Electronic ink screen and display apparatus

A display apparatus, comprising:

• an electronic ink screen, comprising:
• a first conductive substrate comprising a drive layer and an electrode layer;
• a second conductive substrate located above the first conductive substrate;
• an ink display layer located between the first conductive substrate and the second conductive substrate, wherein the ink display layer has a plurality of ink accommodating cavities that are mutually independent, wherein each of the ink accommodating cavities is respectively provided with ink particles that have a same color such that each ink accommodating cavity includes only one color of ink particles, and wherein the ink particles are configured to display a first color;
• and
• a function layer located at a side of the ink display layer, wherein the side of the ink display layer faces away from the second conductive substrate, and wherein the function layer is configured to display a second color,
• wherein the electrode layer comprises at least one electrode group, and each ink accommodating cavity corresponds to one electrode group,
• wherein the electrode group comprises a first electrode and a second electrode disposed relative to each other in a thickness direction perpendicular to the electronic ink screen,
• wherein the drive layer is configured to provide a voltage to the electrode layer, to form an electric field in a vertical direction between the electrode layer and the second conductive substrate, and to form an electric field in a horizontal direction between the first electrode and the second electrode,
• wherein the electric field in the vertical direction is configured to control the ink particles to move in the vertical direction in the ink accommodating cavity, and the electric field in the horizontal direction is configured to control the ink particles to move in the horizontal direction in the ink accommodating cavity;
• wherein in a first drive state, the electric field in the horizontal direction is formed between the first electrode and the second electrode, the ink particles move to an inner side wall of the ink accommodating cavity, and the electronic ink screen displays the second color,
• wherein in a second drive state, the electric field in the vertical direction is formed between the electrode layer and the second conductive substrate, the ink particles move to an inner top wall or an inner bottom wall of the ink accommodating cavity, and the electronic ink screen displays the first color, and
• wherein in a third drive state, the electric field in the horizontal direction is formed between the first electrode and the second electrode, the electric field in the vertical direction is formed between the electrode layer and the second conductive substrate, the ink particles are dispersedly provided in the ink accommodating cavity, and the electronic ink screen displays in a gray state.