1. Method of operating an optical transmission system, wherein an optical signal (s, s1) is transmitted through at least one component (102) of said optical transmission system which exhibits spectral phase ripple, and wherein a phase of at least one frequency component of said optical signal (s, s1) is altered by phase influencing means (110) to at least partly compensate for said phase ripple of said at least one component, whereby a phase ripple compensated signal (s2) is obtained.
2. Method according to claim 1, wherein, alternatively to or in addition to said step of altering (210) a phase of at least one frequency component of said optical signal (s, s1), a transmission frequency of said optical signal (s, s1) is altered (400) by a predetermined amount.
3. Method according to claim 1, wherein said phase influencing means alter a respective phase of a plurality of frequency components of said optical signal (s, s1).
4. Method according to claim 1, wherein a reconfigurable optical add drop multiplexor, ROADM, comprising phase control capabilities is used for implementing said phase influencing means.
5. Method according to claim 1, wherein a liquid crystal on Silicon, LCOS, array andor a micro-electro-mechanical mirror array are used for altering (210) a phase of at least one frequency component of said optical signal (s, s1).
6. Method according to claim 1, wherein a phase ripple function is applied to the optical signal (s, s1) by said phase influencing means, and wherein a quality measure of said phase ripple compensated signal (s2), particularly a bit error rate, BER, is determined.
7. Method according to claim 5, wherein a relative phase of said phase ripple function is varied until said quality measure reaches a predetermined threshold value.
8. Method according to claim 2, wherein said step of altering said transmission frequency comprises detuning said transmission frequency by an amount of about 0.01 nanometers up to an amount of about 0.25 nanometers.
9. Method according to claim 2, wherein, at first, said transmission frequency of said optical signal (s, s1) is altered by a predetermined amount to minimize a bit error rate of said optical signal, and wherein, after minimizing the bit error rate, said phase of at least one frequency component of said optical signal (s, s1) is altered.
10. Method of operating an optical transmission system, wherein an optical signal (s, s1) is transmitted through at least one component of said optical transmission system which exhibits spectral phase ripple, and wherein a transmission frequency of said optical signal (s, s1) is altered to at least partly compensate for or reduce said phase ripple of said at least one component, whereby a phase ripple compensated signal (s2) is obtained.
11. Optical transmission system for transmitting an optical signal (s, s1), wherein said optical transmission system comprises phase influencing means that are configured to influence a phase of at least one frequency component of said optical signal (s, s1) to at least partly compensate a phase ripple of at least one component of said optical transmission system.
12. Optical transmission system according to claim 11, wherein said phase influencing means are configured to alter a respective phase of a plurality of frequency components of said optical signal (s, s1).
13. Optical transmissions system according to claim 11, wherein a reconfigurable optical add drop multiplexor, ROADM, comprising phase control capabilities is provided to implement said phase influencing means.
14. Optical transmission system, wherein said phase influencing means comprise at least one liquid crystal on silicon, LCOS, array andor a micro-electro-mechanical mirror array for altering a phase of at least one frequency component of said optical signal (s, s1).
15. Optical transmission system according to claim 11, wherein said optical transmission system is configured to apply a phase ripple function to the optical signal (s, s1) by said phase influencing means, and wherein said optical transmission system is configured to determine a quality measure of said phase ripple compensated signal (s2) obtained by said phase influencing means.
16. Optical transmission system according to claim 15, wherein said optical transmission system is configured to vary a phase of said phase ripple function until said quality measure reaches a predetermined threshold value.
17. Optical transmission system for transmitting an optical signal (s), comprising transceiver means for generating said optical signal (s), wherein said transceiver means are configured to alter a transmission frequency of said optical signal (s) by a predetermined amount.
18. Optical transmission system according to claim 17, wherein said transceiver means are configured to detune said transmission frequency by an amount of about 0.01 nm up to an amount of about 0.25 nm.
19. Optical transmission system according to claim 17, wherein said optical transmission system is configured to alter a transmission frequency of said optical signal by a predetermined amount to minimize a bit error rate of said optical signal (s, s1), and, after that, to alter the phase of at least one frequency component of said optical signal (s, s1).
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 driving a display apparatus, comprising:
receiving an image signal in response to a synchronizing signal having a first frequency;
discriminating whether the image signal is a signal corresponding to a film image or a signal corresponding to a video image;
converting the synchronizing signal into a driving signal having a second frequency higher than the first frequency;
extracting, when the image signal is discriminated to correspond to the film image, successive first, second, and third original image signals based on the film image signal;
generating a first compensation image signal based on the first original image signal and the second original image signal and generating a second compensation image signal based on the second original image signal and the third original image signal; and
sequentially outputting the first original image signal, the first compensation image signal, the second original image signal, and the second compensation image signal in response to the driving signal,
wherein the first original image signal, the first compensation image signal, the second original image signal, and the second compensation image signal are output i times, k times, j times, and k times, respectively.
2. The method of claim 1, wherein the first frequency is 60 Hz and the second frequency is 72 Hz.
3. The method of claim 1, wherein the first compensation image signal comprises at least one sub compensation image signal to display an intermediated image between the first original image signal and the second original image signal,
the second compensation image signal comprises at least one sub compensation image signal to display an intermediated image between the second original image signal and the third original image signal.
4. The method of claim 2, wherein i is 1, j is 1, and k is 2.
5. The method of claim 1, wherein the first frequency is 60 Hz, and the second frequency is 96 Hz.
6. The method of claim 5, wherein i is 1, j is 1, and k is 2.
7. The method of claim 1, wherein the first frequency is 60 Hz, and the second frequency is 120 Hz.
8. The method of claim 7, wherein the i is 3, the j is 3, and the k is 2.
9. The method of claim 7, wherein the i is 5, the j is 3, and the k is 1.
10. The method of claim 1, wherein the first compensation image signal is generated using a first motion vector generated based on the first original image signal and the second original image signal and wherein the first motion vector serves as a signal that displays intermediate images existing between a first original image corresponding to the first original image signal and a second original image corresponding to the second original image signal, and the second compensation image signal is generated using a second motion vector generated based on the second original image signal and the third original image signal and wherein the second motion vector serves as a signal that displays intermediate images existing between the second original image corresponding to the second original image signal and a third original image corresponding to the third original image signal
11. The method of claim 1, wherein the discriminating of the image signal comprises:
receiving the image signal as an n-th image signal, a previously-stored (n\u22121)-th image signal, and a previously-stored (n\u22122)-th image signal and calculating first, second, and third brightness values corresponding to the n-th image signal, the (n\u22121)-th image signal, and the (n\u22122)-th image signal, respectively;
calculating a first difference value corresponding to a difference between the first and second brightness values and a second difference value corresponding to a difference between the second and third brightness values; and
comparing the first and second difference values with a predetermined reference value to discriminate whether the image signal is the signal corresponding to the film image or the signal corresponding to the video image.
12. The method of claim 11, wherein the comparing of the first and second difference values comprises:
comparing the second difference value with the reference value if the first difference value is smaller than the reference value and discriminating that the n-th image signal is the signal corresponding to the video image if the first difference value is greater than the reference value;
calculating a third difference value corresponding to a difference between the third brightness value and a fourth brightness value corresponding to an (n+1)-th image signal and calculating a fourth difference value corresponding to a difference between the fourth brightness value and a fifth brightness value corresponding to an (n+2)-th image signal; and
comparing the third difference value with the reference value if the second difference value is smaller than the reference value and comparing the fourth difference value with the reference value if the second difference value is greater than the reference value to discriminate whether the n-th image signal is a signal corresponding to a still image or the signal corresponding to the film image.
13. The method of claim 12, wherein the comparing of the third and fourth difference values with the reference value comprises:
discriminating that the n-th image signal is the signal corresponding to the still image if the third difference value is smaller than the reference value and comparing the fourth difference value with the reference value if the third difference value is greater than the reference value; and
discriminating that the n-th image signal is the signal corresponding to the film image if the fourth difference value is smaller than the reference value and that the n-th image signal is the signal corresponding to the video image if the fourth difference value is greater than the reference value.
14. A method of driving a display apparatus, comprising:
receiving an image signal in response to a synchronizing signal having a first frequency;
discriminating whether the received image signal is a signal corresponding to a film image or a signal corresponding to a video image;
converting the synchronizing signal into a driving signal having a second frequency higher than the first frequency;
extracting, if the image signal is discriminated to be a film image signal corresponding to the film image, successive first and second original image signals based on the film image signal; and
sequentially outputting the first and second original image signals i times in response to the driving signal.
15. The method of claim 14, wherein the discriminating of the received image signal comprises:
receiving the image signal as an n-th image signal, a previously-stored (n\u22121)-th image signal and a previously-stored (n\u22122)-th image signal and calculating first, second, and third brightness values corresponding to the n-i image signal, the (n\u22121)-th image signal, and the (n\u22122)-th image signal, respectively;
calculating a first difference value corresponding to a difference between the first and second brightness values and a second difference value corresponding to a difference between the second and third brightness values; and
comparing the first and second difference values with a predetermined reference value to discriminate whether the image signal is the signal corresponding to the film image or the signal corresponding to the video image.
16. The method of claim 15, wherein the comparing of the first and second difference values with the reference value comprises:
comparing the second difference value with the reference value if the first difference value is smaller than the reference value and discriminating that the n-th image signal is the signal corresponding to the video image if the first difference value is greater than the reference value;
calculating a third difference value corresponding to a difference between the third brightness value and a fourth brightness value corresponding to an (n+1)-th image signal and calculating a fourth difference value corresponding to a difference between the fourth brightness value and a fifth brightness value corresponding to an (n+2)-th image signal; and
comparing the third difference value with the reference value if the second difference value is smaller than the reference value and comparing the fourth difference value with the reference value if the second difference value is greater than the reference value to discriminate whether the n-th image signal is the signal corresponding to a still image or the signal corresponding to the film image.
17. The method of claim 16, wherein the comparing of the third and fourth difference value with the reference value comprises:
discriminating that the n-th image signal is the signal corresponding to the still image if the third difference value is smaller than the reference value and comparing the fourth difference value with the reference value if the third difference value is greater than the reference value; and
discriminating that the n-th image signal is the signal corresponding to the film image if the fourth difference value is smaller than the reference value and that the n-th image signal is the signal corresponding to the video image if the fourth difference value is greater than the reference value.
18. A driving circuit for a display apparatus that receives an image signal based on a synchronizing signal having a first frequency, the driving circuit comprising:
an image signal discriminator that discriminates whether the image signal is a signal corresponding to a film image or a signal corresponding to a video image;
an original image signal extractor that extracts first, second, and third original image signals, which are successive, based on a film image signal if the image signal is the signal corresponding to the film image;
an image signal converter that generates first and second compensation image signals based on the first, second, and third original image signals;
a frequency modulator that converts the synchronizing signal into a driving signal having a second frequency higher than the first frequency; and
a data outputter that outputs the first original image signal i times, the second original image signal j times, the first compensation image signal k times, and the second compensation image signal k times, wherein, j, and k are integers.
19. The driving circuit of claim 18, wherein the image signal converter generates the first compensation image signal using a first motion vector generated based on the first original image signal and the second original image signal and wherein the first motion vector serves as a signal that displays intermediate images existing between a first original image corresponding to the first original image signal and a second original image corresponding to the second original image signal, and the image signal converter generates the second compensation image signal using a second motion vector generated based on the second original image signal and the third original image signal and wherein the first motion vector serves as a signal that displays intermediate images existing between the second original image corresponding to the second original image signal and a third original image corresponding to the third original image signal.
20. The driving circuit of claim 18, wherein the image signal discriminator comprises:
a brightness value calculator that receives the image signal as an n-th image signal, a previously-stored (n\u22121)-th image signal, and a previously-stored (n\u22122)-th image signal and calculates first, second, and third brightness values corresponding to the n-th image signal, the (n\u22121)-th image signal, and the (n\u22122)-th image signal, respectively;
a difference calculator that calculates a first difference value corresponding to a difference between the first and second brightness values and a second difference value corresponding to a difference between the second and third brightness values; and
a comparator that compares the first and second difference values with a predetermined reference value to discriminate whether the image signal is the signal corresponding to the film image or the signal corresponding to the video image.
21. The driving circuit of claim 20, wherein the comparator compares the second difference value with the reference value if the first difference value is smaller than the reference value and discriminates that the n-th image signal is the signal corresponding to the video image if the first difference value is greater than the reference value.
22. The driving circuit of claim 21, wherein the brightness value calculator further calculates a fourth brightness value corresponding to an (n+1)-th image signal and a fifth brightness value corresponding to an (n+2)-th image signal, and the difference value calculator further calculates a third difference value corresponding to a difference between the third brightness value and calculates the fourth brightness value and a fourth difference value corresponding to a difference between the fourth brightness value and the fifth brightness value.
23. The driving circuit of claim 22, wherein the comparator compares the third difference value with the reference value if the second difference value is smaller than the reference value and compares the fourth difference value with the reference value if the second difference value is greater than the reference value to discriminate whether the n-th image signal is a signal corresponding to a still image or the signal corresponding to the film image.
24. The driving circuit of claim 23, wherein the comparator discriminates that the n-th image signal is the signal corresponding to the still image if the third difference value is smaller than the reference value, compares the fourth difference value with the reference value if the third difference value is greater than the reference value, discriminates that the n-th image signal is the signal corresponding to the film image if the fourth difference value is smaller than the reference value, and discriminates that the n-th image signal is the signal corresponding to the video image if the fourth difference value is greater than the reference value.