CN114333613A - Micro-interval LED display screen module based on field sequence color technology - Google Patents
Micro-interval LED display screen module based on field sequence color technology Download PDFInfo
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Abstract
The invention relates to a micro-space LED display screen module based on a field sequential color technology, and belongs to the technical field of LED display screens. The light source is an RGB high-power LED lamp bead, and R, G, B can be controlled to be switched on and off and to have brightness independently; the light valve array is correspondingly arranged, and the output intensity of the light path can be controlled; the light irradiates the rear panel to form a plurality of pixel points after passing through the light valve array, and each pixel point on the rear panel is connected with the pixel point on the front panel by using an optical fiber to transmit light; the control circuit circularly lights R, G, B lamp wicks of the LEDs and controls the corresponding opening and closing degree of the light valve; the field frequency is more than or equal to 24 multiplied by 3 Hz; a lampshade is arranged between the light source and the light valve array, and the lampshade enables the light to be uniformly gathered on the input surface of the light valve array. The invention uses one RGB high-power LED lamp bead as a light source, the control circuit can circularly lighten R, G, B lamp wicks of the LED, the light can be independently adjusted, the dynamic energy consumption is low, and the structure is simple.
Description
Technical Field
The invention relates to a micro-space LED display screen module based on a field sequential color technology, and belongs to the technical field of LED display screens.
Background
The current display technologies are mainly LED screens, OLED screens, LCD screens, projection screens (DLP, LCD, etc.).
The projection screen (or the projection splicing 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 the manufacturing cost per unit area rises sharply with the increase of the size of a single screen, and is only suitable for medium and small screens. The LCD screen is spliced into a large screen, because the LCD screen takes glass as a carrier and a TFT (thin film transistor) manufacturing process is adopted, a display area is required to be smaller than a glass carrier, and a required structural outer frame cannot be visually spliced seamlessly. Moreover, the LCD screen adopts a color filter film, so that the effective utilization rate of light is low and the energy efficiency is low.
The OLED screen is actively luminous, the effective utilization rate of light is high, the substrate can be made of flexible materials, but the OLED screen is also based on a TFT (thin film transistor) process and is only suitable for medium and small screens.
The LED screen is formed by assembling a large number of LED lamp beads with low power on a PCB in an array form to form a module, and then splicing the module into a large screen, so that the seamless splicing on the vision is realized. As the pixel pitch continues to shrink below 2mm, the size limitation of the LED bead package housing becomes a bottleneck in the conventional single lamp assembly manufacturing process. The device usage per unit area is proportional to the square of the reciprocal pixel pitch, and millions of devices per square meter degrade many performance indicators quickly. The method comprises the following steps: 1. the manufacturing scale is increased sharply, and the production line investment is increased sharply; 2. the mean time without failure is sharply reduced, and the reliability is seriously deteriorated; 3. the smaller the LED is, the poorer the protection capability of the LED and the shell of the module is, the more easily the LED is damaged, and the manufacturing, transporting, installing and maintaining cost is greatly increased; 4. the LED module is adopted and is lighted the scanning drive line by line, utilizes the persistence of vision principle to show stable image, and along with the increase of LED's density, the PCB area that corresponds reduces, if drive circuit equal proportion increases, then PCB is difficult to hold, so adopt higher frequency scanning to reduce drive circuit's quantity, but brought bigger electromagnetic radiation, the electromagnetic pollution aggravates.
The new technical routes of the LED mainly include COB, MiniLED and MicroLED at present.
COB (chip On Board), namely packaging a plurality of LED bare chips On a substrate, then packaging into a device, and assembling a display screen by using the COB device to reduce the manufacturing scale of the assembling link. However, other defects of the traditional small-spacing LED screen cannot be solved, and the defects of surface reflection, poor bottom color consistency, reduced contrast, difficulty in single-point repair and the like are newly generated. Furthermore, a bottleneck is present even when the pixel pitch is 1mm or less.
The MiniLED is formed by arranging LED chips at a smaller interval (50 um-200 um) on a glass substrate in an array manner, is attached to the back of glass of an LCD display screen and serves as a backlight source, so that regional dimming can be realized, the backlight of the LCD is more uniform, and the dynamic energy consumption of the LCD screen can be reduced. At present, the method is not applied to the field of LED large screen display.
The micro LED is an LED chip smaller than 50um, and is one of the current research hotspots, but the necessary technologies such as huge transfer and the like are not broken through. The micro LED can be used for manufacturing small and medium-sized display screens, and a plurality of problems exist in manufacturing large-screen display screens.
Disclosure of Invention
The invention aims to provide a micro-space LED display screen module based on a field sequential color technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
a field sequential color technology-based micro-space LED display screen module is characterized in that a light source is an RGB high-power LED lamp bead, and an R, G, B lamp core can be independently controlled to be switched on and switched off and to have brightness; the light valve array is correspondingly arranged, and the output intensity of the light path can be controlled; the light irradiates the rear panel to form a plurality of pixel points after passing through the light valve array, and each pixel point on the rear panel is connected with the pixel point on the front panel by using an optical fiber to transmit light; the control circuit circularly lights R, G, B lamp wicks of the LEDs and controls the corresponding opening and closing degree of the light valve; the field frequency is more than or equal to 24 multiplied by 3 Hz; a lampshade is arranged between the light source and the light valve array, and the lampshade enables the light to be uniformly gathered on the input surface of the light valve array.
The technical scheme of the invention is further improved as follows: the light valve array is provided with M rows and N columns of light valves and divides input light into M rows and N columns of output light paths.
The technical scheme of the invention is further improved as follows: the rear panel, the optical fiber array and the front panel are projection components, and the size of the front panel is larger than that of the rear panel.
The technical scheme of the invention is further improved as follows: LED lamp pearl, lamp shade, light valve array all install on the projection part, have the structure of assembling that is used for the concatenation installation between the module on the projection part.
The technical scheme of the invention is further improved as follows: the light valve uses a liquid crystal light valve.
Due to the adoption of the technical scheme, the invention has the following technical effects:
by using the high-power R, G, B LED single lamp, the invention can greatly reduce the using amount of the LED lamp beads and the driving circuit, and the reduction range reaches several orders of magnitude, thereby reducing the manufacturing scale, reducing the production line investment and improving the production efficiency. Due to the fact that the number of the light sources is greatly reduced, the probability of failure of the display screen is remarkably reduced, the mean time without failure is prolonged, and reliability is improved.
The invention uses one RGB high-power LED lamp bead as a light source, the control circuit can circularly lighten R, G, B lamp wicks of the LED, the light can be independently adjusted, and the dynamic energy consumption is low.
The invention sets the light valve array, controls the light path by the light valve array without controlling large current, reduces electromagnetic radiation and is more environment-friendly.
The number of the light source LEDs is reduced, so that the size of an electrical part can be reduced, the electrical part 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 valve array output light is projected onto the front panel of the display screen by the optical fiber of the light guide rear panel, so that the pixel spacing is enlarged, the structural strength is increased, and the collision damage resistance is enhanced. The display screen module can prevent dust, water, condensation and salt mist corrosion.
Drawings
FIG. 1 is a schematic view of the component distribution of the present invention;
the LED lamp comprises a lamp body, a lamp bulb 1, an LED lamp bead 2, a lampshade 3, a light valve array 4, a rear panel 5, an optical fiber 6 and a front panel.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention relates to a micro-space LED display screen module based on a field sequential color technology, which is a unit for forming a display screen. The main design idea of the display screen module is that one RGB high-power LED lamp bead 1 is used as a light source, R, G, B can independently control the switch and the brightness, and the LED display screen module emits red light, green light and blue light, and the brightness can be adjusted. The intensity of the output light path is controlled by a light valve. The light valve is used for controlling the opening and closing of the light path and the intensity of light passing through the light path, and the light valve is a liquid crystal light valve or other types of light valves.
As shown in FIG. 1, the display screen module is provided with an RGB high-power LED lamp bead 1 as a light source, and R, G, B can control the switch and the brightness independently to adjust the color. The light valve array 3 is arranged corresponding to the light source, the lampshade 2 which enables light rays to be uniformly gathered on the input surface of the light valve array is arranged between the light source and the light valve array 3, and light emitted by the light source is uniformly irradiated on the light valve array 3 after passing through the lampshade 2. The light passes through the light valve array 3 to control the output intensity of the light path, and then irradiates the rear panel to form a plurality of pixel points. Each pixel point on the back panel 4 is connected with the pixel point on the front panel by using an optical fiber 5 to transmit light, and different colors are presented on the front panel 6. In a specific implementation, the front panel 6 is larger in size than the back panel 4.
The invention is provided with the control panel with the control circuit, the control circuit can circularly lighten R, G, B lamp wicks of the LEDs, and meanwhile, the control panel is used for controlling the corresponding opening and closing degree of the light valve. The control circuit controls R, G, B the field frequency of the lamp wick to be equal to or more than 24X 3 Hz. The control circuit sequentially controls R, G, B lampwicks to light, when the field frequency is larger than or equal to 24 multiplied by 3Hz, the effect of persistence of vision can be achieved, R, G, B three monochromatic lights are overlapped in time (different from spatial monochromatic light overlapping), and color is generated. The invention can generate color by overlapping R, G, B frames on time by controlling the lighting time of R, G, B lampwicks of the light source, has simple structure, does not need precise grating lens, does not need to enlarge the scale of a light valve and the scale of an optical fiber, does not need a color filter, and has high energy efficiency.
In a specific implementation of the present invention, the light valve array 3 has M rows × N columns of light valves, the light valve array 3 divides the input light into M rows × N columns of output light paths, and each light valve has no sub-light valves and no color filter. Each light valve controls the output intensity of the light path to realize the adjustment of output color.
In a specific embodiment of the invention, the rear panel 4, the fiber array formed by the plurality of fibers 5 and the front panel 6 are referred to as a projection unit. The light on the rear panel 4 is transmitted to the front panel 6 through the optical fiber array, so that the external output display is realized.
According to the LED display screen module, the LED lamp beads 1, the lampshade 2 and the light valve array 3 are all arranged on the projection component, and the projection component is provided with an assembling structure for assembling and installing the modules, so that a whole large screen is formed by assembling. The assembling structure can adopt the assembling structure of the existing LED screen.
Static energy efficiency, as used herein, refers to the percentage of output energy (light energy) to input energy (electrical or light energy), independent of the displayed image; the dynamic power consumption is related to the color of the displayed image, the energy consumption is the largest when the image is displayed in full white, the energy consumption is the smallest when the image is displayed in full black, and the dynamic power consumption can be reduced by regional dimming. The display screen module can carry out R, G, B independent area dimming, and can reduce the dynamic energy consumption of the display screen to 30% of the existing LCD screen. Compared with the prior art, the static energy efficiency is improved by 3 times.
The cost of one high-power LED in the technical field is far less 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 effect of the display screen is adversely affected if only one of the low-power LEDs fails. The invention adopts one RGB high-power LED lamp bead as the light source, greatly reduces the quantity of the LED lamp beads, not only reduces the production cost and the production difficulty, but also can greatly improve the mean time between failures and improve the reliability.
The invention utilizes one RGB high-power LED lamp bead as the light source of the display screen, does not need to use a color filter, and realizes stable color mixing by circularly lightening R, G, B lamp wicks of the high-power LED lamp bead when the field frequency is more than or equal to 24 multiplied by 3 Hz. The invention is provided with the light valve array to realize the intensity adjustment of the light path, and the output light path is transmitted to the front panel by using the optical fiber to realize the image display of the display screen. The invention can greatly reduce the manufacturing cost of the LED display screen with the micro spacing, improve the mean time between failures and improve the reliability; meanwhile, the energy efficiency is 3 times that of the LCD screen, and the energy-saving effect is better.
The foregoing shows and describes the general principles, essential 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, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a fine interval LED display screen module based on colored technique of field sequence which characterized in that: the light source is an RGB high-power LED lamp bead (1), and the R, G, B lamp core can be independently controlled to be switched on and switched off and to be in brightness; the light valve array (3) is correspondingly arranged and can control the output intensity of the light path; the light irradiates the rear panel (4) after passing through the light valve array (3) to form a plurality of pixel points, and each pixel point on the rear panel (4) is connected with the pixel point on the front panel (6) by using an optical fiber (5) to transmit light; the control circuit circularly lights R, G, B lamp wicks of the LEDs and controls the corresponding opening and closing degree of the light valve; the field frequency is more than or equal to 24 multiplied by 3 Hz; a lampshade (2) which enables the light to be uniformly gathered on the input surface of the light valve array (3) is arranged between the light source and the light valve array (3).
2. The fine pitch LED display screen module according to claim 1, wherein: the light valve array (3) is provided with M rows multiplied by N columns of light valves and divides input light into M rows multiplied by N columns of output light paths; the light valve is not provided with a color filter.
3. The fine pitch LED display screen module according to claim 2, wherein: the rear panel (4), the optical fiber (5) and the front panel (6) are projection components, and the size of the front panel (6) is larger than that of the rear panel (4).
4. The fine pitch LED display screen module based on the field sequential color technology as claimed in claim 3, wherein: LED lamp pearl (1), lamp shade (2), light valve array (3) all install on the projection part, have the structure of assembling that is used for the concatenation installation between the module on the projection part.
5. The micro-spacing LED display screen module based on the field sequential color technology as claimed in any one of claims 1 to 4, wherein: the light valve uses a liquid crystal light valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111403217.3A CN114333613B (en) | 2021-11-24 | 2021-11-24 | Micro-spacing LED display screen module based on field sequential color technology |
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| CN202111403217.3A CN114333613B (en) | 2021-11-24 | 2021-11-24 | Micro-spacing LED display screen module based on field sequential color technology |
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| CN114333613B CN114333613B (en) | 2024-04-02 |
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| US6595648B1 (en) * | 1998-06-03 | 2003-07-22 | Sharp Kabushiki Kaisha | Projection display |
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| US20050286123A1 (en) * | 2003-06-10 | 2005-12-29 | Abu-Ageel Nayef M | Compact projection system including a light guide array |
| US7252394B1 (en) * | 2003-07-03 | 2007-08-07 | Advanced Numicro Systems, Inc. | Laser projection display and illumination device with MEMS scanning mirror for indoor and outdoor applications |
| CN101086608A (en) * | 2006-06-05 | 2007-12-12 | 中国科学院物理研究所 | Projection display device |
| CN101750854A (en) * | 2008-12-03 | 2010-06-23 | 北京中视中科光电技术有限公司 | Optical-fiber laser wide projection device |
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| CN105334687A (en) * | 2014-08-01 | 2016-02-17 | 欧司朗股份有限公司 | Projection system |
| CN209805986U (en) * | 2019-07-22 | 2019-12-17 | 东莞广辰光电科技有限公司 | Projection structure with uniform brightness |
-
2021
- 2021-11-24 CN CN202111403217.3A patent/CN114333613B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2121704U (en) * | 1992-04-14 | 1992-11-11 | 张云祥 | Optical fibre enlarging show screen |
| JPH0584931U (en) * | 1992-04-16 | 1993-11-16 | 日本ビクター株式会社 | LCD projector device |
| WO1999038046A1 (en) * | 1998-01-23 | 1999-07-29 | Burger Robert J | Lenslet array systems and methods |
| US6595648B1 (en) * | 1998-06-03 | 2003-07-22 | Sharp Kabushiki Kaisha | Projection display |
| JP2002372701A (en) * | 2001-06-13 | 2002-12-26 | Ricoh Co Ltd | Picture display device |
| US20050286123A1 (en) * | 2003-06-10 | 2005-12-29 | Abu-Ageel Nayef M | Compact projection system including a light guide array |
| US7252394B1 (en) * | 2003-07-03 | 2007-08-07 | Advanced Numicro Systems, Inc. | Laser projection display and illumination device with MEMS scanning mirror for indoor and outdoor applications |
| CN1645250A (en) * | 2004-12-07 | 2005-07-27 | 成都泰阳视讯技术有限公司 | Single-chip microdisplay projecting optical engine and projector of time division three-color LED light |
| CN101086608A (en) * | 2006-06-05 | 2007-12-12 | 中国科学院物理研究所 | Projection display device |
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| CN114333613B (en) | 2024-04-02 |
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