Method for linearizing microactuator hysteresis for a disc drive
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G11B-005/596
G11B-021/02
출원번호
US-0895666
(2001-06-28)
발명자
/ 주소
Bi, Qiang
Pang, Jimmy TzeMing
Gomez, Kevin Arthur
출원인 / 주소
Seagate Technology LLC
대리인 / 주소
Fellers, Snider, et al.
인용정보
피인용 횟수 :
8인용 특허 :
10
초록▼
Linearizing hysteresis of a microactuator for a disc drive by modeling the microactuator with a first polynomial equation to provide a linear displacement response of the microactuator responding to an applied voltage, deriving a set of constants from a plurality of burst patterns for use with the f
Linearizing hysteresis of a microactuator for a disc drive by modeling the microactuator with a first polynomial equation to provide a linear displacement response of the microactuator responding to an applied voltage, deriving a set of constants from a plurality of burst patterns for use with the first polynomial equation to provide a set of variables for use in resolving the second polynomial equation to provide a set of equations from which a set of constants can be derived for use by the second polynomial equation to provide a voltage to the microactuator to displace the microactuator by a predetermined incremental distance.
대표청구항▼
Linearizing hysteresis of a microactuator for a disc drive by modeling the microactuator with a first polynomial equation to provide a linear displacement response of the microactuator responding to an applied voltage, deriving a set of constants from a plurality of burst patterns for use with the f
Linearizing hysteresis of a microactuator for a disc drive by modeling the microactuator with a first polynomial equation to provide a linear displacement response of the microactuator responding to an applied voltage, deriving a set of constants from a plurality of burst patterns for use with the first polynomial equation to provide a set of variables for use in resolving the second polynomial equation to provide a set of equations from which a set of constants can be derived for use by the second polynomial equation to provide a voltage to the microactuator to displace the microactuator by a predetermined incremental distance. econd means. 10. An active matrix type liquid crystal display device according to claim 9, wherein the color filters are elongated in a stripe shape and cross over the first means. 11. An active matrix type liquid crystal display device comprising: a first and a second substrate with a liquid crystal layer therebetween; a plurality of drain lines and gate lines formed on the first substrate and crossing each other in a matrix form; a plurality of pixels formed by adjoining said drain lines and said gate lines; at least a counter electrode and at least a pixel electrode formed on the first substrate in each pixel; a gate terminal connected to the gate line formed on the first substrate; and means for light blocking when no voltage is applied between the counter electrode and the pixel electrode, the light blocking means being provided in a layer which is the same as a layer of the gate terminal. 12. An active matrix type liquid crystal display device according to claim 11, further comprising a drain terminal connected to the drain line formed on the first substrate, wherein the light blocking means are provided in the layer which is the same as a layer of the drain terminal. 13. An active matrix type liquid crystal display device according to claim 12, further comprising a storage line in each pixel and a storage line terminal connected to the storage line formed on the first substrate, wherein the light blocking means are provided in the layer which is the same as a layer of the storage line terminal. 14. An active matrix type liquid crystal display device according to claim 11, wherein the light blocking means are arranged over the drain line. 15. An active matrix type liquid crystal display device according to claim 14, further comprising a light blocking film arranged over the gate line, wherein the light blocking means and the light blocking film have an overlapping region. 16. An active matrix type liquid crystal display device according to claim 11, further comprising a plurality of color filters with an edge thereof being arranged at an overlapping region with the light blocking means in plan view. 17. An active matrix type liquid crystal display device according to claim 16, wherein the color filters are in a stripe shape and extend across the gate lines in plan view. 18. An active matrix type liquid crystal display device according to claim 11, wherein the liquid crystal display device has a normally black mode. 19. An active matrix type liquid crystal display device according to claim 18, wherein the light blocking means includes a transparent conductor formed on the drain line. 20. An active matrix type liquid crystal display device according to claim 11, wherein the light blocking means includes a transparent conductor formed on the drain line. 21. An active matrix liquid crystal display device according to claim 11, wherein the means for light blocking is arranged in a stripe shape in a horizontal direction, and further comprising other means for light blocking continuously arranged in a stripe shape in a vertical direction. 22. An active matrix liquid crystal display device according to claim 21, wherein the means for light blocking is arranged over the drain line, and the other means for light blocking is arranged over the gate line. 23. An active matrix liquid crystal display device according to claim 22, wherein the means for light blocking and the other means for light blocking have an overlapping region. 24. An active matrix liquid crystal display device according to claim 23, further comprising a plurality of color filters with an edge arranged over the means for light blocking. 25. An active matrix liquid crystal display device according to claim 24, wherein the color filters are elongated in a stripe shape and cross over the other means for light blocking. 26. An active matrix liquid crystal display device according to claim 11, wherein the means for light blocking include a counter electrode ha ving an overlapping relation with the drain line and made of transparent conductor, and the liquid crystal display device has a normally black mode. 27. An active matrix liquid crystal display device according to claim 26, further comprising at least one light blocking film arranged parallel to the gate line, and each light blocking film being spaced from the drain line. 28. An active matrix liquid crystal display device according to claim 27, wherein the counter electrode is extended in a region of the light blocking film. 29. An active matrix liquid crystal display device according to claim 27, wherein the light blocking film is arranged on the second substrate. 30. An active matrix liquid crystal display device according to claim 29, wherein the color filters are elongated in a stripe shape and extend across adjacent gate lines. 31. An active matrix liquid crystal display device according to claim 27, further comprising a plurality of color filters on one of the first and second substrates, wherein an edge of the color filters are arranged in overlapping relation with the counter electrode which is formed above the drain line. , each of said fine grooves having an optical path changing slope, and a steep slope facing said optical path changing slope, said optical path changing slopes being provided so that light incident on said side surface from said light source is reflected toward said back-side cell substrate side, each of said optical path changing slopes being inclined at an inclination angle in a range of from 35 to 48 degrees to a reference plane of said liquid-crystal display panel, each of said steep slopes being inclined at an inclination angle of not lower than 60 degrees to said reference plane; a transparent adhesive layer; and a transparent touch panel provided with a mechanism for detecting an input position and bonded to an outer side of said optical path control layer through said transparent adhesive layer. 2. A reflective liquid-crystal display device according to claim 1, wherein said visual-side cell substrate further contains a transparent layer lower in refractive index than that of said transparent substrate and disposed between said transparent substrate and said transparent electrode. 3. A reflective liquid-crystal display device according to claim 1, wherein each of said visual-side cell substrate and said back-side cell substrate is made of an optically isotropic material. 4. A reflective liquid-crystal display device according to claim 1, wherein an area occupied by said light output means is not larger than 1/8 as large as an area of one surface of said optical path control layer. 5. A reflective liquid-crystal display device according to claim 1, wherein each of said optical path changing slopes in said optical path control layer is inclined at an inclination angle in a range of from 38 to 45 degrees to said reference plane of said liquid-crystal display panel. 6. A reflective liquid-crystal display device according to claim 1, wherein said fine grooves constituting said light output means are arranged to be distributed at random in one surface of said optical path control layer. 7. A reflective liquid-crystal display device according to claim 1, wherein said fine grooves constituting said light output means in said optical path control layer are arranged more densely as they are farther from said light source. 8. A reflective liquid-crystal display device according to claim 1, wherein said fine grooves constituting said light output means in said optical path control layer are arranged more densely as they are nearer to each of side end surfaces based on said side surface on which said light source is disposed. 9. A reflective liquid-crystal display device according to claim 1, wherein said optical path control layer is made of a transparent film coated with a layer for forming said light output means. 10. A reflective liquid-crystal display device according to claim 1, wherein said optical path control layer is made of an optically isotropic material. 11. A reflective liquid-crystal display device according to claim 1, wherein: said light source disposed on said side surface of said liquid-crystal display panel is made of a linear light source; and said fine grooves constituting said light output means are arranged in parallel to one another in terms of said optical path changing slopes. 12. A reflective liquid-crystal display device according to claim 1, wherein: said light source disposed on said side surface of said liquid-crystal display panel is made of a point light source; and said fine grooves constituting said light output means are arranged concentrically with said point light source as a virtual center. 13. A reflective liquid-crystal display device according to claim 1, wherein said reflective liquid-crystal display panel further includes at least one polarizer disposed on at least one surface of said liquid-crystal cell. 14. A reflective liquid-crystal display device according to claim 13, wherein said reflective liquid-crystal display panel further includes a phase retarder between said liquid-crys tal cell and said polarizer. 15. A reflective liquid-crystal display device according to claim 1, wherein said touch panel includes an input side transparent base material containing a transparent electrode, and a pressure-receiving side transparent base material containing a transparent electrode and disposed opposite to said input side transparent base material so that the respective transparent electrodes of the two base materials face each other through a gap. 16. A reflective liquid-crystal display device according to claim 15, wherein said input side base material as one of constituent members of said touch panel is constituted by a transparent film containing a transparent electrode. 17. A reflective liquid-crystal display device according to claim 15, wherein said pressure-receiving side base material as one of constituent members of said touch panel is constituted by a support base material having an in-plane retardation of not larger than 20 nm and containing a transparent electrode. 18. A reflective liquid-crystal display device according to claim 15, wherein said pressure-receiving side base material as one of constituent members of said touch panel is constituted by a support base material having a thicknesswise retardation of not larger than 50 nm and containing a transparent electrode. 19. A reflective liquid-crystal display device according to claim 1, wherein said touch panel further includes an anti-reflection layer in its outermost surface. 20. A reflective liquid-crystal display device according to claim 1, wherein said adhesive layer for bonding said optical path control layer and said touch panel to each other is a tacky layer. 21. A reflective liquid-crystal display device according to claim 1, wherein said adhesive layer for bonding said optical path control layer and said touch panel to each other is formed so that said fine grooves constituting said light output means in said optical path control layer are not filled with said adhesive layer. 22. A reflective liquid-crystal display device according to claim 1, wherein said adhesive layer for bonding said optical path control layer and said touch panel to each other has a refractive index lower than that of said optical path control layer so that a refractive index difference between said adhesive layer and said optical path control layer is not lower than 0.02. 23. A reflective liquid-crystal display device according to claim 1, wherein said adhesive layer for bonding said optical path control layer and said touch panel to each other exhibits a storage elastic modulus of not smaller than 5×104N/m2at 20° C. maximum of the line intercept, shifted line intercept and vertex coordinate values; and using the minimum and maximum values to determine to bins associated with zones to be processed. 3. The method of claim 2, wherein shifting the line intercept values to expand the intercept values further comprises: shifting the intercept values by a predefined amount. 4. The method of claim 2, wherein selecting zones for processing the at least one graphics polygon based upon the minimum and maximum of line intercept and vertex coordinate values further comprises: expanding the bounding box column on both edges; determining line intercept values at expanded edges; shifting the line intercept values to expand the line intercept values at expanded edges; determining the minimum and maximum of the line intercept, shifted line intercept and vertex coordinate values; and using the minimum and maximum values to determine to bins associated with zones to be processed. 5. The method of claim 4, wherein determining characteristics of the polygon including vertex coordinate values further comprises: determining the line width and line cap of the line. 6. The method of claim 4, wherein the line width and line cap are programmable constants. 7. The method of claim 4, wherein edges parallel to the line are located at a distance line width divided by two from the line and line cap edges are perpendicular to the line. 8. The method of claim 7, wherein expanding the bounding box column on both edges further comprises: calculating the expanded value in accordance with E=ceiling(line width/2+lc). 9. The method of claim 1, wherein the polygon comprises a line. 10. The method of claim 9, wherein determining the minimum and maximum of the line intercept, shifted line intercept and vertex coordinate values further comprises: determining the minimum and maximum among potentially six line intercept, shifted line intercept and vertex coordinate values. 11. A machine readable medium having stored therein a plurality of machine readable instructions executable by a processor to render a view including at least one geometric polygon within a zone renderer including a plurality of zones, the machine readable instructions comprising: instructions to determine a bounding box for at least one graphics polygon in said view, each bounding box defining an area that encloses said geometric polygon; instructions to determine characteristics of the polygon including vertex coordinate values; instructions to select zones to process the at least one graphics polygon based upon the minimum and maximum of line intercept and vertex coordinate values; and instructions to process bins associated with each selected zone such that those pixels covered by the at least one geometric polygon and contained in the selected zone are processed. 12. The machine readable medium of claim 11, wherein instructions to select zones to process the at least one graphics polygon based upon the minimum and maximum of line intercept and vertex coordinate values, further comprises: instructions to traverse the bounding box column-by-column and determining line intercept values for each edge of the column; instructions to determine line intercept values; instructions to shift the line intercept values to expand the intercept values; instructions to determine the minimum and maximum of the line intercept, shifted line intercept and vertex coordinate values; and instructions to use the minimum and maximum values to determine to bins associated with zones to be processed. 13. The machine readable medium of claim 12, wherein instructions to shift the line intercept values to expand the intercept values further comprises: instructions to shift the intercept values by a predefined amount. 14. The machine readable medium of claim 12, wherein instructions to select zones for processing the at least one graphics polygon based upon the minimum and maximum of line
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이 특허에 인용된 특허 (10)
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Morris John C., Method of implementing a linear discrete-time state-space servo control system on a fixed-point digital signal processor in a disc drive.
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