Abstract: Provided are an apparatus and method for character recognition that analyze three-dimensional motion of a user using an acceleration sensor and thereby perform character input and character recognition. The apparatus and method easily discern each stroke on the basis of a direction of motion at the beginning portion and end portion of the stroke, and recognize a character using a combination of the strokes, thereby enabling realization of a small-sized motion-based character input system.

Abstract: A command input method makes use of a three-dimensional motion recognition device embodied with an inertia system and is particularly directed to extend the total number of inputable commands using initial posture information as well as movement pattern of a motion recognition device. The command input method includes the steps of: determining initial posture at start point when movement of the motion recognition device is generated; determining a pattern of the movement at the end of the movement; and deciding a command from the determined initial posture and the movement pattern. Since the three-dimensional spatial motion can be further differentiated into different commands by the initial posture of the input device, the command input system can be simplified in structure with less number of recognizable motions.

Abstract: The invention relates to yellow phosphor with a red wavelength region thereof reinforced and a white light emitting device incorporating the same. The yellow phosphor has a formula of Mx(Al, Ga)5O12:Cey,Euz, in which M is at least one selected from a group consisting of Tb, Y, Gd, La and Sm, where 2.4?x?2.998, 0.001?y?0.3 and 0.001?z?0.3.

Abstract: The present invention relates to phosphor blend for wavelength conversion and a white light emitting device using the same. The phosphor blend of the invention comprises three phosphors, A5 (PO4)3Cl:Eu2+, D2SiO4:Eu, and MS:Eu at a composition where near ultraviolet radiation is converted into light positioned at a CIE coordinate (x, y),where 0.25?x?0.45 and 0.25?x?0.43, wherein A comprises at least one of Sr, Ca, Ba, and Mg, D comprises at least one of Ba, Sr, and Ca, and M comprises at least one of Sr and Ca. Furthermore, the present invention provides a new white light emitting device in combination of the phosphor blend and a near ultraviolet LED.

Abstract: The present invention relates to a surface coating method of a sulphide phosphor and thereby coated sulphide phosphor. The surface coating method includes preparing sulphide phosphor powder, applying silane modifier to the sulphide phosphor to form an organic polymer film containing silicon on the surface of the sulphide phosphor. The method further includes heat-treating the sulphide phosphor powder to obtain a silicon oxide film from the organic polymer film.

Abstract: The present invention provides a phosphor blend for wavelength conversion and a white light emitting device using the phosphor blend. Further disclosed is a white light emitting phosphor blend comprising 0.5˜18 wt % of A5(PO4)3Cl:Eu2+ (where A is at least one element selected from Sr, Ca, Ba and Mg), 0.7˜14 wt of D2SiO4:Eu (where D is at least one element selected from Ba, Sr and Ca), and 68˜98.5 wt % of G5EuS(WO4)2.5+1.5S:Sm (where G is at least one element selected from Li, Na and K; and s is a number between 1 and 5), based on the total weight of the phosphor blend.