Transparent display panel and transparent display

1. A transparent display panel, comprising:

a base; and

a plurality of sub-pixels disposed on the base, each sub-pixel including:

a light-emitting unit including at least one micro light-emitting diode (Micro-LED) and a control circuit connected to the at least one Micro-LED, the control circuit being configured to drive the at least one Micro-LED to emit light;

a light transmission portion disposed on at least one side of the light-emitting unit, the light transmission portion including at least one of a transparent insulating portion or an opening, wherein an area of the orthographic projection of the light transmission portion on the base is two to three times an area of the orthographic projection of the light-emitting unit on the base; and

at least one insulating layer disposed on the base, wherein the at least one insulating layer includes a plurality of openings each disposed in a respective one of the plurality of sub-pixels; and the openings penetrate through the at least one insulating layer at corresponding positions.

2. The transparent display panel according to claim 1 , wherein

the at least one insulating layer includes at least one organic insulating layer including the plurality of openings each disposed in the respective one of the plurality of sub-pixels;

the light transmission portion includes a corresponding opening; and

the openings penetrate through the at least one organic insulating layer at the corresponding positions.

3. The transparent display panel according to claim 2 , wherein the at least one insulating layer further includes at least one inorganic insulating layer, and materials of the base and the at least one inorganic insulating layer are transparent inorganic insulating materials; and

the light transmission portion further includes the transparent insulating portion composed of a portion of the at least one inorganic insulating layer.

4. The transparent display panel according to claim 1 , wherein

the at least one insulating layer includes at least one organic insulating layer and at least one inorganic insulating layer;

the openings penetrate through all the insulating layers at the corresponding positions; and

the light transmission portion is composed of a corresponding opening.

5. The transparent display panel according to claim 1 , further comprising a plurality of metal wires disposed in at least one layer between the at least one Micro-LED and the base, wherein an orthographic projection area of the plurality of metal wires on the base does not overlap an orthographic projection area of the light transmission portion on the base.

6. The transparent display panel according to claim 1 , wherein the control circuit includes at least one of an oxide thin film transistor or a low temperature poly-silicon thin film transistor.

7. The transparent display panel according to claim 1 , wherein the control circuit includes a switching transistor, a driving transistor and a capacitor;

a gate of the switching transistor is electrically connected to a scanning signal line, a first electrode of the switching transistor is electrically connected to a data signal line, and a second electrode of the switching transistor is electrically connected to a first electrode of the capacitor;

a gate of the driving transistor is electrically connected to the first electrode of the capacitor, a first electrode of the driving transistor is electrically connected to a first voltage terminal, and a second electrode of the driving transistor is electrically connected to a first electrode of a corresponding Micro-LED; and

a second electrode of the capacitor is electrically connected to the first voltage terminal.

8. The transparent display panel according to claim 1 , wherein each Micro-LED includes:

a P-type semiconductor layer, a light-emitting layer, and an N-type semiconductor layer which are stacked;

a first electrode in contact with the P-type semiconductor layer; and

a second electrode in contact with the N-type semiconductor layer.

9. A transparent display, comprising the transparent display panel according to claim 1 .