to the audio delay correction unit 35 and has a function of delaying the audio information sent from the audio processing unit A25 by a delay time Δt.

[0033] The image delay correction unit 34 then inputs the delayed video information to a display unit A36 (e.g., a liquid crystal display unit), and the audio delay correction unit 35 inputs the delayed audio information to a speaker unit A37. The delay time Δt used in the image delay correction unit 34 and audio delay correction unit 35 is determined by a sound analysis unit 38, a calibration unit 39, and a calibration setting mode storage unit 40.

[0034] Next, the sound analysis unit 38, the calibration unit 39, and the calibration setting mode storage unit 40 will be described.

[0035] The calibration setting mode storage unit 40 sets the conditions for finding the delay time Δt, and for example, can operate the calibration function (the function to find the delay time Δt) in response to a switching signal from a maintenance switch when performing maintenance inspection, or can operate the calibration function (the function to find the delay time Δt) in response to a detection signal that detects that there are no passengers in the car.

[0036] In addition, the calibration function (function for determining the delay time Δt) can also be operated when updating the display devices 16 and 17. Therefore, the calibration function (function for determining the delay time Δt) can be operated whenever necessary.

[0037] When the calibration function (the function for calculating the delay time Δt) is operated, the overall processing unit 23 instructs the audio processing unit A26 and the audio processing unit B28 to emit test sounds based on information from the calibration setting mode storage unit 40. This instruction causes the test sounds to be emitted from the speaker units A37 and B32. Therefore, the time it takes for these test sounds to be emitted includes a transmission delay in the display devices A16 and B17.

[0038] When the test sound is played, the test sound is picked up by the interphone unit 18 and input to the sound analysis unit 38. The sound analysis unit 38 determines the maximum amplitude of the picked up test sound and calculates the elapsed time from the time when the blow-out signal commanding the play of the test sound is generated to the time when the maximum amplitude is generated. Once the respective elapsed times are calculated, they are input to the calibration unit 38.

[0039] In the embodiment, the maximum amplitude of the test sound is used, but the peak frequency of the frequency spectrum of the collected test sound can be obtained by Fourier transform, and the elapsed time can be calculated from the blowing signal that instructs the test sound to be blown to the time when the peak frequency is detected. Note that the method for calculating the elapsed time is not limited to these, and it goes without saying that the elapsed time can be calculated by other methods.

[0040] The calibration unit 39 calculates the delay time Δt from the difference (TBtim-TAtim) between the elapsed time TAtim (see Figure 4) at the speaker unit A16 and the elapsed time TBtim (see Figure 4) at the speaker unit B17, and provides this delay time Δt to the image delay correction unit 34 and the audio delay correction unit 35 when the content is broadcast.

[0041] In this way, a delay time estimation means is provided that calculates the delay time from the difference between the elapsed time until the test sound is played from speaker unit A37 based on the test sound playing signal and the elapsed time until the test sound is played from speaker unit B32 based on the test sound playing signal.

[0042] The image delay correction unit 34 and the audio delay correction unit 35 delay the video information and audio information from the image processing unit A25 and the audio processing unit A26 by a time corresponding to the delay time Δt and output them to the display device A16. In this case, the start time of the content broadcast is delayed. In this way, a delay correction means is provided that delays the broadcast start time of the content on the display device A16 or the display device B17, whichever has had the shorter elapsed time, based on the delay time calculated by the delay time estimation means and then broadcasts the content.

[0043] This provides the effect of suppressing delays in broadcasting the content on the display devices A16 and B17, and preventing passengers from feeling uncomfortable with the broadcast of the content.

[0044] Next, a method for measuring the delay time Δt will be described. Figure 4 shows the state from the time when the overall processing unit 23 issues an instruction to play a test sound until the maximum amplitude of the test sound is measured. In this case, since no content is broadcast, the audio delay correction unit 35 is not functioning.

[0045] Now, at time "t0", a blown test sound signal TsA is given to the audio processing unit A26. This blown test sound signal TsA is input to the speaker unit A37, which blows the test sound. The test sound is picked up by the interphone unit 18 and input to the sound analysis unit 38, which determines the time "t1" when the picked up test sound TA has maximum amplitude. Then, the elapsed time "TAtim" from time "t0" to time "t1" is determined.

[0046] Following this, at time "t2", a test sound playing signal TsB is provided to the audio processing unit B28. This playing signal TsB is input to the speaker unit B32, which plays the test sound. The test sound is picked up by the intercom unit 18 and input to the sound analysis unit 38, which determines the time "t3" at which the picked up test sound TB has a maximum amplitude. Then, the elapsed time "TBtim" from time "t2" to time "t3" is determined. This elapsed time "TBtim" includes a transmission delay due to the conversion processing in the HDMI conversion processing unit 30 and the HDMI conversion processing unit 33 of the display device B17.

[0047] In this way, the elapsed time "TAtim" and the elapsed time "TBtim" indirectly indicate the elapsed time until the test sound is played from the first speaker unit 37 based on the test sound playing signal, and the elapsed time until the test sound is played from the second speaker unit 32 based on the test sound playing signal (including the time from playing to sound collection).

[0048] Therefore, by calculating the delay time Δt, which is the difference (TBtim-TAtim) between the elapsed time "TAtim" for speaker unit A16 and the elapsed time "TBtim" for speaker unit B17, and delaying the start time of the broadcast of the content on display device A16 by this delay time Δt, the broadcast of the content by display device A16 and display device B17 can be synchronized.

[0049] The test sound may be sounded not in the audible band but in a high frequency band or a low frequency band that cannot be heard by passengers (humans), which has the effect of allowing the test sound to be sounded at any time.

[0050] This state is shown in Figure 5. When broadcasting the same content, the broadcast start time of the content is delayed by a delay time Δt relative to the broadcast start time TAt broadcast on display device A16. As a result, the broadcast start time of the content on display device A16 is approximately the same as the broadcast start time TBt, which also approximately coincides with the broadcast start time TBt of the content on display device B17.

[0051] In this way, by delaying the broadcast start time of display device A16, which has a small transmission delay (short elapsed time), by the delay time Δt to match the broadcast start time TBt of display device B17, which has a large transmission delay (long elapsed time), passengers watching the content broadcast can watch the same content at the same time. Therefore, the discomfort caused by the delay time Δt, which was a conventional problem, can be resolved.

[0052] Next, a control flowchart will be described for the case where the functions of the control blocks shown in Fig. 3 are executed by a microcomputer. The following control flow causes the overall processing unit 23 to execute the functions of the control blocks shown in Fig. 3. This control flowchart is also activated periodically at predetermined time intervals.

[0053] <Step S10> In step S10, it is determined whether the current operating state of the elevator device is in the calibration setting mode or the normal operating mode. This determination is made based on the state of a flag indicating the operating state.

[0054] For example, as shown in FIG. 7, in the normal operation mode, the flag is set to "0", and in the calibration setting mode, the flag is set to "1". The flag "1" is set, for example, in response to switching of the maintenance switch when performing maintenance inspection. It is also set when it is detected that there are no passengers in the car. Therefore, if the flag is "1" (Yes judgment), the process proceeds to step S11, and if the flag is "0" (No judgment), the process proceeds to step S18.

[0055] <Step S11> Since it is determined in step S10 that the calibration setting mode is in effect, in step S11, a test sound signal is output at a predetermined time t0 (see FIG. 4). This test sound is used to test the transmission delay of the display device A16. In response to this test sound signal, the test sound is output from the speaker unit A37. This corresponds to the function of the audio processing unit A26.

[0056] The time at which the test sound is output is stored in a predetermined time storage area (e.g., a RAM area) and is used to calculate the elapsed time in step S15, which will be described later. Once the test sound is output, the process proceeds to step S12.

[0057] <Step S12> In step S12, the interphone unit 18 picks up the output test sound TA (see FIG. 4) and temporarily stores it in a predetermined storage area for sound analysis (for example, a RAM area). This corresponds to the function of the sound analysis unit 38. Once the test sound has been stored, the process proceeds to step S13.

[0058] <Step S13> In step S13, a test sound signal is output at a predetermined time t2 (see FIG. 4). This test sound is used to test the transmission delay of the display device B17. In response to this test sound signal, the test sound is played from the speaker unit B32. This corresponds to the function of the audio processing unit B28. In this case, the test sound played is the test sound after the HDMI conversion process has been performed.

[0059] The time at which the test sound is output is stored in a predetermined time storage area (e.g., a RAM area) and is used to calculate the elapsed time in step S15, which will be described later. Once the test sound is output, the process proceeds to step S14.

[0060] <Step S14> In step S14, the interphone unit 18 picks up the output test sound TB (see FIG. 4) and temporarily stores it in a predetermined storage area for sound analysis (for example, a RAM area). This corresponds to the function of the sound analysis unit 38. Once the test sound has been stored, the process proceeds to step S15.

[0061] <Step S15> In step S15, the elapsed times (TAtim, TBtim) from the time of the test sound signal to the time of occurrence of the maximum amplitude of each of the test sounds TA and TB stored in the sound analysis memory area are calculated. This is achieved by the method described in FIG. 4 and corresponds to the function of the sound analysis unit 38. Once the elapsed times (TAtim, TBtim) are calculated, they are temporarily stored in a predetermined elapsed time memory area (e.g., a RAM area). When this process is completed, the process proceeds to step S16.

[0062] <Step S16> In step S16, the elapsed time (TAtim, TBtim) calculated in step S15 is read from the elapsed time storage area, and a calculation is performed to calculate the delay time Δt (Δt=TBtim-TAtim). This corresponds to the function of the calibration unit 39. The delay time Δt is temporarily stored in a delay time storage area (for example, a RAM area). The delay time Δt is used in the control step of step S23, which will be described later. When step S16 is completed, the process proceeds to step S17.

[0063] <Step S17> In step S17, since the delay time Δt has been calculated, the flag state in step S10 is updated, and the flag is changed from "1" to "0". After this, the process exits to "END". After that, when the start timing arrives again, the process resumes from "START". The following explanation is about the process after the flag has been changed from "1" to "0".

[0064] <Step S18> Returning to step S10, if it is determined that the calibration setting mode is not in effect (flag "0"), a determination is made in step S18 as to whether or not to broadcast the content. If it is determined that it is time to broadcast the content (Yes determination), the process proceeds to step S19, and if it is determined that it is not the time to broadcast the content (No determination), the process skips to "END".

[0065] <Step S19> In step S19, in order to broadcast the content, the process executes a process of reading out audio information and video information corresponding to the content from the audio / video data storage unit 24. Once the content information has been read, the process proceeds to step S20.

[0066] <Step S20> In step S20, the read audio information and video information are sent to the image memory and audio memory of display device A16, and similarly, the read audio information and video information are sent to the image memory and audio memory of display device B17. This corresponds to the functions of image processing units 25 and 27 and audio processing units 26 and 28. When the processing of step S18 is completed, the broadcasting of the content on display device A17 and display device B17 is executed as shown in steps S21 to S25.

[0067] <Step S21>, <Step S22> Step S21 is a process related to the display device A 16. In step S21, processes required for the audio information and video information, such as time synchronization between the video information and the audio information, are performed, and the process proceeds to step S23.

[0068] Furthermore, step S22 is processing related to the display device B17. In step S22, processing required for the audio information and video information, such as processing to temporally synchronize the video information and audio information, is performed, and the process proceeds to step S24. Note that at this time, the video information and audio information pass through the HDMI conversion unit, and therefore a transmission delay occurs due to the conversion process.

[0069] <Step S23>, <Step S24> Step S23 is processing related to the display device A16. In step S23, the delay time Δt set in step S16 is read from the delay time storage area, and the audio information and video information are delayed and output. The delay in this case is a delay in the broadcast start times of the audio information and video information. This is the function of the image delay correction unit 34 and audio delay correction unit 35. When the processing of step S23 is completed, the process proceeds to step S25.

[0070] Step S24 is processing related to the display device B17. In step S24, the HDMI-converted video information and audio information are restored to the original video information and audio information and output to the display unit B31 and the speaker unit B32. Note that the video information and audio information at this time has a delay time Δt with respect to the display device A16 due to a transmission delay caused by the HDMI conversion process.

[0071] <Step S25> Step S25 is a process related to the display device A16. The process in step S23 delays the broadcast start times of the video information and audio information by the delay time Δt. As a result, the video information output from the display unit A36 and the audio information output from the speaker unit A37 are delayed by the delay time Δt from the original broadcast start times.

[0072] The image processing unit A25 and the audio processing unit A26, and the image processing unit B27 and the audio processing unit B28 receive video information and audio information at the same time. Here, the presence of the HDMI conversion unit causes a transmission delay on the display device B17 side, delaying the broadcast start time of the content. On the other hand, the transmission delay of the HDMI conversion unit is reflected in the delay time Δt on the display device A16 side, which also delays the broadcast start time of the content.

[0073] Therefore, the broadcast start times of the content broadcast by the display device A 16 and the display device B 17 are adjusted to be approximately the same time. In this way, there is no time difference in the broadcast of the content between the two display devices, so passengers in the car will not feel uncomfortable because the same content is broadcast at approximately the same time.

[0074] As described above, according to the present invention, in an elevator system arranged in an elevator shaft of a building and comprising at least a first display device having a first display unit and a first speaker unit, and a second display unit having a second display unit and a second speaker unit, and a content control means for simultaneously broadcasting the same content or mutually related content from the first display device and the second display device, the content control means is characterized by comprising a delay time estimation means for calculating a delay time from the difference between the elapsed time until a test sound is sounded from the first speaker unit based on a test sound sounding signal and the elapsed time until a test sound is sounded from the second speaker unit based on the test sound sounding signal, and a delay correction means for delaying the broadcast start time of the content of the first display device or the second display device with the shorter elapsed time based on the delay time calculated by the delay time estimation means and then broadcasting the content.

[0075] This makes it possible to provide an elevator device that can improve the simultaneity of content broadcasting even when multiple display devices using different transmission methods are installed inside the elevator car.

[0076] The present invention is not limited to the above-described embodiments, but includes various modifications. The above-described embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to add, delete, or replace other configurations with respect to the configuration of each embodiment. [Explanation of symbols]

[0077] 10...car, 13...car control unit, 14...car side control unit, 16...first display device, 17...second display device, 18...intercom unit, 22...content control unit, 23...overall control unit, 24...audio / video data storage unit, 25...image processing unit A, 26...audio processing unit A, 27...image processing unit B, 28...audio processing unit B, 29...HDMI conversion unit, 31...display unit B, 32...speaker unit B, 34...image delay correction unit, 35...audio delay correction unit, 36...display unit A, 37...speaker unit A, 38...sound analysis unit, 39...calibration unit.

Claims

1. An elevator system is provided in an elevator shaft of a building, the elevator system comprising: a car equipped with at least a first display device having a first display unit and a first speaker unit, and a second display device having a second display unit and a second speaker unit; and content control means for simultaneously broadcasting the same content or mutually related content from the first display device and the second display device, The content control means a delay time estimation means for estimating a delay time from the difference between the elapsed time until the test sound is produced from the first speaker unit based on the test sound production signal and the elapsed time until the test sound is produced from the second speaker unit based on the test sound production signal; a delay correction means for delaying a broadcast start time of the content on the first display device or the second display device, whichever has the shorter elapsed time, based on the delay time calculated by the delay time estimation means when broadcasting the content, and then broadcasting the content; An elevator device comprising:

2. 2. The elevator apparatus according to claim 1, The first display device is a display device that uses video / audio information that constitutes the content as is, and the second display device is a display device that uses the video / audio information after converting it into digital form using a conversion processing unit. An elevator device characterized by:

3. 3. The elevator apparatus according to claim 2, The content control means is mounted on the car. An elevator device characterized by:

4. 3. The elevator apparatus according to claim 2, The car is equipped with an intercom that picks up sounds inside the car, The delay time estimation means a sound analysis means for determining the time when the test sound signal is generated and the time elapsed from the time when the test sound is generated until the time when the maximum amplitude of the test sound picked up by the intercom is generated; a calibration means for calculating the delay time from the difference between the elapsed time until the test sound is emitted from the first speaker unit and the elapsed time until the test sound is emitted from the second speaker unit. An elevator device characterized by:

5. 5. The elevator apparatus according to claim 4, The delay time estimation means The device is operated in response to a switching signal of a maintenance switch when maintenance inspection is performed, or in response to a detection signal that detects that there is no passenger in the car. An elevator device characterized by:

6. 5. The elevator apparatus according to claim 4, The test sound emitted from the first speaker unit and the second speaker unit has a frequency outside the audible range that passengers can hear. An elevator device characterized by:

7. A content broadcast control method for an elevator system including a content control means for simultaneously broadcasting the same content or mutually related content from a first display device having a first display unit and a first speaker unit and a second display device having a second display unit and a second speaker unit, the method comprising: The content control means an elapsed time measuring step of measuring an elapsed time until a test sound is produced from the first speaker unit based on a test sound production signal, and an elapsed time until the test sound is produced from the second speaker unit based on the test sound production signal; a delay time estimation step of calculating a delay time from a difference between the elapsed time on the first display device and the elapsed time on the second display device; a delay correction step of delaying a broadcast start time of the content on the first display device or the second display device, whichever has the shorter elapsed time, based on the delay time and then broadcasting the content. A content broadcast control method for an elevator device, comprising:

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