CN103325814A - OLED pixel and display panel using same - Google Patents
OLED pixel and display panel using same Download PDFInfo
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- CN103325814A CN103325814A CN2013102049145A CN201310204914A CN103325814A CN 103325814 A CN103325814 A CN 103325814A CN 2013102049145 A CN2013102049145 A CN 2013102049145A CN 201310204914 A CN201310204914 A CN 201310204914A CN 103325814 A CN103325814 A CN 103325814A
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Abstract
The invention provides an OLED pixel and a display panel using the same. The OLED pixel comprises three sub-pixel groups. Each sub-pixel group comprises a first sub-pixel and a second sub-pixel, wherein the first sub-pixel and the second sub-pixel share one driving circuit, and the light emitting waveband of the first sub-pixel and the light emitting waveband of the second sub-pixel are complementary. The sum of the light emitting wavebands of the first sub-pixels of the sub-pixel groups is a white light waveband. According to the OLED pixel and the display panel using the same, the sub-pixels are formed by means of the principle of diffraction of light and the combination of white light OLED light emitting bodies, beam splitting pieces and light barriers. Due to the fact that the six kinds of sub-pixels all adopt the white light OLED light emitting bodies, the problem of chromatic aberration caused by different aging degrees of different materials is avoided. Due to the fact that three kinds of sub-pixels are additionally arranged to assist imaging processing, luminous efficiency of the OLED pixel is improved and power consumption is reduced. Due to the fact that the two sub-pixels of each sub-pixel group share one driving circuit, the distinguishability of the OLED display panel is improved.
Description
Technical field
The invention belongs to semiconductor applications, relate to a kind of OLED(Organic Light Emitting Diode) colored implementation, particularly relate to a kind of OLED pixel and use the display floater of this OLED pixel.
Background technology
Organic electric exciting light-emitting diode (Organic Light-Emitting Diode, OLED) because possess simultaneously self-luminous, do not need that backlight, low-power consumption, contrast are high, thin thickness, the visual angle is wide, reaction speed is fast, can be used for the flexibility panel, the serviceability temperature scope extensively, the characteristic of the excellence such as structure and processing procedure be simpler, and be subject to extensive concern, and be applied to the fields such as flat panel display.
The method that traditional OLED adopts when realizing the demonstration of coloured image mainly contains three kinds:
1. realize the luminous of three kinds of colors of RGB with different luminescent materials, but, the shortcoming of this mode is that luminescent material must be optimized for different colors, and the luminescent layer of different materials is variant on useful life, and different degree of agings is so that the Show Color distortion;
2. then the use white luminescent material adds that filter produces the light of three kinds of colors of RGB, and still, the shortcoming of this mode is that energy utilization efficiency is low, arrives 30%-50% through the light energy losses behind the filter;
3. then use blue emitting material produces the light of three kinds of colors of RGB by the color conversion medium, but, the shortcoming of this mode and the 1st kind of method are similar, exist equally the life problems of color conversion medium and need stable blue emitting material.
Therefore, when improving luminous efficiency, can eliminate again because the problem of the cross-color that the life-span difference of different luminescent materials, different colours transition material is brought is needed solution badly.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of OLED pixel and use the display floater of this OLED pixel, be used for solving prior art because the problem of the cross-color that the life-span difference of different luminescent materials, different colours transition material is brought also is used for solving the lower problem of prior art luminous efficiency simultaneously.
Reach for achieving the above object other relevant purposes, the invention provides a kind of OLED pixel, described OLED pixel comprises at least: the first inferior pixel group, Sanya pixel group and first and Sanya pixel group between the second inferior pixel group; Each inferior pixel group comprises the first inferior pixel and the second inferior pixel that shares one drive circuit; In each inferior pixel group, the first inferior pixel and the second inferior pixel include white light OLED luminous element, light splitting piece and light barrier, so that the luminous wave band summation of the described first inferior pixel and the second inferior pixel is the white light wave band; The luminous wave band summation of the first inferior pixel in respectively should Asia pixel group is the white light wave band; Have enough distances between respectively should the Asia pixel and enter the light splitting piece of adjacent inferior pixel to prevent the output light of inferior pixel, avoid causing crosstalking between the adjacent inferior pixel.
Alternatively, in each inferior pixel group, the first inferior pixel and the corresponding identical wave band of the second inferior pixel light splitting piece separately, and be relative complementary relationship by the position of adjusting light barrier in described first, second inferior pixel, described light splitting piece and light barrier are cooperatively interacted, realize that the luminous wave band summation of the described first inferior pixel and the second inferior pixel is the white light wave band.Alternatively,
Alternatively, the first inferior pixel of the described first inferior pixel group is the inferior pixel of R, and the second inferior pixel of the described first inferior pixel group is the inferior pixel of C; The first inferior pixel of the described second inferior pixel group is the inferior pixel of G, and the second inferior pixel of the described second inferior pixel group is the inferior pixel of M; The first inferior pixel of described Sanya pixel group is the inferior pixel of B, and the second inferior pixel of described Sanya pixel group is the inferior pixel of Y; Wherein, the inferior pixel of R is the inferior pixel of ruddiness, and the inferior pixel of G is the inferior pixel of green glow, and the inferior pixel of B is the inferior pixel of blue light, and the inferior pixel of C is the inferior pixel of cyan light, and the inferior pixel of M is the inferior pixel of pinkish red coloured light, and the inferior pixel of Y is the inferior pixel of sodium yellow.
Alternatively, size that respectively should Asia pixel group equates.
Alternatively, the first inferior pixel in each inferior pixel group and the second inferior pixel dimension equate.
Alternatively, corresponding white light OLED luminous element size equates in the first inferior pixel in each inferior pixel group and the second inferior pixel.
Alternatively, corresponding described light splitting piece is trapezoidal in each inferior pixel group.
Alternatively, described light splitting piece is isosceles trapezoid.
Alternatively, the material of described light splitting piece is the silicon nitride transparent material.
The present invention also provides a kind of OLED display floater, and described OLED display floater comprises at least:
A plurality of OLED pixels;
Select line in many groups, extend along first direction, respectively each inferior pixel group of this OLED pixel is selected line in the corresponding group respectively, select line to be connected to respectively each the self-corresponding drive circuit of each inferior pixel group in the OLED pixel in every group, be communicated with the first inferior pixel or the second inferior pixel in each inferior pixel group by selecting the described drive circuit of line traffic control in described group;
Many data wires, extend along first direction, respectively each inferior pixel group of this OLED pixel is distinguished corresponding data wire, every data wire is connected to respectively each each self-corresponding drive circuit of inferior pixel group in the OLED pixel, and is should the Asia pixel luminous to drive respectively to signal corresponding to the first inferior pixel in each inferior pixel group or the second inferior pixel transmission luminous intensity by described data wire;
Many horizontal scanning lines, extend along the second direction that is different from first direction, a plurality of OLED pixels that are positioned on the second direction share a horizontal scanning line, described horizontal scanning line all is connected to each each self-corresponding drive circuit of inferior pixel group in the OLED pixel, by the signal on each self-corresponding data wire of respectively should Asia pixel group whether receiving simultaneously of described horizontal scanning line control OLED pixel.
Alternatively, the signal of described transmission luminous intensity is voltage, electric current or digit pulse control signal.
As mentioned above, a kind of OLED pixel of the present invention and use the display floater of this OLED pixel has following beneficial effect:
OLED pixel of the present invention comprises three groups of inferior pixel groups, and each inferior pixel group includes a shared drive circuit and luminous wave band is the first inferior pixel and the second inferior pixel of complementary relationship, be that OLED pixel of the present invention comprises six kinds of inferior pixels, the luminous wave band summation of the first inferior pixel in simultaneously, respectively should Asia pixel group is the white light wave band.Further, the present invention utilizes the diffraction of light principle, and the form that adopts white light OLED luminous element, light splitting piece and light barrier to combine forms respectively respectively should the Asia pixel.
OLED pixel of the present invention utilization comprises that the CMY imaging system of the inferior pixel of C, the inferior pixel of M and the inferior pixel of Y realizes the colour imaging of OLED display floater, and the RGB imaging system that comprises the inferior pixel of R, the inferior pixel of G and the inferior pixel of B that keeps traditional sense compensates imaging, to guarantee the saturation of color.
Compared to three kinds of traditional OLED colour imaging principles, six kinds of inferior pixels of the present invention are owing to all adopting the white light OLED luminous element, the color distortion of therefore having avoided the degree of aging problem of different materials to bring; Simultaneously, the inferior pixel of the C of CMY imaging system, the inferior pixel of M and 3 kinds of inferior pixels of the inferior pixel of Y are collaborative to carry out imaging because the present invention has increased again, thereby improved the luminous efficiency of OLED pixel, and then reduction power consumption, in the situation that the present invention is guaranteeing that color saturation is constant, when the most desirable when luminous (only use the inferior pixel of C, the inferior pixel of M and the inferior pixel of Y carry out), the power consumption of OLED pixel of the present invention can reach half of OLED pixel power consumption that tradition is used filter; Further, because the first inferior pixel in each inferior pixel group of the present invention and the second inferior pixel share a drive circuit, therefore so that the area ratio of circuit part reduction in the OLED pixel, thereby improve the ratio of OLED pixel efficient lighting area, be conducive to reduce the size of pixel in the OLED display floater, to improve the resolution of OLED display floater of the present invention.
Description of drawings
Fig. 1 is shown as the distribution schematic diagram of each inferior pixel group and each inferior pixel in the OLED pixel of the present invention.
Fig. 2 is shown as optical transmission principles schematic diagram in the concrete structure of light splitting piece in the inferior pixel of the present invention and the inferior pixel.
Fig. 3 is shown as the structural representation of the inferior pixel of R of the present invention.
Fig. 4 is shown as the structural representation of the inferior pixel of C of the present invention.
Fig. 5 is shown as the present invention and uses in the display floater of OLED pixel the annexation schematic diagram of selecting line, data wire and horizontal scanning line in OLED pixel group corresponding with it.
Fig. 6 is shown as the present invention and uses the annexation schematic diagram of selecting line, data wire and horizontal scanning line in the group corresponding with it of a plurality of OLED pixels in the display floater of OLED pixel.
The element numbers explanation
Embodiment
Below by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification.The present invention can also be implemented or be used by other different embodiment, and the every details in this specification also can be based on different viewpoints and application, carries out various modifications or change under the spirit of the present invention not deviating from.
See also Fig. 1 to Fig. 6.Need to prove, the diagram that provides in the following specific embodiment only illustrates basic conception of the present invention in a schematic way, satisfy only show in graphic with the present invention in relevant assembly but not component count, shape and size drafting when implementing according to reality, kenel, quantity and the ratio of each assembly can be a kind of random change during its actual enforcement, and its assembly layout kenel also may be more complicated.
The method that traditional OLED adopts when realizing the demonstration of coloured image mainly contains three kinds: realize the luminous of three kinds of colors of RGB with different luminescent materials 1., but, the shortcoming of this mode is that luminescent material must be optimized for different colors, and the luminescent layer of different materials is variant on useful life, and different degree of agings is so that the Show Color distortion; 2. then the use white luminescent material adds that filter produces the light of three kinds of colors of RGB, and still, the shortcoming of this mode is that energy utilization efficiency is low, arrives 30%-50% through the light energy losses behind the filter; 3. then use blue emitting material produces the light of three kinds of colors of RGB by the color conversion medium, but, the shortcoming of this mode and the 1st kind of method are similar, exist equally the life problems of color conversion medium and need stable blue emitting material.Therefore, when improving luminous efficiency, can eliminate again because the problem of the cross-color that the life-span difference of different luminescent materials, different colours transition material is brought is needed solution badly.
In view of this, the invention provides a kind of OLED pixel and use the display floater of this OLED pixel, OLED pixel of the present invention comprises three groups of inferior pixel groups, and each inferior pixel group includes a shared drive circuit and luminous wave band is the first inferior pixel and the second inferior pixel of complementary relationship, be that OLED pixel of the present invention comprises six kinds of inferior pixels, the luminous wave band summation of the first inferior pixel in simultaneously, respectively should Asia pixel group is the white light wave band.Further, the present invention utilizes the diffraction of light principle, and the form that adopts white light OLED luminous element, light splitting piece and light barrier to combine forms respectively respectively should the Asia pixel.OLED pixel of the present invention utilization comprises that the CMY imaging system of the inferior pixel of C, the inferior pixel of M and the inferior pixel of Y realizes the colour imaging of OLED display floater, and the RGB imaging system that comprises the inferior pixel of R, the inferior pixel of G and the inferior pixel of B that keeps traditional sense compensates imaging, to guarantee the saturation of color.
Compared to three kinds of traditional OLED colour imaging principles, six kinds of inferior pixels of the present invention are owing to all adopting the white light OLED luminous element, the color distortion of therefore having avoided the degree of aging problem of different materials to bring; Simultaneously, the inferior pixel of the C of CMY imaging system, the inferior pixel of M and 3 kinds of inferior pixels of the inferior pixel of Y are collaborative to carry out imaging because the present invention has increased again, thereby improved the luminous efficiency of OLED pixel, and then reduction power consumption, in the situation that the present invention is guaranteeing that color saturation is constant, when the most desirable when luminous (only use the inferior pixel of C, the inferior pixel of M and the inferior pixel of Y carry out), the power consumption of OLED pixel of the present invention can reach half of OLED pixel power consumption that tradition is used filter; Further, because the first inferior pixel in each inferior pixel group of the present invention and the second inferior pixel share a drive circuit, therefore so that the area ratio of circuit part reduction in the OLED pixel, thereby improve the ratio of OLED pixel efficient lighting area, be conducive to reduce the size of pixel in the OLED display floater, to improve the resolution of OLED display floater of the present invention.Below will elaborate OLED pixel of the present invention and use principle and the execution mode of the display floater of this OLED pixel, and make those skilled in the art not need creative work can understand OLED pixel of the present invention and use the display floater of this OLED pixel.
Embodiment one
As shown in Figures 1 to 4, this law is bright provides a kind of OLED pixel 100 to comprise at least: the first inferior pixel group 1, Sanya pixel group 3 and first and Sanya pixel group between the second inferior pixel group 2.Described OLED pixel 100 is rectangle, and in the present embodiment, preferred described OLED pixel 100 is square.
Wherein, described each inferior pixel group comprises the first inferior pixel and the second inferior pixel of shared one drive circuit (seeing Fig. 5 of embodiment two for details), and respectively this first inferior pixel and the second inferior pixel all the drive circuit corresponding with it be connected, as shown in Figure 1, the first inferior pixel group 1 comprises the first inferior pixel 11 of the first inferior pixel group and the second inferior pixel 12 of the first inferior pixel group, the second inferior pixel group 2 comprises that the first inferior pixel 21 of the second inferior pixel group and the second inferior pixel 22, the Sanya pixel groups 3 of the second inferior pixel group comprise the first inferior pixel 31 of Sanya pixel group and the second inferior pixel 32 of Sanya pixel group.
Further, the first inferior pixel in each inferior pixel group and the second inferior pixel include white light OLED luminous element and mutual corresponding light splitting piece and light barrier as required, so that the luminous wave band summation of the described first inferior pixel and the second inferior pixel is the white light wave band, that is the luminous wave band of the first inferior pixel in each inferior pixel group and the second inferior pixel is complementary relationship; The luminous wave band summation of the first inferior pixel in respectively should Asia pixel group is the white light wave band; Have enough distances between respectively should the Asia pixel and enter the light splitting piece of adjacent inferior pixel to prevent the output light of inferior pixel, avoid causing crosstalking between the adjacent inferior pixel.
Of particular note, compared to three kinds of traditional OLED colour imaging principles, six kinds of inferior pixels of the present invention are owing to all adopting the white light OLED luminous element, the color distortion of therefore having avoided the degree of aging problem of different materials to bring.
Need to further be pointed out that, because the first inferior pixel in each inferior pixel group and the second inferior pixel share a drive circuit, therefore so that the area ratio of circuit part reduction in the OLED pixel, thereby improve the ratio of OLED pixel efficient lighting area, be conducive to reduce the size of pixel in the OLED display floater of using OLED pixel of the present invention, to improve the resolution of OLED display floater of the present invention.
Need to prove, as shown in Figure 2, described light splitting piece corresponding in each inferior pixel group is trapezoidal; The material of described light splitting piece is the silicon nitride transparent material; The difference of the light splitting piece of corresponding different-waveband is the difference on its physical dimension, in each inferior pixel, by adjusting size (the upper base edge lengths m2 that comprises light splitting piece of light splitting piece F2, bottom length m 1, height d1) and the relative distance d 2 of light splitting piece and white light OLED luminous element F1, so that described light splitting piece is exported the light of its corresponding specific band, wherein, respectively the scope of this parameter m 2, m1, d1 and d2 depends on the size of the OLED pixel that is complementary with it.
What need to further specify is, as shown in Figure 2, the present invention utilizes the diffraction of light principle, by using the light splitting piece of particular geometric size, the light L0 of white light OLED luminous element output is divided into three-beam L1, L2 and L3, wherein, light beam L1 has filtered the light that obtains behind the light of specific wavelength (corresponding wave band determines by light splitting piece F1) in the middle of being positioned at, and is positioned at the two-beam L2 on both sides and the light that L3 is specific wavelength.
It is pointed out that in each inferior pixel group the first inferior pixel and the corresponding identical wave band of the second inferior pixel light splitting piece separately; In each inferior pixel group, light barrier in described first, second inferior pixel is used for sheltering from the light of described first, second the inferior pixel light splitting piece output of part, pass through selective blocking, the position of adjusting light barrier in described first, second inferior pixel is relative complementary relationship, make light splitting piece cooperation light barrier separately in described first, second inferior pixel, the wave band of realizing described first, second inferior pixel output light is complementary relationship, that is realizes that the luminous wave band summation of described first, second inferior pixel is the white light wave band.
It needs to be noted, whether size that respectively should Asia pixel group does not limit and equates; Whether restriction is inequal yet for the first inferior pixel in each inferior pixel group and the second inferior pixel dimension; Whether restriction is inequal yet for white light OLED luminous element size corresponding in the first inferior pixel of each inferior pixel group and the second inferior pixel; Whether restriction is inequal yet for the white light OLED luminous element size of the middle correspondence of different inferior pixel groups.Simultaneously, described white light OLED luminous element shape is not done concrete restriction yet.
In the present embodiment, as shown in Figure 1, Fig. 1 is shown as the distribution schematic diagram of each inferior pixel group and inferior pixel in the OLED pixel, OLED pixel 100 comprises six kinds of inferior pixels, in these six kinds of inferior pixels, the first inferior pixel in three groups of inferior pixel groups forms the imaging system that a cover comprises three kinds of inferior pixels, the second inferior pixel in remaining three groups inferior pixel groups forms the another set of imaging system that comprises three kinds of inferior pixels, in the present embodiment, that is six kinds of inferior pixels of OLED pixel 100 are divided into the RGB imaging system and (comprise the inferior pixel 11 of R, the inferior pixel 31 of the inferior pixel 21 of G and B) and the CMY imaging system (comprise the inferior pixel 12 of C, the inferior pixel 22 of M and the inferior pixel 32 of Y), specific as follows:
The first inferior pixel 11 of the described first inferior pixel group 1 is the inferior pixel of R, and the second inferior pixel 12 of the described first inferior pixel group 1 is the inferior pixel of C; The first inferior pixel 21 of the described second inferior pixel group 2 is the inferior pixel of G, and the second inferior pixel 22 of the described second inferior pixel group 2 is the inferior pixel of M; The first inferior pixel 31 of described Sanya pixel group 3 is the inferior pixel of B, and the second inferior pixel 31 of described Sanya pixel group 3 is the inferior pixel of Y.Wherein, R(Red) inferior pixel is the inferior pixel of ruddiness; G(Green) inferior pixel is the inferior pixel of green glow; B(Blue) inferior pixel is the inferior pixel of blue light; C(Cyan) inferior pixel is the inferior pixel of cyan light; M(Magenta) inferior pixel is the inferior pixel of pinkish red coloured light; Y(Yellow) inferior pixel is the inferior pixel of sodium yellow.Wherein, wave band corresponding to described cyan light be blue wave band and green light band and, that is C(Cyan)=B(Blue)+G(Green); The wave band that described pinkish red coloured light is corresponding be red spectral band and blue wave band and, that is M(Magenta)=R(Red)+B(Blue); The wave band that described sodium yellow is corresponding be red spectral band and green light band and, that is Y(Yellow)=R(Red)+G(Green), specifically see also the detailed description of follow-up principle in the present embodiment.
Therefore, for the first, second, and third inferior pixel group of the present embodiment, it satisfies: the first inferior pixel in each inferior pixel group and the luminous wave band summation of the second inferior pixel are the white light wave band, that is the luminous wave band of the first inferior pixel in each inferior pixel group and the second inferior pixel is complementary relationship; The luminous wave band summation of the first inferior pixel in respectively should Asia pixel group is the white light wave band.Simultaneously, in the present embodiment, have enough distances between respectively should the Asia pixel and enter the light splitting piece of adjacent inferior pixel to prevent the output light of inferior pixel, avoid causing crosstalking between the adjacent inferior pixel.
Need to prove, in the present embodiment, preferred the present embodiment respectively should Asia pixel group size equate, simultaneously, first, second the inferior pixel dimension in respectively should Asia pixel group equates, further, respectively should the Asia pixel in the size of white light OLED luminous element equate.But be not limited to this, size that respectively should Asia pixel group also can be unequal; The first inferior pixel and the second inferior pixel dimension in each inferior pixel group also can be unequal; White light OLED luminous element size corresponding in the first inferior pixel of each inferior pixel group and the second inferior pixel also can be unequal; The white light OLED luminous element size of the middle correspondence of different inferior pixel groups also can be unequal.But, when relative dimensions is unequal, then when whether the follow-up CMY imaging system that relates to of the present embodiment needs RGB system balance and OLED pixel power-dissipation-reduced degree of the present invention, then need to adjust coefficient correlation according to corresponding different size, that is need to be revised correlated results as coefficient with the relative dimensions size.
What need to further specify is, in the present embodiment, the preferred isosceles trapezoid of the shape of light splitting piece, purpose are in order to simplify spectrophotometric result, so that the energy of the light that is positioned at the left and right sides of light splitting piece output equates and the wave band frequency spectrum is consistent, be conducive to simplify respectively the topology layout in should the Asia pixel.But be not limited to this, the shape of described light splitting piece also can be for general trapezoidal, but corresponding spectrophotometric result is comparatively complicated, then need respectively should the Asia pixel the classification layout also adjust thereupon.
The below only is elaborated as an example of the first inferior pixel group 1 example, second and the situation of the situation of Sanya pixel group and the first inferior pixel group similar, same section is then given unnecessary details no longer one by one.
Such as Fig. 1, Fig. 3 and shown in Figure 4, the described first inferior pixel group 1 comprises the inferior pixel of the first inferior pixel 11(R of shared one drive circuit (seeing Fig. 5 for details)) and the inferior pixel of the second inferior pixel 12(C), and the equal drive circuits corresponding with it be connected (seeing the Fig. 5 among the embodiment two for details) of the inferior pixel of R and C Asia pixel.
What Fig. 3 represented is the structural representation of the inferior pixel of R.In Fig. 3, the inferior pixel 11 of described R comprises white light OLED luminous element 111, ruddiness light splitting piece 112 and light barrier 4.Wherein, described ruddiness light splitting piece 112 corresponding red spectral bands, that is the light of the specific wavelength of ruddiness light splitting piece 112 outputs is ruddiness.
Light path principle among Fig. 3 is as follows: the white light (W of white light OLED luminous element 111 outputs, White) through dividing for three-beam behind the ruddiness light splitting piece 112, wherein, light beam in the middle of being positioned at is the light (W-R) after white light deducts ruddiness, cyan light (C namely, Cyan), and the light beam that is positioned at the right and left is ruddiness, because in the present embodiment, light splitting piece 112 is isosceles trapezoid, therefore the ruddiness that is arranged in the right and left 1/2nd of the former white light energy ruddiness composition of respectively doing for oneself, that is the two bundle ruddiness that are positioned at both sides are 0.5*R.
For the inferior pixel 11 of R, need output ruddiness (R), therefore, optionally stop the cyan light (C, Cyan) in the middle of being positioned at, form the inferior pixel 11 of R.
What in like manner, Fig. 4 represented is the structural representation of the inferior pixel of C.In Fig. 4, the inferior pixel 12 of described C comprises white light OLED luminous element 121, ruddiness light splitting piece 122 and light barrier 4, wherein, the ruddiness light splitting piece 122 of the inferior pixel 12 of C and the ruddiness light splitting piece 112 corresponding identical wave bands of the inferior pixel 11 of R, be corresponding red spectral band, that is the light of the specific wavelength of ruddiness light splitting piece 112 and 122 outputs is ruddiness.
Light path principle and Fig. 3 among Fig. 4 are similar, and difference only is the position difference of light barrier 4.Because the inferior pixel 12 of C needs output cyan light (C), therefore, optionally stop the ruddiness (0.5*R) that is positioned at both sides, wherein, the position of the light barrier 4 among the position of the light barrier 4 among Fig. 4 and Fig. 3 is relative complementary, thereby form the inferior pixel 12 of C among Fig. 4, form the inferior pixel 11 of R among Fig. 3, and the luminous wave band summation of the inferior pixel 11 of R and the inferior pixel 12 of C is the white light wave band.
As mentioned above, because ruddiness light splitting piece, green glow light splitting piece and blue light light splitting piece in the present embodiment are isosceles trapezoid, then for second and Sanya pixel group for, according to same principle, obtain being positioned at middle a branch of pinkish red coloured light (M after utilizing the green glow light splitting piece, Magenta) and be positioned at the two bundle green light (0.5*G) on both sides, and the selective blocking by light barrier, realize the inferior pixel of G and the inferior pixel of M that luminous wave band summation is the white light wave band; Utilize a branch of sodium yellow (Y, Yellow) in the middle of obtaining behind the blue light light splitting piece being positioned at and be positioned at the two bundle blue light beams (0.5*B) on both sides, and the selective blocking by light barrier, realize the inferior pixel of B and Y Asia pixel that luminous wave band summation is the white light wave band.Further, again because white light (W) is divided into ruddiness (R, Red) wave band, green glow (G, Green) wave band and blue light (B, Blue) wave band at wave band, then the angle of above-mentioned light on wave band covers satisfies C=B+G; M=R+B; Y=R+G.
Need to prove, in the present embodiment, the luminous wave band summation of the first inferior pixel (the inferior pixel 11 of R, the inferior pixel 21 of G and the inferior pixel 31 of B) in respectively should Asia pixel group is the white light wave band; Simultaneously, have enough distances between respectively should the Asia pixel and enter the light splitting piece of adjacent inferior pixel to prevent the output light of inferior pixel, avoid causing crosstalking between the adjacent inferior pixel.
What need to further specify is, the difference of the light splitting piece of corresponding different-waveband is the difference on its physical dimension, in each inferior pixel, by adjusting size (the upper base edge lengths m2 that comprises light splitting piece of light splitting piece, bottom length m 1, height d1) and relative distance (the upper base edge lengths m2 that comprises light splitting piece of light splitting piece and white light OLED luminous element, bottom length m 1, height d1), so that the light of the default wave band of described light splitting piece output, wherein, respectively the scope of this parameter m 2, m1, d1 and d2 depends on the size of the OLED pixel that it is complementary.In the present embodiment, ruddiness light splitting piece, green glow light splitting piece and blue light light splitting piece are isosceles trapezoid, being directed to a length of side is the square white light OLED luminous element of 50 μ m, preferably, for the ruddiness light splitting piece: bottom length m 1 is about 43 μ m, upper base edge lengths m2 is about 33 μ m, and d highly is about 114 μ m, and between ruddiness light splitting piece and the white light OLED luminous element more is 40 μ m apart from d2; For the green glow light splitting piece: m1 is about 40 μ m, and m2 is about 35 μ m, and d1 is about 67 μ m, and d2 is about 40 μ m; For the blue light light splitting piece: m1 is about 34 μ m, and m2 is about 30 μ m, and d1 is about 42 μ m, and d2 is about 40 μ m.
In order to make those skilled in the art further understand principle of the present invention, execution mode and beneficial effect, below will carry out the labor of related content.
Why the present invention improves the luminous efficiency reason is:
Use OLED pixel imaging of the present invention to show in the process of light of particular color (wave band), because the first inferior pixel in each inferior pixel group of the present invention and the second inferior pixel share a drive circuit, then only select an inferior pixel in each inferior pixel group to carry out luminous, that is the present invention select three kinds of inferior pixels and carry out work from six kinds of inferior pixels.Further, because the first inferior pixel in each inferior pixel group of the present invention and the second inferior pixel share a drive circuit, therefore so that the area ratio of circuit part reduction in the OLED pixel, thereby improve the ratio of OLED pixel efficient lighting area, be conducive to reduce the size of pixel in the OLED display floater, to improve the resolution of OLED display floater of the present invention.
In the present embodiment, as shown in Figure 1, six kinds of inferior pixels of OLED pixel 100 are divided into RGB imaging system (comprising the inferior pixel 11 of R, the inferior pixel 21 of G and the inferior pixel 31 of B) and CMY imaging system (comprising the inferior pixel 12 of C, the inferior pixel 22 of M and the inferior pixel 32 of Y).
Thereby, in the process of the light that uses OLED pixel imaging demonstration particular color of the present invention (wave band), three kinds of inferior pixels that carry out luminous work can all be selected from RGB imaging system or CMY imaging system, also can from the RGB imaging system with select three kinds of required inferior pixels after the CMY imaging system combines.
Again because, the composition of white light (W) can be divided into three parts of red spectral band (R), green light band (G) and blue wave bands (B), then as previously mentioned, white light is divided into three-beam through behind the light splitting piece, for ruddiness light splitting piece, green glow light splitting piece or blue light light splitting piece, the light (a certain inferior pixel in the CMY imaging system) that then passes through the centre behind the light splitting piece accounts for 2/3 of former white light gross energy, and the light (a certain inferior pixel of RGB imaging system) of the two bundle specific wavelengths of separating towards both sides account for 1/3 of gross energy altogether.
Thereby, in the process of the light that uses OLED pixel imaging demonstration particular color of the present invention (wave band), when three kinds of inferior pixels that carry out luminous work all were selected from the RGB imaging system, then the present invention used the OLED pixel of filter to have identical luminous efficiency with tradition; But when three kinds of inferior pixels that carry out luminous work among the present invention all are selected from the CMY imaging system, then luminous efficiency of the present invention then is the twice that tradition is used the OLED pixel of filter, in other words, at this moment, the power consumption of OLED pixel of the present invention can reach half of OLED pixel power consumption that tradition is used filter.
The inferior pixel of the C of CMY imaging system, the inferior pixel of M and 3 kinds of inferior pixels of the inferior pixel of Y are collaborative to carry out imaging because the present invention has increased, thereby improved the luminous efficiency of OLED pixel, and then reduction power consumption, in the situation that the present invention is guaranteeing that color saturation is constant, when the most desirable when luminous (only use the inferior pixel of C, the inferior pixel of M and the inferior pixel of Y carry out), the power consumption of OLED pixel of the present invention can reach half of OLED pixel power consumption that tradition is used filter.
Principle during concrete imaging of the present invention is as follows:
When imaging shows, the present invention becomes luminous intensity data corresponding to CMY three form and aspect with the luminous intensity data transaction of original RGB three looks, the luminous intensity that represents corresponding inferior pixel with lowercase, because in the present embodiment, white light OLED luminous element size and the first inferior pixel in each inferior pixel group corresponding in the first inferior pixel of each inferior pixel group and the second inferior pixel are all equal with the second inferior pixel dimension, simultaneously, each light splitting piece is isosceles trapezoid, therefore can obtain the relational expression of following luminous intensity conversion:
c=0.5*（g+b-r）
m=0.5*（g+r-b）
y=0.5*（r+b-g）
Can be known by top relational expression, in the situation of the light that utilizes OLED pixel demonstration particular color of the present invention (wave band):
In the RGB three primary colors of the light of described pre-demonstration, when the luminous intensity of a certain primary colors during less than two other primary colors luminous intensity sum, then c, the m after the conversion and three luminous intensity values of y are all greater than 0, so only use the CMY imaging system, namely only use the respective combination of the inferior pixel 12 of C, the inferior pixel 22 of M and the inferior pixel 32 of Y, just can form the light of pre-demonstration wave band, in other words, if c, m after the conversion and three luminous intensity values of y are all greater than 0, then the light of the pre-particular color that shows can well be reduced;
In the RGB three primary colors of the light of described pre-demonstration, when the luminous intensity of a certain primary colors during greater than two other primary colors luminous intensity sum, then having certain value in c, the m after the conversion and three luminous intensity values of y is negative value.For example; in the RGB three primary colors of the light of described pre-demonstration; when the luminous intensity r of R primary colors surpasses the luminous intensity g sum of the luminous intensity b of B primary colors and G primary colors; be r〉b+g; then c is negative value; this moment, instruction book net income CMY imaging system namely used merely the method for the respective combination of the inferior pixel 12 of C, the inferior pixel 22 of M and Y Asia pixel 32 can't normally restore the light of the particular color of pre-demonstration.When the luminous intensity g that same problem also can appear at the luminous intensity b of B primary colors or G primary colors surpasses the luminous intensity sum of all the other two primary colors.Therefore, when one of c, m and three luminous intensity values of y are negative value, need to use the RGB imaging system, namely the inferior pixel 11 of R, the inferior pixel 21 of G and the inferior pixel 31 of B compensate, with the color saturation of the light that guarantees the pre-particular color that shows.
For example, in the light for the particular color of pre-demonstration, when the luminous intensity r of required R primary colors is very large (r〉b+g), because the angle of aforementioned light on wave band covers satisfies C=B+G; M=R+B; Y=R+G, therefore utilize the inferior pixel 22 of M that blue light (B) and part ruddiness (R) are provided and utilize Y Asia pixel 32 to provide green glow (G) and part ruddiness (R) afterwards, because, required R primary colors is a lot, then also needing provides the ruddiness of extra needs to compensate with the inferior pixel 11 of R, to guarantee the in advance color saturation of the light of the particular color of demonstration.
Embodiment two
The present invention also provides a kind of OLED display floater, comprises at least: a plurality of as selecting line, many data wires and many horizontal scanning lines in embodiment one described OLED pixel, many groups.
Described OLED pixel describes in detail at this no longer one by one as described in the embodiment one.
Select line in described many groups, extend along first direction, respectively each inferior pixel group of this OLED pixel is selected line in the corresponding group respectively, select line to be connected to respectively each each self-corresponding drive circuit of inferior pixel group in the OLED pixel in every group, be communicated with the first inferior pixel or the second inferior pixel in each inferior pixel group by selecting the described drive circuit of line traffic control in described group.
Described many data wires, extend along first direction, respectively each inferior pixel group of this OLED pixel is distinguished corresponding data wire, every data wire is connected to respectively each each self-corresponding drive circuit of inferior pixel group in the OLED pixel, should the Asia pixel luminous to drive respectively to signal corresponding to the first inferior pixel in each inferior pixel group or the second inferior pixel transmission luminous intensity by described data wire, wherein, the signal of described transmission luminous intensity is voltage, electric current or digit pulse control signal.
Described many horizontal scanning lines, extend along the second direction that is different from first direction, a plurality of OLED pixels that are positioned on the second direction share a horizontal scanning line, described horizontal scanning line all is connected to the drive circuit of each inferior pixel group in the OLED pixel, by the signal on each self-corresponding data wire of respectively should Asia pixel group whether receiving simultaneously of described horizontal scanning line control OLED pixel.
In the present embodiment, as shown in Figure 5, only describe as an example of an OLED pixel 100 example among Fig. 5, point out to use the annexation of selecting line, data wire and horizontal scanning line in the group corresponding with it of OLED pixel 100 in the display floater of this OLED pixel, the operation principle of the OLED display floater of this OLED pixel 100 is used in follow-up introduction.
In Fig. 5, select line to extend along first direction (longitudinal direction) in described group, first, second, and third inferior pixel group of OLED pixel 100 is selected line in the corresponding group respectively, particularly, select line in the inferior pixel 11 of the R of the first inferior pixel group and the inferior pixel 12 corresponding same groups of C, in like manner, select line in the inferior pixel 21 of the G of the second inferior pixel group and the inferior pixel 22 corresponding same groups of M, select line in the inferior pixel 31 of the B of Sanya pixel group and the inferior pixel 32 corresponding same groups of Y; Select line to be connected to respectively first, second, and third each self-corresponding drive circuit of inferior pixel group in the OLED pixel 100 in every group, and by selecting in described group the described drive circuit of line traffic control to be communicated with the first inferior pixel or the second inferior pixel in each inferior pixel group.
In Fig. 5, described data wire all extends along first direction (longitudinal direction), respectively corresponding data wire of first, second, and third inferior pixel group of OLED pixel 100, particularly, the inferior pixel 11 of the R of the first inferior pixel group and the inferior pixel 12 corresponding same data wires of C, in like manner, the inferior pixel 21 of the G of the second inferior pixel group and the inferior pixel 22 corresponding same data wires of M, the inferior pixel 31 of the B of Sanya pixel group and the inferior pixel 32 corresponding same data wires of Y; Every data wire be connected to respectively OLED pixel 100 in first, second, and third each self-corresponding drive circuit of inferior pixel group, and should the Asia pixel luminous to drive respectively to signal corresponding to the first inferior pixel in each inferior pixel group or the second inferior pixel transmission luminous intensity by described data wire, wherein, in the present embodiment, the signal of preferred described transmission luminous intensity is voltage.
In Fig. 5, described horizontal scanning line extends along the second direction (horizontal direction) that is different from first direction, be positioned at the described OLED pixel 100 corresponding horizontal scanning lines on the second direction, described horizontal scanning line all is connected to each each self-corresponding drive circuit of inferior pixel group in the OLED pixel 100, by the signal on each self-corresponding data wire of respectively should Asia pixel group whether receiving simultaneously of described horizontal scanning line control OLED pixel 100.
The operation principle of OLED display floater of using described OLED pixel 100 is as described below:
When the row that transmits on the described horizontal scanning line selected certain delegation in the signal gating OLED display floater of the present invention, all OLED pixels (comprising OLED pixel 100) of this row received signal (such as voltage signal) corresponding to luminous intensity that transmits on the respective data lines separately simultaneously; Be directed to the some OLED pixels in this row, in the present embodiment, the data wire that OLED pixel 100 is used for signal corresponding to reception luminous intensity has three, simultaneously, in the OLED pixel 100, select line also to be three in the group corresponding with it, selecting line to control respectively in the OLED pixel 100 each each self-corresponding drive circuit of inferior pixel group in each group is communicated with respectively and drives the inferior pixel 11 of described R or the inferior pixel 12 of C, the inferior pixel 21 of described G or the inferior pixel 22 of M, and the inferior pixel 31 of described B or the inferior pixel 32 of Y, carry out luminous work in order to three kinds of controlling in six kinds of inferior pixels.
Further, it is a plurality of situations that Fig. 6 in the present embodiment also provides the OLED pixel in the display floater of using this OLED pixel, comprise OLED pixel 100, OLED pixel 200, OLED pixel 300 and OLED pixel 400 these four OLED pixels, wherein, do not limit whether the relative position of first, second inferior pixel will be unanimously in each inferior pixel group in each OLED pixel, for example, in four of Fig. 6 OLED pixels in the corresponding inferior pixel group relative position of first, second inferior pixel not consistent.Further, the connected mode of each concrete OLED pixel and operation principle and single OLED pixel 100 are similar, give unnecessary details no longer one by one at this.
In sum, OLED pixel of the present invention comprises three groups of inferior pixel groups, and each inferior pixel group includes a shared drive circuit and luminous wave band is the first inferior pixel and the second inferior pixel of complementary relationship, be that OLED pixel of the present invention comprises six kinds of inferior pixels, the luminous wave band summation of the first inferior pixel in simultaneously, respectively should Asia pixel group is the white light wave band.Further, the present invention utilizes the diffraction of light principle, and the form that adopts white light OLED luminous element, light splitting piece and light barrier to combine forms respectively respectively should the Asia pixel.OLED pixel of the present invention utilization comprises that the CMY imaging system of the inferior pixel of C, the inferior pixel of M and the inferior pixel of Y realizes the colour imaging of OLED display floater, and the RGB imaging system that comprises the inferior pixel of R, the inferior pixel of G and the inferior pixel of B that keeps traditional sense compensates imaging, to guarantee the saturation of color.Compared to three kinds of traditional OLED colour imaging principles, six kinds of inferior pixels of the present invention are owing to all adopting the white light OLED luminous element, the color distortion of therefore having avoided the degree of aging problem of different materials to bring; Simultaneously, the inferior pixel of the C of CMY imaging system, the inferior pixel of M and 3 kinds of inferior pixels of the inferior pixel of Y are collaborative to carry out imaging because the present invention has increased again, thereby improved the luminous efficiency of OLED pixel, and then reduction power consumption, in the situation that the present invention is guaranteeing that color saturation is constant, when the most desirable when luminous (only use the inferior pixel of C, the inferior pixel of M and the inferior pixel of Y carry out), the power consumption of OLED pixel of the present invention can reach half of OLED pixel power consumption that tradition is used filter; Further, because the first inferior pixel in each inferior pixel group of the present invention and the second inferior pixel share a drive circuit, therefore so that the area ratio of circuit part reduction in the OLED pixel, thereby improve the ratio of OLED pixel efficient lighting area, be conducive to reduce the size of pixel in the OLED display floater, to improve the resolution of OLED display floater of the present invention.So the present invention has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not is used for restriction the present invention.Any person skilled in the art scholar all can be under spirit of the present invention and category, and above-described embodiment is modified or changed.Therefore, have in the technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of finishing under disclosed spirit and the technological thought, must be contained by claim of the present invention.
Claims (11)
1. an OLED pixel is characterized in that, described OLED pixel comprises at least: the first inferior pixel group, Sanya pixel group and first and Sanya pixel group between the second inferior pixel group;
Each inferior pixel group comprises the first inferior pixel and the second inferior pixel that shares one drive circuit;
In each inferior pixel group, the first inferior pixel and the second inferior pixel include white light OLED luminous element, light splitting piece and light barrier, so that the luminous wave band summation of the described first inferior pixel and the second inferior pixel is the white light wave band;
The luminous wave band summation of the first inferior pixel in respectively should Asia pixel group is the white light wave band;
Have enough distances between respectively should the Asia pixel and enter the light splitting piece of adjacent inferior pixel to prevent the output light of inferior pixel, avoid causing crosstalking between the adjacent inferior pixel.
2. OLED pixel according to claim 1, it is characterized in that: in each inferior pixel group, the first inferior pixel and the corresponding identical wave band of the second inferior pixel light splitting piece separately, and be relative complementary relationship by the position of adjusting light barrier in described first, second inferior pixel, described light splitting piece and light barrier are cooperatively interacted, realize that the luminous wave band summation of the described first inferior pixel and the second inferior pixel is the white light wave band.
3. OLED pixel according to claim 2 is characterized in that: the first inferior pixel of the described first inferior pixel group is the inferior pixel of R, and the second inferior pixel of the described first inferior pixel group is the inferior pixel of C; The first inferior pixel of the described second inferior pixel group is the inferior pixel of G, and the second inferior pixel of the described second inferior pixel group is the inferior pixel of M; The first inferior pixel of described Sanya pixel group is the inferior pixel of B, and the second inferior pixel of described Sanya pixel group is the inferior pixel of Y; Wherein, the inferior pixel of R is the inferior pixel of ruddiness, and the inferior pixel of G is the inferior pixel of green glow, and the inferior pixel of B is the inferior pixel of blue light, and the inferior pixel of C is the inferior pixel of cyan light, and the inferior pixel of M is the inferior pixel of pinkish red coloured light, and the inferior pixel of Y is the inferior pixel of sodium yellow.
4. according to claim 1,2 or 3 described OLED pixels, it is characterized in that: size that respectively should Asia pixel group equates.
5. OLED pixel according to claim 4 is characterized in that: the first inferior pixel in each inferior pixel group and the second inferior pixel dimension equate.
6. OLED pixel according to claim 5 is characterized in that: white light OLED luminous element size corresponding in the first inferior pixel in each inferior pixel group and the second inferior pixel equates.
7. according to claim 1,2 or 3 described OLED pixels, it is characterized in that: described light splitting piece corresponding in each inferior pixel group is trapezoidal.
8. OLED pixel according to claim 7, it is characterized in that: described light splitting piece is isosceles trapezoid.
9. according to claim 1,2 or 3 described OLED pixels, it is characterized in that: the material of described light splitting piece is the silicon nitride transparent material.
10. an OLED display floater is characterized in that, described OLED display floater comprises at least:
Such as the described a plurality of OLED pixels of any one in the claim 1 to 9;
Select line in many groups, extend along first direction, respectively each inferior pixel group of this OLED pixel is selected line in the corresponding group respectively, select line to be connected to respectively each the self-corresponding drive circuit of each inferior pixel group in the OLED pixel in every group, be communicated with the first inferior pixel or the second inferior pixel in each inferior pixel group by selecting the described drive circuit of line traffic control in described group;
Many data wires, extend along first direction, respectively each inferior pixel group of this OLED pixel is distinguished corresponding data wire, every data wire is connected to respectively each each self-corresponding drive circuit of inferior pixel group in the OLED pixel, and is should the Asia pixel luminous to drive respectively to signal corresponding to the first inferior pixel in each inferior pixel group or the second inferior pixel transmission luminous intensity by described data wire;
Many horizontal scanning lines, extend along the second direction that is different from first direction, a plurality of OLED pixels that are positioned on the second direction share a horizontal scanning line, described horizontal scanning line all is connected to each each self-corresponding drive circuit of inferior pixel group in the OLED pixel, by the signal on each self-corresponding data wire of respectively should Asia pixel group whether receiving simultaneously of described horizontal scanning line control OLED pixel.
11. OLED display floater according to claim 10 is characterized in that: the signal of described transmission luminous intensity is voltage, electric current or digit pulse control signal.
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