Display device with stretchable structure and stretch compensation method

Abstract

This invention provides a display device and a stretch compensation method thereof. The display device includes a stretchable display panel, a display control circuit, an upper electrode, and a lower electrode. The upper electrode and the lower electrode form a capacitive deformation sensor. The display control circuit is coupled to the stretchable display panel. The display control circuit detects the deformation of the stretchable display panel through the capacitive deformation sensor to obtain the current capacitance value of the capacitive deformation sensor. Based on the current capacitance value of the capacitive deformation sensor, the display control circuit compensates for the original display data, thereby generating compensated display data for the stretchable display panel.

Claims

1. A display device, comprising: A stretchable display panel; Multiple upper electrodes are arranged at different positions on the stretchable display panel; multiple lower electrodes are arranged at different positions on the stretchable display panel, wherein the upper electrodes and the lower electrodes form at least one capacitive deformation sensor; and a display control circuit is coupled to the stretchable display panel, wherein the display control circuit detects the deformation of the stretchable display panel through the at least one capacitive deformation sensor to obtain a current capacitance value of the at least one capacitive deformation sensor, and the display control circuit compensates an original display data based on the current capacitance value of the at least one capacitive deformation sensor to generate compensated display data for the stretchable display panel, wherein the stretchable display panel includes: a first stretchable substrate, wherein the upper electrodes are arranged at different positions on the first stretchable substrate; Multiple display pixels are arranged at different positions on the first stretchable substrate; and a second stretchable substrate, wherein the second stretchable substrate, the upper electrodes, and the lower electrodes form the at least one capacitive deformation sensor, the lower electrodes are arranged at different positions on the second stretchable substrate, the second stretchable substrate has at least one main spacer, the at least one main spacer is disposed between the first stretchable substrate and the second stretchable substrate to form a cavity between the first stretchable substrate and the second stretchable substrate, the lower electrodes are disposed in the cavity, and in response to the second stretchable substrate being subjected to a stress, the stretchable display panel is stretched, the height of the cavity is changed, thereby changing the capacitance value between the upper electrodes and the lower electrodes.

2. The display device as claimed in claim 1, wherein the second stretchable substrate further comprises: At least one spacer, wherein the at least one spacer is disposed in the chamber; In response to the stretchable display panel being in a flat state, the at least one spacer of the second stretchable substrate does not contact the first stretchable substrate; And in response to the stretchable display panel becoming convex due to the stress, the stretchable display panel is stretched such that the at least one spacer of the second stretchable substrate contacts the first stretchable substrate.

3. The display device as claimed in claim 1, wherein the display control circuit looks up a compensation coefficient from a lookup table based on the current capacitance value of the at least one capacitive deformation sensor, and the display control circuit compensates the original display data based on the compensation coefficient to generate the compensated display data for the stretchable display panel.

4. The display device as claimed in claim 1, wherein the display control circuit calculates the compensated display data for the stretchable display panel based on the current capacitance value and the original display data.

5. The display device as claimed in claim 4, wherein the display control circuit generates the compensated display data by calculating the equation L' = (η*ε* I_OLED) / (C'*d), wherein L' is the compensated display data, η is the luminous efficiency of the display pixels of the stretchable display panel, ε is the dielectric constant, I_OLED is the original display data, C' is the current capacitance value, and d is the distance between the upper and lower electrodes.

6. A method for tensile compensation of a display device, comprising: The multiple upper electrodes of the display device are arranged at different positions on a stretchable display panel of the display device. Multiple lower electrodes of the display device are arranged at different positions on the stretchable display panel so that the upper electrodes and the lower electrodes form at least one capacitive deformation sensor; a display control circuit of the display device detects the deformation of the stretchable display panel through the at least one capacitive deformation sensor to obtain a current capacitance value of the at least one capacitive deformation sensor, wherein the display control circuit is coupled to the stretchable display panel. The display control circuit compensates for the original display data based on the current capacitance value of the at least one capacitive deformation sensor to generate compensated display data for the stretchable display panel. The stretchable display panel includes a first stretchable substrate, a plurality of display pixels, and a second stretchable substrate. The stretch compensation method further includes: arranging the upper electrodes at different positions on the first stretchable substrate; arranging the display pixels at different positions on the first stretchable substrate; forming the at least one capacitive deformation sensor from the second stretchable substrate, the upper electrodes, and the lower electrodes, wherein the second stretchable substrate has at least one main spacer, and the at least one main spacer is disposed between the first stretchable substrate and the second stretchable substrate to form a cavity between the first stretchable substrate and the second stretchable substrate; arranging the lower electrodes at different positions on the second stretchable substrate and in the cavity; and stretching the stretchable display panel in response to stress on the second stretchable substrate, changing the height of the cavity and thereby changing the capacitance value between the upper electrodes and the lower electrodes.

7. The tensile compensation method as claimed in claim 6, wherein the second stretchable substrate further includes at least one spacer, and the tensile compensation method further includes: The at least one spacer is disposed in the chamber, wherein, in response to the stretchable display panel being in a flat state, the at least one spacer of the second stretchable substrate does not contact the first stretchable substrate; and in response to the stretchable display panel being in a convex state due to the stress, the stretchable display panel is stretched such that the at least one spacer of the second stretchable substrate contacts the first stretchable substrate.

8. The tensile compensation method as described in claim 6 further includes: The display control circuit looks up a compensation coefficient from a lookup table based on the current capacitance value of the at least one capacitive deformation sensor. The display control circuit generates the compensated display data for the stretchable display panel by compensating the original display data based on the compensation coefficient.

9. The tensile compensation method as described in claim 6 further includes: The display control circuit calculates the compensated display data for the stretchable display panel based on the current capacitance value and the original display data.

10. The tensile compensation method as described in claim 9, further comprising: The compensated display data is generated by calculating the equation L' = (η*ε* I_OLED) / (C'*d) by the display control circuit, where L' is the compensated display data, η is the luminous efficiency of the display pixels of the stretchable display panel, ε is the dielectric constant, I_OLED is the original display data, C' is the current capacitance value, and d is the distance between the upper and lower electrodes.

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