Foldable display and image processing method thereof

1. A foldable display, comprising:

a display module;

a memory;

a sensor module detecting a bending state of the display module; and

a processing unit generating a plurality of adjusted images according to an image signal and respectively storing those adjusted images to a plurality of memory addresses of the memory, wherein the processing unit selects a reading address from those memory addresses according to the bending state, and selects one of the adjusted images from the memory according to the reading address and outputs the selected adjusted image to the display module.

2. The foldable display according to claim 1 , wherein the processing unit comprises:

an image processing core generating those adjusted images according to the image signal, and respectively storing those adjusted images to those memory addresses; and

a central processor controlling the image processing core to read the corresponding adjusted image according to the bending state and output the corresponding adjusted image to the display module.

3. The foldable display according to claim 2 , wherein the image processing core further generates a user interface stored to the memory, and when the display module is not folded, the display module displays the user interface and the corresponding adjusted image.

4. The foldable display according to claim 1 , wherein the sensor module comprises a first sensor and a second sensor, those adjusted images comprise a first adjusted image, a second adjusted image and a third adjusted image, the first adjusted image is larger than the second adjusted image, and the second adjusted image is larger than the third adjusted image, and when a curvature of the first sensor and a curvature of the second sensor are not larger than a threshold, the processing unit selects the first adjusted image and outputs the first adjusted image to the display module.

5. The foldable display according to claim 4 , wherein when the curvature of the first sensor is larger than the threshold and the second sensor is not larger than the threshold, the processing unit selects the second adjusted image and outputs the second adjusted image to the display module.

6. The foldable display according to claim 4 , wherein when both curvatures of the first sensor and the second sensor are larger than the threshold, the processing unit selects the third adjusted image and outputs the third adjusted image to the display module.

7. The foldable display according to claim 4 , wherein the processing unit generates a difference map between a plurality of original images at an interval of the original images.

8. The foldable display according to claim 4 , wherein each of the first sensor and the second sensor of the sensor module is a bending sensor, a pressure sensor, a light sensor, touch sensor, a mechanical sensor, a magnetic sensor, an acceleration sensor or a gyroscope.

9. The foldable display according to claim 1 , wherein those adjusted images respectively correspond to a plurality of folding modes of the display module.

10. The foldable display according to claim 1 , wherein the display module is formed by one single substrate.

11. The foldable display according to claim 1 , wherein the display module is formed by multi-substrates connected together.

12. An image processing method of a foldable display comprising a sensor module, a display module and a memory, wherein the image processing method comprises:

generating a plurality of adjusted images according to an image signal;

respectively storing those adjusted images to a plurality of memory addresses of the memory;

detecting a bending state of the display module by the sensor module; and

selecting a reading address from those memory addresses according to the bending state, and selecting one of the adjusted images from the memory according to the reading address and outputting the selected adjusted image to the display module.

13. The image processing method according to claim 12 , further comprising:

generating a user interface stored to the memory;

wherein, when the display module is not folded, the display module displays the user interface and the corresponding adjusted image.

14. The image processing method according to claim 12 , wherein the sensor module comprises a first sensor and a second sensor, those adjusted images comprise a first adjusted image, a second adjusted image and a third adjusted image, the first adjusted image is larger than the second adjusted image, and the second adjusted image is larger than the third adjusted image, and the selection step comprises:

determining whether at least one of a curvature of the first sensor and a curvature of the second sensor is larger than a threshold; and

selecting the first adjusted image and outputting the first adjusted image to the display module when both of the curvatures of the first sensor and the second sensor are not larger than the threshold.

15. The image processing method according to claim 14 , wherein the selection step further comprises:

determining whether both of the curvatures of the first sensor and the second sensor are larger than the threshold when at least one of the curvatures of the first sensor and the second sensor is larger than the threshold; and

selecting the second adjusted image and outputting the second adjusted image to the display module when either one but not both of the curvatures of the first sensor and the second sensor are larger than the threshold.

16. The image processing method according to claim 14 , wherein the selection step further comprises:

selecting the third adjusted image and outputting the third adjusted image to the display module when both of the curvatures of the first sensor and the second sensor are larger than the threshold.

17. The image processing method according to claim 12 , wherein in the generation step, a difference map between a plurality of original images is generated at an interval of the original images.

18. The image processing method according to claim 12 , wherein those adjusted images respectively correspond to a plurality of folding modes of the display module.

19. The image processing method according to claim 12 , wherein the display module is formed by one single substrate.

20. The image processing method according to claim 12 , wherein the display module is formed by multi-substrates connected together.