A line-by-line reflective display device

Abstract

The present invention discloses a line-by-line reflective display device, comprising a fixed light source capable of emitting a light beam; a rotatably arranged and reciprocatingly raised and lowered reflector for reflecting the light beam emitted by the light source; and a screen; wherein the side of the reflector is provided with a mirror surface formed as a rotating curved surface, and during the rotation and reciprocating raising and lowering process of the reflector, the mirror surface can reflect the light beam emitted by the light source onto the screen and form a graphic area. In the above manner, the control software can decompose the display pattern and determine the modulation moment of each pixel display, so as to display the desired image on the screen.

Description

Technical Field

[0001] The present invention relates to the technical field of display equipment, and in particular to a line-by-line reflective display device. Background Art

[0002] As an emerging display technology, reflective display devices have attracted much attention. They can achieve display by reflecting external light, without the need to set a backlight source on the back, thereby greatly reducing the power consumption of the display. Due to the advantages of light weight and low power consumption, reflective display devices have been widely used in smart wearables, outdoor billboards, handheld terminals and other fields in recent years. At present, reflective display devices all use deflection mirrors to reflect the light beam of the light source, and then display the picture on the screen, but multiple deflection mirrors need to be set in the device to reflect the light beam, and correspondingly, multiple power sources need to be set to change the position of the deflection mirrors. In this way, the structure of the reflective display device is relatively complex, which makes it difficult to achieve the optimal relative control accuracy and display effect; in addition, the production cost and maintenance cost of the above-mentioned display device are high, which is not conducive to the promotion of reflective display technology. Summary of the invention

[0003] In view of the deficiencies existing in the above-mentioned technologies, the present invention provides a row-by-row reflective display device.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A line-by-line reflective display device comprises: a fixed light source capable of emitting a light beam; a rotatably arranged reflector that can be lifted and lowered back and forth, used for reflecting the light beam emitted by the light source; and a screen, used for receiving and displaying the light beam reflected by the reflector; wherein a mirror surface formed as a rotating curved surface is arranged on the side of the reflector, used for reflecting the light beam onto the screen and forming a pattern.

[0006] Preferably, the time period for the reciprocating lifting and lowering of the reflector is several times the time period for one rotation of the reflector; wherein, the longitudinal layered cross-section of the mirror surface is basically in the shape of an involute, so as to reflect the light beam into a line on the screen; the intersection line of the straight section of the reflector and the mirror surface is a curved segment having an angle with the axis of rotation of the reflector, so that the mirror surface can reflect the light beam into several lines on the screen during the lifting and lowering process.

[0007] Preferably, the angle between the curve segment and the axis of rotation of the reflector changes evenly and in equal proportion, so that the graphics displayed on the screen have a linear and even transition.

[0008] Preferably, the light source is an RGB light source so as to be able to adjust the color of the pattern displayed on the screen.

[0009] Preferably, the row reflective display device also includes a power module for driving the reflector to rotate and reciprocate and lift; the power module includes a motor; a gearbox connected to the motor, on which a first output wheel and a second output wheel with different rotation speeds are arranged; a rotating shaft that can be lifted and inserted into the first output wheel and rotate synchronously with the first output wheel; a first lifting connecting rod that can be lifted and lowered synchronously with the rotating shaft and rotated asynchronously; and a second lifting connecting rod, one end of which is hinged on the first lifting connecting rod and the other end is hinged at an eccentric position of the second output wheel; wherein the reflector is fixed on the rotating shaft; the rotation speed of the first output wheel is several times the rotation speed of the second output wheel.

[0010] Preferably, a long groove is vertically provided on the rotating shaft; and a toggle block is disposed on the first output wheel and is embedded in the long groove and can be lifted and lowered and floated in the long groove, so that the rotating shaft can keep rotating during the lifting process.

[0011] Preferably, a ring sleeve is arranged on the first lifting link; and the rotating shaft is arranged with a ring groove which can be embedded in the ring sleeve, so that the rotating shaft can rotate relative to the first lifting link, and the two can be lifted and lowered synchronously in the vertical direction.

[0012] Preferably, a reflective positioning block is arranged on the rotating shaft, and a light sensor is fixed on the side of the rotating shaft; wherein, when the rotation angle and the lifting height of the reflective positioning block are directly facing the light sensor, the light sensor can receive the reflected signal emitted by itself, thereby being able to monitor the position of the reflective positioning block to locate the initial rotation position of the reflector, which is used to calibrate the relative coordinates of the display screen image.

[0013] Preferably, the row-by-row reflective display device further comprises control software; the control software is capable of regulating the light intensity of the light source and of monitoring the initial rotation position of the reflector through a light sensor.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the line-by-line reflective display device provided by the present invention is provided with a mirror surface formed as a rotating curved surface on the periphery of the reflector; during the process of the reflector rotating and reciprocatingly lifting, the mirror surface can reflect the light beam emitted by the light source onto the screen and form a graphic area. In the above manner, the control software can decompose the display pattern and determine the modulation moment of each pixel display, so as to display the desired image on the screen. The present application has a simple structure, high control accuracy, and can optimize the effect of the pattern reflected and displayed on the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an isometric diagram of a structure of a branched reflective display device;

[0016] Figure 2 is an isometric schematic diagram of the reflector structure of the present invention;

[0017] Figure 3 is a top view schematic diagram of the reflector structure of the present invention;

[0018] Figure 4 is a bottom view schematic diagram of the reflector structure of the present invention;

[0019] Figure 5 It is the imaging path and imaging effect diagram of the graphics displayed on the screen. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0021] like Figure 1 — Figure 5 As shown, the present invention provides a line-by-line reflective display device, comprising:

[0022] A fixed light source 1 capable of emitting a light beam;

[0023] a rotatable and reciprocatingly raised reflector 2 for reflecting the light beam emitted by the light source 1; and

[0024] A screen 4, used for receiving and displaying the light beam reflected by the reflector 2;

[0025] Among them, the side of the reflector 2 is configured with a mirror surface 20 formed as a rotating curved surface for reflecting the light beam; the longitudinal layered cross-section of the mirror surface 20 is basically in the shape of an involute line, so as to reflect the light beam in a line shape on the screen 4; the time period of the reciprocating rise and fall of the reflector 2 is several times the time period of one rotation of the reflector 2.

[0026] As an embodiment of the present invention, the intersection line of the straight section of the reflector 2 and the mirror surface 20 is a curved segment having an angle with the rotation axis of the reflector 2, so that the mirror surface 20 can reflect the light beam into several lines on the screen 4 during the lifting process.

[0027] As an embodiment of the present invention, the angle between the curve segment and the rotation axis of the reflector 2 changes evenly and in equal proportion, so that the graphic 11 displayed on the screen 4 has a linear and even transition.

[0028] In the above manner, during the rotation of the reflector 2, the reflection angle of the mirror 20 to the light beam will change; thus, when the reflector 2 rotates one circle, the light beam can be reflected on the screen 4 to form a line of graphics; since the reflector 2 is lifted and lowered at the same time when it rotates, the vertical irradiation position of the light beam on the mirror 20 changes, thereby forming a line-breaking display effect.

[0029] Therefore, when the reflector 2 rises or falls once, the mirror surface can reflect a graphic area with several rows on the screen 4. The number of graphic rows displayed on the screen 4 is related to the multiple of the time period of the reciprocating rise and fall of the reflector 2 to the time period of one rotation of the reflector 2, that is, the number of graphic rows displayed on the screen 4 is equal to the multiple counted according to the increment method or the increment method. For example, if the time period of the reciprocating rise and fall of the reflector 2 is 6.8 times the time period of one rotation of the reflector 2, the number of graphic rows displayed on the screen 4 may be 7 rows or 8 rows; for another example, if the time period of the reciprocating rise and fall of the reflector 2 is 7 times the time period of one rotation of the reflector 2, the number of graphic rows displayed on the screen 4 may be 7 rows or 8 rows; but preferably, the time period of the reciprocating rise and fall of the reflector 2 is an integer multiple of the time period of one rotation of the reflector 2, and the number of graphic rows displayed on the screen 4 is equal to the number of the integer multiples.

[0030] As an embodiment of the present invention, the light source 1 is an RGB light source so as to be able to adjust the color of the pattern displayed on the screen 4 .

[0031] As an embodiment of the present invention, the screen 4 may be a flat screen, a curved screen, or other shapes such as a special shape.

[0032] As an embodiment of the present invention, the line-by-line reflective display device further comprises a power module for driving the reflector 2 to rotate and reciprocate; the power module comprises

[0033] Motor 3;

[0034] A gearbox 31 connected to the motor 3, on which a first output wheel 33 and a second output wheel 311 with different rotation speeds are arranged;

[0035] A rotating shaft 30 which is inserted into the first output wheel 33 in a liftable manner and rotates synchronously therewith;

[0036] A first lifting link 301 capable of synchronously lifting and lowering with the rotating shaft 30 and asynchronously rotating; and

[0037] A second lifting link 32, one end of which is hinged to the first lifting link 301, and the other end of which is hinged to an eccentric position of the second output wheel 311;

[0038] The reflector 2 is fixed on the rotating shaft 30 ; the rotation speed of the first output wheel 33 is several times the rotation speed of the second output wheel 311 .

[0039] As an embodiment of the present invention, a long groove 300 is vertically opened on the rotating shaft 30; the first output wheel 33 is provided with a toggle block 331 embedded in the long groove 300 and capable of rising and falling and floating in the long groove 300, so that the rotating shaft 30 can keep rotating during the lifting process.

[0040] As an embodiment of the present invention, a ring sleeve (not shown in the figure) is arranged on the first lifting link 301, and the rotating shaft 30 is arranged with a ring groove which can be embedded in the ring sleeve; through the above method, the rotating shaft 30 can rotate relative to the first lifting link 301, and the two can be lifted and lowered synchronously in the vertical direction.

[0041] As an embodiment of the present invention, a reflective positioning block 51 is disposed on the rotating shaft 30, and a light sensor 5 is fixed to the side of the rotating shaft 30;

[0042] Among them, when the rotation angle and lifting height of the reflective positioning block 51 are facing the optical sensor 5, the optical sensor 5 can receive the reflection signal emitted by itself, so that the position of the reflective positioning block 51 can be monitored to locate the initial rotation position of the reflector 2, which is used to calibrate the relative coordinates of the display screen image.

[0043] Specifically, when the optical sensor 5 detects the reflective positioning block 51, the reflector 2 just rises to the highest point or falls to the lowest point, and the initial position or the final position of a row of graphics 11 is just formed on the screen 4, so as to calculate the time period of the reciprocating rise and fall of the reflector 2 and to facilitate the calibration of the relative coordinates of the display screen image.

[0044] As an embodiment of the present invention, the line-by-line reflective display device further includes control software capable of adjusting the light intensity of the light source 1 ; the control software can also monitor the initial rotation position of the reflector 2 through the light sensor 5 .

[0045] In a specific application scenario, the rotation speed of the first output wheel 33 can be 4 times, 6 times, 8 times or other multiples of the rotation speed of the second output wheel 311; correspondingly, the time period for the reciprocating rise and fall of the reflector 2 is 4 times, 6 times, 8 times or other multiples of the time period for one rotation of the reflector 2; and the number of graphic rows displayed on the screen 4 is 4 rows, 6 rows, 8 rows or other numbers of rows.

[0046] Reference Figure 2-Figure 5, taking the case where the rotation speed of the first output wheel 33 is 4 times that of the second output wheel 311 as an example: the reflector 2 has a top surface 21 and a bottom surface 22, the angle between the curved segment and the rotation axis of the reflector 2 decreases uniformly in proportion along the direction from the bottom surface 22 to the top surface 21, and the asymptotic profile of the layered cross section at the bottom surface 22 is smaller than the asymptotic profile of the layered cross section at the top surface 21, so that a straight line figure can be displayed on the screen 4 along the horizontal direction.

[0047] During the rotation of the reflector 2, each time it rotates one circle, the mirror surface 20 can reflect a line of graphics on the screen 4; during the process of the reflector 2 descending from the highest point to the lowest point, the light beam can reflect a graphic area with four lines on the screen 4, and during the process of the reflector 2 rising from the lowest point to the highest point, the light beam can also display the above-mentioned graphic area with four lines again.

[0048] The length of the graphic line displayed on the screen 4 is determined by the change of the mirror angle (ie, the angle between the curve segment and the rotation axis of the reflector 2).

[0049] The present invention also provides a method for displaying a rotating curved surface reflection graphic, comprising the following steps:

[0050] S1: Turn off the light source 1 and operate the motor 3 to drive the reflector 2 to rotate and move vertically;

[0051] S2: The control software monitors the position of the reflective positioning block 51 twice through the optical sensor 5; and calculates the time period of the reciprocating rise and fall of the reflector 2 according to the time of the two position monitoring, so as to determine the rotation angle and height of the reflector 2 at each moment (that is, determine the corresponding position of the light beam emitted by the light source 1 on the mirror surface 20);

[0052] S3: determining the vertical resolution of the graphic display according to the ratio of the time period of the reciprocating lifting and lowering of the reflector 2 to the time period of one rotation of the reflector 2, and determining the horizontal resolution of the graphic display according to the change of the mirror angle;

[0053] S4: Decomposing the display pattern through the control software and determining the number of pixels in one frame;

[0054] S5: Determine the modulation time displayed by each pixel point according to the time period of the reciprocating rise and fall of the reflector 2.

[0055] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A line-by-line reflective display device, characterized in that: include: A fixed light source (1) capable of emitting a light beam; a rotatably arranged and reciprocatingly raised and lowered reflector (2), used for reflecting the light beam emitted by the light source (1); and A screen (4) for receiving and displaying the light beam reflected by the reflector (2); Wherein, a mirror surface (20) formed as a rotating curved surface is arranged on the side of the reflector (2) for reflecting the light beam onto the screen (4) to form a pattern; The time period for the reciprocating lifting and lowering of the reflector (2) is several times the time period for one rotation of the reflector (2); The longitudinal layered cross section of the mirror surface (20) is substantially in the shape of an involute, so that the light beam is reflected on the screen (4) in the shape of a line; the intersection line of the straight cross section of the reflector (2) and the mirror surface (20) is a curved line segment having an angle with the rotation axis of the reflector (2), so that the mirror surface (20) can reflect the light beam on the screen (4) in the shape of a plurality of lines during the lifting process; The light source (1) is an RGB light source so as to be able to adjust the color of the pattern displayed on the screen (4).

2. The line-by-line reflective display device according to claim 1, characterized in that: The included angle between the curved segment and the rotation axis of the reflector (2) changes evenly and in equal proportion, so that the graphics (11) displayed on the screen (4) transitions linearly and evenly.

3. The line-by-line reflective display device according to claim 1, characterized in that: It also includes a power module for driving the reflector (2) to rotate and reciprocate. The power module includes Motor (3); A gearbox (31) connected to the motor (3), on which a first output wheel (33) and a second output wheel (311) with different rotation speeds are arranged; A rotating shaft (30) which is inserted into the first output wheel (33) in a liftable manner and rotates synchronously with the first output wheel (33); a first lifting link (301) capable of being raised and lowered synchronously with the rotating shaft (30) and rotating asynchronously; and A second lifting link (32), one end of which is hinged to the first lifting link (301), and the other end of which is hinged to an eccentric position of the second output wheel (311); Wherein, the reflective mirror (2) is fixed on the rotating shaft (30); and the rotation speed of the first output wheel (33) is several times the rotation speed of the second output wheel (311).

4. The line-by-line reflective display device according to claim 3, characterized in that: The rotating shaft (30) is provided with a long slot (300) in the vertical direction; the first output wheel (33) is provided with a toggle block (331) embedded in the long slot (300) and capable of rising and falling and floating in the long slot (300), so that the rotating shaft (30) can keep rotating during the rising and falling process.

5. The line-by-line reflective display device according to claim 3, characterized in that: The first lifting link (301) is provided with a ring sleeve; the rotating shaft (30) is provided with a ring groove which can be embedded in the ring sleeve, so that the rotating shaft (30) can rotate relative to the first lifting link (301), and the two can be lifted and lowered synchronously in the vertical direction.

6. The line-by-line reflective display device according to claim 3, characterized in that: A reflective positioning block (51) is disposed on the rotating shaft (30), and a light sensor (5) is fixed on the side of the rotating shaft (30); When the rotation angle and the lifting height of the reflective positioning block (51) are directly opposite to the optical sensor (5), the optical sensor (5) can receive the reflection signal emitted by itself, thereby being able to monitor the position of the reflective positioning block (51) to locate the initial rotation position of the reflective mirror (2) for calibrating the relative coordinates of the display screen image.

7. The line-by-line reflective display device according to claim 6, characterized in that: It also includes control software; the control software is capable of regulating the light intensity of the light source (1) and is capable of monitoring the initial rotation position of the reflector (2) through the light sensor (5).

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