Abstract: A silver halide color photographic material comprising a support having thereon at least one blue-sensitive silver halide emulsion layer, wherein said blue-sensitive silver halide emulsion layer contains at least one yellow dye forming coupler represented by the following general formula (1) or (2), and at least one yellow dye forming coupler represented by the following general formula (F): ##STR1## wherein X.sub.1 and X.sub.2 each represents an alkyl group, an aryl group or a heterocyclic group; X.sub.3 represents an organic residue which forms a nitrogen-containing heterocyclic group together with >N--; Y represents an aryl group or a heterocyclic group; and Z represents a group which is capable of being released when the coupler of general formula (1) or (2) reacts with an oxidation product of a developing agent; ##STR2## wherein R.sub.20 represents a tertiary alkyl group; R.sub.21 represents a hydrogen atom, a halogen atom, an alkoxy group, an aryloxy group, an alkyl group or a dialkylamino group; R.

Abstract: There is disclosed a silver halide color photographic material comprising a photosensitive silver halide emulsion layer that contains an acylacetamide yellow dye-forming coupler whose acyl group is represented by formula (Y-I) and a compound represented formula (I). ##STR1## wherein R.sub.1 represents a monovalent group, O represents a group of nonmetallic atoms required to form together with C a 3- to 5-membered hydrocarbon ring or a 3- to 5-membered heterocyclic ring that contains a hetero atom selected from the group consisting of N, O, S, and P, provided that R.sub.1 is not a hydrogen atom and it does not bond to Q to form a ring. ##STR2## wherein A represents an oxidation-reduction (redox) residue or its precursor, which is an atomic group that allows --Time).sub.

Abstract: A silver halide color photographic material is provided comprising on a support at least one silver halide emulsion layer containing at least one of the compounds represented by formulae (I) to (III): ##STR1## wherein R.sub.11 represents ##STR2## in which R.sub.13 represents an alkyl, aryl or heterocyclic group, and R.sub.14 and R.sub.15 each represents hydrogen, alkyl group or aryl group; R.sub.12 represents a substituent having a Hammett's substituent constant .sigma.p of 0.3 or less; n represents an integer 0 to 2, and when n is 2, the two R.sub.12 's may be the same or different; B represents a group which releases PUG after being separated from a hydroquinone nucleus; PUG represents a development inhibitor; l represents an integer; and A and A' each represents hydrogen or a group capable of being removed by an alkali; R.sub.11 and R.sub.12, R.sub.11 and A or A', R.sub.12 and A or A', and two R.sub.12 's may together form a ring; ##STR3## wherein Q.sup.

Abstract: An image forming device having an electron beam generating device is provided which comprises a plural number of electron beam generating sections and a deflecting means capable of deflecting the group of electron beams emitted from this electron beam generating device in the two directions of X and Y.

Abstract: A multi-chamber inclined ball mill comprises a base, a frame-shaped support member rotatably supported on the base, and a grinding chamber rotatably supported on the frame-shaped support member. The grinding chamber is constituted of at least three cylindrical chambers each provided with outwardly tapered protrusions at its opposite ends and the cylindrical chambers integrally formed so that their longitudinal axes mutually intersect at the centers thereof and form a common grinding space at their region of intersection. The grinding chamber is supported on the frame-shaped support member such that the longitudinal axes of the cylindrical chambers intersect the axis of rotation of the frame-shaped support member at a single point and at one and the same angle.

Abstract: A direct positive photographic light-sensitive material comprising a support having thereon at least one internal latent image type silver halide emulsion layer not having been previously fogged, wherein the photographic light-sensitive material contains at least one nucleating agent represented by a specific formula and at least one nucleating accelerating agent selected from compounds represented by two specific formulae. The direct positive photographic light-sensitive material according to the present invention provides direct positive images having a high maximum image density and a low minimum image density, and is less susceptible to change in photographic properties such as reduction in the maximum image density and increase in the minimum image density when it is preserved under high temperature and/or high humidity conditions.

Abstract: A display device has an electron ray generating unit of matrix electrode structure in which a plurality of cold cathodes generating electron rays are arranged two-dimensionally, image storing apparatus for storing therein image information as an amount of charges by a variation in a surface potential produced by the application of the electron rays from the electron ray generating unit, and a display for receiving the application of the electron rays applied from the electron ray generating unit and modulated by the electric charge stored in the image storing apparatus and visualizing the image information.

Abstract: A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide photographic emulsion layer, wherein at least one layer selected from the emulsion layer and other hydrophilic colloid layers contains at least one alkynyl substituted heterocyclic quaternary ammonium salt represented by the following general formula (I): ##STR1## wherein Z represents a non-metallic atomic group necessary to form a substituted or unsubstituted 5-membered or 6-membered heterocyclic ring to which a aromatic ring or a heterocyclic ring may further be condensed; R.sup.1 represents a substituted or unsubstituted aliphatic group; X represents ##STR2## Q represents a non-metallic atomic group necessary to form a substituted or unsubstituted 4-membered to 12-membered non-aromatic hydrocarbon ring or substituted or unsubstituted non-aromatic heterocyclic ring; at least one of R.sup.

Abstract: An optical modulation device includes: a ferroelectric liquid crystal disposed between a pair of substrates; provision for applying an alternating voltage sufficient to render the ferroelectric liquid crystal turbid; and provision for superposing a DC voltage on the alternating voltage. A portion of the ferroelectric liquid crystal rendered turbid through the application of an alternating voltage is selectively caused to have an increased transmittance when superposed with a DC voltage.

Abstract: An ink-jet head driver comprises: a pressure chamber filled with a recording liquid; a piezo-electric element as electrical/mechanical transducing means for enlarging the capacity of the pressure chamber at a first stage and contracting it in a second stage into the state before enlargement, thereby emitting the recording liquid; and a device for adjusting the time interval between the first and second stages to adjust the emitting velocity. The capacity of the pressure chamber is changed due to charge and discharge by a charging/discharging circuit, and charge/discharge time constants of this circuit are selectively controlled by a control unit. According to this driver, mixture of air into recording liquid in the ink-jet head when the piezo-electric element is expanded is prevented, and a variable range of a dot diameter of the recording liquid droplet can be extended, thereby improving recording quality.

Abstract: An image-recording apparatus which comprises:(a) an image-recording medium comprising a pair of substrates and a thermo-optical liquid crystal provided between the pair of the substrates,(b) a heating means for uniformly heating the liquid crystal up to obtain an isotropic phase,(c) a means for applying an electrical field to the liquid crystal, and(d) a writing means for conducting writing by locally heating the image-recording medium.

Abstract: An apparatus for driving a liquid jet head comprises: a piezoelectric element which mechanically deforms responsive to an electric signal; a pressure chamber whose volume varies due to the deformation of such element; a discharge port communicated with such chamber; 1st and 2nd charging circuits to charge such element at the same polarity; a discharging circuit to discharge such element; and a control unit for making the 1st charging circuit operative prior to the operation of the 2nd charging circuit. A charge time constant of the 1st charging circuit is set to be sufficiently long that no droplet is emitted. A charge time constant of the 2nd charging circuit is set to be shorter to emit a droplet from the discharge port. The surface tension of the meniscus and the contractive force due to the contraction of the pressure chamber act multiplicatively, so that it is possible to record a droplet of a small dot diameter.

Abstract: An image recording apparatus comprises ink jet recording heads; a carriage for moving and scanning those ink jet heads; and a data recording unit for recording character data such as the date and the like in a blank portion other than a image recording region of the recording medium by use of the ink jet heads which are in this blank portion while the carriage is scanning. The character data is recorded (generally in black) by at least the one ink jet head which is arranged at the endmost portion in the direction of arrangement of the ink jet heads. Since the character data can be recorded in the blank portion while the image is being recorded in the image recording region, the total recording time can be reduced.