Display panel having LEDs emitting light of the same color and display apparatus
Embodiments of the present disclosure provide a display panel and a display apparatus. Display substrate includes: light-emitting device groups, light-transmitting part groups and optical structure elements. The light-emitting device groups are on a base substrate, each light-emitting device group includes micro light-emitting diodes including first and second micro light-emitting diodes each to emit light of preset color; each light-transmitting part group includes light-transmitting parts including a first and second color conversion parts; and each optical structure group is to direct light emitted from the first micro light-emitting diode to the first color conversion part, and direct light emitted from the second micro light-emitting diode to the second color conversion part. The first color conversion part is to convert light of the preset color into light of a first color, and the second color conversion part is to convert light of the preset color into light of a second color.
1 . A display panel, comprising: a plurality of light-emitting device groups, a plurality of light-transmitting part groups and a plurality of optical structure elements, wherein
the plurality of light-emitting device groups are disposed on a base substrate, each of the plurality of light-emitting device groups comprises a plurality of light-emitting diodes, the plurality of light-emitting diodes comprise a first light-emitting diodes and a second light-emitting diodes, and the first light-emitting diode and the second light-emitting diode are each configured to emit light of a preset color;
the plurality of light-transmitting part groups are disposed on a light-emitting side of the plurality of light-emitting device groups, each of the plurality of light-transmitting part groups comprises a plurality of light-transmitting parts, and the plurality of light-transmitting parts comprise a first color conversion part and a second color conversion part; and
the plurality of optical structure elements are disposed between the plurality of light-emitting device groups and the plurality of light-transmitting part groups, an orthographic projection of each of the plurality of optical structure elements on the base substrate entirely covers an orthographic projection of the plurality of light-emitting diodes of at least one of the plurality of light-emitting device groups on the base substrate, each of the plurality of optical structure elements is configured to direct light emitted from the first light-emitting diode to the first color conversion part, and direct light emitted from the second light-emitting diode to the second color conversion part, wherein the first color conversion part is configured to convert light of the preset color into light of a first color, and the second color conversion part is configured to convert light of the preset color into light of a second color,
wherein each of the plurality of optical structure elements is a condenser lens,
wherein the plurality of light-transmitting parts of each light-transmitting part group are arranged and sequentially numbered in a first direction, and the plurality of light-emitting diodes of each light-emitting device groups are arranged and sequentially numbered in a same order as the plurality of light-transmitting parts in the first direction, and
wherein for any light-emitting device group, after passing through the optical structure element, light emitted from a i th light-emitting diode is radiated to a (m−i+1) th light-transmitting part of a corresponding light-transmitting part group, where m is a number of the plurality of light-transmitting parts of the light-transmitting part group, i is an integer, 1≤i≤m and m>1.
2 . The display panel according to claim 1 , wherein the light of the first color is different from the light of the second color in wavelength range.
3 . The display panel according to claim 1 , wherein the plurality of light-emitting diodes of the light-emitting device group further comprise: a third light-emitting diode configured to emit light of the preset color,
the plurality of light-transmitting parts in the light-transmitting part group further comprise a light-passing part, the orthographic projection of each of the plurality of optical structure elements on the base substrate further covers an orthographic projection of the third light-emitting diode on the base substrate, and
each of the plurality of optical structure elements is further configured to direct light emitted from the third light-emitting diode to the light-passing part.
4 . The display panel according to claim 3 , wherein the light of the preset color is blue light, the light of the first color is red light, and the light of the second color is green light.
5 . The display panel according to claim 1 , wherein the plurality of light-emitting diodes of each light-emitting device group further comprise: a third light-emitting diode configured to emit light of the preset color,
the plurality of light-transmitting parts of the light-transmitting groups further comprise a third color conversion part, the orthographic projection of each of the plurality of optical structure elements on the base substrate further covers an orthographic projection of the third light-emitting diode on the base substrate, and
each of the plurality of optical structure elements is further configured to direct light emitted from the third light-emitting diode to the third color conversion part, and the third color conversion part is configured to convert light of the preset color into light of a third color.
6 . The display panel according to claim 5 , wherein the light of the preset color is ultraviolet light, the light of the first color is red light, the light of the second color is green light, and the light of the third color is blue light; or
the light of the preset color is blue light having a first wavelength, the light of the first color is red light, the light of the second color is green light, the light of the third color is blue light having a second wavelength, and the first wavelength is less than the second wavelength.
7 . The display panel according to claim 1 , wherein the display panel further comprises;
light-transmitting carriers in one-to-one correspondence with the plurality of light-emitting device groups, and the light-transmitting carriers corresponding to different light-emitting device groups are arranged at intervals; and
a barrier layer on a side of the light-transmitting carriers facing the base substrate, wherein a plurality of accommodation openings are provided in the barrier layer, and the plurality of light-emitting diodes of the light-emitting device group are in the plurality of accommodation openings in one-to-one correspondence.
8 . The display panel according to claim 7 , wherein a light-shielding layer is provided between any adjacent two of the light-transmitting carriers.
9 . The display panel according to claim 7 , wherein the light-emitting diode comprises:
a first electrode on a side of the light-transmitting carriers facing the base substrate;
a light-emitting stack on a side of the first electrode away from the light-transmitting carriers and comprising: a first-type doped semiconductor layer, a quantum well layer and a second-type doped semiconductor layer sequentially arranged in a direction away from the light-transmitting carriers; and
a second electrode on a side of the light-emitting stack away from the light-transmitting carriers.
10 . The display panel according to claim 1 , wherein the display panel further comprises:
a packaging layer on a side of the plurality of light-emitting device groups away from the base substrate; and
a filling layer between the packaging layer and the plurality of optical structure elements;
a spacer substrate between the plurality of optical structure elements and the plurality of light-transmitting part groups;
wherein the optical structure element has a refractive index greater than the filling layer, a surface of the optical structure element facing the filling layer is a convex curved surface that is attached to the filling layer.
11 . The display panel according to claim 1 , wherein the display panel further comprises:
a packaging layer on a side of the plurality of light-emitting device groups away from the base substrate, wherein the plurality of optical structure elements are disposed on a surface of the packaging layer away from the base substrate; and
a spacer substrate between the plurality of optical structure elements and the plurality of light-transmitting part groups and provided with recesses in one-to-one correspondence with the optical structure elements,
wherein a surface of the optical structure element facing the spacer substrate is a convex curved surface that is attached to a corresponding recess, and the optical structure element has a refractive index greater than the spacer substrate.
12 . The display panel according to claim 1 , wherein a distance between the plurality of light-emitting diodes and the plurality of optical structure elements is 1 or 2 times a focal length of the condenser lenses, and
the condenser lens has a first surface and a second surface, and the second surface is a convex surface that is convex toward a respective one of the plurality of light-emitting device groups.
13 . The display panel according to claim 1 , wherein an orthographic projection of the first color conversion part on the base substrate has an area larger than an orthographic projection of the first light-emitting diode on the base substrate; and
an orthographic projection of the second color conversion part on the base substrate has an area larger than an orthographic projection of the second light-emitting diode on the base substrate.
14 . The display panel according to claim 1 , wherein the first color conversion part and the second color conversion part are each made of a material comprising a quantum dot material or a phosphor material.
15 . The display panel according to claim 1 , wherein the display panel further comprises: an accommodation structure layer having a plurality of accommodation grooves in which the plurality of light-transmitting parts are provided in one-to-one correspondence with the plurality of accommodation grooves.
16 . The display panel according to claim 1 , wherein the plurality of light-emitting diodes of each light-emitting device group are divided into at least one repetitive unit, each repetitive unit comprising: the third light-emitting diode, the second light-emitting diode and the first light-emitting diode sequentially arranged in the first direction.
17 . The display panel according to claim 1 , wherein the plurality of light-transmitting parts of each light-transmitting part group are divided into n first repetitive units arranged in a second direction, each repetitive unit comprising c light-transmitting parts arranged in a first direction; the plurality of light-emitting diodes of each light-emitting device group are divided into n second repetitive units arranged in the second direction, each repetitive unit comprising c light-emitting diodes arranged in the first direction; wherein the first direction intersects the second direction; and
for any light-emitting device group, after passing through the optical structure element, light emitted from a q th light-emitting diode of a j th second repetitive unit is radiated to a (c−q+1) th light-transmitting part of a (n−j+1) th first repetitive unit of a corresponding light-transmitting part group, where n and c are both integers greater than 1, q and j are both integers, 1≤q≤c and 1≤j≤n.
18 . The display panel according to claim 17 , wherein in each light-emitting device group, each second repetitive unit comprises: the third light-emitting diode, the second light-emitting diode, and the first light-emitting diode, the third light-emitting diode, the second light-emitting diode, and the first light-emitting diode sequentially arranged in the first direction; or,
in each light-emitting device group, some of the second repetitive units each comprise: the second light-emitting diode, the first light-emitting diode, and the third light-emitting diode sequentially arranged in the first direction, while remaining second repetitive units each comprise: the third light-emitting diode, the second light-emitting diode, and the first light-emitting diode sequentially arranged in the first direction; or,
in each light-emitting device group, some of the second repetitive units each comprise: the second light-emitting diode, the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode sequentially arranged in the first direction; while remaining second repetitive units each comprise: the second light-emitting diode, the third light-emitting diode, the second light-emitting diode, and the first light-emitting diode sequentially arranged in the first direction.
19 . A display apparatus, comprising the display panel according to claim 1 , and each of the plurality of light-emitting diodes is a micro light-emitting diode.
20 . The display panel according to claim 1 , wherein the condenser lens has a first surface and a second surface, and the second surface is a convex surface that is convex toward a respective one of the plurality of light-transmitting part groups.