350results about How to "Avoid discontinuities" patented technology

A light guide with input and output faces 2, 3a is polar-symmetric about the first face 2 and has optical properties such that the angle at which a ray is injected into the first face determines the position at which it leaves the second face 3a, or, if operated in the reverse direction, the position at which the ray enters the second face determines the angle at which the ray leaves the second face. The light guide includes a tapered transparent sheet 3, light from the first face entering at the thick end of this sheet, and the second face forming one face of the tapered sheet. An input / output slab 4 adjoins the tapered sheet 3 for fan-out of light from the first face 2 to the tapered sheet, and a transition region 8 is located between flat and tapered sheets. The polar symmetry means that light rays always travel in line with the taper direction, which suppresses banding. Preferably the light guide further includes a prism device 20 for folding the light so that the flat and tapered sheets can be folded over each other. A method of making such a prism is also disclosed.

In an EL element having an anode, an insulating film (bump) formed on the anode, and an EL film and a cathode formed on the insulating film, each of a bottom end portion and a top end portion of the insulating film is formed so as to have a curved surface. The taper angle of a central portion of the insulating film is set within the range from 35° to 70°, thereby preventing the gradient of the film forming surface on which the EL film and the cathode are to be formed from being abruptly changed. On the thus-formed film forming surface, the EL film and the cathode can be formed so as to be uniform in thickness, so that occurrence of discontinuity in each of EL film and the cathode is prevented.

A method converts an input pixel (IPi) defined by three values (ri, gi, bi) of input primaries (RI, GI, BI) into N drive values (DSi) for driving N sub-pixels (SPi) of a pixel (PIi) of a display device (DD). The N drive values (DSi) have a valid range (VR) wherein their values occur. The N sub-pixels (SPi) emit light defined by N display primaries (DPi) of which at least four are independent. M resulting display primaries (RDi) are used (10) wherein a group of ones of the N display primaries (DPi) which are combined into a combined display primary (CDi) are replaced by the combined display primary (CDi). A first multi-primary conversion (MPC1) is performed (11) on the input pixel (IPi) to obtain resulting drive values (DRi) for the M resulting display primaries (RDi). It is checked (12) whether the M resulting drive values (DRi) have values in the valid range (VR). If the resulting drive value (DRi) of at least one of the M resulting display primaries (RDi) has a value outside the valid range (VR) the method allocates (12) a fixed value (FVi) to the resulting drive value (DRi) outside the valid range (VR), and selects (13) K out of the N display primaries (DPi). The selection includes the ones of the N display primaries (DPi) which were combined into a combined display primary (CDi) but not the display primaries (DPi) associated with the resulting drive value (DRi) outside the valid range (VR). The integer K is larger than 3. Finally the method performs (14) a second multi-primary conversion under a constraint (CO2) for the ones of the N display primaries (DPi) being combined into a combined display primary (CDi) in the first multi-primary conversion (MPC1).

In order to quickly update map data in region units without generation of contradiction to adjacent non-updated regions after the updating, under map data updating, time and date of updating of update region of a terminal is obtained with designation of a region as the update object used as a trigger, a mesh ID on the external boundary of the partial update region is obtained, and the differential updating data ID of the updated differential updating data is also obtained from the terminal. The partial updating data and differential updating data required for updating of the designated region of the terminal are selected from the information obtained above and these selected data are applied to the map data of terminal. When updating is conducted using the partial updating data and differential updating data, the time and date of updating of the relevant partial update region ID are changed and the differential updating data ID is registered to the differential management data.