Display module, display system and control method for display system

1. A display module, comprising:

a backlight module, wherein the backlight module comprises an optical film;

two display panels on a light exiting side of the optical film, wherein the two display panels are adjacent to each other and are spliced, orthographic projections of the two display panels onto a plane where the optical film is located are within the optical film, and the orthographic projections of the two display panels onto the plane where the optical film is located do not overlap; and

a transparent cover plate on light exiting sides of the display panels, wherein an ink layer is on a side of the transparent cover plate facing the backlight module, and the ink layer covers a region between the two adjacent display panels;

wherein a distance between the two display panels ranges from 1 millimeter to 2 millimeters, and a distance between display regions of the two display panels ranges from 4 millimeters to 6 millimeters.

2. The display module according to claim 1 , wherein the backlight module comprises two independent groups of light emitting units, the two groups of light emitting units are arranged to correspond to the same optical film, and the two groups of light emitting units correspond to the two display panels respectively.

3. The display module according to claim 1 , further comprising a filling structure between the backlight module and the transparent cover plate, wherein the filling structure fills a gap between the two display panels.

4. The display module according to claim 3 , wherein the filling structure has a size ranging from 1 millimeter to 2 millimeters in a width direction of the gap.

5. The display module according to claim 3 , wherein the ink layer is between the filling structure and the transparent cover plate, and a part of a first orthographic projection of the ink layer onto the transparent cover plate is between second orthographic projections of display regions of the two display panels onto the transparent cover plate, and the first orthographic projection and the second orthographic projections do not overlap.

6. The display module according to claim 5 , wherein a size of a part of the ink layer that is between the display regions of the two display panels ranges from 4 millimeters to 6 millimeters in the width direction of the gap.

7. The display module according to claim 1 , further comprising a polarizer on the light exiting side of the display panel, wherein a third orthographic projection of the polarizer onto the display panel exceeds the display region.

8. The display module of claim 7 , wherein a distance between a boundary of the third orthographic projection and a boundary of the display region ranges from 0.5 millimeters to 1.5 millimeters.

9. A display system, comprising the display module according to claim 1 ;

wherein the display panel has the display region and a non-display region surrounding the display region;

wherein the display panel comprises a substrate, a plurality of pixel units on the substrate and in the display region, and each of the plurality of pixel units comprises a pixel circuit;

wherein the display module further comprises a light detection circuit on the substrate and in the non-display region;

wherein the light detection circuit is configured to detect ambient brightness.

10. The display system according to claim 9 , wherein a minimum width between a region where the light detection circuit is located and the display region ranges from 0.7 millimeters to 1.0 millimeters.

11. The display system according to claim 9 , wherein the light detection circuit comprises a plurality of light detection sub-circuits, the light detection sub-circuit comprises a photosensitive thin film transistor, and a fourth orthographic projection of the photosensitive thin film transistor onto the transparent cover plate and the first orthographic projection of the ink layer onto the transparent cover plate do not overlap.

12. The display system according to claim 11 , wherein a minimum distance between an edge of the fourth orthographic projection and an edge of the first orthographic projection ranges from 0.1 millimeters to 0.3 millimeters.

13. The display system according to claim 11 , wherein the light detection sub-circuit comprises: a voltage dividing resistor, a diode, and a storage capacitor;

wherein a control electrode of the photosensitive thin film transistor is connected to a first terminal of the voltage dividing resistor and a first electrode of the diode, a first electrode of the photosensitive thin film transistor is connected to a data line, and a second electrode of the photosensitive thin film transistor is connected to a current output terminal;

wherein a second terminal of the voltage dividing resistor is connected to a first terminal of the storage capacitor;

wherein a second electrode of the diode is connected to the first terminal of the storage capacitor;

wherein a second terminal of the storage capacitor is connected to a scan line.

14. The display system according to claim 13 , wherein the light detection sub-circuit further comprises a reference thin film transistor, and an orthographic projection of the reference thin film transistor onto the transparent cover plate is within the first orthographic projection.

15. The display system according to claim 14 , wherein the quantity of the reference thin film transistor is more than one, and the more than one reference thin film transistors are connected in parallel.

16. The display system according to claim 14 , wherein the quantity of the photosensitive thin film transistor is more than one, and the more than one photosensitive thin film transistors are connected in parallel.

17. A control method for a display system, applied to the display system according to claim 9 , comprising:

receiving an ambient brightness signal generated by the light detection circuit according to ambient brightness;

determining the ambient brightness of the display module according to the ambient brightness signal; and

controlling display brightness of the display system according to the ambient brightness and a change rate of the ambient brightness.

18. The control method according to claim 17 , wherein each of the display panels comprises one or more display sub-regions, and before the receiving the ambient brightness signal generated by the light detection circuit according to the ambient brightness, the control method further comprises:

obtaining images to be displayed that correspond to the two display panels;

merging the images to be displayed into a first image;

segmenting the first image into a plurality of second images, wherein each of the plurality of second images corresponds to one of the display sub-regions; and

controlling each of the display sub-regions to display the corresponding second image.