摘要:
Solid optical guide (10) with microprisms (20) of refractive index n, for uniformly illuminating a surface (4) in grazing incidence at an angle &thgr;1 in which a plane angle &dgr; of the cross-section develops with respect to the surface (4) a substantially perpendicular face (15) and a substantially parallel face (14), in which microprisms (20) are structured in hollows, one facet (21) of said microprisms oriented towards the face (15) has its edge (22) formed with the parallel face (14) inclined at an angle {right arrow over (&agr;)} with respect to the axis of the guide and its edge (23) formed with the perpendicular face (15) inclined at an angle {right arrow over (&ggr;)} with respect to the perpendicular to the surface to be illuminated, the values {right arrow over (&agr;)} and {right arrow over (&ggr;)} being determined from characteristics n, &thgr;1 and &dgr; of the guide.
摘要:
Illumination device for the dial (4) of a display device formed by a case (1) sealed by a crystal (8) arranged above the dial (4) and held by a fitting ring (9), said device including at least one light source (13, 33, 35, 43, 53) arranged in at least one recess arranged in at least one light guide (20, 30, 40, 50) positioned at the periphery of the dial (4), said guide having a polished internal surface (21) oriented towards the dial (4) and an external surface (22) held in a space delimited by the dial (4), the crystal (8) and the inner wall (10) of the fitting ring (9), characterised in that all or part of said external surface (22) of the guide is arranged to allow a progressive increase along the guide (20, 30, 40, 50) of the quantity of light diffused by said external wall gradually as one moves away from one of the light sources (13, 33, 35, 43, 53).
摘要:
A method for manufacturing a plurality of electro-optic cells is disclosed, in particular for manufacturing liquid crystal display cells (2) or photovoltaic cells, each cell including a cavity (5) filled with a liquid and defined by sealed partitions (8, 9) between two plates (3, 4), in particular made of glass, provided with electrodes within the cavity. In a first step, a batch of cells (2) is manufactured, whose cavities are filled with the desired liquid and sealed. In a second step, the external contour (20) of each cell is cut, and if necessary a hole (10) passing through the cell, by means of a very high pressure water jet (30), the water either being loaded or not with an abrasive agent. Thus, the external layers (25, 26) such as a polarizer and a reflector may be applied onto the batch prior to the cutting step.
摘要:
The invention relates to a watch comprising a device for indicating the temperature (16) of the environment in which the watch is situated comprising a first series of thermochromic liquid crystal temperature sensors (18) facing a first temperature scale (20) arranged in such a way that the reading given by the sensors (18) of the first series, in combination with said scale, is directly representative of the temperature of the environment in contact with the sensors, and wherein the device differentiates the temperature indicated by the sensors according to whether the watch is worn or not worn.
摘要:
An optical device (20) is provided using at least one film (23) of cholesteric liquid crystal to reflect at least one predetermined wavelength band from an incident light. This device is characterized in that a non zero birefringence gradient is present in a portion or the entire thickness of said film. The gradient may be obtained in particular by superposing layers (24a-24j) having increasing or decreasing respective birefringence coefficients. The birefringence gradient has the effect of removing the lateral bands of the reflection spectrum, hence making the color of the reflected light more brilliant and more saturated. The effect is particularly advantageous in the case of the color red, for which the lateral band located on the yellow side is perceived strongly by the human eye.
摘要:
A temperature indicator has a substrate (1) comprising several distinct juxtaposed zones (I to VIII), each being covered by a first thermosensitive material (A) and at least one second thermosensitive material (B, C) each of which reacts within a predetermined temperature range which is different for each zone but of constant scope. There is no overlapping of the temperature ranges of each material is within each zone. Each of the thermosensitive materials (A,B,C) has a portion of its range of reaction temperatures in common with a portion of the temperature range of one of the materials (A,B,C) of an adjacent zone. This overlapping is lower by one step in each of the temperature ranges. With three thermosensitive materials per zone, 24 sensing elements are available, which enables obtaining 18 times a single non-active sensor, namely 18 temperatures at the step resolution. The temperature is read at the side of the non-active zone.
摘要:
Device producing an aesthetic effect by means of a field-effect or charge-effect optical shutter (5), allowing, by the switching of a power source (8), a colored decorative design (11) printed onto a non Lambertian optimized diffuse reflector (12), placed against the back face (5a) of the optical shutter, to be uncovered or masked; timepiece wherein the dial is formed wholly or partly by such a device.
摘要:
The invention concerns a liquid crystal display device intended, in particular, to form a colour image display screen, of the type including: a first substrate which is transparent on a front side situated on the side of the viewer; and a second substrate arranged on a back side facing the first substrate and extending parallel to the latter. The first substrate is connected to the second substrate in order to delimit between them a cavity in which at least one film of liquid crystal is arranged. The liquid crystal has at least a first state in which it reflects the light of a range of wavelengths of a predetermined colour and at least a second state in which it is transparent. The surface of each substrate facing the other substrate includes electrodes to allow the liquid crystal to pass at least from the first state to the second state or conversely, by selective application of a control voltage to the electrodes. The liquid crystal display includes a filter absorbing at least the visible neighbouring wavelengths of the range of wavelengths of the predetermined colour and the closest to the wavelength 555 nm with the exception of the wavelengths of said predetermined colour. The filter is arranged on the side of the viewer with respect to the film of liquid crystal.
摘要:
The present invention relates to a method of making a timepiece plate. This method is characterized in that it includes the following steps: a) taking (A1, A2) the material forming the plate including at least one metallic element; b) forming (B1, B2) the plate; c) cooling (C) everything so as to obtain the timepiece plate in an at least partially amorphous state; and d) retrieving (D) the plate.
摘要:
Nanocomposites of conductive, nanoparticulate polymer and electronically active material, in particular PEDOT and LiFePO4, were found to be significantly better compared to bare and carbon coated LiFePO4 in carbon black and graphite filled non conducting binder. The conductive polymer containing composite outperformed the other two samples. The performance of PEDOT composite was especially better in the high current regime with capacity retention of 82% after 200 cycles. Further improvement can be obtained if the porosity of the nanocomposites is enhanced. Hence an electrode produced from a composite made of conductive, nanoparticulate polymer, electronically active material, and sacrificial polymer, wherein the sacrificial polymer has been removed leaving pores has improved electrolyte and ion diffusion properties allowing the production of thicker electrodes.