CN102956195A - Illumination apparatus - Google Patents
Illumination apparatus Download PDFInfo
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- CN102956195A CN102956195A CN2012103789015A CN201210378901A CN102956195A CN 102956195 A CN102956195 A CN 102956195A CN 2012103789015 A CN2012103789015 A CN 2012103789015A CN 201210378901 A CN201210378901 A CN 201210378901A CN 102956195 A CN102956195 A CN 102956195A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48135—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip
- H01L2224/48137—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being arranged next to each other, e.g. on a common substrate
Abstract
The invention provides na illumination apparatus. To suppress the degradation or the like in sharpness and the debasement of display quality, while reducing the number of light emitting elements to be used. The illumination apparatus includes a plurality of the light emitting elements having different light emission colors, display elements arranged in a matrix, and a driving circuit for driving lighting of the light emitting elements. In the illumination apparatus, the light emitting elements are arranged on each line in a longitudinal or transverse direction so as to include all of three primary colors of light. As a result, the number of the light emitting elements to be used is reduced, and the driving circuit is simplified. In addition, the clear display of the high sharpness suppressed in the degradation of the display quality is made possible.
Description
The application is to be that Dec 18, application number in 2007 are 200710199178.3, invention and created name is dividing an application of light-emitting device the applying date.
Technical field
The present invention relates to possess the light-emitting device of the light-emitting components such as LED or LD, particularly be suitable as literal demonstration etc., strengthen acutance, emphasize the edge and the light-emitting device of the display device that shows.
Background technology
At present, the light-emitting component of the high brightness such as light emitting diode (Light Emitting Diode:LED), laser diode (Laser Diode:LD) is owing to respectively the RGB as trichromatic red (Red), green (Green) of light, blue (Blue) being developed, so can make the full color display of large-scale emissive type.Wherein, light-emitting diode display can be realized light weight, slimming, and has high brightness, the feature such as low in energy consumption, so as at the outdoor giant display that also can use and demand increases sharp.In larger-size large LED display, use more LED, for example in vertical 300 * horizontal 400 situation, use to add up to 120,000 LED group.Along with but so luminous LED in super brightness ground that reaches more than the 1000mcd is developed out, the giant display purposes that can carry out full color or broken colour demonstration that is used for using in the open air.Large view display like this is arranged in the wall of buildings or ball park, the arena or is arranged in the open-air concert and uses.On the other hand, with high-brightness LED as the electric light display board of display message or billboard, bulletin board, electric light to guide plate or as teleseme or illumination with and application etc., the application development in the various aspects.
Such LED display device is that LED that respectively can luminous RGB is closely disposed, utilizes as 1 pixel by colour mixture.Each LED lights in the Timing brightness of hope by drive IC etc., can show by the color that the colour mixture of each LED is wished.In addition, in light-emitting diode display, the display that will be in the housing of resin etc. consists of with a plurality of their driving circuits of LED configuration driven, the LED unit combination that himself can drive is arranged, and will in housing, only dispose the LED bunch of combination of a plurality of LED and consist of, from its display of external drive.For example, by each LED unit and even LED bunch are fixed on the installing frame of the wall of being located at buildings, and then each LED unit and even LED bunch connected with communications connector respectively, thereby can constitute 1 light-emitting diode display.
Example as the light-emitting device that uses a plurality of LED represents light-emitting diode display among Figure 13.This display will make the LED11a of RGB be 1 pixel of one group with rectangular configuration, by On/Off and the luminous quantity of controlling each LED, can display text or image.Particularly, connect the respectively constant-current drive circuit 35 of constant-current driving LED 11a at cathode side.By the row multiple row of such LED is arranged side by side, each anode-side is connected on the power circuit via common driver 2B, the voltage V that is supplied with by power circuit drives.
The configuration example of the LED of each pixel of expression formation light-emitting diode display among Figure 14 and Figure 15.In the example of Figure 14, the LED of RGB3 look is consisted of 1 pixel with the triangle configuration.On the other hand, in the example of Figure 15, the LED of RGB3 look is longitudinally disposed and consist of 1 pixel.In which example, it all is certain value L in length and breadth that the spacing between each pixel makes.In addition, RGB3 LED can adopt as shown in Figure 14 the structure that will closely be configured in according to 3 LED of each encapsulationization of RGB in each pixel or as shown in Figure 15 the led chip of RGB be adjacent to be sealing into 1 structure in the encapsulation.
And then, in the light-emitting diode display of outdoor application, the situation that is fixed with respectively as shown in Figure 16 skylight (louver) 10 above each pixel is arranged.Skylight 10 is also referred to as window shutter etc., is that outer light with the direct sunlight from the sun to light-emitting component etc. covers to prevent from reflecting the reduction of the contrast of bringing or deteriorated and relax the impact of wind and rain and the parts of protecting component.
By display text on such display, can be as utilizations such as road information display boards.Use the road information display board of LED owing to can easily change the literal that will show, and the literal autoluminescence, so have the advantage that driver in the driving also can easily recognize display text.
If make the LED with rectangular configuration become high density, then can carry out fine, high-quality demonstration.But if the quantity of the LED that uses increases, then upper power consumption and the thermal value of cost cost also increase, and are used for controlling the control circuit complicated of lighting of LED.So, carry out LED with matrix configuration and elongate in certain proportion interval (Inter and draw く) the measure (for example patent documentation 1) of pixel structure.
Particularly, expression is elongated the interval with LED and is made the structure example of virtual pixel configuration among Figure 17.Virtual pixel is to be also referred to as that some virtual pixel, times scan control, dynamic pixel control etc., that will consist of pixel elongates the interval and the method that shows.In this embodiment, such as Figure 14 and shown in Figure 15, be the LED that disposes of L from making spacing between pixel, the LED of R, B is elongated interval 1/4, the LED of G is elongated interval 1/2.As a result, shown in dotted line frame among Figure 17, consist of 1 pixel by 4 LED that are configured in the RGBG on each summit on the square with spacing L.In addition, in this embodiment, use the LED of two G in 1 pixel, this is because consider that when white balance adjusting the brightness that the LED to G requires is generally high than R, B.In the situation of such configuration, in Figure 17, use ● the central point of the pixel of expression becomes virtual pixel (false pixel).Spacing between homochromy LED in the case all is 2L in length and breadth.If this structure, then compare with Figure 14, structure shown in Figure 15, because 1 LED of every L configuration, so the use amount of R, B can be reduced to 1/4, the use amount of G is reduced to 1/2.
No. 3313312 communique of [patent documentation 1] Japan special permission
But if LED is elongated the interval, then pixel count reduces, the problem that has display quality, particularly acutance to worsen.In the more message panel of the situation that shows static literal etc., corresponding to the amount of elongating the interval, the marginal portion fogs, and the literal such as Chinese character show that profile becomes not distinct, the tendency that has identification to reduce.Particularly, be used in the situation of road information display board, can not reading characters in the car of high-speed mobile, the reduction of identification becomes larger problem.
Particularly, in the configuration of above-mentioned Figure 17, owing on which direction in length and breadth, all be virtual pixel, so if for example the line of display white then live width broaden.If this has hinted that wanting to carry out meticulous especially literal shows, then might worsen from in-plant identification.And then, in the structure of Figure 17, in all points, use the LED of 1 encapsulation, so compare with the structure of RGB3 led chip of configuration in 1 encapsulation shown in Figure 15, the number of encapsulation is from identical on sum.The cost cutting that therefore, can realize is the price part of led chip.
In addition, in the configuration of Figure 17, in monochrome is lighted, with respect to R, B light with square shape configuration, G becomes grid-like configuration, illuminating state, R, different from illuminating state when the B monochrome is lighted might bring sense of discomfort to the observer.
On the other hand, in the situation of the display that is provided with the skylight, can show no problemly, recognize from the situation of positive identification, but from oblique identification, can produce skylight sometimes and cover the part of pixel and " shadowed layer " occurs, acutance reduces or change, bring the problem of impact to display quality because of the ratio of the configuration mode colour mixture of the LED that consists of pixel.For example, be that R, B light in the situation that literal that (pinkish red (complementary colors of G)) make white lights by background colour, from oblique observation, if " shadowed layer " occurs in G, then the colour mixture rate of the G of white text reduces.As a result, the color of white text shifts to R, B direction, and the literal look similar to background colour, produces the possibility that reads difficult of Word message.Particularly, in the road information display board, for the also easily identification and usually being arranged on the higher position from a distant place, but along with car close to the road information display board, become the situation of looking up identification from oblique below.Under these circumstances, have by the skylight with the part of pixel cover, acutance reduces or the literal look becomes is difficult to carry out difference, literal with the background colour problem of almost illegible that becomes.
Using like this in the light-emitting diode display of virtual pixel, be subject to easily the impact that acutance as described above reduces by reducing the number of LED, becoming.This becomes important reason in the display boards such as literal demonstration.
Summary of the invention
The present invention makes for the such problem that solves in the past.Even an object of the present invention is to provide the display device that a kind of quantity that reduces the light-emitting component that uses also can suppress the reduction of acutance.
Light-emitting device of the present invention possesses: display part, with the rectangular different a plurality of light-emitting components of illuminant colour difference that dispose; Driving circuit is controlled lighting of above-mentioned light-emitting component; It is characterized in that above-mentioned light-emitting component is configured to, so that consistent at the three primary colors of each vertical or horizontal line glazing of above-mentioned matrix.Thus, can reduce use light-emitting component quantity and driving circuit is oversimplified, and can suppress the demonstration of the higher distinctness of the acutance of reduction of display quality.
In addition, the point that also can make the matrix that consists of display part constitutes the actual pixels configuration in any direction in length and breadth, constitutes the virtual pixel configuration in another direction.Thus, the dot spacing of any direction in length and breadth can be made the virtual pixel configuration and reduce the light-emitting component number that uses, and as the actual pixels configuration and keep acutance and suppress whole display quality and reduce, can realize simultaneously that cost cutting and quality keep.In addition, by only on vertical or horizontal, showing with virtual pixel, on the direction that is not virtual pixel, can carry out actual pixels and show.For example in showing, literal can clearly illustrate horizontal edge in the situation showing with virtual pixel longitudinally.Thereby, compare with method in the past, also carry out easily the identification of literal from the such high-speed mobile units such as automobile that travel at super expressway.
And then preferably, each line that disposes at actual pixels disposes light-emitting component, so that it comprises the three primary colors of whole light; Dispose the light-emitting component of any illuminant colour at each line of virtual pixel configuration.
And then, also can be on the direction of the line of actual pixels configuration, between adjacent line with the light-emitting component bias configuration.
And then, driving circuit according to Displaying timer switch trichromatic combination adjacent light-emitting component, that consist of light bunch.Thus, even the light-emitting device of same structure on the hardware, also can be by the setting of change bunch realize demonstration under the actual pixels configuration in the direction of in length and breadth any hope, can according to showing that form be switched the actual pixels configuration and virtual pixel disposes, keep display quality.
On the other hand, another kind of light-emitting device display part, take rectangularly dispose to have red colour system, the 1st light-emitting component of any illuminant colour of green system, blue series, the 2nd light-emitting component, the 3rd light-emitting component as group bunch; Driving circuit is controlled lighting of above-mentioned light-emitting component; It is characterized in that above-mentioned the 1st light-emitting component is configured on the grid point of the matrix that consists of above-mentioned display part; Above-mentioned the 2nd light-emitting component is adjacent with the 3rd light-emitting component, is configured on the grid point of the matrix adjacent with the grid point that disposes above-mentioned the 1st light-emitting component, and these the 1st to the 3rd light-emitting components as one group, are consisted of the pixel of display part.Thus, can be with the 2nd light-emitting component and the 3rd light emitting element storing in the medium and fully closely configuration of encapsulation, and the colour mixture that can carry out with the spacing unit of the point that consists of matrix white etc. shows that the display that can keep fine shows.In addition, when each monochrome of R, G, B is lighted, no matter be that the situation of which color is all carried out grid-like lighting, can be different because of the color illuminating state, so can not bring sense of discomfort to the observer that monochrome is lighted.
In addition, also can be provided with from the outstanding skylight of above-mentioned display part by at least one face around light-emitting component.Thus, can protect light-emitting component not to be subjected to outer influence of light and can improve the contrast of the demonstration in the display part.
And then the 2nd light-emitting component and the 3rd light-emitting component can be with identical posture disposed adjacent in length and breadth any direction of matrix, on each line, and are adjacent to configuration with respect to adjacent line with opposite posture.Thus, the skylight is set then " shadowed layer " occurs from oblique identification the time, the problem in the past of change color occurs because of the luminous intensity distribution angle if can eliminate.Namely, even because " shadowed layer " occurs in the skylight, dispose the 2nd light-emitting component and the 3rd light-emitting component owing to alternately making the counter-rotating of configuration pattern, suppress change color so " shadowed layer " is distributed in the 2nd light-emitting component, the 3rd light-emitting component, can suppress the deterioration etc. of the identification of Word message.
And then, in light-emitting component, preferably use light emitting diode.
In addition, can be with light-emitting device preferably as the word-information display display.Thus, can realize road information display board etc., be suitable for the luminous display unit that literal shows.
And then, also can be with two arrangements of components in the trichromatic light-emitting component of formation light, that illuminant colour is different in an encapsulation.Thus, by two LED being accommodated in 1 encapsulation etc., make structure that their are fully approached, can with the line of the thinner colour mixtures such as live width performance white, can carry out very high-precision demonstration.
Description of drawings
Fig. 1 is the block diagram of the light-emitting device of expression embodiments of the present invention 1.
Fig. 2 is the synoptic diagram of the configuration pattern of the light-emitting component in the expression display part.
Fig. 3 is the synoptic diagram of configuration example of the LED encapsulation of the expression configuration pattern of realizing Fig. 2.
Fig. 4 is illustrated in the stereographic map of having taken in the LED element of two led chips in the encapsulation.
Fig. 5 is the synoptic diagram of 16 * 16 display part of the light-emitting diode display of expression past case.
Fig. 6 is the synoptic diagram of 16 * 16 display part of the light-emitting diode display of expression embodiment 1.
Fig. 7 is the synoptic diagram that is illustrated in the situation of transversely carrying out the virtual pixel demonstration.
Fig. 8 is the synoptic diagram that carries out the situation of virtual pixel demonstration on being illustrated in vertically.
Fig. 9 is the synoptic diagram of display part of the light-emitting device that possesses the skylight of expression embodiment 2.
Figure 10 is that to be illustrated in the configuration pattern of Fig. 3, to make background colour be magenta and LED when showing white line in the horizontal lights the synoptic diagram of pattern.
Figure 11 is the synoptic diagram of the expression pattern that the LED of Fig. 9 is interconnected.
Figure 12 is that to be illustrated in the configuration pattern of Figure 11, to make background colour be magenta and LED when showing white line in the horizontal lights the synoptic diagram of pattern.
Figure 13 is the block diagram that represents an example of light-emitting diode display in the past.
Figure 14 is the synoptic diagram of configuration example of the LED of expression each pixel of consisting of light-emitting diode display in the past.
Figure 15 is the synoptic diagram of another configuration example of the LED of expression each pixel of consisting of light-emitting diode display in the past.
Figure 16 is the stereographic map that expression is provided with the light-emitting diode display in skylight.
To be expression elongate LED the synoptic diagram of the configuration behind the interval from the past light-emitting diode display to Figure 17.
Figure 18 is that the expression driving circuit is by the synoptic diagram of the situation of the structure of every frame switching pixel.
Figure 19 is the time diagram of timing of the structure of the expression pixel of switching Figure 18.
Embodiment
Below, based on the description of drawings embodiments of the present invention.But embodiment illustration shown below is used for light-emitting device that technological thought of the present invention is specialized, the present invention not with light-emitting device specific be following structure.And then this instructions will be given to corresponding to the label of the parts shown in the embodiment parts shown in claims and the summary of the invention for claims are understood easily.But, anything but with the parts shown in claims specific be the parts of embodiment.Particularly, the size of the described structure member of embodiment, material, shape, its relative configuration etc. are not the meanings that scope of the present invention only is defined in this just as long as no especially specifically record, only simple illustrative examples.In addition, the size and location relation of each parts shown in the drawings etc. has in order to make explanation become clear and definite and situation that exaggerate.And then, in the following description, represent the parts of identical or homogeneity suitably to omit detailed explanation for identical title, label.And then consisting of each key element of the present invention both can be the form that a plurality of key elements is also used as a plurality of key elements with identical parts formation by parts, also can share the function that realizes parts by a plurality of parts on the contrary.
(embodiment 1)
Fig. 1 represents the block diagram of the light-emitting device 100 of embodiments of the present invention 1.Light-emitting device 100 shown in this figure possesses: display part 1, with a plurality of LED as light-emitting component with m capable * the rectangular arrangement of n row (m, n are the integers more than 1) forms; The 2(of horizontal drive section common driver), to each row of display part 1, on one side in situation about dynamically lighting, select its each row to apply electric current based on the public address signal on one side; Vertical drive section 3 carries out and the communicating by letter of peripheral control unit etc., be to display part 1 each row, based on the driving circuit of supplying with drive currents corresponding to the image data of selected each row, via a plurality of electric current supplying wires.Horizontal drive section 2 and vertical drive section 3 are as the driving circuit performance function of lighting of the light-emitting component that drives display part 1.In the present embodiment, based on the data that write by data shift clock mechanical brake, as trigger, carry out lighting of the LED that selected by public address with blank signal with the time quantum that is determined by the grade reference clock.
(display part 1)
Display part be formed with on the substrate of conductive pattern with m capable * n row rectangular be arranged with by a plurality of light-emitting components consist of 1 pixel bunch.In light-emitting component, use semiconductor light-emitting elements or EL, the PDP etc. of LED, LD etc.Semiconductor light-emitting elements has the advantage that output is good with respect to good, the efficient of authenticity of input, can stably use with the long-life.In embodiment 1, use LED.LED compares the worry that does not have bulb cracked with bulb etc., is preferred from the aspect of permanance and cost.Configuration example for LED bunch is narrated in the back.In this embodiment, by respectively with 3 units adjacent be equipped with can luminous red, green, blue (R, G, B) LED bunch of each LED consist of a pixel.For each pixel each, make the adjacent LED of RGB can realize that full color shows.In addition, the three primary colors of light generally refer to above-mentioned R, G, B, but also can utilize CMY system or CMYK system.
The semiconductor light-emitting elements such as LED preferably use by liquid-phase growth method, HDVPE method or mocvd method and formed the semiconductor structures such as ZnS, SiC, GaN, GaP, InN, AlN, ZnSe, GaAsP, GaAlAs, InGaN, GaAlN, AlInGaP, AlInGaN as luminescent layer on substrates.The selection of material and mixed crystal degree thereof by semiconductor layer can be selected the emission wavelength of various semiconductor light-emitting elements from the ultraviolet light to the infrared light.Particularly, even when making the display device that also can suitably use in the open air, the light-emitting component that requirement can high brightness luminescent.So, as the material of the luminous light-emitting component of the high brightness of green system and blue series, preferably select nitride-based semiconductor.For example, as the material of luminescent layer, can use In
XAl
YGa
1-X-YN(0≤X≤1,0≤Y≤1, X+Y≤1) etc.In addition, also can make with such light-emitting component with by its light excitation, send the light-emitting component that the various fluorophor of the light with wavelength different from the emission wavelength of light-emitting component combine.As the material of the luminous light-emitting component of red colour system, preferably select semiconductor or the aluminium-indium-gallium-Phosphorus semiconductor of gallium-aluminium-arsenic class.In addition, in order to make colour display device, preferably with the emission wavelength of red colour system from 610nm to 700nm, green from 495nm to 565nm, the blue led chip combination of emission wavelength from 430nm to 490nm.
Light-emitting component is electrically connected with lead-in wire electrode to this light-emitting component supply capability, makes LED by using to cover from the seal member of outer protection light-emitting component.Light-emitting component has preferably used on the growth substrate epitaxial growth semiconductor light-emitting elements of semiconductor layer.Growth substrate can use known materials such as sapphire, spinel, SiC, GaN, GaAs.In addition, also can not the such insulativity substrate of sapphire, and by using the conductive boards such as SiC, GaN, GaAs, p electrode and n electrode contraposition ground being disposed.
In addition, as required, also can around light-emitting component, dispose the light wavelength of wavelength conversion parts, conversion light-emitting component, the light that is transformed to different wavelength and output.The wavelength conversion parts are to send the parts that the fluorophor of fluorescence forms by sneaking in translucent resin for example by the light stimulus of light-emitting component.Thus, the light of light-emitting component can be transformed to long wavelength more light, be fetched into the outside with the light of light-emitting component with by the mixed light of the light of the long wavelength after the conversion of wavelength conversion parts.
And then LED can use the LED of various shapes.For example, can enumerate and utilize the led chip make as light-emitting component to be electrically connected with conducting terminal and by the form of the bullet cut of the coverings such as molded resin or chip-type LED, light-emitting component itself etc.
(horizontal drive section 2)
As the common control unit of horizontal drive section 2 based on the public address signal of supplying with from peripheral control unit, controlled via lsb decoder 2a.Based on the data that received by Department of Communication Force 9 and grade reference clock control current drive unit 34.
(vertical drive section 3)
More particularly, current drive unit 35 comprises the constant-current drive circuit corresponding to light emitting device group.Each constant-current drive circuit is also used as constant current and drives the constant-current circuit of light-emitting component and the control circuit by control energising amounts such as switches.Possesses suitably controlled circuit as constant-current circuit.
The drive current that is fed into the concentric line in the display part 1 is provided in a side of that current drive unit 34 in the vertical drive section 3 supplies with.Make the public address signal and to light control signal synchronous, from demoder 2a synchronous control signal is input to the horizontal drive section 2, will be connected with power supply by the concentric line of this control signal selection.Corresponding to this, supply with drive current from the current drive unit 34 of vertical drive section 3.Switch successively according to each row of display part 1 by horizontal drive section 2 and to light.
In addition, light-emitting device of the present invention is not limited to show the image display devices such as display of the reflections such as rest image, moving image.In this manual, so-called light-emitting device except the display board of the text message such as display text, numeral on the display part, also comprises the lighting device that display part can be regulated illuminant colour and luminous quantity as light source.Particularly, the LED that the present invention passes through to use high brightness can be applied in the illumination that can control illumination look and brightness etc. as light-emitting component, no matter the title of invention how, does not show that the lighting device of image also means in the scope of the present invention.The intelligent lighting that for example, controller and sensor can be connected, can carry out the adjusting of luminous On/Off, light quantity and illuminant colour.Particularly, can consist of lighting device by light-emitting device is linked with cell-like, can freely change according to the place is set the configuration pattern of light-emitting device etc.In addition, in this manual, so-called control data refer to view data, brightness correction data, constant flow regulation data, enable control, horizontal synchronization data etc., light needed various data in as image demonstration or the situations of using and using of throwing light on.In this manual, for the convenient data that sometimes also singly are called.In addition, the data that shown by light-emitting device might not be limited to the view data of full color, also can use in the demonstration of losing lustre such as 16 looks, 8 looks etc. or grade performance etc.And then, being not only image, in the demonstration of literal, graph data, also can utilize.Perhaps, in the situation that light-emitting device is used as illumination, can make the change of rank of illumination intensity etc., add brightness adjustment control.
(the configuration pattern of light-emitting component)
The configuration pattern of the light-emitting component 11 of expression display part 1 among Fig. 2.As shown in the drawing, the LED of configuration RGB in each row, and and the LED of adjacent row between consist of 1 pixel.Here, go up in the row direction the adjacent LED configuration that offsets with respect to each, by the LED(of 1 n row R for example) and the LED(of two n+1 row for example G and B) consist of a pixel.Thus, can in the quantity that reduces the light-emitting component that uses, suppress the reduction of display quality.
Namely, in the past such as Figure 14 and shown in Figure 15, in the light-emitting diode display 300,400 that carries out high-quality demonstration, to each pixel arrangement the LED11a of RGB, so establishing in the situation that pel spacing is L, in 1 stall MS of L * L, respectively comprising respectively the LED11a of 4 RGB.On the other hand, as shown in figure 17, in the situation of the light-emitting diode display 500 of making the virtual pixel configuration from each pixel elongation interval LED, owing to will be configured in LED11a on four jiaos of 1 stall MS only as 1, if be L so establish the disposition interval of each LED11a, then compare with the example of Figure 14 etc., the number of the LED of use can be reduced to R, B 1/4, G is reduced to 1/2.But in this configuration, owing to show by virtual pixel, acutance reduces.This hint requires at literal etc. that display quality can reduce in the demonstration of acutance.
So, in the present embodiment, as shown in Figure 2, for laterally, similarly carry out the virtual pixel configuration with spacing 2L with Figure 17, and for vertically, with the spacing configuration actual pixels of L.If compare with the structure of Figure 17, all is the structure that two LED are positioned at the scope of 2L laterally then, be identical, but in vertically, be two with respect to Figure 17 LED in the scope of 2L, increase to 3.Thereby the use amount of LED is compared with Figure 17 and is become 3/2 times, but can correspondingly suppress the reduction of display quality.More particularly, if be conceived to the upper left pixel of Fig. 2, then the LED bias configuration of R is on the centre position adjacent to the LED of G, the B of right neighbour's row.The center of the pixel that is made of these RGB becomes among Fig. 2 ● shown in the position, so display quality reduces although become in the horizontal that virtual pixel shows, for vertically owing to be that the actual pixels of spacing L shows, so can carry out meticulousr demonstration.
And then by the LED of configuration RGB in each row, the colour mixture (for example vertical white line shows) on vertically can show with the level of dot spacing.Certainly, also can will vertically with laterally replace.Like this, to show, make another direction with virtual pixel on vertical or horizontal be the structure that actual pixels shows by only making, and can guarantee to be suitable for the display quality of literal demonstration etc.For example, showing with virtual pixel longitudinally in the situation, in literal shows, traversing horizontal clear-cut margin ground is shown.Thus, in the purposes that the such acutance that requires profile of Chinese character shows, be effective.Particularly, observe in such purposes in the car from movement like that at the road display board, it is very important improving acutance and literal is recognized easily.And, owing to be not merely to make high-precision demonstration, and can increase the elongation space-number of LED and reduce the LED number that needs for a direction, so can obtain realizing simultaneously the reduction of manufacturing cost and the advantage of keeping of the display quality that needs.
LED also can use the type that is equipped with a led chip in an encapsulation, but also the LED of adjacent different illuminant colour can be consisted of with an encapsulation.Particularly, as shown in Figure 3, by being G, B in this embodiment with adjacent LED11a() consist of, be accommodated in the LED encapsulation 10 with led chip, thereby with use two independently the situation of LED element compare and can reduce cost, and can be conducive to simplification and the miniaturization of installation procedure.Be illustrated in the example of taking in the LED element of two LED11a in the such LED encapsulation 10 among Fig. 4.By in an encapsulation, carrying so a plurality of led chips, can with sharings such as electrode and sealing resins, can reduce cost.In the example of Fig. 3, by only being encapsulated as the unit display surface that one GB-LED10gb consists of display part 1 with the R-LED10r of the led chip of R encapsulation with the led chip of G, B, if compare with structure in the past shown in Figure 14, then the number of led chip can both be reduced to 1/2 for which of RGB.
And then, be reduced to 1/2 by the number with led chip, can make the driving element of the driving circuit that drives each LED also become half.For example, as past case, in 16 * 16 such display part 301 of Fig. 5, in the situation of the LED encapsulation 10rgb that uses at the led chip that disposes respectively RGB on the each point, if establishing the duty ratio of dynamic driving is 1/8, then driving circuit needs respectively 32ch for each color of RGB.On the other hand, in application implementation mode 1 and in the situation of such 16 * 16 the display part 1 of pie graph 6, because by adjacent pixel of two LED10r, 10gb formations, so become in fact or 16 * 8 points at 8 * 16.Thus, as long as driving circuit has 16ch just enough for each color of RGB, the advantage that can obtain reducing required memory span etc., circuit structure is oversimplified.
And then, in this structure, LED adjacent on above-below direction is approached, can be close on the identical straight line of the LED adjacent with the left and right sides, colour mixture also improves.Thus, improve horizontal colour mixture (for example horizontal white line shows), in actual pixels shows, can carry out the detailed demonstration under the LED disposition interval L width.
In addition, in the configuration of Fig. 2 etc., at R, G, when each monochrome of B is lighted, in the situation of which color, all become the pattern of lighting of grid-like or diamond shaped.Elongate in the arranged spaced in the past LED, as shown in figure 17, because R, B are that chessboard trellis or quadrilateral shape, G are grid-like or diamond shaped, so the demonstration of R, B when monochrome is lighted and the problem that can observe different from the demonstration of G arranged.With respect to this, in configuration shown in Figure 2, owing to R, G, all color configuration of B are grid-like, thus can be different because of the color illuminating state, can also obtain can not bringing the advantage of sense of discomfort to the observer that monochrome is lighted.
In addition, the disposition interval of LED is made as L in the horizontal in the example of Fig. 2, is made as in the vertical (2/3) L.But, be not limited to this example, spacing setting longitudinally must can certainly be grown or be identical with spacing setting in length and breadth.
In the example of above-mentioned Fig. 2, Fig. 3 etc., the situation that consists of a pixel by the LED of adjacent in the horizontal R and GB has been described.In the case, virtual pixel forms in the horizontal.But, also can use the display part of identical configuration, form virtual pixel in the vertical.Based on Fig. 7 and Fig. 8 this situation is described.In Fig. 7, consist of a pixel by transversely adjacent LED10r, 10gb as described above.Pixel is determined by the driving circuit of lighting of each LED of control.For example, also can as shown in phantom in Figure 7 pixel 1, pixel 3 consist of like that a pixel, also can as crossing over these pixels 1,3 pixel 2, consist of a pixel, by driving circuit control, be presented on each LED with the total of the grade that will be shown by each pixel.In addition, also can be that driving circuit control is lighted in order to can change the appointment of pixel with frame unit in speed shows.In the case, in certain frame with pixel 1,3, in next frame, pixel 2 switched as pixel respectively and lights control.In which kind of situation, laterally all be that virtual pixel shows, vertically for actual pixels shows, can show in detail in the vertical.Illustrate that based on Figure 18 and Figure 19 such driving circuit is according to an example of the situation of the structure of every frame switching pixel.In the display part 1 shown in Figure 18 (a), be divided into the pixel 11,13,21,23,31 that is illustrated by the broken lines, group G1(Figure 18 (b) of 33) and by the pixel 12,14,22,24,32 of single-point line expression, group G2(Figure 18 (c) of 34), they are alternately switched according to every frame.Particularly, shown in the time diagram of Figure 19, in the speed of each blank signal (BLANK) switch frame shows, about the pixel that in each frame, shows, with the group G1 of Figure 18 (b) with frame 1, the odd-numbered frame such as 3, the group G2 of Figure 18 (c) is shown with even frame such as frames 2.Thus, can be implemented in the virtual pixel that transversely switches pixel and show shows.
On the other hand, as shown in Figure 8, also can consist of a pixel by adjacent in the vertical LED10r, 10gb.In the case, opposite with above-mentioned Fig. 7, vertically become virtual pixel and show, laterally become actual pixels and show that it is high-quality that horizontal demonstration is become.In addition, in the case, also as shown in phantom in Figure 8, can similarly use pixel 1,3 such pixels acquisition mode, cross over them and with pixel 2 as the acquisition mode of pixel, the control method of demonstration.
Which that these are vertical, horizontal is made as virtual pixel and shows, can easily switch by selected LED to light control by driving circuit.The combined method of a pixel can not exist with ... the mode of the bright common driver of dynamic point and carry out, according to the setting party of unit to and displaying contents, can take the virtual pixel structure in any direction in length and breadth.For example, in the situation that makes the preferential demonstration of horizontal exploring degree, select vertical virtual pixel structure.Like this, according to the literal that shows or the form of figure, can set virtual pixel in suitable direction and show.
In addition, display part is being consisted of, a plurality of unit are being linked and consisting of in the situation of larger display part with cell-like, no matter also can obtain the advantage how the configuration direction of unit can both at random set the direction of virtual pixel demonstration.Particularly, make and to grow crosswise or 16 * 48 unit for example, the unit of the dot structure of lengthwise, for the restriction of the size that meets display system etc., it is made as vertically and when using, on that direction in length and breadth, can both sets virtual pixel at needs.
(embodiment 2)
And then neighbouring LED also can not be made as the configuration under the identical posture, and every an oppositely configuration.It is effective that " interconnected " like this is provided with in LED in the structure in skylight 20 for " shadowed layer ".The configuration example of the display part 201 of the light-emitting device 200 of the relevant embodiment 2 of expression among Fig. 9.The light-emitting device 200 of this figure prolongs in the horizontal and is provided with the skylight 20 of eaves shape above with the LED of rectangular configuration.In this embodiment, the skylight 20 of growing crosswise is fixing at certain intervals in the vertical.Be not limited to this structure, also can the skylight be set individually to each pixel.By such skylight is set, can physically protects the LED element not affected by direct light or wind and rain, and can reduce the reflection of evening glow etc. and improve contrast.
On the other hand, in the situation of the display part 201 that is provided with skylight 20 from top view, skylight 20 can not become obstacle, if but from oblique beneath, then the LED of 20 tops, skylight is blocked by skylight 20, and generation can not be observed a part of light-emitting component, so-called " shadowed layer " that consists of pixel.Particularly, in the pinnacled light-emitting device of the such configuration of road information display board, along with the direction of observation inclination that becomes close to light-emitting device, " shadowed layer " becomes large.Block if will consist of a part of LED of pixel by " shadowed layer ", then according to showing that look might be able to not correctly show.For example, in the LED of Fig. 3 configuration, research is established background colour and is magenta, shows the example of white line in the horizontal based on Figure 10.Here, in order to illustrate, only show the LED that lights in Figure 10, the LED that is blocked by " shadowed layer " does not illustrate.In addition, the width of white line is the amount of two pixels.In order to obtain the background colour of magenta, as Figure 10 (a), make the LED of R, B luminous in the background parts, white line partly makes R, G, B light.Under this state, if because " shadowed layer " occurs in skylight 20, then be configured in skylight 20 directly over LED, be that the LED of the G that is arranged in downside among the adjacent LED is blocked in all positions, it is such to become Figure 10 (b).Under this state, can not observe the light of the LED of G, the result lacks G in white line part, the result becomes magenta and is observed, and becomes the color identical with background colour, become can not identification state.
So, such as Fig. 9 and shown in Figure 11, by LED adjacent on the above-below direction is disposed towards ground on the contrary every 1, can alleviate the problem of LED uniformly being blocked because of " shadowed layer ".That is, based on Figure 12 research in said structure with the example of Figure 10 example of display white on the background of magenta similarly.At this moment, shown in Figure 12 (a), in background parts, R, B are lighted, in the white line part, R, G, B are lighted.Under this state, if because " shadowed layer " occurs in skylight 20, although then skylight 20 directly over LED be blocked, but shown in Figure 12 (b), since with the LED of G, B be configured to make its alternately become up and down on the contrary towards, although so the LED of G is blocked in a row (top of white line among Figure 12), be blocked at the LED of another row (below of Fig. 1) B.As a result, G is not blocked in all pixels, can display line, also distinguish than Figure 10 is easy with the difference of background colour.
More than, selected specific example in order to illustrate, but same situation is suitable for also in general demonstration.That is, if in the LED of Figure 11 (a) configuration pattern " shadowed layer " occurs, it is such then to become Figure 11 (b), produces for the LED of B, LED for G in pixel b in pixel a.Thus, in Figure 11 (b), the brightness of B, G is compared with Figure 11 (a) relatively and to be reduced, if but the degree of its reduction is average then can think the reduction of same ratio in display part 201 integral body.In addition, " shadowed layer " also occurs in the LED for the R of independent configuration.If its degree is with the pixel a contrast of Figure 11 (a), Figure 11 (b), then because the horizontal level of the LED of R is positioned at the roughly middle of G, B, so more shallow but than the LED of G deeply " shadowed layer " than the LED of B, so the similarly brightness of LED that can judge as a whole with G, B reduces.As a result, although because of the generation display part 201 of " shadowed layer " on the whole brightness reduce because the degree of its reduction is certain in RGB, so identification as a whole can not reduce.Like this, interconnected by adjacent LED is made as, the also advantage that worsens of identification fewer, that can not make Word message etc. of " shadowed layer ", change color has occured even can access from oblique observe the time etc.Thereby, even in the situation the light-emitting diode display that will be provided with the skylight is arranged on road as the word-information display plate above, also can alleviate the current automobile of this road come display board below the time, the identification that reads below tiltedly during the information of reading characters message panel reduces.
More than, according to the present invention, the number of cutting down LED and be accompanied by its LED driving arrangement class number, make simplify the structure, reduce manufacturing cost in, to show, make the opposing party be that actual pixels shows by only carrying out virtual pixel in length and breadth either party, can suppress the reduction of display quality, particularly can realize at an easy rate being suitable for the light-emitting device of the demonstration of Word message.In addition, in the light-emitting device with the skylight, also can access the advantage of the degradation of the display quality in the time of can improving from oblique the observation.
Industrial applicibility
Light-emitting device of the present invention preferably is applied in the road information that has used LED and shows with in the display etc.
Claims (9)
1. light-emitting device possesses:
Display part is with the rectangular different a plurality of light-emitting components of illuminant colour difference that dispose; With
Driving circuit is controlled lighting of above-mentioned light-emitting component;
It is characterized in that,
Above-mentioned display part forms, a pixel that the three primary colors of light is all comprised take adjacent above-mentioned a plurality of light-emitting components as one group of formation,
Above-mentioned light-emitting component is configured to, so that on each vertical or horizontal line of above-mentioned matrix, the three primary colors of light are all comprised,
The point that consists of the matrix of above-mentioned display part constitutes the actual pixels configuration in length and breadth any direction, constitutes the virtual pixel configuration in another direction,
Be configured to light-emitting component at each line of actual pixels configuration the three primary colors of light all comprised,
Dispose the light-emitting component of any illuminant colour at each line of virtual pixel configuration.
2. light-emitting device as claimed in claim 1 is characterized in that,
On the direction of the line that actual pixels disposes, light-emitting component bias configuration between adjacent line.
3. light-emitting device as claimed in claim 1 is characterized in that,
Above-mentioned driving circuit according to Displaying timer switch trichromatic combination adjacent light-emitting component, that consist of light bunch.
4. light-emitting device as claimed in claim 1 is characterized in that,
Above-mentioned display part, take rectangularly dispose to have red colour system, the 1st light-emitting component of any illuminant colour of green system, blue series, the 2nd light-emitting component, the 3rd light-emitting component as group bunch;
Above-mentioned the 1st light-emitting component is configured on the grid point of the matrix that consists of above-mentioned display part;
Above-mentioned the 2nd light-emitting component is adjacent with the 3rd light-emitting component, is configured on the grid point of the matrix adjacent with the grid point that disposes above-mentioned the 1st light-emitting component, and these the 1st to the 3rd light-emitting components as one group, are consisted of the pixel of display part.
5. light-emitting device as claimed in claim 1 is characterized in that,
At least one face around light-emitting component is provided with from the outstanding skylight of above-mentioned display part.
6. light-emitting device as claimed in claim 1 is characterized in that,
Above-mentioned display part, take rectangularly dispose to have red colour system, the 1st light-emitting component of any illuminant colour of green system, blue series, the 2nd light-emitting component, the 3rd light-emitting component as group bunch;
Above-mentioned the 1st light-emitting component is configured on the grid point of the matrix that consists of above-mentioned display part;
Above-mentioned the 2nd light-emitting component and the 3rd light-emitting component with identical posture disposed adjacent, and are adjacent to configuration with respect to adjacent line with opposite posture in length and breadth any direction of matrix, on each line.
7. light-emitting device as claimed in claim 1 is characterized in that,
Above-mentioned light-emitting component is light emitting diode.
8. light-emitting device as claimed in claim 1 is characterized in that,
Above-mentioned light-emitting device is the word-information display display.
9. light-emitting device as claimed in claim 1 is characterized in that,
Two light-emitting components in the trichromatic light-emitting component of formation light, that illuminant colour is different are configured in the encapsulation.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2006340966A JP5303834B2 (en) | 2006-12-19 | 2006-12-19 | Light emitting device |
| JP2006-340966 | 2006-12-19 |
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| CN200710199178.3A Division CN101206834B (en) | 2006-12-19 | 2007-12-18 | Luminescent device |
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| CN102956195A true CN102956195A (en) | 2013-03-06 |
| CN102956195B CN102956195B (en) | 2015-03-11 |
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| CN201210378901.5A Active CN102956195B (en) | 2006-12-19 | 2007-12-18 | Illumination apparatus |
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| CN200710199178.3A Active CN101206834B (en) | 2006-12-19 | 2007-12-18 | Luminescent device |
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| JP (1) | JP5303834B2 (en) |
| CN (2) | CN101206834B (en) |
| HK (1) | HK1183149A1 (en) |
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Also Published As
| Publication number | Publication date |
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| HK1183149A1 (en) | 2013-12-13 |
| CN102956195B (en) | 2015-03-11 |
| TWI455084B (en) | 2014-10-01 |
| JP5303834B2 (en) | 2013-10-02 |
| TW200901116A (en) | 2009-01-01 |
| JP2008152080A (en) | 2008-07-03 |
| CN101206834A (en) | 2008-06-25 |
| CN101206834B (en) | 2012-11-14 |
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