Display device and driving method thereof

Abstract

The present disclosure provides a display device including a controlling unit, a display driver, a sensor driver, a display element, and a sensor element. The display driver and the sensor driver are electrically connected to the controlling unit respectively. The display element is electrically connected to the display driver, and the sensor element is electrically connected to the sensor driver. The sensor element is sensing a biometric feature in a sensing time period, and the sensing time period comprises 3 to 120 frame times. The display element is refreshed one time in each of the 3 to 120 frame times by the display driver, the sensor element is capable of receiving light emitted from the display element 3 to 120 times in the sensing time period, and the sensor driver receives a plurality of readout signals from the sensor element in an ending portion of the sensing time period.

What is claimed is: 
     
         1 . A display device, comprising:
 a controlling unit;   a display driver electrically connected to the controlling unit;   a sensor driver electrically connected to the controlling unit;   a display element electrically connected to the display driver; and   a sensor element electrically connected to the sensor driver;   wherein the sensor element is sensing a biometric feature in a sensing time period, the sensing time period comprises 3 to 120 frame times, the display element is refreshed one time in each of the 3 to 120 frame times by the display driver, the sensor element is capable of receiving light emitted from the display element 3 to 120 times in the sensing time period, and the sensor driver receives a plurality of readout signals from the sensor element in an ending portion of the sensing time period.   
     
     
         2 . The display device according to  claim 1 , wherein the display element is refreshed by the display driver 6 to 72 times in the sensing time period. 
     
     
         3 . The display device according to  claim 1 , wherein the sensor element is refreshed at least one time in the sensing time period. 
     
     
         4 . The display device according to  claim 1 , wherein the display element comprises a plurality of sub-pixels having a same color, and all the plurality of sub-pixels are turned on repeatedly in the sensing time period. 
     
     
         5 . The display device according to  claim 1 , wherein the display element comprises a plurality of sub-pixels, and a first group of the plurality of sub-pixels and a second group of the plurality of sub-pixels are turned on sequentially. 
     
     
         6 . The display device according to  claim 5 , wherein the first group of the plurality of sub-pixels and the second group of the plurality of sub-pixels have a same color. 
     
     
         7 . The display device according to  claim 5 , wherein the first group of the plurality of sub-pixels have a first color, and the second group of the plurality of sub-pixels have a second color different from the first color. 
     
     
         8 . The display device according to  claim 7 , wherein a third group of the plurality of sub-pixels having the first color, and the first group of the plurality of sub-pixels, the second group of the plurality of sub-pixels, the third group of the plurality of sub-pixels and the second group of the plurality of sub-pixels are turned on alternately. 
     
     
         9 . The display device according to  claim 1 , wherein the display element comprises a plurality of sub-pixels, a first group of the plurality of sub-pixels has a first color and a second group of the plurality of sub-pixels has a second color different from the first color, and the first group of the plurality of sub-pixels and the second group of the plurality of sub-pixels are turned on at a same time. 
     
     
         10 . The display device according to  claim 9 , wherein a third group of the plurality of sub-pixels has the first color, and the first group of the plurality of sub-pixels and the third group of the plurality of sub-pixels are turned on sequentially. 
     
     
         11 . The display device according to  claim 1 , wherein the sensor driver is activated by an enable signal from the controlling unit. 
     
     
         12 . The display device according to  claim 1 , wherein the display driver and the sensor driver are synchronized by the controlling unit. 
     
     
         13 . The display device according to  claim 1 , further comprising a processing unit, wherein the processing unit is electrically connected to the controlling unit, the display driver, and the sensor driver respectively, and the processing unit, the display driver and the sensor driver are integrated in a single integrated circuit. 
     
     
         14 . The display device according to  claim 1 , wherein the display element comprises a first sub-pixel having a first color and a second sub-pixel having a second color different from the first color, the sensor element comprises a sensing unit disposed between the first sub-pixel and the second sub-pixel, and a distance between the sensing unit and the first sub-pixel is less than a distance between the sensing unit and the second sub-pixel. 
     
     
         15 . The display device according to  claim 1 , wherein in one of the 3 to 120 frame times, one of sub-pixels of the display element emits a light pulse one time. 
     
     
         16 . The display device according to  claim 1 , wherein the display element comprises a plurality of light-emitting units, and the sensor element is disposed under the plurality of light-emitting units. 
     
     
         17 . The display device according to  claim 1 , further comprising a liquid crystal layer disposed between the display element and the sensor element. 
     
     
         18 . A driving method of a display device, comprising:
 providing a display control signal to a display driver and a sensor control signal to a sensor driver by a controlling unit;   transmitting a display driving signal to a display element by the display driver; and   transmitting a sensor driving signal to a sensor element by the sensor driver, wherein the sensor element is sensing a biometric feature in a sensing time period, the sensing time period comprises 3 to 120 frame times of the display element, the display element is refreshed one time in each of the 3 to 120 frame times by the display driver, the sensor element is capable of receiving light emitted from the display element 3 to 120 times in the sensing time period, and the sensor driver receives a plurality of readout signals from the sensor element in an ending portion of the sensing time period.   
     
     
         19 . The driving method of the display device according to  claim 18 , wherein the display element is refreshed by the display driver 6 to 72 times in the sensing time period. 
     
     
         20 . The driving method of the display device according to  claim 18 , wherein in one of the 3 to 120 frame times, one of sub-pixels of the display element emits a light pulse one time.