Fingerprint identification device, control method, touch display panel and touch display device
A touch display panel and fingerprint recognition technology, applied in the fields of fingerprint recognition devices and control methods, touch display panels, and touch display devices, can solve problems such as difficult fingerprint recognition, and achieve the effect of improving recognition difference and recognition accuracy
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Embodiment 1
[0037] This embodiment provides a fingerprint identification device, such as Figure 2-4 As shown, it includes: a photoelectric sensor 21 and an optical waveguide structure 22; the optical waveguide structure 22 is used to be arranged on the touch substrate to contact with the fingerprint. The optical waveguide structure 22 includes a dielectric material 23 and a waveguide material 24 arranged at intervals, and the sides of the dielectric material 23 and the waveguide material 24 away from the touch substrate 4 are both used for contacting with fingerprints, so as to inject light from the touch substrate 4 into the waveguide. The light from the material 24 propagates to the surface of the waveguide material 24 away from the touch substrate 4 after total reflection at the interface between the dielectric material 23 and the waveguide material 24 .
[0038] Specifically, such as figure 2 The fingerprint identification device shown includes a photoelectric sensor 21 disposed in...
Embodiment 2
[0040] This embodiment provides a fingerprint identification device, including: a photoelectric sensor 21 and an optical waveguide structure 22 for contacting with a fingerprint on the touch substrate 4; the optical waveguide structure 22 includes a dielectric material 23 and a waveguide material 24 arranged at intervals , wherein, the interface between the waveguide material 24 and the touch substrate 4 is the first interface, the interfaces between the waveguide material 24 and the two adjacent dielectric materials 23 are respectively the second interface and the third interface, and the waveguide material 24 The surface far away from the touch substrate 4 is the fourth interface; the fourth interface is used to contact the fingerprint, so that the light incident on the waveguide material 24 from the first interface is transmitted to the second interface and the third interface after multiple times of total reflection. On the four interfaces;
[0041]When the trough 11 of th...
Embodiment 3
[0059] This embodiment provides a touch display panel, such as Figure 9 As shown, it includes the above-mentioned fingerprint identification device, and also includes a touch display substrate, the optical waveguide structure 22 is arranged on the touch display surface of the touch display substrate, and the photoelectric sensor 21 is arranged on the touch display substrate away from the optical waveguide. One side of structure 22.
[0060] That is to say, the touch substrate 4 in this embodiment is a touch display substrate. Here, a liquid crystal touch display substrate is used as an example for illustration. See Figure 9 The liquid crystal layer 3 is between the color filter substrate 31 and the array substrate 32, the optical waveguide structure 22 is arranged on the color filter substrate 31, the photoelectric sensor 21 is arranged on the side of the array substrate 31 close to the color filter substrate 32, and the light from the backlight 33 After being injected from...
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