Transformation based stress profile compression
A system and method for operating a display. In some embodiments, the method includes: transforming a stress profile for a slice of the display, with a first transformation, to form a transformed stress profile; compressing the transformed stress profile to form a compressed transformed stress profile; decompressing the compressed stress profile to form a decompressed transformed stress profile; and transforming the decompressed transformed stress profile, with a second transformation, to form a decompressed stress profile, the second transformation being an inverse of the first transformation.
1. A method for operating a display, the method comprising:
transforming a stress profile for a slice of the display, with a first transformation, to form a transformed stress profile;
compressing the transformed stress profile to form a compressed transformed stress profile;
decompressing the compressed transformed stress profile to form a decompressed transformed stress profile; and
transforming the decompressed transformed stress profile, with a second transformation, to form a decompressed stress profile, the second transformation being an inverse of the first transformation.
2. The method of claim 1 , wherein the transforming of the stress profile, with a first transformation, comprises multiplying the stress profile by a first transformation matrix.
3. The method of claim 2 , wherein the first transformation matrix is a discrete Fourier transform matrix.
4. The method of claim 2 , wherein the first transformation matrix is a Hadamard matrix.
5. The method of claim 2 , wherein the first transformation matrix is a unimodular matrix.
6. The method of claim 2 , further comprising generating a number, wherein the first transformation matrix is:
a first matrix, when the number equals a first value, and
a second matrix, different from the first matrix, when the number equals a second value.
7. The method of claim 6 , wherein the second matrix is an identity matrix.
8. The method of claim 6 , wherein the number is a pseudorandom number.
9. The method of claim 6 , further comprising:
storing the compressed transformed stress profile in a memory, and
storing the number in the memory.
10. A system for performing stress compensation in a display, the system comprising:
a memory; and
a processing circuit configured to:
transform a stress profile for a slice of the display, with a first transformation, to form a transformed stress profile;
compress the transformed stress profile to form a compressed transformed stress profile;
decompress the compressed transformed stress profile to form a decompressed transformed stress profile; and
transform the decompressed transformed stress profile, with a second transformation, to form a decompressed stress profile, the second transformation being an inverse of the first transformation.
11. The system of claim 10 , wherein the transforming of the stress profile, with a first transformation, comprises multiplying the stress profile by a first transformation matrix.
12. The system of claim 11 , wherein the first transformation matrix is a discrete Fourier transform matrix.
13. The system of claim 11 , wherein the first transformation matrix is a Hadamard matrix.
14. The system of claim 11 , wherein the first transformation matrix is a unimodular matrix.
15. The system of claim 11 , wherein:
the processing circuit is further configured to generate a number, and
the first transformation matrix is:
a first matrix, when the number equals a first value, and
a second matrix, different from the first matrix, when the number equals a second value.
16. The system of claim 15 , wherein the second matrix is an identity matrix.
17. The system of claim 15 , wherein the number is a pseudorandom number.
18. The system of claim 15 , wherein the processing circuit is further configured to:
store the compressed transformed stress profile in the memory, and
store the number in the memory.
19. A display, comprising:
a display panel;
a memory; and
a processing circuit configured to:
transform a stress profile for a slice of the display, with a first transformation, to form a transformed stress profile;
compress the transformed stress profile to form a compressed transformed stress profile;
decompress the compressed transformed stress profile to form a decompressed transformed stress profile; and
transform the decompressed transformed stress profile, with a second transformation, to form a decompressed stress profile, the second transformation being an inverse of the first transformation.
20. The display of claim 19 , wherein the first transformation is a discrete Fourier transform.