CN201897934U - LED (light-emitting diode) display screen - Google Patents
LED (light-emitting diode) display screen Download PDFInfo
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- CN201897934U CN201897934U CN2010205047872U CN201020504787U CN201897934U CN 201897934 U CN201897934 U CN 201897934U CN 2010205047872 U CN2010205047872 U CN 2010205047872U CN 201020504787 U CN201020504787 U CN 201020504787U CN 201897934 U CN201897934 U CN 201897934U
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- mixing device
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Abstract
The utility model relates to an LED (light-emitting diode) display screen which comprises a circuit board and a plurality of LED elements distributed on the circuit board; in addition, the LED display screen also comprises a light mixing device arranged on the circuit board, wherein the light mixing device comprises a plurality of diffusion cavities; and at least one LED element is arranged in any one of the diffusion cavities. In the LED display screen, the diffusion cavities of the light mixing device are adopted to scatter LED light, the light emitting area and light mixing area of the LED elements are enlarged, and the area of dark zone is reduced, so that the granular sensation and glare sensation of pixels are reduced or eliminated, and the uniformity of screen brightness is improved. By adopting the technical scheme, the distribution density of the LED elements is not increased, special LED elements have no need to be designed and manufactured, and common LED elements can be directly used, therefore, the cost is low.
Description
Technical field
The utility model relates to a kind of LED display.
Background technology
The image display system that full-color LED display screen is made up of the three-color LED (light emitting diode) of One's name is legion.According to being installed, the occasion difference is divided into indoor screen and outdoor screen two big classes.Outdoor screen is because viewing distance is far away, and the spacing of light-emitting component (pel spacing) is bigger; The pel spacing of indoor screen is less for outdoor screen.Along with people constantly promote the pursuit of display effect and the updating of technology, the pel spacing of LED display is from 20mm, and 18mm is reduced to 4mm gradually, 3mm even littler.No matter be outdoor screen or indoor screen, its pixel arrangement synoptic diagram as shown in Figure 1.LED element 101 is according in good order being arranged on the circuit board 102 of certain interval rule; usually the size of LED element 101 only accounts for 1/2 of pel spacing, and promptly the blank spacing between the two adjacent LEDs element usually can be more than or equal to the size of LED element itself.When the LED element was lighted, its light-emitting zone was shown in 103, and brighter in the middle of presenting, there is non-luminous dark space 104 in the feature that the edge is darker outside light-emitting zone.
But existing LED display all has the following disadvantages:
(1) the picture particle sense is stronger
Because the ubiquity of dark space makes the LED screen when lighting, picture brightness is inhomogeneous, and cutting apart obviously between pixel and the pixel, the picture particle sense that shows is very strong, allows the people feel that picture is very coarse, and is fine and smooth inadequately.Especially when watching, it is discontinuous imperfect that picture can seem, has a strong impact on viewing effect in closely (for example indoor).
(2) the dazzling sense of picture is stronger
In addition, have a directivity because the LED element is luminous, the brightness of light-emitting zone concentrates near the central point, feels when human eye is watched to dazzle the eyes, and produces dazzling sense, more dazzlingly under than the low-light level environment feels bad indoor.
Because the existence of the problems referred to above, in traditional low pixel density LED display screen, the pel spacing that for example adopts Φ 5mmLED to make is the display screen of 10mm, and industry adopts densely arranged mode, pel spacing is decreased to 8mm or 7.25mm, reduces the picture particle sense; Adopt the mode that above element, increases the shading edge to improve contrast simultaneously.But so, can increase pixel arrangement density, make cost significantly rise.
On the other hand, in the more high pixel density LED display screen of the market demand, for example use the display screen of the pel spacing of Φ 2mmLED making as 4mm, because picture element density own is quite high, if adopt the mode that increases picture element density to reduce granular sensation again, will run into the circuit board bottleneck of arranging, the element of can't arranging; Because pel spacing is less, shading is along installing and fixing simultaneously, and traditional method can't be implemented on the high pixel density LED display screen.Though at present industry has proposed to adopt the special-shaped LED element of special LED element or non-rule to improve the element illumination effect in the hope of reaching the purpose that reduces granular sensation, because process issues and the cost cost is too high can't implement.
Therefore, provide a kind of picture element density that do not increase, cost is lower, and the LED display of the demonstration of effectively reduction pixel granular sensation and dazzling sense, and raising simultaneously contrast is real to be necessary.
The utility model content
The technical matters that the utility model solves provides a kind of picture element density that do not increase, and need not use special or special-shaped LED element, and cost is lower, effectively reduces the LED display of pixel granular sensation and dazzling sense simultaneously.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of LED display, comprise that circuit substrate and distribution are arranged on the some LED elements on the circuit substrate, in addition: this LED display also comprises the light mixing device that is arranged on the described circuit substrate, this light mixing device comprises some diffusion chambers, and at least one described LED element is arranged in arbitrary diffusion chamber.
As one of improving: described light mixing device is a transparent panel, and described diffusion chamber is the groove that is arranged on this transparent panel one side, and this groove tips upside down at least one described LED element.When adopting transparent material, the diffusion chamber inwall can keep pellucidity that light transmission is mixed with the edge light of adjacent elements reaching the mixed light purpose.
As two of improvement: described groove is the enlarging shape, and its flared end is fixedlyed connected with described circuit substrate.Light mixing device and circuit substrate can be fixed by the mode of bonding, also can adopt screw retention when the space is big.
As three of improvement: described groove be shaped as trapezoidal or arc.
As four of improvement: be coated with diffusion layer on the another side of described transparent panel.Diffusion layer can be directly to have the coat of diffusible molecule coated materials in the end face formation of diffusion chamber.Owing to the diffusion of diffusion chamber and diffusion layer, not only make the brightness deterioration of light-emitting zone center, effectively reduce dazzling sense, make display frame become soft, and the LED element directly is not exposed, and effectively reduce the reflections affect of ambient light, significantly improve the contrast of picture.
As five of improvement: described diffusion layer mixes the diffusing material layer that an amount of glass dust forms for light grey or other color blending agents.
As six of improvement: described light mixing device is a flat components, and described diffusion chamber is the flared aperture that is arranged on this flat components, and the narrow end of this flared aperture is fixedlyed connected with described substrate.
As seven of improvement: be coated with blending agent on the described flared aperture.In order to strengthen diffusion effect, can in flared aperture, apply blending agent, make its opaque attitude that becomes, make light behind intracavity reflecting with the edge optical superposition of adjacent LED element, thereby reach the purpose of mixed light.No matter this flat components is to adopt transparent material, or non-transparent material, can apply blending agent in flared aperture, to strengthen the colour mixture effect.
As eight of improvement: this LED display also comprises the plastic sheeting that is arranged on the described flat components, is stained with small granule proliferation on this plastic sheeting.This plastic sheeting can further strengthen diffusion effect.
As nine of improvement: the height L of described diffusion chamber and described LED element heights size H satisfy relational expression: L 〉=1.2H; Need satisfy relational expression: 0.85＜S/T＜1.5 between the long-pending T of the contact area S of described diffusion chamber and described circuit substrate and described LED element surface.So do to obtain mixed light effect preferably, simultaneously also can be preferably fixing light mixing device.
Compared with prior art, the beneficial effects of the utility model are: come scattering LED light by the diffusion chamber that adopts light mixing device, enlarge light-emitting zone and the mixed light zone of LED, reduce the dark space area, thereby reduce or eliminate the granular sensation and the dazzling sense of pixel, improve the homogeneity of picture brightness.And this mode can't increase the density of arranging of LED element, also do not need to design and produce special LED element, directly use the common LED element to get final product, so cost is also lower.
Description of drawings
Fig. 1 is existing LED display LED arrangement of elements and display effect synoptic diagram;
Fig. 2 is the structural representation of the utility model embodiment one;
Fig. 3 is the mixed light design sketch of the utility model embodiment one;
Fig. 4 is the structural representation of the utility model embodiment two.
Embodiment
Embodiment one
As shown in Figure 2, the LED display of present embodiment comprises that circuit substrate 205 and distribution are arranged on the some LED elements 201 on the circuit substrate 205, and is arranged on the light mixing device on the circuit substrate 205.
This light mixing device is a transparent panel 202, is distributed with the some grooves that cooperate with these some LED elements 201 on the one side of this transparent panel 202.Groove is the enlarging shape, and shape can be for trapezoidal arc etc., and its flared end is provided with towards circuit substrate 205, and promptly this groove tips upside down on the circuit substrate 205, has a LED element 201 in this groove at least.
The flared end of this groove is fixedlyed connected with circuit substrate 205 by viscose glue 204.Transparent panel 202 both can be fixed on the circuit substrate 205 by bonding mode, also can adopt screw retention on circuit substrate 205 when the space is big.In the present embodiment, groove can improve the light-emitting zone of LED as diffusion chamber, makes the edge light of adjacent LED element 201 mix, and plays the purpose of mixed light.
In addition, be coated with diffusion layer 203 on the another side of transparent panel 202.Diffusion layer 203 can be directly to have the coat that diffusible molecule coated materials forms on transparent panel 202 another sides.For example can use light gray or other color blending agents to mix and form diffusion layer 203 on the another side that directly is coated in transparent panel 202 behind an amount of glass dust.
According to the principle of luminosity of LED element 201, LED display is when showing complete white picture, and brightness can reach a very high numerical value, but intrinsic brilliance can not be entirely zero when showing complete black picture; Add LED element 201 and be exposed, meeting antireflection part ambient light own, the consequence of bringing thus is that the contrast of picture when reality is used is lower, and high-quality display frame can not be provided.In the present embodiment, because the diffusion of diffusion chamber and diffusion layer 203, not only make the brightness deterioration of light-emitting zone center, effectively reduce dazzling sense, make display frame become soft, and LED element 201 directly is not exposed, and effectively reduce the reflections affect of ambient light, significantly improve the contrast of picture.
In addition, in order further to improve the mixed light effect, simultaneously can be preferably fixing light mixing device.Diffusion chamber, promptly the surface of groove does not directly contact with LED element 201, but leaves certain clearance.The degree of depth L and the LED element 201 height dimension H that specifically are groove satisfy relational expression: L 〉=1.2H; Need satisfy relational expression: 0.85＜S/T＜1.5 between the contact area S of diffusion chamber and circuit substrate 205 and the LED element 201 surface area T.
In the present embodiment, LED element 201 physical dimension are 2mmX2mm, highly are 1mm, and the degree of depth of groove is about 1.4mm, and the contact area of groove and circuit board substrate is about 5mm2.Experiment shows can satisfy the mixed light needs, reaches the purpose of eliminating the pixel granular sensation, and the fixing of light mixing device and circuit board substrate also can easily be finished simultaneously.
As can be seen from Figure 2, LED element 201 luminous diffusion layers 203 by arrival end face after the groove transmission mix stack with the light of adjacent LED element 201, make to form a mixed light zone in original position, dark space that its effect as shown in Figure 3.
In Fig. 3, the brightness distribution curve of discrete component behind the 301 expression use light mixing devices, the Luminance Distribution effect curve of 302 expression mixed lights stacks.The light-emitting zone of 303 expression discrete components, 304 expression adjacent elements light-emitting zone overlapping portions.As can be seen from Figure 3, behind the use light mixing device, brightness has had bigger lifting behind the dark space part process stack mixed light originally, make the granular sensation of pixel lower, the center brightness of light-emitting zone can reduce simultaneously, and it is evenly soft that the brightness of whole display frame is tending towards, and do not have dazzling sense.In addition, because the existence of diffusion layer 203, though can reduce some brightness, it effectively reduces the reflections affect of ambient light, and the contrast of display frame is greatly improved.
Embodiment two
As shown in Figure 4, the difference of present embodiment and embodiment one is light mixing device.The light mixing device of present embodiment is a flat components 402, this flat components 402 be distributed with cooperate with LED element 401 on the circuit substrate 405 flared aperture.The narrow end of flared aperture is fixedlyed connected with circuit substrate 405 by viscose glue 404.
In addition,, can in flared aperture, apply blending agent, make its opaque attitude that becomes in order to strengthen diffusion effect, make light behind intracavity reflecting with the edge optical superposition of adjacent LED element 401, thereby reach the purpose of mixed light.No matter this flat components 402 is to adopt transparent material, or non-transparent material such as engineering plastics, can apply blending agent in flared aperture, to strengthen the colour mixture effect.In the present embodiment, employing is white blending agent.
In addition,, also be provided with plastic sheeting 403 on the flat components 402, be stained with small granule proliferation on this plastic sheeting 403 for further strengthening diffusion effect.In the present embodiment, plastic sheeting 403 is to adopt small granule proliferation (for example glass dust, molding powder etc.) is adhered to the independent rete that the mylar material is made, and this rete is arranged on the flat components 402 by modes such as viscose glue, pressings.
Same, in order to realize reducing the pixel granular sensation preferably, fix this flat components 402 simultaneously preferably.The height L of the flared aperture on the flat components 402 and LED element 401 height dimension H should satisfy relational expression: L 〉=1.2H, and the contact area S of narrow end of flared aperture and circuit board substrate and LED element 401 surface area T also should satisfy relational expression: 0.85＜S/T＜1.5.
The above only is two embodiment of the utility model; in fact according to principle of device of the present utility model; can be combined into multiple equivalent deformation device; for example; change the shape of diffusion chamber into cambered surface; after adopting suitable blending agent coating diffusion chamber, some application scenario can omit diffusion layer; the manufacturing materials of diffusion layer can adopt other plastic materials; the screw that fixedly changes into of diffusion chamber and circuit board substrate is fixed or the like; therefore protection domain of the present utility model is not limited thereto, and those of skill in the art are any to be included within the utility model protection domain based on non-material change on the technical solutions of the utility model.
Claims (9)
1. LED display, comprise circuit substrate (205,405), be arranged on some LED elements (201,401) on the circuit substrate with distribution, it is characterized in that: this LED display also comprises the light mixing device (202,402) that is arranged on the described circuit substrate, this light mixing device comprises some diffusion chambers, and at least one described LED element is arranged in arbitrary diffusion chamber.
2. LED display according to claim 1 is characterized in that: described light mixing device is transparent panel (202), and described diffusion chamber is the groove that is arranged on this transparent panel one side, and this groove tips upside down at least one described LED element.
3. LED display according to claim 2 is characterized in that: described groove is the enlarging shape, and its flared end is fixedlyed connected with described circuit substrate.
4. LED display according to claim 3 is characterized in that: described groove be shaped as trapezoidal or arc.
5. LED display according to claim 4 is characterized in that: be coated with diffusion layer (203) on the another side of described transparent panel.
6. LED display according to claim 1 is characterized in that: described light mixing device is flat components (402), and described diffusion chamber is the flared aperture that is arranged on this flat components, and the narrow end of this flared aperture is fixedlyed connected with described substrate.
7. LED display according to claim 6 is characterized in that: be coated with blending agent on the described flared aperture.
8. LED display according to claim 7 is characterized in that: this LED display also comprises the plastic sheeting (403) that is arranged on the described flat components, is stained with small granule proliferation on this plastic sheeting.
9. according to the arbitrary described LED display of claim 1 to 8, it is characterized in that: the height L of described diffusion chamber and described LED element heights size H satisfy relational expression: L 〉=1.2H; Need satisfy relational expression: 0.85＜S/T＜1.5 between the long-pending T of the contact area S of described diffusion chamber and described circuit substrate and described LED element surface.So do to obtain mixed light effect preferably, simultaneously also can be preferably fixing light mixing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205047872U CN201897934U (en) | 2010-08-24 | 2010-08-24 | LED (light-emitting diode) display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205047872U CN201897934U (en) | 2010-08-24 | 2010-08-24 | LED (light-emitting diode) display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201897934U true CN201897934U (en) | 2011-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205047872U Expired - Fee Related CN201897934U (en) | 2010-08-24 | 2010-08-24 | LED (light-emitting diode) display screen |
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| Country | Link |
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| CN (1) | CN201897934U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916534A (en) * | 2010-08-24 | 2010-12-15 | 广东威创视讯科技股份有限公司 | Led display screen |
| US9390637B2 (en) * | 2012-07-09 | 2016-07-12 | Nicholas G Varveris | Thin-wall panel modular light box sign and display |
| WO2017124902A1 (en) * | 2016-01-20 | 2017-07-27 | 中兴通讯股份有限公司 | Lamp mirror |
-
2010
- 2010-08-24 CN CN2010205047872U patent/CN201897934U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916534A (en) * | 2010-08-24 | 2010-12-15 | 广东威创视讯科技股份有限公司 | Led display screen |
| US9390637B2 (en) * | 2012-07-09 | 2016-07-12 | Nicholas G Varveris | Thin-wall panel modular light box sign and display |
| WO2017124902A1 (en) * | 2016-01-20 | 2017-07-27 | 中兴通讯股份有限公司 | Lamp mirror |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110713 Termination date: 20170824 |
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| CF01 | Termination of patent right due to non-payment of annual fee |