CN114283702B - Micro-spacing LED display screen module based on RGB split array - Google Patents
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Abstract
The invention relates to a micro-spacing LED display screen module based on an RGB split array, and belongs to the technical field of LED display screens. The light source is R, G, B high-power monochromatic LED lamp beads, and light rays emitted by the light source are projected onto the rear panel after passing through the corresponding light valve array; the light valve array can control the output intensity of the light path, and the light valve array is divided into three spatially independent areas corresponding to R, G, B single-color LED lamp beads respectively; each output pixel point on the front panel is connected with R, G, B sub-pixel points on the rear panel by using an optical fiber bundle formed by three optical fibers to transmit light; the control panel is used for controlling the monochromatic LED lamp beads and the light valve array; a lampshade which can uniformly collect the light to the input surface of the light valve array is arranged between the light source and the light valve array. The LED single lamp with high power R, G, B is used in the invention, and can adjust light independently, and the dynamic energy consumption is low. The present invention does not require additional fittings.
Description
Technical Field
The invention relates to a micro-spacing LED display screen module based on an RGB split array, and belongs to the technical field of LED display screens.
Background
Current display technologies mainly include LED screens, OLED screens, LCD screens, projection screens (DLP, LCD, etc.).
The projection screen (or projection splice screen) needs to project light on a white background, has low brightness and poor contrast, and is suitable for darker environments.
The LCD screen has high brightness, black background and high contrast, but with the increase of the size of a single screen, the manufacturing cost per unit area increases sharply, and the LCD screen is only suitable for medium and small screens. The LCD screen is spliced into a large screen, and because the LCD screen uses glass as a carrier and TFT manufacturing processes, the display area must be smaller than the glass carrier, and the necessary structural outer frame, the seamless splicing cannot be achieved visually. Moreover, the LCD screen has low effective utilization rate of light and low energy efficiency because of adopting a color filter film.
The OLED screen emits light actively, the effective utilization rate of light is high, and the substrate can be made of flexible materials, but the OLED screen is also based on a TFT technology and is only suitable for medium and small screens.
The LED screen is formed by assembling a large number of low-power LED lamp beads on a PCB into an array form to form a module, and then splicing the module into a large screen to realize visual seamless splicing. As the pixel pitch continues to shrink below 2mm, the size limitation of the LED lamp bead package housing becomes the bottleneck of the traditional single lamp assembly manufacturing process. The amount of devices per unit area is proportional to the square of the inverse of the pixel pitch, and devices on the order of millions per square meter rapidly deteriorate many performance metrics. Comprising the following steps: 1. the manufacturing scale is increased sharply, and the investment of the production line is increased sharply; 2. the average failure-free time is drastically reduced, and the reliability is seriously deteriorated; 3. the smaller the LED is, the worse the protection capability of the shell of the LED and the module is, the more easily damaged, and the manufacturing, transporting, installing and maintaining costs are greatly increased; 4. the LED module adopts progressive lighting scanning driving, stable images are displayed by utilizing the visual persistence principle, the corresponding PCB area is reduced along with the increase of the density of LEDs, and if the driving circuit is increased in equal proportion, the PCB is difficult to accommodate, so that higher frequency scanning is adopted to reduce the consumption of the driving circuit, but larger electromagnetic radiation is brought, and the electromagnetic pollution is aggravated.
Currently, three new technical routes of LEDs are mainly COB, miniLED, microLED.
COB (Chip On Board), namely, packaging a plurality of LED bare chips on a substrate, and then packaging the LED bare chips into a device, and using the COB device to assemble a display screen, so that the manufacturing scale of an assembly link is reduced. However, other disadvantages of the conventional small-pitch LED screen are not solved, and the defects of surface reflection, poor consistency of ground color, reduced contrast, difficulty in single-point repair and the like are newly generated. Also, there is a bottleneck in the pixel pitch of 1mm or less.
MiniLED is to mount the LED chips on the glass substrate in an array manner at a smaller interval (50 um-200 um), attach the LED chips on the back surface of the glass of the LCD display screen, and use the LED chips as a backlight source to realize regional dimming, so that the backlight of the LCD is more uniform, and the dynamic energy consumption of the LCD screen can be reduced. At present, the LED display device is not applied to the field of LED large-screen display.
MicroLED is an LED chip smaller than 50um, which is one of the current research hot spots, but the necessary technologies such as mass transfer and the like have not been broken through. MicroLED can be used for manufacturing medium and small-sized display screens, and various problems exist in manufacturing large-screen display screens.
Disclosure of Invention
The invention aims to provide a micro-spacing LED display screen module based on an RGB split array.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The light source of the micro-space LED display screen module based on the RGB split array is R, G, B high-power monochromatic LED lamp beads, and the light emitted by the light source is projected onto the rear panel after passing through the corresponding light valve array; the light valve array can control the output intensity of the light path, and the light valve array is divided into three spatially independent areas corresponding to R, G, B single-color LED lamp beads respectively; the light valve is not provided with a color filter; each output pixel point on the front panel is connected with R, G, B sub-pixel points on the rear panel by using an optical fiber bundle formed by three optical fibers to transmit light; the control panel is used for controlling the monochromatic LED lamp beads and the light valve array; a lampshade which can uniformly collect the light to the input surface of the light valve array is arranged between the light source and the light valve array.
The technical scheme of the invention is further improved as follows: each area of the light valve array includes M rows by N columns of light valves; the light valve is not provided with a color filter.
The technical scheme of the invention is further improved as follows: the rear panel, the optical fiber array and the front panel are light guide components; the front panel is larger in size than the rear panel.
The technical scheme of the invention is further improved as follows: each optical fiber bundle is provided with 3 optical fibers, each optical fiber is respectively communicated with one output light path in the three light valve partitions, and after the 3 light paths are converged, each optical fiber bundle is connected with one output pixel point of the front panel.
The technical scheme of the invention is further improved as follows: the monochromatic LED lamp beads, the lamp shade and the light valve array are all installed on the light guide component, and an assembling structure for splicing and installing between the modules is arranged on the light guide component.
The technical scheme of the invention is further improved as follows: the light valve is a liquid crystal light valve.
By adopting the technical scheme, the invention has the following technical effects:
the invention can greatly reduce the consumption of LED lamp beads and a driving circuit by using a high-power R, G, B LED single lamp, and the reduction range reaches several orders of magnitude, thereby reducing the manufacturing scale, reducing the investment of a production line and improving the production efficiency. As the number of the light sources is greatly reduced, the probability of faults of the display screen is obviously reduced, the average fault-free time is improved, and the reliability is improved.
According to the invention, the LED single lamps R, G, B are arranged, each single lamp can be used for independently dimming, and the dynamic energy consumption is further reduced.
The invention is provided with the light valve array, and the light path is controlled by the light valve array without controlling large current, thereby reducing electromagnetic radiation and being more environment-friendly.
The light valve of the invention does not have a color filter, the effective utilization rate and the energy efficiency of light are 3 times of that of a liquid crystal screen, and the energy is saved.
The number of the LEDs of the light source is reduced, so that the size of an electric part can be reduced, the LED can be packaged in a closed shell, the protection level of the shell is improved, and the LED light source is suitable for a more severe application environment.
The light-guiding rear panel of the invention uses the optical fiber to project the output of the light valve array onto the front panel of the display screen, thereby enlarging the pixel spacing, increasing the structural strength and enhancing the capability of collision damage resistance. The display screen module can prevent dust, water, condensation and salt fog corrosion.
The LED single lamp with high power R, G, B is used in the invention, and can adjust light independently, and the dynamic energy consumption is low. The present invention does not require additional fittings such as a precision grating lens.
Drawings
FIG. 1 is a schematic diagram of the distribution of the components of the present invention.
The LED lamp comprises a single-color LED lamp bead 1, a lamp shade 2, a lamp shade 3, a light valve array 4, a rear panel 5, optical fibers 6 and a front panel.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention relates to a micro-space LED display screen module based on an RGB split array, which has the main design concept that 3 high-power R, G, B LED single lamps are used as light sources, independent areas of a light valve array are arranged for each LED single lamp, and a light valve is used for adjusting the color of an output pixel. The light valve is used for controlling the light path to be closed and the intensity of passing light, and a liquid crystal light valve or other light valves are used as the light valve. The light valve is not provided with a filter.
The light source is R, G, B high-power monochromatic LED lamp beads 1, and light rays emitted by the light source are projected onto the rear panel 4 after passing through the corresponding light valve array 3. Typically, a lamp housing 2 is provided between the light source and the light valve array 3 to uniformly concentrate the light onto the input surface of the light valve array 3.
The light valve array 3 is provided with a plurality of light valves, light rays pass through each light valve to form a light path, and each light valve can control the output intensity of the light path. The light valve array 3 is divided into three spatially independent regions corresponding to R, G, B single-color LED beads 1, respectively. Each light valve in the light valve array 3 corresponding to the red LED lamp beads outputs red light, each light valve in the light valve array 3 corresponding to the green LED lamp beads outputs green light, and each light valve in the light valve array 3 corresponding to the blue LED lamp beads outputs blue light. The light after passing through the light valve is projected onto the rear panel 4, the light valve adjusts the output intensity of the light path to form monochromatic light with different intensities, then each output pixel point on the front panel 6 is connected with R, G, B sub-pixel points on the rear panel 4 by using an optical fiber bundle formed by three optical fibers 5 to transmit light, and different colors are mixed in pixels on the front panel 6.
The invention also provides a control board, and the control board is used for adjusting the light intensity of the monochromatic LED lamp beads 1 and the opening and closing intensity of each light valve in the light valve array 3.
In the invention, the optical fiber bundles are utilized for conducting light, different partitions on the rear panel correspond to different monochromatic colors, and each pixel point is the monochromatic light. Each optical fiber bundle is provided with 3 optical fibers 5, each optical fiber is respectively communicated with one output light path in the three light valve partitions, the primary colors of three pixels are input into the 3 light paths, and each optical fiber bundle is connected with one output pixel point of the front panel 6 to output different colors. In a specific implementation of the invention, each area of the light valve array 3 comprises M rows by N columns of light valves.
In a specific embodiment of the present invention, the rear panel 4, the optical fiber array formed by the plurality of optical fibers 5, and the front panel 6 are provided, and the three form a light guide member. The front panel 6 is larger in size than the rear panel 4.
The invention installs the single-color LED lamp beads 1, the lamp shade 2 and the light valve array 3 on the light guide component, and the light guide component is provided with an assembling structure for splicing and installing between modules, and the assembling structure adopts the assembling structure of the existing LED screen.
As used herein, static energy efficiency refers to the percentage of output energy (light energy) to input energy (electrical energy or light energy) independent of the displayed image; and the dynamic power consumption is related to the color of the display image, the energy consumption is maximum when the display is full white, the energy consumption is minimum when the display is full black, and the local dimming can reduce the dynamic power consumption. The display screen module can perform R, G, B independent area dimming, and can reduce the dynamic energy consumption of the display screen to 30% of the existing LCD screen. The static energy efficiency is improved by 3 times compared with the prior art.
The cost of one high-power LED in the technical field is far smaller than the sum of the cost of a large number of low-power LEDs with the same total power. If a large number of low-power LEDs are used, the display of the display screen can be adversely affected as long as one of the low-power LEDs fails. According to the invention, three R, G, B LED single lamps are used as light sources, so that the number of LED lamp beads is greatly reduced, the production cost and the production difficulty are reduced, the average failure-free time of the display screen is greatly improved, and the reliability is improved.
The invention uses the LED single lamp with high power R, G, B as the light source of the display screen, and does not need to use a color filter, namely, the light rays are distinguished from the light source in color. The invention sets the light valve array, and the LED single lamp corresponding to three R, G, B is used for partitioning the light valve array, so as to realize the intensity adjustment of each light path in the partition, and the optical fiber bundles containing three optical fibers are used for transmitting the output light of the sub-pixel points in the three partitions to the front panel, so as to realize the image display of the display screen. The light valve can control the output intensity of the sub-light path to realize the color adjustment. The invention can greatly reduce the manufacturing cost of the micro-space LED display screen, improve the average fault-free time and improve the reliability; meanwhile, the energy efficiency is 3 times of that of the liquid crystal screen, and the energy is more energy-saving.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A micro-spacing LED display screen module based on RGB split array is characterized in that: the light source is R, G, B high-power monochromatic LED lamp beads (1), and light rays emitted by the light source are projected onto the rear panel (4) after passing through the corresponding light valve array (3); the light valve array (3) can control the output intensity of the light path, and the light valve array (3) is divided into three spatially independent areas which respectively correspond to R, G, B single-color LED lamp beads (1); each output pixel point on the front panel (6) is connected with R, G, B sub-pixel points on the rear panel (4) by using an optical fiber bundle formed by three optical fibers (5) to transmit light; the control panel is used for controlling the monochromatic LED lamp beads (1) and the light valve array (3); a lampshade (2) which can uniformly gather light to the input surface of the light valve array (3) is arranged between the light source and the light valve array (3); each optical fiber bundle is provided with 3 optical fibers (5), each optical fiber (5) is respectively communicated with one output light path in the three light valve partitions, and after the 3 light paths are converged, each optical fiber bundle is connected with one output pixel point of the front panel; the method is characterized in that: the rear panel (4), the optical fiber (5) and the front panel (6) are light guide components; the front panel (6) is larger in size than the rear panel (4).
2. The micro-pitch LED display screen module based on the RGB split array of claim 1, wherein: each area of the light valve array (3) comprises M rows by N columns of light valves; the light valve is not provided with a color filter.
3. The micro-pitch LED display screen module based on the RGB split array of claim 1, wherein: the single-color LED lamp bead (1), the lamp shade (2) and the light valve array (3) are all installed on the light guide component, and an assembling structure for splicing and installing between modules is arranged on the light guide component.
4. A micro-pitch LED display module based on an RGB split array according to any one of claims 1 to 3, wherein: the light valve is a liquid crystal light valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111403109.6A CN114283702B (en) | 2021-11-24 | 2021-11-24 | Micro-spacing LED display screen module based on RGB split array |
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| CN202111403109.6A CN114283702B (en) | 2021-11-24 | 2021-11-24 | Micro-spacing LED display screen module based on RGB split array |
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| CN114283702A CN114283702A (en) | 2022-04-05 |
| CN114283702B true CN114283702B (en) | 2024-06-25 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840138A (en) * | 2010-03-30 | 2010-09-22 | 广东威创视讯科技股份有限公司 | Spliced projection display device |
| CN108447407A (en) * | 2018-02-09 | 2018-08-24 | 武汉华星光电技术有限公司 | A microcrystalline light-emitting diode display panel |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102063844B (en) * | 2010-09-26 | 2013-05-29 | 张秋霞 | Stacked LED optical fiber display device |
| CN104637414B (en) * | 2015-03-05 | 2017-08-11 | 矽照光电（厦门）有限公司 | A kind of light-emitting diode display |
| CN205750121U (en) * | 2016-05-12 | 2016-11-30 | 泉州市泉港区正凯装潢设计有限公司 | Use the high brightness of array of source illumination, high uniformity image display |
| CA3060437C (en) * | 2017-05-14 | 2021-12-21 | Leia Inc. | Multiview backlight, display, and method employing active emitters |
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2021
- 2021-11-24 CN CN202111403109.6A patent/CN114283702B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840138A (en) * | 2010-03-30 | 2010-09-22 | 广东威创视讯科技股份有限公司 | Spliced projection display device |
| CN108447407A (en) * | 2018-02-09 | 2018-08-24 | 武汉华星光电技术有限公司 | A microcrystalline light-emitting diode display panel |
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