Integrated photo-sensing detection display apparatus and method of fabricating integrated photo-sensing detection display apparatus

A method of driving photo-sensing detection in an integrated photo-sensing detection display substrate comprising a base substrate;

• a plurality of light emitting elements on the base substrate and configured to emit light, a portion of the light being totally reflected by a surface thereby forming totally reflected light;
• an addressable grating layer on a side of the base substrate away from the plurality of light emitting elements, and comprising a plurality of individually addressable grating regions, light redirection diffraction respectively in the plurality of individually addressable grating regions being independently controllable;
• a photosensor on a side of the addressable grating layer away from the base substrate and configured to detect light transmitted from one or more of the plurality of individually addressable grating regions, thereby detecting fingerprint information;
• and a pixel definition layer defining a plurality of subpixel apertures;
• wherein the integrated photo-sensing detection display substrate has a subpixel region and an inter-subpixel region;
• the integrated photo-sensing detection display substrate further comprises a light shielding layer between the plurality of light emitting elements and the base substrate configured to block at least a portion of diffusedly reflected light from passing through, the light shielding layer having a light path aperture in the inter-subpixel region allowing at least a portion of the totally reflected light to pass through thereby forming a signal-enriched light beam;
• the addressable grating layer is configured to redirect the signal-enriched light beam thereby forming a redirected light beam;
• the photosensor is configured to detect the redirected light beam, thereby detecting fingerprint information;
• the integrated photo-sensing detection display substrate comprises an inter-subpixel aperture in the inter-subpixel region and extending through the pixel definition layer, allowing at least a portion of the totally reflected light to pass through sequentially the inter-subpixel aperture and the light path aperture, the pixel definition layer being absent in the inter-subpixel aperture;
• the inter-subpixel aperture is smaller than the light path aperture;
• and
• the inter-subpixel aperture forms a continuous network extending throughout an entirety of the integrated photo-sensing detection display substrate;
• wherein the method comprises selectively switching on at least a first individually addressable grating region to redirect a portion of the totally reflected light to the photosensor, and selectively switching off at least a second individually addressable grating region so that substantially no light transmitted through the second individually addressable grating region.