Display control device, display device, method, storage medium, and program product

Abstract

The invention provides a display control apparatus, a display apparatus, a method, a storage medium, and a program product. The display control device is provided with: a control unit that controls the light source unit; the control part sets one rhythm from a plurality of rhythms; changing the display form of the light irradiated from the light source unit and reflected on the display unit from a third display form to a first display form according to the timing of a first beat of the set rhythm; a first period in which the light changes between the third display mode and the first display mode and is shown has a fixed length regardless of the set rhythm; the fixed length is less than the length of one beat of the fastest rhythm among the rhythms that can be set.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2023-154096 filed on September 21, 2023, and all the contents of the basic application are incorporated into this application. Technical Field

[0002] The present disclosure relates to a display control device, a display device, a method, a storage medium and a computer program product. Background Art

[0003] An electronic metronome that uses light to visually convey beats or rhythms to a user is known. For example, the specific structure of such an electronic metronome is described in International Publication No. 2005 / 93529.

[0004] The electronic metronome described in International Publication No. 2005 / 93529 has an array in which a plurality of light emitting elements are arranged in a vertical row. The electronic metronome simulates the movement of a conductor's baton by sequentially switching the light emitting elements to be lit so that the light moves in the vertical direction.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: International Publication No. 2005 / 93529 Summary of the invention

[0008] Problems to be solved by the invention

[0009] In the conventional electronic metronome exemplified in Patent Document 1, it is difficult to know the timing of the beat from the rhythm, for example. Such an electronic metronome (an example of a display device) has room for improvement in terms of making it easier for the user to grasp the timing of the beat.

[0010] The present disclosure is made in view of the above situation, and an object of the present disclosure is to provide a display control device, a display device, a method, a storage medium, and a computer program product that allow a user to easily grasp the timing of a beat.

[0011] Means used to solve problems

[0012] The display control device disclosed in the present invention includes a control unit for controlling a light source unit. The control unit sets one rhythm from a plurality of rhythms; the display form of light irradiated from the light source unit and projected on the display unit changes from a third display form to a first display form at a timing matching the first beat of the set rhythm; the first period during which the light changes between the third display form and the first display form and is projected is a fixed length regardless of the set rhythm; the fixed length is a length that is less than one beat of the fastest rhythm among the rhythms that can be set.

[0013] Effects of the Invention

[0014] According to the present disclosure, it is possible to provide a display control device, a display device, a method, a storage medium, and a computer program product that allow a user to easily grasp the timing of a beat. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall perspective view of an electronic musical instrument according to one embodiment of the present disclosure.

[0016] Figure 2 This is a partial perspective view of an electronic musical instrument according to one embodiment of the present disclosure.

[0017] Figure 3 This is a block diagram showing the structure of an electronic musical instrument according to one embodiment of the present disclosure.

[0018] Figure 4 This is an exploded perspective view of a display unit included in an electronic musical instrument according to an embodiment of the present disclosure.

[0019] Figure 5 This is an explanatory diagram of a case where a display unit is operated as an electronic metronome in one embodiment of the present disclosure.

[0020] Figure 6 This is an explanatory diagram of a case where a display unit is operated as an electronic metronome in one embodiment of the present disclosure.

[0021] Figure 7 This is a diagram showing the relationship between the display form of light projected on the display unit and time in one embodiment of the present disclosure.

[0022] Figure 8 This is a diagram for explaining the length on the time axis of light pulsation projected on the display unit in one embodiment of the present disclosure.

[0023] Fig. 9A This is a flowchart showing a metronome process executed by a sub-processor included in an electronic musical instrument according to an embodiment of the present disclosure.

[0024] Fig. 9B This is a flowchart showing a metronome process executed by a sub-processor included in an electronic musical instrument according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] A display control device, a display device, and a method and a program executed by the display device as an example of a computer according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0026] Figure 1 It is an overall perspective view of an electronic musical instrument 1 according to one embodiment of the present invention. Figure 2 It is a partial perspective view of the electronic musical instrument 1 . Figure 3 : is a block diagram showing the structure of the electronic musical instrument 1.

[0027] The electronic musical instrument 1 is an example of a display device including a display control device, and is, for example, an electronic piano.

[0028] The display control device according to the present embodiment includes a control unit for controlling the light source unit. The control unit sets one rhythm from a plurality of rhythms; and changes the display form of the light irradiated from the light source unit and projected on the display unit from the third display form to the first display form at the timing matching the first beat of the set rhythm. The first period during which the light changes between the third display form and the first display form and is projected is a fixed length regardless of the set rhythm. The fixed length is a length that is less than one beat of the fastest rhythm among the rhythms that can be set.

[0029] That is, the display device according to the present embodiment operates as an electronic metronome that visually transmits a beat or rhythm to a user using light. In the display device according to the present embodiment, the first period during which the light changes between the third display form and the first display form and is displayed is shorter than the length of one beat of the fastest rhythm regardless of the set rhythm. Since the display form of light matching the timing of the beat is displayed in a shorter time, there is no ambiguity in the timing of the beat, and as a result, the timing of the beat is emphasized. Therefore, it is easy for the user to grasp the timing of the beat.

[0030] The electronic musical instrument 1 may be an electronic keyboard instrument other than an electronic piano, such as an electronic keyboard, or may be another type of electronic musical instrument such as an electronic percussion instrument, an electronic wind instrument, or an electronic string instrument.

[0031] like Figure 1 and Figure 2 As shown, the electronic musical instrument 1 includes a cabinet 2 . The cabinet 2 supports a keyboard 13A, pedals 13B, an operation panel 14 , and a display unit 16 .

[0032] like Figure 3 As shown, the electronic musical instrument 1 includes a main processor 10M, a sub-processor 10S, a RAM (Random Access Memory) 11, a flash ROM (Read Only Memory) 12, a keyboard 13A, a pedal 13B, an operation panel 14, a key scanner 15, a display unit 16, a sound source LSI (Large Scale Integration) 17, a D / A converter 18, an amplifier 19, and a speaker 20. The various components of the electronic musical instrument 1 are connected via a bus 21.

[0033] The main processor 10M and the sub-processor 10S respectively read out the program and data stored in the flash ROM 12. The main processor 10M and the sub-processor 10S control the electronic musical instrument 1 by using the RAM 11 as a work area.

[0034] The main processor 10M and the sub-processor 10S are, for example, single processors or multiple processors, each including at least one processor. In the case of a structure including multiple processors, the main processor 10M and the sub-processor 10S may be packaged as a single device, or may be composed of multiple devices physically separated in the electronic musical instrument 1. The main processor 10M and the sub-processor 10S may also be called a control unit, a CPU (Central Processing Unit), an MPU (MicroProcessor Unit), or an MCU (Micro Controller Unit).

[0035] The main processor 10M and the sub-processor 10S may not be independent processors but may be a single processor.

[0036] The RAM 11 temporarily stores data and programs. The RAM 11 stores various data such as various programs and waveform data read from the flash ROM 12 .

[0037] The flash ROM 12 is a nonvolatile semiconductor memory such as a flash memory, an EPROM (Erasable Programmable ROM), or an EEPROM (Electrically Erasable Programmable ROM). The flash ROM 12 stores control programs 12M and 12S as an example. The main processor 10M and the sub-processor 10S execute the control programs 12M and 12S, respectively, to perform various processes related to one embodiment of the present invention.

[0038] The keyboard 13A includes a plurality of white keys and a plurality of black keys. Each key is associated with a different pitch. The electronic musical instrument 1 produces musical sounds in response to key operations on the keys included in the keyboard 13A.

[0039] The pedal 13B includes three pedals as performance operating members. Specifically, the pedal 13B includes a damper pedal, a soft pedal, and a sustain pedal. If the user presses a key while stepping on the pedal, the electronic musical instrument 1 adds a sound effect corresponding to the stepped pedal to the musical sound and performs sound generation processing.

[0040] The operation panel 14 includes various operation units such as a power switch and a setting switch for a metronome function.

[0041] The key scanner 15 monitors the pressing and releasing of keys on the keyboard 13A. If the key scanner 15 detects a key operation by the user, for example, it outputs a key event to the main processor 10M. The key event includes information on the pitch of the key related to the key operation (key number). The key number may also be called a key number, a MIDI (Musical Instrument Digital Interface) key, or a note number.

[0042] In this embodiment, a mechanism for measuring the key pressing speed (force) of the key is also provided, and the force measured by the mechanism is also included in the key pressing event. For example, a plurality of contact switches are provided for each key. The force is measured based on the difference in the time when each contact switch is turned on when the key is pressed. The force can also be said to be a value indicating the strength of the key pressing operation, and can also be said to be a value indicating the size (volume) of the musical sound.

[0043] The display unit 16 operates as an electronic metronome that visually conveys beats or rhythms to the user using light. The display unit 16 will be described in detail later.

[0044] The waveform data is stored in the flash ROM 12 or other memory not shown. The waveform data is loaded into the RAM 11 during the startup process of the electronic musical instrument 1 so that the musical sound can be quickly produced in response to the key operation. When the main processor 10M detects the key operation by the key scanner 15, it instructs the sound source LSI 17 to read the corresponding waveform data from the waveform data loaded in the RAM 11. The waveform data to be read is determined, for example, based on the timbre selected by the user's operation and the key event.

[0045] The sound source LSI 17 generates musical sounds based on the waveform data read from the RAM 11 under the instruction of the main processor 10M. The sound source LSI 17 has, for example, 128 generator segments and can generate a maximum of 128 musical sounds simultaneously. In addition, in the present embodiment, the main processor 10M, the sub-processor 10S, and the sound source LSI 17 are configured as different processors, but in other embodiments, they may be configured as one or two processors.

[0046] The digital musical sound data generated by the sound source LSI 17 is converted into an analog signal by the D / A converter 18 , amplified by the amplifier 19 , and output to the speaker 20 .

[0047] Figure 4 is an exploded perspective view of the display unit 16. Figure 4 As shown, the display unit 16 includes a metal plate member 160 , a light source portion 162 , an insulating sheet 164 , and a display portion 166 .

[0048] The sheet metal member 160 is supported inside the housing 2 . Each component of the display unit 16 is supported by the housing 2 via the sheet metal member 160 .

[0049] The light source unit 162 includes an LED (Light Emitting Diode) substrate 162A and LEDs 162B.

[0050] The LED substrate 162A is a rectangular substrate. A plurality of LEDs (an example of a light-emitting element) 162B are mounted on the LED substrate 162A. In the present embodiment, 20 LEDs 162B are arranged in a row at equal intervals in the longer direction of the LED substrate 162A (for convenience, the "left-right direction"). The LEDs 162B are, for example, white LEDs that emit simulated white light.

[0051] The insulating sheet 164 is a rectangular sheet member having a shape corresponding to the LED substrate 162A and a size slightly larger than the LED substrate 162A, and has insulating properties. The insulating sheet 164 is sandwiched between the metal plate member 160 and the LED substrate 162A to prevent a short circuit between the metal plate member 160 and the LED substrate 162A.

[0052] The display unit 166 includes a light guide member 166A, a light shielding box 166B, a diffusion sheet 166C, and an acrylic resin panel 166D.

[0053] The light guide member 166A is made of, for example, polycarbonate or acrylic resin having light transmittance. The light guide member 166A is assembled to the light shielding box 166B. The light guide member 166A is located in front of each LED 162B when assembled to the light shielding box 166B. The light guide member 166A guides the light emitted from the LED 162B toward the front.

[0054] The light shielding box 166B is made of, for example, black polystyrene and has light shielding properties. The light shielding box 166B is formed into a rectangular shape that is long in the left-right direction. An emission opening 166b is formed in the approximate center of the light shielding box 166B. The emission opening 166b is a rectangular shape that is long in the left-right direction.

[0055] The light emitted from LED 162B is reflected on display unit 166. That is, display unit 166 reflects the light emitted from light source unit 162.

[0056] Specifically, most of the light emitted from the LED 162B enters the light guide member 166A. A part of the light incident on the light guide member 166A travels substantially straight inside the light guide member 166A and is emitted from the light guide member 166A.

[0057] The emitting surface of the light guide member 166A is embossed, so that light reaching the emitting surface of the light guide member 166A is diffusely reflected by the embossed surface and is emitted from the emitting surface with high efficiency.

[0058] The diffusion sheet 166C is made of, for example, PET (polyethylene terephthalate) and has light diffusing properties. The light emitted from the light guide member 166A is diffused by the diffusion sheet 166C, emitted from the emission opening 166b to the front with substantially uniform brightness from the light shielding box 166B.

[0059] The acrylic panel 166D is attached to the front surface of the light shielding box 166B. The light diffused by the diffusion sheet 166C and emitted from the light shielding box 166B is emitted to the outside through the acrylic panel 166D.

[0060] In addition, the light emitted from the light guide member 166A is shielded by the light shielding box 166B at the portion other than the emission opening 166b. That is, only the rectangular area defined by the emission opening 166b that is longer in the left-right direction is a display area (hereinafter, given a reference numeral 168) where the light can be reflected. Hereinafter, the light reflected in the display area 168 is referred to as "light L".

[0061] The display area 168 (in other words, the emission opening 166b) is located on the front side of the 20 LEDs 162B arranged in a row in the left-right direction. Figure 2 In the figure, LEDs 162B are shown for the convenience of clearly showing the positional relationship between the display area 168 and each LED 162B. The LEDs 162B are located behind the acrylic resin panel 166D, the diffusion sheet 166C, and the light guide member 166A. Therefore, these LEDs 162B are not visible in appearance.

[0062] Specifically, the display unit 166 is accommodated in the interior of the housing 2 and is provided with an acrylic resin panel 166D. Figure 1 As shown, the appearance surface (surface) is flat. In addition, the external light hardly reaches the inside of the box 2 through the light shielding box 166B located on the back side of the acrylic resin panel 166D. Therefore, it is difficult for the user to visually confirm the various parts in the box 2.

[0063] That is, even if the user visually observes the portion where the LED 162B is arranged, the user cannot visually confirm the position of the LED 162B. Therefore, the user cannot understand in which range the light L is reflected when the LED 162B is not turned on.

[0064] Figure 5 and Figure 6 This is an explanatory diagram of a case where the display unit 16 is operated as an electronic metronome.

[0065] Figure 5 168 represents the change in the display position of the light L projected in the display area 168 on the time axis. Figure 5 The left figure shows the situation where the light L represents three beats in the display area 168. Figure 5 In the figure, the curve graph on the right corresponds to the graph on the left, and shows the relationship between the display form of the light L and time.

[0066] like Figure 5 As shown, the width (length in the left-right direction) of the light L changes in a pulsating manner in accordance with the beat. Figure 5 In the figure, the symbol LS represents the initial width of the light L. The symbol LM represents the width of the light L at the weak beat timing. The symbol LL represents the width of the light L at the strong beat timing. Hereinafter, the initial width of the light L is referred to as "initial width LS". The width of the light L at the weak beat timing is referred to as "weak beat width LM". The width of the light L at the strong beat timing is referred to as "strong beat width LL".

[0067] In addition, in this embodiment, a "strong beat" refers to the first beat of n (n is a natural number) beats, and a "weak beat" refers to the second to nth beats. For example, in the case of 4 beats, the first beat is a strong beat, and the second to fourth beats are weak beats. In addition, not all the beats after the second beat are weak beats. At least one of the weak beats included in the second and later beats may be replaced with a medium strong beat that is stronger than the weak beat and weaker than the strong beat.

[0068] The light of strong beat width LL is an example of light of the first display form having the first width, and represents strong beat. The light of weak beat width LM is an example of light of the second display form having the second width, and represents weak beat. The light of initial width LS is an example of light of the third display form having the third width.

[0069] The weak beat width LM is wider than the initial width LS. The strong beat width LL is wider than the weak beat width LM. As for the ratio of these widths, when the initial width LS is set to 1, for example, the weak beat width LM is 4 and the strong beat width LL is 10.

[0070] The timing of the strong beat is an example of the timing of the first beat. The timing of the weak beat is an example of the timing of the second beat.

[0071] The light L has an initial width LS as the minimum width, and expands and contracts in accordance with the timing of the beat. The light L expands to the weak beat width LM at the timing of the weak beat. The light L expands to the strong beat width LL at the timing of the strong beat.

[0072] That is, light L Figure 5As shown, the light L instantaneously expands from the initial width LS to the strong beat width LL in accordance with the timing of the strong beat, and then returns to the initial width LS. Next, the light L instantaneously expands from the initial width LS to the weak beat width LM in accordance with the timing of the weak beat, and then returns to the initial width LS. The light L instantaneously expands from the initial width LS to the weak beat width LM in accordance with the timing of the weak beat, and then returns to the initial width LS. In this way, the light L is expanded and contracted in a pulsating manner in accordance with the strong beat, weak beat, and weak beat, and the three beats are expressed by the light L.

[0073] Figure 6 1 is a diagram showing the relationship between each display mode of light L and the lighting pattern of LED 162B. Figure 6 In the figure, the LED 162B located on the far left of the 20 LEDs 162B is recorded as "LED 1". The LEDs 162B located on the right are given higher numbers. Therefore, the LED 162B located on the far right of the 20 LEDs 162B is recorded as "LED 20". Figure 6 In the figure, the numerical value (0 to 100) indicates the brightness of LED 162B. A brightness of 0 indicates that LED 162B is not lit. A brightness of 100 indicates that LED 162B is lit at the highest brightness.

[0074] The LED 162B is controlled by the sub-processor 10S to emit light. Figure 6 As shown, the light L is controlled to emit light in 1000 lighting patterns corresponding to the widths L1 to L1000, respectively.

[0075] The larger the numerical value (L1 to L1000) of the light L is, the wider the width in the left-right direction is. Hereinafter, the lighting patterns corresponding to the widths L1 to L1000 are assigned the labels LP1 to LP1000. In addition, the width L1 (lighting pattern LP1), the width L500 (lighting pattern LP500), and the width L1000 (lighting pattern LP1000) are the initial width LS, the weak beat width LM, and the strong beat width LL, respectively.

[0076] The subprocessor 10S switches the lighting pattern of the LEDs 162B appropriately to control the light emission of the 20 LEDs 162B. That is, the subprocessor 10S controls the light source unit 162 to act as a control unit that controls the display form (here, width) of the light L on the display unit 166.

[0077] For example, the subprocessor 10S turns on LED9 to LED11 at brightnesses of 51, 100, and 51, respectively, and does not turn on LED1 to LED8 and LED12 to LED20. That is, if the subprocessor 10S performs light emission control in the lighting pattern LP1, the light L is projected at the position P1 in the center of the display area 168 as light having an initial width LS.

[0078] Next, the subprocessor 10S gradually and slightly increases the brightness of the LEDs located to the left and right of the LED 10. If the subprocessor 10S sequentially performs light emission control in the lighting pattern after the lighting pattern LP2, the width of the light L gradually expands in a smooth motion.

[0079] By gradually changing the brightness of the plurality of LEDs 162B individually, it is possible to express a situation in which the width of the light L is expanded with a smooth motion.

[0080] If the timing of the strong beat is close, the subprocessor 10S switches the lighting pattern from the lighting pattern LP1 to LP1000 at a high speed, and the light L is instantly extended from the initial width LS to the strong beat width LL. Once the subprocessor 10S extends the light L to the strong beat width LL at the timing of the strong beat, it switches the lighting pattern from the lighting pattern LP1000 to LP1 at a high speed, and the light L is instantly returned from the strong beat width LL to the initial width LS. Figure 5 As shown, the light L is displayed in a form of large pulsation to express a strong beat.

[0081] If the timing of the weak beat is close, the subprocessor 10S switches the lighting pattern from the lighting pattern LP1 to LP500 at a high speed in sequence, and the light L is instantly extended from the initial width LS to the weak beat width LM. Once the subprocessor 10S extends the light L to the weak beat width LM at the timing of the weak beat, it switches the lighting pattern from the lighting pattern LP500 to LP1 at a high speed in sequence, and the light L is instantly returned from the weak beat width LM to the initial width LS. Figure 5 As shown, the light L is displayed in the form of a small earth pulsation to express a weak beat.

[0082] In this way, the sub-processor 10S continuously changes the width of the light L so that the light L pulsates in timing matching the beat.

[0083] The twenty LEDs 162B (an example of a plurality of light emitting elements) are arranged in a straight line corresponding to the width direction of the light L.

[0084] In this embodiment, many (1000) display modes (widths) are switched sequentially at high speed. Since the resolution of the scalable width is high and the width is switched at high speed, the width of the light L appears to be smoothly expanded and contracted within the display area 168 .

[0085] The operation of the display unit 16 as an electronic metronome will be described in more detail.

[0086] Figure 7 : is a graph showing the relationship between the display form (width) of light L and time. Figure 7In FIG. 1 , reference numerals TL1 and TL4 indicate the timing of strong beats, and reference numerals TM2 and TM3 indicate the timing of weak beats. Figure 7 In the example, a three-beat rhythm of repeated strong beat, weak beat, and weak beat is shown. Each period indicated by a double-headed arrow (the period from the timing TL1 of the strong beat to the timing TM2 of the weak beat, the period from the timing TM2 of the weak beat to the timing TM3 of the weak beat, and the period from the timing TM3 of the weak beat to the timing TL4 of the strong beat) is of the same length, which is equivalent to the length of one beat.

[0087] The period PDL is an example of the first period, and indicates a period during which the light L changes between the initial width LS and the strong beat width LL and appears in the display area 168. The period PDM is an example of the second period, and indicates a period during which the light L changes between the initial width LS and the weak beat width LM and appears in the display area 168. The period PDS is an example of the third period, and indicates a period during which the light L is fixed at the initial width LS.

[0088] Incidentally, the period PDL is a period from the first time point (for example, time point TL1a) before the timing of the strong beat to the second time point (for example, time point TL1b) after the timing of the strong beat. The period PDM is a period from the third time point (for example, time point TL2a) before the timing of the weak beat to the fourth time point (for example, time point TL2b) after the timing of the weak beat. The period PDS is a period between the period PDL (or the period PDM) and the period PDM.

[0089] like Figure 7 As shown, the width of the light L is stretched momentarily in a large pulsating manner in the initial period PDL. The light L is fixed at the initial width LS in the next period PDS, and changes in width in a small pulsating manner in the next period PDM. The light L is fixed at the initial width LS in the next period PDS, and changes in width in a small pulsating manner again. During the period when the electronic metronome function is turned on, the light L expresses three beats by repeating such pulsating action.

[0090] In more detail, when the light L enters the period PDL (an example of the first time point, for example, when it reaches the time point TL1a), it expands from the initial width LS to the strong beat width LL in the period until the timing of the strong beat (for example, the timing TL1), and returns from the strong beat width LL to the initial width LS in the period from the timing of the strong beat to the end point of the period PDL (an example of the second time point, for example, the time point TL1b). That is, the light L instantly expands to the strong beat width LL representing the strong beat at the timing of the strong beat.

[0091] When the light L enters the period PDM (an example of the third time point, for example, when it reaches the time point TM2a), it expands from the initial width LS to the weak beat width LM in the period before the timing of the weak beat (for example, the timing TM2), and returns from the weak beat width LM to the initial width LS in the period from the timing of the weak beat to the end point of the period PDM (an example of the fourth time point, for example, the time point TM2b). That is, the light L instantly expands to the weak beat width LM representing the weak beat at the timing of the weak beat.

[0092] For example, if the light L slowly expands and contracts over a period of time, the timing of the beat becomes blurred. Furthermore, if the expansion and contraction is slowly reproduced in a smooth expression such as pulsation (that is, if the light L slowly and smoothly expands and contracts), the timing of the beat becomes even more blurred. Therefore, in this embodiment, the display form of the light L is changed so that the light L pulsates in a short period of time.

[0093] Figure 8 2 is a diagram illustrating the length of the pulsation of light L on the time axis. Figure 7 Similarly to the example, each period indicated by the bidirectional arrows (the period from the timing TL1 of the strong beat to the timing TM2 of the weak beat, and the timing period of each beat after the timing TM2 of the weak beat omitted in the figure) is the same length, which is equivalent to the length of 1 beat.

[0094] The user can operate the operation panel 14 to set the rhythm of the electronic metronome. Figure 8 The upper, middle, and lower figures of the diagram respectively show the relationship between the display form (width) of the light L and time when the set rhythm is set to rhythm TMP1, TMP2, and TMP3. Among the rhythms TMP1 to TMP3, rhythm TMP1 is the fastest rhythm, and rhythm TMP3 is the slowest rhythm. Rhythm TMP2 is a rhythm slower than rhythm TMP3, and is a rhythm faster than rhythm TMP1.

[0095] like Figure 8 As shown, the period PDL and the period PDM have fixed lengths regardless of the set tempo. The lengths of the period PDL and the period PDM are shorter than one beat of the fastest tempo among the tempos that can be set.

[0096] For example, the subprocessor 10S sets one tempo from tempos 20 to 255 according to user operation. In this case, the lengths of the period PDL and the period PDM are n% (eg, 20%, 40%, etc.) of the time taken for one beat of the tempo 255.

[0097] Thus, the light L pulsates only in a period shorter than one beat of the fastest rhythm. By matching the timing of the beat and projecting the light L in the display area 168 as if it pulsates only in a short period of time, there is no ambiguity in the timing of the beat, and as a result, the timing of the beat is emphasized. Therefore, the user can easily grasp the timing of the beat.

[0098] In addition, the faster the rhythm is, the shorter the fixed time of the light L (that is, the period PDS corresponding to the initial width LS) is. The slower the rhythm is, the longer the fixed time of the light L is.

[0099] Between the period PDL in which the light L pulsates greatly and the period PDM in which the light L pulsates slightly, there is a period PDS in which the light L does not move. The user can visually recognize that the light L does not move during the period PDS, and can intuitively grasp that it is the period between beats. By grasping the period without beats, the user can easily grasp the timing of the beats in the period PDL and the period PDM.

[0100] The time from the first time point to the timing of the strong beat (for example, the time from the time point TL1a to the timing TL1), the time from the timing of the strong beat to the second time point (for example, the time from the timing TL1 to the time point TL1b), the time from the third time point to the timing of the weak beat (for example, the time from the time point TM2a to the timing TM2), and the time from the timing of the weak beat to the fourth time point (for example, the time from the timing TM2 to the timing TM2b) are the same length or substantially the same length. By aligning the pulsation time of the light L before and after the timing of the beat to the same length or substantially the same length, the user can better grasp the timing of the beat in feeling.

[0101] Fig. 9A and Fig. 9B 1 is a flowchart showing a metronome process executed by the subprocessor 10S in one embodiment of the present invention. For example, when a user operates the operation panel 14 to turn on the electronic metronome function, the execution of the metronome process starts.

[0102] If the electronic metronome function is turned on, the main processor 10M sends a synchronization signal to the sub-processor 10S at a timing corresponding to the set rhythm (in other words, every time the timing of the beat comes), and outputs a sound notifying the beat from the speaker 20.

[0103] The set tempo is a tempo set by a user operation on the operation panel 14. When no such user operation is performed, the set tempo is an initially determined tempo.

[0104] As shown in FIG. 9 , the sub-processor 10S waits for a synchronization signal from the main processor 10M (step S101 ).

[0105] If the synchronization signal is received from the main processor 10M (step S101: Yes), the sub-processor 10S resets the count value of the built-in counter and starts counting up (step S102).

[0106] in addition, Figure 7 and Figure 8 The illustrated beat timing (TL1, TM2, etc.) is strictly the timing at which the subprocessor 10S receives the synchronization signal. The synchronization signal reception timing may be appropriately adjusted in consideration of the signal delay within the subprocessor 10S.

[0107] The subprocessor 10S determines whether this is a strong beat timing (step S103).

[0108] If it is the timing of the downbeat (step S103 : YES), the subprocessor 10S controls the light emission of the LED 162B with the lighting pattern LP1000 corresponding to the downbeat width LL (step S104 ), and returns to the process of step S101 .

[0109] In the case of weak beat timing (step S103 : No), the subprocessor 10S performs light emission control of the LED 162B with the lighting pattern LP500 corresponding to the weak beat width LM (step S105 ), and returns to the process of step S101 .

[0110] When the synchronization signal is not received from the main processor 10M (step S101 : No), the subprocessor 10S acquires the elapsed time TM (in other words, the count value of the built-in counter) from the last reception of the synchronization signal (step S106 ).

[0111] The subprocessor 10S determines whether the elapsed time TM acquired in step S106 is equal to or shorter than a first time (step S107 ). The first time is, for example, a half of the period PDL (period PDM).

[0112] When the elapsed time TM is equal to or less than the first time (step S107: Yes), only a little time has elapsed from the timing of the previous beat. The subprocessor 10S determines whether the previous beat is a strong beat (step S108).

[0113] If the previous beat is a strong beat (step S108: Yes), the subprocessor 10S performs light emission control of the LED 162B corresponding to the strong beat with a lighting pattern corresponding to the elapsed time TM based on the information stored in the flash ROM 12 (step S109), and returns to the process of step S101. The lighting pattern corresponding to the time TM when the previous beat is a strong beat is stored in the flash ROM 12, for example.

[0114] When the previous beat is a weak beat (step S108: No), the subprocessor 10S performs light emission control of the LED 162B corresponding to the weak beat with a lighting pattern corresponding to the elapsed time TM based on the information stored in the flash ROM 12 (step S110), and returns to the process of step S101. The lighting pattern corresponding to the time TM when the previous beat is a weak beat is stored in the flash ROM 12, for example.

[0115] When the elapsed time TM exceeds the first time (step S107 : No), the subprocessor 10S determines whether the current time point is within the period PDS (step S111 ).

[0116] When the current time point is within the period PDS (step S111 : Yes), the subprocessor 10S performs light emission control of the LED 162B with the lighting pattern LP1 corresponding to the initial width LS (step S112 ), and returns to the process of step S101 .

[0117] When the current time point is outside the period PDS (i.e., when the timing of the next beat is approaching after the period PDS) (step S111: No), the subprocessor 10S determines whether the previous beat is the last beat of the beat (step S113). For example, in the case of 3 beats, the second weak beat after the strong beat is the last beat of the beat. For example, in the case of 4 beats, the third weak beat after the strong beat is the last beat of the beat.

[0118] When the previous beat is the last beat of the beat (step S113: Yes), the next beat is the first beat of the next beat (i.e., the strong beat). Therefore, the subprocessor 10S controls the light emission of the LED 162B corresponding to the strong beat with the lighting pattern corresponding to the elapsed time TM based on the information stored in the flash ROM 12 (step S114), and returns to the process of step S101.

[0119] If the previous beat is not the last beat of the beat (step S113: No), and the next beat is the next weak beat of the same beat, the subprocessor 10S controls the light emission of the LED 162B corresponding to the weak beat in a lighting pattern corresponding to the elapsed time TM based on the information stored in the flash ROM 12 (step S115), and returns to the process of step S101.

[0120] The subprocessor 10S repeatedly executes Fig. 9A and Fig. 9B The metronome process shown in the figure is continued until, for example, the electronic metronome function is turned off. In other words, if the electronic metronome function is turned off, the sub-processor 10S ends the execution of the metronome process.

[0121] By executing the metronome processing shown in FIG9 , the pulsation of the light L matching the timing of the beat is projected in the display area 168 in a shorter time. As a result, there is no ambiguity in the timing of the beat, and as a result, the timing of the beat is emphasized. Therefore, the user can easily grasp the timing of the beat.

[0122] From a little before the timing of the beat arrives, the light L starts to pulsate. The user can grasp the situation that the timing of the beat is approaching in advance by visually confirming that the light L starts to pulsate. From this point, the user can grasp the timing of the beat more easily.

[0123] In addition, the present invention is not limited to the above-mentioned embodiments, and can be variously deformed in the implementation stage without departing from the scope of its purpose. In addition, the functions performed in the above-mentioned embodiments can also be implemented in appropriate combination as long as possible. The above-mentioned embodiments include various stages, and various inventions can be extracted by appropriate combinations of multiple components disclosed. For example, even if some components are removed from all the components shown in the embodiments, as long as the effect can be obtained, the structure after removing the components can be extracted as an invention.

[0124] Any reference to an element using the terms "first" or "second" used in this disclosure does not limit the quantity or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, the reference to the first and second elements does not mean that only two elements can be used or that the first element must precede the second element in some form.

Claims

1. A display control device, characterized in that: A control unit having a function of controlling the light source unit; The above control unit: Set 1 rhythm from multiple rhythms; At a timing matching the first beat of the set rhythm, the display form of the light irradiated from the light source section and projected on the display section is changed from the third display form to the first display form; The first period during which the light changes between the third display mode and the first display mode is of a fixed length regardless of the set rhythm; The fixed length is a length shorter than one beat of the fastest tempo among the tempos that can be set.

2. The display control device according to claim 1, wherein: The above control unit: Matching the timing of the second beat of the set rhythm, the display form of the light changes from the third display form to the second display form; The second period during which the light changes between the third display mode and the second display mode is displayed is the fixed length regardless of the set rhythm.

3. The display control device according to claim 2, characterized in that: The above control unit: In the first period, at the timing of the first beat, the light is changed to the light of the first display form representing the strong beat; In the second period, the light is changed to light of the second display form representing the weak beat at the timing of the second beat.

4. The display control device according to claim 3, characterized in that: The light of the first display form is light of the first width; The light in the second display mode is light having a second width narrower than the first width.

5. The display control device according to claim 4, characterized in that: The control unit causes the light to be projected on the display unit as light of the third display form having a third width narrower than the first width and the second width in a third period other than the first period and other than the second period.

6. The display control device according to claim 2, wherein: The first period is a period from a first time point earlier than the timing of the first beat to a second time point later than the timing of the first beat; The second period is a period from a third time point before the timing of the second beat to a fourth time point after the timing of the second beat.

7. The display control device according to claim 6, characterized in that: The above control unit: During the period from the first time point to the timing of the first beat, the light is extended from the light of the third display form having the third width to the light of the first display form having a wider width, and during the period from the timing of the first beat to the second time point, the light is contracted from the light of the first display form to the light of the third display form; During the period from the third time point to the timing of the second beat, the light is extended from the light in the third display form to the light in the second display form having a width wider than the light in the third display form and narrower than the light in the first display form. During the period from the timing of the second beat to the fourth time point, the light is contracted from the light in the second display form to the light in the third display form.

8. A display device, characterized in that: have: The display control device according to claim 1; a light source portion; and The display unit reflects the light emitted from the light source unit.

9. A method for controlling a light source unit, which is executed by a computer having a processor for controlling the light source unit, characterized in that: include: Set 1 rhythm from multiple rhythms; At a timing matching the first beat of the set rhythm, the display form of the light irradiated from the light source section and projected on the display section is changed from the third display form to the first display form; The first period during which the light changes between the third display mode and the first display mode is of a fixed length regardless of the set rhythm; The fixed length is a length shorter than one beat of the fastest tempo among the tempos that can be set.

10. A non-transitory storage medium storing a program for causing a computer to execute a control of a light source unit, characterized in that: The procedures include: Set 1 rhythm from multiple rhythms; At a timing matching the first beat of the set rhythm, the display form of the light irradiated from the light source section and projected on the display section is changed from the third display form to the first display form; The first period during which the light changes between the third display mode and the first display mode is of a fixed length regardless of the set rhythm; The fixed length is a length shorter than one beat of the fastest tempo among the tempos that can be set.

11. A computer program product, characterized in that The computer controlling the light source unit executes: Set 1 rhythm from multiple rhythms; At a timing matching the first beat of the set rhythm, the display form of the light irradiated from the light source section and projected on the display section is changed from the third display form to the first display form; The first period during which the light changes between the third display mode and the first display mode is of a fixed length regardless of the set rhythm; The fixed length is a length shorter than one beat of the fastest tempo among the tempos that can be set.

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