Abstract: A substrate for a liquid jet recording head includes a plurality of built-in energy elements forming an array for generating thermal energy for ejecting liquid, built-in electrode wiring for supplying electric signals to the energy generating elements and first and second built-in temperature sensors disposed outside the array and adjacent opposite ends of the array for detecting a temperature of the substrate. First and second built-in heaters are disposed outside the array and adjacent opposite ends of the array for heating the substrate.

Abstract: Herein disclosed is a method for mutual transformation between the data of a light-source color on a color CRT monitor and the light-source color. The transformation can be performed by using any of the following two formulas:R.sub.c (.lambda.)=[I.sub.c (.lambda.)/I.sub.g (.lambda.)]R.sub.G (.lambda.);and ##EQU1## wherein: Both R.sub.c (.lambda.), and X, Y and Z express the non-luminous object color data which are designated at a spectral reflectance factor and the CIE tristimulas values, respectively; andBoth I.sub.c (.lambda.), and R.sub.c, G.sub.c and B.sub.c express the light-source color data, which are designated at a spectral distribution and the RGB video drive signals, respectively.Unknown parameters R.sub.G (.lambda.) and I.sub.G (.lambda.), and K.sub.R, K.sub.G and K.sub.

Abstract: An ink jet recording head comprises an ink discharging opening, a liquid pathway communicating with the ink discharging opening, a device for generating energy used to discharge ink provided along the liquid pathway, a first liquid chamber communicating with the liquid pathway, a second liquid chamber communicating with the first liquid chamber and provided only on the side of the liquid pathway opposite to the side on which the device for generating energy is provided and a pipe feeds ink to the second liquid chamber. A bag in the second liquid chamber forms a flexible space filled with air for absorbing each pressure fluctuation created in the first liquid chamber by actuation of the energy generating device and for preventing such fluctuation from propagating to the ink feeding pipe.

Abstract: A method of reproducing a signal from a magneto-optical recording medium is disclosed in which the medium is formed of a first magnetic film, a second magnetic film and a third magnetic film which are magnetically coupled to one another at room temperature T.sub.RT, wherein the Curie points Tc1, Tc2 and Tc3 of the first, second and third magnetic films are in the relationship of Tc2>T.sub.RT Tc2<Tc1, and Tc2<Tc3, and the coercive force Hc1 of the first magnetic film is small in the vicinity of the Curie point Tc2 of the second magnetic film, and the coercive form Hc3 of the third magnetic film is larger than a minimum required magnetic field intensity within a temperature range between the room temperature TRT and a predetermined temperature T.sub.PB which is higher than the Curie point Tc2 of the second magnetic film. A signal is reproduced from the magneto-optical recording medium by heating it to the predetermined temperature T.sub.

Abstract: A liquid jet apparatus comprises a recording head including a plurality of discharge ports for discharging the liquid therethrough, and a plurality of energy generating units respectively arranged correspondingly to the plural discharge ports for generating energy used for discharging the liquid. A driving unit is provided for driving the energy generating unit and has at least two selectable maximum driving frequencies, the driving unit being able to drive each energy generating unit at the maximum driving frequency. A drive control unit selects a maximum driving frequency from the selectable maximum frequencies.

Abstract: An ink jet recording apparatus comprises a discharge port for discharging the ink, a storing portion for storing the ink therein, a cap for covering said discharging port, pump means communicated with said cap, a sucking tube for communicating said cap with said storing portion and a valve provided in said sucking tube.

Abstract: A liquid injection recording apparatus includes a head having orifices provided to discharge liquid and form flying droplets, and energy generating members for generating energy utilized to form the droplets. Electrical contacts for inputting an electrical signal to the energy generating members are provided on a surface different from a surface in which the orifices are provided. The liquid injection recording apparatus has such liquid injection recording head mounted on a mounting portion on which is provided electrical contacts adapted to be connected to the electrical contacts of the recording head when the recording head is mounted on the mounting portion.

Abstract: An information recording medium wherein the recording layer consists of a thin film of a SbSe compound containing 58-85 atomic % Sb, with the balance Se. This material has been found to facilitate transformation from the crystalline state to the amorphous state or from the amorphous state to the crystalline state by means of laser ray irradiation, thereby rendering recording and erasing of information more practical.

Abstract: A liquid ejection recording head includes orifices provided to discharge liquid and form flying droplets, an energy generating member for generating energy utilized to form the droplets, and electrical contacts provided on the same side as a surface in which the orifices are provided for inputting an electrical signal to the energy generating member. The electrical contacts are provided above the orifices during the use of the head.

Abstract: A reflection-type optical recording medium which has a surface on which track guide grooves are formed and in which a layer of a recording material that has an increased energy reflection coefficient in a write portion. The track guide grooves are formed with a depth .phi..sub.0 so that improved efficiency results because of the selection of various parameters of the system.

Abstract: An optical information record member is provided which comprises a substrate, a first layer formed on the substrate made of a material having high absorptance of an incident light of a predetermined wavelength in which a part of the incident light is converted to heat, and a second layer formed on the first layer made of a material in which an optical characteristic for a light having a predetermined wavelength is changed by irradiation of the incident light together with the heat generated in the first layer, wherein an information signal can be recorded on the second layer by the change of the optical characteristic of the second layer.