LED display screen

Abstract

The utility model provides a light-emitting diode (LED) display screen. The LED display screen comprises a frame, a light-emitting module and a light-emitting module, the at least two display units are arranged on the frame in an array mode, each display unit comprises a box body and an LED module, and the at least two LED modules are arranged on the front side of the box body in an array mode; the adjusting mechanism is arranged between the box body and the LED module, and the adjusting mechanism can drive the LED module to move relative to the box body; the bright and dark line detection piece is arranged in front of the LED module so as to detect bright and dark line information between two adjacent display units; the control part is in signal connection with the bright and dark line detection part and the adjusting mechanism, the control part receives the detection result of the bright and dark line detection part, and the control part can control the adjusting mechanism to drive the LED module to move. Through the technical scheme provided by the invention, the problems of long time, high difficulty, low precision and poor effect of manually adjusting the gap between the LED modules in the related technology can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of LED display screens, and in particular to an LED display screen. Background Art

[0002] With the popularization of LED display screens in various fields, from indoor all-in-one conference machines to outdoor exterior walls of high-rise buildings, as well as applications in airports, subways and other transportation hubs, LED display screens have been fully integrated into all aspects of people's lives and can bring people a wonderful visual experience.

[0003] In the related art, when the LED display screen is installed, workers manually adjust the gap between the LED modules.

[0004] However, manually adjusting the gap between LED modules is time-consuming, difficult, low-precision and ineffective. Utility Model Content

[0005] The utility model provides an LED display screen to solve the problems in the related art of manually adjusting the gap between LED modules, which is time-consuming, difficult, low-precision and poorly effective.

[0006] The utility model provides an LED display screen, which comprises: a frame; at least two display units, which are arrayed on the frame, the display units comprising a box and an LED module, and at least two LED module arrays are arrayed on the front side of the box; an adjustment mechanism, which is arranged between the box and the LED module, and the adjustment mechanism can drive the LED module to move relative to the box; a bright and dark line detection component, which is arranged in front of the LED module to detect bright and dark line information between two adjacent display units; a control component, which is respectively connected with the bright and dark line detection component and the adjustment mechanism by signal, the control component receives the detection result of the bright and dark line detection component, and the control component can control the adjustment mechanism to drive the LED module to move.

[0007] Furthermore, the adjustment mechanism includes an X-direction adjustment member and a Y-direction adjustment member, the X-direction adjustment member is arranged on the box body, the Y-direction adjustment member is arranged on the output end of the X-direction adjustment member, and the output end of the Y-direction adjustment member is connected to the LED module, wherein the X-direction and the Y-direction are perpendicular to each other and parallel to the box body, and the control member is respectively connected to the bright and dark line detection member, the X-direction adjustment member and the Y-direction adjustment member signal.

[0008] Furthermore, the X-direction adjustment component includes an X-direction drive motor, an X-direction gear, an X-direction rack and an X-direction mechanical arm. The X-direction drive motor is arranged on a box body, and an output shaft of the X-direction drive motor extends along the Y-direction. The X-direction gear is arranged on the output shaft of the X-direction drive motor. The X-direction mechanical arm is movably arranged on the box body along the X-direction. The X-direction mechanical arm is provided with an X-direction rack meshing with the X-direction gear. The Y-direction adjustment component is arranged on the X-direction mechanical arm, and the control component is connected to the X-direction drive motor signal.

[0009] Furthermore, the Y-axis adjustment component includes a Y-axis drive motor, a Y-axis gear, a Y-axis rack and a Y-axis robotic arm. The Y-axis drive motor is arranged on the output end of the X-axis adjustment component, the output shaft of the Y-axis drive motor extends along the Z-axis, the Y-axis gear is arranged on the output shaft of the Y-axis drive motor, the Y-axis robotic arm is movably arranged on the box along the Y-axis, the Y-axis robotic arm is provided with a Y-axis rack meshing with the Y-axis gear, the LED module is arranged on the Y-axis robotic arm, and the control component is respectively connected to the bright and dark line detection component and the Y-axis drive motor signal, wherein the Z-axis is perpendicular to the X-axis and the Y-axis, respectively.

[0010] Furthermore, the adjustment mechanism also includes a box connecting seat, the box connecting seat is arranged on the box, the X-axis drive motor is arranged on the box connecting seat, the X-axis robotic arm includes a connected driving section and a connecting section, the X-axis rack is arranged on the driving section, the driving section is movably arranged in the X-direction through the box connecting seat, and the connecting section is located on the outside of the box connecting seat.

[0011] Furthermore, the adjustment mechanism also includes a Z-direction adjustment member, which is arranged on the output end of the Y-direction adjustment member, and the output end of the Z-direction adjustment member is connected to the LED module, wherein the Z direction is perpendicular to the X direction and the Y direction respectively.

[0012] Furthermore, the Z-axis adjustment component includes a Z-axis drive motor, a Z-axis gear, a Z-axis rack and a Z-axis robotic arm. The Z-axis drive motor is arranged on the output end of the Y-axis adjustment component, the output shaft of the Z-axis drive motor extends along the Y-axis, the Z-axis gear is arranged on the output shaft of the Z-axis drive motor, the Z-axis robotic arm is movably arranged on the box along the Z-axis, the Z-axis robotic arm is provided with a Z-axis rack meshing with the Z-axis gear, the LED module is arranged on the Z-axis robotic arm, and the control component is connected to the Z-axis drive motor signal.

[0013] Furthermore, the frame includes a frame and a mounting plate arranged in the frame, the display unit is arranged on the front side of the mounting plate and connected to the mounting plate, a Z-direction distance measuring component is arranged on the frame, and the control component is signal-connected to the Z-direction distance measuring component and the Z-direction adjustment component.

[0014] Furthermore, the distance measuring component includes a laser bar arranged on the inner side of the frame, and the laser bars are two laser bars arranged on both sides of the frame. The box body includes a back plate and a surrounding plate. The adjustment mechanism is arranged on the back plate, and the LED module is arranged on the front side of the surrounding plate.

[0015] Furthermore, the bright and dark line detection element includes a camera.

[0016] By applying the technical solution of the utility model, the LED display screen includes a frame, an adjustment mechanism, a light and dark line detection component, a control component and at least two display units. When the box is completely installed on the frame and the LED module is installed on the box, the light and dark line detection component is used to detect the light and dark line information between two adjacent display units from the front of the LED module, and the control component automatically analyzes the light and dark line information between the two adjacent display units, thereby sending a signal to the adjustment mechanism to drive the LED module to move relative to the box (or the control component receives the detection result of the light and dark line detection component, and manually operates the adjustment mechanism to drive the LED module to move relative to the box) to adjust the distance between the two adjacent display units until the light and dark line detection component detects that the distance between the two adjacent display units is uniform, thereby quickly and accurately adjusting the gap between the LED modules, and can reduce the difficulty of operation and improve the adjustment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 An exploded view of an LED display screen provided according to an embodiment of the utility model is shown;

[0019] Figure 2 A schematic structural diagram of a box body and a Z-direction distance measuring component of an LED display screen provided according to an embodiment of the utility model is shown;

[0020] Figure 3 An exploded view of an LED display unit of an LED display screen provided according to an embodiment of the utility model is shown;

[0021] Figure 4 A schematic diagram of the structure of an LED display module of an LED display screen provided according to an embodiment of the utility model is shown;

[0022] Figure 5 An exploded view of an adjustment mechanism of an LED display screen provided according to an embodiment of the utility model is shown.

[0023] The above drawings include the following reference numerals:

[0024] 10. frame; 11. frame; 111. Z-direction distance measuring component; 1111. laser bar; 12. mounting plate;

[0025] 20. display unit; 21. cabinet; 211. back panel; 212. enclosure; 22. LED module;

[0026] 30. Adjustment mechanism; 31. X-axis adjustment member; 311. X-axis drive motor; 312. X-axis gear; 313. X-axis rack; 314. X-axis mechanical arm; 3141. Drive section; 3142. Connecting section; 32. Y-axis adjustment member; 321. Y-axis drive motor; 322. Y-axis gear; 323. Y-axis rack; 324. Y-axis mechanical arm; 33. Box connecting seat; 34. Z-axis adjustment member; 341. Z-axis drive motor; 342. Z-axis gear; 343. Z-axis rack; 344. Z-axis mechanical arm; 35. Module mounting seat. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] like Figures 1 to 5 As shown, an embodiment of the utility model provides an LED display screen, which includes a frame 10, an adjustment mechanism 30, a bright and dark line detection member, a control member and at least two display units 20. The at least two display units 20 are arranged in an array on the frame 10. The display unit 20 includes a box 21 and an LED module 22. At least two LED modules 22 are arranged in an array on the front side of the box 21. The adjustment mechanism 30 is arranged between the box 21 and the LED module 22. The adjustment mechanism 30 can drive the LED module 22 to move relative to the box 21. The bright and dark line detection member is arranged in front of the LED module 22 to detect the bright and dark line information between two adjacent display units 20. The control member is respectively connected to the bright and dark line detection member and the adjustment mechanism 30 by signal. The control member receives the detection result of the bright and dark line detection member, and the control member can control the adjustment mechanism 30 to drive the LED module 22 to move.

[0029] The LED display screen provided by the present embodiment includes a frame 10, an adjustment mechanism 30, a light and dark line detection component, a control component and at least two display units 20. When the box 21 is completely installed on the frame 10 and the LED module 22 is installed on the box 21, the light and dark line detection component is used to detect the light and dark line information between two adjacent display units 20 from the front of the LED module 22, and the control component automatically analyzes the light and dark line information between two adjacent display units 20, thereby sending a signal to the adjustment mechanism 30 to drive the LED module 22 to move relative to the box 21 (or the control component receives the detection result of the light and dark line detection component, and manually operates the adjustment mechanism 30 to drive the LED module 22 to move relative to the box 21), so as to adjust the distance between the two adjacent display units 20 until the light and dark line detection component detects that the distance between the two adjacent display units 20 is uniform, thereby quickly and accurately adjusting the gap between the LED modules 22, and can reduce the difficulty of operation and improve the adjustment effect.

[0030] like Figure 5 As shown, the adjustment mechanism 30 includes an X-direction adjustment member 31 and a Y-direction adjustment member 32, wherein the X-direction adjustment member 31 is arranged on the housing 21, and the Y-direction adjustment member 32 is arranged on the output end of the X-direction adjustment member 31, and the output end of the Y-direction adjustment member 32 is connected to the LED module 22, wherein the X-direction and the Y-direction are perpendicular to each other and parallel to the housing 21, and the control member is respectively connected to the light and dark line detection member, the X-direction adjustment member 31 and the Y-direction adjustment member 32 by signal. By adopting the above-mentioned X-direction adjustment member 31 and the Y-direction adjustment member 32, when adjusting the spacing between two adjacent display units 20, the movement of the LED module 22 relative to the housing 21 can be decomposed into two directions of movement (X-direction movement and Y-direction movement) that are perpendicular to each other and parallel to the housing 21, and the movement accuracy of the LED module 22 relative to the housing 21 when adjusting the spacing between two adjacent display units 20 can be improved.

[0031] like Figure 5As shown, the X-axis adjustment member 31 includes an X-axis driving motor 311, an X-axis gear 312, an X-axis rack 313 and an X-axis mechanical arm 314. The X-axis driving motor 311 is arranged on the box body 21, and the output shaft of the X-axis driving motor 311 extends along the Y direction. The X-axis gear 312 is arranged on the output shaft of the X-axis driving motor 311. The X-axis mechanical arm 314 is movably arranged on the box body 21 along the X direction. The X-axis mechanical arm 314 is provided with an X-axis rack 313 meshing with the X-axis gear 312. The Y-axis adjustment member 32 is arranged on the X-axis mechanical arm 314, and the control member is connected to the X-axis driving motor 311 by signal. The X-direction drive motor 311 is used to drive the X-direction gear 312 to rotate around the output shaft of the X-direction drive motor 311. The meshing action of the X-direction gear 312 and the X-direction rack 313 can drive the X-direction rack 313 to drive the X-direction robot 314 to move along the X-direction, thereby causing the LED module 22 to move relative to the box 21 along the X-direction.

[0032] like Figure 5 As shown, the Y-axis adjustment member 32 includes a Y-axis driving motor 321, a Y-axis gear 322, a Y-axis rack 323 and a Y-axis mechanical arm 324. The Y-axis driving motor 321 is arranged on the output end of the X-axis adjustment member 31, and the output shaft of the Y-axis driving motor 321 extends along the Z-axis. The Y-axis gear 322 is arranged on the output shaft of the Y-axis driving motor 321. The Y-axis mechanical arm 324 is movably arranged on the box body 21 along the Y-axis. The Y-axis rack 323 meshing with the Y-axis gear 322 is arranged on the Y-axis mechanical arm 324. The LED module 22 is arranged on the Y-axis mechanical arm 324. The control member is respectively connected to the bright and dark line detection member and the Y-axis driving motor 321 by signal, wherein the Z-axis is perpendicular to the X-axis and the Y-axis, respectively. The Y-axis driving motor 321 is used to drive the Y-axis gear 322 to rotate around the output shaft of the Y-axis driving motor 321. The meshing action of the Y-axis gear 322 and the Y-axis rack 323 can drive the Y-axis rack 323 to drive the Y-axis robot 324 to move along the Y-axis, thereby causing the LED module 22 to move relative to the box 21 along the Y-axis.

[0033] like Figure 5 As shown, the adjustment mechanism 30 also includes a box connection seat 33, the box connection seat 33 is arranged on the box 21, the X-direction driving motor 311 is arranged on the box connection seat 33, the X-direction mechanical arm 314 includes a driving section 3141 and a connecting section 3142 connected to each other, the X-direction rack 313 is arranged on the driving section 3141, the driving section 3141 is movably arranged in the box connection seat 33 along the X direction, and the connecting section 3142 is located on the outside of the box connection seat 33. The use of the box connection seat 33 can improve the installation stability of the adjustment mechanism 30 and the box 21.

[0034] like Figure 5As shown, the adjustment mechanism 30 further includes a Z-direction adjustment member 34, which is disposed on the output end of the Y-direction adjustment member 32, and the output end of the Z-direction adjustment member 34 is connected to the LED module 22, wherein the Z-direction is perpendicular to the X-direction and the Y-direction. The Z-direction adjustment member 34 can drive the LED module 22 to move relative to the box 21 along the Z-direction to adjust the height difference between the LED modules 22 and improve the flatness of the LED display screen.

[0035] like Figure 5 As shown, the Z-axis adjustment member 34 includes a Z-axis drive motor 341, a Z-axis gear 342, a Z-axis rack 343 and a Z-axis mechanical arm 344. The Z-axis drive motor 341 is arranged on the output end of the Y-axis adjustment member 32, and the output shaft of the Z-axis drive motor 341 extends along the Y-direction. The Z-axis gear 342 is arranged on the output shaft of the Z-axis drive motor 341. The Z-axis mechanical arm 344 is movably arranged on the box body 21 along the Z-direction. The Z-axis rack 343 meshing with the Z-axis gear 342 is arranged on the Z-axis mechanical arm 344. The LED module 22 is arranged on the Z-axis mechanical arm 344, and the control member is connected to the Z-axis drive motor 341 by signal. The Y-direction drive motor 321 is used to drive the Y-direction gear 322 to rotate around the output shaft of the Y-direction drive motor 321. The meshing action of the Y-direction gear 322 and the Y-direction rack 323 can be used to drive the Y-direction rack 323 to drive the Y-direction mechanical arm 324 to move along the Y direction, thereby causing the LED module 22 to move relative to the box body 21 along the Y direction. The Z-direction drive motor 341 is used to drive the Z-direction gear 342 to rotate around the output shaft of the Z-direction drive motor 341. The meshing action of the Z-direction gear 342 and the Z-direction rack 343 can be used to drive the Z-direction rack 343 to drive the Z-direction mechanical arm 344 to move along the Z direction, thereby causing the LED module 22 to move relative to the box body 21 along the Z direction, thereby adjusting the height difference between the LED modules 22 and improving the flatness of the LED display screen.

[0036] like Figure 5 As shown, the adjustment mechanism 30 further includes a module mounting seat 35 , which is disposed on the Z-axis mechanical arm 344 . The LED module 22 is disposed on the module mounting seat 35 , which can improve the installation stability of the adjustment mechanism 30 and the LED module 22 .

[0037] like Figure 2As shown, the frame 10 includes a frame 11 and a mounting plate 12 disposed in the frame 11, the display unit 20 is disposed at the front side of the mounting plate 12 and connected to the mounting plate 12, a Z-direction distance measuring member 111 is disposed on the frame 11, and the control member is connected to the Z-direction distance measuring member 111 and the Z-direction adjustment member 34 by signal. The Z-direction distance measuring member 111 is used to detect the height position of the LED module 22 in the Z direction, and the control member automatically analyzes the height difference between at least two display units 20 in the Z direction, thereby sending a signal to the Z-direction adjustment member 34 to drive the LED module 22 to move relative to the box 21 along the Z direction (or according to the detection result of the Z-direction distance measuring member 111 received by the control member, the adjustment mechanism 30 is manually operated to drive the LED module 22 to move relative to the box 21), so as to adjust the height difference between at least two display units 20 in the Z direction, until the Z-direction distance measuring member 111 detects that the height positions of at least two display units 20 in the Z direction are equal, thereby quickly and accurately adjusting the height difference between the LED modules 22 in the Z direction, and can reduce the difficulty of operation and improve the adjustment effect.

[0038] like Figure 2 As shown, the distance measuring component includes a laser bar 1111 arranged inside the frame 11, and the laser bars 1111 are two laser bars 1111 arranged on both sides of the frame 11. The box body 21 includes a back plate 211 and a surrounding plate 212. The adjustment mechanism 30 is arranged on the back plate 211, and the LED module 22 is arranged on the front side of the surrounding plate 212. The laser bar is turned on, and the distance between the LED module 22 and the laser beam emitted by the laser bar is measured. After obtaining the distance between each LED module 22 and the laser beam emitted by the laser bar, the control component feeds back to the Z-direction drive motor 341 for adjustment, so that each LED module 22 of the LED display screen is in the same plane.

[0039] In this embodiment, the bright and dark line detection element includes a camera. The camera can be used to take pictures from the front side of the LED module to obtain an image, and the control element is used to analyze the distance between two adjacent LED modules 22 in the image, so as to obtain the bright and dark line information between two adjacent display units 20.

[0040] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An LED display screen, characterized in that: The LED display screen comprises: Frame (10); At least two display units (20) are arranged in an array on the frame (10), the display unit (20) comprises a box (21) and an LED module (22), and at least two of the LED modules (22) are arranged in an array on the front side of the box (21); an adjusting mechanism (30) disposed between the box (21) and the LED module (22), the adjusting mechanism (30) being capable of driving the LED module (22) to move relative to the box (21); A light and dark line detection component is arranged in front of the LED module (22) to detect light and dark line information between two adjacent display units (20); A control component is respectively connected to the light and dark line detection component and the adjustment mechanism (30) by signals, the control component receives the detection result of the light and dark line detection component, and the control component can control the adjustment mechanism (30) to drive the LED module (22) to move.

2. The LED display screen according to claim 1, characterized in that: The adjustment mechanism (30) comprises an X-direction adjustment member (31) and a Y-direction adjustment member (32); the X-direction adjustment member (31) is arranged on the box (21); the Y-direction adjustment member (32) is arranged on the output end of the X-direction adjustment member (31); the output end of the Y-direction adjustment member (32) is connected to the LED module (22); the X-direction and the Y-direction are perpendicular to each other and are parallel to the box (21); and the control member is respectively signal-connected to the bright and dark line detection member, the X-direction adjustment member (31) and the Y-direction adjustment member (32).

3. The LED display screen according to claim 2, characterized in that: The X-direction adjustment member (31) comprises an X-direction drive motor (311), an X-direction gear (312), an X-direction rack (313) and an X-direction mechanical arm (314); the X-direction drive motor (311) is arranged on the box body (21); the output shaft of the X-direction drive motor (311) extends along the Y-direction; the X-direction gear (312) is arranged on the output shaft of the X-direction drive motor (311); the X-direction mechanical arm (314) is movably arranged on the box body (21) along the X-direction; the X-direction mechanical arm (314) is provided with an X-direction rack (313) meshing with the X-direction gear (312); the Y-direction adjustment member (32) is arranged on the X-direction mechanical arm (314); and the control member is connected to the X-direction drive motor (311) by signal.

4. The LED display screen according to claim 2, characterized in that: The Y-direction adjustment member (32) comprises a Y-direction drive motor (321), a Y-direction gear (322), a Y-direction rack (323) and a Y-direction mechanical arm (324); the Y-direction drive motor (321) is arranged on the output end of the X-direction adjustment member (31); the output shaft of the Y-direction drive motor (321) extends along the Z-direction; the Y-direction gear (322) is arranged on the output shaft of the Y-direction drive motor (321); the Y-direction mechanical arm (324) is movably arranged on the box body (21) along the Y-direction; the Y-direction mechanical arm (324) is provided with a Y-direction rack (323) meshing with the Y-direction gear (322); the LED module (22) is arranged on the Y-direction mechanical arm (324); the control member is respectively connected to the bright and dark line detection member and the Y-direction drive motor (321) by signals; wherein the Z-direction is respectively perpendicular to the X-direction and the Y-direction.

5. The LED display screen according to claim 3, characterized in that: The adjustment mechanism (30) further comprises a box connecting seat (33), wherein the box connecting seat (33) is arranged on the box (21), the X-direction driving motor (311) is arranged on the box connecting seat (33), the X-direction mechanical arm (314) comprises a driving section (3141) and a connecting section (3142) connected to each other, the X-direction rack (313) is arranged on the driving section (3141), the driving section (3141) is movably arranged on the box connecting seat (33) along the X-direction, and the connecting section (3142) is located on the outside of the box connecting seat (33).

6. The LED display screen according to claim 2, characterized in that: The adjustment mechanism (30) further comprises a Z-direction adjustment member (34), wherein the Z-direction adjustment member (34) is arranged on the output end of the Y-direction adjustment member (32), and the output end of the Z-direction adjustment member (34) is connected to the LED module (22), wherein the Z-direction is perpendicular to the X-direction and the Y-direction respectively.

7. The LED display screen according to claim 6, characterized in that: The Z-direction adjusting member (34) comprises a Z-direction driving motor (341), a Z-direction gear (342), a Z-direction rack (343) and a Z-direction mechanical arm (344); the Z-direction driving motor (341) is arranged on the output end of the Y-direction adjusting member (32); the output shaft of the Z-direction driving motor (341) extends along the Y-direction; the Z-direction gear (342) is arranged on the output shaft of the Z-direction driving motor (341); the Z-direction mechanical arm (344) is movably arranged on the box body (21) along the Z-direction; the Z-direction mechanical arm (344) is provided with a Z-direction rack (343) meshing with the Z-direction gear (342); the LED module (22) is arranged on the Z-direction mechanical arm (344); and the control member is connected to the Z-direction driving motor (341) by signal.

8. The LED display screen according to claim 6, characterized in that: The frame (10) comprises a frame (11) and a mounting plate (12) arranged in the frame (11); the display unit (20) is arranged on the front side of the mounting plate (12) and connected to the mounting plate (12); a Z-direction distance measuring component (111) is arranged on the frame (11); and the control component is signal-connected to the Z-direction distance measuring component (111) and the Z-direction adjustment component (34).

9. The LED display screen according to claim 8, characterized in that: The distance measuring component comprises a laser bar (1111) arranged inside the frame (11), and the laser bars (1111) are two laser bars (1111) arranged opposite to each other on two sides of the frame (11); the box body (21) comprises a back plate (211) and a surrounding plate (212); the adjustment mechanism (30) is arranged on the back plate (211); and the LED module (22) is arranged on the front side of the surrounding plate (212).

10. The LED display screen according to claim 1, characterized in that: The bright and dark line detection component includes a camera.

Images