摘要:
A thermal interface material (40) includes a silver colloid base (32), and an array of carbon nanotubes (22) disposed in the silver colloid base uniformly. The silver colloid base includes silver particles, boron nitride particles and polysynthetic oils. The silver colloid base has a first surface (42), and a second surface (44) opposite to the first surface. The carbon nanotubes are substantially parallel to each other, and extend from the first surface to the second surface. A method for manufacturing the thermal interface material includes the steps of: (a) forming an array of carbon nanotubes on a substrate; (b) immersing the carbon nanotubes in a silver colloid base; (c) solidifying the silver colloid base; and (d) peeling the solidified silver colloid base with the carbon nanotubes secured therein off from the substrate.
摘要:
A light guide plate (2) into which light beams are introduced from a light source has a light incident surface (21) receiving the light beams, a light emitting surface (22) transmitting the light beams therethrough, and a bottom surface (23) opposite to the light emitting surface. The light incident surface is between the bottom surface and the light emitting surface. The bottom surface has at least two sets of diffusing elements (231, 232) for diffusing and reflecting light beams toward the light emitting surface. Each set forms a continuous region at the bottom surface, and the at least two sets totally cover the bottom surface. The at least two sets of include diffusing elements that are formed along two different directions. By utilization of the at least two sets of diffusing elements, the light guide plate provides a uniform luminance over the whole of the light emitting surface.
摘要:
A light guide plate (300) for transmitting light beams from a light source to an LCD (liquid crystal display) includes: an incident surface (301) for introducing light beams into the light guide plate; an emitting surface (303) for uniformly transmitting light beams out from the light guide plate; and a bottom surface (302) opposite to the emitting surface for reflecting the light beams in directions toward the emitting surface. The light guide plate further provides a plurality of concavities (3031) on the emitting surface, for converging the light beams into the LCD. The light guide plate is a relatively simple, single integrated structure, and can obviate the need for a brightness layer in an associated LCD device.
摘要:
The present invention provides a direct type backlight module. The direct type backlight module includes at least one light source (220); and a diffusion board (230) having an incident surface (231) and an emitting surface (232). The at least one light source is arranged behind the incident surface. The diffusion board forms at least one first area (237) corresponding in shape to the contour of the at least one light source and at least one second area (236). Each type of area has a different concentration of fluorescent substance mixed therein. The brightness uniformity of the direct type backlight module can thus be improved.
摘要:
A structure of a film filter includes a plurality of film layers made of a film stack material and a substrate wafer which said film layers are deposited on at a temperature substantially higher than a room temperature and retained to after being cooled to the room temperature. The substrate wafer has a coefficient of thermal expansion greater than that of the film stack material so as to generate compressive forces upon the associated film layers, thus resulting in the film filter having a negative temperature drift coefficient.
摘要:
A surface light source (100) includes a light guide plate (20) and a pair of point light sources (10). The light guide plate has an incident surface (201) and an emitting surface (202). The point light sources are adjacent the incident surface of the light guide plate, for radiating light beams into the light guide plate through the incident surface. The emitting surface defines a plurality of polygonal cells (2020). Each of the polygonal cells define a plurality of grooves regularly therein. By the cooperation of the polygonal cells and the point light sources, the surface light source has uniform luminance over the whole emitting surface.
摘要:
A light guide plate (20) includes a light input end (21), a light output face (23) adjacent the light input end, and a back face (22) opposite to the light output face. A plurality of fine dots (26) are formed on the back face arranged in a uniform, rectangular array. The dots in a same column have a same size. The dots in a same row increase in size. A radius r of the dots in each row thereof varies as a function of a column number X of a given dot, in accordance with the formula: r=A+BX+CX2+DX3+EX4+FX5, wherein: the column number X varies in consecutive whole numbers from a value of one for the column nearest the light input end to a maximum value for the column most distal from the light input end; and A, B, C, D, E, and F are constants.
摘要:
A heat conductive pipe (1) includes a heat conductive body (3), a quantity of working fluid (4) contained in the body, and a chamber (610). The body defines a first end and a second end. The chamber is located at one end of the body. The volume of the chamber is changeable under control, wherein the working fluid flows from the first end to the second end when the volume is increasing and the working fluid flows from the second end to the first end when the volume is decreasing.
摘要:
A surface light source (100) includes a light guide plate (20) and a pair of point light sources (10). The light guide plate has an incident surface (201) and an emitting surface (202). The point light sources are adjacent the incident surface of the light guide plate, for radiating light beams into the light guide plate through the incident surface. The emitting surface defines a plurality of polygonal cells (2020). Each of the polygonal cells define a plurality of grooves regularly therein. By the cooperation of the polygonal cells and the point light sources, the surface light source has uniform luminance over the whole emitting surface.
摘要:
A heat sink (11) includes a base (12), a plurality of fins (14) extending from a first surface of the base, and a plurality of carbon nanotubes (18) formed on an opposite second surface (16) of the base. The carbon nanotubes are substantially parallel to each other and substantially perpendicular to the base. A method for manufacturing the heat sink includes the steps of: (a) providing a heat sink preform comprising a base and a plurality of fins extending from a first surface of the base; (b) polishing an opposite second surface of base; (c) depositing a catalyst film on the second surface of the base; and (d) providing a carbon source gas to grow a plurality of carbon nanotubes on the second surface of the base.