CN110767716A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN110767716A
CN110767716A CN201910363138.0A CN201910363138A CN110767716A CN 110767716 A CN110767716 A CN 110767716A CN 201910363138 A CN201910363138 A CN 201910363138A CN 110767716 A CN110767716 A CN 110767716A
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pixel
oled
color
oled sub
light
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CN110767716B (en
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刘如胜
谢峰
黄智明
王光辉
范俊
秦旭
常苗
张露
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Kunshan Guoxian Photoelectric Co Ltd
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Kunshan Guoxian Photoelectric Co Ltd
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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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • 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
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses

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  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The invention relates to a display panel and a display device. The display panel includes: a transparent display area and a non-transparent display area; the non-transparent display area comprises first OLED pixels arranged in an array manner; the first OLED pixel comprises a first OLED sub-pixel of at least one color; the transparent display area comprises second OLED pixels which are arranged in an array manner; the second OLED pixel comprises a second OLED sub-pixel of at least one color; and an auxiliary film layer is arranged on any side of at least part of the second OLED sub-pixels and is used for improving the light-emitting spectral color purity of the second OLED sub-pixels so as to enable the light-emitting spectra of the second OLED sub-pixels with the same color to be basically consistent with that of the first OLED sub-pixels. According to the embodiment of the invention, the light emission spectra of the transparent display area and the non-transparent display area are basically consistent, the display effect of the display panel is more uniform, and the display effect of the display panel is improved.

Description

Display panel and display device
Technical Field
The invention relates to the technical field of OLED display equipment, in particular to a display panel and a display device.
Background
With the rapid development of display devices, the requirements of users on screen occupation are higher and higher. Since the top of the screen needs to be provided with elements such as a camera, a sensor, an earphone, etc., in the related art, a part of area is usually reserved at the top of the screen for installing the elements, for example, the "bang" area of iphoneX of the iphone, which affects the overall consistency of the screen. Currently, full-screen displays are receiving more and more attention from the industry.
Disclosure of Invention
The invention provides a display panel and a display device to solve the defects in the related art.
According to a first aspect of embodiments of the present invention, there is provided a display panel including: a transparent display area and a non-transparent display area; the non-transparent display area comprises first OLED pixels arranged in an array manner; the first OLED pixel comprises a first OLED sub-pixel of at least one color;
the transparent display area comprises second OLED pixels which are arranged in an array manner; the second OLED pixel comprises a second OLED sub-pixel of at least one color; and an auxiliary film layer is arranged on any side of at least part of the second OLED sub-pixels and is used for improving the light-emitting spectral color purity of the second OLED sub-pixels so as to enable the light-emitting spectra of the second OLED sub-pixels with the same color to be basically consistent with the light-emitting spectra of the first OLED sub-pixels.
In one embodiment, the auxiliary film layer may be a filter; the optical filter is positioned above the second OLED sub-pixel; the color of the optical filter above the second OLED sub-pixel with different colors is different, and the color of the optical filter is the same as the color of light emitted by the second OLED sub-pixel below the optical filter.
The color of the optical filter above the second OLED sub-pixel is the same as the color of the light emitted by the second OLED sub-pixel, so that the optical filter above the second OLED sub-pixel only allows the light with the same color as the light emitted by the second OLED sub-pixel to pass through, and the light with other colors is prevented from passing through, therefore, the spectrum of the light emitted by the second OLED sub-pixel can be corrected, and the spectral color purity of the light emitted by the second OLED sub-pixel is improved.
In one embodiment, the display panel further comprises an encapsulation layer;
the packaging layer covers the second OLED sub-pixels, and the optical filter is located above the packaging layer.
The optical filter is positioned above the packaging layer, namely the optical filter is positioned outside the second OLED pixel, so that the preparation process can be simplified, and the feasibility is high.
In one embodiment, the auxiliary film layer may be a band-pass filter film train; the band-pass filtering film is positioned above the second OLED pixel; the band-pass filter film is used for allowing the light emitted by the second OLED sub-pixel of at least one color to pass through and forbidding the light of other colors to pass through.
The band-pass filter film above the second OLED pixel allows light emitted by the second OLED sub-pixel with at least one color in the second OLED pixel to transmit, and prohibits light with other colors from transmitting, so that the light spectrum emitted by the second OLED sub-pixel with at least one color in the second OLED pixel can be corrected, and the light spectrum and color purity of the second OLED pixel can be improved.
Preferably, the display panel further comprises an encapsulation layer;
the packaging layer covers the second OLED pixels, and the band-pass filtering film is located above the packaging layer.
The band-pass filtering film is positioned above the packaging layer, namely the band-pass filtering film is positioned outside the second OLED pixel, so that the preparation process can be simplified, and the feasibility is high.
Preferably, the band-pass filter film system includes a silicon oxide film, a silicon nitride film, a magnesium film and a lithium fluoride film.
The band-pass filtering film system comprises films prepared from various refractive index materials such as a silicon oxide film, a silicon nitride film, a magnesium film, a lithium fluoride film and the like, so that the thickness of the band-pass filtering film system can be reduced, and the thickness of the display panel is prevented from being obviously thickened.
In one embodiment, the auxiliary film layer may be a planarization layer, the planarization layer being located under the second OLED sub-pixel; the color of the planarization layer under the second OLED sub-pixel of different color is different, and the color of the planarization layer is the same as the color of the light emitted by the second OLED sub-pixel above the planarization layer.
Because the color of the planarization layer below the second OLED sub-pixel is the same as the color of the light emitted by the second OLED sub-pixel, the planarization layer only allows the light with the same color as the light emitted by the second OLED sub-pixel to transmit, and prohibits the light with other colors from transmitting, therefore, noise waves in the light emitted from the interior of the display panel to the second OLED sub-pixel can be filtered, and the spectral color purity of the light emitted by the second OLED sub-pixel is improved.
In one embodiment, the auxiliary film layer is a transparent pixel definition layer; each second OLED sub-pixel comprises an anode, a light-emitting layer positioned on the anode and a cathode positioned on the light-emitting layer; the transparent pixel defining layers are positioned on two sides of the light emitting layer; the transparent pixel definition layers on two sides of the light emitting layer of the second OLED sub-pixel with different colors are different in color; the color of the transparent pixel definition layer on two sides of the light emitting layer of the second OLED sub-pixel is the same as the color of the light emitting of the second OLED sub-pixel.
The color of the transparent pixel defining layers on the two sides of the light emitting layer of the second OLED sub-pixel is the same as the color of the light emitted by the second OLED sub-pixel, so that the light with the same color as the light emitted by the second OLED sub-pixel can be allowed to transmit, and the light with other colors can be forbidden to transmit, therefore, the light emitting intensity of the second OLED sub-pixel can be enhanced, and the spectral color purity of the light emitted by the second OLED sub-pixel is improved.
In one embodiment, the auxiliary film layer may be a refractive index adjustable layer located under the second OLED sub-pixel; the refractive index adjustable layer is used to destructively interfere light emitted downward by the second OLED subpixel with light reflected toward the second OLED subpixel.
Because the refractive index adjustable layer below the second OLED sub-pixel can make the light emitted downwards by the second OLED sub-pixel and the light reflected towards the second OLED sub-pixel generate the interference cancellation, the stray light of other colors except the color emitted by the second OLED sub-pixel can be inhibited, and the spectral color purity of the light emitted by the second OLED sub-pixel is further improved.
According to a second aspect of embodiments of the present invention, there is provided a display device including:
an apparatus body having a device region;
the display panel described above;
the display panel covers the equipment body;
the device region is positioned below the transparent display region and comprises a photosensitive device which transmits or collects light rays through the transparent display region;
preferably, the photosensitive device comprises at least one of: the device comprises a camera, a light sensor and a light emitter;
preferably, at least part of the transparent display area is surrounded by a non-transparent display area.
In one embodiment, the auxiliary film layer is a refractive index adjustable layer; the display device further comprises a control module, wherein the control module is used for receiving the spectrum information of the light emitted by each second OLED sub-pixel of the transparent display area collected by the photosensitive device and adjusting the refractive index of the refractive index adjustable layer according to the spectrum information, so that the light emitted downwards by the second OLED sub-pixels is destructively interfered with the light reflected towards the second OLED sub-pixels.
The light-emitting spectral information of each second OLED sub-pixel in the transparent display area can be collected through the photosensitive device, and the refractive index of the refractive index adjustable layer is adjusted according to the spectral information, so that the light emitted downwards by the second OLED sub-pixel is subjected to coherent cancellation with the light reflected towards the second OLED sub-pixel, and therefore the light-emitting spectral color purity of the second OLED sub-pixel can be improved in real time.
According to the embodiments, the display panel includes a transparent display area and a non-transparent display area, the non-transparent display area includes first OLED pixels arranged in an array, the first OLED pixels include first OLED sub-pixels of at least one color, the transparent display area includes second OLED pixels arranged in an array, and the second OLED pixels include second OLED sub-pixels of at least one color. The auxiliary film layer is arranged on any side of at least part of the second OLED sub-pixels and is used for improving the light-emitting spectral color purity of the second OLED sub-pixels so that the light-emitting spectrums of the second OLED sub-pixels and the first OLED sub-pixels with the same color are basically consistent, therefore, the light-emitting spectrums of the transparent display area and the non-transparent display area are basically consistent, the display effect of the display panel is more uniform, and the display effect of the display panel is improved.
According to a third aspect of the embodiments of the present invention, there is provided a display device, including a display panel and a color shift adjustment module;
the display panel includes: a transparent display area and a non-transparent display area; the non-transparent display area comprises first OLED pixels arranged in an array manner; the first OLED pixel comprises a first OLED sub-pixel of at least one color; the transparent display area comprises second OLED pixels which are arranged in an array manner; the second OLED pixel comprises a second OLED sub-pixel of at least one color; the light-emitting wave band of a first OLED sub-pixel of the same color is a first wave band, the light-emitting wave band of a second OLED sub-pixel is a second wave band, a first peak value exists in the first wave band, the first peak value and a second peak value exist in the second wave band, and the intensity of the second peak value is the same as that of the first peak value;
the color cast adjusting module is used for acquiring a first wave band and a first peak value of light emission of a first OLED sub-pixel, acquiring two peak values of a second wave band of light emission of a second OLED sub-pixel, distinguishing the first peak value and the second peak value from the two peak values of the second wave band according to the wavelength of the first peak value, and carrying out gamma adjustment on the transparent display area to eliminate color cast caused by the second peak value, so that the light emission spectra of the second OLED sub-pixel and the first OLED sub-pixel with the same color are basically consistent.
According to the embodiments, the display panel includes a transparent display area and a non-transparent display area, the non-transparent display area includes first OLED pixels arranged in an array, the first OLED pixels include first OLED sub-pixels of at least one color, the transparent display area includes second OLED pixels arranged in an array, and the second OLED pixels include second OLED sub-pixels of at least one color. For a first OLED sub-pixel and a second OLED sub-pixel of the same color, the light-emitting waveband of the first OLED sub-pixel is a first waveband, the light-emitting waveband of the second OLED sub-pixel is a second waveband, a first peak exists in the first waveband, a first peak and a second peak exist in the second waveband, and the intensity of the second peak is the same as that of the first peak. The color cast adjusting module can be used for acquiring a first wave band and a first peak value of light emission of the first sub-OLED pixel, acquiring two peak values of a second wave band of light emission of the second OLED sub-pixel, distinguishing the first peak value and the second peak value from the two peak values of the second wave band according to the wavelength of the first peak value, and performing gamma adjustment on the transparent display area to eliminate color cast caused by the second peak value, so that the light emission spectrums of the second OLED sub-pixel and the first OLED sub-pixel of the same color are basically consistent, therefore, the light emission spectrums of the transparent display area and the non-transparent display area are basically consistent, the display effect of the display panel is more uniform, and the display effect of the display panel is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram of a spectrum of light emission of a display panel in the related art;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram illustrating another display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram illustrating another display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram illustrating another display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
In the related art, there is a display panel including a non-transparent display region and a transparent display region, and the transparent display region can implement both a light transmission function and a display function. Wherein, photosensitive elements such as a camera, a distance sensor and the like are arranged below the transparent display area. Due to the fact that the structure of the pixels in the transparent display area is different from that of the pixels in the non-transparent display area, the light emission spectrum of the pixels in the transparent display area is different from that of the pixels in the non-transparent display area, and the display effect of the display panel is affected.
The spectrum diagram of the light emitted by the display panel can be seen in fig. 1. The horizontal axis is wavelength, the unit is nanometer, the vertical axis is normalized light intensity, curves 11, 12 and 13 are spectral characteristic curves of light emission of the red sub-pixel, the green sub-pixel and the blue sub-pixel in the non-transparent display area respectively, and curves 14, 15 and 16 are spectral characteristic curves of light emission of the red sub-pixel, the green sub-pixel and the blue sub-pixel in the transparent display area respectively. In contrast, the spectral characteristic curves of the light emitted by the red, green, and blue sub-pixels in the transparent display area have secondary peaks, that is, noise exists in the light emitted by the red, green, and blue sub-pixels in the transparent display area.
In view of the above technical problems, embodiments of the present invention provide a display panel and a display device, which can make the light emission spectra of the transparent display area and the non-transparent display area substantially consistent, make the display effect of the display panel more uniform, and improve the display effect of the display panel.
Fig. 2 is a diagram illustrating a display panel according to an embodiment of the present invention. As shown in fig. 2, the display panel 2 includes: a non-transparent display area 21 and a transparent display 22.
The non-transparent display area 21 includes first OLED pixels (not shown) arranged in an array, and the first OLED pixels include first OLED sub-pixels (not shown) of at least one color. The transparent display region 22 includes second OLED pixels (not shown) arranged in an array, and the second OLED pixels include second OLED sub-pixels (not shown) of at least one color. And an auxiliary film layer is arranged on any side of at least part of the second OLED sub-pixels and is used for improving the light-emitting spectral color purity of the second OLED sub-pixels so as to enable the light-emitting spectra of the second OLED sub-pixels with the same color to be basically consistent with that of the first OLED sub-pixels. For example, an auxiliary film layer may be disposed on either side of each second OLED subpixel, or may be disposed on either side of a portion of the second OLED subpixels.
In an embodiment, the auxiliary film layer is disposed on any side of at least a part of the second OLED sub-pixels, and is used for improving the spectral color purity of the light emitted by the second OLED sub-pixels, so that the light emitted by the second OLED sub-pixels and the light emitted by the first OLED sub-pixels of the same color are substantially consistent, and therefore, the light emitting spectrum of the transparent display area and the light emitting spectrum of the non-transparent display area are substantially consistent, the display effect of the display panel is more uniform, and the display effect of the display panel is improved.
In one exemplary embodiment, the first OLED pixel may include first OLED subpixels of three colors of red, green, and blue, and the second OLED pixel may include second OLED subpixels of three colors of red, green, and blue, but is not limited thereto. The first OLED pixel includes a first OLED sub-pixel of three colors of red, green, and blue, and the second OLED pixel may include a second OLED sub-pixel of three colors of red, green, and blue.
The embodiment of the invention also provides a display panel. In this embodiment, based on the embodiment shown in fig. 2, the auxiliary film layer is a filter. The optical filter is positioned above the second OLED sub-pixel. The color of the optical filter above the second OLED sub-pixel with different colors is different, and the color of the optical filter is the same as the color of light emitted by the second OLED sub-pixel below the optical filter.
As shown in fig. 3, the second OLED pixel 31 may include a red second OLED subpixel 311, a green second OLED subpixel 312, and a blue second OLED subpixel 313. Wherein the second OLED pixel 31 is located on the driving circuit layer 32, and a transparent pixel defining layer 33 is disposed between the second OLED sub-pixels of different colors. The following description will take an example in which a filter is disposed above each second OLED sub-pixel.
As shown in fig. 3, a red color filter 34 is disposed above the red second OLED subpixel 311, a green color filter 35 is disposed above the green second OLED subpixel 312, and a blue color filter 36 is disposed above the blue second OLED subpixel 313. The red filter 34 may allow only the red light emitted from the red second OLED subpixel 311 to pass therethrough and prevent the other colors of light from passing therethrough, the green filter 35 may allow only the green light emitted from the green second OLED subpixel 312 to pass therethrough and prevent the other colors of light from passing therethrough, and the blue filter 36 may allow only the blue light emitted from the blue second OLED subpixel 313 to pass therethrough and prevent the other colors of light from passing therethrough. Thus, the red filter 34 can correct the emission spectrum of the red second OLED subpixel 311, the green filter 35 can correct the emission spectrum of the green second OLED subpixel 312, and the blue filter 36 can correct the emission spectrum of the blue second OLED subpixel 313.
In one embodiment, as shown in FIG. 3, the display panel 2 may further include an encapsulation layer 37. The encapsulation layer 37 covers the second OLED sub-pixels 311, 312, 313, and the filters 34, 35, 36 are located above the encapsulation layer 37. Since the optical filter is located above the encapsulation layer, that is, the optical filter is located outside the second OLED pixel 31, the manufacturing process can be simplified, and the feasibility is high.
In one embodiment, the method of manufacturing the optical filter may be as follows: after the packaging process is completed, the optical filters 34, 35, and 36 may be prepared by using a photolithography process. For example, a red filter 34, a green filter 35, and a blue filter 36 may be prepared. Of course, the preparation sequence of the filters of three colors can be exchanged, and is not limited to the preparation sequence provided in the embodiment of the present invention.
In this embodiment, since the color of the filter above the second OLED sub-pixel is the same as the color of the light emitted by the second OLED sub-pixel, the filter above the second OLED sub-pixel only allows the light with the same color as the light emitted by the second OLED sub-pixel to pass through, and prohibits the light with other colors from passing through, so that the spectrum of the light emitted by the second OLED sub-pixel can be corrected, and the spectral color purity of the light emitted by the second OLED sub-pixel can be improved.
The embodiment of the invention also provides a display panel. In this embodiment, based on the embodiment shown in fig. 2, the auxiliary film layer is a band-pass filter film system. The band-pass filtering film is positioned above the second OLED pixel; the band-pass filter film is used for allowing the light emitted by the second OLED sub-pixel of at least one color to pass through and forbidding the light of other colors to pass through.
As shown in fig. 4, the second OLED pixel 31 may include a red second OLED subpixel 311, a green second OLED subpixel 312, and a blue second OLED subpixel 313. The following description will take the example of a band-pass filter film disposed above each second OLED pixel 31.
As shown in fig. 4, the band-pass filtering film system 41 may cover all the second OLED pixels 31 in the transparent display region 22. The band-pass filter film system 41 can allow the light emitted by the red second OLED sub-pixel 311, the green second OLED sub-pixel 312, and the blue second OLED sub-pixel 313 to pass through, and can prevent the light of other colors from passing through. For example, the red second OLED subpixel 311 can emit light in the wavelength band of 620-720 nm, the green second OLED subpixel 312 can emit light in the wavelength band of 500-600 nm, and the blue second OLED subpixel 313 can emit light in the wavelength band of 450-490 nm. The band-pass filter 41 allows light with wavelengths of 620-720 nm, 500-600 nm and 450-490 nm to pass through, and prohibits light with other wavelengths from passing through. Therefore, the light spectrum of the second OLED sub-pixel of each color in the second OLED pixel can be corrected, and the light spectrum and color purity of the second OLED pixel can be improved. Of course, the band-pass filtering film system 41 may be a complete film layer, and may include several discrete film layers, which is not limited in the embodiment of the present invention.
In one embodiment, the band pass filter film system 41 may include a silicon oxide film, a silicon nitride film, a magnesium film, and a lithium fluoride film. The band-pass filtering film system comprises films prepared from various refractive index materials such as a silicon oxide film, a silicon nitride film, a magnesium film, a lithium fluoride film and the like, so that the thickness of the band-pass filtering film system can be reduced, and the thickness of the display panel is prevented from being obviously thickened. Of course, the material of the band-pass filter film system 41 may not be limited to the material listed in the embodiment of the present invention.
In one embodiment, as shown in FIG. 4, the display panel 2 may further include an encapsulation layer 37. The encapsulation layer 37 covers the second OLED pixel 31, and the band-pass filter film system 41 is located above the encapsulation layer 37. The band-pass filtering film is positioned above the packaging layer, namely the band-pass filtering film is positioned outside the second OLED pixel, so that the preparation process can be simplified, and the feasibility is high.
In this embodiment, the bandpass filter film above the second OLED pixel allows light emitted by the second OLED sub-pixel of at least one color in the second OLED pixel to pass through, and prohibits light of other colors from passing through, so that the spectrum of light emitted by the second OLED sub-pixel of at least one color in the second OLED pixel can be corrected, and the spectral color purity of light emitted by the second OLED pixel can be further improved.
The embodiment of the invention also provides a display panel. In this embodiment, based on the embodiment shown in fig. 2, the auxiliary film layer is a planarization layer, and the planarization layer is located below the second OLED sub-pixel; the color of the planarization layer under the second OLED sub-pixel of different color is different, and the color of the planarization layer is the same as the color of the light emitted by the second OLED sub-pixel above the planarization layer.
In this embodiment, the color of the planarization layer under each second OLED subpixel is the same as the color of light emitted by the second OLED subpixel. As shown in fig. 5, the planarization layer 52 under the anode 51 of the second OLED sub-pixel is a colored planarization layer, and the planarization layer 53 not under the anode 51 of the second OLED sub-pixel is an uncolored planarization layer. The color of the planarization layer 52 is the same as the color of light emitted by the second OLED subpixel located above the planarization layer 52.
For example, the color of the planarization layer 52 under the anode of the red second OLED sub-pixel is the same as the color of the light emitted by the red second OLED sub-pixel, the color of the planarization layer 52 under the anode of the green second OLED sub-pixel is the same as the color of the light emitted by the green second OLED sub-pixel, and the color of the planarization layer 52 under the anode of the blue second OLED sub-pixel is the same as the color of the light emitted by the blue second OLED sub-pixel. In this way, the planarization layer under the anode of the red second OLED subpixel may allow only the light of the same color as the light emitted by the red second OLED subpixel to pass through and prohibit the light of other colors, the planarization layer under the anode of the green second OLED subpixel may allow only the light of the same color as the light emitted by the green second OLED subpixel to pass through and prohibit the light of other colors, and the planarization layer under the anode of the blue second OLED subpixel may allow only the light of the same color as the light emitted by the blue second OLED subpixel to pass through and prohibit the light of other colors to pass through.
In this embodiment, since the color of the planarization layer under the second OLED sub-pixel is the same as the color of the light emitted by the second OLED sub-pixel, the planarization layer only allows the light with the same color as the light emitted by the second OLED sub-pixel to transmit, and prohibits the light with other colors from transmitting, noise in the light emitted from the inside of the display panel to the second OLED sub-pixel can be filtered, and the spectral color purity of the light emitted by the second OLED sub-pixel is improved.
The embodiment of the invention also provides a display panel. In this embodiment, on the basis of the embodiment shown in fig. 2, the auxiliary film layer is a transparent pixel defining layer, and each of the second OLED sub-pixels includes an anode, a light emitting layer on the anode, and a cathode on the light emitting layer. The transparent pixel defining layers are positioned on two sides of the light emitting layer, the colors of the transparent pixel defining layers on two sides of the light emitting layer of the second OLED sub-pixel with different colors are different, and the color of the transparent pixel defining layers on two sides of the light emitting layer of the second OLED sub-pixel is the same as the color of the light emitted by the second OLED sub-pixel.
In this embodiment, the second OLED pixel may include a red second OLED sub-pixel, a green second OLED sub-pixel, and a blue second OLED sub-pixel. The color of the transparent pixel definition layers on the two sides of the light emitting layer of the red second OLED sub-pixel is red, the color of the transparent pixel definition layers on the two sides of the light emitting layer of the green second OLED sub-pixel is green, and the color of the transparent pixel definition layers on the two sides of the light emitting layer of the blue second OLED sub-pixel is blue. The red transparent pixel defining layer can allow light with the same color as the light emitted by the red second OLED sub-pixel to pass through and prevent light with other colors from passing through, and can improve the light intensity of the light emitted by the red second OLED sub-pixel, the green transparent pixel defining layer can allow light with the same color as the light emitted by the green second OLED sub-pixel to pass through and prevent light with other colors from passing through, and can improve the light intensity of the light emitted by the green second OLED sub-pixel, and the blue transparent pixel defining layer can allow light with the same color as the light emitted by the blue second OLED sub-pixel to pass through and prevent light with other colors from passing through, and can improve the light intensity of the light emitted by the blue second OLED sub-pixel.
In this embodiment, since the color of the transparent pixel defining layers on both sides of the light emitting layer of the second OLED sub-pixel is the same as the color of the light emitted by the second OLED sub-pixel, the light having the same color as the light emitted by the second OLED sub-pixel can be allowed to transmit, and the light having other colors can be prohibited from transmitting, so that the intensity of the light emitted by the second OLED sub-pixel can be enhanced, thereby improving the spectral color purity of the light emitted by the second OLED sub-pixel.
The embodiment of the invention also provides a display panel. In this embodiment, based on the embodiment shown in fig. 2, the auxiliary film layer is a refractive index adjustable layer, and the refractive index adjustable layer is located below the second OLED sub-pixel; the refractive index adjustable layer is used to destructively interfere light emitted downward by the second OLED subpixel with light reflected toward the second OLED subpixel.
In this embodiment, a refractive index adjustable layer is disposed under each second OLED sub-pixel. As shown in fig. 6, a refractive index adjustable layer 61 is provided under the anode 51 of the second OLED sub-pixel. The refractive index adjustable layer 61 is in the same layer as the uncolored planarizing layer 53. For example, the refractive index adjustable layer under the red second OLED subpixel can cause the light emitted downward from the red second OLED subpixel to destructively interfere with the light reflected toward the red second OLED subpixel, thereby eliminating stray light emitted toward the red second OLED subpixel from the interior of the display panel. The refractive index adjustable layer below the green second OLED sub-pixel can enable the light emitted downwards by the green second OLED sub-pixel to be subjected to interference cancellation with the light reflected by the green second OLED sub-pixel, and accordingly stray light emitted to the green second OLED sub-pixel inside the display panel is eliminated.
In this embodiment, the light emitted downward by the second OLED sub-pixel and the light reflected toward the second OLED sub-pixel are destructively cancelled by the refractive index adjustable layer below the second OLED sub-pixel, so that stray light of other colors except the color emitted by the second OLED sub-pixel can be suppressed, and the spectral color purity of the light emitted by the second OLED sub-pixel is further improved.
In this embodiment, the refractive index adjustable layer may include a first plate, a refractive material layer, and a second plate. The refractive material layer is located between the first polar plate and the second polar plate. The first polar plate and the second polar plate are both connected with the power supply. The output voltage of the power supply is adjusted, the voltage between the first polar plate and the second polar plate in the refractive index adjustable layer can be adjusted, and then the refractive index of the refractive material layer is adjusted, so that the light emitted downwards by the second OLED sub-pixel and the light reflected towards the second OLED sub-pixel are subjected to interference cancellation.
The embodiment of the invention also provides a display device. The display device includes: the device body and the display panel in any of the above embodiments.
Wherein the device body has a device region. The display panel covers the device body. The device area is located below the transparent display area and comprises a photosensitive device which transmits or collects light through the transparent display area.
Preferably, the photosensitive device comprises at least one of: camera, light sensor, light emitter.
Preferably, at least part of the transparent display area is surrounded by the non-transparent display area.
In the embodiment of the invention, the auxiliary film layer is arranged on any side of at least part of the second OLED sub-pixels and is used for improving the light-emitting spectral color purity of the second OLED sub-pixels so as to enable the light-emitting spectrums of the second OLED sub-pixels and the first OLED sub-pixels with the same color to be basically consistent, therefore, the light-emitting spectrums of the transparent display area and the non-transparent display area can be basically consistent, the display effect of the display panel is more uniform, and the display effect of the display panel is improved.
The embodiment of the invention also provides a display device. In the present embodiment, the auxiliary film layer is a refractive index adjustable layer; the display device further comprises a control module, wherein the control module is used for receiving the spectrum information of the light emitted by each second OLED sub-pixel of the transparent display area collected by the photosensitive device and adjusting the refractive index of the refractive index adjustable layer according to the spectrum information, so that the light emitted downwards by the second OLED sub-pixels is destructively interfered with the light reflected towards the second OLED sub-pixels.
The embodiment of the invention also provides a display device. The display device comprises a display panel and a color cast adjusting module. As shown in fig. 2, the display panel 2 includes: the transparent display area 22 and the non-transparent display area 21. The non-transparent display area 21 includes first OLED pixels arranged in an array, and the first OLED pixels include first OLED sub-pixels of at least one color. The transparent display area 22 includes second OLED pixels arranged in an array, and the second OLED pixels include second OLED sub-pixels of at least one color. The light-emitting wave band of the first OLED sub-pixel of the same color is a first wave band, the light-emitting wave band of the second OLED sub-pixel is a second wave band, a first peak value exists in the first wave band, a first peak value and a second peak value exist in the second wave band, and the intensity of the second peak value is the same as that of the first peak value.
The color cast adjusting module is used for acquiring a first wave band and a first peak value of light emission of the first OLED sub-pixel, acquiring two peak values of a second wave band of light emission of the second OLED sub-pixel, distinguishing the first peak value and the second peak value from the two peak values of the second wave band according to the wavelength of the first peak value, and performing gamma adjustment on the transparent display area to eliminate color cast caused by the second peak value, so that the light emission spectra of the second OLED sub-pixel with the same color and the first OLED sub-pixel are basically consistent.
In this embodiment, for each color of the first OLED sub-pixel and the second OLED sub-pixel, the color shift adjusting module is configured to obtain a first wavelength band and a first peak of light emitted by the first OLED sub-pixel, obtain two peaks of a second wavelength band of light emitted by the second OLED sub-pixel, distinguish the first peak and the second peak from the two peaks of the second wavelength band according to a wavelength of the first peak, and perform gamma adjustment on the transparent display area to eliminate color shift caused by the second peak, so that the light spectra of the second OLED sub-pixel and the first OLED sub-pixel of the same color are substantially consistent, and therefore, the light emission spectra of the transparent display area and the light emission spectra of the non-transparent display area are substantially consistent, the display effect of the display panel is more uniform, and the display effect of the display panel is improved.
When the display panel is manufactured, the thickness of each second OLED sub-pixel or the thickness of the planarization layer below each second OLED sub-pixel is adjusted so that the intensity of the second peak is the same as the intensity of the first peak, and color shift occurs uniformly in all the second OLED sub-pixels, so as to eliminate color shift through gamma adjustment.
The display device in this embodiment may be: any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator and the like.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.
In the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (10)

1. A display panel, comprising: a transparent display area and a non-transparent display area; the non-transparent display area comprises first OLED pixels arranged in an array manner; the first OLED pixel comprises a first OLED sub-pixel of at least one color;
the transparent display area comprises second OLED pixels which are arranged in an array manner; the second OLED pixel comprises a second OLED sub-pixel of at least one color; and an auxiliary film layer is arranged on any side of at least part of the second OLED sub-pixels and is used for improving the light-emitting spectral color purity of the second OLED sub-pixels so as to enable the light-emitting spectra of the second OLED sub-pixels with the same color to be basically consistent with the light-emitting spectra of the first OLED sub-pixels.
2. The display panel according to claim 1, wherein the auxiliary film layer is a filter; the optical filter is positioned above the second OLED sub-pixel; the color of the optical filter above the second OLED sub-pixel with different colors is different, and the color of the optical filter is the same as the color of light emitted by the second OLED sub-pixel below the optical filter.
3. The display panel according to claim 2, further comprising an encapsulation layer;
the packaging layer covers the second OLED sub-pixels, and the optical filter is located above the packaging layer.
4. The display panel according to claim 1, wherein the auxiliary film layer is a band-pass filter film system; the band-pass filtering film is positioned above the second OLED pixel; the band-pass filter film is used for allowing the light emitted by the second OLED sub-pixel of at least one color to transmit and forbidding the light of other colors to transmit;
preferably, the display panel further comprises an encapsulation layer; the packaging layer covers the second OLED pixels, and the band-pass filtering film is located above the packaging layer;
preferably, the band-pass filter film system includes a silicon oxide film, a silicon nitride film, a magnesium film and a lithium fluoride film.
5. The display panel of claim 1, wherein the auxiliary film layer is a planarization layer, and the planarization layer is located under the second OLED sub-pixel; the color of the planarization layer under the second OLED sub-pixel of different color is different, and the color of the planarization layer is the same as the color of the light emitted by the second OLED sub-pixel above the planarization layer.
6. The display panel according to claim 1, wherein the auxiliary film layer is a transparent pixel defining layer; the second OLED sub-pixel comprises an anode, a light emitting layer positioned on the anode and a cathode positioned on the light emitting layer; the transparent pixel defining layers are positioned on two sides of the light emitting layer; the transparent pixel definition layers on two sides of the light emitting layer of the second OLED sub-pixel with different colors are different in color; the color of the transparent pixel definition layer on two sides of the light emitting layer of the second OLED sub-pixel is the same as the color of the light emitting of the second OLED sub-pixel.
7. The display panel of claim 1, wherein the auxiliary film layer is a refractive index adjustable layer located under the second OLED sub-pixel; the refractive index adjustable layer is used to destructively interfere light emitted downward by the second OLED subpixel with light reflected toward the second OLED subpixel.
8. A display device, comprising:
an apparatus body having a device region;
the display panel of any one of claims 1 to 7;
the display panel covers the equipment body;
the device region is positioned below the transparent display region and comprises a photosensitive device which transmits or collects light rays through the transparent display region;
preferably, the photosensitive device comprises at least one of: the device comprises a camera, a light sensor and a light emitter;
preferably, at least part of the transparent display area is surrounded by a non-transparent display area.
9. The display device according to claim 8, wherein the auxiliary film layer is a refractive index-adjustable layer; the display device further comprises a control module, wherein the control module is used for receiving the spectrum information of the light emitted by each second OLED sub-pixel of the transparent display area collected by the photosensitive device and adjusting the refractive index of the refractive index adjustable layer according to the spectrum information, so that the light emitted downwards by the second OLED sub-pixels is destructively interfered with the light reflected towards the second OLED sub-pixels.
10. A display device is characterized by comprising a display panel and a color cast adjusting module;
the display panel includes: a transparent display area and a non-transparent display area; the non-transparent display area comprises first OLED pixels arranged in an array manner; the first OLED pixel comprises a first OLED sub-pixel of at least one color; the transparent display area comprises second OLED pixels which are arranged in an array manner; the second OLED pixel comprises a second OLED sub-pixel of at least one color; the light-emitting wave band of a first OLED sub-pixel of the same color is a first wave band, the light-emitting wave band of a second OLED sub-pixel is a second wave band, a first peak value exists in the first wave band, the first peak value and a second peak value exist in the second wave band, and the intensity of the second peak value is the same as that of the first peak value;
the color cast adjusting module is used for acquiring a first wave band and a first peak value of light emission of a first OLED sub-pixel, acquiring two peak values of a second wave band of light emission of a second OLED sub-pixel, distinguishing the first peak value and the second peak value from the two peak values of the second wave band according to the wavelength of the first peak value, and carrying out gamma adjustment on the transparent display area to eliminate color cast caused by the second peak value, so that the light emission spectra of the second OLED sub-pixel and the first OLED sub-pixel with the same color are basically consistent.
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