1. An apparatus for controlling an orientation of image data, the apparatus comprising:
a display panel being rotatable about at least one axis, the rotation of said display panel setting an orientation of the display panel, the display panel orientation being selectable according to each of a plurality of rotational angles, each rotational angle corresponding to an orientation mode for determining a display angle of original image data; and
an orientation mode detector, installed in said display panel, configured to detect the set orientation of the display panel and to determine the orientation mode based on the detected orientation.
2. The apparatus of claim 1, further comprising:
a first sensor, installed in said display panel, configured to detect a first rotational angle of said display panel about a first axis perpendicular to said display panel; and
a second sensor, installed in said display panel, configured to detect a second rotational angle of said display panel about a second axis perpendicular to the first axis.
3. The apparatus of claim 2, wherein said first and second sensors each comprise:
a conductive ball, captured within a space of said display panel, for moving freely in correspondence to a gravitational force applied to said display panel; and
a plurality of contact points arranged adjacent to each other within the captured space of said display panel so that said conductive ball remains in electrical contact with at least one contact point, wherein the selected orientation mode is determined when said conductive ball is in electrical contact with exactly two of said plurality of contact points.
4. The apparatus of claim 3, wherein the number of contact points corresponds to the number of orientation modes.
5. The apparatus of claim 1, further comprising:
a system memory configured to store orientation parameters corresponding to a plurality of image orientation modes;
a system controller configured to acquire information indicating the determined orientation mode from said orientation mode detector and to extract orientation parameters corresponding to the acquired information; and
a driver configured to change an orientation of the original image data according to the extracted orientation parameters, wherein the orientation-changed image data is stored in said system memory and is displayed on a display screen.
6. The apparatus of claim 5, wherein said orientation mode detector comprises:
a display memory, configured to store information indicating the determined orientation mode; and
a display controller for sending an acknowledgement to said system controller when a request for access to said display memory is received.
7. An apparatus for controlling an orientation of image data, the apparatus comprising:
a display panel being rotatable about two axes, the rotation of said display panel setting a disposition of the display panel, the display panel disposition being selectable according to each of a plurality of discrete rotational angles, each rotational angle corresponding to an orientation mode for determining a display angle of original image data;
a first sensor, installed in said display panel, configured to detect a first rotational angle of said display panel about a first axis perpendicular to the display panel, said first sensor responsive to a controlled movement of said display panel on a ball hinge centrally disposed on a rear surface of said display panel; and
a second sensor, installed in said display panel, configured to detect a second rotational angle of said display panel about a second axis perpendicular to the first axis, said second sensor responsive to a controlled movement of said display panel on a pivoting hinge coupled to the ball hinge.
8. The apparatus of claim 7, wherein the ball hinge enables 360 degrees of movement by said display panel on the first axis.
9. The apparatus of claim 8, wherein the 360 degrees of movement by said display panel includes a display panel disposition corresponding to each of a 0 degrees orientation mode, a 90 degrees orientation mode, a 180 degrees orientation mode, and a 270 degrees orientation mode.
10. The apparatus of claim 7, wherein the pivoting hinge enables 180 degrees of movement by said display panel on the second axis.
11. The apparatus of claim 10, wherein the 180 degrees of movement by said display panel includes a display panel disposition corresponding to each of a 0 degrees orientation mode and a 180 degrees orientation mode.
12. A computer-readable medium storing program code for determining an orientation mode for original image data in a display system, which includes at least a display panel, a processor, memory, and a controller of image orientation and which, in response to a manual rotation of the display panel about at least one of at least two axes, causes the processor to execute the program code to perform:
(a) determining whether the display panel is rotated about a first axis of the at least two axes;
(b) when the determination in step (a) is true, determining whether a first rotational angle of the display panel about the first axis is 90 degrees;
(c) when the determination in step (b) is true, determining whether the display panel is rotated about a second axis of the at least two axes;
(d) when the determination in step (c) is true, determining whether a second rotational angle of the display panel about the second axis is 180 degrees;
(e) when the determination in step (d) is true, storing an orientation mode of 270 degrees in a memory;
(f) determining whether a request for access to the memory has been received from an image orientation controller; and
(g) when the request is made, transmitting an acknowledgement to the image orientation controller for authorizing access to the memory.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of dynamic reference plane compensation, comprising:
impinging radiation from a first radiation source onto a surface of an object;
generating an uncompensated measurement signal from radiation reflected from a first location on the surface and a second location;
generating a compensation signal from radiation reflected from a third location and a fourth location on the surface; and
generating a compensated measurement signal using the uncompensated measurement signal and the compensation signal.
2. The method of claim 1, further comprising impinging radiation from a second radiation source onto the first surface of an object.
3. The method of claim 1, wherein generating an uncompensated measurement signal from radiation reflected from a first location on the surface and a second location comprises determining a phase difference between radiation reflected from the first location and the second location.
4. The method of claim 1, wherein generating a compensation signal from radiation reflected from a third location on the surface and a fourth location on the surface comprises determining a phase difference between radiation reflected from the third location and the fourth location.
5. The method of claim 1, wherein generating a compensated measurement signal from the first measurement signal and the compensation signal comprises determining a difference between the first measurement signal and the compensation signal.
6. A system for dynamic reference plane compensation, comprising:
a radiation directing assembly to impinge radiation from a first radiation source onto a first surface of an object;
a measurement signal generating assembly to generate an uncompensated measurement signal from radiation reflected from a first location on the surface and a second location;
a compensation signal generating assembly to generate a compensation signal from radiation reflected from a third location and a fourth location on the surface; and
a compensated measurement signal generating assembly to generate a compensated measurement signal from the uncompensated measurement signal and the compensation signal.
7. The system of claim 6, wherein the radiation directing assembly comprises:
a first laser diode to generate a first laser beam for the measurement signal;
a second laser diode to generate a second laser beam for the compensation signal.
8. The system of claim 7, wherein the radiation directing assembly comprises:
a single optical assembly to direct a portion of the first laser beam and a portion of the second laser beam onto the surface.
9. The system of claim 7, wherein the measurement beams are directed onto the surface substantially parallel to a radial line extending from the center of the rotating disk.
10. The system of claim 6, wherein the measurement signal generating assembly and the compensation signal generating assembly comprise:
a diffraction grating;
a phase shifting assembly; and
a signal generating assembly to generate a measurement signal based on a phase difference between radiation reflected from the first location and the second location.
11. The system of claim 6, wherein the compensated measurement signal generating assembly comprises:
means for calculating a phase difference from the measurement signal;
means for calculating a phase difference for the compensation signal;
means for generating a compensated measurement signal from the first measurement signal and the compensation signal.
12. A method of measuring a distance between a surface of an object and a test block, comprising:
rotating the object about a central axis;
directing radiation from a first radiation source onto a first location on a first surface of the object and onto the test block at a second location adjacent the first location;
directing radiation from a second radiation source onto a third location and a fourth location on the first surface of the object;
generating an uncompensated measurement signal from radiation reflected from a first location on the surface and the test block;
generating a compensation signal from radiation reflected from a third location and a fourth location on the surface of the object;
generating a compensated measurement signal from the uncompensated measurement signal and the compensation signal; and
determining the distance between the first surface of the disk and the readwrite head from the compensated measurement signal.
13. The method of claim 12, wherein directing radiation from a first radiation source onto a first location on a first surface of the disk and onto the readwrite head at a second location adjacent the first location comprises transmitting a laser beam through an optical assembly that splits the laser beam into a first beam and a second beam.
14. The method of claim 12, wherein directing radiation from a second radiation source onto a third location and a fourth location on the first surface of the disk comprises transmitting a laser beam through an optical assembly that splits the laser beam into a third beam and a fourth beam.
15. The method of claim 12, wherein the radiation from the first radiation source and the radiation from the second radiation source are transmitted through a common optical assembly.
16. The method of claim 12, wherein generating a first measurement signal from radiation reflected from a first location on the surface and the readwrite head comprises determining a phase difference between radiation reflected from the first location and the test block.
17. The method of claim 12, wherein generating a compensation signal from radiation reflected from a third location and a fourth location on the surface comprises determining a phase difference between radiation reflected from the third location and the fourth location.
18. The method of claim 12, wherein generating a compensated measurement signal from the first measurement signal and the compensation signal comprises determining a difference between the first measurement signal and the compensation signal.