Abstract: A battery diagnosis apparatus for diagnosing a battery including battery cells, the apparatus according to an embodiment may include a voltage measurer for measuring the voltage of each battery cell during a preset period of time, a voltage variation calculator for calculating an individual voltage variation of each battery cell during the preset period of time, an average voltage variation calculator for calculating an average voltage variation of the battery cells during the preset period of time, and an abnormality detector for determining that a voltage abnormality has occurred in at least one battery cell among the battery cells when a difference between the voltage variation of the at least one battery cell and the average voltage variation of the at least one battery cell is greater than a threshold value.

Abstract: This invention relates to an irreversible indicator for detecting oxidizing agents, or in particular an oxygen indicator, comprising at least one redox-sensitive dyestuff, at least one semiconductor material and at least one electron donor. This indicator is activated by exposure to light of about 200-400 nm. The invention also relates to UV light detector.

Abstract: This invention relates to an indicator for detecting a photocatalyst wherein the indicator comprises at least one redox-sensitive material and either at least one electron donor or at least one electron acceptor. The invention also relates to a method for detecting a photocatalyst using an indicator. In particular, the photocatalyst may be a semiconductor such as titanium dioxide on a glass substrate.

Abstract: The present invention relates to a color cathode ray tube and electron gun, and more particularly, to a color cathode ray tube and electron gun to improve deflection aberration efficiently using magnetic material formed at the electron gun and to improve a resolution of a display screen.

Abstract: This invention relates to an irreversible indicator for detecting oxidising agents, or in particular an oxygen indicator, comprising at least one redox-sensitive dyestuff, at least one semiconductor material and at least one electron donor. This indicator is activated by exposure to light of about 200-400 nm. The invention also relates to UV light detector.

Abstract: Disclosed is an electron gun for a cathode ray tube capable of improving substantial resolution by improving the alignment of a triode portion. The electron gun includes a triode portion composed of at least one cathode for emitting electron beams, and a first electrode and a second electrode for controlling emission amount of the electron beams, a focus electrode and an anode electrode forming a prime lens for focusing the electron beams on a screen, and at least two guide holes housed in more than two electrodes for use of assembly besides electron beam passage holes, in which at least one guide hole is circular and at least one of the other guide holes is non-circular.

Abstract: Disclosed is an electron gun for a cathode ray tube capable of improving substantial resolution by improving the alignment of a triode portion. The electron gun includes a triode portion composed of at least one cathode for emitting electron beams, and a first electrode and a second electrode for controlling emission amount of the electron beams, a focus electrode and an anode electrode forming a prime lens for focusing the electron beams on a screen, and at least two guide holes housed in more than two electrodes for use of assembly besides electron beam passage holes, in which at least one guide hole is circular and at least one of the other guide holes is non-circular.

Abstract: In-line type electron gun in a color cathode ray tube including a pre-focusing lens part having at least two electrodes for focusing electron beams, a main lens part having two, or more than two electrodes for focusing the electron beams onto a screen, and at least one electrostatic field controlling electrode in the electrodes of the main lens part having a center electron beam pass through hole and two outer electron beam pass through holes, wherein each of the outer electron beam pass through holes has a form a circular hole and a rectangular hole are combined therein, the rectangular hole having a height ‘V2’ greater than a vertical diameter ‘V1’ of the center beam pass through hole of the electrostatic field controlling electrode, thereby permitting an excellent focusing and improving assembly work.

Abstract: The present invention relates to a type of portable emergency power supply for use when storage batteries of mobile appliances such as cellular telephones, radios, camcorders, laptops and mini cassette players are discharged or become unusable. In particular, by utilizing solar cells, the present invention can supply power to mobile phones, laptops and mini cassette players and other devices during the daytime when the sun shines. The present invention provides a portable multi-voltage power source device that is capable of generating various levels of power voltages for diverse appliances requiring different electric voltages. The present invention includes at least one solar cell plate formed of a plurality of solar cells connected to each other and a power source selection unit to select one of a plurality of voltages by coupling the positive and negative poles of the connected solar cells in selected fashions.

Abstract: In-line type electron gun in a color cathode ray tube including a pre-focusing lens part having at least two electrodes for focusing electron beams, a main lens part having two, or more than two electrodes for focusing the electron beams onto a screen, and at least one electrostatic field controlling electrode in the electrodes of the main lens part having a center electron beam pass through hole and two outer electron beam pass through holes, wherein each of the outer electron beam pass through holes has a form a circular hole and a rectangular hole are combined therein, the rectangular hole having a height ‘V2’ greater than a vertical diameter ‘V1’ of the center beam pass through hole of the electrostatic field controlling electrode, thereby permitting an excellent focusing and improving assembly work.

Abstract: Electron guns for color picture tube capable of strengthening the refracting action of electrostatic prisms and of overcoming possible distortion of three electron beams at about the periphery of a screen due to strong nonuniform magnetic field are disclosed. The electron guns has variable asymmetric electrostatic lenses, which lenses include first and second focusing electrodes, a first electrostatic deflection electrode mounted to the first focusing electrode, a second electrostatic deflection electrode mounted to the second focusing electrode, and an accelerating electrode placed in front of the second focusing electrode. In another embodiment, the variable asymmetric electrostatic lenses of the electron guns includes electrostatic deflection means placed between the first and second focusing electrodes.

Abstract: An electron gun of a color picture tube which can make uniform beam spots on a screen by eliminating astigmation of electron beams caused by a self-convergence yoke is constructed by the use of the improved shapes of vertical blades or horizontal blades of astigmation correction electrodes.