Large display screen based on long-afterglow luminescent material

Abstract

The invention discloses a large display screen based on a long-afterglow luminescent material, and the large display screen is characterized in that a first laser is used for emitting a light beam, the light beam sequentially enters a light beam horizontal deflector and a light beam vertical deflector and then reaches a long-afterglow screen, light spots are formed on the long-afterglow screen, and the light spots brighten the long-afterglow luminescent material on the long-afterglow screen; the light beam horizontal deflector is used for enabling the light spots to circularly move from one side of the long afterglow screen to the other opposite side in the horizontal direction at a preset speed; the light beam vertical deflector is used for enabling the light spot to move downwards by one line after the light spot completes horizontal scanning of one period, and the steps are repeated; the laser modulator is used for modulating the first laser according to a modulation code corresponding to the input image and controlling the first laser to be turned on or turned off; and the long afterglow screen is used for displaying an image corresponding to the input image. According to the large display screen, the size, energy consumption and cost of equipment can be effectively reduced, and batch production, popularization and application are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of displays, and in particular to a large display screen based on long afterglow luminescent materials. Background Art

[0002] The display is the output unit of electronic devices and an important medium for human-computer interaction. It is widely used in computers, mobile phones, video surveillance systems, advertising and other fields. Its development process has gone through various stages such as CRT displays, LCD displays, and Micro-LED, and it has become relatively mature.

[0003] For large-size screens used for advertising and publicity, due to their large size and low resolution requirements, LED array solutions are mainly used. By controlling the switch of three-color LEDs, colorful dynamic patterns can be displayed. The effect can meet daily needs.

[0004] However, large-size screens using LED arrays also have very obvious disadvantages, mainly high energy consumption, complex structure, high installation and maintenance costs, etc. In some application scenarios that do not require high dynamic effects, such as bus stops and curtain wall advertisements, the input-output ratio is not ideal. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present invention is to propose a large display screen based on long afterglow luminescent materials, which can effectively reduce the volume, energy consumption and cost of the device compared with the existing LED display screen, and is conducive to mass production and popularization and application.

[0006] To achieve the above-mentioned purpose, the first aspect of the present invention proposes a large display screen based on long afterglow luminescent material, comprising: a first laser, a horizontal beam deflector, a vertical beam deflector, a long afterglow screen and a laser modulator, wherein the long afterglow screen is coated with a long afterglow luminescent material; the first laser is used to emit a light beam, which enters the horizontal beam deflector and the vertical beam deflector in sequence and then reaches the long afterglow screen, and forms a light spot on the long afterglow screen, and the light spot illuminates the long afterglow luminescent material on the long afterglow screen; the horizontal beam deflector is used to make The light spot moves cyclically from one side of the long afterglow screen to the other side thereof in the horizontal direction at a preset speed, wherein the process of the light spot moving from one side of the long afterglow screen to the other side thereof in the horizontal direction is one cycle; the vertical beam deflector is used to move the light spot down one line after the light spot completes one cycle of horizontal scanning, and repeat this cycle; the laser modulator is used to modulate the first laser according to the modulation code corresponding to the input image, and control the first laser to turn on or off; the long afterglow screen is used to display an image corresponding to the input image.

[0007] According to the large display screen based on long afterglow luminescent material of the embodiment of the present invention, the light beam emitted by the first laser enters the horizontal beam deflector and the vertical beam deflector in sequence, reaches the long afterglow screen, and forms a light spot on the long afterglow screen, and the light spot illuminates the long afterglow luminescent material on the long afterglow screen. Among them, the horizontal beam deflector can deflect the light beam in the horizontal direction, so that the light spot can be cyclically moved from one side of the long afterglow screen to the other side in the horizontal direction at a preset speed. The vertical beam deflector can move the light spot down one line after the light spot completes a cycle of horizontal scanning, and keep circulating. In this way, under the joint action of the horizontal beam deflector and the vertical beam deflector, the light spot will traverse each unit of the long afterglow screen in sequence. In this process, the laser modulator modulates the first laser according to the modulation code corresponding to the input image, controls its opening and closing, and then some positions of the long afterglow screen will be illuminated, while the rest of the positions will not be illuminated, forming a black and white pattern, that is, the image corresponding to the input image. Since the long afterglow material on the long afterglow screen does not go out immediately after being lit, a complete pattern can be displayed. Therefore, compared with the existing LED display screens, the display screen can effectively reduce the size, energy consumption and cost of the device, which is conducive to mass production and promotion and application.

[0008] In addition, the large display screen based on the long afterglow luminescent material according to the above embodiment of the present invention may also have the following additional technical features:

[0009] According to one embodiment of the present invention, the long afterglow luminescent material is SrAl2O4:Eu,Dy.

[0010] According to one embodiment of the present invention, the horizontal beam deflector includes: a first reflection unit, the first reflection unit is a polygonal prism structure, and the number of cross-sectional edges of the first reflection unit is greater than or equal to 3; a first stepper motor, the first stepper motor is used to drive the first reflection unit so that the first reflection unit rotates at a first preset speed with the longitudinal axis of the first reflection unit as the center.

[0011] According to one embodiment of the present invention, the vertical light beam deflector includes: a second reflection unit, the structure of the second reflection unit is the same as that of the first reflection unit, and the second reflection unit is arranged at a 90° angle to the first reflection unit; a second stepper motor, the second stepper motor is used to drive the second reflection unit so that the second reflection unit rotates at a second preset speed with the longitudinal axis of the second reflection unit as the center, wherein the second preset speed is the ratio of the first preset speed to the width of the long afterglow screen.

[0012] According to an embodiment of the present invention, the first reflective unit and the second reflective unit are both made of K9 glass, and the side surfaces of the first reflective unit and the second reflective unit are both plated with aluminum.

[0013] According to an embodiment of the present invention, the laser modulator controls the first laser to turn on in a power-on state, and controls the first laser to turn off in a power-off state.

[0014] According to another embodiment of the present invention, the laser modulator controls the first laser to be turned off by blocking the light path.

[0015] According to an embodiment of the present invention, the light beam output by the first laser is one of ultraviolet light, violet light and blue light.

[0016] According to an embodiment of the present invention, the large display screen further includes: a second laser, the light beam output by the second laser is infrared light, and the wavelength of the infrared light is 980nm or 1064nm.

[0017] According to an embodiment of the present invention, the light beam output by the first laser and the light beam output by the second laser are combined into one beam by a beam combiner.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A block diagram of a large display screen based on a long afterglow luminescent material according to an embodiment of the present invention;

[0020] Figure 2 A diagram showing the coding and display effects according to an embodiment of the present invention;

[0021] Figure 3 A top view of the structure of a large display screen based on a long afterglow luminescent material according to an embodiment of the present invention;

[0022] Figure 4 A structural front view of a large display screen based on a long afterglow luminescent material according to an embodiment of the present invention;

[0023] Figure 5 FIG. 4 is a block diagram of a beam combiner according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] 1. First laser; 2. Horizontal beam deflector; 21. First reflection unit; 22. First stepper motor; 3. Vertical beam deflector; 31. Second reflection unit; 32. Second stepper motor; 4. Long afterglow screen; 5. Laser modulator; 6. Second laser; 7. Beam combiner. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The following describes a large display screen based on a long afterglow luminescent material proposed in an embodiment of the present invention with reference to the accompanying drawings.

[0028] Figure 1 Schematic diagram of a large display screen based on long afterglow luminescent materials according to an embodiment of the present invention.

[0029] like Figure 1As shown, the large display screen based on the long afterglow luminescent material of the embodiment of the present invention may include: a first laser 1, a horizontal beam deflector 2, a vertical beam deflector 3, a long afterglow screen 4 and a laser modulator 5, wherein the long afterglow screen 4 is coated with the long afterglow luminescent material; the first laser 1 is used to emit a light beam, which enters the horizontal beam deflector 2 and the vertical beam deflector 3 in sequence, and then reaches the long afterglow screen 4, and forms a light spot on the long afterglow screen 4, and the light spot illuminates the long afterglow luminescent material on the long afterglow screen 4; the horizontal beam deflector 2 is used to make the light beam The spot moves cyclically from one side of the long afterglow screen 4 to the other side thereof in the horizontal direction at a preset speed, wherein the process of the spot moving from one side of the long afterglow screen 4 to the other side thereof in the horizontal direction is one cycle; the vertical beam deflector 3 is used to move the spot down one line after the spot completes one cycle of horizontal scanning, and repeat this cycle; the laser modulator 5 is used to modulate the first laser 1 according to the modulation code corresponding to the input image, and control the first laser 1 to turn on or off; the long afterglow screen 4 is used to display the image corresponding to the input image.

[0030] Specifically, the light beam emitted by the first laser 1 enters the horizontal beam deflector 2 and the vertical beam deflector 3 in sequence, and then reaches the long afterglow screen 4, and forms a light spot on the long afterglow screen 4, and the light spot illuminates the long afterglow luminescent material on the long afterglow screen 4. Among them, the horizontal beam deflector 2 can deflect the light beam in the horizontal direction, so that the light spot can be cyclically moved from one side of the long afterglow screen 4 to the other opposite side in the horizontal direction at a preset speed. For example, the horizontal beam deflector 2 can make the light spot move from the left side of the long afterglow screen 4 to the right side in the horizontal direction from left to right at a preset speed. When it moves to the rightmost side, it moves from the leftmost side to the right at a preset speed, and repeats this cycle. The vertical beam deflector 3 can move the light spot down one line after the light spot completes a cycle of horizontal scanning, and the cycle continues. In this way, under the joint action of the horizontal beam deflector 2 and the vertical beam deflector 3, the light spot will traverse each unit of the long afterglow screen 4 in sequence. In this process, the laser modulator 5 modulates the first laser 1 according to the modulation code corresponding to the input image, and controls its on and off, so that some positions of the long afterglow screen 4 will be lit, while the rest will not be lit, forming a black and white pattern, that is, the image corresponding to the input image. Since the long afterglow material on the long afterglow screen 4 will not be extinguished immediately after being lit, the complete pattern can be displayed.

[0031] For example, Figure 2As shown, the input image is the two Chinese characters "中国" (China). The laser modulator 5 modulates the first laser 1 according to the modulation code corresponding to the input image, controlling its on and off states. As a result, certain positions on the long-afterglow screen 4 will be illuminated, while the remaining positions will not, forming a black-and-white pattern, thereby displaying the image corresponding to the input image "中国" on the long-afterglow screen 4.

[0032] According to an embodiment of the present invention, the long-afterglow luminescent material is SrAl2O4:Eu,Dy, which is uniformly coated on a transparent acrylic plate with a coating thickness of 0.1 mm. The size of the long-afterglow screen 4 is 1000*1000 mm.

[0033] Specifically, the SrAl2O4:Eu,Dy material, namely strontium aluminate phosphate (SrAl2O4) doped with europium (Eu) and dysprosium (Dy), has a high luminescence efficiency, generates strong luminescence under low excitation energy, has a long-afterglow property, and can continue to emit light for a long time after the excitation source is removed. It also has high brightness and brightness retention, and can maintain a high brightness level after excitation, with a slow brightness decay. Additionally, it has advantages such as good chemical stability, low toxicity, and low cost.

[0034] According to an embodiment of the present invention, as Figure 3 and Figure 4 shown, the beam horizontal deflector 2 includes: a first reflection unit 21, the first reflection unit 21 is a multi-prism structure, and the number of sides of the cross-section of the first reflection unit 21 is greater than or equal to 3; a first stepping motor 22, the first stepping motor 22 is used to drive the first reflection unit 21 to rotate the first reflection unit 21 around its longitudinal axis at a first preset rotation speed. Among them, the first preset rotation speed can be calibrated according to the actual situation.

[0035] According to an embodiment of the present invention, as Figure 3 and Figure 4 shown, the beam vertical deflector 3 includes: a second reflection unit 31, the structure of the second reflection unit 31 is the same as that of the first reflection unit 21, and the second reflection unit 31 is arranged at a 90° angle to the first reflection unit 21; a second stepping motor 32, the second stepping motor 32 is used to drive the second reflection unit 31 to rotate the second reflection unit 31 around its longitudinal axis at a second preset rotation speed, where the second preset rotation speed is the ratio of the first preset rotation speed to the width of the long-afterglow screen 4. For example, when the width of the long-afterglow screen 4 is 1000 mm, the second preset rotation speed is 1 / 1000 of the first preset rotation speed.

[0036] According to an embodiment of the present invention, the first reflective unit 21 and the second reflective unit 31 are both made of K9 glass, and the side surfaces of the first reflective unit 21 and the second reflective unit 31 are both plated with aluminum.

[0037] For example, Figure 3 and Figure 4 As shown, the horizontal beam deflector 2 and the vertical beam deflector 3 are both reflective, the first reflective unit 21 and the second reflective unit 31 can both be 6-prism structures, both made of K9 glass, the 6 side surfaces are aluminum-plated, 10 mm high, 5 mm side width, the first stepper motor 22 and the second stepper motor 32 have a driving voltage of 6V, a maximum speed of 6000 rpm, and a PWM speed regulation function. The first reflective unit 21 is driven by the first stepper motor 22 and rotates at a constant speed at a first preset speed with its longitudinal axis as the center; the second reflective unit 31 is driven by the second stepper motor 32 and rotates at a constant speed at a second preset speed with its longitudinal axis as the center.

[0038] Specifically, refer to Figure 3 and Figure 4 , the light beam emitted by the first laser 1 irradiates the horizontal beam deflector 2, is reflected by one side of the first reflection unit 21 to the second reflection unit 31 of the vertical beam deflector 3, and then forms a light spot from the second reflection unit 31 to the long afterglow screen 4, and because the first stepper motor 22 drives the first reflection unit 21 to rotate at a constant speed, the light spot moves from one side of the long afterglow screen 4 to the other side at a preset speed in the horizontal direction. With the uniform rotation of the first stepper motor 22, when switching to the next side reflection beam of the first reflection unit 21, the light spot completes a horizontal movement and starts to move from one side of the long afterglow screen 4 to the other side in the horizontal direction again. At this time, the second reflection unit 31 moves the light spot down one line and keeps circulating. In this way, under the joint action of the horizontal beam deflector 2 and the vertical beam deflector 3, the light spot will traverse each unit of the long afterglow screen 4 in sequence.

[0039] According to one embodiment of the present invention, the laser modulator 5 controls the first laser 1 to turn on in a power-on state, and controls the first laser 1 to turn off in a power-off state.

[0040] Specifically, the laser modulator 5 is powered on or off according to the modulation code corresponding to the image. For example, when the modulation code is "1", the laser modulator 5 is powered off, controls the first laser 1 to be turned off, and stops emitting a light beam; when the modulation code is "0", the laser modulator 5 is powered on, controls the first laser 1 to start emitting a light beam.

[0041] According to another embodiment of the present invention, the laser modulator 5 controls the first laser 1 to be turned off by blocking the light path.

[0042] Specifically, the laser modulator 5 blocks the light path of the first laser 1 according to the modulation code corresponding to the image. For example, when the modulation code is "1", the laser modulator 5 blocks the light path, controls the first laser 1 to turn off, and stops emitting the light beam; when the modulation code is "0", the laser modulator 5 does not block the light path, and controls the first laser 1 to turn on the emission light beam.

[0043] According to an embodiment of the present invention, the light beam output by the first laser 1 is one of ultraviolet light, purple light and blue light. When the light beam output by the first laser 1 is blue light, the central wavelength is 450 nm.

[0044] According to one embodiment of the present invention, Figure 5 As shown, the large display screen also includes: a second laser 6, the light beam output by the second laser 6 is infrared light, and the wavelength of the infrared light is 980nm or 1064nm.

[0045] According to one embodiment of the present invention, Figure 5 As shown, the light beam output by the first laser 1 and the light beam output by the second laser 6 are combined into one beam by a beam combiner 7 .

[0046] The afterglow time of the long afterglow screen 4 can be adjusted by adding infrared light.

[0047] After testing, the large display screen based on long afterglow luminescent materials of the embodiment of the present invention can correctly display static patterns after inputting modulation signals, the patterns can be edited, and without adding infrared signals to adjust the afterglow time, two different patterns can be switched in about 10 minutes.

[0048] In summary, according to the large display screen based on long afterglow luminescent materials in the embodiment of the present invention, the light beam emitted by the first laser enters the horizontal beam deflector and the vertical beam deflector in sequence, reaches the long afterglow screen, and forms a light spot on the long afterglow screen, and the light spot illuminates the long afterglow luminescent material on the long afterglow screen. Among them, the horizontal beam deflector can deflect the light beam in the horizontal direction, so that the light spot can be cyclically moved from one side of the long afterglow screen to the other side at a preset speed in the horizontal direction. The vertical beam deflector can move the light spot down one line after the light spot completes a cycle of horizontal scanning, and keep circulating. In this way, under the joint action of the horizontal beam deflector and the vertical beam deflector, the light spot will traverse each unit of the long afterglow screen in sequence. In this process, the laser modulator modulates the first laser according to the modulation code corresponding to the input image, controls its opening and closing, and then some positions of the long afterglow screen will be illuminated, while the rest of the positions will not be illuminated, forming a black and white pattern, that is, the image corresponding to the input image. Since the long afterglow material on the long afterglow screen does not go out immediately after being lit, a complete pattern can be displayed. Therefore, compared with the existing LED display screens, the display screen can effectively reduce the size, energy consumption and cost of the device, which is conducive to mass production and promotion and application.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A large display screen based on long afterglow luminescent materials, characterized in that: include: A first laser, a horizontal beam deflector, a vertical beam deflector, a long afterglow screen and a laser modulator, wherein the long afterglow screen is coated with a long afterglow luminescent material; The first laser is used to emit a light beam, and after the light beam enters the horizontal light beam deflector and the vertical light beam deflector in sequence, it reaches the long afterglow screen and forms a light spot on the long afterglow screen, and the light spot illuminates the long afterglow luminescent material on the long afterglow screen; The horizontal beam deflector is used to make the light spot move from one side of the long afterglow screen to the other side of the opposite side in a horizontal direction at a preset speed cyclically, wherein the process of the light spot moving from one side of the long afterglow screen to the other side of the opposite side in the horizontal direction is one cycle; The vertical deflector of the light beam is used to move the light spot down one line after the light spot completes a cycle of horizontal scanning, and repeat this cycle; The laser modulator is used to modulate the first laser according to the modulation code corresponding to the input image, and control the first laser to be turned on or off; The long persistence screen is used to display an image corresponding to the input image.

2. The large display screen based on the long afterglow luminescent material according to claim 1 is characterized in that: The long afterglow luminescent material is SrAl2O4:Eu,Dy.

3. The large display screen based on the long afterglow luminescent material according to claim 1 is characterized in that: The horizontal beam deflector comprises: A first reflecting unit, wherein the first reflecting unit is a polygonal column structure, and the number of sides of the cross section of the first reflecting unit is greater than or equal to 3; A first stepper motor is used to drive the first reflection unit so that the first reflection unit rotates at a first preset speed around the longitudinal axis of the first reflection unit.

4. The large display screen based on the long afterglow luminescent material according to claim 3 is characterized in that: The vertical beam deflector comprises: A second reflecting unit, wherein the structure of the second reflecting unit is the same as that of the first reflecting unit, and the second reflecting unit and the first reflecting unit are arranged at an angle of 90°; A second stepper motor, the second stepper motor is used to drive the second reflection unit so that the second reflection unit rotates at a second preset speed with the longitudinal axis of the second reflection unit as the center, wherein the second preset speed is the ratio of the first preset speed to the width of the long afterglow screen.

5. The large display screen based on the long afterglow luminescent material according to claim 4 is characterized in that: The first reflection unit and the second reflection unit are both made of K9 glass, and the side surfaces of the first reflection unit and the second reflection unit are both plated with aluminum.

6. The large display screen based on the long afterglow luminescent material according to claim 1, characterized in that: The laser modulator controls the first laser to turn on in a power-on state, and controls the first laser to turn off in a power-off state.

7. The large display screen based on the long afterglow luminescent material according to claim 1 is characterized in that: The laser modulator can also control the first laser to be turned off by blocking the light path.

8. The large display screen based on long afterglow luminescent material according to claim 1, characterized in that: The light beam output by the first laser is one of ultraviolet light, violet light and blue light.

9. The large display screen based on the long afterglow luminescent material according to claim 8, characterized in that: The large display screen also includes: a second laser, the light beam output by the second laser is infrared light, and the wavelength of the infrared light is 980nm or 1064nm.

10. The large display screen based on the long afterglow luminescent material according to claim 9, characterized in that: The light beam output by the first laser and the light beam output by the second laser are combined into one beam through a beam combiner.

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