Texture recognition device and display device

A texture recognition device, comprising:

• a backlight element, configured to provide first backlight;
• a light constraint element, configured to perform a light divergence angle constraint process on the first backlight to obtain second backlight with a divergence angle within a preset angle range, wherein the second backlight is transmitted to a detection object;
• a photosensitive element, configured to detect the second backlight reflected by a texture of the detection object to recognize a texture image of the texture of the detection object;
• wherein the light constraint element comprises a collimating film, the collimating film has a mesh structure and comprises a plurality of hollowed-out regions, and each of the plurality of hollowed-out regions is configured to transmit part first backlight, whose divergence angle is within the preset angle range, of the first backlight to obtain the second backlight,
• wherein the backlight element comprises a second backlight module, the second backlight module comprises an edge-lit backlight light source, a light guide plate, a diffusion sheet, a first prism sheet, and a second prism sheet,
• the light guide plate is on a light exit side of the edge-lit backlight light source, the diffusion sheet is on a side of the light guide plate close to the light constraint element, the first prism sheet is on a side of the diffusion sheet close to the light constraint element, and the second prism sheet is on a side of the first prism sheet close to the light constraint element,
• the edge-lit backlight light source is configured to provide light source backlight, the light source backlight sequentially passes through the light guide plate, the diffusion sheet, the first prism sheet, and the second prism sheet to obtain intermediate backlight, and the first backlight comprises the intermediate backlight.

A texture recognition device, comprising:

• a backlight element, configured to provide first backlight;
• a light constraint element, configured to perform a light divergence angle constraint process on the first backlight to obtain second backlight with a divergence angle within a preset angle range, wherein the second backlight is transmitted to a detection object;
• a photosensitive element, configured to detect the second backlight reflected by a texture of the detection object to recognize a texture image of the texture of the detection object;
• wherein the backlight element comprises an edge-lit backlight light source and a light guide plate, the light guide plate is on a light exit side of the edge-lit backlight light source, the light constraint element comprises an inverse prism sheet, the inverse prism sheet is on a light exit side of the light guide plate,
• the edge-lit backlight light source is configured to provide light source backlight, and the light source backlight is transmitted through the light guide plate to obtain initial backlight, and the first backlight comprises the initial backlight;
• and
• the inverse prism sheet is configured to cause the first backlight to be refracted to obtain the second backlight.