CN-121985544-A - Capacitor and display panel

Abstract

The application provides a capacitor and a display panel. The third electrode is connected with the first electrode or the second electrode at different temperatures, so that the capacitance value of the capacitor can be dynamically changed along with the temperature, and the problem that the same capacitance at different temperatures can cause the difference of pixel charging degrees is solved.

Inventors

• LI YAO
• LI JIEWEI

Assignees

• 惠科股份有限公司

Dates

Publication Date

20260505

Application Date

20260408

Claims (10)

1. 1. A capacitor is characterized by comprising a first electrode layer, a first dielectric layer, a second electrode layer, a second dielectric layer and a third electrode layer which are sequentially arranged along a first direction, wherein the first electrode layer and the second electrode layer form a first capacitance unit; wherein an on-off state between the first electrode layer and the second electrode layer is opposite to an on-off state between the first electrode layer and the third electrode layer; When the ambient temperature is lower than a threshold value, the second electrode layer and the third electrode layer are conducted, and the capacitance value of the first capacitance unit is used as the capacitance value of the capacitor; When the ambient temperature is not lower than the threshold value, the second electrode layer and the third electrode layer are disconnected, the second electrode layer and the third electrode layer form a second capacitance unit, and the sum of capacitance values of the first capacitance unit and the second capacitance unit is used as the capacitance value of the capacitor.
2. 2. The capacitor of claim 1, further comprising a control unit that controls an on-off state between the first electrode layer and the third electrode layer in response to a change in ambient temperature.
3. 3. The capacitor of claim 2, wherein the control unit is a semiconductor switch or the control unit is a temperature switch.
4. 4. The capacitor of claim 2, further comprising a conductive portion located on a side of the second dielectric layer in a second direction and between the second electrode layer and the third electrode layer for conducting between the second electrode layer and the third electrode layer when an ambient temperature is below a threshold; Wherein the first direction and the second direction are arranged in an intersecting manner.
5. 5. The capacitor of claim 4, wherein the conductive portion is a temperature-induced reversible deformation structure and a deformation direction is parallel to the first direction; the conductive portion is in an initial state when the ambient temperature is below the threshold value, and the conductive portion contracts to electrically isolate the second electrode layer from the third electrode layer when the ambient temperature is not below the threshold value.
6. 6. The capacitor of claim 5, wherein the conductive portion is at least one of a heat-shrinkable substrate, a liquid metal composite, a thermoplastic elastomer, or a conductive filler composite.
7. 7. The capacitor according to claim 4 or 5, wherein the conductive portion includes a first conductive portion provided on a side surface of the second electrode layer facing the third electrode layer; And/or the number of the groups of groups, The conductive part comprises a second conductive part which is arranged on one side surface of the third electrode layer facing the second electrode layer; And/or the number of the groups of groups, The conductive portion includes a third conductive portion disposed on a side surface of the second dielectric layer along the second direction.
8. 8. The capacitor of claim 4 or 5, wherein the second dielectric layer is a temperature-reversible deformation structure and the deformation direction is parallel to the first direction, wherein the second dielectric layer is in an initial state when the ambient temperature is below the threshold value, wherein the conductive portions are disposed in contact with the second electrode layer and the third electrode layer, respectively, and wherein the second dielectric layer stretches in the first direction to electrically isolate the second electrode layer from the third electrode layer when the ambient temperature is not below the threshold value.
9. 9. The capacitor of claim 4 or 5, wherein the second dielectric layer is a temperature-induced reversible deformation structure and a deformation direction is parallel to the second direction; when the ambient temperature is not lower than the threshold value, the second dielectric layer stretches along the second direction to drive the conductive part to displace, so that the conductive part is separated from at least one of the second electrode layer and the third electrode layer, and the second electrode layer and the third electrode layer are electrically isolated.
10. 10. A display panel comprising a transistor and the capacitor of any one of claims 1 to 9; the transistor is connected to the capacitor.

Description

Capacitor and display panel Technical Field The application relates to the technical field of display, in particular to a capacitor and a display panel. Background In the prior art, the mobility of a Thin Film Transistor (TFT) is improved along with the temperature rise, the charging efficiency is improved, but the charging time margin (margin) of a fixed capacitor in a high refresh rate scene is smaller, and the same capacitor at different temperatures can cause the difference of pixel charging degrees, so that the display brightness fluctuation is caused. Disclosure of Invention The application mainly solves the technical problems of providing a capacitor and a display panel and solving the problem that the same capacitor at different temperatures can cause the difference of pixel charging degrees in the prior art. In order to solve the technical problem, the first technical scheme provided by the application is that the capacitor comprises a first electrode layer, a first dielectric layer, a second electrode layer, a second dielectric layer and a third electrode layer which are sequentially arranged along a first direction, wherein the first electrode layer and the second electrode layer form a first capacitor unit; Wherein the on-off state between the first electrode layer and the second electrode layer is opposite to the on-off state between the first electrode layer and the third electrode layer; when the ambient temperature is lower than the threshold value, the second electrode layer and the third electrode layer are conducted, and the capacitance value of the first capacitance unit is used as the capacitance value of the capacitor; when the ambient temperature is not lower than the threshold value, the second electrode layer and the third electrode layer are disconnected, the second electrode layer and the third electrode layer form a second capacitance unit, and the sum of capacitance values of the first capacitance unit and the second capacitance unit is used as the capacitance value of the capacitor. In some embodiments, the capacitor further comprises a control unit that controls an on-off state between the first electrode layer and the third electrode layer in response to a change in ambient temperature. In some embodiments, the control unit is a semiconductor switch, or the control unit is a temperature switch. In some embodiments, the capacitor further comprises a conductive portion located at a side of the second dielectric layer along the second direction and between the second electrode layer and the third electrode layer for conducting between the second electrode layer and the third electrode layer when the ambient temperature is below the threshold value; the first direction and the second direction are intersected. In some embodiments, the conductive portion is a temperature-induced reversible deformation structure, and the deformation direction is parallel to the first direction; When the ambient temperature is below the threshold value, the conductive part is in an initial state, and when the ambient temperature is not below the threshold value, the conductive part contracts to electrically isolate the second electrode layer from the third electrode layer. In some embodiments, the conductive portion employs at least one of a heat-shrinkable substrate, a liquid metal composite, a thermoplastic elastomer, or a conductive filler composite. In some embodiments, the conductive portion includes a first conductive portion disposed on a side surface of the second electrode layer facing the third electrode layer; And/or the number of the groups of groups, The conductive part comprises a second conductive part which is arranged on one side surface of the third electrode layer facing the second electrode layer; And/or the number of the groups of groups, The conductive part comprises a third conductive part which is arranged on the side surface of the second dielectric layer along the second direction. In some embodiments, the second dielectric layer is a temperature-induced reversible deformation structure, the deformation direction is parallel to the first direction, the second dielectric layer is in an initial state when the ambient temperature is lower than a threshold value, the conductive parts are respectively in contact with the second electrode layer and the third electrode layer, and the second dielectric layer stretches along the first direction to electrically isolate the second electrode layer from the third electrode layer when the ambient temperature is not lower than the threshold value. In some embodiments, the second dielectric layer is a temperature-induced reversible deformation structure, and the deformation direction is parallel to the second direction; When the ambient temperature is not lower than the threshold value, the second dielectric layer stretches along the second direction to drive the conductive part to displace, so that the conductive part is separated from at