CN114167639A - 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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- CN114167639A CN114167639A CN202010954909.6A CN202010954909A CN114167639A CN 114167639 A CN114167639 A CN 114167639A CN 202010954909 A CN202010954909 A CN 202010954909A CN 114167639 A CN114167639 A CN 114167639A
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- 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
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- 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
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- 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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- 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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- 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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- 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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- 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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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 assembly, and the color conversion assembly comprises: the light shielding layer comprises an isolation structure and a plurality of pixel openings formed by the enclosure of the isolation structure; a plurality of sub-pixels respectively located in the spaced pixel openings, each sub-pixel respectively including a dimming unit; the light modulation units of the sub-pixels with different colors have different reflectivities, the size of the pixel opening is in inverse proportion to the reflectivity of the light modulation unit in the pixel opening, 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 adjust the reflected light quantity of the light adjusting unit corresponding to the sub-pixels with different colors, reduce the color cast 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
Flat Display panels, such as Liquid Crystal Display (LCD) panels, Organic Light Emitting Diode (OLED) panels, and Display panels using Light Emitting Diode (LED) devices, have advantages of high image quality, power saving, thin body, and wide application range, and are widely used in various consumer electronics products, such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and become the mainstream of Display devices.
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 due to different reflectivities of the sub-pixels without using colors, color shift occurs between the display panels, which seriously affects the display effect.
Therefore, it is desirable 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, and aims to improve the display effect of the display panel.
An embodiment of the present invention provides a display panel, the display panel has a plurality of sub-pixels, the display panel includes a color conversion module, the color conversion module includes: the light shielding layer comprises an isolation structure and a plurality of pixel openings formed by the enclosure of the isolation structure; a plurality of sub-pixels respectively located in the pixel openings, each sub-pixel respectively including a dimming unit; the light modulation units of the sub-pixels with different colors have different reflectivities, the size of the pixel opening is in inverse proportion to the reflectivity of the light modulation unit in the pixel opening, 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 area of the dimming unit in the thickness direction is in an inverse relationship with the reflectivity thereof.
According to an aspect of the embodiments of the present invention, each sub-pixel further includes a light source, the sub-pixels of different colors form a pixel unit, 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 brightness, and N is the reflectivity of the light modulation unit in the pixel opening.
According to an aspect of an embodiment of the present invention, the plurality of sub-pixels includes a first sub-pixel, a second sub-pixel, and a third sub-pixel that are different in color;
the plurality of pixel openings comprise a first pixel opening for accommodating the first sub-pixel, a second pixel opening for accommodating the second sub-pixel and a third pixel opening for accommodating the third sub-pixel;
the area ratio of the first pixel opening to the second pixel opening to the third pixel opening is (0.812-1.012): (0.805-1.005): (0.797-0.997).
According to an aspect of an embodiment of the present invention, an 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 an aspect of an embodiment of the present invention, the first pixel opening has an area of 17510um2The area of the second pixel opening is 17376um2And the area of the third pixel opening is 17222um2。
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 respectively 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 an aspect of the embodiment of the invention, the refractive index of the filter unit is 1.2-1.5.
According to an aspect of an embodiment of the invention, the thickness of the filter unit is 0.8 μm to 5 μm.
According to an aspect of an embodiment of the present invention, the thickness of the filtering unit is 1 μm to 2 μm.
According to an aspect of embodiments of the present invention, the dimming cell 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 an embodiment of the present invention, the dimming cell has a thickness of 5 μm to 15 μm.
According to an aspect of an embodiment of the present invention, the dimming cell has a thickness of 10 μm to 12 μm.
On the other hand, an embodiment of the invention provides a display device including the display panel.
In 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 surrounded by the isolation structure, each sub-pixel is located in a pixel opening, and each sub-pixel includes a dimming unit, and the method for controlling the display panel includes:
obtaining 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 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 comprises:
obtaining the reflectivity and the pixel opening size of the dimming unit, and determining the brightness of reflected light according to the ambient light brightness, the reflectivity of the dimming unit and the pixel opening size;
the method comprises the following steps of adjusting the brightness of a light source according to the ambient light brightness and the target brightness: 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.
In the display panel provided by the embodiment of the invention, the color conversion component of the display panel comprises the light-shielding 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 light adjusting unit which adjusts light emitted by a light source of the display panel, and therefore colorization display of the display panel is achieved. The pixel openings for accommodating the same color sub-pixels are the same in size, so that the reflection capacities of the dimming units corresponding to the same color sub-pixels are basically the same, and the display uniformity of the display panel for the same color sub-pixels is ensured. The light modulation units of the sub-pixels with different colors have different reflectivities, and the size of the pixel opening is in inverse proportion to the reflectivity of the light modulation unit in the pixel opening, namely the pixel opening corresponding to the light modulation unit with higher reflectivity is smaller. When the size of the pixel opening and the reflectivity of the dimming unit in the pixel opening are in an inverse proportion relation, the reflected light quantity of the dimming unit of the sub-pixels with different colors can be adjusted, 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 invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which 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 an enlarged partial schematic view of FIG. 1 at Q;
FIG. 3 is a partial cross-sectional view taken at A-A in FIG. 2;
FIG. 4 is a schematic structural diagram of a color conversion module according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a split structure of the partial 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.
Description of reference numerals:
100. a display panel; 110. a pixel unit; 110a, sub-pixels; 111. a first sub-pixel; 112. a second sub-pixel; 113. a third sub-pixel;
10. driving the back plate; 11. a light source;
20. a color conversion component; 21. a light-shielding layer; 211. an isolation structure; 212. an accommodating space; 213. a pixel opening; 213a, a first pixel opening; 213b, a second pixel opening; 213c, a third pixel opening; 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. 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 objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting 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 present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
The Micro light emitting diode (Micro-LED) display panel uses inorganic luminescent materials, so the Micro light emitting diode display panel has the advantages of better material stability, longer service life, higher brightness and the like, and has very great application prospect.
Currently, Micro light emitting diode (Micro-LED) display panels are colored mainly by a blue light source in combination with a color conversion component. The color conversion assembly comprises a plurality of dimming units, and the dimming units are used for converting the blue light source into light with other colors, so that colorized display is realized. During use of the display panel, device layers, such as color conversion components, reflect ambient light, which reflection causes a reduction in the contrast of the display panel.
In addition, the applicant has found that due to the different materials of the dimming cells corresponding to different color settings in the color conversion assembly, the reflectivity of the dimming cells corresponding to different color sub-pixels may be different. Therefore, the different amounts of reflected light of the sub-pixels with different colors can cause color shift of the display screen, and the display effect of the display panel is seriously affected.
In view of the above problems, the present invention provides a color conversion module, a display panel, a display device and a control method of the display panel. Embodiments of a color conversion module, 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 illustrating 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. Or the non-display area NA is disposed on one side of the display area AA in the first direction (X direction in fig. 1), or the non-display area NA is disposed on both sides of the display area AA in the first direction, or the non-display area NA is disposed on one side of the display area AA in the second direction (Y direction in fig. 1), or the non-display area NA is disposed on both sides of the display area AA in the second direction.
Referring also to fig. 2, fig. 2 shows an enlarged partial view of an exemplary region Q of fig. 1.
According to the display panel 100 of the embodiment of the invention, a plurality of sub-pixels 110a are arranged 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 includes, 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 the combination of the first sub-pixel 111, the second sub-pixel 112, and the third sub-pixel 113. The first sub-pixel 111, the second sub-pixel 112, and the third sub-pixel 113 are, for example, a red sub-pixel, a green sub-pixel, and a blue sub-pixel, respectively. The structure of the pixel unit 110 is shown in fig. 2 by a chain line, and the chain line does not limit 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 ways, 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 are different from each other. In the embodiment of the present invention, the numbers of the first sub-pixel 111, the second sub-pixel 112, and the third sub-pixel 113 in the pixel unit 110 are respectively illustrated as one.
Referring also to fig. 3, fig. 3 shows an exemplary cross-sectional view at a-a of fig. 2.
According to the display panel 100 provided by the embodiment of the present invention, the display panel 100 includes a driving back plate 10 including a plurality of light sources 11; and the color conversion assembly 20 is arranged on the driving backboard 10.
In the display panel 100 provided in the embodiment of the present invention, the light source 11 is configured to emit light, and the color conversion component 20 is configured to perform color modulation on the light emitted by the light source 11, so as to implement color display of the display panel 100.
The display panel 100 may further include, for example, a first substrate 30 disposed on a side of the driving backplane 10 facing away from the color conversion assembly 20, and a second substrate 40 disposed on the color conversion assembly 20 facing away from the driving backplane 10.
Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a color conversion device 20 according to an embodiment of the present invention. Fig. 5 is a disassembled structure diagram of the parts in fig. 4. Fig. 5 is a schematic disassembled structure diagram for better understanding the structure of each component in the color conversion assembly 20 according to the embodiment of the present invention, and the relative positions of each component in fig. 5 do not limit the structure of the color conversion assembly 20 according to the embodiment of the present invention. The color conversion member 20 may be used as the color conversion member 20 in the above-described display panel 100.
The color conversion assembly 20 may also be used for a Liquid Crystal Display (LCD) Display panel 100, an Organic Light Emitting Diode (OLED) Display panel 100, and a Display panel 100 using a LED device.
According to the color conversion module 20 provided by the embodiment of the present invention, the color conversion module 20 includes: a light-shielding layer 21, wherein the light-shielding layer 21 includes 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, each sub-pixel 110a respectively including a light modulation unit 221; the reflectivities of the dimming cells 221 of the sub-pixels 110a of different colors are different, the size of the pixel opening 213 is in inverse proportion to the reflectivity of the dimming cell 221 located therein, and the sizes of the pixel openings 213 for accommodating the sub-pixels 110a of the same color are the same.
The color conversion assembly 20 further includes, for example, a dimming layer 22, and the dimming unit 221 is located within the dimming layer 22.
In the color conversion member 20 provided by the embodiment of the present invention, the color conversion member 20 includes the light shielding layer 21 and the sub-pixel 110 a. The isolation structures 211 of the light-shielding layer 21 enclose the pixel openings 213, and the sub-pixels 110a are located in the pixel openings 213. The dimming unit 221 adjusts light emitted from the light source 11 of the display panel 100, thereby realizing a 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 reflection capacities of the dimming cells 221 of the same color sub-pixels 110a are substantially the same, and the uniformity of the display of the same color sub-pixels 110a by the display panel 100 is ensured. The reflectivities of the dimming cells 221 of the sub-pixels 110a with different colors are different, and the sizes of the pixel openings 213 are in inverse proportion to the reflectivities of the dimming cells 221 located therein, i.e., the pixel opening 213 corresponding to the dimming cell 221 with higher reflectivity is smaller, and the pixel opening 213 corresponding to the dimming cell 221 with lower reflectivity is larger.
When the size of the pixel opening 213 and the reflectivity of the dimming cell 221 located therein are in an inverse proportion relationship, the amount of reflected light of the dimming cell 221 of the sub-pixel 110a with different colors can be adjusted, 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 to form an accommodating space 212, and the accommodating space 212 is communicated with the pixel opening 213. The dimming unit 221 is located in the accommodating space 212.
In the light shielding layer 21, the isolation structure 211 is made of various materials, for example, the surface of the isolation structure 211 is coated with a reflective layer, for example, a reflective metal material layer, so that the isolation structure 211 can reflect light, the isolation structure 211 can prevent the light in the two adjacent accommodating spaces 212 from mixing light, and can reflect the light reaching the surface of the isolation structure 211, thereby improving the absorption conversion rate of the dimming unit 221 to the light. 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 the light in two adjacent accommodating spaces 212 from mixing. Alternatively, the isolation structures 211 may also be made of a metal light reflecting material or a black light absorbing material.
In the display panel 100, the light sources 11 are disposed corresponding to the accommodating spaces 212, respectively, so that the dimming cells 221 in the pixel openings 213 can dim the light emitted from the light sources 11.
Optionally, the first sub-pixel 111 includes a first dimming unit 221a, the second sub-pixel 112 includes a second dimming unit 221b, and the third sub-pixel 113 includes a third dimming unit 221 c. The pixel opening 213 includes a first pixel opening 213a for accommodating the first sub-pixel 111, a second pixel opening 213b for accommodating the second sub-pixel 112, and a third pixel opening 213c for accommodating the third sub-pixel 113.
The size of the pixel aperture 213 is inversely related to the reflectivity of the dimming cell 221 located therein, i.e., the size of the first pixel aperture 213a is inversely related to the reflectivity of the first dimming cell 221a, i.e., the size of the second pixel aperture 213b is inversely related to the reflectivity of the second dimming cell 221b, i.e., the size of the third pixel aperture 213c is inversely related to the reflectivity of the third dimming cell 221 c.
The pixel openings 213 of the sub-pixels 110a of the same color have the same size, that is, the pixel openings 213 for accommodating the first sub-pixels 111 have the same size, and the first pixel openings 213a have the same size; the pixel openings 213 for accommodating the second sub-pixels 112 have the same size, and the second pixel openings 213b have the same size; the pixel openings 213 for receiving the third sub-pixels 113 have the same size, and the third pixel openings 213c have the same size.
The dimming unit 221 may be provided in various manners, and the dimming unit 221 may include, 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 so that the dimming unit 221 can convert the light emitted from the light source 11 into light of other colors. For example, the dimming cell 221 includes a red or green Quantum Dot (QD), so that the dimming cell 221 can emit light of a red or green color corresponding to the sub-pixel under excitation of the light emitted from the light source 11. Alternatively, the dimming cell 221 includes a scattering material and a light conversion material, so that the dimming cell 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 and the like. The quantum dot material may also be, for example, cadmium-free, such as InP and the like. The quantum dot material may also be, for example, perovskite-type. 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 dimming the UV light into red light, green light, and blue light, respectively. Or when the light emitted by 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, where the red dimming unit and the green dimming unit are used to adjust the blue light into red light and green light, respectively, and the blue dimming unit is used to adjust the blue light or transmit the blue light.
In some alternative embodiments, the cross-sectional area of the dimming cell 221 in the thickness direction (Z direction in fig. 4) of the color conversion assembly 20 corresponds to the same color sub-pixel, and the cross-sectional area of the dimming cell 221 in the thickness direction is in an inverse relationship with its own reflectivity.
In these alternative embodiments, the cross-sectional area of the dimming unit 221 in the thickness direction is in inverse proportion to its own reflectivity, 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 different color sub-pixels can be adjusted, the color shift of the display panel 100 is reduced, and the display effect of the display panel 100 is improved.
When the dimming cell 221 has a preset thickness in the thickness direction, the cross-sectional area of the dimming cell 221 in the thickness direction may be a cross-sectional area of the dimming cell 221 at any position 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 light dimming unit 221 is located in the accommodating space 212, and the light dimming unit 221 has a first surface facing the driving back plate 10 and a second surface facing away from the driving back plate 10. The cross-sectional area of the dimming cell 221 in the thickness direction may be an area of the first surface, or the cross-sectional area of the dimming cell 221 in the thickness direction is an area of the second surface, or the cross-sectional area of the dimming cell 221 in the thickness direction is a cross-sectional area at 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 opening 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 brightness, 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 relationship, the reflected light amount can be made to blend 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 more approaches 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 sub-pixel 111, and N1 is the reflectivity of the first dimming unit 221 a.
During the use of the display panel 100, the luminance 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 luminance of the light source. The brightness of the red light reflected by the display panel 100 is the 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 using the following relation:
Q1＝S1×b+S1×m×N1 (3)
bringing formula (2) into formula (3) can finally yield X1 ═ a 1. That is, the luminance of the finally displayed red light is equal to the target luminance regardless of the manufacturing error. In the display panel 100 according to the embodiment of the present invention, the display brightness of the display panel 100 can be corrected 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 opening 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.
During the use of the display panel 100, the brightness of the green light emitted by the display panel 100 is the product of the aperture ratio S2 of the second pixel opening 213b and the brightness of the light source. The brightness of the green light reflected by the display panel 100 is the product of the aperture ratio S2 of the second pixel aperture 213b, the ambient light brightness, and the reflectivity N2 of the second dimming cell 221 b. Then, the green luminance Q2 finally displayed by the display panel 100 can be obtained by using the following relation:
Q2＝S2×b+S2×m×N2 (5)
by bringing formula (4) into formula (5), Q2 ═ a2 can be obtained. That is, the brightness of the green light finally displayed is the target brightness of the second sub-pixel 112 without considering the manufacturing error. I.e. the displayed green brightness is the target green brightness.
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 221 c. .
During the use of the display panel 100, the luminance of 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 luminance of the light source. The brightness of the blue light reflected by the display panel 100 is the product of the aperture ratio S2 of the third pixel aperture 213c, the ambient light brightness, and the reflectivity N2 of the third dimming unit 221 c. Then, the blue luminance Q3 finally displayed by the display panel 100 can be obtained by using the following relation:
Q3＝S2×b+S2×m×N3 (7)
by bringing formula (6) into formula (7), Q3 ═ a3 can be obtained. That is, the luminance of the finally displayed blue light is the target luminance of the third sub-pixel 113, regardless of the manufacturing error. I.e. the displayed blue luminance is the target blue luminance.
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 can be determined to be (0.812-1.012) by using the relations (2), (4) and (6): (0.805-1.005): (0.797-0.997), the ratio of the areas of the 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 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 is 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 above relationship can be used to obtain theThe area of a pixel opening 213a is 17510um2. The area of the second pixel opening 213b is 17376um2The area of the third pixel opening 213c is 17222um2。
The refractive index between the light modulation layer 22 and the air is large, so that the light extraction rate of the display panel 100 is not high, and the power consumption is large.
In some optional embodiments, the sub-pixel 110a further includes a plurality of light filtering units 231, each light filtering unit 231 is respectively located on each light modulating unit 221, and the refractive index of each light filtering unit 231 is smaller than the refractive index of its corresponding light modulating unit 221. For example, the color conversion member 20 further includes a filter layer 23, the filter layer 23 is disposed on the light modulation layer 22, and a plurality of filter units 231 is disposed on the filter layer 22.
In these alternative embodiments, the refractive index of the 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.
Optionally, the refractive index of the filtering unit 231 is 1.2 to 1.5.
Optionally, the material of the filtering unit 231 includes a color filter photoresist. Optionally, the thickness of the filtering 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 further provides a display device, including the display panel 100. The display device in the embodiment of the present invention includes, but is not limited to, a mobile phone, a Personal Digital Assistant (PDA), a tablet computer, an electronic book, a television, a door lock, a smart phone, a console, and other devices having a display function. 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 the description thereof is omitted here.
Referring to fig. 6, a fourth embodiment of the present invention further provides a control method of a 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 brightness of the environment light.
Step S02: determining a target brightness of the display panel.
Step S03: and adjusting the brightness of the light source according to the ambient light brightness and the target brightness.
In the control method according to the embodiment of the present 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 light brightness and the reflected light brightness is closer to the target brightness, that is, the display brightness of the display panel is the target brightness, which can effectively improve the color shift of the display panel 100 and improve the display effect of the display panel 100.
Before step S03, for example, the method further includes obtaining the reflectivity of the dimming cell 221 and the size of the pixel opening 213, determining the brightness of the reflected light according to the ambient light brightness, the reflectivity of the dimming cell 221 and the size of the pixel opening 213, and adjusting the brightness of the light source 11 according to the brightness of the reflected light and the target brightness in step S03 so that the sum of the brightness of the emitted light and the brightness of the reflected light is the target brightness.
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 size of the pixel opening 213, and 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 size of the pixel opening 213, so that the sum of the emitted light brightness and the reflected light brightness is the target brightness. The embodiment of the invention corrects the brightness of the light source 11 through 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 present invention, these embodiments are not exhaustive and do not 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 embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A display panel having a plurality of sub-pixels, the display panel comprising a color conversion component, the color conversion component comprising:
the light shielding layer comprises an isolation structure and a plurality of pixel openings surrounded by the isolation structure;
a plurality of sub-pixels respectively located in the pixel openings, each sub-pixel respectively including a dimming unit;
the sub-pixels of different colors have different reflectivities of the dimming units, the size of the pixel opening is in inverse proportion to the reflectivity of the dimming unit in the pixel opening, and the pixel openings for accommodating the sub-pixels of the same color have the same size.
2. The display panel of claim 1, wherein the dimming cells of the sub-pixels of the same color have the same cross-sectional area in the thickness direction of the color conversion assembly, and the cross-sectional area of the dimming cell in the thickness direction is in inverse relationship with the reflectivity thereof.
3. The display panel according to claim 1, wherein each of the sub-pixels further includes a light source, the sub-pixels of different colors form a pixel unit, a ratio of a size of the pixel aperture to an area of the pixel unit is referred to as an aperture ratio, and the aperture ratio S satisfies a relationship:
S＝a/(b+mN)
wherein a is a target brightness, b is a brightness of the light source, m is an ambient light brightness, and N is a reflectivity of the dimming unit located in the pixel opening.
4. The display panel according to claim 3,
the plurality of sub-pixels comprise a first sub-pixel, a second sub-pixel and a third sub-pixel which are different in color;
the plurality of pixel openings comprise a first pixel opening for accommodating the first sub-pixel, a second pixel opening for accommodating the second sub-pixel and a third pixel opening for accommodating the third sub-pixel;
the area ratio of the first pixel opening to the second pixel opening to the third pixel opening is (0.812-1.012): (0.805-1.005): (0.797-0.997);
preferably, the area ratio of the first pixel opening, the second pixel opening and the third pixel opening is 0.912:0.905: 0.897;
preferably, the area of the first pixel opening is 17510um2The area of the second pixel opening is 17376um2The area of the third pixel opening is 17222um2。
5. The display panel according to claim 1, wherein each of the sub-pixels further comprises a light filtering unit, each of the light filtering units is respectively located on each of the light modulating units, and a refractive index of each of the light filtering units is smaller than a refractive index of the corresponding light modulating unit.
6. The display panel according to claim 5,
the refractive index of the light filtering unit is 1.2-1.5;
preferably, the thickness of the light filtering unit is 0.8-5 μm;
preferably, the thickness of the filter unit is 1 μm to 2 μm.
7. The display panel of claim 1, wherein the dimming cell comprises a quantum dot material and/or a light scattering material;
preferably, the light scattering material comprises titanium dioxide nanoparticles;
preferably, the thickness of the light adjusting unit is 5 to 15 μm;
preferably, the thickness of the light adjusting unit is 10 μm to 12 μm.
8. A display device, comprising: the display panel of any one of claims 1-7.
9. A control method of a display panel, the display panel including a light source and a color conversion component, the color conversion component including a light shielding layer and a plurality of sub-pixels, the light shielding layer including an isolation structure and a plurality of pixel openings surrounded by the isolation structure, each of the sub-pixels being respectively located in the pixel openings, each of the sub-pixels including a dimming unit, the control method comprising:
obtaining 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 light brightness and the target brightness.
10. The method of claim 9, wherein the step of adjusting the brightness of the light source according to the ambient light brightness and the target brightness is preceded by the step of:
obtaining the reflectivity of the dimming unit and the size of the pixel opening, and determining the brightness of reflected light according to the ambient light brightness, the reflectivity of the dimming unit and the size of the pixel opening;
in the step of adjusting the brightness of the light source according to the ambient light brightness and the target brightness: 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023216704A1 (en) * | 2022-05-12 | 2023-11-16 | 华为技术有限公司 | Micro light-emitting diode display screen and preparation method |
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