Input interface device, electronic musical instrument, light emission control method and storage medium

A light emission control method that is performed by a computer that controls an input interface including a detector having a detection surface and configured to detect that an object is in contact with or in proximity to the detection surface and a plurality of light emitters disposed alongside the detector and configured to emit light to make the detection surface light up at positions corresponding to the light emitters, the method comprising:

• performing control to cause a first light emitter among the plurality of light emitters to emit light with a luminous intensity that is higher than a luminous intensity of a remaining light emitter, wherein the first light emitter corresponds to a contact or proximity point detected by the detector at which the object is in contact with or in proximity to the detection surface,
• while the object is moving along the detection surface in a state in which the object is in contact with or in proximity to the detection surface, performing control to gradually reduce a luminous intensity of a second light emitter among the plurality of light emitters, wherein the second light emitter corresponds to a position behind the contact or proximity point along a moving direction of the object along the detection surface where the object was previously detected as being in contact with or in proximity to the detection surface and at which the object is no longer detected as being in contact with or in proximity to the detection surface, and
• while the object is moving along the detection surface in the state in which the object is in contact with or in proximity to the detection surface, performing control to cause a third light emitter among the plurality of light emitters to emit light, wherein the third light emitter corresponds to a position in front of the contact or proximity point along the moving direction of the object along the detection surface where the object has not yet been detected as being in contact with or in proximity to the detection surface.

A non-transitory computer-readable storage medium storing a program causing a computer that controls an input interface including a detector having a detection surface and configured to detect that an object is in contact with or in proximity to the detection surface and a plurality of light emitters disposed alongside the detector and configured to emit light to make the detection surface light up at positions corresponding to the light emitters, to:

• perform control to cause, among the plurality of light emitters to emit light with a luminous intensity that is higher than a luminous intensity of a remaining light emitter, wherein the first light emitter corresponds to a contact or proximity point detected by the detector, the contact or proximity point at which the object is in contact with or in proximity to the detection surface, to emit light with a luminous intensity that is higher than a luminous intensity of a remaining light emitter, and
• while the object is moving along the plurality of light emitters in a state in which the object is in contact with or in proximity to the detection surface, perform control to gradually reduce a luminous intensity of a second light emitter among the plurality of light emitters, wherein the second light emitter corresponds to a position behind the contact or proximity point along a moving direction of the object along the detection surface where the object was previously detected as being in contact with or in proximity to the detection surface and at which the object is no longer detected as being in contact with or in proximity to the detection surface, and
• while the object is moving along the detection surface in the state in which the object is in contact with or in proximity to the detection surface, perform control to cause a third light emitter among the plurality of light emitters to emit light, wherein the third light emitter corresponds to a position in front of the contact or proximity point along the moving direction of the object along the detection surface where the object has not yet been detected as being in contact with or in proximity to the detection surface.