CN103325814B - A kind of OLED pixel and apply the display floater of this OLED pixel - Google Patents

Abstract

The present invention provides an OLED pixel and a display panel using the OLED pixel. The OLED pixel of the present invention includes three groups of sub-pixel groups. The sub-pixel and the second sub-pixel, and the sum of the luminescence bands of the first sub-pixel in each sub-pixel group is a white light band. The present invention utilizes the principle of light diffraction to form the sub-pixels in the form of a combination of a white OLED luminous body, a light splitter and a light baffle. Since the six sub-pixels of the present invention all adopt white light OLED emitters, the color distortion caused by the aging degree of different materials is avoided; the present invention increases three kinds of sub-pixels to coordinate imaging processing, thereby improving OLED The luminous efficiency of the pixel reduces power consumption; and because the two sub-pixels in each sub-pixel group share the drive circuit, the resolution of the OLED display panel of the present invention is further improved.

Description

An OLED pixel and a display panel using the OLED pixel

technical field

The invention belongs to the field of semiconductors, and relates to a color realization method of an OLED (organic light-emitting diode), in particular to an OLED pixel and a display panel using the OLED pixel.

Background technique

Organic light-emitting diodes (Organic Light-Emitting Diode, OLED) can be used for flexible panels, use Wide temperature range, simple structure and manufacturing process and other excellent characteristics have attracted widespread attention and are used in flat panel display and other fields.

There are three main methods used by traditional OLEDs to display color images:

1. Use different luminescent materials to achieve RGB three-color luminescence. However, the disadvantage of this method is that the luminescent materials must be optimized for different colors, and the luminescent layers of different materials have differences in service life. Different aging The degree makes the display color distorted;

2. Use white light-emitting materials, and then add filters to produce RGB three-color light, but the disadvantage of this method is that the energy utilization efficiency is low, and the light energy lost to 30%-50% after passing through the filter ;

3. Use blue light-emitting materials, and then use the color conversion medium to generate RGB three-color light. However, the disadvantages of this method are similar to the first method. There are also life problems of the color conversion medium and the need for stable blue light. color luminescent material.

Therefore, it is urgent to solve the problem of eliminating the color distortion caused by the life difference of different luminescent materials and different color conversion materials while improving the luminous efficiency.

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an OLED pixel and a display panel using the OLED pixel, which are used to solve the problems caused by the life difference of different light-emitting materials and different color conversion materials in the prior art. The problem of color distortion is also used to solve the problem of low luminous efficiency in the prior art.

In order to achieve the above purpose and other related purposes, the present invention provides an OLED pixel, the OLED pixel at least includes: a first sub-pixel group, a third sub-pixel group and a first sub-pixel group between the first and third sub-groups Two sub-pixel groups; each sub-pixel group includes a first sub-pixel and a second sub-pixel sharing a drive circuit; in each sub-pixel group, the first sub-pixel and the second sub-pixel are both Including white light OLED illuminants, spectroscopic sheets and light baffles, so that the sum of the light-emitting wavelength bands of the first sub-pixel and the second sub-pixel is a white light band; the first sub-pixel in each sub-pixel group The sum of the luminous wavelength bands is the white light band; there is enough distance between the sub-pixels to prevent the output light of the sub-pixels from entering the beam splitter of the adjacent sub-pixels, and avoid causing crosstalk between adjacent sub-pixels.

Optionally, in each sub-pixel group, the respective spectroscopic sheets of the first sub-pixel and the second sub-pixel correspond to the same waveband, and by adjusting the positions of the light baffles in the first and second sub-pixels In order to be relatively complementary, the light splitter and the light baffle plate cooperate with each other to realize that the sum of the light-emitting wavelength bands of the first sub-pixel and the second sub-pixel is a white light band. Optionally,

Optionally, the first sub-pixel of the first sub-pixel group is an R sub-pixel, and the second sub-pixel of the first sub-pixel group is a C sub-pixel; the second sub-pixel The first sub-pixel of the tuple is the G sub-pixel, the second sub-pixel of the second sub-pixel group is the M sub-pixel; the first sub-pixel of the third sub-pixel group is the B sub-pixel A pixel, the second sub-pixel of the third sub-pixel group is a Y sub-pixel; wherein, the R sub-pixel is a red light sub-pixel, the G sub-pixel is a green light sub-pixel, and the B sub-pixel The sub-pixel C is the sub-pixel of blue light, the sub-pixel C is the sub-pixel of cyan light, the sub-pixel M is the sub-pixel of magenta light, and the sub-pixel Y is the sub-pixel of yellow light.

Optionally, the sizes of the sub-pixel groups are equal.

Optionally, the first sub-pixel and the second sub-pixel in each sub-pixel group are equal in size.

Optionally, the corresponding white OLED light emitters in the first sub-pixel and the second sub-pixel in each sub-pixel group are equal in size.

Optionally, the corresponding beam splitter in each sub-pixel group is trapezoidal.

Optionally, the light splitter is an isosceles trapezoid.

Optionally, the material of the light splitter is silicon nitride transparent material.

The present invention also provides an OLED display panel, the OLED display panel at least includes:

Multiple OLED pixels;

A plurality of selection lines in the group extend along the first direction, and each sub-pixel group of each OLED pixel corresponds to a selection line in the group, and each selection line in the group is respectively connected to each sub-pixel group in the OLED pixel. The corresponding driving circuit controls the driving circuit to communicate with the first sub-pixel or the second sub-pixel in each sub-pixel group through the selection line in the group;

A plurality of data lines extend along the first direction, and each sub-pixel group of the OLED pixel corresponds to a data line, and each data line is respectively connected to the driving circuit corresponding to each sub-pixel group in the OLED pixel, through the The data line transmits a signal corresponding to the luminous intensity to the first sub-pixel or the second sub-pixel in each sub-pixel group to drive each sub-pixel to emit light;

A plurality of row scanning lines extending along a second direction different from the first direction, a plurality of OLED pixels located in the second direction share a row scanning line, and the row scanning lines are all connected to each sub-pixel group in the OLED pixel Each corresponding driving circuit controls whether each sub-pixel group of the OLED pixel simultaneously receives a signal on each corresponding data line through the row scanning line.

Optionally, the signal for transmitting luminous intensity is a voltage, current or digital pulse control signal.

As mentioned above, an OLED pixel and a display panel using the OLED pixel of the present invention have the following beneficial effects:

The OLED pixel of the present invention includes three groups of sub-picture units, and each sub-picture unit includes a first sub-picture unit and a second sub-picture unit that share a driving circuit and have a complementary light-emitting wavelength band, that is, the sub-picture unit of the present invention The OLED pixel includes six kinds of sub-pixels, and at the same time, the sum of the light-emitting wavelength bands of the first sub-pixels in each sub-pixel group is the white light band. Further, the present invention utilizes the principle of light diffraction to form the sub-pixels in the form of a combination of a white OLED luminous body, a light splitter and a light baffle.

The OLED pixel of the present invention utilizes the CMY imaging system including C sub-pixels, M sub-pixels and Y sub-pixels to realize the color imaging of the OLED display panel, and retains the traditional sense including R sub-pixels, G sub-pixels and B sub-pixels. The sub-pixel RGB imaging system performs compensation imaging to ensure color saturation.

Compared with the traditional three OLED color imaging principles, the six sub-pixels of the present invention all use white light OLED illuminants, thus avoiding the color distortion caused by the aging degree of different materials; at the same time, due to the increased The three sub-pixels of the C sub-pixel, M sub-pixel and Y sub-pixel of the CMY imaging system are coordinated to perform imaging processing, thereby improving the luminous efficiency of the OLED pixel, thereby reducing power consumption, and the present invention ensures color saturation Under the condition that the brightness is constant, in the ideal case (when only C sub-pixels, M sub-pixels and Y sub-pixels are used to emit light), the power consumption of OLED pixels of the present invention can reach that of conventional OLED pixels using optical filters. Further, since the first sub-pixel and the second sub-pixel in each sub-pixel group of the present invention share a drive circuit, the area ratio of the circuit part in the OLED pixel is reduced, thereby improving the OLED pixel The ratio of the effective light-emitting area is beneficial to reduce the pixel size of the OLED display panel, so as to improve the resolution of the OLED display panel of the present invention.

Description of drawings

FIG. 1 is a schematic diagram showing the distribution of each sub-pixel group and each sub-pixel in an OLED pixel of the present invention.

FIG. 2 is a schematic diagram showing the specific structure of the light splitter in the sub-pixel and the principle of light transmission in the sub-pixel according to the present invention.

FIG. 3 is a schematic diagram showing the structure of the R sub-pixel of the present invention.

FIG. 4 is a schematic structural diagram of the sub-pixel C of the present invention.

FIG. 5 is a schematic diagram showing the connection relationship between an OLED pixel and its corresponding selection line, data line and row scanning line in the group in the display panel using OLED pixels according to the present invention.

FIG. 6 is a schematic diagram showing the connection relationship between a plurality of OLED pixels and their corresponding selection lines, data lines and row scanning lines in the group in the display panel using OLED pixels according to the present invention.

Component designation description

Detailed ways

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

See Figures 1 through 6. It should be noted that the illustrations provided in the following specific embodiments are only schematically illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the drawings rather than the number and shape of components in actual implementation. and size drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the component layout type may also be more complex.

There are three main methods used by traditional OLEDs to display color images: 1. Use different luminescent materials to achieve RGB three-color luminescence. However, the disadvantage of this method is that the luminescent materials must be optimized for different colors. , and the luminous layers of different materials have differences in service life, and different aging degrees make the display color distorted; 2. Use white luminescent materials, and then add filters to produce RGB three-color light, but this way The disadvantage is that the energy utilization efficiency is low, and the light energy after passing through the filter is lost to 30%-50%; 3. Use a blue luminescent material, and then use a color conversion medium to generate RGB three-color light. However, this kind of The disadvantages of the method are similar to those of the first method, and there is also the problem of the life of the color conversion medium and the need for a stable blue luminescent material. Therefore, it is urgent to solve the problem of eliminating the color distortion caused by the life difference of different luminescent materials and different color conversion materials while improving the luminous efficiency.

In view of this, the present invention provides an OLED pixel and a display panel using the OLED pixel. The OLED pixel of the present invention includes three groups of sub-pixel groups, and each sub-pixel group includes a common driving circuit and emits light. The wavelength band is the first sub-pixel and the second sub-pixel in a complementary relationship, that is, the OLED pixel of the present invention includes six sub-pixels, and at the same time, the sum of the light-emitting bands of the first sub-pixels in each sub-pixel group is white light band. Further, the present invention utilizes the principle of light diffraction to form the sub-pixels in the form of a combination of a white OLED luminous body, a light splitter and a light baffle. The OLED pixel of the present invention utilizes the CMY imaging system including C sub-pixels, M sub-pixels and Y sub-pixels to realize the color imaging of the OLED display panel, and retains the traditional sense including R sub-pixels, G sub-pixels and B sub-pixels. The sub-pixel RGB imaging system performs compensation imaging to ensure color saturation.

Compared with the traditional three OLED color imaging principles, the six sub-pixels of the present invention all use white light OLED illuminants, thus avoiding the color distortion caused by the aging degree of different materials; at the same time, due to the increased The three sub-pixels of the C sub-pixel, M sub-pixel and Y sub-pixel of the CMY imaging system are coordinated to perform imaging processing, thereby improving the luminous efficiency of the OLED pixel, thereby reducing power consumption, and the present invention ensures color saturation Under the condition that the brightness is constant, in the ideal case (when only C sub-pixels, M sub-pixels and Y sub-pixels are used to emit light), the power consumption of OLED pixels of the present invention can reach that of conventional OLED pixels using optical filters. Further, since the first sub-pixel and the second sub-pixel in each sub-pixel group of the present invention share a drive circuit, the area ratio of the circuit part in the OLED pixel is reduced, thereby improving the OLED pixel The ratio of the effective light-emitting area is beneficial to reduce the pixel size of the OLED display panel, so as to improve the resolution of the OLED display panel of the present invention. The principle and implementation of the OLED pixel and the display panel using the OLED pixel of the present invention will be described in detail below, so that those skilled in the art can understand the OLED pixel of the present invention and the display panel using the OLED pixel without creative work.

Embodiment one

As shown in FIG. 1 to FIG. 4 , the present invention provides an OLED pixel 100 at least including: a first sub-pixel group 1, a third sub-pixel group 3, and a second sub-pixel group located between the first and third sub-groups. Sub-pixel group 2. The OLED pixel 100 is rectangular, and in this embodiment, preferably, the OLED pixel 100 is square.

Wherein, each sub-pixel group includes a first sub-pixel and a second sub-pixel that share a driving circuit (see Figure 5 of Embodiment 2 for details), and each of the first sub-pixel and the second sub-pixel Pixels are all connected to their corresponding drive circuits, as shown in Figure 1, the first sub-pixel group 1 includes the first sub-pixel 11 of the first sub-pixel group and the second sub-image of the first sub-pixel group Unit 12, the second sub-pixel group 2 includes the first sub-pixel 21 of the second sub-pixel group and the second sub-pixel 22 of the second sub-pixel group, and the third sub-pixel group 3 includes the third sub-pixel The first sub-pixel 31 of the group and the second sub-pixel 32 of the third sub-pixel group.

Further, the first sub-pixel and the second sub-pixel in each sub-pixel group include white light OLED illuminants, as well as spectroscopic plates and light baffles corresponding to each other as required, so that the first sub-pixel The sum of the light-emitting bands of the second sub-pixel and the second sub-pixel is the white light band, that is, the light-emitting bands of the first sub-pixel and the second sub-pixel in each sub-pixel group are complementary; The sum of the light-emitting wavelength bands of the first sub-pixel is the white light band; there is a sufficient distance between each sub-pixel to prevent the output light of the sub-pixel from entering the beam splitter of the adjacent sub-pixel, and avoid causing a gap between adjacent sub-pixels. Crosstalk between.

It should be noted that, compared with the traditional three OLED color imaging principles, the six sub-pixels of the present invention all use white OLED light emitters, thus avoiding the color distortion caused by the aging degree of different materials.

It should be further pointed out that since the first sub-pixel and the second sub-pixel in each sub-pixel group share a driving circuit, the area ratio of the circuit part in the OLED pixel is reduced, thereby increasing the effective light-emitting area of the OLED pixel. The ratio is beneficial to reduce the pixel size of the OLED display panel using the OLED pixel of the present invention, so as to improve the resolution of the OLED display panel of the present invention.

It should be noted that, as shown in Figure 2, the corresponding beam splitter in each sub-pixel group is trapezoidal; the material of the beam splitter is a silicon nitride transparent material; the difference between the beam splitters corresponding to different wave bands is that their The difference in geometric size, in each sub-pixel, by adjusting the size of the beam splitter F2 (including the length of the upper base of the beam splitter m2, the length of the lower base m1, and the height d1) and the distance between the beam splitter and the white OLED light emitter F1 The relative distance d2 is used to make the spectroscopic sheet output light corresponding to a specific wavelength band, wherein the ranges of the parameters m2, m1, d1 and d2 depend on the size of the OLED pixel matched therewith.

It should be further explained that, as shown in Figure 2, the present invention uses the principle of light diffraction to divide the light L0 output by the white OLED light emitter into three beams L1, L2 and L3 by using a spectroscopic sheet of a specific geometric size, wherein , the light L1 in the middle is the light obtained after filtering out the light of a specific wavelength (determined by the wavelength band corresponding to the spectroscopic sheet F1), and the two light beams L2 and L3 on both sides are light of a specific wavelength.

It should be pointed out that in each sub-pixel group, the respective spectroscopic sheets of the first sub-pixel and the second sub-pixel correspond to the same wave band; in each sub-pixel group, the first and second sub-images The light baffle in the unit is used to block part of the light output by the light splitter in the first and second sub-pixels, and through selective blocking, adjust the light baffle in the first and second sub-pixels The position is a relative complementary relationship, so that the respective light splitters in the first and second sub-pixels cooperate with the light baffle, so that the wavelength bands of the output light of the first and second sub-pixels are complementary, that is, realize The sum of the luminous wavelength bands of the first and second sub-pixels is the white light band.

It should be pointed out that the size of each sub-pixel group is not limited to be equal; the size of the first sub-pixel and the second sub-pixel in each sub-pixel group is not limited to be equal; each sub-image There is no restriction whether the sizes of the corresponding white OLED light emitters in the first sub-pixel and the second sub-pixel of the tuple are equal; there is also no restriction whether the sizes of the corresponding white OLED light emitters in different sub-pixel groups are equal. Meanwhile, the shape of the white OLED light emitter is not specifically limited.

In this embodiment, as shown in FIG. 1, FIG. 1 shows a schematic diagram of the distribution of sub-pixel groups and sub-pixels in an OLED pixel. The OLED pixel 100 includes six types of sub-pixels. Among these six types of sub-pixels , the first sub-pixel in the three groups of sub-pixels forms a set of imaging system containing three kinds of sub-pixels, and the second sub-pixel in the remaining three groups of sub-pixels forms another set of imaging system containing three kinds of sub-pixels The imaging system of the pixel, in this embodiment, that is, the six sub-pixels of OLED pixel 100 are divided into RGB imaging system (including R sub-pixel 11, G sub-pixel 21 and B sub-pixel 31) and CMY imaging System (including C sub-pixel 12, M sub-pixel 22 and Y sub-pixel 32), details are as follows:

The first sub-pixel 11 of the first sub-pixel group 1 is an R sub-pixel, and the second sub-pixel 12 of the first sub-pixel group 1 is a C sub-pixel; the second sub-pixel The first sub-pixel 21 of the tuple group 2 is a G sub-pixel, and the second sub-pixel 22 of the second sub-pixel group 2 is an M sub-pixel; the first sub-pixel of the third sub-pixel group 3 The pixel 31 is a B sub-pixel, and the second sub-pixel 31 of the third sub-pixel group 3 is a Y sub-pixel. Among them, R (Red) sub-pixel is red light sub-pixel; G (Green) sub-pixel is green light sub-pixel; B (Blue) sub-pixel is blue light sub-pixel; C (Cyan) sub-pixel Cyan light sub-pixel; M (Magenta) sub-pixel is magenta light sub-pixel; Y (Yellow) sub-pixel is yellow light sub-pixel. Wherein, the waveband corresponding to the cyan light is the sum of the blue light waveband and the green light waveband, that is, C (Cyan) = B (Blue) + G (Green); the waveband corresponding to the magenta light is the red light waveband and the blue light waveband The sum of the bands, that is, M (Magenta) = R (Red) + B (Blue); the band corresponding to the yellow light is the sum of the red and green bands, that is, Y (Yellow) = R (Red) +G (Green), for details, please refer to the detailed description of the subsequent principles in this embodiment.

Therefore, for the first, second and third sub-pixel groups of this embodiment, it satisfies: the sum of the light-emitting wavelength bands of the first sub-pixel and the second sub-pixel in each sub-pixel group is the white light band , that is, the luminous wavelength bands of the first sub-pixel and the second sub-pixel in each sub-pixel group are in a complementary relationship; the sum of the luminous wavelength bands of the first sub-pixel in each sub-pixel group is a white light band. At the same time, in this embodiment, there is a sufficient distance between the sub-pixels to prevent the output light of the sub-pixels from entering the beam splitters of the adjacent sub-pixels, so as to avoid causing crosstalk between adjacent sub-pixels.

It should be noted that, in this embodiment, it is preferable that the sizes of the sub-pixel groups in this embodiment are equal, and at the same time, the first and second sub-pixel sizes in each of the sub-pixel groups are equal. Further, each sub-pixel group The dimensions of the white OLED light emitters in the sub-pixels are equal. But not limited to this, the size of each sub-pixel group can also be unequal; the first sub-pixel and the second sub-pixel size in each sub-pixel group can also be unequal; each sub-pixel The sizes of the corresponding white OLED light emitters in the first sub-pixel and the second sub-pixel of a group may also be unequal; the sizes of the corresponding white OLED light emitters in different sub-pixel groups may also be unequal. However, when the relevant dimensions are not equal, then it is necessary to adjust the correlation coefficient according to the corresponding different dimensions when determining whether the CMY imaging system involved in this embodiment needs RGB system compensation and the degree of power consumption reduction of the OLED pixel of the present invention, that is, Correlation results need to be corrected with the relative size as a coefficient.

It should be further explained that in this embodiment, the shape of the beam splitter is preferably an isosceles trapezoid, the purpose is to simplify the light splitting effect, so that the energy of the light output by the beam splitter on the left and right sides is equal and the band spectrum is consistent, which is conducive to simplifying each The layout of structures in this subcell. But not limited thereto, the shape of the light splitter can also be a general trapezoid, but the corresponding light splitting effect is more complicated, and the classification layout of each sub-pixel needs to be adjusted accordingly.

The following only takes the first sub-pixel group 1 as an example to describe in detail. The situation of the second and third sub-pixel groups is similar to that of the first sub-pixel group, and the same parts will not be repeated one by one.

As shown in Figure 1, Figure 3 and Figure 4, the first sub-pixel group 1 includes the first sub-pixel 11 (R sub-pixel) and the second sub-pixel that share a drive circuit (see Figure 5 for details) Unit 12 (C sub-pixel), and both the R sub-pixel and the C sub-pixel are connected to their corresponding driving circuits (see Figure 5 in Embodiment 2 for details).

FIG. 3 shows a schematic diagram of the structure of R sub-pixels. In FIG. 3 , the R sub-pixel 11 includes a white OLED light emitter 111 , a red light splitter 112 and a light baffle 4 . Wherein, the red light splitter 112 corresponds to the red light band, that is, the light of a specific wavelength output by the red light splitter 112 is red light.

The principle of the optical path in Fig. 3 is as follows: the white light (W, White) output by the white light OLED illuminant 111 passes through the red light splitter 112 and is divided into three beams of light, among which the middle beam is the white light minus the red light. light (W-R), that is, cyan light (C, Cyan), and the light beams located on the left and right sides are all red light, because in this embodiment, the light splitter 112 is an isosceles trapezoid, so the red lights located on the left and right sides are respectively original One-half of the red light component in the energy of white light, that is, the two beams of red light on both sides are both 0.5*R.

For the R sub-pixel 11 , red light (R) needs to be output, therefore, the cyan light (C, Cyan) located in the middle is selectively blocked to form the R sub-pixel 11 .

Similarly, FIG. 4 shows a schematic structural diagram of the C sub-pixel. In FIG. 4 , the C sub-pixel 12 includes a white OLED light emitter 121, a red light splitter 122 and a light baffle 4, wherein the red light splitter 122 of the C sub-pixel 12 and the red light of the R sub-pixel 11 The light splitters 112 correspond to the same wavelength band, both of which correspond to the red light band, that is, the lights of specific wavelengths output by the red light splitters 112 and 122 are both red light.

The principle of the optical path in FIG. 4 is similar to that in FIG. 3 , the difference is only in the position of the light blocking plate 4 . Since the C sub-pixel 12 needs to output cyan light (C), it selectively blocks the red light (0.5*R) on both sides, where the position of the light baffle 4 in FIG. 4 is the same as that of the light baffle 4 in FIG. 3 The positions are relatively complementary, so that the C sub-pixel 12 is formed in FIG. 4 , and the R sub-pixel 11 is formed in FIG. 3 , and the sum of the luminescent wavelength bands of the R sub-pixel 11 and the C sub-pixel 12 is a white light band.

As mentioned above, since the red light splitter, the green light splitter and the blue light splitter in this embodiment are all isosceles trapezoidal, then for the second and third sub-pixel groups, according to the same principle, using green light After the beam splitter, a beam of magenta light (M, Magenta) in the middle and two beams of green light (0.5*G) on both sides are obtained, and through the selective blocking of the light baffle, the sum of the light-emitting bands is G in the white light band. Sub-pixel and M sub-pixel; after using the blue light splitter, a beam of yellow light (Y, Yellow) in the middle and two beams of blue light (0.5*B) on both sides are obtained, and the selective Blocking, realizing that the sum of the light-emitting bands is the B sub-pixel and the Y sub-pixel of the white light band. Further, since white light (W) is equally divided into red light (R, Red) wave band, green light (G, Green) wave band and blue light (B, Blue) wave band on the wave band, the angle of the above-mentioned light in the wave band coverage satisfies C=B+G; M=R+B; Y=R+G.

It should be noted that, in this embodiment, the sum of the light-emitting wavelength bands of the first sub-pixels (R sub-pixel 11, G sub-pixel 21, and B sub-pixel 31) in each sub-pixel group is the white light band ; At the same time, there is a sufficient distance between the sub-pixels to prevent the output light of the sub-pixels from entering the light splitter of the adjacent sub-pixels, so as to avoid causing crosstalk between adjacent sub-pixels.

It needs to be further explained that the difference of the spectroscopic sheets corresponding to different wave bands lies in the difference in their geometric dimensions. In each sub-pixel, by adjusting the size of the spectroscopic sheet (including the upper base length m1, height d1) and the relative distance between the spectroscopic sheet and the white OLED light emitter (including the upper bottom length m2 of the spectroscopic sheet, the lower bottom length m1, and the height d1), so that the spectroscopic sheet outputs light of a preset wavelength band, Wherein, the ranges of the parameters m2, m1, d1 and d2 depend on the size of the matched OLED pixel. In this embodiment, the red light splitter, the green light splitter and the blue light splitter are all isosceles trapezoidal, for a square white OLED emitter with a side length of 50 μm, preferably, for the red light splitter: The length m1 of the lower base is about 43 μm, the length m2 of the upper base is about 33 μm, the height d is about 114 μm, and the distance d2 between the red light splitter and the white OLED emitter is 40 μm; for the green light splitter: M1 is about 40 μm, m2 is about 35 μm, d1 is about 67 μm, and d2 is about 40 μm; for the blue light splitter: m1 is about 34 μm, m2 is about 30 μm, d1 is about 42 μm, and d2 is about 40 μm.

In order to enable those skilled in the art to further understand the principles, implementation methods and beneficial effects of the present invention, a detailed analysis of relevant content will be carried out below.

The reason why the present invention improves luminous efficiency is that:

In the process of using the OLED pixel of the present invention to image and display light of a specific color (band), since the first sub-pixel and the second sub-pixel in each sub-pixel group of the present invention share a drive circuit, only One sub-pixel in each sub-pixel group emits light, that is, the present invention selects three kinds of sub-pixels from six kinds of sub-pixels to work. Further, since the first sub-pixel and the second sub-pixel in each sub-pixel group of the present invention share a driving circuit, the area ratio of the circuit part in the OLED pixel is reduced, thereby increasing the effective light-emitting area of the OLED pixel. The ratio is beneficial to reduce the size of the pixels in the OLED display panel, so as to improve the resolution of the OLED display panel of the present invention.

In this embodiment, as shown in FIG. 1 , the six sub-pixels of OLED pixel 100 are divided into RGB imaging system (including R sub-pixel 11, G sub-pixel 21 and B sub-pixel 31) and CMY imaging system ( Including C sub-pixel 12, M sub-pixel 22 and Y sub-pixel 32).

Therefore, in the process of using the OLED pixel of the present invention to image and display light of a specific color (band), the three sub-pixels that perform light-emitting work can all be selected from the RGB imaging system or the CMY imaging system, or from the RGB imaging system and the CMY imaging system. CMY imaging systems are combined to select the three required sub-pixels.

And because the composition of white light (W) can be equally divided into three parts: red light band (R), green light band (G) and blue light band (B), as mentioned above, the white light is divided into three beams after passing through the beam splitter , for the red light splitter, green light splitter or blue light splitter, the middle light (a certain sub-pixel in the CMY imaging system) after passing through the splitter accounts for 2/3 of the total energy of the original white light, while The two beams of light of a specific wavelength (a certain sub-pixel of the RGB imaging system) separated towards the two sides account for 1/3 of the total energy.

Therefore, in the process of using the OLED pixel of the present invention to image and display light of a specific color (wavelength band), when the three sub-pixels that perform light-emitting work are all selected from the RGB imaging system, the present invention is different from the traditional OLED using filters. The pixels have the same luminous efficiency; but when the three sub-picture units for luminous work in the present invention are all selected from the CMY imaging system, the luminous efficiency of the present invention is twice that of OLED pixels that traditionally use optical filters. In other words, At this time, the power consumption of the OLED pixel of the present invention can reach half of the power consumption of the traditional OLED pixel using a filter.

Since the present invention increases the C sub-pixel, M sub-pixel and Y sub-pixel of the CMY imaging system to coordinate imaging processing, thereby improving the luminous efficiency of OLED pixels and reducing power consumption, in the present invention Under the condition that the color saturation remains unchanged, in the most ideal case (when only C sub-pixels, M sub-pixels and Y sub-pixels are used to emit light), the power consumption of the OLED pixel of the present invention can reach that of the conventional optical filter Half the power consumption of an OLED pixel.

The principle when concrete imaging of the present invention is as follows:

When imaging and displaying, the present invention converts the luminous intensity data of the original RGB three colors into luminous intensity data corresponding to the CMY three colors, and uses lowercase letters to represent the luminous intensity of the corresponding sub-pixel, because in this embodiment, each sub-image The size of the corresponding white light OLED emitter in the first sub-pixel and the second sub-pixel of the tuple group, and the size of the first sub-pixel and the second sub-pixel in each sub-pixel group are all equal, and at the same time, each The beam splitters are all isosceles trapezoidal, so the following relational formula for luminous intensity conversion can be obtained:

c=0.5*(g+b-r)

m=0.5*(g+r-b)

y=0.5*(r+b-g)

It can be known from the above relational formula that when the OLED pixel of the present invention is used to display light of a specific color (band):

Among the RGB three primary colors of the pre-displayed light, when the luminous intensity of a certain primary color is less than the sum of the luminous intensities of the other two primary colors, the three luminous intensity values of c, m and y after conversion are all greater than 0, then only Using the CMY imaging system, that is, only using the corresponding combination of the C sub-pixel 12, the M sub-pixel 22 and the Y sub-pixel 32, the light of the pre-display band can be formed, in other words, if the converted c, m and y three If each luminous intensity value is greater than 0, the pre-displayed light of a specific color can be well restored;

Among the RGB three primary colors of the pre-displayed light, when the luminous intensity of a certain primary color is greater than the sum of the luminous intensities of the other two primary colors, there will be a certain value in the converted three luminous intensity values of c, m and y is a negative value. For example, when the luminous intensity r of the R primary color exceeds the sum of the luminous intensity b of the B primary color and the luminous intensity g of the G primary color among the RGB three primary colors of the pre-displayed light, that is, r>b+g, then c is a negative value , at this time, it shows that the method of simply using the CMY imaging system, that is, simply using the corresponding combination of the C sub-pixel 12 , the M sub-pixel 22 and the Y sub-pixel 32 cannot normally restore the pre-displayed specific color light. The same problem also occurs when the luminous intensity b of the B primary color or the luminous intensity g of the G primary color exceeds the sum of the luminous intensities of the other two primary colors. Therefore, when one of the three luminous intensity values of c, m, and y is negative, it is necessary to use the RGB imaging system, that is, the R sub-pixel 11, the G sub-pixel 21 and the B sub-pixel 31 to compensate, so as to ensure The color saturation of the pre-displayed light of a particular color.

For example, for the pre-displayed specific color of light, when the luminous intensity r of the required R primary color is very large (r>b+g), because the angle of the aforementioned light on the band coverage satisfies C=B+G; M=R +B; Y=R+G, so after using M sub-pixel 22 to provide blue light (B) and part of red light (R), and using Y sub-pixel 32 to provide green light (G) and part of red light (R) Since many R primary colors are required, it is also necessary to use the R sub-pixel 11 to provide additional required red light for compensation, so as to ensure the color saturation of the pre-displayed light of a specific color.

Embodiment two

The present invention also provides an OLED display panel, at least comprising: a plurality of OLED pixels as described in Embodiment 1, a plurality of selection lines within a group, a plurality of data lines, and a plurality of row scanning lines.

The OLED pixels are as described in Embodiment 1, and will not be described in detail here.

The multiple selection lines in the group extend along the first direction, each sub-pixel group of each OLED pixel corresponds to a selection line in the group, and each selection line in the group is connected to each sub-pixel group in the OLED pixel respectively Each corresponding driving circuit controls the driving circuit to communicate with the first sub-pixel or the second sub-pixel in each sub-pixel group through the selection line within the group.

The plurality of data lines extend along the first direction, and each sub-pixel group of each OLED pixel corresponds to a data line, and each data line is respectively connected to a driving circuit corresponding to each sub-pixel group in the OLED pixel, The signal corresponding to the luminous intensity is transmitted to the first sub-pixel or the second sub-pixel in each sub-pixel group through the data line to drive each sub-pixel to emit light, wherein the signal for transmitting the luminous intensity is Voltage, current or digital pulse control signal.

The plurality of row scanning lines extend along a second direction different from the first direction, a plurality of OLED pixels located in the second direction share a row scanning line, and the row scanning lines are connected to each sub-image in the OLED pixel The driving circuit of the tuple controls whether the sub-picture tuple groups of the OLED pixels simultaneously receive signals on their corresponding data lines through the row scanning lines.

In this embodiment, as shown in FIG. 5, only one OLED pixel 100 is taken as an example for illustration in FIG. The connection relationship of the scan lines, and the working principle of the OLED display panel using the OLED pixel 100 will be introduced later.

In FIG. 5 , the selection lines within the group extend along the first direction (longitudinal direction), and the first, second and third sub-pixel groups of the OLED pixel 100 respectively correspond to one selection line within the group, specifically, the first sub-pixel group R sub-pixel 11 and C sub-pixel 12 of the pixel group correspond to the same selection line in the group. Similarly, G sub-pixel 21 and M sub-pixel 22 of the second sub-pixel group correspond to the same selection line in the group The B sub-pixel 31 and the Y sub-pixel 32 of the third sub-pixel group correspond to the same selection line in the group; each selection line in the group is respectively connected to the first, second and third sub-pixels in the OLED pixel 100 Each group corresponds to a driving circuit, and controls the driving circuit to communicate with the first sub-pixel or the second sub-pixel in each sub-pixel group through the selection line in the group.

In FIG. 5 , the data lines all extend along the first direction (longitudinal direction), and the first, second and third sub-pixel groups of the OLED pixel 100 respectively correspond to one data line, specifically, the first sub-pixel group R sub-pixel 11 and C sub-pixel 12 correspond to the same data line. Similarly, G sub-pixel 21 and M sub-pixel 22 of the second sub-pixel group correspond to the same data line, and the third sub-pixel group The B sub-pixel 31 and the Y sub-pixel 32 correspond to the same data line; each data line is respectively connected to the driving circuits corresponding to the first, second and third sub-pixel groups in the OLED pixel 100, and passes through the The data line transmits a signal corresponding to the luminous intensity to the first sub-pixel or the second sub-pixel in each sub-pixel group to drive each sub-pixel to emit light, wherein, in this embodiment, preferably the transmission luminescence The signal of strength is voltage.

In FIG. 5 , the row scanning lines extend along a second direction (horizontal direction) different from the first direction, and the OLED pixels 100 located in the second direction correspond to one row scanning line, and the row scanning lines are connected to To the driving circuits corresponding to each sub-pixel group in the OLED pixel 100, control whether each sub-pixel group of the OLED pixel 100 simultaneously receives the signal on the corresponding data line through the row scanning line.

The working principle of the OLED display panel using the OLED pixel 100 is as follows:

When the row selection signal transmitted on the row scanning line selects a certain row in the OLED display panel of the present invention, all the OLED pixels (including the OLED pixel 100 ) in the row simultaneously receive the luminous intensity corresponding to the respective corresponding data lines. signal (such as a voltage signal); for a certain OLED pixel in the row, in this embodiment, there are three data lines for the OLED pixel 100 to receive the signal corresponding to the luminous intensity. There are also three corresponding selection lines in the group, and each selection line in the group respectively controls the drive circuits corresponding to each sub-pixel group in the OLED pixel 100 to connect and drive the R sub-pixel 11 or C sub-pixel 12 respectively, so The G sub-pixel 21 or M sub-pixel 22 mentioned above, and the B sub-pixel 31 or Y sub-pixel 32 are used to control three of the six sub-pixels to perform light emitting work.

Further, FIG. 6 in this embodiment also provides a case where there are multiple OLED pixels in the display panel to which the OLED pixel is applied, including four OLED pixels of OLED pixel 100, OLED pixel 200, OLED pixel 300, and OLED pixel 400. , wherein, there is no limit to whether the relative positions of the first and second sub-pixels in each sub-pixel group in each OLED pixel should be consistent, for example, in the corresponding sub-pixel groups in the four OLED pixels in Figure 6 The relative positions of the first and second sub-pixels are not consistent. Further, the specific connection manner and working principle of each OLED pixel are similar to those of a single OLED pixel 100, and will not be repeated here.

In summary, the OLED pixel of the present invention includes three groups of sub-pixel groups, and each sub-pixel group includes a first sub-pixel and a second sub-pixel that share a driving circuit and have a complementary luminous wavelength band. , that is, the OLED pixel of the present invention includes six kinds of sub-pixels, and at the same time, the sum of the light-emitting wavelength bands of the first sub-pixels in each sub-pixel group is the white light band. Further, the present invention utilizes the principle of light diffraction to form the sub-pixels in the form of a combination of a white OLED luminous body, a light splitter and a light baffle. The OLED pixel of the present invention utilizes the CMY imaging system including C sub-pixels, M sub-pixels and Y sub-pixels to realize the color imaging of the OLED display panel, and retains the traditional sense including R sub-pixels, G sub-pixels and B sub-pixels. The sub-pixel RGB imaging system performs compensation imaging to ensure color saturation. Compared with the traditional three OLED color imaging principles, the six sub-pixels of the present invention all use white light OLED illuminants, thus avoiding the color distortion caused by the aging degree of different materials; at the same time, due to the increased The three sub-pixels of the C sub-pixel, M sub-pixel and Y sub-pixel of the CMY imaging system are coordinated to perform imaging processing, thereby improving the luminous efficiency of the OLED pixel, thereby reducing power consumption, and the present invention ensures color saturation Under the condition that the brightness is constant, in the ideal case (when only C sub-pixels, M sub-pixels and Y sub-pixels are used to emit light), the power consumption of OLED pixels of the present invention can reach that of conventional OLED pixels using optical filters. Further, since the first sub-pixel and the second sub-pixel in each sub-pixel group of the present invention share a drive circuit, the area ratio of the circuit part in the OLED pixel is reduced, thereby improving the OLED pixel The ratio of the effective light-emitting area is beneficial to reduce the pixel size of the OLED display panel, so as to improve the resolution of the OLED display panel of the present invention. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (11)

1. an OLED pixel, is characterized in that, described OLED pixel at least comprises: the first sub-pixed mapping group, the 3rd sub-pixed mapping group and in first and the 3rd the second sub-pixed mapping group between sub-pixed mapping group;

Each sub-pixed mapping group comprises the first sub-pixed mapping and second sub-pixed mapping of shared one drive circuit;

In each sub-pixed mapping group, the first sub-pixed mapping and the second sub-pixed mapping include white light OLED luminous element, light splitting piece and light barrier, to make the luminescence band summation of the first described sub-pixed mapping and the second sub-pixed mapping for white light wave band;

The luminescence band summation of the first sub-pixed mapping respectively in this sub-pixed mapping group is white light wave band;

Respectively there is enough distances with the light splitting piece preventing the output light of sub-pixed mapping from entering adjacent sub-pixed mapping between this sub-pixed mapping, avoid causing the crosstalk between adjacent sub-pixed mapping.

2. OLED pixel according to claim 1, it is characterized in that: in each sub-pixed mapping group, the corresponding identical wave band of first sub-pixed mapping and the second sub-pixed mapping light splitting piece separately, and be relative complementary relationship by the position of light barrier in first, second sub-pixed mapping described in adjustment, described light splitting piece and light barrier are cooperatively interacted, and the first sub-pixed mapping described in realization and the luminescence band summation of the second sub-pixed mapping are white light wave band.

3. OLED pixel according to claim 2, is characterized in that: the first sub-pixed mapping of described first sub-pixed mapping group is R sub-pixed mapping, and the second sub-pixed mapping of described first sub-pixed mapping group is C sub-pixed mapping; First sub-pixed mapping of described second sub-pixed mapping group is G sub-pixed mapping, and the second sub-pixed mapping of described second sub-pixed mapping group is M sub-pixed mapping; First sub-pixed mapping of described 3rd sub-pixed mapping group is B sub-pixed mapping, and the second sub-pixed mapping of described 3rd sub-pixed mapping group is Y sub-pixed mapping; Wherein, R sub-pixed mapping is ruddiness sub-pixed mapping, and G sub-pixed mapping is green glow sub-pixed mapping, and B sub-pixed mapping is blue light sub-pixed mapping, and C sub-pixed mapping is cyan light sub-pixed mapping, and M sub-pixed mapping is pinkish red coloured light sub-pixed mapping, and Y sub-pixed mapping is sodium yellow sub-pixed mapping.

4. the OLED pixel according to claim 1,2 or 3, is characterized in that: respectively the size of this sub-pixed mapping group is equal.

5. OLED pixel according to claim 4, is characterized in that: the first sub-pixed mapping in each sub-pixed mapping group is equal with the second sub-pixed mapping size.

6. OLED pixel according to claim 5, is characterized in that: white light OLED luminous element size corresponding in the first sub-pixed mapping in each sub-pixed mapping group and the second sub-pixed mapping is equal.

7. the OLED pixel according to claim 1,2 or 3, is characterized in that: described light splitting piece corresponding in each sub-pixed mapping group is trapezoidal.

8. OLED pixel according to claim 7, is characterized in that: described light splitting piece is isosceles trapezoid.

9. the OLED pixel according to claim 1,2 or 3, is characterized in that: the material of described light splitting piece is silicon nitride transparent material.

10. an OLED display panel, is characterized in that, described OLED display panel at least comprises:

Multiple OLED pixel as in one of claimed in any of claims 1 to 9;

Line is selected in many groups, extend along first direction, respectively each sub-pixed mapping group of this OLED pixel corresponding group interior selection line respectively, select line to be connected to each self-corresponding drive circuit of each sub-pixed mapping group in OLED pixel respectively in every bar group, in described group, select drive circuit described in line traffic control to be communicated with the first sub-pixed mapping in each sub-pixed mapping group or the second sub-pixed mapping;

A plurality of data lines, extend along first direction, respectively each sub-pixed mapping group of this OLED pixel corresponding data wire respectively, every bar data wire is connected to each self-corresponding drive circuit of each sub-pixed mapping group in OLED pixel respectively, transmits signal corresponding to luminous intensity to drive respectively this sub-pixed mapping luminous by described data wire to the first sub-pixed mapping in each sub-pixed mapping group or the second sub-pixed mapping;

Many horizontal scanning lines, extend along the second direction being different from first direction, multiple OLED pixel be positioned in second direction shares a horizontal scanning line, described horizontal scanning line is all connected to each self-corresponding drive circuit of each sub-pixed mapping group in OLED pixel, whether receives the signal on each self-corresponding data wire by respectively this sub-pixed mapping group of described horizontal scanning line control OLED pixel simultaneously.

11. OLED display panel according to claim 10, is characterized in that: the signal of described transmission luminous intensity is voltage, electric current or digit pulse control signal.