CN202268380U - Led device and lead frame - Google Patents
Led device and lead frame Download PDFInfo
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- CN202268380U CN202268380U CN2011201894304U CN201120189430U CN202268380U CN 202268380 U CN202268380 U CN 202268380U CN 2011201894304 U CN2011201894304 U CN 2011201894304U CN 201120189430 U CN201120189430 U CN 201120189430U CN 202268380 U CN202268380 U CN 202268380U
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
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Abstract
The utility model discloses an LED device and a lead frame. The LED device has a reflection cup which has a circular underside and a wall surface, the wall surface has a variable obliquity relative to the underside and limits an opening at the upper end of the wall surface, and the LED is arranged on the underside; wherein, the reflection cup has a depth greater than 0.25 mm from the upper end of the wall surface to the underside and has an elliptic shape, the lead frame comprises the reflection cup having the circular underside and the wall surface, and the wall surface has the variable obliquity relative to the underside and limits the opening at the upper end of the wall surface; wherein, the reflection cup has the depth greater than 0.25 mm from the upper end of the wall surface to the underside and has the elliptic shape.
Description
Technical field
The disclosure relates in general to light-emitting diode (LED), more specifically, relates to LED device with narrow visual angle and the light-emitting diode display that comprises this device.
Background technology
In the last few years, the LED technology had obtained significant improvement, the feasible LED that has begun to occur brightness increase and color fidelity increase.Because these improved LED and improved image processing techniques, large-scale and full-color LED display can obtain, and is generally used now.Light-emitting diode display typically comprises the combination of each LED panel, and the image resolution ratio that it provided is by the distance between the neighbor or " pel spacing " decision.
Be intended to have relatively large pel spacing, and generally include discontinuous led array from the outdoor display of watching more at a distance.In discontinuous led array, drive redness, green and the blue led of one group of independent installation, to form the appearance that the observer appears to full-color pixel.On the other hand; (for example need short pel spacing; 3mm or littler) indoor screen comprises that typically carrying is installed on the panel of redness, green and blue led on the single electronic device, and said electronic installation is attached with the driver printed circuit board (PCB) (PCB) of the output of each electronic installation of control.
Though indoor and outdoor display all can be observed on very big off-axis angle scope,, along with the increase at visual angle, can feel the loss of color fidelity usually.In addition, the material that the material of each LED device and/or be used for is installed each LED can have reflection characteristic, and it can further reduce color fidelity through producing unwanted light reflection and/or dazzle.
Usually, the LED device hopes to have the visual angle of relative broad, makes that observer's possibility can be with different angles observation post images displayed and video.Yet, there is such certain situation, in these situation, narrow visual angle is preferred.For example, when high beam intensity (high beam intensity) when being preferred, the LED device with visual angle of relative narrower is preferred.And from the consideration of safety and privacy, the user of light-emitting diode display possibly more hope: in the public domain, other people of his on every side can't see his or her light-emitting diode display and attend institute's content displayed.In addition, with wide visual angle display in comparison, this light-emitting diode display that is used for individual's use can consume energy still less.
The utility model content
A purpose of the present disclosure is to produce the LED device with narrow visual angle and even far field pattern.Can in light-emitting diode display, use disclosed LED device, to obtain high-quality and high performance video display screen.
According to aspect of the utility model, a kind of LED device is provided, comprising: lead frame, wherein have reflector, said reflector has rounded bottom surface and wall, and said wall has variable inclination and locates to limit opening in the top with respect to said bottom surface; And LED, be installed on the said bottom surface, wherein, said reflector have greater than 0.25mm from the upper end of said wall to the degree of depth of said bottom surface, said reflector has elliptical shape.
Further, said rounded bottom surface has the diameter less than 0.7mm.
Further, said diameter is less than 0.65mm.
Further, the said degree of depth is 0.25mm to 0.40mm.
Further, said opening has oval geometry, its have 0.8mm to 0.9mm along the first size of first axle and 0.7mm to 0.8mm along with second size of second axis of said first axle quadrature.
Further, said LED is green light LED or blue-ray LED.
Further, said opening has circular geometry, and has the diameter of 0.9mm to 1.1mm.
Further, said LED is a red-light LED.
Further, said opening has oval geometry, said wall limit 40 ° to 60 ° first opening angle and 20 ° to 40 ° with said first opening angle second opening angle of quadrature basically.
Further, said first opening angle is 45 ° to 55 °, and said second opening angle is 25 ° to 35 °.
Further, said first opening angle and second opening angle respectively with the far field pattern of said LED device in the horizontal view angle with vertically the visual angle is corresponding.
Further, said opening has circular geometry, and said wall has the vertical part that combines with said bottom surface and said bottom surface and sloping portion are separated, and wherein, said sloping portion limits 50 ° to 70 ° opening angle.
Further, said opening angle is 55 ° to 65 °.
Further, said lead frame is fabricated from iron.
Further comprise the symmetric lens that covers said lead frame at least in part.
Further, said lens have oval cross section, and it has along the first size of first axle with along second size of second axis, and said first size is longer than said second size.
Further, said first size is less than 4.4mm, and said second size is less than 3.5mm.
Further, said symmetric lens has the section height of 5.3mm at least.
According to the utility model on the other hand; A kind of lead frame is provided; Comprise the reflector with rounded bottom surface and wall, said wall has variable inclination and limits opening in the top with respect to said bottom surface, wherein; Said reflector have greater than 0.25mm from the upper end of said wall to the degree of depth of said bottom surface, said reflector has elliptical shape.
Further, said rounded bottom surface has the diameter less than 0.7mm.
Further, said diameter is less than 0.62mm.
Further, the said degree of depth is 0.28mm to 0.36mm.
Further comprise the LED on the bottom surface that is installed on said reflector.
Further comprise the LED that sends green glow or blue light that is installed on the said bottom surface, wherein, the said degree of depth is 0.25mm to 0.31mm.
Further comprise the LED that sends ruddiness that is installed on the said bottom surface, wherein, the said degree of depth is 0.32mm to 0.38mm.
According to the utility model on the other hand, a kind of LED device is provided, comprises: reflector; Have rounded bottom surface and wall; Said wall has vertical part with respect to said bottom surface and combines with said bottom surface, and said vertical part is separated said bottom surface and sloping portion, wherein; Said sloping portion limits opening in the top, and said reflector has elliptical shape; And LED, be installed on the said bottom surface.
Further, said sloping portion limits 50 ° to 70 ° opening angle.
Further, said sloping portion limits 55 ° to 65 ° opening angle.
Further, the length of said vertical part is less than the length of said sloping portion.
Further, said reflector have 0.25mm to 0.40mm from the upper end of said sloping portion to the degree of depth of said bottom surface.
An execution mode of LED device comprises the lead frame that wherein has reflector.Reflector has rounded bottom surface and wall, and wall has variable inclination and limits opening in the top with respect to the bottom surface.LED is installed on the bottom surface.Reflector have greater than about 0.25mm from the upper end of wall to the degree of depth of bottom surface.
Another execution mode discloses a kind of display that comprises substrate, the arrange array of light-emitting diode (LED) device that places vertical row and horizontal line of base plate carrying one.At least one comprises that the LED device of lead frame has reflector.Reflector has rounded bottom surface, also has wall, and wall has variable inclination and limits opening in the top with respect to the bottom surface.On the bottom surface of reflector, LED is installed.Reflector have greater than about 0.25mm from the upper end of wall to the degree of depth of bottom surface.This display further comprises the signal processing and the led drive circuit of electrical connection, optionally encouraging the LED device array, thereby on display, produces visual image.
Another execution mode discloses a kind of lead frame that comprises reflector, and reflector has rounded bottom surface and wall, and wall has variable inclination and limits opening in the top with respect to the bottom surface.Reflector have greater than about 0.25mm from the upper end of wall to the degree of depth of bottom surface.
The 4th execution mode discloses a kind of LED device that comprises reflector, and reflector has rounded bottom surface and wall.Wall has vertical part with respect to the bottom surface and combines with the bottom surface.Vertically part is separated bottom surface and sloping portion at the upper end of reflector qualification opening.LED is installed on the bottom surface.
The 5th execution mode discloses a kind of led module, and it comprises the first and second LED devices that send different colours.The first and second LED devices have the far field pattern of coupling on first and second directions.First visual angle on the first direction is less than about 99 °, and second visual angle on the second direction is less than about 50 °.
The 6th execution mode discloses a kind of display that comprises substrate, base plate carrying be arranged in the led module array in vertical row and the horizontal line.Light-emitting diode display produces at least approximately brightness of 5000nit.Each led module comprises the first and second LED devices that send different colours.The first and second LED devices have the far field pattern of coupling basically on first and second directions.First visual angle on the first direction is less than about 99 °, and second visual angle on the second direction is less than about 50 °.Light-emitting diode display also comprises the signal processing and the led drive circuit of electrical connection, optionally encouraging the led module apparatus array, thereby on display, produces visual image.
The 7th execution mode discloses a kind of display that comprises substrate, base plate carrying be arranged in the led module array in vertical row and the horizontal line.Spacing between the adjacent LED modules is less than about 44mm.Light-emitting diode display produces at least approximately extremely approximately brightness of 24000nit of 5000nit.Each led module comprises the first and second LED devices that send different colours.The first and second LED devices have the far field pattern of coupling basically on first and second directions.First visual angle on the first direction is less than about 99 °, and second visual angle on the second direction is less than about 50 °.Light-emitting diode display also comprises the signal processing and the led drive circuit of electrical connection, optionally encouraging the led module apparatus array, thereby on display, produces visual image.
The 8th execution mode discloses a kind of display that comprises substrate, base plate carrying be arranged in the led module array in vertical row and the horizontal line.Spacing between the adjacent LED modules is less than about 20mm.Display also comprises the signal processing and the led drive circuit of electrical connection, optionally encouraging the led module array, thereby on display, produces visual image.Each led module comprises the LED that sends green glow, send the 2nd LED device of blue light and send the 3rd LED of ruddiness, and wherein, display has the brightness of about 5000nit.The first and second LED devices have the far field pattern of coupling basically on first and second directions, first visual angle on the first direction is less than about 99 °, and second visual angle on the second direction is less than about 50 °.The operating current of the one LED is less than about 4.1mA, and the operating current of the 2nd LED is less than about 2.7mA, and the operating current of the 3rd LED is less than about 3.1mA.The voltage supply of the one LED is less than about 2.6V, and the voltage supply of the 2nd LED is less than about 2.44V, and the voltage supply of the 3rd LED is less than about 1.81V.For a LED device, the lamp power efficiency is about 161lm/W, is about 33lm/W for the 2nd LED device, and, be about 152lm/W for the 3rd LED device.When producing ruddiness, display consumes is less than about 14.0W/m
2, when producing green glow, display consumes is less than about 26.6W/m
2, when producing blue light, display consumes is less than about 16.8W/m
2, when producing white light, display consumes is less than about 57.4W/m
2With other display in comparison of using the common LED device, this display saves about 40% or more power.
The 9th execution mode discloses a kind of LED device, and it is constructed on first direction, produce less than the first about 99 ° visual angle, and on second direction, produces less than the second about 50 ° visual angle.
The tenth execution mode discloses a kind of LED device that comprises lead frame, has reflector in the lead frame.Reflector has rounded bottom surface and wall, and wall has variable inclination and limits opening in the top with respect to the bottom surface.LED is installed in center at rounded bottom surface.LED has less than the first about 99 ° visual angle and on second direction, is having the second only about half of visual angle less than first visual angle on the first direction.
The 11 execution mode discloses a kind of LED device, and it is constructed to producing first visual angle on the first direction and on second direction, producing second visual angle.First and second visual angles are less than about 50 °.First direction and second direction quadrature.
The 12 execution mode discloses a kind of display that comprises pel array.Each pixel has at least one light-emitting diode (LED) device, and light-emitting diode (LED) device comprises the lead frame with reflector.Reflector has rounded bottom surface and wall, and wall has variable inclination and limits opening in the top with respect to the bottom surface.LED is installed on rounded bottom surface.Display also comprises the signal processing and the led drive circuit of electrical connection, optionally encouraging the LED device array, thereby on display, produces visual image.Reflector have greater than about 0.25mm from the upper end of wall to the degree of depth of bottom surface.Pel spacing between the neighbor is less than about 44mm.
The 13 execution mode discloses a kind of light-emitting diode display; It is constructed to produce the two-dimentional far field pattern with elliptical shape; Wherein, The elliptical shape of the distance of the about 50m of range display has less than the first size of about 143m and on second direction, is having less than about second size of 58m on the first direction, wherein, and first direction and second direction quadrature.
The 14 execution mode discloses a kind of light-emitting diode display, and it is constructed to produce the two-dimentional far field pattern with elliptical shape, and wherein, the elliptical shape of the distance of the about 50m of range display has the horizontal size less than about 143m on first direction.
Description of drawings
Fig. 1 is the vertical view according to the LED device of the execution mode of the utility model;
Fig. 2 is the cross-sectional view of cutting open along hatching 2-2 of execution mode shown in Figure 1;
Fig. 3 shows the lateral parts sectional side view of cutting open along view line 3-3 of execution mode among Fig. 1;
Fig. 4 is the vertical view according to the LED device of another execution mode of the present disclosure;
Fig. 5 is the cross-sectional view of cutting open along hatching 5-5 of execution mode shown in Figure 4;
Fig. 6 shows the lateral parts sectional side view of cutting open along view line 6-6 of execution mode among Fig. 4;
Fig. 7 is the front view that is used for according to the lens of LED device of the present disclosure;
Fig. 8 is second end view of the lens of the covering LED device among Fig. 7;
Fig. 9 is second end view of the lens of the covering LED device among Fig. 7;
Figure 10 is the vertical view of the lens among Fig. 7;
Figure 11 is the plane graph that comprises according to the part of the LED display of the LED device of execution mode of the present disclosure;
Figure 12 (a) shows the chart according to the horizontal far field pattern of the LED device of an execution mode of the present disclosure;
Figure 12 (b) shows the chart according to the vertical far field pattern of the LED device of an execution mode of the present disclosure;
Figure 13 (a) shows the chart according to the horizontal screen curve of the LED device of an execution mode of the present disclosure;
Figure 13 (b) shows the chart according to the vertical screen curve of the LED device of an execution mode of the present disclosure; And
Figure 14 shows the sketch map according to the display of the generation two dimension far field pattern of an execution mode of the present disclosure.
Embodiment
Below describe to have introduced and represent the disclosed preferred implementation that is used to put into practice best mode of the present disclosure.This description is not restrictive, but only is used to describe the purpose of General Principle of the present disclosure, and the scope of the utility model is defined by the following claims.
Now, the execution mode of the utility model will be described hereinafter more fully, the execution mode of the utility model shown in the drawings with reference to accompanying drawing.Yet the utility model can many multi-form realizations, and, should it be interpreted as and be limited to the execution mode of setting forth here.On the contrary, these execution modes are provided, make that the disclosure will be abundant and complete, and the scope of the utility model is fully conveyed to those skilled in the art.Similar Reference numeral is represented similar element.
To understand, though here maybe be with term first, second wait and describe various elements, do not use these terms and limit these elements.These terms only are used for distinguishing an element and another element.For example, under the prerequisite of the scope that does not deviate from the utility model, first element can be called second element, and similarly, second element can be called first element.As used herein, term " and/or " comprise any of one or more relevant Listed Items and all combinations.
To understand, when being called an element (for example, layer, zone or substrate) on another element or extending on another element, its can be directly on another element or directly extend on another element, perhaps, also can have element between two parties.On the contrary, when an element being called directly on another element or directly extending on another element, there is not element between two parties.Also will understand, " be connected " with another element or when " coupling ", it can directly be connected with another element or couple, and perhaps, can have element between two parties when an element is called.On the contrary, " directly be connected " with another element or when " directly coupling ", do not have element between two parties when an element is called.
Here; Available relative terms (for example; " ... following " or " ... top " or " top " or " following " or " level " or " vertically ") element, layer or zone and another element, layer or regional relation described, as shown in scheming.To understand, except the direction shown in the figure, these terms are intended to comprise the different directions of device.
Term used herein is in order only to describe the purpose of specific implementations, and is not to be intended to limit the utility model.As used herein, singulative " a ", " an " and " the " are intended to also comprise plural form, are not like this only if context clearly shows.Will be further understood that; When used herein; Term " comprises ", " comprising ", " comprising " and/or the existence of said characteristic, integral body, step, operation, element and/or parts is described " comprising ", but does not get rid of the existence or the increase of one or more further features, integral body, step, operation, element, parts and/or its group.
Only if definition in addition, otherwise all terms used herein (comprising technology and scientific terminology) all have the identical meanings that the those of ordinary skill of the affiliated technical field of the utility model can both be understood.Will be further understood that; Should be the consistent implication of its implication that has in the context of specification therewith and the association area with terminological interpretation used herein; And, with on Utopian or too formal meaning, it not being made an explanation, only if definition so clearly here.
Far field pattern (FFP) is a kind of optical characteristics of LED device, and it represents the luminous intensity of LED device in the space.Usually, FFP shows the standard luminous intensity at different angle of radiation place.As used herein, the visual angle is such angular range, in this angular range, the light intensity that sends from the LED device be the FFP intensity peak about at least 50%.
Fig. 1 to Fig. 3 has illustrated an execution mode of LED device 10 in different views.Fig. 1 is the vertical view of LED device 10.LED device 10 comprises the lead frame 12 with reflector 20.The wall 23 that reflector 20 has rounded bottom surface 22 and tilts with respect to bottom surface 22, wall limits opening 24 in the upper end of reflector 20.According to an execution mode of the present disclosure, the inclination angle between wall 23 and the bottom surface 22 changes at the difference place around bottom surface 22 peripheries.
In some embodiments, bottom surface 22 has the diameter 26 of about 0.50mm to about 0.70mm, and more preferably, approximately 0.58mm arrives about 0.62mm, most preferably, and about 0.60mm.In other embodiments, bottom surface 22 has the diameter 26 less than about 0.70mm, more preferably less than about 0.65mm, most preferably less than about 0.60mm.LED 30 is installed in the center on bottom surface 22.
In this execution mode, along the horizontal view angle of first axle 40 greater than visual angle along second axis 50.LED 30 can send ruddiness, green glow or blue light.Preferably, LED 30 sends green glow or blue light.LED device 10 can further comprise adhesive pad zone 70 and 72, so that LED 30 is used wire-bonded with lead frame 12.
Fig. 2 is the cross-sectional view of cutting open along hatching 2-2 of the execution mode among Fig. 1.Reflector 20 have greater than about 0.25mm from the upper end of wall 23 to the bottom surface 22 the degree of depth " h ".When LED 30 sent green glow or blue light, the preferably about 0.25mm of degree of depth h more preferably was extremely approximately 0.36mm of about 0.28mm to about 0.40mm, most preferably is about 0.28mm.Adhesive pad 70 is connected with lead-in wire 74 conduction ground, and adhesive pad 72 is connected with lead-in wire 76.Reflector 20 has wall portion 44, in the time of in reflector 20 being impressed into lead-in wire 76, forms this wall portion 44, for example the operation through marking press.Wall portion 44 can have uneven thickness in lead-in wire 76.Comprise wall portion 44 and the composition of 70 and 72 the lead frame 12 of going between can be the material such as copper, iron, or other suitable electric conducting material that also can dispel the heat.In a preferred implementation, lead frame 12 is made up of iron.
Fig. 3 shows the part sectional side view of LED device 10.Referring to figs. 1 to Fig. 3, the wall 23 that reflector 20 has rounded bottom surface 22 and tilts with respect to bottom surface 22.Wall 23 centers on the periphery of bottom surface 22 and variation continuously with respect to the inclined degree of bottom surface 22, makes that first opening angle (the open angle) 28 among Fig. 2 is different with second opening angle 58 among Fig. 3.In aspect of the disclosed execution mode of LED device 10, first opening angle 28 and additional design feature can fully be set up the horizontal view angle of LED device 10 together.Correspondingly, second opening angle 58 can be set up the vertical visual angle of LED device 10 fully.In one embodiment, first opening angle 28 can make that for example, the horizontal view angle of LED device 10 is greater than vertical visual angle less than second opening angle 58.
Preferably, like what in Fig. 2, see, first opening angle 28 of reflector 20 is less than about 55 °, more preferably, and less than about 53 °, most preferably less than about 50 °.Correspondingly, second opening angle 58 is less than about 35 °, more preferably less than about 33 °, most preferably less than about 30 °.In another embodiment, first opening angle 28 is about 45 ° to about 55 °, more preferably, about 47 ° to greater than 53 °, most preferably about 50 °.Correspondingly, second opening angle 58 is about 25 ° to about 35 °, more preferably about 27 ° to about 33 °, and most preferably about 30 °.
Fig. 4 to Fig. 6 shows another execution mode according to LED device 110 of the present disclosure.Fig. 4 is the vertical view of LED device 110.Fig. 5 is the cross-sectional view of cutting open along hatching 5-5 of the LED device 110 among Fig. 4.Fig. 6 shows the lateral parts sectional side view of cutting open along view line 6-6 of LED device 110 among Fig. 4.
In some embodiments, bottom surface 122 has preferably the approximately diameter 126 of the extremely about 0.70mm of 0.50mm, and more preferably about 0.58mm is 0.62mm extremely approximately, most preferably about 0.60mm.In other embodiments, bottom surface 122 has the diameter 126 less than about 0.70mm, more preferably less than about 0.65mm, most preferably, less than about 0.60mm.In some embodiments, opening 124 has preferred diameter 127 less than about 1.1mm, more preferably, and less than about 1.05mm, most preferably, less than about 1.0mm.In other embodiments, opening 124 has preferably the approximately diameter 127 of the extremely about 1.1mm of 0.9mm, and more preferably about 0.95mm is 1.05mm extremely approximately, most preferably, and about 1.0mm.Similar with execution mode before, comprise that the lead frame 112 of wall portion 144 and lead-in wire 170 and 172 can be by copper, iron, or other suitable electric conducting material composition that also can dispel the heat.In one embodiment, lead frame 112 is made up of iron.
The vertical part 134 of wall 123 has height " h1 ", and sloping portion 132 has height " h2 ".Wall 123 has total height h3=h1+h2, and the degree of depth of itself and reflector 120 is corresponding.The section height of the comparable LED 130 of height h1 is big slightly.In addition, height h2 can be greater than height h1.In some embodiments, h3 is greater than about 0.25mm.Preferably, height h3 is extremely approximately 0.40mm of about 0.25mm, and more preferably, about 0.32mm is 0.38mm extremely approximately, most preferably, and about 0.35mm.
Person of skill in the art will appreciate that the performance of disclosed LED device will change according to above disclosed concrete design parameter and the light wavelength of being sent by the LED that is contained in the disclosed LED device here.In some embodiments, LED device 10 and 110 can produce the peak value luminous intensity (lv) of the scope from about 1205mcd to about 6100mcd less than the operating current of about 20mA.
Send at LED 30 and 130 under the situation of green glow, for example, LED device 10 and 110 can produce at least approximately peak value luminous intensity of 5600mcd, more preferably about at least 6000mcd, most preferably about at least 6300mcd.In another example, LED device 10 and 110 can produce the extremely approximately peak value luminous intensity of 6100mcd of about 5600mcd, and more preferably about 5800mcd is to about 5900mcd, and most preferably about 5820mcd is to about 5880mcd.One especially preferred embodiment in, LED 30 and 130 with about 520nm to about 535nm and be centered in the wavelength of about 527nm and produce the peak value luminous intensity of about 5850mcd.
Correspondingly, send at LED 30 and 130 under the situation of blue light, for example, LED device 10 and 110 can produce at least approximately peak value luminous intensity of 1205mcd, more preferably about at least 1605mcd, most preferably about at least 1905mcd.In another example, LED device 10 and 110 can produce the extremely approximately peak value luminous intensity of 1705mcd of about 1205mcd, and more preferably about 1405mcd is to about 1505mcd, and most preferably about 1425mcd is to about 1485mcd.One especially preferred embodiment in, LED 30 and 130 with about 460nm to about 475nm and be centered in the wavelength of about 470nm and produce the peak value luminous intensity of about 1455mcd.
Send at LED 30 and 130 under the situation of ruddiness, for example, LED device 10 and 110 can produce at least approximately peak value luminous intensity of 3300mcd, more preferably about at least 3700mcd, most preferably about at least 4000mcd.In another example, LED device 10 and 110 can produce the extremely approximately peak value luminous intensity of 4135mcd of about 3635mcd, and more preferably about 3835mcd is to about 3935mcd, and most preferably about 3855mcd is to about 3915mcd.One especially preferred embodiment in, LED 30 and 130 with about 619nm to about 624nm and be centered in the wavelength of about 621nm and produce the peak value luminous intensity of about 3885mcd.
In other embodiments, preferably, first visual angle can be about 63 ° to about 99 °.More preferably, first visual angle is about 75 ° to about 93 °.Most preferably, first visual angle is about 80 ° to about 90 °.In these execution modes, preferably, second visual angle is about 35 ° to about 50 °, more preferably, and about 38 ° to about 48 °, most preferably, about 40 ° to about 46 °.
For example, in the center of rounded bottom surface 22 LED 30 is installed, LED device 10 has on first direction less than the first about 99 ° visual angle, and on second direction, has the second only about half of visual angle less than first visual angle.Similarly, LED device 110 has on first direction less than the first about 97 ° visual angle, and on second direction, has the second only about half of visual angle less than first visual angle.
Fig. 7 shows the lens 80 that can use with LED device disclosed herein.Lens 80 have oval-shaped base opening 84 and cheese upper surface 88.In addition, lens 80 have section height 82 and sectional width 86.In some embodiments, preferably, section height 82 is about at least 5.3mm, more preferably about at least 5.8mm, most preferably about at least 6.3mm.In other embodiments, preferably, section height 82 is extremely approximately 6.3mm of about 5.3mm, and more preferably about 5.5mm is 6.1mm extremely approximately, most preferably, and about 6.3mm.
To Figure 10, lens 80 cover reflector 20 and LED 30 at least in part with reference to figure 8.Lens 80 have the cross section of elliptical shape, and it has the first size 86 and second size 87.First size 86 is preferably long than second size 87.In some embodiments, preferably, first size 86 is less than about 4.4mm, more preferably, and less than about 4.2mm, most preferably, less than about 3.9mm.Second size 87 is less than about 3.5mm, more preferably, and less than about 3.3mm, most preferably less than about 3.0mm.In other embodiments, first size 86 is extremely approximately 4.4mm of about 3.4mm, and more preferably, about 3.6mm is 4.2mm extremely approximately, most preferably about 3.9mm.Second size 87 is extremely approximately 3.5mm of about 2.5mm, and more preferably, about 2.7mm is 3.3mm extremely approximately, most preferably, and about 3.0mm.
Figure 11 is the plane graph of the part of LED display 200, for example, comprises the display screen that carries the driver PCB 202 that is arranged in a large amount of led modules 204 in the row and column.Display screen 200 is divided into a plurality of pixels 210, and each pixel has led module 204, and each led module comprises the substrate that carries a plurality of LED devices 206.In pixel 210, can have a plurality of led modules 204.Each pixel 210 of display can have about 10mm * about 10mm or bigger size.Available different voltages with different level drives each led module.Led module 204 comprises the LED device, for example in Fig. 1 to Figure 10, describes more than those and illustrates.Led module is electrically connected to metal (trace) or pad (not shown) on the PCB202, and it is handled LED and is connected with the drive circuit (not shown) with the suitable signal of telecommunication.Signal processing and led drive circuit are electrically connected, optionally encouraging the LED device 206 in the led module 204, thereby on display, produce visual image.Between pixel 210, can have and be used for PCB 202 is fixed to the hole 208 of mounting platform.
In one embodiment, preferably, LED display 200 can produce at least approximately brightness of 5000nit, more preferably, and about at least 10000nit, most preferably, about at least 15000nit.Especially, light-emitting diode display 200 can produce at least approximately brightness of 20000nit, more particularly, produces at least approximately brightness of 24000nit with the operating current less than about 20mA.In another embodiment, LED display 200 can produce the peak brightness greater than about 16000nit less than the operating current of about 20mA.Preferably, LED 200 can have the pel spacing less than about 44mm, more preferably, and less than about 35mm, most preferably, less than about 30mm.Especially, LED 200 can have the pel spacing less than about 25mm, more particularly, and less than about 20mm.For example, LED display 200 approximately operating current and the about 20mm of 20mA pel spacing and produce the peak brightness of about 24375nit.For the brightness with about 5000nit and the about common outdoor LED screen of the pel spacing of 20mm, the operating current of each LED device that is used for LED display 200 is less than about 6.2mA.Compare LED display 200 saving about 40% or more power with other light-emitting diode display that uses the common LED device.
Person of skill in the art will appreciate that operating current will change according to the light wavelength of being sent by display.Preferably, the operating current of device that sends green glow is less than about 6.1mA, more preferably, and less than about 5.1mA.One especially preferred embodiment in, the operating current that sends the device of green glow is about 4.1mA.Preferably, the operating current of device that sends blue light is less than about 4.7mA, more preferably, and less than about 3.7mA.One especially preferred embodiment in, the operating current that sends the device of ruddiness is about 2.7mA.Preferably, the operating current of device that sends ruddiness is less than about 5.1mA, more preferably, and less than about 4.1mA.One especially preferred embodiment in, the operating current that sends the device of ruddiness is about 3.1mA.
For the common outdoor LED screen of the brightness with about 5000nit with the pel spacing of about 20mm, required peak value lamp luminous intensity is about 2000mcd.For the device that sends ruddiness, corresponding work voltage is about 1.81V, for the device that sends green glow, less than about 2.6V, for the device that sends blue light, less than about 2.44V.For the device that sends ruddiness, corresponding lamp power efficiency is about 152lm/W, for the device that sends green glow, approximately is 161lm/W, for the device that sends blue light, is about 33lm/W.
Compare with other LED display, LED display 200 can consume the power of much less.Preferably, for ruddiness, the power consumption of the screen of 1m * 1m is less than about 30W, for green glow less than about 40W, for blue light less than about 20W.More preferably, for ruddiness, the power consumption of the screen of 1m * 1m is less than about 25W, for green glow less than about 30W, for blue light less than about 18W.Most preferably, for the device that sends ruddiness, the power consumption of the screen of 1m * 1m is less than about 14.0W, for green glow less than about 26.6W, for blue light less than about 16.8W.Preferably, the total power consumption of the screen of 1m * 1m is less than about 90W.More preferably, the total power consumption of the screen of 1m * 1m is less than about 73W, most preferably, and less than about 57.4W.
Led module 204 comprises the LED device 206 of the reflector that at least one has above disclosed elliptical shape.For example, led module 204 comprises first and second LED device 206a and the 206b that send different colours.The first and second LED device 206a and 206b preferably have the far field pattern (FFP) of coupling on first and second directions.In one embodiment, the first and second LED device 206a and 206b have less than the first about 99 ° visual angle and on second direction, are having less than the second about 50 ° visual angle on the first direction.More preferably, first visual angle on the first direction is less than about 90 °, and second visual angle on the second direction is less than about 45 °, and most preferably, first visual angle on the first direction is less than about 85 °, and second visual angle on the second direction is less than about 40 °.Each led module 204 further comprises the 3rd LED device 206c, and it sends the color various colors with the first and second LED devices.In some embodiments, the 3rd LED device 206c can have the visual angle identical with first and second visual angles.In other embodiments, the 3rd LED device 206c can have the little visual angle, first and second visual angles than the first and second LED device 206a and 206b.Preferably, for the 3rd LED device 206c, first visual angle on the first direction is less than about 93 °, and second visual angle on the second direction is less than about 48 °.More preferably, first visual angle on the first direction is less than about 88 °, and second visual angle on the second direction is less than about 43 °.Most preferably, first visual angle on the first direction is less than about 83 °, and second visual angle on the second direction is less than about 38 °.In one embodiment, a LED device 206a sends green glow, and the 2nd LED device 206b sends blue light, and the 3rd LED device 206c sends ruddiness.
Preferably; The one LED device 206a is to produce the peak value luminous intensity of about 1200mcd less than the operating current of about 6.1mA; The 2nd LED device 206b is to produce the peak value luminous intensity of about 200mcd less than the operating current of about 4.7mA, the 3rd LED device 206c is to produce the peak value luminous intensity of about 600mcd less than the operating current of about 5.1mA.More preferably; The one LED device 206a is to produce the peak value luminous intensity of about 1200mcd less than the operating current of about 5.1mA; The 2nd LED device 206b is to produce the peak value luminous intensity of about 200mcd less than the operating current of about 3.7mA, the 3rd LED device 206c is in the peak value luminous intensity that produces about 600mcd less than the operating current of about 4.1mA.Most preferably; The one LED device 206a is to produce the peak value luminous intensity of about 1200mcd less than the operating current of about 4.1mA; The 2nd LED device 206b is to produce the peak value luminous intensity of about 200mcd less than the operating current of about 2.7mA, the 3rd LED device 206c is to produce the peak value luminous intensity of about 600mcd less than the operating current of about 3.1mA.
In one embodiment, corresponding light-emitting diode display consumption is less than about 60W/m
2, for example, about 57.4W/m
2Preferably, light-emitting diode display consumption is less than about 20W/m
2, to produce every kind of red, green and blue color.For example, light-emitting diode display consumption is less than about 14.0W/m
2, to produce ruddiness, light-emitting diode display consumption is less than about 26.6W/m
2, to produce green glow, light-emitting diode display consumption is less than about 16.8W/m
2, to produce blue light.In one embodiment, light-emitting diode display is with the pel spacing of the operating current of about 20mA and about 20mm and the brightness that produces about 24375nit.
Person of skill in the art will appreciate that available different modes group is arranged the LED device in led module 204, and it still can realize the advantage of LED device disclosed herein.
Figure 12 (a) shows the comparative horizontal FFP according to the LED device 254 of LED device 252 of the present disclosure and prior art.Like what seen, horizontal FFP 252 beguines of disclosed LED device are more level and smooth according to the horizontal FFP 254 of the LED device of prior art.Figure 12 (b) shows the comparative vertical FFP of the LED device 258 of disclosed LED device 256 and prior art.Like what seen, the vertical FFP 256 of disclosed LED device is more level and smooth than the vertical FFP 258 of prior art LED device.Therefore, the two-dimentional FFP of LED device has elliptical shape, and it has first axial dimension and second axial dimension.First size is represented horizontal FFP, and second size is represented vertical FFP.
The screen curve is a kind of optical characteristics of display screen, and it shows the standard luminous intensity ratio of different angle of radiation.For the different colours of light-emitting diode display 200, the screen curve needs closely coupling.Figure 13 (a) shows the horizontal screen curve of the light-emitting diode display of light-emitting diode display 200 and prior art.Figure 13 (b) shows the vertical screen curve of the light-emitting diode display of light-emitting diode display 200 and prior art.Significantly, the horizontal screen curve 260 of disclosed light-emitting diode display is more level and smooth than the horizontal screen curve 262 of the LED device of prior art.Figure 13 (b) shows the vertical screen curve of the light-emitting diode display of disclosed light-emitting diode display and prior art.The vertical screen curve 264 of disclosed light-emitting diode display is more level and smooth than the vertical screen curve 266 of prior art light-emitting diode display.
In some embodiments, light-emitting diode display 200 has less than about 110 ° horizontal view angle θ
1With less than about 60 ° vertical view angle theta
2More preferably, light-emitting diode display 200 has less than about 106 ° horizontal view angle θ
1With less than about 56 ° vertical view angle theta
2Most preferably, light-emitting diode display 200 has less than about 100 ° horizontal view angle θ
1With less than about 50 ° vertical view angle theta
2In other embodiments, light-emitting diode display 200 can have about 90 ° to about 110 ° horizontal view angle θ
1With about 40 ° to about 60 ° vertical view angle theta
2More preferably, light-emitting diode display 200 have about 95 ° to about 106 ° horizontal view angle θ
1With about 45 ° to about 56 ° vertical view angle theta
2Most preferably, light-emitting diode display 200 has about 100 ° horizontal view angle θ
1With about 50 ° vertical view angle theta
2
Figure 14 shows the sketch map according to two dimension " 2D " FFP that is produced by light-emitting diode display 200 of an execution mode of the present disclosure.2D FFP has elliptical shape.This elliptical shape has first size 270 on first direction, on second direction, have second size 280, wherein, first direction basically with the second direction quadrature.In one embodiment, the characteristic of 2D FFP can be the distance " D " between the observation place at light-emitting diode display 200 and given LED device visual angle.In the place of the distance B of range display 200, with 2D * tan (θ
1/ 2) relation is represented first size 270, and with 2D * tan (θ
2/ 2) relation is represented second size 280, wherein, and θ
1Be the level and vertical visual angle of display.The arc measurement distance B along the center, the maximum emission intensity (Iv of its expression display
Max).As stated, the luminous intensity of light-emitting diode display 200 or screen curve are relevant with the luminous intensity of LED device, available expression Iv
Display=Iv
LED/ cos (θ) expression, wherein, θ is the visual angle of display.
According to aforesaid LED device execution mode, when the visual angle of LED device reduces and the corresponding visual angle of display when reducing, first and second sizes 270 and 280 will correspondingly reduce.For example, be under the situation of about 50m at D, in one embodiment, first size 270 is less than about 143m, more preferably less than about 133m, most preferably, less than about 119m.Correspondingly, in one embodiment, second size 280 is less than about 58m, more preferably less than about 53m, most preferably, less than about 47m.Therefore, at the distance B place, the oval-shaped zone of 2D FFP shown in Figure 14 is preferably less than about 6626m
2, more preferably, less than about 5536m
2, most preferably, less than about 4393m
2
According to an embodiment of the present disclosure; For example; At D be about 50m and LED device the horizontal view angle less than about 90 ° and vertically the visual angle less than about 45 ° and corresponding display viewing angles less than about 106 ° and less than about 53 ° situation under, first size 270 with less than the horizontal view angle of the about light-emitting diode display 200 of 133m and corresponding less than the vertical visual angle of about 53mm.
From preceding text, can see that this execution mode provides a kind of LED device that comprises the reflector of elliptical shape, reflector has the bottom surface and tilts also to limit the wall of opening in the top with respect to the bottom surface.The LED that is installed on the bottom surface can be covered by lens at least in part.According to the characteristic of disclosed LED device, the light that sends from the LED device is towards observer's eyes and tilt.In addition, the giant display screen performance that comprises disclosed LED device goes out the light of being wasted of reduction.
Therefore, more than describe in detail and regard illustrative as, and nonrestrictive, and, be appreciated that accompanying claims (comprising all equivalents) is intended to limit spirit of the present disclosure and scope.
Claims (30)
1. LED device comprises:
Lead frame wherein has reflector, and said reflector has rounded bottom surface and wall, and said wall has variable inclination and locates to limit opening in the top with respect to said bottom surface; And
LED is installed on the said bottom surface,
It is characterized in that, said reflector have greater than 0.25mm from the upper end of said wall to the degree of depth of said bottom surface, said reflector has elliptical shape.
2. LED device according to claim 1 is characterized in that said rounded bottom surface has the diameter less than 0.7mm.
3. LED device according to claim 2 is characterized in that said diameter is less than 0.65mm.
4. LED device according to claim 3 is characterized in that the said degree of depth is 0.25mm to 0.40mm.
5. LED device according to claim 1; It is characterized in that; Said opening has oval geometry, its have 0.8mm to 0.9mm along the first size of first axle and 0.7mm to 0.8mm along with second size of second axis of said first axle quadrature.
6. LED device according to claim 5 is characterized in that, said LED is green light LED or blue-ray LED.
7. LED device according to claim 1 is characterized in that said opening has circular geometry, and has the diameter of 0.9mm to 1.1mm.
8. LED device according to claim 7 is characterized in that said LED is a red-light LED.
9. LED device according to claim 1; It is characterized in that; Said opening has oval geometry, said wall limit 40 ° to 60 ° first opening angle and 20 ° to 40 ° with said first opening angle second opening angle of quadrature basically.
10. LED device according to claim 9 is characterized in that, said first opening angle is 45 ° to 55 °, and said second opening angle is 25 ° to 35 °.
11. LED device according to claim 10 is characterized in that, said first opening angle and second opening angle respectively with the far field pattern of said LED device in the horizontal view angle with vertically the visual angle is corresponding.
12. LED device according to claim 1; It is characterized in that said opening has circular geometry, said wall has the vertical part that combines with said bottom surface and said bottom surface and sloping portion are separated; And wherein, said sloping portion limits 50 ° to 70 ° opening angle.
13. LED device according to claim 12 is characterized in that, said opening angle is 55 ° to 65 °.
14. LED device according to claim 1 is characterized in that said lead frame is fabricated from iron.
15. LED device according to claim 1 is characterized in that, further comprises the symmetric lens that covers said lead frame at least in part.
16. LED device according to claim 15 is characterized in that said lens have oval cross section, it has along the first size of first axle with along second size of second axis, and said first size is longer than said second size.
17. LED device according to claim 16 is characterized in that, said first size is less than 4.4mm, and said second size is less than 3.5mm.
18. LED device according to claim 15 is characterized in that, said symmetric lens has the section height of 5.3mm at least.
19. lead frame; Comprise reflector with rounded bottom surface and wall; Said wall has variable inclination and limits opening in the top with respect to said bottom surface; It is characterized in that, said reflector have greater than 0.25mm from the upper end of said wall to the degree of depth of said bottom surface, said reflector has elliptical shape.
20. lead frame according to claim 19 is characterized in that, said rounded bottom surface has the diameter less than 0.7mm.
21. lead frame according to claim 19 is characterized in that, said diameter is less than 0.62mm.
22. lead frame according to claim 19 is characterized in that, the said degree of depth is 0.28mm to 0.36mm.
23. lead frame according to claim 19 is characterized in that, further comprises the LED on the bottom surface that is installed on said reflector.
24. lead frame according to claim 19 is characterized in that, further comprises the LED that sends green glow or blue light that is installed on the said bottom surface, it is characterized in that the said degree of depth is 0.25mm to 0.31mm.
25. lead frame according to claim 19 is characterized in that, further comprises the LED that sends ruddiness that is installed on the said bottom surface, wherein, the said degree of depth is 0.32mm to 0.38mm.
26. a LED device comprises:
Reflector has rounded bottom surface and wall, and said wall has vertical part with respect to said bottom surface and combines with said bottom surface; Said vertical part is separated said bottom surface and sloping portion; It is characterized in that said sloping portion limits opening in the top, said reflector has elliptical shape; And
LED is installed on the said bottom surface.
27. LED device according to claim 26 is characterized in that, said sloping portion limits 50 ° to 70 ° opening angle.
28. LED device according to claim 27 is characterized in that, said sloping portion limits 55 ° to 65 ° opening angle.
29. LED device according to claim 27 is characterized in that the length of said vertical part is less than the length of said sloping portion.
30. LED device according to claim 27 is characterized in that, said reflector have 0.25mm to 0.40mm from the upper end of said sloping portion to the degree of depth of said bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201894304U CN202268380U (en) | 2011-04-13 | 2011-05-27 | Led device and lead frame |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/000648 WO2012139252A1 (en) | 2011-04-13 | 2011-04-13 | Led devices with narrow viewing angle and an led display including same |
| CNPCT/CN2011/000648 | 2011-04-13 | ||
| CN2011201894304U CN202268380U (en) | 2011-04-13 | 2011-05-27 | Led device and lead frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202268380U true CN202268380U (en) | 2012-06-06 |
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ID=46159164
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201894304U Expired - Lifetime CN202268380U (en) | 2011-04-13 | 2011-05-27 | Led device and lead frame |
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| Country | Link |
|---|---|
| CN (1) | CN202268380U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992236A (en) * | 2015-12-02 | 2017-07-28 | 普因特工程有限公司 | Chip substrate |
-
2011
- 2011-05-27 CN CN2011201894304U patent/CN202268380U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992236A (en) * | 2015-12-02 | 2017-07-28 | 普因特工程有限公司 | Chip substrate |
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