Abstract: A display device includes: pixels each including sub-pixels; and a first and second DC lines. Each of the sub-pixels includes: a light emitting element; and a sub-pixel circuit connected to the light emitting element and the first and second DC lines. The sub-pixel circuit includes: a first transistor, where a gate electrode of the first transistor is connected to a first node and one electrode of the first transistor is connected to a second node; a storage capacitor connected between the first node and the second node; a first hold capacitor forming a first hold capacitance between the second node and the first DC line; and a second hold capacitor forming a second hold capacitance between the second node and the second DC line. In sub-pixels which provide light of a same color, a sum of the first capacitance is equal to a sum of the second hold capacitance.

Abstract: A method of driving a display device is disclosed in which the display device includes a pixel and a photo sensing pixel. The method includes: performing a first sensing operation of emitting light by the pixel and operating the photo sensing pixel; performing a second sensing operation of not emitting light by the pixel and operating the photo sensing pixel; and calculating a compensation value for compensating degradation of the pixel based on first sensing data according to the first sensing operation and second sensing data according to the second sensing operation.

Abstract: A display device includes a display panel, display pixels arranged in a display area of the display panel, light sensing pixels in the display area together with the display pixels, infrared light emitting pixels in the display area together with the display pixels, a display scan driver to drive the display pixels and the light sensing pixels to emit light, a light sensing scan driver to drive the light sensing pixels to detect light, and a main driving circuit to detect pulse wave signals of a user using light sensing signals received through the light sensing pixels and to measure biometric information, wherein the main driving circuit is to separate and generate blood vessel image data from image data and to receive the light sensing signals of a light receiving area by distinguishing the light receiving area according to the blood vessel image data in the display area.

Abstract: A display device for measuring biometric information such as blood pressure by utilizing both display pixels and light sensing pixels within a display panel. The display device includes a main driving circuit that dynamically sets and adjusts light emission conditions, including emission color and luminance based on the user's touch area and shape, thereby optimizing the detection of biosignals such as pulse waves. The system enhances the signal-to-noise ratio (SNR) and improves the accuracy of biometric measurements.

Abstract: A blood pressure measurement method using a display device including: a display panel including first sub-pixels and second sub-pixels; a pressure sensor to sense a pressure applied from the outside; and a photo-sensor to sense light, includes: generating a first pulse wave signal according to light emitted by the first sub-pixels and sensed by the photo-sensor; generating a second pulse wave signal according to light emitted by the second sub-pixels and sensed by the photo-sensor; generating a third pulse wave signal by removing noise from the second pulse wave signal based on the first pulse wave signal, the second pulse wave signal, and a maximum value of the first pulse wave signal; and calculating blood pressure information based on the third pulse wave signal and a pressure measurement value sensed by the pressure sensor. The blood pressure information is displayed on the display panel.

Abstract: A display device is provided that includes a plurality of pixels, a plurality of optical sensors, an emission line connected to the pixels, and an emission driver connected to the emission line. The emission driver outputs a first emission signal to the emission line having a first frame frequency in a first mode for displaying an image using the pixels and outputs a second emission signal to the emission line having a second frame frequency in a second mode for sensing light using the optical sensors. The second frame frequency is different from the first frame frequency.

Abstract: A display device includes a display panel including a plurality of light emitting elements, a cover glass covering an upper surface of the display panel and including a first area overlapping the display panel and a second area adjacent to the first area, a black matrix overlapping the second area of the cover glass, a pressure sensor overlapping the black matrix under the cover glass and configured to sense a pressure applied through the cover glass, and a set frame covering a lower surface of the display panel. The set frame includes a support contacting the pressure sensor on an upper surface of the set frame facing the cover glass.

Abstract: A display device including: display pixels arranged in a display area of a display panel; light sensing pixels arranged in the display area; a display scan driver configured to cause the display pixels to emit light; a light sensing scan driver configured to cause the light sensing pixels to sense light; and a main driving circuit configured to measure a user's biometric information by using light sensing signals provided from the light sensing pixels, wherein the main driving circuit senses the user's touch area when the user's biometric information is measured, and sets a biometric information measurement area and a measurement condition, which includes an emission color and an emission luminance, according to a shape of a sensed touch area and touch area information to measure the user's biometric information.

Abstract: Provided is a display device including a plurality of normal display pixel, one boost display pixel having a higher maximum luminance than the plurality of normal display pixels, and one light-receiving pixel disposed adjacent to the boost display pixel. Each of the normal display pixel, the boost display pixel, and the light-receiving pixel includes a first electrode, a second electrode, and an active layer, which is interposed between the first and second electrodes. The first electrodes of the normal display pixel, the boost display pixel, and the light-receiving pixel are disposed in the same layer. The second electrodes of the normal display pixel, the boost display pixel, and the light-receiving pixel are integrally connected to one another.

Abstract: A pulse wave generation apparatus includes a pressure sensor sensing an external pressure, an optical adjustment unit configured to change a transmissivity of light, a reflection unit reflecting the light, and a control unit outputting an optical adjustment signal for changing the transmissivity based on a pressure measurement value received from the pressure sensor to the optical adjustment unit.

Abstract: A blood pressure measurement method using a display device including: a display panel including first sub-pixels and second sub-pixels; a pressure sensor to sense a pressure applied from the outside; and a photo-sensor to sense light, includes: generating a first pulse wave signal according to light emitted by the first sub-pixels and sensed by the photo-sensor; generating a second pulse wave signal according to light emitted by the second sub-pixels and sensed by the photo-sensor; generating a third pulse wave signal by removing noise from the second pulse wave signal based on the first pulse wave signal, the second pulse wave signal, and a maximum value of the first pulse wave signal; and calculating blood pressure information based on the third pulse wave signal and a pressure measurement value sensed by the pressure sensor. The blood pressure information is displayed on the display panel.

Abstract: A display device includes: a first area including a plurality of first pixels; a second area adjacent to the first area, and including a plurality of second pixels; a first photo sensor adjacent to the plurality of first pixels at the first area, and to sense light; and a second photo sensor adjacent to the plurality of second pixels at the second area, and to sense light. A size of an area of the second photo sensor is different from a size of an area of the first photo sensor.

Abstract: The blood pressure measurement method using a display device includes generating a first pulse wave frequency signal having a magnitude of a pulse wave signal according to a frequency having a fundamental wave component and a harmonics component based on a pressure measurement value and a pulse wave signal, calculating a coefficient of a transfer function based on center frequencies and maximum gains at center frequencies of first harmonics to third harmonics of the first pulse wave frequency signal, generating a second pulse wave frequency signal by blocking noise components of the first harmonics to the third harmonics of the first pulse wave frequency signal based on the transfer function, generating a first pulse wave signal having a magnitude of a pulse wave signal according to a pressure based on the second pulse wave frequency signal, and calculating blood pressure information based on the first pulse wave signal.

Abstract: A display device is provided. The display device includes a display panel including a pixel configured to display an image and a photo-sensor configured to sense incident light, a pressure sensor disposed on one surface of the display panel and configured to sense a pressure applied via a portion of a user’s body, and a processor. The processor is configured to generate a pulse wave signal according to an amount of incident light sensed by the photo-sensor and an optical signal corresponding to the amount of incident light in response to determining that a pressure measurement value corresponding to the pressure is within a pressure request range corresponding to a pressure interval, and calculate blood pressure information based on the pulse wave signal.

Abstract: A display device is provided that includes a plurality of pixels, a plurality of optical sensors, an emission line connected to the pixels, and an emission driver connected to the emission line. The emission driver outputs a first emission signal to the emission line having a first frame frequency in a first mode for displaying an image using the pixels and outputs a second emission signal to the emission line having a second frame frequency in a second mode for sensing light using the optical sensors. The second frame frequency is different from the first frame frequency.

Abstract: A display device capable of measuring a user's blood pressure by analyzing a photoplethysmographic signal is disclosed. The display device includes a display panel including a plurality of pixels; a force sensor disposed on a surface of the display panel, the force sensor configured to sense an external force; a light receiving sensor disposed between a group of neighboring pixels of the plurality of pixels, or disposed in a through hole in a front portion of the display panel, the light receiving sensor configured to sense an amount of light reflected toward the display panel and generate an optical signal corresponding to the amount of light; and a main processor configured to generate a pulse wave signal according to the optical signal received from the light receiving sensor and analyze a magnitude, a period, and a wave change of the pulse wave signal.

Abstract: A display device measures a user's blood pressure by detecting a photoplethysmography signal. A display device includes a display panel that includes a through hole and a pixel area that surrounds the through hole and includes pixels that display an image, a pressure sensor disposed on a surface of the display panel and configured to sense an externally applied pressure, a light-emitting member disposed at a position that overlaps the through hole of the display panel and outputs light toward a front side of the display panel through the through hole, and a light-receiving sensor that faces the front side of the display panel and is configured to sense light reflected from the front side of the display panel toward the display panel.