LED double-sided display method and device

Abstract

The invention discloses an LED double-sided display method and device. The method comprises the steps that an LED light source on a PCB substrate is obtained through a semitransparent mirror; transmitting the LED light source transmitted by the semitransparent mirror to the front side to form a first image; receiving the LED light source reflected by the semitransparent mirror by using a reflecting mirror; the LED light source received by the reflector is reflected to the reverse side to form a second image, and double-face display is completed. The device comprises a PCB (Printed Circuit Board) substrate, an LED light source module, a semi-transparent mirror and a reflecting mirror, the LED light source module is arranged on the top surface of the PCB substrate; the semitransparent mirror and the reflecting mirror are arranged above the LED light source module at an interval, the semitransparent mirror is located right above the LED light source module, and the head end of the semitransparent mirror and the head end of the reflecting mirror are close to each other to form a splayed structure covering the LED light source module; the PCB substrate is further provided with a hole, and the reflector reflects the LED light source to the reverse side through the hole. By means of the device, the defects that heat is large, power consumption is large, energy cost is high, manufacturing cost is high, and early-coming equipment is thick can be effectively overcome.

Description

Technical Field

[0001] The invention relates to the field of display panels, and in particular to a method and device for LED double-sided display. Background Art

[0002] With the continuous advancement of science and technology, visual display technology is also developing rapidly. Traditional single-sided display technology is gradually unable to meet the diverse display needs in the market. Therefore, double-sided display technology came into being. The existing double-sided display technology mainly uses two PCB substrates, which are stacked and spliced ​​together, and then both sides of the spliced ​​PCB substrates are covered with LEDs. Through the combination of signal algorithms and circuit control, a technical effect of double-sided display on the front and back screens is formed; however, the existing double-sided display technology requires LEDs to cover the entire PCB substrate, and the structure of the two stacked and spliced ​​PCB substrates is relatively thick, which results in high heat, high power, high manufacturing cost, and thick double-sided display screens. Summary of the invention

[0003] The present invention provides a method and device for LED double-sided display, the device comprises a plurality of groups of LED light source modules, the plurality of groups of LED light source modules are arranged on the top surface of a PCB substrate at intervals, reflectors and half-mirrors are arranged above the plurality of groups of LED light source modules at intervals, wherein the half-mirrors are located directly above the LED light source modules, the head end of the half-mirrors and the head end of the reflectors are close to each other, forming an "eight"-shaped structure covering the top of the LED light source modules; the half-mirrors are used to transmit a part of the LED light to the front to form a first image, and to reflect the LED light to the reflectors, and then reflect the LED light to the back to form a second image via the reflectors. Because only one PCB substrate is used in the device, the high manufacturing cost and the thick double-sided display device caused by using two superimposed and spliced ​​PCB substrates are avoided; in the device, the top surface of the PCB substrate is arranged with a plurality of groups of LED light source modules at intervals, rather than being covered with LED light source modules, thereby avoiding the high heat generation, high power consumption and high energy cost caused by the close arrangement of the LED light source modules.

[0004] In a first aspect, the present invention provides a method for double-sided LED display, comprising:

[0005] Use a half-mirror to obtain the LED light source on the PCB substrate;

[0006] Transmitting the LED light source through the semi-mirror to the front side to form a first image;

[0007] Use a reflector to receive the LED light source reflected by the semi-mirror;

[0008] The LED light source received by the reflector is reflected to the reverse side to form a second image, thus completing double-sided display.

[0009] Furthermore, the half mirror is a physical half mirror or an electrically controlled half mirror. When the half mirror is a physical half mirror, it can transmit n light and reflect 1-n light, wherein the range of n is greater than 0% and less than 100%.

[0010] Furthermore, when the half-mirror is an electrically controlled half-mirror, at the first moment the half-mirror is a full lens, which transmits all the received LED light sources to the front as the first image; at the second moment the half-mirror is a full mirror, which reflects all the received LED light sources to the reflector to form a second image.

[0011] Furthermore, at the second moment, the LED light source is controlled to form an intermediate image, wherein the intermediate image is an image formed by flipping 180° with the vertical central axis of the first image as the center line, and the reflector reflects the intermediate image to form a second image.

[0012] Furthermore, the PCB substrate is provided with apertures, and the apertures are used to transmit the LED light source received by the reflector to the back side as a second image.

[0013] In a second aspect, the present invention further provides a device for LED double-sided display, for implementing the above-mentioned LED double-sided display method, the device comprising:

[0014] It includes a PCB substrate, an LED light source module, a semi-transparent mirror and a reflector;

[0015] The LED light source module is arranged on the top surface of the PCB substrate;

[0016] The half mirror and the reflector are arranged above the LED light source module at intervals, wherein the half mirror is located directly above the LED light source module, and the head end of the half mirror and the head end of the reflector are close to each other, forming an "eight" shaped structure covering the top of the LED light source module.

[0017] Furthermore, the PCB substrate is also provided with a hole, and the reflector is located directly above the hole.

[0018] Furthermore, the semi-transparent mirror and the reflecting mirror are both plane mirrors or both curved mirrors.

[0019] Furthermore, the LED light source module includes multiple groups, each LED light source module is arranged on the top surface of the PCB substrate at intervals, and a half mirror and a reflector with an "eight"-shaped structure are arranged above each LED light source module at intervals.

[0020] Furthermore, the LED light source module is an RGB light source module.

[0021] In summary, the present invention has the following beneficial effects compared with the prior art:

[0022] (1) Only one PCB substrate is used in the device, avoiding the disadvantages of using two superimposed and spliced ​​PCB substrates, which results in high manufacturing cost and thick double-sided display screen.

[0023] (2) In the present device, multiple groups of LED light source modules are arranged at intervals on the top surface of the PCB substrate instead of being evenly distributed with the LED light source modules. The LED light source is transmitted to the front side through a semi-mirror, and is reflected to the reflector through a semi-mirror, and then reflected to the back side through the reflector. This avoids the disadvantages of high heat generation, high power consumption and high energy cost caused by the close arrangement of LEDs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0025] Figure 1 A flow chart of a method for double-sided display of LED;

[0026] Figure 2 It is the light source route map of LED when the half lens is a physical half lens;

[0027] Figure 3 A light source route map of an LED when the half-mirror is an electrically controlled half-mirror at a first moment;

[0028] Figure 4 A light source route map of an LED when the half-mirror is an electrically controlled half-mirror at a second moment;

[0029] Figure 5 is a schematic diagram of a reflector and a semi-transparent mirror both being plane mirrors;

[0030] Figure 6 is a schematic diagram of a reflector and a semi-transparent mirror both being curved mirrors;

[0031] Figure 7 It is a schematic diagram of the process of forming the second image when the image is an asymmetric image.

[0032] Figure name:

[0033] 1-semi-mirror; 2-reflector; 3-PCB substrate; 4-LED light source module. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] 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 one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of the present invention.

[0040] In the following description, suffixes such as "module", "component", "assembly" or "unit" are used only to facilitate the description of the present invention and have no specific meanings. Therefore, they can be used in combination.

[0041] The present invention will be further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0042] At present, the mainstream LED double-sided display technology method on the market mainly uses two superimposed and spliced ​​PCB substrates, and covers both sides of the spliced ​​PCB substrates with LEDs. By coordinating signal algorithms and circuit control, the LED pixel light sources on both sides are transmitted to achieve double-sided display, thereby achieving the technical effect of double-sided display; however, the disadvantages of this method are also obvious. The use of two superimposed and spliced ​​PCB substrates results in high manufacturing costs and thicker double-sided display devices. Thicker display devices appear bulky in modern product designs and cannot meet users' demand for thin and light products, thereby affecting market competitiveness and consumers' willingness to buy; furthermore, since the LEDs need to cover both sides of the entire PCB substrate, the display device generates a lot of heat when working, and long-term use will affect the display effect and even shorten the service life of the device.

[0043] Based on this, the inventors have designed a method that is different from the mainstream double-sided display technology on the market. According to one embodiment of the present invention, Figure 1 As shown, a method for double-sided LED display, the method comprising:

[0044] Use the half mirror 1 to obtain the LED light source on the PCB substrate 3;

[0045] Transmitting the LED light source transmitted by the semi-transparent mirror 1 to the front to form a first image;

[0046] Using a reflector 2 to receive the LED light source reflected by the semi-transparent mirror 1;

[0047] The LED light source received by the reflector 2 is reflected to the reverse side to form a second image, thereby completing double-sided display.

[0048] In the present technical method, a half-mirror 1 is used to obtain the LED light source on the PCB substrate 3, and then the half-mirror 1 is used to transmit the LED light source to the front side, and at the same time, the half-mirror 1 is used to reflect the LED light source to the reflector 2, and the LED light source is reflected to the back side through the reflector 2. In the present method, only one PCB substrate 3 is used, and the LED light source is only arranged on one side of the PCB substrate 3. Using this method can effectively avoid the disadvantages of high manufacturing cost, thick double-sided display screen, high heat generation, high power consumption and high energy cost of the manufactured display device.

[0049] Further, such as Figure 2As shown, the half mirror 1 is a physical half mirror or an electrically controlled half mirror. When the half mirror 1 is a physical half mirror, it can transmit n light and reflect 1-n light, wherein the range of n is greater than 0% and less than 100%.

[0050] When this embodiment is implemented, when the image is a symmetrical image, the half-mirror 1 can select a physical half-mirror. In this embodiment, the selected physical half-mirror has a transmittance of 50% and a reflectivity of 50%. The advantage of this design is that the brightness of the front and back sides of the screen remains consistent, ensuring the user's viewing experience.

[0051] Further, such as Figure 3 and Figure 4 As shown, when the half-mirror 1 is an electrically controlled half-mirror, at the first moment the half-mirror 1 is a full lens, and the full lens transmits all the received LED light sources to the front as the first image; at the second moment the half-mirror 1 is a full mirror, and the full mirror reflects all the received LED light sources to the reflector 2 to form a second image.

[0052] When this embodiment is implemented, when the image formed by the LED light source is a symmetrical or asymmetrical image, the half-mirror 1 can select an electrically controlled half-mirror, and the evenly distributed LED light source modules, the half-mirror 1 and the reflector 2 array display the image. The evenly distributed LED light source array is arranged and combined in a grid or other regular shape to form a two-dimensional plane image. At the first moment, the evenly distributed half-mirror 1 array is a full lens with a transmittance of 100% and a reflectivity of 0%. At the first moment, the received LED light source image can be fully transmitted to the front to form a first image; at the second moment, the half-mirror 1 array is adjusted by the electronic control system to be converted into a full mirror, and its The transmittance is 0% and the reflectance is 100%; at the same time, the image formed by the LED light source array is flipped through the electronic control system, and the semi-mirror 1 array reflects all the flipped LED light sources to the reflector 2 array, and the reflector 2 array reflects all the received LED light sources to the back side to form a second image; in this embodiment, compared with the physical semi-mirror 1, the brightness of the front and back screens can reach 100%, the picture is clearer, and the user's viewing experience can be improved; in addition, in this technical method, the transmittance and reflectivity of the semi-mirror 1 are switched back and forth between the first moment and the second moment through the electronic control system, and the LED light source is controlled to flip back and forth. Its switching frequency and flipping frequency are relatively high, such as 45HZ\60HZ\75HZ\120HZ\145HZ, etc., and the state transition can be completed at the microsecond level. The above values ​​are only used as examples; this fast switching and fast flipping are sufficient to make up for the frame rate loss of the second image compared to the first image, so that the first image and the second image remain consistent; although there is only transmitted light at the first moment and only reflected light at the second moment, that is, the real image and the virtual image of the LED light source are displayed alternately, but the alternation frequency cannot be perceived by the human eye, so the real image and the virtual image of the LED light source exist at the same time in the human eye.

[0053] Further, such as Figure 7 As shown, at the second moment, the LED light source is controlled to form an intermediate image, wherein the intermediate image is an image formed by flipping 180° with the vertical central axis of the first image as the center line, and the reflector 2 reflects the intermediate image to form a second image.

[0054] When this embodiment is implemented, for example, Figure 7 The left side is an image formed by the LED light source at the first moment, and the densely arranged LED light source, the semi-transparent mirror and the reflector array are displayed. Figure 7 The middle image is an intermediate image formed by controlling the LED light source at the second moment. The intermediate image is an image formed by flipping 180° with the vertical central axis of the first image as the center line. Figure 7The image on the right is the second image formed by being reflected by the mirror 2 to the reverse side at the second moment. At this time, the front and the reverse side still present the images of the Chinese characters and letter combinations of "bottle" and "genjubenfaming", and the two always tend to be consistent in the picture.

[0055] Furthermore, as Figure 2 to Figure 4 shown, the PCB substrate 3 is provided with pores, and the pores are used to transmit the LED light source received by the mirror 2 to the reverse side as the second image.

[0056] When this embodiment is implemented, the PCB substrate 3 can be set as multiple groups, and the multiple groups of PCB substrates 3 are arranged at intervals from each other to form a single PCB substrate 3 with multiple groups of pores reserved; in addition, the PCB substrate 3 can also be set as a whole board, and multiple groups of pores are opened on the whole board, and the mirror 2 uses the pores to transmit the received LED light source to the reverse side as the second image.

[0057] Furthermore, as Figure 2 to Figure 4 shown, the present invention also provides a device for LED double-sided display for implementing the above-mentioned method for LED double-sided display, including a PCB substrate 3, an LED light source module 4, a semi-transparent mirror 1 and a mirror 2;

[0058] The LED light source module 4 is arranged on the top surface of the PCB substrate 3;

[0059] The semi-transparent mirror 1 and the mirror 2 are arranged at intervals above the LED light source module 4. Among them, the semi-transparent mirror 1 is located directly above the LED light source module 4, and the head ends of the semi-transparent mirror 1 and the mirror 2 are close to each other, forming an "eight" - shaped structure covering above the LED light source module 4.

[0060] When this embodiment is implemented, the PCB substrate 3 can be selected as a flexible printed circuit board or a rigid printed circuit board; the semi-transparent mirror 1 can be a semi-transparent and semi-reflective coated mirror, or can be an electro-controlled mirror, and its transmittance and reflectivity can be controlled by power on. The mirror 2 is a fully reflective coated mirror; among them, the semi-transparent mirror 1, the mirror 2 and the LED light source module 4 can be encapsulated into an integral component. By encapsulating the above components into an integral component, the docking error between components can be effectively reduced, ensuring the accuracy of the optical path, thereby improving the consistency of the display effect of the display device; in addition, the semi-transparent mirror 1 is located directly above the LED light source module 4, and its purpose is to completely cover the LED light source, so as to receive all the LED light sources and prevent the reduction of resolution and brightness caused by the loss of LED light sources.

[0061] Furthermore, the PCB substrate 3 is also provided with pores, and the mirror 2 is located directly above the pores.

[0062] When this embodiment is implemented, in order to avoid loss of resolution and brightness, all the LED light sources received by the reflector 2 need to be reflected to the back side; therefore, the reflector 2 is arranged directly above the aperture.

[0063] Further, such as Figure 5 and Figure 6 As shown, the semi-transparent mirror 1 and the reflecting mirror 2 are both plane mirrors or both curved mirrors.

[0064] Further, such as Figure 2 to Figure 4 As shown, the LED light source module 4 includes multiple groups, each of the LED light source modules 4 is arranged on the top surface of the PCB substrate 3 at intervals, and the semi-mirror 1 and the reflector 2 with an "eight"-shaped structure are arranged above each of the LED light source modules 4 at intervals.

[0065] When the present embodiment is implemented, the PCB substrate 3 can be arranged in multiple groups or in a whole board; when the PCB substrate 3 is arranged in multiple groups, each PCB substrate 3 is provided with an LED light source module 4, and multiple groups of PCB substrates 3 are spaced apart from each other, so that each LED light source module 4 is spaced apart from each other; when the PCB substrate 3 is arranged in a whole board, multiple groups of LED light source modules 4 spaced apart from each other are arranged on the PCB substrate 3. Such a design reduces the manufacturing cost while further reducing the disadvantages of the display device such as high heat generation, high power consumption and high energy cost.

[0066] Furthermore, the LED light source module 4 is an RGB light source module.

[0067] When this embodiment is implemented, the RGB light source module is composed of light source components of three basic colors: red, green, and blue; this module has the characteristics of energy saving and environmental protection. Compared with traditional light source modules, the RGB light source module has higher energy efficiency, lower energy consumption, and longer service life.

[0068] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for double-sided LED display, characterized in that: The method comprises: Use a half-mirror to obtain the LED light source on the PCB substrate; Transmitting the LED light source through the semi-mirror to the front side to form a first image; Using a reflector to receive the LED light source reflected by the semi-mirror; The LED light source received by the reflector is reflected to the reverse side to form a second image, thereby completing double-sided display.

2. The method of double-sided LED display according to claim 1, characterized in that: The half mirror is a physical half mirror or an electrically controlled half mirror. When the half mirror is a physical half mirror, it can transmit n light and reflect 1-n light, wherein the range of n is greater than 0% and less than 100%.

3. The method of double-sided LED display according to claim 2, characterized in that: When the half-mirror is an electrically controlled half-mirror, at the first moment the half-mirror is a full lens, and the full lens transmits all the received LED light sources to the front as the first image. At the second moment the half-mirror is a full mirror, and the full mirror reflects all the received LED light sources to the reflector to form a second image.

4. The LED double-sided display method according to claim 3, characterized in that: At the second moment, the LED light source is controlled to form an intermediate image, wherein the intermediate image is an image formed by flipping 180° with the vertical central axis of the first image as the center line, and the reflector reflects the intermediate image to form a second image.

5. The LED double-sided display method according to claim 1, characterized in that: The PCB substrate is provided with apertures, and the apertures are used to transmit the LED light source received by the reflector to the back side as a second image.

6. A device for LED double-sided display for implementing the method described in any one of claims 1 to 5, characterized in that: It includes a PCB substrate, an LED light source module, a semi-transparent mirror and a reflector; The LED light source module is arranged on the top surface of the PCB substrate; The semi-mirror and the reflector are arranged above the LED light source module with intervals, wherein the semi-mirror is located directly above the LED light source module, and the head end of the semi-mirror and the head end of the reflector are close to each other, forming an "eight"-shaped structure covering the top of the LED light source module.

7. The LED double-sided display device according to claim 6, characterized in that: The PCB substrate is also provided with a hole, and the reflector is located directly above the hole.

8. The LED double-sided display device according to claim 6, characterized in that: The semi-transparent mirror and the reflecting mirror are both plane mirrors or curved mirrors.

9. The LED double-sided display device according to claim 6, characterized in that: The LED light source modules include a plurality of groups, each of the LED light source modules is spaced apart from each other on the top surface of the PCB substrate, and each of the LED light source modules is spaced apart from each other with a half mirror and a reflector having an "eight"-shaped structure above them.

10. The LED double-sided display device according to claim 6, characterized in that: The LED light source module is an RGB light source module.

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