Abstract: An air conditioner includes an outdoor unit, a plurality of indoor units, a plurality of expansion valves which are provided upstream of indoor heat exchangers, a plurality of on-off valves which are provided upstream of the expansion valves, and control unit wherein when the indoor units include a stopping indoor unit and an operating indoor unit currently operating, and when a stopping of the stopping unit is due to thermostat-off operation, the control unit performs a procedure to stop the stopping unit, the procedure including closing an on-off valve that corresponds to the stopping unit and driving an indoor fan in the stopping unit until pressure in a part between the on-off valve and an expansion valve that corresponds to the stopping unit and pressure in a part downstream of the first expansion valve are equalized, fully opening the expansion valve, and stopping the indoor fan.

Abstract: An outdoor unit control unit includes a degree-of-dryness calculating unit that calculates the degree of dryness of a refrigerant flowing into an heat exchanger (an indoor heat exchanger at the time of a cooling operation, and an outdoor heat exchanger at the time of a heating operation) disposed on the downstream side of a liquid pipe, and performs an inhibition mode of inhibiting, when the degree of dryness exceeds a threshold A, control that is performed in the direction of decreasing the degree of opening of the expansion valve (an indoor expansion valve at the time of the cooling operation, and an outdoor expansion valve at the time of the heating operation) disposed on the upstream side of the liquid pipe.

Abstract: An air conditioner includes an outdoor unit, a plurality of indoor units, a plurality of expansion valves which are provided upstream of indoor heat exchangers, a plurality of on-off valves which are provided upstream of the expansion valves, and control unit wherein when the indoor units include a stopping indoor unit and an operating indoor unit currently operating, and when a stopping of the stopping unit is due to thermostat-off operation, the control unit performs a procedure to stop the stopping unit, the procedure including closing an on-off valve that corresponds to the stopping unit and driving an indoor fan in the stopping unit until pressure in a part between the on-off valve and an expansion valve that corresponds to the stopping unit and pressure in a part downstream of the first expansion valve are equalized, fully opening the expansion valve, and stopping the indoor fan.

Abstract: An image processing apparatus, includes: a first storage unit configured to store first correction data reducing brightness unevenness corresponding to a first gradation value; a second storage unit configured to store second correction data reducing brightness unevenness corresponding to a second gradation value which is lower than the first gradation value; and a correction unit configured to correct gradation values, which are not less than the first gradation value, of the input image data, in use of at least the first correction data, and corrects gradation values, which are less than the first gradation value, of the input image data, in use of at least the second correction data.

Abstract: An image processing apparatus, includes: a first storage unit configured to store first correction data reducing brightness unevenness corresponding to a first gradation value; a second storage unit configured to store second correction data reducing brightness unevenness corresponding to a second gradation value which is lower than the first gradation value; and a correction unit configured to correct gradation values, which are not less than the first gradation value, of the input image data, in use of at least the first correction data, and corrects gradation values, which are less than the first gradation value, of the input image data, in use of at least the second correction data.

Abstract: For decreasing hardware for correction to compensate for decrease of luminance due to decrease in drive voltage of devices, a plurality of electron-emitting devices are arranged in a matrix pattern and wired by a plurality of row and column lines, a column wiring driving unit applies voltage pulses to the column lines, and row wiring driving units apply voltages to the row lines to switch a row to be selected. The image signal processing unit divides a luminance level of an image signal into plural areas in the signal amplitude direction in response to each split timing signal. There are provided means for detecting frequencies of luminance signals included in the respective amplitude areas, a correction quantity calculating unit for outputting correction signals based on the detected values, and an adding unit for adding the correction signals and luminance signals, which outputs results of addition as electron emission requirements to the column wiring driving unit.

Abstract: The present invention relates to an image display apparatus for forming an image with a plurality of luminescent spots to be precisely aligned in a matrix. For example, a spacer disposed between an electron source and a face plate causes luminescent spots on the face plate spaced unevenly. The luminescent spots spaced unevenly will produce a visual unevenness in luminance which deteriorates the quality of produced image. By modifying the quantity of light of luminescent spots spaced unevenly, the visual unevenness in luminance is compensated.

Abstract: An image display apparatus includes a plurality of display devices, a plurality of scan interconnections and a plurality of modulation interconnections, a scanning circuit for applying a scanning signal to the scan interconnections, and a modulation circuit for applying a modulation signal to the modulation interconnections. The scanning circuit applies the scanning signals to a group of scan interconnections selected from the plurality of scan interconnections in one select period, and applies the scanning signals, in a subsequent select period, to the plurality of scanning interconnections which were shifted with one scan interconnection portion from the group of scanning interconnections to which the scanning signals were applied in a previous select period.

Abstract: An image display apparatus according to the present invention includes: n of scanning lines, n being an integer of 3 or greater; a scanning circuit that outputs a selection signal for sequentially selecting scanning lines from the n of scanning lines in each transitional selection period, light being to be emitted onto the selected scanning lines; a plurality of display devices that are to form a plurality of pixels that form the plurality of scanning lines; an evaluation circuit that outputs an evaluation value corresponding to the brightness of an image formed by the pixels of each of the plurality of display devices; and a control circuit that changes scanning conditions in the scanning circuit in accordance with the evaluation value, so that the ratio of the total time in term of a unit time of the time when each of the n of scanning lines being selected during the selection periods to the unit time is changed.

Abstract: Power source control pertaining to a plurality of control units is made to be easy. Moreover, the productivity and the versatility of a control program are improved. A logical operation unit performing a logical operation of a power source control signal outputted from each control unit is provided. The power supply state of a power source is determined in accordance with an operation result outputted from the logical operation unit.

Abstract: This invention discloses an arrangement allowing connection of various kinds of image displays to one supply source in an image display control system having a supply source for transmitting a signal including at least a video signal, and an image display for receiving the signal and displaying a corresponding image. The supply source acquires characteristic data of the image display when it is powered on, determines a signal communication specification with the image display based on the acquired characteristic data, and communicates a signal including the video signal with the determined communication specification. The image display transmits characteristic data for specifying the characteristics of the image display to the supply source, and communicates the signal including the video signal in accordance with the determined communication specification. This invention also discloses an arrangement permitting changing the specifications and version of the control program of the image display.

Abstract: A modulation circuit that outputs modulation signals, comprising: a memory circuit that stores waveform data that determines the time width of a portion of a modulation signal, the portion being adjusted to a predetermined amplitude value, the waveform data being stored in such a manner as to output a plurality of modulation signals; and a circuit that generates the modulation signals, based on the waveform data and input gradation data.

Abstract: An image display apparatus includes a plurality of display devices wired in a matrix through a plurality of scanning signal wirings and a plurality of modulated signal wirings, and a driving circuit for applying a modulated signal having a pulsewidth corresponding to an image signal to each of the plurality of modulated signal wirings. The driving circuit causes the modulated signal to fall in discrete decrements to a non-display state from a display state.

Abstract: An image forming apparatus having a display panel with 1,920×480 electron-emitting devices arranged in a matrix and a plurality of fluorescent substances for emitting light by electrons emitted by these electron-emitting devices includes, as one of circuits for driving the display panel, an I/P converter for converting an interlaced scanning signal input at an NTSC image frame rate by a double frame rate and converting the signal into a non-interlaced scanning signal. The signal is controlled to define the maximum time interval during which the fluorescent substances are continuously irradiated with electrons from the electron-emitting devices in units of rows in line-sequential scanning, so as not to substantially degrade the linearity of the luminance characteristic of the fluorescent substances that changes depending on an electron irradiation time for the fluorescent substances.

Abstract: A display apparatus includes a display panel having a plurality of display elements, and a display controller for controlling the display panel in a normal display mode, a first power saving mode, a second power saving mode and a third power saving mode. A mode transition device causes the display panel to shift to the first power saving mode or the third power saving mode from a normal mode based on an instruction of a user, and causes the display panel to shift to the second power saving mode from the normal mode based on status of the display panel.

Abstract: This invention discloses an arrangement for suppressing an erroneous display and suppressing damage to an image display apparatus when a power source is turned on, the power source is turned off, an outlet is removed, or power fails. Particularly, this invention discloses an arrangement for stopping, for a predetermined time, input of a scanning signal or modulation signal to a display panel or application of an accelerating potential in turning on the power source. This invention discloses an arrangement for stopping input of a scanning signal or modulation signal to the display panel, and then stopping supply of power in turning off the power source.

Abstract: A scanning wiring driving unit for generating a signal of a frequency Fb applies a scanning signal to a plurality of scanning wirings which are a part of a plurality of scanning wirings. In a next selection period following a predetermined selection period, by shifting by a portion of the scanning wiring to which the scanning signal was applied in a previous stage, a scanning signal is applied to a plurality of scanning wirings. Further, in any one of the selection periods, a scanning signal is applied to a plurality of scanning wirings simultaneously, and n pieces of scanning wirings are sequentially scanned by use of a frequency of n X Fb and below.

Abstract: An image display apparatus includes an image display member having a plurality of light-emitting portions, electron-emitting devices for emitting electrons and causing the light-emitting portions to emit light in accordance with an input image signal, and an adjustment unit for differentially adjusting the light emitting brightness for the plurality of light-emitting portions at different positions of the image display member, when an input image signal designates the same brightness for the plurality of light-emitting portions.

Abstract: Improved is luminance of an image display apparatus in which a display panel is configured by a matrix wired plurality of electron emitting devices, and long life thereof is tried to be realized. In one select period, a scanning signal is applied to a plurality of scan interconnection. In a subsequent select period, a scanning signal is applied to a plurality of scan interconnections which were shifted with one scan interconnection portion. Between scanning signals, a low level portion is disposed. Also, pulse width modulation is carried out.

Abstract: An image display apparatus includes a display panel configured by a matrix wired plurality of electron emitting devices. In one select period, a scanning signal is applied to a plurality of scan interconnections. In a subsequent select period, a scanning signal is applied to a plurality of scan interconnections which were shifted with one scan interconnection portion. Between scanning signals, a signal level is controlled to a non-selection electric potential.