Abstract: In some embodiments, the present disclosure relates to a wafer edge trimming apparatus that includes a processing chamber defined by chamber housing. Within the processing chamber is a wafer chuck configured to hold onto a wafer structure. Further, a blade is arranged near an edge of the wafer chuck and configured to remove an edge potion of the wafer structure and to define a new sidewall of the wafer structure. A laser sensor apparatus is configured to direct a laser beam directed toward a top surface of the wafer chuck. The laser sensor apparatus is configured to measure a parameter of an analysis area of the wafer structure. Control circuitry is to the laser sensor apparatus and the blade. The control circuitry is configured to start a damage prevention process when the parameter deviates from a predetermined threshold value by at least a predetermined shift value.

Abstract: A direct-lit type backlight source includes a backplate and a point light source array disposed on the backplate. A light output shape of a first optical lens employed by each of point light sources of corner regions of the point light source array and that of a second optical lens employed by each of a plurality of point light sources of the non-corner region are different. For instance, the light output shape of the first optical lens is symmetrical in a first direction and asymmetrical in a vertical second direction. Moreover, a liquid crystal television adopting the direct-lit type backlight source is provided. The light-output shape of the optical lens adopted by each of the point light sources of the respective corners is designed to illuminate the corners uncovered by light source in the prior art, which can improve optical uniformity of the corners.

Abstract: A fingerprint image acquisition device includes: a light source, a finger touching surface, a convex lens, an image sensor and a grating. The light source is a surface light source, and the grating is disposed on a light output surface of the light source. The light source is configured to emit a light beam, the grating is configured to change a propagation direction of the light beam to form a detection light beam, the finger touching surface is configured for a user to place a finger thereon to reflect the detection light beam and thereby obtain a reflected light beam, the convex lens is configured to focus the reflected light beam on the image sensor, and the image sensor is configured to generate a fingerprint image based on the focused reflected light beam. Accordingly, the invention can make the structure of the fingerprint image acquisition device be more compact.

Abstract: The disclosure relates to an LED lamp and an optical lens thereof. The optical lens includes a dome structure and a protrusion structure, the dome structure has an external surface, the protrusion structure is disposed on the external surface of the dome structure; the protrusion structure has a first optical surface and a first optical side connected with the first optical surface, the first optical surface and the external surface are connected to form a first boundary, the first optical side and the first boundary are inclined. The disclosure further provides an LED lamp. The LED lamp and the optical lens thereof above can improve optical efficiency.

Abstract: A LED lamp and an optical lens thereof are provided. The LED lamp includes a LED light source and an optical lens covering the LED light source. The optical lens includes a dome structure and a protrusion structure. The dome structure has an external surface. The protrusion structure is disposed protruding from the external surface and includes oppositely-disposed first and second side surfaces. The first side surface includes first and second optical surfaces. The second side surface includes a third optical surface. The second optical surface is connected immediately to the external surface and further connected between the external surface and the first optical surface. A boundary line of the second and the first optical surfaces is not disposed at the external surface. The third optical surface and the external surface are immediately connected. Accordingly, local uniformity of light distribution of the optical lens is improved.

Abstract: A fingerprint image acquisition device includes: a light source, a finger touching surface, a convex lens, an image sensor and a grating. The light source is a surface light source, and the grating is disposed on a light output surface of the light source. The light source is configured to emit a light beam, the grating is configured to change a propagation direction of the light beam to form a detection light beam, the finger touching surface is configured for a user to place a finger thereon to reflect the detection light beam and thereby obtain a reflected light beam, the convex lens is configured to focus the reflected light beam on the image sensor, and the image sensor is configured to generate a fingerprint image based on the focused reflected light beam. Accordingly, the invention can make the structure of the fingerprint image acquisition device be more compact.

Abstract: A direct-lit type backlight source includes a backplate and a point light source array disposed on the backplate. A light output shape of a first optical lens employed by each of point light sources of corner regions of the point light source array and that of a second optical lens employed by each of a plurality of point light sources of the non-corner region are different. For instance, the light output shape of the first optical lens is symmetrical in a first direction and asymmetrical in a vertical second direction. Moreover, a liquid crystal television adopting the direct-lit type backlight source is provided. The light-output shape of the optical lens adopted by each of the point light sources of the respective corners is designed to illuminate the corners uncovered by light source in the prior art, which can improve optical uniformity of the corners.

Abstract: The disclosure relates to an LED lamp and an optical lens thereof. The optical lens includes a dome structure and a protrusion structure, the dome structure has an external surface, the protrusion structure is disposed on the external surface of the dome structure; the protrusion structure has a first optical surface and a first optical side connected with the first optical surface, the first optical surface and the external surface are connected to form a first boundary, the first optical side and the first boundary are inclined. The disclosure further provides an LED lamp. The LED lamp and the optical lens thereof above can improve optical efficiency.

Abstract: A LED lamp and an optical lens thereof are provided. The LED lamp includes a LED light source and an optical lens covering the LED light source. The optical lens includes a dome structure and a protrusion structure. The dome structure has an external surface. The protrusion structure is disposed protruding from the external surface and includes oppositely-disposed first and second side surfaces. The first side surface includes first and second optical surfaces. The second side surface includes a third optical surface. The second optical surface is connected immediately to the external surface and further connected between the external surface and the first optical surface. A boundary line of the second and the first optical surfaces is not disposed at the external surface. The third optical surface and the external surface are immediately connected. Accordingly, local uniformity of light distribution of the optical lens is improved.

Abstract: A print controlling method is applied to a printer. The printer includes a plurality of nozzles, wherein each nozzle is respectively driven by one of a plurality of address lines. The print controlling method includes dividing the plurality of address lines into M groups, wherein M is a positive integer; and enabling the address lines belonging to one of the M groups to drive the corresponding nozzles during each slice period, wherein the address lines enabled at adjacent slice periods correspond to different groups.

Abstract: A method for printing data includes the following steps. First, an ink jet printer, having a print head with a black jet and a color jet, for printing a swath of data is provided. Then, the print head is driven to start to print the swath of data on one side of the ink jet printer. Next, the black jet and the color jet are alternately triggered to print corresponding pieces of black data and corresponding pieces of color data in the swath of data. Thereafter, the swath of data is completely printed when the print head is driven to the other side of ink jet printer.

Abstract: A printer performs one-way printing for outputting a test pattern as an actual pattern having printing deviation. An optical detector then scans the actual pattern in the same direction as the actual pattern is outputted and transforms the scanning result into a correlation diagram of a distance to the light reflection rate. A one-way deviation amount can be obtained and taken as a position adjustment value of the one-way printing by comparing the curve in the correlation diagram with a reference point. The forward printing deviation and the backward printing deviation of the printer can be corrected respectively when confronting inaccurate correction due to printhead jamming.

Abstract: A method for printing data includes the following steps. First, an ink jet printer, having a print head with a black jet and a color jet, for printing a swath of data is provided. Then, the print head is driven to start to print the swath of data on one side of the ink jet printer. Next, the black jet and the color jet are alternately triggered to print corresponding pieces of black data and corresponding pieces of color data in the swath of data. Thereafter, the swath of data is completely printed when the print head is driven to the other side of ink jet printer.

Abstract: A method for controlling printing quality in an inkjet printer having a printhead with a plurality of nozzles. The printhead is mounted in a carriage, and the carriage is moved to repeatedly pass the printhead across a print medium in individual swaths. The method includes firing individual nozzles repeatedly during each swath to apply an ink pattern to the print medium, measuring the temperature of the printhead prior to each swath, comparing the temperature of the printhead to at least one reference temperature, and if the temperature of the printhead is greater than the reference temperature, raising the velocity of the carriage during the upcoming swath for ensuring that a distance ink is ejected from the printhead to the print medium is kept substantially constant during each swath.

Abstract: A method for controlling printing quality in an inkjet printer having a printhead with a plurality of nozzles. The printhead is mounted in a carriage, and the carriage is moved to repeatedly pass the printhead across a print medium in individual swaths. The method includes firing individual nozzles repeatedly during each swath to apply an ink pattern to the print medium, measuring the temperature of the printhead prior to each swath, comparing the temperature of the printhead to at least one reference temperature, and if the temperature of the printhead is greater than the reference temperature, raising the velocity of the carriage during the upcoming swath for ensuring that a distance ink is ejected from the printhead to the print medium is kept substantially constant during each swath.

Abstract: An ink-jet printer includes a negative thermal coefficient thermistor for sensing temperature of the print head, and a monostable multivibrator, connected to the thermistor and a capacitor for realizing a pulse duration control circuit, such that the pulse duration control circuit generates a print enable signal with a duration corresponding to resistance of the thermistor. When the printer starts to jet ink, it supplies energy according to the duration of the print enable signal to heat ink, so that if temperature of the print head rises, the duration of the print enable signal decreases and energy supplied to heat ink will become less accordingly, thus degradation of printing due to heat accumulation is avoided.

Abstract: A printing apparatus includes a printhead and an ink volume detecting circuit. The printhead contains a plurality of first heating elements for heating ink supplied to the printhead to generate bubbles in the ink and eject the ink through corresponding nozzles. The printhead also contains a second heating element for heating the ink supplied to the printhead, a resistance value of the second heating element being less than the resistance value of each first heating element, and the low resistance value of the second heating element causing the second heating element to burn out and create an open circuit if the volume of the ink is less than a predetermined level. The ink volume detecting circuit is connected to the second heating element for determining if the volume of the ink supplied to the printhead is less than the predetermined level based on a condition of the second heating element.