Heat-dissipating plates and display devices

A display device comprising a display panel and a heat-dissipating plate, the heat-dissipating plate being mounted on the display panel, and the heat-dissipating plate comprising:

• a heat-dissipating plate body;
• a heat-dissipating microcavity embedded in the heat-dissipating plate body;
• and
• a heat dissipation working medium filled inside the heat-dissipating microcavity;
• wherein the heat-dissipating microcavity comprises a heat absorption tank, a liquid collection tank arranged at an interval with the heat absorption tank, and a capillary micro channel group between the heat absorption tank and the liquid collection tank and communicating with the heat absorption tank and the liquid collection tank, the capillary micro channel group comprises a plurality of capillary micro channels arranged at intervals, the plurality of capillary micro channels comprises a plurality of first capillary micro channels and a plurality of second capillary micro channels, the first capillary micro channels constitute a first capillary micro channel group, the second capillary micro channels constitute a second capillary micro channel group, a liquid inlet end of each of the first capillary micro channels abuts and communicates with the heat absorption tank, a liquid outlet end of each of the first capillary micro channels abuts and communicates with the liquid collection tank, a liquid inlet end of each of the second capillary micro channels abuts and communicates with the liquid collection tank, and a liquid outlet end of each of the second capillary micro channels abuts and communicates with the heat absorption tank;
• and
• wherein each of the plurality of first capillary micro channels and each of the plurality of second capillary micro channels comprises a plurality of sub-flow-sections sequentially communicated with each other, each of the sub-flow-sections comprises:
• a main channel;
• at least two branch channels, an upstream end of each of the at least two branch channels independently abutting and communicating with a downstream end of the main channel away from the liquid inlet end of each of the first and second capillary microchannels, and extending in a direction away from the main channel;
• and
• a reservoir chamber abutting and communicating with a downstream end of each of the at least two branch channels away from the main channel;
• wherein an inner diameter of each of the at least two branch channels is less than an inner diameter of the main channel.

A heat-dissipating plate, wherein the heat-dissipating plate comprises:

• a heat-dissipating plate body;
• a heat-dissipating microcavity embedded in the heat-dissipating plate body;
• and
• a heat dissipation working medium filled in the heat-dissipating microcavity;
• wherein the heat-dissipating microcavity comprises a heat absorption tank, a liquid collection tank arranged at an interval with the heat absorption tank, and a capillary micro channel group between the heat absorption tank and the liquid collection tank and communicating with the heat absorption tank and the liquid collection tank, the capillary micro channel group comprises a plurality of capillary micro channels arranged at intervals, the plurality of capillary micro channels comprises a plurality of first capillary micro channels and a plurality of second capillary micro channels, the first capillary micro channels constitute a first capillary micro channel group, the second capillary micro channels constitute a second capillary micro channel group, a liquid inlet end of each of the first capillary micro channels abuts and communicates with the heat absorption tank, a liquid outlet end of each of the first capillary micro channels abuts and communicates with the liquid collection tank, a liquid inlet end of each of the second capillary micro channels abuts and communicates with the liquid collection tank, and a liquid outlet end of each of the second capillary micro channels abuts and communicates with the heat absorption tank;
• wherein each of the plurality of first capillary micro channels extends in a first direction, each of the plurality of second capillary micro channels extends in the first direction, the plurality of first capillary micro channels is sequentially arranged at intervals in a second direction, the plurality of second capillary micro channels is sequentially arranged at intervals in the second direction, and the first direction is at a predetermined angle to the second direction;
• and
• wherein the liquid collection tank comprises a first liquid collection tank and a second liquid collection tank spaced apart from the first liquid collection tank in the second direction, the first liquid collection tank abuts and communicates with the liquid outlet end of each of the first capillary micro channels, the second liquid collection tank abuts and communicates with the liquid inlet end of each of the second capillary micro channels, wherein the heat-dissipating microcavity further comprises a connecting tube, the connecting tube comprises a first connecting sub-tube and a second connecting sub-tube in communication with each other, an inner diameter of the first connecting sub-tube decreases gradually and an inner diameter of the second connecting sub-tube increases gradually along a direction from the first connecting sub-tube toward the second connecting sub-tube, the first liquid collection tank and the second liquid collection tank communicates with each other through the connecting tube, the first liquid collection tank abuts and communicates with the first connecting sub-tube, and the second liquid collection tank abuts and communicates with the second connecting sub-tube.