Electronic device for preventing display burn-in
An electronic device includes a housing including a cover glass and a back cover facing the cover glass, a display disposed inside the housing and including a plurality of pixels disposed in the display, a first printed circuit board interposed between the display and the back cover, a second printed circuit board interposed between the first printed circuit board and the back cover, a fingerprint sensor disposed on the first printed circuit board and configured to obtain fingerprint information of a user based on light reflected from a finger of the user making contact with the cover glass, and a processor disposed on the second printed circuit board and adjusting brightness of first-group pixels disposed at an area corresponding to the fingerprint sensor. The processor increases the brightness of the first-group pixels to be proportional to time in which the user makes contact with the cover glass with the finger.
1. An electronic device comprising:
a housing including a cover glass and a back cover facing the cover glass;
a display panel disposed inside the housing and including a plurality of pixels disposed in the display panel;
a first printed circuit board interposed between the display panel and the back cover;
a second printed circuit board interposed between the first printed circuit board and the back cover;
a fingerprint sensor disposed on the first printed circuit board and configured to obtain fingerprint information of a user based on light reflected from an external object making contact with the display panel; and
a processor disposed on the second printed circuit board and configured to adjust a brightness of first-group pixels disposed at a fingerprint sensing area corresponding to the fingerprint sensor,
wherein the processor is configured to:
attempt fingerprint authentication by emitting light of the first-group pixels with a first brightness when a touch is detected at the fingerprint sensing area of the display panel; and
increase the first brightness of the first-group pixels to a second brightness brighter than the first brightness each time the touch is detached from the fingerprint sensing area and then a re-touch is detected at the fingerprint sensing area, such that the second brightness gradually increases with each re-touch,
wherein while the touch is maintained, the brightness of the first-group pixels increases to be proportional to an elapsed time in which the touch is detected at the fingerprint sensing area.
2. The electronic device of claim 1 , wherein the processor is configured to:
decrease the brightness of the first-group pixels when the touch is detached from the fingerprint sensing area.
3. The electronic device of claim 1 , wherein the processor is configured to:
unlock a locked screen or perform a financial payment when the fingerprint authentication succeeds.
4. The electronic device of claim 1 , further comprising:
second-group pixels disposed on a remaining area of the display panel other than the fingerprint sensing area corresponding to the fingerprint sensor.
5. The electronic device of claim 4 , wherein the processor is configured to:
control the first-group pixels to emit light brighter than light emitted from the second-group pixels when the touch is detected at the fingerprint sensing area.
6. The electronic device of claim 1 , wherein the fingerprint sensor receives the reflected light through a hole formed in the first printed circuit board.
7. An electronic device comprising:
a housing including a cover glass and a back cover facing the cover glass;
a display panel disposed inside the housing and including a plurality of pixels disposed in the display panel;
a first printed circuit board interposed between the display panel and the back cover;
a second printed circuit board interposed between the first printed circuit board and the back cover;
a fingerprint sensor disposed on the first printed circuit board and configured to obtain fingerprint information of a user based on light reflected from an external object making contact with the display panel; and
a processor disposed on the second printed circuit board and configured to adjust a brightness of first-group pixels disposed at a fingerprint sensing area corresponding to the fingerprint sensor,
wherein the processor is configured to:
calculate a failure count that corresponds to a number of failed fingerprint authentication attempts even though a touch is detected at the fingerprint sensing area of the display panel;
set an initial brightness of the first-group pixels based on the failure count;
gradually increase the brightness of the first-group pixels as the failure count is increased; and
emit light of the first-group pixels with the increased brightness when the touch is detected at the fingerprint sensing area,
wherein when the touch is detected, the brightness of the first-group pixels increases to be proportional to the failure count.
8. The electronic device of claim 7 , further comprising:
second-group pixels disposed on a remaining area of the display panel other than the fingerprint sensing area corresponding to the fingerprint sensor.
9. The electronic device of claim 8 , wherein the processor is configured to:
control the first-group pixels to emit light brighter than light emitted from the second-group pixels when the touch is detected at the fingerprint sensing area.
10. The electronic device of claim 7 , wherein the fingerprint sensor receives the reflected light through a hole formed in the first printed circuit board.