Display device including a force sensor, a light receiving sensor, and a main processor

A method for using a display device including:

• receiving a force signal from a force sensor disposed under a display panel that includes a touch electrode layer having touch electrodes for sensing a touch of an object, the force sensor being distinct from the display panel and the touch electrode layer, the force sensor generating the force signal based on an external force;
• emitting light from a light emitting member disposed under the display panel and the force sensor;
• receiving an optical signal from a light receiving sensor disposed under the display panel and the force sensor, the optical signal sensing an amount of light emitted from the light emitting member and reflected off an object disposed above the display panel through a through hole penetrating the display panel and an optical hole penetrating through the force sensor and generating the optical signal corresponding to the amount of the light, wherein the optical hole of the force sensor exposes an entirety of the light emitting member and the light receiving sensor;
• generating, using a main processor, a pulse wave signal according to the optical signal;
• determining, using the main processor, a period of the pulse wave signal by identifying a wave period, wherein a highest pulse wave value, a reflected pulse wave value, and a lowest pulse wave value sequentially occur in the wave period;
• determining, using the main processor, a plurality of benchmarks including at least a pulse wave value ratio and a reflected pulse wave difference, wherein the pulse wave value ratio is determined based on a ratio of the reflected pulse wave value to the highest pulse wave value (RI ratio) during the period of the pulse wave signal, and the reflected pulse wave difference is determined based on a difference between a blood pressure at a time point when the highest pulse wave value is detected and a blood pressure at a time point when the reflected pulse wave value is detected;
• generating, using the main processor, benchmark data by continuously storing and measuring a change in a benchmark;
• detecting, using the main processor, a start time of a change period and a start time of a second period by analyzing fluctuations of the benchmark;
• setting, using the main processor, a diastolic blood pressure according to a pulse wave signal detection value at the start time of the change period;
• setting, using the main processor, a systolic blood pressure according to a pulse wave signal detection value at a start time of the second period after the change period;
• and
• setting, using the main processor, a mean blood pressure according to a pulse wave signal detection value in either the period of the pulse wave signal or the second period.

An electronic device, comprising:

• a display device including:
• a display panel comprising a plurality of pixels, the display panel including a through hole penetrating the display panel, the display panel further including a touch electrode layer having touch electrodes for sensing a touch of an object;
• a force sensor disposed on a surface of the display panel, distinct from the display panel and the touch electrode layer, the force sensor configured to sense an external force, the force sensor including an optical hole overlapping the through hole in a thickness direction of the display device;
• a light receiving sensor configured to sense an amount of light reflected toward the display panel through the through hole of the display panel and the optical hole of the force sensor and generate an optical signal corresponding to the amount of the light;
• and
• a light emitting member disposed alongside the light receiving sensor, with both the light emitting member and the light receiving sensor overlapping the optical hole of the force sensor such that the optical hole of the force sensor exposes an entirety of the light emitting member and the light receiving sensor,
• wherein the electronic device further includes 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.