Stretchable display devices and methods of compensating luminance of the same

Patent metadata

Field	Value
Publication number	US-9477339-B2
Application number	US-201514672011-A
Country	US
Kind code	B2
Filing date	Mar 27, 2015
Priority date	Sep 15, 2014
Publication date	Oct 25, 2016
Grant date	Oct 25, 2016

Abstract

A stretchable display device includes: a stretchable display panel including: pixels; a first resistive film extending in a first direction; and a second resistive film extending in a second direction; a scan driver to provide a scan signal to the pixels; a data driver to provide a data signal or a compensated data signal to the pixels; a row detection driver to detect a first current flowing through the first resistive film to generate a first detection signal; a column detection driver to detect a second current flowing through the second resistive film to generate a second detection signal; a compensation control signal generator to receive the first and the second detection signals to detect amounts of variations of the first and the second currents, and to generate a compensation control signal; and a timing controller to generate the compensated data signal based on the compensation control signal.

First claim

What is claimed is:

1. A stretchable display device comprising:
a stretchable display panel comprising:
a plurality of pixels;
at least one first resistive film extending in a first direction; and
at least one second resistive film extending in a second direction crossing the first direction on the stretchable display panel;

a scan driver configured to provide a scan signal to the pixels via a plurality of scan-lines;
a data driver configured to provide a data signal or a compensated data signal to the pixels via a plurality of data-lines;
a row detection driver configured to detect a first current flowing through the first resistive film to generate a first detection signal corresponding to the first current;
a column detection driver configured to detect a second current flowing through the second resistive film to generate a second detection signal corresponding to the second current;
a compensation control signal generator configured to receive the first detection signal to detect an amount of variation of the first current, to receive the second detection signal to detect an amount of variation of the second current, and to generate a compensation control signal based on the amount of the variation of the first current and the amount of the variation of the second current; and
a timing controller configured to control the scan driver and the data driver, and to generate the compensated data signal based on the compensation control signal,
wherein the compensation control signal includes at least one selected from a first digital signal and a second digital signal,
wherein the first digital signal corresponds to a row location of the pixels to which the compensated data signal is to be applied, and
wherein the second digital signal corresponds to a column location of the pixels to which the compensated data signal is to be applied.

2. The stretchable display device of claim 1 , wherein the first detection signal and the second detection signal are signals corresponding to respective voltages, and wherein each of the row detection driver and the column detection driver comprises at least one current-voltage conversion circuit.

3. The stretchable display device of claim 2 , wherein the compensation control signal generator comprises:
a first voltage comparator configured to compare the first detection signal with a first reference voltage to output a first comparison signal;
a second voltage comparator configured to compare the second detection signal with a second reference voltage to output a second comparison signal;
a first analog-digital converter configured to perform an analog-digital converting operation on the first comparison signal to generate the first digital signal; and
a second analog-digital converter configured to perform an analog-digital converting operation on the second comparison signal to generate the second digital signal.

4. The stretchable display device of claim 3 , wherein the compensation control signal generator further comprises:
a first voltage amplifier configured to amplify the first detection signal; and
a second voltage amplifier configured to amplify the second detection signal.

5. The stretchable display device of claim 3 , wherein the compensation control signal generator further comprises:
a third voltage amplifier configured to amplify the first comparison signal; and
a fourth voltage amplifier configured to amplify the second comparison signal.

6. The stretchable display device of claim 1 , wherein the first detection signal and the second detection signal are signals corresponding to respective currents, and wherein each of the row detection driver and the column detection driver comprises at least one current sensing circuit.

7. The stretchable display device of claim 6 , wherein the compensation control signal generator comprises:
a first current comparator configured to compare the first detection signal with a first reference current to output a first comparison signal;
a second current comparator configured to compare the second detection signal with a second reference current to output a second comparison signal;
a first analog-digital converter configured to perform an analog-digital converting operation on the first comparison signal to generate the first digital signal; and
a second analog-digital converter configured to perform an analog-digital converting operation on the second comparison signal to generate the second digital signal.

8. The stretchable display device of claim 7 , wherein the compensation control signal generator further comprises:
a first current amplifier configured to amplify the first detection signal; and
a second current amplifier configured to amplify the second detection signal.

9. The stretchable display device of claim 7 , wherein the compensation control signal generator further comprises:
a first voltage amplifier configured to amplify the first comparison signal; and
a second voltage amplifier configured to amplify the second comparison signal.

10. The stretchable display device of claim 1 , wherein the stretchable display device comprises an organic light emitting display device that comprises a power supply configured to provide a high power voltage and a low power voltage to the pixels via a plurality of power-lines.

11. The stretchable display device of claim 1 , wherein the stretchable display device comprises a liquid crystal display device that comprises a backlight unit configured to provide light to the stretchable display panel.

12. A stretchable display device comprising:
a stretchable display panel comprising:
a plurality of pixels;
at least one first resistive film extending in a first direction; and
at least one second resistive film extending in a second direction crossing the first direction on the stretchable display panel;

a scan driver configured to provide a scan signal to the pixels via a plurality of scan-lines;
a data driver configured to provide a data signal to the pixels via a plurality of data-lines;
a row detection driver configured to detect a first current flowing through the first resistive film to generate a first detection signal corresponding to the first current;
a column detection driver configured to detect a second current flowing through the second resistive film to generate a second detection signal corresponding to the second current;
a compensation control signal generator configured to receive the first detection signal to detect an amount of variation of the first current, to receive the second detection signal to detect an amount of variation of the second current, and to generate a compensation control signal based on the amount of the variation of the first current and the amount of the variation of the second current;
a timing controller configured to control the scan driver and the data driver; and a power supply configured to generate a compensated power voltage based on the compensation control signal, and to provide a power voltage or the compensated power voltage to the stretchable display panel via a plurality of power-lines,
wherein the compensation control signal includes at least one selected from a first digital signal and a second digital signal,
wherein the first digital signal corresponds to a row location of the pixels to which the compensated power voltage is to be applied, and
wherein the second digital signal corresponds to a column location of the pixels to which the compensated power voltage is to be applied.

13. The stretchable display device of claim 12 , wherein the stretchable display device comprises an organic light emitting display device,

Assignees

• Samsung Display Co Ltd

Inventors

• Hyun Chang-Ho

Classifications

• G06F3/045

  using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact · CPC title

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G2320/0223

  Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes · CPC title

• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title

• G09G2380/02

  Flexible displays · CPC title