US 12,136,386 B2
Display device capable of in-display sensing
Ping-Hung Yin, Hsinchu (TW); Jia-Shyang Wang, Miaoli County (TW); and Shih-Chan Tai, Kaohsiung (TW)
Assigned to Guangzhou Tyrafos Semiconductor Tech. Co., Ltd., Guangzhou (CN)
Filed by Guangzhou Tyrafos Semiconductor Technologies Co., Ltd., Guangzhou (CN)
Filed on Nov. 2, 2023, as Appl. No. 18/500,168.
Claims priority of provisional application 63/422,456, filed on Nov. 4, 2022.
Prior Publication US 2024/0153447 A1, May 9, 2024
Int. Cl. G09G 3/32 (2016.01); G09G 3/3208 (2016.01); G09G 3/3233 (2016.01); G09G 3/3275 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 3/3208 (2013.01); G09G 3/3233 (2013.01); G09G 3/3275 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2300/0852 (2013.01); G09G 2300/0861 (2013.01); G09G 2310/0208 (2013.01); G09G 2310/0251 (2013.01); G09G 2310/0291 (2013.01); G09G 2310/067 (2013.01); G09G 2310/08 (2013.01); G09G 2320/045 (2013.01); G09G 2360/14 (2013.01); G09G 2360/148 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A display device, comprising:
a plurality of sub-pixel areas, each comprising a sub-pixel circuit, each sub-pixel circuit further comprising:
a diode, configured to a forward-biasing state in a display phase of the sub-pixel circuit for emitting light and configured to a reverse-biasing state to sense a light of the sub-pixel circuit in a sensing phase, the diode having first and second electrodes;
a driving transistor, for driving the diode in the display phase, the driving transistor having a gate and first and second electrodes;
first to sixth transistors, gates of the first to sixth transistors being applied with gate control signals, so that the first to sixth transistors switch between the display phase and the sensing phase, each of the first to six transistors having first and second electrodes;
a capacitor, for storing a data voltage to be written to the diode in the display phase, the capacitor having first and second electrodes, the second electrode of the capacitor being connected to the first electrode of the sixth transistor;
a first node connected to the first electrode of the first transistor, the first electrode of the capacitor, the first electrode of the third transistor and the gate of the driving transistor being connected to the first node;
a second node connected to the second electrode of the second transistor, the first electrode of the diode and the second electrode of the fifth transistor being connected to the second node;
a third node connected to the second electrode of the third transistor, the first electrode of the fifth transistor and the second electrode of the driving transistor being connected to the third node;
a fourth node connected to the second electrode of the fourth transistor, the second electrode of the sixth transistor and the first electrode of the driving transistor being connected to the fourth node;
a fifth node connected to the second electrode of the first transistor, an initialization voltage being applied to the fifth node, the first electrode of the second transistor being connected to the fifth node;
a data voltage applied to the first electrode of the fourth transistor;
a driving voltage applied to the first electrode of the sixth transistor; and
a common voltage applied to the second electrode of the diode;
wherein the diode generates a photocurrent to an operational amplifier during the sensing phase so that the operational amplifier outputs a photocurrent output signal.