CN111653681A - Optical spacer and display panel - Google Patents
Optical spacer and display panel Download PDFInfo
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- CN111653681A CN111653681A CN202010130393.3A CN202010130393A CN111653681A CN 111653681 A CN111653681 A CN 111653681A CN 202010130393 A CN202010130393 A CN 202010130393A CN 111653681 A CN111653681 A CN 111653681A
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- display panel
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- spacer
- light
- substrate
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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Abstract
The present disclosure provides an optical spacer for a display panel, wherein the optical spacer includes a spacer body and a plurality of adjusting particles dispersed in the spacer body, and an absorption rate of the adjusting particles to red light is greater than an absorption rate of the adjusting particles to light emitted from pixel units of other colors in the display panel. The present disclosure also provides a display panel having a small color shift at a large viewing angle, even without the color shift at the large viewing angle.
Description
Technical Field
The present disclosure relates to the field of display devices, and in particular, to a photo spacer and a display panel.
Background
With the progress of display technology, more and more apparatuses are provided with display devices. Meanwhile, the requirements of people on the display effect of the display device are becoming stricter. However, the following disadvantages are often present in the conventional display devices:
when viewed from the left and right side of the screen of the display device, one side is normally displayed and the other side emits red hair powder.
The color shift is called as viewing angle color shift, which affects the user experience and is a technical problem to be solved in the art.
Disclosure of Invention
An object of the present disclosure is to provide a photo spacer and a display panel, which can reduce or even eliminate viewing angle color shift in the display panel.
In order to achieve the above object, as one aspect of the present disclosure, there is provided an optical spacer for a display panel, wherein the optical spacer includes a spacer body and adjusting particles dispersed in the spacer body, and an absorption rate of the adjusting particles to red light is greater than that of the adjusting particles to light emitted from pixel cells of other colors in the display panel.
Optionally, the conditioning particles are nanoscale in size.
Optionally, the material from which the conditioning particles are made comprises chlorophyll a.
Optionally, the conditioning particles comprise metallic nanoparticles.
Optionally, the metal nanoparticles comprise gold nanoparticles, the diameter of which satisfies the following formula:
λred＝514.049+0.3778d(nm)；
wherein λ isredIs the wavelength of red light;
d is the diameter of the gold nanoparticles.
Optionally, the conditioning particles are made of a material selected from at least one of the following:
optionally, the conditioning particles are 5% to 10% by mass in the photo spacer.
As a second aspect of the present disclosure, a display panel is provided, where the display panel includes a first substrate and a second substrate, the first substrate and the second substrate are disposed opposite to each other, a plurality of pixel units are disposed on the first substrate, and the plurality of pixel units include a red pixel unit, where the display panel further includes a plurality of photo spacers, the photo spacers are the above photo spacers provided in the present disclosure, and the photo spacers are disposed between the first substrate and the second substrate and located at positions between the pixel units.
Optionally, the light spacer is disposed adjacent to the red pixel cell.
Optionally, the plurality of pixel cells further comprises a blue pixel cell and a green pixel cell, the optical spacer is disposed between the blue pixel cell and the red pixel cell; or the photo spacer is disposed between the red pixel unit and the green pixel unit.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic view of one embodiment of an optical spacer provided by the present disclosure;
shown in fig. 2 is a plot of the relative absorption intensity of chlorophyll a for different wavelengths of light;
fig. 3(a) shows absorption spectra of a film made of a material having a molecular formula of molecule 1, a film made of a material having a molecular formula of molecule 2, and a film made of a material having a molecular formula of molecule 3;
fig. 3(b) shows emission spectra of a film made of a material having a molecular formula of molecule 1, a film made of a material having a molecular formula of molecule 2, and a film made of a material having a molecular formula of molecule 3;
FIG. 4 shows the absorption and emission spectra of a film made of PtTPTBP and a film made of PtNTBP;
FIG. 5 is a schematic diagram illustrating an embodiment of a pixel arrangement in a display panel provided by the present disclosure;
FIG. 6 is a schematic diagram illustrating another embodiment of a pixel arrangement in a display panel provided by the present disclosure;
shown in fig. 7(a) are red L-decay curves of the display panel provided in the example and the display panel provided in the comparative example;
shown in fig. 7(b) are CIE loci of white light of the display panel provided in the example and the display panel provided in the comparative example.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
The viewing angle color shift is a color shift caused by the variation of the chromaticity and brightness of the three colors of red, green and blue of the display panel at different viewing angles. One of the factors that can be seen to affect color shift is the relative magnitude of the luminance decay of the three colors red, green, and blue at different angles. The main cause of variations in luminance and chromaticity is generally the variation in emission spectra of three light-emitting elements of three colors of red, green, and blue due to the microcavity effect. Usually, color cast improvement is realized by regulating and controlling a microcavity of a device, but the microcavity regulation needs to involve a device regulation structure, so that the operation is complex, and the color cast on two sides of a screen can be changed simultaneously because the device regulation is integral regulation, so that the problem of left and right color cast asymmetry is difficult to solve.
In view of the above, as an aspect of the present disclosure, there is provided an optical spacer for a display panel, wherein, as shown in fig. 1, the optical spacer includes a spacer body 110 and a modulation particle 120 dispersed in the spacer body 110, and an absorption rate of the modulation particle 120 to red light is greater than an absorption rate of the modulation particle 120 to light emitted from pixel cells of other colors in the display panel.
The display panel includes a first substrate and a second substrate, and the photo spacer is disposed between the first substrate and the second substrate and between pixel units on the first substrate. When the display panel displays, red light irradiates on the light spacer, and a part of the red light can be absorbed by the adjusting particles in the light spacer, so that the problem of color cast at the left side and the right side of the display panel can be improved at least to a certain extent.
Specifically, in the present disclosure, by controlling the concentration of the adjusting particles 120 in the light spacer or changing the particle size of the adjusting particles 120, the absorption intensity of the adjusting particles 120 to red light can be controlled, which is essential to relatively weaken the light emitting intensity of red-side red-light pixels, adjust the monochrome ratio of white pictures at large viewing angles, and make the monochrome ratio of white light at the left and right sides more balanced, thereby improving the red-emitting phenomenon at one side of the display panel.
In the technical scheme provided by the disclosure, the structure of the pixel unit is not required to be improved, and only the optical spacers are required to be arranged, so that the problem of color cast of the left side and the right side of the display panel under a large viewing angle can be at least improved and even eliminated, and the total cost for manufacturing the display panel is reduced.
In the present disclosure, the specific size of the conditioning particles 120 is not particularly limited. As an alternative embodiment, the size of the conditioning particles 120 may be on the nanometer scale, i.e., the conditioning particles 120 are nanoparticles. The nano-particles have small size effect, the optical performance is excellent, the light absorption characteristic of the nano-particles is related to the size of the nano-particles, and the nano-particles can absorb red light by adjusting the size of the nano-particles.
In the present disclosure, the specific size of the conditioning particles 120 is not particularly limited. For example, the adjustment particles 120 may be spherical nanoparticles, rod-shaped nanoparticles, or the like. In the present disclosure, the size and shape of the conditioning particles 120 may be set according to the specific need for color shift improvement.
In the present disclosure, specific materials of the regulatory particles are not particularly limited, and for example, materials of which the regulatory particles are made include chlorophyll a. The molecular formula of chlorophyll a is C55H72O5N4Mg, in particular, chlorophyll a has the molecular formula:
for an organic light emitting diode display panel, the blue pixel unit emits blue light with a wavelength of about 460nm, and the red pixel unit emits red light with a wavelength of about 630 nm.
The relative absorption intensities of chlorophyll a for different wavelengths of light are shown in fig. 2. As can be seen from this fig. 2, the leaf green a absorbs little filtering, and the relative absorption intensity for blue light having a wavelength of 460nm (about 0.03) is lower than that for red light having a wavelength of 630nm (close to 0.1). After the adjustment particles 120 made of chlorophyll are disposed in the photo spacer, the adjustment particles 120 are disposed between the red pixel unit and the blue pixel unit, and in the embodiment shown in fig. 5 and 6, the red pixel unit R is located at the right side of the blue pixel unit B. When the organic light-emitting diode display panel emits light, the absorption of the red light on the right side by the light spacer is larger than that of the blue light on the left side, the relative luminous intensity of the red light on the right side is weakened, and the phenomenon that the display panel emits red and powder is obviously improved or even completely eliminated when the display panel is observed from the right side.
Chlorophyll a exists in all green plants, the source is wide, the raw materials are easy to obtain, and therefore, the cost for manufacturing the photospacers can be reduced by using the chlorophyll a to prepare the adjusting particles 120.
Of course, the present disclosure is not limited to making conditioning particles 120 from chlorophyll a, and as an alternative embodiment, conditioning particles 120 may also include metal nanoparticles.
Further, the metal nanoparticles may include gold nanoparticles having a diameter satisfying the following formula (1):
λred＝514.049+0.3778d(nm) (1)；
wherein λ isredIs the wavelength of red light;
d is the diameter of the gold nanoparticles.
In addition, other small organic molecules may be used to form conditioning particles 120. As an alternative embodiment, the conditioning particles are made of a material selected from at least one of the materials having the following molecular formula:
fig. 3 shows an absorption spectrum (fig. 3(a)) and an emission spectrum (fig. 3 (b)) of a film made of a material having a molecular formula of molecule 1, a film made of a material having a molecular formula of molecule 2, and a film made of a material having a molecular formula of molecule 3, and it can be seen from fig. 3(a) that the films made of these three materials have a high absorbance for red light and a low absorbance for blue and green light. Especially, the material with molecular formula of 1 has the maximum absorption just in the range of 623nm of monochromatic red light wavelength of the organic light emitting diode display panel and almost no absorption in green light and blue light bands.
Shown in fig. 4 are the absorption and emission spectra of the films made of PtTPTBP and of PtNTBP. Wherein the curve composed of triangles represents PtTPTBP and the curve composed of squares represents PtNTBP. As can be seen from fig. 5, the thin film made of the two materials has no absorption or low absorptivity in blue light and green light bands, and has high absorptivity in 600nm-630nm (red light band).
In the present disclosure, the material of the spacer body 110 is not particularly limited, and as an alternative embodiment, the material of the spacer body 110 is polyurethane.
In the present disclosure, the content of the conditioning particles 120 in the photo spacer is not particularly limited, and the content of the conditioning particles 120 in the photo spacer may be determined according to specific products and display requirements. Optionally, the conditioning particles are 5% to 10% by mass in the photo spacer.
As a second aspect of the present disclosure, there is provided a display panel including a first substrate, a second substrate, the first substrate and the second substrate being disposed opposite to each other, a plurality of pixel units being disposed on the first substrate, the plurality of pixel units including a red pixel unit, wherein, as shown in fig. 5 and 6, the display panel further includes a plurality of optical spacers 100, the optical spacers 100 being the above optical spacers provided in the present disclosure, the optical spacers 100 being disposed between the first substrate and the second substrate, and the optical spacers 100 being disposed between the first substrate and the second substrate and located at positions between the pixel units.
As described above, when the red light is irradiated on the light spacer after the display of the display panel, a part of the red light can be absorbed by the adjusting particles in the light spacer, so that the problem of color shift on the left and right sides of the display panel can be improved at least to some extent.
To better absorb the laterally emitted red light, a light spacer 100 is optionally disposed adjacent to the red pixel cell R.
In the present disclosure, the plurality of pixel cells further includes a blue pixel cell B and a green pixel cell G, and the light spacer 100 may be disposed between the blue pixel cell B and the red pixel cell R. Of course, the light spacer 100 may also be disposed between the red pixel cell R and the green pixel cell B.
In the present disclosure, the specific structure of the display panel is not particularly limited. As an alternative embodiment, the display panel may be an organic light emitting diode display panel.
In the present disclosure, the arrangement of each pixel unit in the display panel is not particularly limited. In the embodiments shown in fig. 5 and 6, the pixel units of the display panel are arranged in three columns in one period.
In the same arrangement period, a column of blue pixel units, a column of red pixel units and a column of green pixel units are arranged in sequence. As can be seen in the figure, the area of the red pixel unit and the area of the blue pixel unit are both larger than the area of the green pixel unit. Further, the area of the red pixel unit is smaller than that of the blue pixel unit. However, the number of green pixel cells is greater than the number of red pixel cells.
Examples
The pixel units of the organic light-emitting diode display panel comprise a red pixel unit, a green pixel unit, a blue pixel unit and a white pixel unit. The light spacer is disposed around the red pixel cell.
Comparative example
The pixel units of the organic light-emitting diode display panel comprise a red pixel unit, a green pixel unit, a blue pixel unit and a white pixel unit. The light spacers are not arranged around the red pixel units.
Test example
The L-decay curve and the white light CIE locus were measured for the display panel of the example and the display panel of the comparative example, respectively.
As can be seen from fig. 7(a), the luminance attenuation of the display panel provided in the comparative example is significantly asymmetric on the left and right sides of the red light, and the red light attenuation on the right side is significantly slower, which results in that the side is significantly luminous at the viewing angle, as can be clearly seen from the CIE locus of the white light in fig. 7 (b).
As can be seen from fig. 7(a), the luminance attenuation of the red light on the right side of the display panel provided in the embodiment is accelerated, and the symmetry of the luminance attenuation on the left and right sides of the red light is obviously improved. As can be seen from fig. 7(b), the CIE locus for the red side is shifted significantly toward the greenish side (greenish to the left of the x-axis, red pink to the right). The problem that a certain side of an OLED screen emits red hair powder can be effectively solved by modifying and filling the light spacer
It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present disclosure, and that the present disclosure is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and such changes and modifications are to be considered within the scope of the disclosure.
Claims (10)
1. An optical spacer for a display panel, the optical spacer comprising a spacer body and a plurality of adjusting particles dispersed in the spacer body, wherein an absorption rate of the adjusting particles for red light is greater than an absorption rate of the adjusting particles for light emitted from pixel cells of other colors in the display panel.
2. The photospacer of claim 1, wherein the conditioning particles are nanoscale in size.
3. The optical spacer of claim 1, wherein the material of which the conditioning particles are made comprises chlorophyll a.
4. The optical spacer of claim 1 wherein the conditioning particles comprise metal nanoparticles.
5. The photospacer of claim 4, wherein the metal nanoparticles comprise gold nanoparticles having a diameter satisfying the following formula:
λred＝514.049+0.3778d(nm)；
wherein λ isredIs the wavelength of red light;
d is the diameter of the gold nanoparticles.
6. The optical spacer of claim 1, wherein the material from which the conditioning particles are made is selected from at least one of the following materials:
7. the optical spacer according to any one of claims 1 to 6, wherein the conditioning particles are present in the optical spacer in an amount of 5 to 10% by mass.
8. A display panel comprising a first substrate, a second substrate, the first substrate and the second substrate being disposed opposite to each other, the first substrate having a plurality of pixel units disposed thereon, the plurality of pixel units including a red pixel unit, wherein the display panel further comprises a plurality of optical spacers, the optical spacers being as claimed in any one of claims 1 to 7, the optical spacers being disposed between the first substrate and the second substrate and at positions between the pixel units.
9. The display panel of claim 8, wherein the light spacer is disposed adjacent to the red pixel cell.
10. The display panel of claim 9, wherein the plurality of pixel cells further comprises a blue pixel cell and a green pixel cell, the optical spacer being disposed between the blue pixel cell and the red pixel cell; or the optical spacer is disposed between the red pixel cell and the green pixel cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010130393.3A CN111653681A (en) | 2020-02-28 | 2020-02-28 | Optical spacer and display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010130393.3A CN111653681A (en) | 2020-02-28 | 2020-02-28 | Optical spacer and display panel |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277509A (en) * | 2019-06-24 | 2019-09-24 | 昆山国显光电有限公司 | A kind of display panel and display device |
| CN110299391A (en) * | 2019-06-27 | 2019-10-01 | 昆山国显光电有限公司 | A kind of display panel and display device |
| WO2019186844A1 (en) * | 2018-03-28 | 2019-10-03 | シャープ株式会社 | Light-emitting device, light wavelength conversion device, and display device |
| CN110473900A (en) * | 2019-08-27 | 2019-11-19 | 昆山工研院新型平板显示技术中心有限公司 | Display panel and display device |
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2020
- 2020-02-28 CN CN202010130393.3A patent/CN111653681A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019186844A1 (en) * | 2018-03-28 | 2019-10-03 | シャープ株式会社 | Light-emitting device, light wavelength conversion device, and display device |
| CN110277509A (en) * | 2019-06-24 | 2019-09-24 | 昆山国显光电有限公司 | A kind of display panel and display device |
| CN110299391A (en) * | 2019-06-27 | 2019-10-01 | 昆山国显光电有限公司 | A kind of display panel and display device |
| CN110473900A (en) * | 2019-08-27 | 2019-11-19 | 昆山工研院新型平板显示技术中心有限公司 | Display panel and display device |
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