CN103927944A - Light emitting diode (LED) display screen - Google Patents
Light emitting diode (LED) display screen Download PDFInfo
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- CN103927944A CN103927944A CN201310015931.4A CN201310015931A CN103927944A CN 103927944 A CN103927944 A CN 103927944A CN 201310015931 A CN201310015931 A CN 201310015931A CN 103927944 A CN103927944 A CN 103927944A
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Abstract
A light emitting diode (LED) display screen comprises a circuit base board, and a plurality of luminous units and a light mixing device which are connected onto the circuit base board, wherein the light mixing device is installed on the circuit base board in detachable mode, the luminous units are located between the circuit base board and the light mixing device, and the light mixing device refracts light rays sent out from the luminous units. According to the LED display screen, after the light rays sent out from the luminous units are refracted by the light mixing device, light emitting angles of the light rays, which are formed on the surface of the light mixing device, are increased, light intensity of central areas of the luminous units are weakened, and light intensity of marginal areas of the luminous units are relatively intensified. Accordingly, luminance uniformity of a frame of the LED display screen is improved, granular sensation and dazzling sensation of the frame displayed by the LED display screen are reduced, and therefore good display effects are obtained. Additionally, compared with an existing method for improving the display effects by increasing the density of the luminous units, needed display effects of the LED display screen can be achieved without need of improving circuit board configuration difficulty or increasing the quantity of the luminous units, and preparation cost of the LED display screen is reduced.
Description
Technical field
The present invention relates to display screen, relate in particular to the lower and good LED(Light Emitting of the picture display effect Diode of a kind of cost, light emitting diode) display screen.
Background technology
LED display is just being subject to paying attention to widely being developed rapidly because of features such as its brightness is high, low in energy consumption, stable performances, and these LED display are applied in daily life more and more, for example, be arranged at the electronic display in the places such as Entertainment Plaza, commercial street, hospital, railway station.LED display is made up of LED lamp and printed circuit board (PCB) (PCB), by controlling the display mode of LED lamp, utilizes the content such as light on and off display text, picture, animation, video of one or more LED lamps in the color such as red, blue, green.That is to say, LED display is mostly to realize dynamic demonstration by multiple LED light source arrays, and each LED light source array is equivalent to a pixel cell of display.
The size of the luminescence unit in LED light source array is less than or equal to the half of adjacent luminescence unit spacing conventionally at present, and the region between adjacent two luminescence units is more than or equal to the size of luminescence unit self conventionally.Therefore, in the time that this LED display is lighted, tend to present luminescence unit zone line brighter, its fringe region is darker, even outside light-emitting zone, has the feature of non-luminous dark space.This luminescence feature can cause the picture brightness of LED display inhomogeneous, and picture display effect is poor.In addition, because light-emitting zone often concentrates near the central point of described luminescence unit, easily produce dazzle, when user watches, can produce dazzling sense.If adopt the method for conventional increase luminescence unit density, can increase the difficulty that printed circuit board (PCB) is arranged and LED light source dispels the heat, can increase preparation cost simultaneously.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide the lower and good LED display of picture display effect of a kind of preparation cost.
In order to solve the problems of the technologies described above, the invention provides a kind of LED display, it comprises circuit substrate, is connected in some luminescence units and light mixing device on this circuit substrate; This light mixing device is removably installed in described circuit substrate, and described luminescence unit is between this circuit substrate and light mixing device, and this light mixing device reflects the light that described luminescence unit sends.
Wherein, described light mixing device comprises lower surface, upper surface and is opened in some accommodating cavities of this lower surface, this lower surface and described upper surface are the smooth flat being parallel to each other, described accommodating cavity is the arrangement position corresponding to described luminescence unit at the arrangement position of lower surface, and described luminescence unit is placed in corresponding accommodating cavity.
Wherein, the surface of described accommodating cavity is spherical, and described luminescence unit is placed in corresponding accommodating cavity, after the spherical and upper surface refraction of the light that described luminescence unit sends through described accommodating cavity, penetrates at this upper surface.
Wherein, on described circuit substrate, offer two draw-in grooves that are parallel to each other, described light mixing device also comprises two buckles, this buckle buckle is arranged at described lower surface in parallel to each other, and corresponding with the position of described draw-in groove, this buckle is placed in corresponding draw-in groove, so that described light mixing device is installed on described circuit substrate.
Wherein, described light mixing device comprises lower surface and upper surface, between this lower surface and described upper surface, is parallel to each other, and described lower surface is to process through frosted the frosting forming.
Wherein, the lower surface of described light mixing device is offered some accommodating cavities, described accommodating cavity is the arrangement position corresponding to described luminescence unit at the arrangement position of lower surface, described luminescence unit is placed in corresponding accommodating cavity, after the frosting and upper surface refraction of the light that this luminescence unit sends through described accommodating cavity, penetrate at this upper surface.
Wherein, described light mixing device is made up of transparent plastic.
Wherein, described light mixing device is made up of polycarbonate or polymethylmethacrylate.
Wherein, described luminescence unit is monochromatic LED module, comprise monochromatic LED, each monochromatic LED is as a pixel, described monochromatic LED is arranged and is formed monochromatic LED array, this monochromatic LED array is arranged on described circuit substrate, and is electrically connected with this circuit substrate, and described light mixing device covers on this monochromatic LED array.
Wherein, described LED display is full-color LED display screen, comprise the three-color LED array that is arranged on described circuit substrate and is electrically connected with this circuit substrate, described light mixing device covers on this all-colour LED array, described three-color LED array comprises some luminous group, each luminous group as a pixel, and send the light of different colours, described luminous group comprises emitting red light unit, green emitting unit and blue-light-emitting unit, this emitting red light unit, green emitting unit and blue-light-emitting unit are fixed on described circuit substrate, and be electrically connected with this circuit substrate.
In LED display provided by the present invention, described luminescence unit is installed on described circuit substrate, and described light mixing device is removably installed on this circuit substrate, and described luminescence unit is between described circuit substrate and light mixing device; The light that this luminescence unit sends is after the refraction of described light mixing device, and described light increases at the rising angle of the surface of light mixing device, and the light intensity of the central area of this luminescence unit is died down, and the light intensity of its fringe region is strengthened relatively.So, the brightness uniformity of this LED display picture increases, and shown picture particle sense and dazzling sense reduction, thereby obtains good display effect.In addition, with respect to the existing method of passing through to increase luminescence unit density, this LED display is arranged seldom without increasing circuit plate, also can reach required display effect without the quantity that increases luminescence unit, has reduced preparation cost.
Brief description of the drawings
In order to be illustrated more clearly in technical scheme of the present invention, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the decomposition texture schematic diagram of the LED display that provides of first embodiment of the invention.
Fig. 2 is the cut-open view after the LED display assembling shown in Fig. 1 of the present invention.
Fig. 3 is the LED display that provides of first embodiment of the invention and the distribution curve flux schematic diagram of existing LED display.
Fig. 4 is the LED display that provides of first embodiment of the invention and the hot spot effect schematic diagram of existing LED display.
Fig. 5 is the decomposition texture schematic diagram of the LED display that provides of second embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 and Fig. 2, first embodiment of the invention provides a kind of LED(Light-Emitting Diode, light emitting diode) display screen 100, it is used for the display screen of the various information such as display text, image, animation, video, video signal, has the features such as brightness is high, operating voltage is low, power consumption is little, stable performance.In embodiment in the present invention, described LED display 100 is a monochromatic LED display screen, the monochromatic LED array 20 that it comprises circuit substrate 10, be arranged on this circuit substrate 10 and be electrically connected with this circuit substrate 10 and be removable installed in the light mixing device 30 on this circuit substrate 10.This monochromatic LED array 20 is arranged on described circuit substrate 10 by the mode of welding, described circuit substrate 10 provides electric energy support for this monochromatic LED array 20, this light mixing device 30 is removably installed on described circuit substrate 10, and covers on described monochromatic LED array 20.
In embodiments of the present invention, described circuit substrate 10 can be integrated and be formed by printed circuit board (PCB) (printed circuit board, PCB), and its supporter that is electronic devices and components is the supplier of each electronic devices and components electrical connection.These circuit substrate 10 entirety are roughly rectangular-shaped, offer two draw-in grooves that are parallel to each other 12 on it.In other embodiments of the invention, described draw-in groove 12 is opened in respectively this circuit substrate 10 surfaces edge of both sides relatively, and one end of this draw-in groove 12 extends to the edge of these circuit substrate 10 both sides, and forms opening 14 in this edge respectively.
Described monochromatic LED array 20 comprises some luminescence units 22, and in embodiments of the present invention, the mode that these some luminescence units 22 are arranged according to matrix is welded on described circuit substrate 10, and each luminescence unit 22 all can be used as a pixel.Described luminescence unit 22 is fixed on described circuit substrate 10 by the mode of welding, and is electrically connected with this circuit substrate 10.Described luminescence unit 22 can convert electrical energy into luminous energy, and can send a kind of light of color, as, red, green or blue.In embodiments of the present invention, described luminescence unit 22 is monochromatic LED module, and it comprises a monochromatic LED, and each monochromatic LED is as a pixel.This luminescence unit 22 can send a kind of light of color, as the light taking Shan Hong look as primary colours, for display text or simple pattern.
These light mixing device 30 entirety are roughly rectangular tabular, and it can be made up of transparent plastics such as polycarbonate (polycarbonate, PC), polymethylmethacrylates (polymethylmethacrylate, PMMA).Described light mixing device 30 comprises lower surface 31 and upper surface 32, and this lower surface 31 is all roughly rectangular with described upper surface 32, and the two is the plane being parallel to each other.This light mixing device 30 also comprises two buckles 34, and this buckle 34 is arranged at the edge of described lower surface 31 in parallel to each other, and corresponding with the position of described draw-in groove 12.The shape of this buckle 34 and size match with shape and the size of described draw-in groove 12, because this buckle 34 has good ductility, this buckle 34 can directly be placed in corresponding draw-in groove 12 by the mode of engagement connection, so that this light mixing device 30 is installed on described circuit substrate 10.
The lower surface 31 of described light mixing device 30 is offered some accommodating cavities 35, in embodiments of the present invention, and roughly spherical in shape, the surface of this accommodating cavity 35.The mode that this accommodating cavity 35 is arranged according to matrix is distributed in the lower surface 31 of this light mixing device 30, and corresponding with the distributing position of above-mentioned luminescence unit 22.The size of the size of this accommodating cavity 35 and above-mentioned luminescence unit 22 matches, when described buckle 34 is placed in described draw-in groove 12 when interior by the mode of engaging, described luminescence unit 22 is placed in corresponding accommodating cavity 35, make described luminescence unit 22 and external environment isolation, to prevent the extraneous foreign material such as dust, steam contact, to pollute this luminescence unit 22.
Refer to Fig. 3 and Fig. 4, Fig. 3 is the LED display that provides of first embodiment of the invention and the distribution curve flux schematic diagram of existing LED display, wherein, the distribution curve flux schematic diagram that curve 10a is existing LED display, curve 10b is the distribution curve flux schematic diagram of the LED display in the present embodiment.After light the process spherical and upper surface 32 twice refraction of described accommodating cavity 35 that described luminescence unit 22 sends, the light of this luminescence unit 22 dies down in the light intensity of the bright dipping center at upper surface 32 places angle, and the light intensity of edge is strengthened relatively.Fig. 4 is the LED display that provides of first embodiment of the invention and the hot spot effect schematic diagram of existing LED display, wherein, 10a in Fig. 4 is the hot spot effect schematic diagram of existing LED display, and the 10b in Fig. 4 is the hot spot effect schematic diagram of the LED display in the present embodiment.Obviously, the light of this luminescence unit 22 increases at the rising angle at upper surface 32 places, and the brightness uniformity of hot spot increases, and the picture particle sense of described LED display 100 and dazzling sense reduce.
See also Fig. 5, second embodiment of the invention provides a kind of LED display 400, it has the features such as brightness is high, operating voltage is low, power consumption is little, stable performance for the display screen of the various information such as display text, image, animation, video, video signal.In embodiments of the present invention, described LED display 400 is a kind of full-color LED display screen, the three-color LED array 420 that it comprises circuit substrate 410, be arranged on this circuit substrate 410 and be electrically connected with this circuit substrate 410 and be removable installed in the light mixing device 430 on this circuit substrate 410.Described three-color LED array 420 can be arranged on described circuit substrate 410 by the mode of welding, described circuit substrate 410 provides electric energy support for this three-color LED array 420, this light mixing device 430 is removably installed on described circuit substrate 410, and covers on described three-color LED array 420.
Described three-color LED array 420 comprises some luminous group, and in embodiments of the present invention, these some luminous group of modes of arranging according to matrix are welded on described circuit substrate 410.Each luminous group all can be used as a pixel, and it can send the light of different colours.In embodiments of the present invention, described luminous group is three-color LED module, and its mode by welding is fixed on described circuit substrate 410, and is electrically connected with this circuit substrate 410.Described luminous group converts electrical energy into luminous energy, and can send the light of different colours, as, the light of redness, green, blueness or other colors.
In embodiments of the present invention, described circuit substrate 410 offers the draw-in groove 412 being parallel to each other, and the 26S Proteasome Structure and Function of this circuit substrate 410 is identical with the 26S Proteasome Structure and Function of the circuit substrate 10 described in the first embodiment, does not repeat them here.
In embodiments of the present invention, described luminous group comprises emitting red light unit 421, green emitting unit 422 and blue-light-emitting unit 423, this emitting red light unit 421, green emitting unit 422 and blue-light-emitting unit 423 can be fixed on described circuit substrate 410 by the mode of welding, and be electrically connected with this circuit substrate 410, described light mixing device covers on this emitting red light unit 421, green emitting unit 422 and blue-light-emitting unit 423.This emitting red light unit 421, green emitting unit 422 and blue-light-emitting unit 423 can send respectively redness, green and blue light, by controlling variation and the light stack each other of three Color Channels of red, green, blue, the light of three kinds of colors is mixed according to different ratios, thereby this luminous group can be sent the light of different colours as required.
Described light mixing device 430 entirety are roughly rectangular-shaped, and it can be made up of the transparent material such as PC, PMMA.This light mixing device 430 comprises lower surface 431 and upper surface 432, and this lower surface 431 is all roughly rectangular with described upper surface 432, and the two is the plane being parallel to each other.This light mixing device 430 also comprises two buckles 434, and this buckle 434 is arranged at the edge of described lower surface 431, and corresponding with the position of described draw-in groove 412.The shape of this buckle 434 and size match with shape and the size of described draw-in groove 412, and this buckle 434 can be placed in corresponding draw-in groove 412 by the mode of engaging, so that this light mixing device 430 is installed on described circuit substrate 410.
The lower surface 431 of described light mixing device 430 is offered some accommodating cavity groups, and in embodiments of the present invention, the mode that this accommodating cavity group is arranged according to matrix is distributed in the lower surface 431 of this light mixing device 430, and corresponding with the distributing position of above-mentioned luminous group.This accommodating cavity group comprises three accommodating cavities 435, and the position of this accommodating cavity 435 and size are corresponding with position and the size of described emitting red light unit 421, green emitting unit 422 and blue-light-emitting unit 423 respectively.When described buckle 435 is placed in described draw-in groove 412 when interior by the mode of engaging, described emitting red light unit 421, green emitting unit 422 and blue-light-emitting unit 423 are placed in respectively in corresponding accommodating cavity 435, make described luminous group to isolate with external environment, to prevent the extraneous foreign material such as dust, steam contact, to pollute this luminescence unit.In addition, the light that described luminescence unit sends is through after the spherical and upper surface 432 twice refraction of described accommodating cavity 435, this light is increased at the rising angle at upper surface 432 places, and the light intensity of this luminescence unit center dies down, the light intensity of edge is strengthened relatively, increase the effect that granular sensation and dazzling sense reduce thereby reach this LED display picture brightness uniformity.
In addition, by changing number and the color of the luminescence unit in described luminous group, and accordingly by changing the number of the accommodating cavity of accommodating cavity group in described light mixing device, can also form dual-colored LED display screen, not repeat them here.
Refer to Fig. 1 to Fig. 4, while assembling this LED display, this sentences monochromatic LED display screen is that example is illustrated, the mode that described some luminescence units 22 are arranged according to matrix is welded on described circuit substrate 10, and be electrically connected with this circuit substrate 10, and each luminescence unit 22 all can be used as a pixel.The accommodating cavity of described light mixing device 30 35 is aimed to the luminescence unit 22 of arranging on described circuit substrate 10, described buckle 34 is aimed to the draw-in groove 12 on described circuit substrate 10, because this buckle 34 has good ductility, there is elastic deformation and then be placed in described draw-in groove 12 by the mode of engagement connection in this buckle 34.Now, described luminescence unit 22 is placed in corresponding accommodating cavity 35, make described luminescence unit 22 and external environment isolation, to prevent the extraneous foreign material such as dust, steam contact, to pollute this luminescence unit 22, so this light mixing device 30 can be assembled on described circuit substrate 10.
When use, when described monochromatic LED array 20 is lighted, after the refraction of the light that described luminescence unit 22 sends through described accommodating cavity 35 and upper surface 32, described light is increased at the rising angle at these upper surface 32 places, and the light intensity of these luminescence unit 22 central areas dies down, the light intensity of fringe region is strengthened relatively, thereby increase the brightness uniformity of these LED display 100 pictures, reduce the generation of dazzle, picture particle sense and the dazzling sense of described LED display 100 are reduced, to obtain good display effect.
Be appreciated that, in the above-described embodiments, the lower surface of described light mixing device can carry out frosted processing, changes frosting design into by smooth flat design, after the frosting and upper surface refraction of the light that this luminescence unit sends through described accommodating cavity, penetrate at this upper surface.So can reduce the total reflection to described luminescence unit emitted light, can increase the diffusion effect of this light simultaneously, thereby further increase the homogeneity of the picture brightness of described LED display, and further reduce picture particle sense and the dazzling sense of this LED display, to reach good display effect.
In LED display provided by the present invention, described luminescence unit is installed on described circuit substrate, and described light mixing device is removably installed on this circuit substrate, and described luminescence unit is between described circuit substrate and light mixing device; The light that this luminescence unit sends is after the refraction of described light mixing device, and described light increases at the rising angle of the surface of light mixing device, and the light intensity of the central area of this luminescence unit is died down, and the light intensity of its fringe region is strengthened relatively.So, the brightness uniformity of this LED display picture increases, and shown picture particle sense and dazzling sense reduction, thereby obtains good display effect.In addition, with respect to the existing method of passing through to increase luminescence unit density, this LED display is arranged seldom without increasing circuit plate, also can reach required display effect without the quantity that increases luminescence unit, has reduced preparation cost.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a LED display, it comprises circuit substrate and is connected in the some luminescence units on this circuit substrate, it is characterized in that, described LED display also comprises light mixing device, this light mixing device is removably installed in described circuit substrate, described luminescence unit is between this circuit substrate and light mixing device, and this light mixing device reflects the light that described luminescence unit sends.
2. LED display according to claim 1, it is characterized in that, described light mixing device comprises lower surface, upper surface and is opened in some accommodating cavities of this lower surface, this lower surface and described upper surface are the smooth flat being parallel to each other, described accommodating cavity is the arrangement position corresponding to described luminescence unit at the arrangement position of lower surface, and described luminescence unit is placed in corresponding accommodating cavity.
3. LED display according to claim 2, it is characterized in that, the surface of described accommodating cavity is spherical, and described luminescence unit is placed in corresponding accommodating cavity, after the spherical and upper surface refraction of the light that described luminescence unit sends through described accommodating cavity, penetrate at this upper surface.
4. LED display according to claim 2, it is characterized in that, on described circuit substrate, offer two draw-in grooves that are parallel to each other, described light mixing device also comprises two buckles, this buckle buckle is arranged at described lower surface in parallel to each other, and corresponding with the position of described draw-in groove, this buckle is placed in corresponding draw-in groove, so that described light mixing device is installed on described circuit substrate.
5. LED display according to claim 1, is characterized in that, described light mixing device comprises lower surface and upper surface, between this lower surface and described upper surface, is parallel to each other, and described lower surface is to process through frosted the frosting forming.
6. LED display according to claim 5, it is characterized in that, the lower surface of described light mixing device is offered some accommodating cavities, described accommodating cavity is the arrangement position corresponding to described luminescence unit at the arrangement position of lower surface, described luminescence unit is placed in corresponding accommodating cavity, after the frosting and upper surface refraction of the light that this luminescence unit sends through described accommodating cavity, penetrate at this upper surface.
7. LED display according to claim 1, is characterized in that, described light mixing device is made up of transparent plastic.
8. LED display according to claim 7, is characterized in that, described light mixing device is made up of polycarbonate or polymethylmethacrylate.
9. LED display according to claim 1, it is characterized in that, described luminescence unit is monochromatic LED module, comprise monochromatic LED, each monochromatic LED is as a pixel, and described monochromatic LED is arranged and formed monochromatic LED array, and this monochromatic LED array is arranged on described circuit substrate, and be electrically connected with this circuit substrate, described light mixing device covers on this monochromatic LED array.
10. LED display according to claim 1, it is characterized in that, described LED display is full-color LED display screen, comprise the three-color LED array that is arranged on described circuit substrate and is electrically connected with this circuit substrate, described light mixing device covers on this all-colour LED array, described three-color LED array comprises some luminous group, each luminous group as a pixel, and send the light of different colours, described luminous group comprises emitting red light unit, green emitting unit and blue-light-emitting unit, this emitting red light unit, green emitting unit and blue-light-emitting unit are fixed on described circuit substrate, and be electrically connected with this circuit substrate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310015931.4A CN103927944A (en) | 2013-01-16 | 2013-01-16 | Light emitting diode (LED) display screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310015931.4A CN103927944A (en) | 2013-01-16 | 2013-01-16 | Light emitting diode (LED) display screen |
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| CN103927944A true CN103927944A (en) | 2014-07-16 |
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| CN201310015931.4A Pending CN103927944A (en) | 2013-01-16 | 2013-01-16 | Light emitting diode (LED) display screen |
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| CN107591095A (en) * | 2017-09-25 | 2018-01-16 | 上海九山电子科技有限公司 | A kind of transparency LED display screen |
| CN108320674A (en) * | 2018-04-11 | 2018-07-24 | 安徽大学 | A kind of LED display that can closely use |
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| CN110390891A (en) * | 2019-08-05 | 2019-10-29 | 深圳市玖润光电科技有限公司 | A kind of LED display mask |
| CN110745175A (en) * | 2019-10-30 | 2020-02-04 | 姚文涛 | Intelligent cart with route indication function and guide system thereof |
| CN113077762A (en) * | 2021-03-17 | 2021-07-06 | Tcl华星光电技术有限公司 | Driving method and driving circuit of Mini LED backlight module and display device |
| CN114141140A (en) * | 2021-11-01 | 2022-03-04 | 深圳市高展光电有限公司 | Blue light prevention display screen assembly |
| CN116913181A (en) * | 2023-09-06 | 2023-10-20 | 山西麦信易科技有限公司 | Micro-assembly LED display and assembly method |
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Application publication date: 20140716 |