Full-screen display device with different unit pixels for emitting and receiving light
View Patent ↗A full-screen display device has different unit pixels for emitting and receiving light, including a water-oxygen barrier layer, a protective panel, a plurality of unit pixels, a light-shielding layer, and a plurality of lenses. When the device performs biometric recognition, at least one unit pixel is defined as a light-emitting element, at least one unit pixel is defined as a sensing element, and the sensing element has a light-sensing area. The light-emitting element emits an incident light to penetrate the water-oxygen barrier layer and scatter outwardly by at least one lens. The scattered incident light penetrates the protective panel, and is then reflected by a test object, followed by penetrating the protective panel, and entering at least one lens, which converges the reflected light. The converged light penetrates the water-oxygen barrier layer to be received by the light-sensing area and converted into an image electrical signal.
1. A full-screen display device with different unit pixels for emitting and receiving light, comprising:
a water and oxygen barrier layer;
a protective panel, disposed above the water and oxygen barrier layer;
a plurality of unit pixels, arranged below the water and oxygen barrier layer, at least one of the unit pixels being defined as a light-emitting element and at least one of the unit pixels being defined as a sensing element when the full-screen display device performs biometric recognition, and the sensing element having a light-sensing area;
a light-shielding layer, disposed on a first surface of the water and oxygen barrier layer and having a plurality of openings to expose at least part of each of the unit pixels; and
a plurality of lenses, disposed on the first surface of the water and oxygen barrier layer and located in the openings;
wherein each of the lenses is a microlens or a meta-lens and a size of the light-sensing area is obtained through the following conditions: (1) a curved surface of the microlens is a spherical surface, an aspherical surface or an asymmetric free-form surface, or the meta-lens comprises a nanometer microstructure;
(
B
A
)
×
0.001
mm
<
D
<
(
A
B
)
×
1000
mm
;
(
2
)
(
B
3.5
×
A
)
)
×
0.001
mm
<
H
<
(
7.
×
A
B
)
×
10
mm
;
(
3
)
0.00005
<
B
A
<
0.99995
;
(
4
)
(
B
A
)
×
0.001
÷
2
mm
<
R
<
(
A
B
)
×
1000
m
;
(
5
)
and
Z
2
≤
Z
1
;
(
6
)
where A is a size of a unit pixel, B is the size of the light-sensing area, D is a thickness of the water and oxygen barrier layer, H is a height of the microlens, R is a curvature of the microlens, and Z1 is a diameter of the microlens, and Z2 is a diameter of each of the openings; and
wherein the unit pixel defined as the light-emitting element emits an incident light, the incident light passing through the water and oxygen barrier layer and scattering outwardly through at least one of the lenses, and the scattered incident light passing through the protective panel and then reflected by a test object to generate a reflected light; the reflected light passing through the protective panel, entering at least one of the lenses and being converged; and the converged reflected light travels along a converged light path and passes through the water and oxygen barrier layer to be received by the light-sensing area and converted into an image electrical signal.
2. The full-screen display device according to claim 1 , further comprising a light-absorbing layer disposed between the unit pixel defined as the sensing element and the water and oxygen barrier layer, and the light-absorbing layer defining a through hole, the light-sensing area being located below the through hole, and the light-absorbing layer not absorbing the emission wavelength defined by the unit pixel of the sensing element.
3. The full-screen display device according to claim 2 , wherein the through hole is disposed on a converged light path of one of the lenses and is located at the center of the light-absorbing layer, and the light-sensing area is located at the center of the unit pixel defined as the sensing element.
4. The full-screen display device according to claim 1 , wherein the unit pixels include a plurality of red light unit pixels, a plurality of blue light unit pixels, and a plurality of green light unit pixels; wherein, when the full-screen display device performs biometric recognition, the unit pixels defined as the light-emitting elements are the blue light unit pixels, the unit pixels defined as the sensing elements are the red light unit pixels, and the green light unit pixels are defined as inactive unit pixels.
5. The full-screen display device according to claim 1 , wherein the unit pixels include a plurality of red light unit pixels, a plurality of blue light unit pixels, and a plurality of green light unit pixels; wherein, when the full-screen display device performs biometric recognition, the unit pixels defined as the light-emitting elements are the blue light unit pixels, the unit pixels defined as the sensing elements are the green light unit pixels, and the red light unit pixels are defined as inactive unit pixels.
6. The full-screen display device according to claim 1 , wherein the unit pixels include a plurality of red light unit pixels, a plurality of blue light unit pixels, and a plurality of green light unit pixels; wherein, when the full-screen display device performs biometric recognition, the unit pixels defined as the light-emitting elements are the green light unit pixels, the unit pixels defined as the sensing elements are the red light unit pixels, and the blue light unit pixels are defined as inactive unit pixels.
7. The full-screen display device according to claim 1 , further comprising an organic light-emitting diode, disposed on or below a second surface of the water and oxygen barrier layer and comprising the plurality of unit pixels.