OLED display device with fingerprint on display

An organic light emitting diode (OLED) display device with fingerprint on display (FOD) comprising:

• an OLED display panel comprising:
• a substrate;
• and
• a plurality of sub-pixels arranged in an array on the substrate;
• and
• a fingerprint recognition module disposed under the OLED display panel;
• wherein the substrate comprises an effective display area, the sub-pixels are located in the effective display area, a fingerprint recognition block is disposed in the effective display area, and the fingerprint recognition module is disposed corresponding to the fingerprint recognition block;
• a number of thin film transistors (TFTs) in each of the sub-pixels located in the fingerprint recognition block is less than a number of TFTs in each of the sub-pixels outside the fingerprint recognition block,
• wherein the substrate further comprises a frame area surrounding the effective display area, a first scan driving circuit and a second scan driving circuit are disposed in the frame area, the first scan driving circuit is configured to drive the sub-pixels in the fingerprint recognition block to emit light, and the second scan driving circuit is configured to drive the sub-pixels outside the fingerprint recognition block to emit light,
• wherein each of the sub-pixels outside the fingerprint recognition block comprises a third TFT, a fourth TFT, a fifth TFT, a sixth TFT, a seventh TFT, an eighth TFT, a ninth TFT, a second storage capacitor and a second OLED;
• a gate of the third TFT receives a first scan signal, a source of the third TFT is electrically connected to a second node, a drain of the third TFT is electrically connected to a third node;
• a gate of the fourth TFT receives a second scan signal, a source of the fourth TFT is electrically connected to the second node, a drain of the fourth TFT is electrically connected to a source of the seventh TFT;
• a gate of the fifth TFT receives a light emitting control signal, a source of the fifth TFT receives the power supply voltage, a drain of the fifth TFT is electrically connected to a source of the ninth TFT;
• a gate of the sixth TFT receives the light emitting control signal, a source of the sixth TFT is electrically connected to the third node, a drain of the sixth TFT is electrically connected to an anode of the second OLED;
• a gate of the seventh TFT receives a third scan signal, the source of the seventh TFT receives an initialization voltage, a drain of the seventh TFT is electrically connected to the anode of the second OLED;
• a gate of the eighth TFT receives the first scan signal, a source of the eighth TFT receives the data signal, a drain of the eighth TFT is electrically connected to the source of the ninth TFT;
• a gate of the ninth TFT is electrically connected to the second node, a drain of the ninth TFT is electrically connected to the third node;
• a first terminal of the second storage capacitor is electrically connected to the second node, a second terminal of the second storage capacitor is electrically connected to the source of the fifth TFT;
• a cathode of the second OLED is grounded;
• the first scan signal, the second scan signal, the third scan signal and the light emitting control signal are all provided by the second scan driving circuit.