Display device and method for controlling a display device

1. A display device, comprising: a backlight source, a liquid crystal lens layer having a plurality of lens units arranged in a matrix, and a lens controller;

wherein the backlight source comprises light sources of three different colors, light sources of each color are lit up and turned off circularly, and only a light source of one color is lit up at a same moment; wherein the lens controller is configured to control a matching degree between a turn-on time of each lens unit and a light-up time of the light sources, so as to control quantity of light transmitted by the turned-on lens unit, and the lens controller is further configured to enable light exit directions of the plurality of lens units to be converged in an imaging area in front of the display device for imaging display;

and wherein the backlight source further comprises a light guide plate; the light guide plate comprises a light entrance face, a reflecting bottom face, a first reflecting side face and a second reflecting side face, a light exit face disposed opposite to the reflecting bottom face; light incident from the light entrance face is emitted towards the first reflecting side face and reflected to the second reflecting side face by the first reflecting side face, then is emitted towards the reflecting bottom face after being reflected by the second reflecting side face, and is emitted out from the light exit face after being reflected by the reflecting bottom face.

2. The display device according to claim 1 , further comprising an eye tracking system, wherein the eye tracking system detects a position of viewer eyes, and the liquid crystal lens controller is configured to enable the imaging area to be located at the detected position of the viewer eyes based on feedback information of the eye tracking system.

3. The display device according to claim 1 , wherein the first reflecting side face has a plurality of prism structures, the plurality of prism structures are configured to convert light from an external light source into light uniformly distributed on the second reflecting side face.

4. The display device according to claim 1 , wherein the reflecting bottom face is provided with a prism array so as to emit light from the second reflecting side face out from the light exit face of the light guide plate.

5. The display device according to claim 1 , wherein the light entrance face is disposed opposite to the light sources of three different colors.

6. The display device according to claim 1 , wherein the lens controller is configured to adjust an overlapping range between the turn-on time of each lens unit and the light-up time of the light source of a corresponding color, so as to control gray scale of a displayed color.

7. The display device according to claim 1 , wherein the liquid crystal lens layer comprises a first substrate, a first electrode array, a liquid crystal layer, a second electrode array and a second substrate, so as to constitute a plurality of lens units distributed in a matrix.

8. An electronic equipment comprising a display device; the display device comprises: a backlight source, a liquid crystal lens layer having a plurality of lens units arranged in a matrix, and a lens controller;

wherein the backlight source comprises light sources of three different colors, light sources of each color are lit up and turned off circularly, and only a light source of one color is lit up at a same moment; wherein the lens controller is configured to control a matching degree between a turn-on time of each lens unit and a light-up time of the light sources, so as to control quantity of light transmitted by the turned-on lens unit, and the lens controller is further configured to enable light exit directions of the plurality of lens units to be converged in an imaging area in front of the display device for imaging display

and wherein the backlight source further comprises a light guide plate; the light guide plate comprises a light entrance face, a reflecting bottom face, a first reflecting side face and a second reflecting side face, a light exit face disposed opposite to the reflecting bottom face; light incident from the light entrance face is emitted towards the first reflecting side face and reflected to the second reflecting side face by the first reflecting side face, then is emitted towards the reflecting bottom face after being reflected by the second reflecting side face, and is emitted out from the light exit face after being reflected by the reflecting bottom face.

9. The electronic equipment according to claim 8 , further comprising an eye tracking system, wherein the eye tracking system detects a position of viewer eyes, and the liquid crystal lens controller is configured to enable the imaging area to be located at the detected position of the viewer eyes based on feedback information of the eye tracking system.

10. The electronic equipment according to claim 8 , wherein the first reflecting side face has a plurality of prism structures, the plurality of prism structures are configured to convert light from an external light source into light uniformly distributed on the second reflecting side face.

11. The electronic equipment according to claim 8 , wherein the lens controller is configured to adjust an overlapping range between the turn-on time of each lens unit and the light-up time of the light source of a corresponding color, so as to control gray scale of a displayed color.

12. The electronic equipment according to claim 8 , wherein the liquid crystal lens layer comprises a first substrate, a first electrode array, a liquid crystal layer, a second electrode array and a second substrate, so as to constitute a plurality of lens units distributed in a matrix.