Terminal having color-changing layer

1. A terminal, comprising:

a display screen comprising a sensor area, the sensor area being a transparent display area on the display screen;

a sensor disposed below the display screen, the sensor having a photosensitive portion;

a color-changing layer above the display screen; and

a controller electrically connected to the color-changing layer,

wherein the photosensitive portion of the sensor is within a first orthographic projection range of the sensor area, and the sensor area is within a second orthographic projection range of the color-changing layer;

the transparent display area is transparent when the sensor is in operation;

the color-changing layer is configured to switch among a colorless state, at least one intermediate state, and a colored state, the colored state is a state in which light transmittance is less than a first threshold, the colorless state is a state in which the light transmittance is greater than a second threshold, and the intermediate state is a state in which the light transmittance is greater than the first threshold and less than the second threshold; and the controller is configured to:

control, in response to satisfying a second condition, the color-changing layer to switch from the intermediate state to the colored state,

control, in response to satisfying a third condition, the color-changing layer to switch from the colorless state to the colored state,

control, in response to satisfying a fourth condition, the color-changing layer to switch from the intermediate state to the colorless state,

control, in response to satisfying a fifth condition, the color-changing layer to switch from the colorless state to the intermediate state,

control, in response to satisfying a sixth condition, the color-changing layer to switch from the colored state to the intermediate state, and

control, in response to satisfying a seventh condition, the color-changing layer to switch from the colored state to the colorless state;

wherein the second condition comprises the color-changing layer being currently in the intermediate state and the terminal controlling the display screen to enter a screen-off state, the third condition comprises the sensor being in a non-operating state and the sensor area of the display screen being in a non-display state, the fourth condition comprises the color-changing layer being in the intermediate state and the sensor is activated, the fifth condition comprises the sensor switching from being activated to being deactivated and brightness of the display screen being lower than a brightness threshold, the sixth condition comprises the display screen switching from the screen-off state to a screen-on state and the brightness being lower than the brightness threshold, and the seventh condition includes the display screen switching from the screen-on state to the sensor being activated.

2. The terminal according to claim 1 , wherein the display screen further comprises a polarizer layer, an encapsulation layer, an organic light emitting diode (OLED) layer, a drive circuit layer, a glass substrate layer and a light shielding layer arranged in sequence;

an aligned opening area is on the polarizer layer, the glass substrate layer and the light shielding layer; and

the sensor area is on the encapsulation layer, the OLED layer, and the drive circuit layer corresponding to the opening area.

3. The terminal according to claim 1 , wherein the display screen further comprises a polarizer layer, a liquid crystal layer and a backlight layer arranged in sequence;

an aligned opening area is on the polarizer layer and the backlight layer; and

the sensor area comprises an area on the liquid crystal layer corresponding to the opening area.

4. The terminal according to claim 1 , wherein a front cover is above the display screen, and the color-changing layer is on an upper surface or a lower surface of the front cover, or inside the front cover.

5. The terminal according to claim 1 , wherein a front cover and a touch layer between the front cover and the display screen are above the display screen, and the color-changing layer is on an upper surface or a lower surface of the touch layer, or inside the touch layer.

6. The terminal according to claim 1 , wherein the color-changing layer is a thermochromic layer, an electrochromic layer or a thermoelectric mixed color-changing layer.

7. The terminal according to claim 6 , wherein a control signal of the electrochromic layer is a direct current signal or an alternating current signal.

8. The terminal according to claim 1 , wherein the color-changing layer is a magnetochromic layer; and

a coil structure corresponding to the magnetochromic layer is below the display screen, and the coil structure is configured to generate a magnetic field that controls the magnetochromic layer.

9. The terminal according to claim 1 , wherein the sensor comprises at least one of a camera, an ambient light sensor, a distance sensor or a light sensor fingerprint sensor.

10. A terminal, comprising: a display component, the display component comprising a display screen, a color-changing layer disposed above the display screen and a controller electrically connected to the color-changing layer, wherein

the color-changing layer is configured to switch among a colorless state, at least one intermediate state, and a colored state, the colored state is a state in which light transmittance is less than a first threshold, the colorless state is a state in which the light transmittance is greater than a second threshold, and the intermediate state is a state in which the light transmittance is greater than the first threshold and less than the second threshold; and the controller is configured to:

control, in response to satisfying a second condition, the color-changing layer to switch from the intermediate state to the colored state,

control, in response to satisfying a third condition, the color-changing layer to switch from the colorless state to the colored state,

control, in response to satisfying a fourth condition, the color-changing layer to switch from the intermediate state to the colorless state,

control, in response to satisfying a fifth condition, the color-changing layer to switch from the colorless state to the intermediate state,

control, in response to satisfying a sixth condition, the color-changing layer to switch from the colored state to the intermediate state, and

control, in response to satisfying a seventh condition, the color-changing layer to switch from the colored state to the colorless state;

wherein the second condition comprises the color-changing layer being currently in the intermediate state and the terminal controlling the display screen to enter a screen-off state, the third condition comprises the sensor being in a non-operating state and the sensor area of the display screen being in a non-display state, the fourth condition comprises the color-changing layer being in the intermediate state and the sensor is activated, the fifth condition comprises the sensor switching from being activated to being deactivated and brightness of the display screen being lower than a brightness threshold, the sixth condition comprises the display screen switching from the screen-off state to a screen-on state and the brightness being lower than the brightness threshold, and the seventh condition includes the display screen switching from the screen-on state to the sensor being activated.

11. The terminal according to claim 10 , wherein the color-changing layer covers an entire area of the display screen.

12. The terminal according to claim 10 , wherein the terminal further comprises a sensor below the display screen, the sensor having a photosensitive portion; the color-changing layer covers a sensor area of the display screen; the photosensitive portion of the sensor is within a first orthographic projection range of the sensor area; and the sensor area is within a second orthographic projection of the color-changing layer.