MICRO-LED DISPLAY PANEL AND MICRO DISPLAY SYSTEM
A micro-LED display panel includes a micro-LED display chip including a micro-LED array area and an IC (integrated circuit) backplane, wherein the micro-LED array area is provided on the IC backplane; an image light rotating element including a transmission lens assembly provided above the micro-LED display chip and including a transmission lens over the micro-LED array area; and a lens position rotating actuator configured to rotate the transmission lens about at least one preset axis, wherein the at least one preset axis is parallel to the micro-LED array area; and a holder provided on the micro-LED display chip and configured to support the transmission lens assembly.
1 . A micro-LED (light emitting diode) display panel comprising:
a micro-LED display chip comprising a micro-LED array area and an IC (integrated circuit) backplane, wherein the micro-LED array area is provided on the IC backplane;
an image light rotating element comprising:
a transmission lens assembly provided above the micro-LED display chip and comprising a transmission lens over the micro-LED array area; and
a lens position rotating actuator configured to rotate the transmission lens about at least one preset axis, wherein the at least one preset axis is parallel to the micro-LED array area; and
a holder provided on the micro-LED display chip and configured to support the transmission lens assembly.
2 . The micro-LED display panel according to claim 1 , wherein the holder is provided on the IC backplane.
3 . The micro-LED display panel according to claim 2 , wherein the holder is configured to support the transmission lens assembly at an edge of the transmission lens assembly.
4 . The micro-LED display panel according to claim 1 , wherein the preset axis is a first axis, wherein the first axis is parallel to the micro-LED array area in a first direction.
5 . The micro-LED display panel according to claim 4 , wherein the lens position rotating actuator is further configured to rotate the transmission lens about a second axis, wherein the second axis is parallel to the micro-LED array area in a second direction, and the second axis is not parallel to the first axis.
6 . The micro-LED display panel according to claim 5 , wherein the first axis is perpendicular to the second axis.
7 . The micro-LED display panel according to claim 5 , wherein the transmission lens assembly further comprises:
a first frame;
a second frame provided inside the first frame and connected with the first frame by a first pair of connecting bridges along the first axis; and
a third frame provided inside the second frame and connected with the second frame by a second pair of connecting bridges along the second axis;
wherein the transmission lens is supported by the third frame and configured to be rotated with the third frame.
8 . The micro-LED display panel according to claim 7 , wherein the holder is configured to support the transmission lens assembly by supporting the first frame.
9 . The micro-LED display panel according to claim 1 , wherein, when rotating, the transmission lens and the micro-LED array area do not contact each other.
10 . The micro-LED display panel according to claim 9 , wherein a distance between a bottom of the transmission lens and a top of micro-LED array area is not less than 1 μm.
11 . The micro-LED display panel according to claim 1 , wherein the lens position rotating actuator further comprises one or more magnetic elements provided between the transmission lens assembly and the micro-LED chip.
12 . The micro-LED display panel according to claim 11 , wherein the one or more magnetic elements are provided on the IC backplane and under an edge of the transmission lens assembly.
13 . The micro-LED display panel according to claim 12 , wherein the transmission lens assembly further comprises:
a first frame;
a second frame provided inside the first frame and connected with the first frame by a first pair of connecting bridges along a first axis; and
a third frame provided inside the second frame and connected with the second frame by a second pair of connecting bridges along a second axis;
wherein the transmission lens is supported by the third frame and configured to be rotated with the third frame.
14 . The micro-LED display panel according to claim 13 , wherein the one or more magnetic elements are provided under an edge of the first frame.
15 . The micro-LED display panel according to claim 14 , wherein a first one of the one or more magnetic elements is provided at a first edge of the IC backplane, a second one of the one or more magnetic elements is provided at a second edge of the IC backplane, and the first edge is perpendicular to the second edge.
16 . The micro-LED display panel according to claim 14 , wherein a first one of the one or more magnetic element is configured to generate a first magnetic field, a second one of the one or more magnetic elements is configured to generate a second magnetic field, wherein the first magnetic field is perpendicular to the second magnetic field.
17 . The micro-LED display panel according to claim 16 , wherein the holder and the first and second magnetic elements are spaced apart.
18 . The micro-LED display panel according to claim 17 , wherein each of the first and second magnetic elements is an electromagnetic coil or a capacitance magnetic element.
19 . The micro-LED display panel according to claim 1 , wherein one or more of the holders are provided at one or more corners of the IC backplane.
20 . The micro-LED display panel according to claim 1 , wherein a top of the holder is higher than a top of the micro-LED array area.
21 . The micro-LED display panel according to claim 1 , wherein the micro-LED display chip is an AM (active matrix) micro-LED display chip or PM (passive matrix) micro-LED display chip.
22 . The micro-LED display panel according to claim 1 , wherein a diagonal length of the micro-LED array area is not greater than 1 cm.
23 . The micro-LED display panel according to claim 1 , wherein a material of the transmission lens is inorganic-glass or resin glass.
24 . The micro-LED display panel according to claim 1 , wherein the micro-LED display panel is applied in a micro display device or a micro sensor.
25 . The micro-LED display panel according to claim 1 , wherein a diagonal length of the micro-LED display panel is not greater than 5 μm; and a diagonal length of the micro-LED array area is not greater than 5 cm.
26 . The micro-LED display panel according to claim 1 , wherein the transmission lens is an optical lens; and image light emitted from the micro-LED array area is transmitted through the transmission lens in a changeable direction corresponding to a rotating direction of the transmission lens.
27 . The micro-LED display panel according to claim 1 , wherein a diagonal length of the transmission lens is not less than a diagonal length of the micro-LED array area.
28 . The micro-LED display panel according to claim 1 , wherein the image light rotating element further comprises an actuator controller electrically connected with the lens position rotating actuator and configured to control a rotation direction and a rotating frequency of the transmission lens.
29 . A micro display system comprising:
a micro-LED (light emitting diode) display panel comprising
a micro-LED display chip comprising a micro-LED array area and an IC (integrated circuit) backplane, wherein the micro-LED array area is provided on the IC backplane;
an image light rotating element comprising:
a transmission lens assembly provided above the micro-LED display chip and comprising a transmission lens over the micro-LED array area; and
a lens position rotating actuator configured to rotate the transmission lens about at least one preset axis, wherein the at least one preset axis is parallel to the micro-LED array area; and
a holder provided on the micro-LED display chip and configured to support the transmission lens assembly; and
a controlling unit connected with the IC backplane and the image light rotating element of the micro-LED display panel and configured to transmit objective image data to the IC backplane and the image light rotating element.
30 . The micro display system according to claim 29 , wherein the image light rotating element further comprises an actuator controller electrically connected with the lens position rotating actuator and configured to control a rotation direction and a rotating frequency of the lens position rotating actuator; and
the controlling unit is further connected with the actuator controller, and further configured to transmit signals to the IC backplane and the actuator controller.
31 . The micro display system according to claim 29 , wherein the controlling unit is further configured to process the objective image data to form N pieces of sub-image data, calculate a rotation direction and a rotating frequency of the transmission lens for each sub-image data according to a refresh frequency of the objective image data, send the rotation direction and the rotating frequency to the actuator controller, and send the sub-image data and the rotating frequency to the IC backplane; wherein N is an integer not less than two;
the actuator controller is configured to receive the rotation direction and the rotating frequency of the transmission lens for each piece of the sub-image data, and control the lens position rotating actuator and the transmission lens to perform a rotating process based on the rotation direction and the rotating frequency for each piece of the sub-image data; and
the IC backplane is configured to synchronously control the micro-LED array area to display a sub-image according to the sub-image data and the rotating frequency.
32 . The micro display system according to claim 31 , wherein each of pixel points in the micro-LED array area is separately formed in a corresponding pixel area, each of the pixel areas comprises N pieces of pixel sub-images, the pixel sub-images of a pixel point are shifted in a shifting order and in the pixel area of the pixel point, and the N pieces of pixel sub-images are shifted in a same shifting order with the pixel sub-images.
33 . The micro display system according to claim 32 , wherein the rotating frequency of sub-image data is M times the refresh frequency of the objective image data, wherein M being an integer not less than two.
34 . The micro display system according to claim 33 , wherein N is an even integer, and M is equal to N.
35 . The micro display system according to claim 33 , wherein the rotating frequency of the transmission lens is four times the refresh frequency of the objective image data.
36 . The micro display system according to claim 35 , wherein the refresh frequency of the objective image data is 50˜70 Hz.
37 . The micro display system according to claim 33 , wherein a shifting direction is a clockwise direction.
38 . The micro display system according to claim 32 , wherein sub-images formed by the sub-image data are the same as the objective image formed by the objective image data.
39 . The micro display system according to claim 38 , wherein a gray-scale of at least one of the pixel sub-images of the same pixel point is not the same as a gray-scale of the objective image of the same pixel point in the objective image data.
40 . The micro display system according to claim 38 , wherein a gray-scale of all of the pixel sub-images of the same pixel point is as same as a gray-scale of the objective image of the same pixel point in the objective image data.
41 . The micro display system according to claim 38 , wherein a relationship of a shifting distance of the sub-image from the objective image and a rotation angle of the transmission lens about an axis is
Δ
y
=
t
sin
θ
(
1
-
1
-
sin
2
θ
n
2
-
sin
2
θ
)
;
wherein Δy is the shifting distance, θ is the rotation angle, t is a center thickness of the transmission lens, and n is a refraction ratio of the transmission lens.
42 . The micro display system according to claim 41 , wherein the shifting distance between adjacent pixel sub-images is 50˜100% of a pixel pitch.
43 . A micro-LED (light emitting diode) display panel comprising:
a micro-LED display chip comprising a micro-LED array area and an IC (integrated circuit) backplane, wherein the micro-LED array area is provided on the IC backplane;
an image light rotating element comprising:
a transmission lens assembly provided above the micro-LED display chip and comprising a transmission lens over the micro-LED array area; and
a lens position rotating actuator configured to rotate the transmission lens about at least one preset axis, wherein the at least one preset axis is parallel to the micro-LED array area;
an external circuit plane provided at a bottom of the IC backplane and electrically connected with the IC backplane via a bonding wire; and
a holder provided on the external circuit plane and configured to support the transmission lens assembly.
44 . The micro-LED display panel according to claim 43 , wherein the external circuit plane comprises a flexible printed circuit.
45 . The micro-LED display panel according to claim 43 , wherein the holder is configured to support the transmission lens assembly at an edge of the transmission lens assembly.
46 . The micro-LED display panel according to claim 43 , wherein the preset axis is a first axis, and the first axis is parallel to the micro-LED array area in a first direction.
47 . The micro-LED display panel according to claim 46 , wherein the lens position rotating actuator is further configured to rotate the transmission lens about a second axis, the second axis is parallel to the micro-LED array area in a second direction, and the second axis is not parallel to the first axis.
48 . The micro-LED display panel according to claim 47 , wherein the first axis is perpendicular to the second axis.
49 . The micro-LED display panel according to claim 47 , wherein the transmission lens assembly further comprises:
a first frame;
a second frame provided inside the first frame and connected with the first frame by a first pair of connecting bridges along the first axis; and
a third frame provided inside the second frame and connected with the second frame by a second pair of connecting bridges along the second axis;
wherein the transmission lens is supported by the third frame and configured to be rotated with the third frame.
50 . The micro-LED display panel according to claim 49 , wherein the holder is configured to support the transmission lens assembly by supporting the first frame.
51 . The micro-LED display panel according to claim 43 , wherein when rotating, the transmission lens and the micro-LED array area do not contact each other.
52 . The micro-LED display panel according to claim 51 , wherein a distance between a bottom of the transmission lens and a top of micro-LED array area is not less than 1 μm.
53 . The micro-LED display panel according to claim 43 , wherein the lens position rotating actuator further comprises one or more magnetic elements provided between the transmission lens assembly and the micro-LED chip.
54 . The micro-LED display panel according to claim 53 , wherein the one or more magnetic elements are provided on the IC backplane and under an edge of the transmission lens assembly.
55 . The micro-LED display panel according to claim 54 , wherein the transmission lens assembly further comprises:
a first frame;
a second frame provided inside the first frame and connected with the first frame by a first pair of connecting bridges along a first axis; and
a third frame provided inside the second frame and connected with the second frame by a second pair of connecting bridges along a second axis;
wherein the transmission lens is supported by the third frame and configured to be rotated with the third frame.
56 . The micro-LED display panel according to claim 55 , wherein the one or more magnetic elements are provided under an edge of the first frame.
57 . The micro-LED display panel according to claim 56 , wherein a first one of the one or more magnetic elements is provided at a first edge of the IC backplane, and a second one of the one or more magnetic elements is provided at a second edge of the IC backplane, and the first edge is perpendicular to the second edge.
58 . The micro-LED display panel according to claim 56 , wherein a first one of the one or more magnetic elements is configured to generate a first magnetic field, and a second one of the one or more magnetic elements is configured to generate a second magnetic field, wherein the first magnetic field is perpendicular to the second magnetic field.
59 . The micro-LED display panel according to claim 57 , wherein the holder and the first and second magnetic elements are spaced apart.
60 . The micro-LED display panel according to claim 57 , wherein each of the first and second the magnetic elements is an electromagnetic coil or a capacitance magnetic element.
61 . The micro-LED display panel according to claim 43 , wherein one or more of the holders are provided at one or more corners of the IC backplane.
62 . The micro-LED display panel according to claim 43 , wherein a top of the holder is higher than a top of the micro-LED array area.
63 . The micro-LED display panel according to claim 43 , wherein the micro-LED display chip is an AM (active matrix) micro-LED display chip or PM (passive matrix) micro-LED display chip.
64 . The micro-LED display panel according to claim 43 , wherein a diagonal length of the micro-LED array area is not greater than 1 cm.
65 . The micro-LED display panel according to claim 43 , wherein a material of the transmission lens is inorganic-glass or resin glass.
66 . The micro-LED display panel according to claim 43 , wherein the micro-LED display panel is applied in a micro display device or a micro sensor.
67 . The micro-LED display panel according to claim 43 , wherein a diagonal length of the micro-LED display panel is not greater than 5 μm; and a diagonal length of the micro-LED array area is not greater than 5 cm.
68 . The micro-LED display panel according to claim 43 , wherein the transmission lens is an optical lens; and image light emitted from the micro-LED array area is transmitted through the transmission lens in a changeable direction corresponding to a rotating direction of the transmission lens.
69 . The micro-LED display panel according to claim 43 , wherein a diagonal length of the transmission lens is not less than a diagonal length of the micro-LED array area.
70 . The micro-LED display panel according to claim 43 , wherein the image light rotating element further comprises an actuator controller electrically connected with the lens position rotating actuator and configured to control a rotation direction and a rotating frequency of the transmission lens.
71 . A micro display system comprising:
a micro-LED (light emitting diode) display panel comprising:
a micro-LED display chip comprising a micro-LED array area and an IC (integrated circuit) backplane, wherein the micro-LED array area is provided on the IC backplane;
an image light rotating element comprising:
a transmission lens assembly provided above the micro-LED display chip and comprising a transmission lens over the micro-LED array area; and
a lens position rotating actuator configured to rotate the transmission lens about at least one preset axis, wherein the at least one preset axis is parallel to the micro-LED array area;
an external circuit plane provided at a bottom of the IC backplane and electrically connected with the IC backplane via a bonding wire; and
a holder provided on the external circuit plane and configured to support the transmission lens assembly; and
a controlling unit connected with the IC backplane and the image light rotating element of the micro-LED display panel and configured to transmit objective image data to the IC backplane and the image light rotating element.
72 . The micro display system according to claim 71 , wherein the image light rotating element further comprises an actuator controller electrically connected with the lens position rotating actuator and configured to control a rotation direction and a rotating frequency of the lens position rotating actuator; and
the controlling unit is further connected with the actuator controller, and further configured to transmit signals to the IC backplane and the actuator controller.
73 . The micro display system according to claim 71 , wherein the controlling unit is further configured to process the objective image data to form N pieces of sub-image data, calculate a rotation direction and a rotating frequency of the transmission lens for each sub-image data according to a refresh frequency of the objective image data, send the rotation direction and the rotating frequency to the actuator controller, and send the sub-image data and the rotating frequency to the IC backplane; wherein N is an integer not less than two;
the actuator controller is configured to receive the rotation direction and the rotating frequency of the transmission lens for each piece of the sub-image data, and control the lens position rotating actuator and the transmission lens to perform a rotating process based on the rotation direction and the rotating frequency for each piece of the sub-image data; and
the IC backplane is configured to synchronously control the micro-LED array area to display a sub-image according to the sub-image data and the rotating frequency.
74 . The micro display system according to claim 73 , wherein each of pixel points in the micro-LED array area is separately formed in a corresponding pixel area, each of the pixel areas comprises N pieces of pixel sub-images, the pixel sub-images of a pixel point are shifted in a shifting order and in the pixel area of the pixel point, and the N pieces of pixel sub-images are shifted in a same shifting order with the pixel sub-images.
75 . The micro display system according to claim 74 , wherein the rotating frequency of sub-image data is M times the refresh frequency of the objective image data, M being an integer and not less than two.
76 . The micro display system according to claim 75 , wherein N is an even integer, and M is equal to N.
77 . The micro display system according to claim 75 , wherein the rotating frequency of the transmission lens is four times the refresh frequency of the objective image data.
78 . The micro display system according to claim 75 , wherein the refresh frequency of the objective image data is 50˜70 Hz.
79 . The micro display system according to claim 75 , wherein a shifting direction is a clockwise direction.
80 . The micro display system according to claim 74 , wherein sub-images formed by the sub-image data are the same as the objective image formed by the objective image data.
81 . The micro display system according to claim 80 , wherein a gray-scale of at least one of the pixel sub-images of the same pixel point is not the same as a gray-scale of the objective image of the same pixel point in the objective image data.
82 . The micro display system according to claim 80 , wherein a gray-scale of all of the pixel sub-images of the same pixel point is as same as a gray-scale of the objective image of the same pixel point in the objective image data.
83 . The micro display system according to claim 80 , wherein a relationship of a shifting distance of the sub-image from the objective image and a rotation angle of the transmission lens about an axis is
Δ
y
=
t
sin
θ
(
1
-
1
-
sin
2
θ
n
2
-
sin
2
θ
)
;
wherein Δy is the shifting distance, θ is the rotation angle, t is a center thickness of the transmission lens, and n is a refraction ratio of the transmission lens.
84 . The micro display system according to claim 83 , wherein the shifting distance between adjacent pixel sub-images is 50˜100% of a pixel pitch.