CN114167639B - Display panel, display device and control method of display panel - Google Patents
Display panel, display device and control method of display panel Download PDFInfo
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- CN114167639B CN114167639B CN202010954909.6A CN202010954909A CN114167639B CN 114167639 B CN114167639 B CN 114167639B CN 202010954909 A CN202010954909 A CN 202010954909A CN 114167639 B CN114167639 B CN 114167639B
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission
- H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars
- H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/58—Optical field-shaping elements
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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]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0091—Scattering means in or on the semiconductor body or semiconductor body package
Abstract
The invention discloses a display panel, a display device and a control method of the display panel, wherein the display panel is provided with a plurality of sub-pixels, the display panel comprises a color conversion component, and the color conversion component comprises: the light shielding layer comprises an isolation structure and a plurality of pixel openings formed by enclosing the isolation structure; the sub-pixels are respectively positioned in the pixel isolation openings, and each sub-pixel comprises a dimming unit; the light modulation units of the sub-pixels with different colors have different reflectivities, the sizes of the pixel openings are inversely related to the reflectivities of the light modulation units positioned in the pixel openings, and the sizes of the pixel openings for accommodating the sub-pixels with the same color are the same. The embodiment of the invention can harmonize the reflected light quantity of the dimming units corresponding to the sub-pixels with different colors, reduce the color shift of the display panel and improve the display effect of the display panel.
Description
Technical Field
The invention relates to the field of display, in particular to a display panel, a display device and a control method of the display panel.
Background
Liquid crystal display (Liquid Crystal Display, LCD) panels, organic light emitting diode display (Organic Light Emitting Display, OLED) panels, and flat display panels such as display panels using light emitting diode (Light Emitting Diode, LED) devices have been widely used in various consumer electronic products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, as a result of their advantages such as high image quality, power saving, thin body, and wide application range.
The display panel may implement a display supporting color patterns through various colorization schemes. In some embodiments, colorization is achieved by adding a color conversion layer. However, in the color conversion layer in the prior art, the dimming unit reflects natural light, and color shift occurs between display panels due to different reflectivities of the non-color sub-pixels, which seriously affects the display effect.
Accordingly, there is a need to provide a new display panel, a display device and a control method of the display panel.
Disclosure of Invention
The embodiment of the invention provides a display panel, a display device and a control method of the display panel, aiming at improving the display effect of the display panel.
An embodiment of the present invention provides a display panel, the display panel having a plurality of subpixels, the display panel including a color conversion assembly, the color conversion assembly including: the light shielding layer comprises an isolation structure and a plurality of pixel openings formed by enclosing the isolation structure; the plurality of sub-pixels are respectively positioned in the pixel openings, and each sub-pixel comprises a dimming unit; the light modulation units of the sub-pixels with different colors have different reflectivities, the sizes of the pixel openings are inversely related to the reflectivities of the light modulation units positioned in the pixel openings, and the sizes of the pixel openings for accommodating the sub-pixels with the same color are the same.
According to an aspect of the embodiment of the present invention, the cross-sectional areas of the dimming units of the same color sub-pixel in the thickness direction of the color conversion assembly have the same value, and the cross-sectional areas of the dimming units in the thickness direction are inversely related to the reflectivity of the dimming units.
According to an aspect of the embodiment of the present invention, each subpixel further includes a light source, the subpixels of different colors form a pixel unit, and a ratio of a size of a pixel opening to an area of the pixel unit is referred to as an aperture ratio, and the aperture ratio S satisfies the following relationship:
S＝a/(b+mN)
wherein a is the target brightness, b is the brightness of the light source, m is the ambient light level, and N is the reflectivity of the dimming unit located in the pixel opening.
According to an aspect of an embodiment of the present invention, the plurality of subpixels include first, second, and third subpixels of different colors;
the plurality of pixel openings includes a first pixel opening for accommodating a first sub-pixel, a second pixel opening for accommodating a second sub-pixel, and a third pixel opening for accommodating a third sub-pixel;
the area ratio of the first pixel opening, the second pixel opening and the third pixel opening is (0.812-1.012): (0.805 to 1.005): (0.797-0.997).
According to an aspect of an embodiment of the present invention, the area ratio of the first pixel opening, the second pixel opening, and the third pixel opening is 0.912:0.905:0.897.
According to one aspect of an embodiment of the invention, the area of the first pixel opening is 17510um 2 The area of the second pixel opening is 17376um 2 The area of the third pixel opening is 17222um 2 。
According to an aspect of the embodiment of the present invention, each sub-pixel further includes a light filtering unit, each light filtering unit is located on each light adjusting unit, and a refractive index of each light filtering unit is smaller than a refractive index of its corresponding light adjusting unit.
According to one aspect of the embodiments of the present invention, the refractive index of the filter unit is 1.2 to 1.5.
According to one aspect of the embodiments of the present invention, the thickness of the filter unit is 0.8 μm to 5 μm.
According to one aspect of the embodiments of the present invention, the thickness of the filter unit is 1 μm to 2 μm.
According to an aspect of an embodiment of the invention, the dimming unit comprises a quantum dot material and/or a light scattering material.
According to one aspect of an embodiment of the invention, the light scattering material comprises titanium dioxide nanoparticles.
According to an aspect of the embodiment of the present invention, the thickness of the dimming unit is 5 μm to 15 μm.
According to an aspect of the embodiment of the present invention, the thickness of the dimming unit is 10 μm to 12 μm.
In another aspect, an embodiment of the present invention provides a display device including the above display panel.
In still another aspect, an embodiment of the present invention provides a method for controlling a display panel, where the display panel includes a light source and a color conversion component, the color conversion component includes a light shielding layer and a plurality of sub-pixels, the light shielding layer includes an isolation structure, and a plurality of pixel openings formed by enclosing the isolation structure, each sub-pixel is respectively located in the pixel opening, each sub-pixel includes a dimming unit, and the method for controlling the display panel includes:
acquiring the brightness of the environment;
determining a target brightness of the display panel;
the light source brightness is adjusted according to the ambient light brightness and the target brightness.
According to an aspect of the embodiment of the present invention, the step of adjusting the brightness of the light source according to the ambient light brightness and the target brightness further includes:
acquiring the reflectivity and the pixel opening size of the dimming unit, and determining the brightness of the reflected light according to the brightness of the environment, the reflectivity and the pixel opening size of the dimming unit;
in the step of adjusting the light source luminance according to the ambient light luminance and the target luminance: the brightness of the light source is adjusted according to the brightness of the reflected light and the target brightness, so that the sum of the brightness of the emitted light and the brightness of the reflected light is the target brightness.
In the display panel provided by the embodiment of the invention, the color conversion component of the display panel comprises the shading layer sub-pixels. The isolation structure of the shading layer forms a plurality of pixel openings, and each sub-pixel is positioned in the pixel opening. Each sub-pixel comprises a dimming unit, and the dimming units are used for adjusting light emitted by a light source of the display panel, so that colorized display of the display panel is realized. The pixel openings for accommodating the same-color sub-pixels have the same size, so that the reflective capacities of the dimming units corresponding to the same-color sub-pixels are basically the same, and the uniformity of the display panel on the same-color sub-pixels is ensured. The light modulation units of the sub-pixels with different colors have different reflectivities, and the sizes of the pixel openings are inversely related to the reflectivities of the light modulation units positioned in the light modulation units, namely the corresponding pixel openings of the light modulation units with higher reflectivities are smaller. In general, ambient light enters the dimming unit from the pixel opening, and when the size of the pixel opening and the reflectivity of the dimming unit positioned in the pixel opening are in inverse relation, the reflection light quantity of the dimming units of the sub-pixels with different colors can be blended, so that the color cast of the display panel is reduced, and the display effect of the display panel is improved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar features, and in which the figures are not to scale.
Fig. 1 is a top view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic view of a partial enlarged structure at Q in FIG. 1;
FIG. 3 is a partial cross-sectional view at A-A in FIG. 2;
FIG. 4 is a schematic diagram of a color conversion assembly according to an embodiment of the present invention;
FIG. 5 is a schematic view of a split structure of the portion of the structure of FIG. 4;
fig. 6 is a flowchart of a control method of a display panel according to an embodiment of the present invention.
Reference numerals illustrate:
100. a display panel; 110. a pixel unit; 110a, sub-pixels; 111. a first subpixel; 112. a second subpixel; 113. a third sub-pixel;
10. a drive back plate; 11. a light source;
20. a color conversion component; 21. a light shielding layer; 211. an isolation structure; 212. an accommodation space; 213. a pixel opening; 213a, first pixel openings; 213b, second pixel openings; 213c, third pixel openings; 22. a dimming layer; 221. a dimming unit; 221a, a first dimming unit; 221b, a second dimming unit; 221c, a third dimming unit; 23. a filter layer; 231. a light filtering unit;
30. a first substrate;
40. and a second substrate.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
It will be understood that when a layer, an area, or a structure is described as being "on" or "over" another layer, another area, it can be referred to as being directly on the other layer, another area, or another layer or area can be included between the layer and the other layer, another area. And if the component is turned over, that layer, one region, will be "under" or "beneath" the other layer, another region.
The Micro light emitting diode (Micro-LED) display panel has the advantages of better material stability, longer service life, higher brightness and the like due to the use of inorganic luminescent materials, and has great application prospect.
Currently, micro light emitting diode (Micro-LED) display panels are mainly colorized by combining a blue light source with a color conversion assembly. The color conversion assembly comprises a plurality of dimming units, and the dimming units are used for converting a blue light source into light of other colors so as to realize colorized display. During use of the display panel, the device layer, such as the color conversion assembly, may reflect ambient light, which may result in a decrease in contrast of the display panel.
Furthermore, the applicant has found that the different reflectivities of the dimming cells corresponding to the different color sub-pixels may be caused by the different materials of the dimming cells corresponding to the different color settings in the color conversion assembly. Therefore, the reflected light amounts of the sub-pixels with different colors are different, so that the display picture is color cast, and the display effect of the display panel is seriously affected.
In view of the above, the present invention provides a color conversion assembly, a display panel, a display device and a control method of the display panel. Embodiments of a color conversion assembly, a display panel, and a control method of the display panel will be described below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic top view of a display panel 100 according to an embodiment of the invention.
According to the display panel 100 provided by the embodiment of the invention, the display panel 100 has a display area AA and a non-display area NA surrounding the display area AA. In other alternative embodiments, the display panel 100 may further include the display area AA excluding the non-display area NA. The non-display area NA is disposed at one side of the display area AA in the first direction (X direction in fig. 1), at both sides of the display area AA in the first direction, at one side of the display area AA in the second direction (Y direction in fig. 1), or at both sides of the display area AA in the second direction.
Referring to fig. 2 together, fig. 2 shows an enlarged partial view of the Q region of fig. 1 as an example.
According to the display panel 100 of the embodiment of the invention, a plurality of sub-pixels 110a are disposed in the display area, and the plurality of sub-pixels 110a are arranged in an array along the first direction and the second direction.
The plurality of sub-pixels 110a include, for example, a first sub-pixel 111, a second sub-pixel 112, and a third sub-pixel 113, and a pixel unit 110 formed by combining the first sub-pixel 111, the second sub-pixel 112, and the third sub-pixel 113. The first subpixel 111, the second subpixel 112, and the third subpixel 113 are, for example, a red subpixel, a green subpixel, and a blue subpixel, respectively. The structure of the pixel unit 110 is shown by a dot-dash line in fig. 2, which does not constitute a limitation on the structure of the display panel 100 according to the embodiment of the present invention.
The number of the first sub-pixel 111, the second sub-pixel 112, and the third sub-pixel 113 in the pixel unit 110 may be set in various manners, and the number of the first sub-pixel 111, the second sub-pixel 112, and the third sub-pixel 113 in the pixel unit 110 may be the same, or the first sub-pixel 111, the second sub-pixel 112, and the third sub-pixel 113 in the pixel unit 110 may be different. The number of the first sub-pixel 111, the second sub-pixel 112 and the third sub-pixel 113 in the pixel unit 110 is taken as one for illustration in the embodiment of the present invention.
Referring also to fig. 3, fig. 3 shows a cross-sectional view of an example of fig. 2 at A-A.
According to the display panel 100 provided by the embodiment of the invention, the display panel 100 comprises a driving backboard 10 comprising a plurality of light sources 11; the color conversion assembly 20 is disposed on the driving back plate 10.
In the display panel 100 provided by the embodiment of the invention, the light source 11 is used for emitting light, and the color conversion component 20 is used for mixing colors of the light emitted by the light source 11, so that the colorized display of the display panel 100 is realized.
The display panel 100 may further include, for example, a first substrate 30 disposed on a side of the driving back plate 10 facing away from the color conversion assembly 20, and a second substrate 40 disposed on a side of the color conversion assembly 20 facing away from the driving back plate 10.
Referring to fig. 4 and fig. 5 together, fig. 4 is a schematic structural diagram of a color conversion assembly 20 according to an embodiment of the invention. Fig. 5 is a schematic diagram of the disassembled structure of each component in fig. 4. Fig. 5 is a schematic exploded view of the color conversion assembly 20 according to the embodiment of the present invention, and the relative positions of the components in fig. 5 are not meant to limit the structure of the color conversion assembly 20 according to the embodiment of the present invention. The color conversion assembly 20 may be used as the color conversion assembly 20 in the display panel 100 described above.
The color conversion assembly 20 may also be used for liquid crystal (Liquid Crystal Display, LCD) display panels 100, organic light emitting diode (Organic Light Emitting Display, OLED) display panels 100, and display panels 100 utilizing light emitting diode (Light Emitting Diode, LED) devices.
According to the color conversion assembly 20 provided in the embodiment of the present invention, the color conversion assembly 20 includes: a light shielding layer 21, wherein the light shielding layer 21 comprises an isolation structure 211 and a plurality of pixel openings 213 surrounded by the isolation structure 211; a plurality of sub-pixels 110a respectively located in the pixel openings 213, wherein each sub-pixel 110a respectively includes a dimming unit 221; the light modulation units 221 of the sub-pixels 110a of different colors have different reflectivities, the size of the pixel opening 213 is inversely related to the reflectivity of the light modulation unit 221 located therein, and the size of the pixel opening 213 for accommodating the sub-pixels 110a of the same color is the same.
The color conversion assembly 20 further includes, for example, a dimming layer 22, and a dimming unit 221 is located in the dimming layer 22.
In the color conversion assembly 20 provided in the embodiment of the present invention, the color conversion assembly 20 includes the light shielding layer 21 and the sub-pixels 110a. The isolation structure 211 of the light shielding layer 21 encloses a pixel opening 213, and the sub-pixel 110a is located in the pixel opening 213. The dimming unit 221 adjusts light emitted from the light source 11 of the display panel 100, thereby realizing color display of the display panel 100.
The pixel openings 213 for accommodating the same color sub-pixels 110a have the same size, so that the light modulating units 221 of the same color sub-pixels 110a have substantially the same reflective power, and the uniformity of the display panel 100 for the same color sub-pixels 110a is ensured. The light modulation units 221 of the sub-pixels 110a with different colors have different reflectivities, and the size of the pixel opening 213 is inversely related to the reflectivity of the light modulation unit 221 located therein, that is, the pixel opening 213 corresponding to the light modulation unit 221 with higher reflectivity is smaller, and the pixel opening 213 corresponding to the light modulation unit 221 with lower reflectivity is larger.
In the use process of the display panel 100, ambient light enters the dimming unit 221 from the pixel opening 213, and when the size of the pixel opening 213 and the reflectivity of the dimming unit 221 located therein are in inverse relation, the reflected light amounts of the dimming units 221 of the sub-pixels 110a with different colors can be blended, so that the color shift of the display panel 100 is reduced, and the display effect of the display panel 100 is improved.
Optionally, the isolation structure 211 of the light shielding layer 21 further encloses an accommodating space 212, and the accommodating space 212 communicates with the pixel opening 213. The dimming unit 221 is located in the accommodating space 212.
In the light shielding layer 21, the insulating structure 211 is made of various materials, for example, a reflective layer, for example, a reflective metal material layer, is coated on the surface of the insulating structure 211, so that the insulating structure 211 can reflect light, and the insulating structure 211 can not only prevent light in two adjacent accommodating spaces 212 from being mixed, but also reflect light reaching the surface of the insulating structure 211, thereby improving the absorption and conversion rate of the light by the light modulation unit 221. Alternatively, the surface of the isolation structure 211 is coated with a light absorbing layer, such as a black light absorbing material layer, so that the isolation structure 211 can prevent light in the adjacent two accommodation spaces 212 from being mixed. Alternatively, the isolation structure 211 may be made of a metal reflective material or a black light absorbing material.
In the display panel 100, the light sources 11 are disposed corresponding to the accommodation spaces 212, respectively, so that the dimming units 221 within the pixel openings 213 can dim the light emitted from the light sources 11.
Alternatively, the first subpixel 111 includes a first dimming unit 221a, the second subpixel 112 includes a second dimming unit 221b, and the third subpixel 113 includes a third dimming unit 221c. The pixel opening 213 includes a first pixel opening 213a for accommodating the first subpixel 111, a second pixel opening 213b for accommodating the second subpixel 112, and a third pixel opening 213c for accommodating the third subpixel 113.
The size of the pixel opening 213 is inversely proportional to the reflectivity of the dimming unit 221 located therein, i.e., the size of the first pixel opening 213a is inversely proportional to the reflectivity of the first dimming unit 221a, i.e., the size of the second pixel opening 213b is inversely proportional to the reflectivity of the second dimming unit 221b, i.e., the size of the third pixel opening 213c is inversely proportional to the reflectivity of the third dimming unit 221c.
The pixel openings 213 of the same color sub-pixels 110a are the same in size, i.e., the pixel openings 213 for accommodating the first sub-pixels 111 are the same in size, and the first pixel openings 213a are the same in size; the pixel openings 213 for accommodating the second sub-pixels 112 are the same in size, and the second pixel openings 213b are the same in size; the pixel openings 213 for accommodating the third sub-pixels 113 are the same in size, and the respective third pixel openings 213c are the same in size.
The dimming unit 221 may be disposed in various manners, and the dimming unit 221 includes, for example, a scattering material, so that the dimming unit 221 can scatter light emitted from the light source 11. Or the dimming unit 221 includes a light conversion material such that the dimming unit 221 can convert light emitted from the light source 11 into light of other colors. For example, the dimming unit 221 includes red or green Quantum Dots (QDs), so that the dimming unit 221 can emit red or green light corresponding to the sub-pixels under the excitation of the light emitted from the light source 11. Alternatively, the dimming unit 221 includes a scattering material and a light conversion material, so that the dimming unit 221 has functions of scattering and color conversion.
The light conversion material is, for example, a quantum dot material including, for example, cadmium-containing species such as CdS/CdSe, etc. The quantum dot material may also be cadmium-free, such as InP, for example. The quantum dot material may also be, for example, a perovskite. The light scattering material is, for example, titanium dioxide nanoparticles.
The thickness of the light adjusting unit 221 is, for example, 5 μm to 15 μm. Optionally, the thickness of the dimming unit is 10 μm to 12 μm.
For example, when the light emitted from the light source 11 on the display panel 100 is UV light, the dimming unit 221 may include a red dimming unit, a green dimming unit, and a blue dimming unit for adjusting the UV light into red, green, and blue light, respectively. Or when the light emitted from the light source 11 on the display panel 100 is blue light, the dimming unit 221 may include a red dimming unit, a green dimming unit, and a blue dimming unit, respectively, for adjusting the blue light into red light and green light, respectively, and the blue dimming unit for adjusting the blue light or transmitting the blue light.
In some alternative embodiments, the cross-sectional area of the dimming unit 221 in the thickness direction (Z direction in fig. 4) of the color conversion assembly 20 corresponds to the same color sub-pixel value, and the cross-sectional area of the dimming unit 221 in the thickness direction is inversely related to the reflectivity thereof.
In these alternative embodiments, the cross-sectional area of the dimming unit 221 in the thickness direction is inversely related to the reflectivity of the dimming unit 221, that is, the cross-sectional area of the dimming unit 221 with higher reflectivity is smaller, so that the reflected light amounts of the dimming units 221 corresponding to the sub-pixels with different colors can be blended, the color shift of the display panel 100 can be reduced, and the display effect of the display panel 100 can be improved.
When the dimming unit 221 has a preset thickness in the thickness direction, the cross-sectional area of the dimming unit 221 in the thickness direction may be the cross-sectional area of any position of the dimming unit 221 in the thickness direction.
For example, when the color conversion assembly 20 is disposed on the driving back plate 10 of the display panel 100, the light shielding layer 21 is disposed on the driving back plate 10, the dimming unit 221 is disposed in the accommodating space 212, and the dimming unit 221 has a first surface facing toward the driving back plate 10 and a second surface facing away from the driving back plate 10. The cross-sectional area of the dimming unit 221 in the thickness direction may be the area of the first surface, or the cross-sectional area of the dimming unit 221 in the thickness direction may be the area of the second surface, or the cross-sectional area of the dimming unit 221 in the thickness direction may be the cross-sectional area of any position between the first surface and the second surface.
The ratio of the area of the pixel opening 213 to the area of the pixel unit 110 is the aperture ratio.
In some alternative embodiments, the aperture ratio S satisfies the following relationship:
S＝a/(b+mN) (1)
where a is the target brightness, b is the brightness of the light source 11, m is the ambient light level, and N is the reflectivity of the dimming unit 221 located in the pixel opening 213.
In these alternative embodiments, when the aperture ratio satisfies the above-described relationship, the reflected light amount can be made to harmonize the display of the display panel 100 so that the sum of the light amount of the emitted light and the light amount of the reflected light is closer to the target luminance.
For example, the first subpixel 111 is a red subpixel, and the aperture ratio S1 of the first pixel aperture 213a satisfies the following relationship:
S1＝a1/(b+mN1) (2)
where a1 is the target brightness of the first subpixel 111, and N1 is the reflectivity of the first dimming unit 221 a.
During the use of the display panel 100, the brightness of the red light emitted by the display panel 100 is the product of the aperture ratio S1 of the first pixel aperture 213a and the brightness of the light source. The brightness of the red light reflected by the display panel 100 is a product of the aperture ratio S1 of the first pixel aperture 213a, the ambient light brightness, and the reflectivity N1 of the first dimming unit 221 a. Then, the red light luminance Q2 finally displayed by the display panel 100 can be obtained by the following relation:
Q1＝S1×b+S1×m×N1 (3)
by substituting the above formula (2) into formula (3), x1=a1 can be finally obtained. That is, regardless of manufacturing errors, the red luminance of the final display is equal to the target luminance. In the display panel 100 according to the embodiment of the invention, the display brightness of the display panel 100 can be modified according to the reflected light, so that the display brightness of the display panel 100 is closer to the target brightness, the color shift of the display panel 100 is improved, and the contrast of the display panel 100 is improved.
Similarly, if the second sub-pixel 112 is a green sub-pixel, the aperture ratio S2 of the second pixel aperture 213b satisfies the following relationship:
S2＝a2/(b+mN2) (4)
where a2 is the target brightness of the second sub-pixel 112, and N2 is the reflectivity of the second dimming unit 221 b.
In the use process of the display panel 100, the brightness of green light emitted by the display panel 100 is the product of the aperture ratio S2 of the second pixel aperture 213b and the brightness of the light source. The green light reflected by the display panel 100 has a brightness equal to a product of an aperture ratio S2 of the second pixel aperture 213b, an ambient light brightness, and a reflectivity N2 of the second dimming unit 221 b. Then, the green light luminance Q2 finally displayed by the display panel 100 can be obtained by the following relation:
Q2＝S2×b+S2×m×N2 (5)
taking the above formula (4) into formula (5), q2=a2 can be finally obtained. That is, regardless of manufacturing errors, the finally displayed green luminance is the target luminance of the second sub-pixel 112. I.e. the displayed green luminance is the target green luminance.
Similarly, if the third sub-pixel 113 is a blue sub-pixel, the aperture ratio S3 of the third pixel aperture 213c satisfies the following relationship:
S3＝a3/(b+mN3) (6)
where a3 is the target brightness of the third sub-pixel, and N is the reflectivity of the third dimming unit 221c. .
In the use process of the display panel 100, the blue light emitted by the display panel 100 is the product of the aperture ratio S3 of the third pixel aperture 213c and the light source brightness. The blue light reflected by the display panel 100 is a product of the aperture ratio S2 of the third pixel aperture 213c, the ambient light and the reflectance N2 of the third dimming unit 221c. Then, the blue light luminance Q3 finally displayed by the display panel 100 can be obtained by the following relation:
Q3＝S2×b+S2×m×N3 (7)
taking the above formula (6) into formula (7), q3=a3 can be finally obtained. That is, regardless of manufacturing errors, the finally displayed blue light luminance is the target luminance of the third sub-pixel 113. I.e. the blue light intensity displayed is the target blue light intensity.
In some alternative embodiments, the ratio of the areas of the first pixel opening 213a, the second pixel opening 213b, and the third pixel opening 213c may be determined to be (0.812-1.012) using the above relationships (2), (4), and (6): (0.805 to 1.005): (0.797 to 0.997), the ratio of the areas of the further first pixel opening 213a, the second pixel opening 213b and the third pixel opening 213c is: 0.912:0.905:0.897. when the ratio of the areas of the first pixel opening 213a, the second pixel opening 213b and the third pixel opening 213c is within the above range, the influence of the ambient light reflection on the display panel can be well harmonized, the contrast ratio of the display panel is improved, and the display effect of the display panel is improved.
If the brightness of the target white light is 500nits, the brightness of the first sub-pixel 111, the second sub-pixel 112 and the third sub-pixel 113 are 115nits, 370nits and 15nits, respectively. The reflectances of the first, second and third dimming units 221a, 221b and 221c are 8.8%, 9.5% and 10.3%, respectively. Taking 60PPI as an example, the size of each pixel unit 110 is 423um×423um, and the area of the first pixel opening 213a is 17510um can be obtained by using the above relation 2 . The second pixel opening 213b has an area of 17376um 2 The area of the third pixel opening 213c is 17222um 2 。
The refractive index between the dimming layer 22 and air is larger, so that the light extraction rate of the display panel 100 is not high, and the power consumption is larger.
In some alternative embodiments, the sub-pixel 110a further includes a plurality of light filtering units 231, each light filtering unit 231 is located on each light adjusting unit 221, and the refractive index of each light filtering unit 231 is smaller than the refractive index of its corresponding light adjusting unit 221. For example, color conversion assembly 20 further includes a filter layer 23, filter layer 23 is disposed on dimming layer 22, and a plurality of filter units 231 are disposed on filter layer 22.
In these alternative embodiments, the refractive index of the light filtering unit 231 is smaller than that of the corresponding dimming unit 221, so that the light emitting rate of the display panel 100 can be improved, and the power consumption of the display panel 100 can be reduced.
Alternatively, the refractive index of the filter unit 231 is 1.2 to 1.5.
Optionally, the material of the filter unit 231 includes color film photoresist. Alternatively, the thickness of the filter unit 231 is 0.8 μm to 5 μm. The thickness of the filter unit 231 is preferably 1 μm to 2 μm.
The third embodiment of the present invention also provides a display device including the display panel 100. The display device in the embodiment of the invention comprises, but is not limited to, a mobile phone, a personal digital assistant (Personal Digital Assistant, abbreviated as PDA), a tablet computer, an electronic book, a television, an access control, a smart phone, a console and other devices with display functions. Since the display device of the present invention includes the display panel 100, the display device of the present embodiment has the beneficial effects of the display panel 100, and is not described herein.
Referring to fig. 6, the fourth embodiment of the present invention further provides a control method of the display panel 100, where the display panel 100 is the display panel 100 in any of the above embodiments, and the control method of the display panel 100 includes:
step S01: and obtaining the ambient light brightness.
Step S02: and determining the target brightness of the display panel.
Step S03: and adjusting the brightness of the light source according to the ambient brightness and the target brightness.
In the control method of the embodiment of the invention, the brightness of the light source 11 is corrected according to the target brightness and the ambient light brightness, so that the sum of the emitted brightness and the reflected brightness is more approximate to the target brightness, that is, the display brightness of the display panel is the target brightness, the color shift of the display panel 100 can be effectively improved, and the display effect of the display panel 100 can be improved.
Before step S03, for example, further comprising obtaining the reflectance of the dimming unit 221 and the pixel opening 213 size, determining the reflected light luminance according to the ambient light luminance, the reflectance of the dimming unit 221, and the pixel opening 213 size, and adjusting the luminance of the light source 11 according to the reflected light luminance and the target luminance so that the sum of the emitted light luminance and the reflected light luminance is the target luminance in step S03.
In these alternative embodiments, the reflected light brightness is first determined according to the ambient light brightness, the reflectivity of the dimming unit 221, and the pixel opening 213 size, then the light source 11 brightness is adjusted, and the emitted light brightness may be determined according to the light source 11 brightness and the pixel opening 213 size, so that the sum of the emitted light brightness and the reflected light brightness is finally the target brightness. According to the embodiment of the invention, the brightness of the light source 11 is corrected by the reflected light, so that the final display brightness of the display panel 100 is closer to the target brightness, the color cast of the display panel 100 can be effectively improved, and the display effect of the display panel 100 is improved.
In accordance with the above embodiments of the invention, these embodiments are not exhaustive of all details, nor are they intended to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (16)
1. A display panel having a plurality of subpixels, the display panel comprising a color conversion assembly comprising:
the light shielding layer comprises an isolation structure and a plurality of pixel openings formed by enclosing the isolation structure;
a plurality of sub-pixels respectively positioned in the pixel openings, wherein each sub-pixel respectively comprises a light modulation unit, and the light modulation units comprise quantum dot materials; each sub-pixel further comprises a light filtering unit, each light filtering unit is respectively positioned on each light adjusting unit, and the refractive index of each light filtering unit is smaller than that of the corresponding light adjusting unit;
the light modulating units of the sub-pixels of different colors have different reflectivities, the size of the pixel opening is inversely related to the reflectivities of the light modulating units positioned therein, and the sizes of the pixel openings for accommodating the sub-pixels of the same color are the same.
2. The display panel according to claim 1, wherein the cross-sectional areas of the light-adjusting units of the same color of the sub-pixels in the thickness direction of the color conversion assembly have the same value, and the cross-sectional areas of the light-adjusting units in the thickness direction are inversely related to the reflectivity thereof.
3. The display panel of claim 1, wherein each of the sub-pixels further comprises a light source, the sub-pixels of different colors form a pixel unit, a ratio of a size of the pixel opening to an area of the pixel unit is referred to as an aperture ratio, and the aperture ratio S satisfies the following relationship:
S＝a/(b+mN)
wherein a is the target brightness, b is the brightness of the light source, m is the ambient light brightness, and N is the reflectivity of the dimming unit located in the pixel opening.
4. The display panel according to claim 3, wherein,
the plurality of subpixels comprise first subpixels, second subpixels and third subpixels with different colors;
the plurality of pixel openings includes a first pixel opening for receiving the first sub-pixel, a second pixel opening for receiving the second sub-pixel, and a third pixel opening for receiving the third sub-pixel;
the area ratio of the first pixel opening, the second pixel opening, and the third pixel opening is (0.812-1.012): (0.805 to 1.005): (0.797-0.997).
5. The display panel of claim 4, wherein the area ratio of the first pixel opening, the second pixel opening, and the third pixel opening is 0.912:0.905:0.897.
6. The display panel of claim 4, wherein the first pixel opening has an area of 17510um 2 The area of the second pixel opening is 17376um 2 The area of the third pixel opening is 17222um 2 。
7. The display panel according to claim 1, wherein the refractive index of the filter unit is 1.2 to 1.5.
8. The display panel according to claim 7, wherein the thickness of the filter unit is 0.8 μm to 5 μm.
9. The display panel according to claim 7, wherein the thickness of the filter unit is 1 μm to 2 μm.
10. The display panel of claim 1, wherein the dimming unit comprises a light scattering material.
11. The display panel of claim 10, wherein the light scattering material comprises titanium dioxide nanoparticles.
12. The display panel according to claim 1, wherein the thickness of the dimming unit is 5 μm to 15 μm.
13. The display panel according to claim 1, wherein the thickness of the dimming unit is 10 μm to 12 μm.
14. A display device, comprising: the display panel of any one of claims 1-13.
15. A control method of a display panel, characterized in that the display panel according to any one of claims 1 to 13 is controlled, the control method of the display panel comprising:
acquiring the brightness of the environment;
determining a target brightness of the display panel;
and adjusting the brightness of the light source according to the ambient brightness and the target brightness.
16. The method of claim 15, wherein the step of adjusting the light source brightness in accordance with the ambient light brightness and the target brightness is preceded by the step of:
acquiring the reflectivity of the dimming unit and the pixel opening size, and determining the brightness of the reflected light according to the brightness of the environment, the reflectivity of the dimming unit and the pixel opening size;
the step of adjusting the light source brightness according to the ambient light brightness and the target brightness comprises: and adjusting the brightness of the light source according to the brightness of the reflected light and the target brightness, so that the sum of the brightness of the emitted light and the brightness of the reflected light is the target brightness.
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