Abstract: A display control apparatus for controlling display of a display device that a user can wear acquires speech collected by a plurality of microphones, estimates a sound-arrival direction of the acquired speech, and generates a text image corresponding to the acquired speech. The display control apparatus determines an adjustment amount of a display position of the text image on the display unit of the display device based on a detection result of at least one of an operation by the user and a state of the display device. Then, the display control apparatus displays the generated text image at a display position in the display unit, the display position being determined in accordance with the estimated sound-arrival direction and the determined adjustment amount.

Abstract: A display control apparatus for controlling display of a display device acquires speech collected by a plurality of microphones and estimates a sound-arrival direction of the acquired speech. Then, the display control apparatus causes a text image corresponding to the acquired speech to be displayed in a predetermined text display area in a display unit of the display device, and causes a symbol image associated with the text image to be displayed at a display position in the display unit, the display position corresponding to the estimated sound-arrival direction.

Abstract: A sound absorber includes cavities mutually different in at least one of shape and size. A wall of a first cavity included in the cavities includes a first region and a second region. Through-holes connecting an interior to an exterior of the first cavity is formed in the first region. No through-holes connecting the interior and the exterior of the first cavity is formed in the second region adjacent to the first region. A wall of a second cavity included in the cavities includes a third region and a fourth region. Through-holes connecting an interior to an exterior of the second cavity is formed in the third region. No through-holes connecting the interior and the exterior of the second cavity is formed in the fourth region adjacent to the third region. Size of through-holes in the first region is different from size of through-holes in the third region.

Abstract: A sound absorber includes cavities mutually different in at least one of shape and size. A wall of a first cavity included in the cavities includes a first region and a second region. Through- holes connecting an interior to an exterior of the first cavity is formed in the first region. No through-holes connecting the interior and the exterior of the first cavity is formed in the second region adjacent to the first region. A wall of a second cavity included in the cavities includes a third region and a fourth region. Through-holes connecting an interior to an exterior of the second cavity is formed in the third region. No through-holes connecting the interior and the exterior of the second cavity is formed in the fourth region adjacent to the third region. Size of through-holes in the first region is different from size of through-holes in the third region.

Abstract: A sound absorbing unit includes: a perforated plate that is a plate member having a plurality of holes; a first cavity extending in a first direction, the first cavity allowing sound waves to enter through a plurality of holes present in a first region of the perforated plate; and a second cavity extending substantially parallel to the first direction, the second cavity allowing sound waves to enter through a plurality of holes present in a second region of the perforated plate. The first cavity and the second cavity are arranged in a second direction perpendicular to the first direction. A surface of the perforated plate is orthogonal to neither the first direction nor the second direction. The first cavity and the second cavity have different lengths in the first direction.

Abstract: A sound absorbing structure includes a perforated surface with a plurality of through-holes, a first cavity that has a portion extending non-parallel to a normal direction of the perforated surface, the first cavity being breathable between an interior and exterior of the first cavity via the plurality of through-holes existing in a first region of the perforated surface, and a second cavity that is breathable between an interior and exterior of the second cavity via the plurality of through-holes existing in a second region adjacent to the first region of the perforated surface.

Abstract: A fluid ejection device includes a fluid container having a fluid accommodation portion that has formed therein a fluid outlet and accommodates a fluid. A fluid pressing unit presses the fluid accommodation portion to cause the fluid to flow out of the fluid outlet. Connection piping has an end that is connected to the fluid outlet. A fluid ejection unit has a fluid intake port connected to the other end of the connection piping, and ejects in a pulsed manner the fluid received from the fluid intake port. A pressure detection unit detects pressure of the fluid accommodation portion when the fluid pressing unit presses the fluid accommodation portion, and outputs a level of a detection signal corresponding to the pressure. A press control unit stops the fluid pressing unit from pressing the fluid accommodation portion when the pressure indicated by the detection signal is a predetermined value or higher.

Abstract: A fluid ejection device includes a fluid ejection unit including a plurality of nozzles and configured to eject fluid from at least any one of the nozzles in a pulse-like manner according to a drive signal, a fluid supplying unit configured to supply the fluid to the fluid ejection unit, an ejecting-instruction input unit configured to receive an ejecting instruction input, a mode-selection input unit configured to receive an input of selection information for selecting any one of a first mode for ejecting the fluid using a first nozzle unit including at least one nozzle and a second mode for ejecting the fluid using a second nozzle unit including at least one nozzle, and a fluid-ejecting control unit configured to output, when receiving the ejecting instruction input, according to the selection information, the drive signal such that the fluid is ejected from the first nozzle unit or second nozzle unit.

Abstract: A fluid ejection device includes: a fluid ejection unit that ejects a fluid in a pulsed manner; a fluid accommodation portion that accommodates the fluid at a predetermined pressure or higher; a fluid supply unit that supplies the fluid accommodated in the fluid accommodation portion to the fluid ejection unit; a connection channel that connects the fluid ejection unit and the fluid accommodation portion, and acts as a channel through which the fluid flows; an opening and closing unit that opens and closes the connection channel; and a control unit that sends an open signal for opening the connection channel to the opening and closing unit, and sends an ejection signal for ejecting the fluid to the fluid ejection unit. The control unit sends the ejection signal after a predetermined amount of time has elapsed from the sending of the open signal.

Abstract: A fluid ejection device includes a fluid accommodation portion having an outlet and a fluid pressing unit that causes the fluid to flow out of the fluid outlet through a channel. A fluid ejection unit ejects in a pulsed manner the fluid received from a fluid intake port connected to the channel. A pressure detection unit detects an inner pressure of the fluid accommodation portion. A press control unit controls the inner pressure of the fluid accommodation portion to approach a target pressure value when the channel is closed. A channel determination unit determines that the channel is not closed if a detected movement speed of the fluid pressing unit is a predetermined speed or greater when a predetermined amount of time has elapsed after a difference between the inner pressure of the fluid accommodation portion and the target pressure value becomes less than a predetermined value.

Abstract: A fluid ejection device includes a fluid container having a fluid accommodation portion that has formed therein a fluid outlet and accommodates a fluid. A fluid pressing unit presses the fluid accommodation portion to cause the fluid to flow out of the fluid outlet. Connection piping has an end that is connected to the fluid outlet. A fluid ejection unit has a fluid intake port connected to the other end of the connection piping, and ejects in a pulsed manner the fluid received from the fluid intake port. A pressure detection unit detects pressure of the fluid accommodation portion when the fluid pressing unit presses the fluid accommodation portion, and outputs a level of a detection signal corresponding to the pressure. A press control unit stops the fluid pressing unit from pressing the fluid accommodation portion when the pressure indicated by the detection signal is a predetermined value or higher.

Abstract: A fluid ejection device includes a fluid container having a fluid accommodation portion that has formed therein a fluid outlet and accommodates a fluid. A fluid pressing unit presses the fluid accommodation portion to cause the fluid to flow out of the fluid outlet. Connection piping has an end that is connected to the fluid outlet. A fluid ejection unit has a fluid intake port connected to the other end of the connection piping, and ejects in a pulsed manner the fluid received from the fluid intake port. A pressure detection unit detects pressure of the fluid accommodation portion when the fluid pressing unit presses the fluid accommodation portion, and outputs a level of a detection signal corresponding to the pressure. A press control unit stops the fluid pressing unit from pressing the fluid accommodation portion when the pressure indicated by the detection signal is a predetermined value or higher.

Abstract: A fluid ejection device includes a fluid ejection unit that ejects a fluid and an ejection control unit that controls the ejection of the fluid. A fluid container accommodates the fluid supplied to the fluid ejection unit. A connection channel connects the fluid ejection unit and the fluid container. An opening and closing unit opens and closes the connection channel. A pressure adjustment unit controls the opening and closing unit and adjusts an inner pressure of the fluid container. The pressure adjustment unit increases the inner pressure higher than a predetermined pressure by instructing the opening and closing unit to close the connection channel and then instructing the opening and closing unit to open the connection channel after the inner pressure of the fluid container exceeds the predetermined pressure. The ejection control unit allows the fluid ejection unit to eject the fluid after the connection channel is opened.

Abstract: A fluid ejection device includes a fluid ejection unit that ejects a fluid, an ejection control unit that controls the ejection of the fluid from the fluid ejection unit, a fluid container that accommodates the fluid to be supplied to the fluid ejection unit, and a pressure adjustment unit that adjusts an inner pressure of the fluid container in such a manner that the inner pressure of the fluid container gets closer to a target pressure than a first threshold value for the inner pressure of the fluid container. When the inner pressure of the fluid container is closer to the target pressure than a second threshold value that is separated further from the target pressure than the first threshold value, the ejection control unit receives a demand for the ejection of the fluid.

Abstract: A fluid ejection device includes a fluid ejection unit that ejects a fluid and an ejection control unit that controls the ejection of the fluid. A fluid container accommodates the fluid supplied to the fluid ejection unit. A connection channel connects the fluid ejection unit and the fluid container. An opening and closing unit opens and closes the connection channel. A pressure adjustment unit controls the opening and closing unit and adjusts an inner pressure of the fluid container. The pressure adjustment unit increases the inner pressure higher than a predetermined pressure by instructing the opening and closing unit to close the connection channel and then instructing the opening and closing unit to open the connection channel after the inner pressure of the fluid container exceeds the predetermined pressure. The ejection control unit allows the fluid ejection unit to eject the fluid after the connection channel is opened.

Abstract: A fluid ejection device includes a fluid storing unit and a fluid outlet. A fluid pressing unit presses the fluid storing unit and causes fluid to flow from the fluid outlet. A connection pipe has an end that is connected to the fluid outlet. A fluid ejection unit ejects the fluid, which is received from a fluid intake port to which the other end of the connection pipe is connected, in a pulse-like manner according to a drive signal generated by a fluid-ejecting control unit. An ejecting-instruction input unit receives a fluid ejecting instruction. If the pressure in the fluid storing unit is equal to or higher than an upper limit value in a range determined with reference to a target pressure value, the drive signal is not generated. When the pressure in the fluid storing unit is lower than the upper limit value, the drive signal is generated.

Abstract: A fluid ejection device includes a fluid ejection unit that ejects a fluid and an ejection control unit that controls ejection of the fluid. A fluid container accommodates the fluid supplied to the fluid ejection unit. A pressure adjustment unit adjusts an inner pressure of the fluid container such that the inner pressure gets closer to a target pressure than a first threshold value. The ejection control unit has first and second ejection modes. In the first ejection mode, when the inner pressure is closer to the target pressure than a second threshold value separated from the target pressure farther than the first threshold value, the ejection control unit receives a demand for ejection of fluid. In the second ejection mode, even when the inner pressure is not closer to the target pressure than the second threshold value, the ejection control unit receives a demand for ejection of fluid.

Abstract: A fluid ejection device includes: a first processing unit that controls a fluid ejection unit configured to eject a fluid; and a second processing unit that controls a fluid supply unit configured to supply the fluid to the fluid ejection unit. The first processing unit confirms whether the second processing unit is in normal operation, and the second processing unit confirms whether the first processing unit is in normal operation, and when at least one of the first processing unit and the second processing unit confirms that the other is not in normal operation, the ejection of the fluid is prohibited.

Abstract: A fluid ejection device includes first and second fluid ejection units that eject fluid in a pulse-like manner according to first and second drive signals, respectively. A first fluid supplying unit supplies fluid to the first fluid ejection unit via a first channel. A second fluid supplying unit supplies fluid to the second fluid ejection unit via a second channel. A first fluid-ejecting control unit outputs the first drive signal after changing the fluid in the first channel to a predetermined state. A second fluid-ejecting control unit outputs the second drive signal after changing the fluid in the second channel to a predetermined state. A malfunction detecting unit detects malfunctions that might occur in the first fluid ejection unit, fluid supplying unit, channel, or fluid-ejecting control unit. When the malfunction is detected, the second fluid-ejecting control unit starts the second preparation operation.