CN114744006A - Light-emitting panel and display device - Google Patents

Light-emitting panel and display device Download PDF

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Publication number
CN114744006A
CN114744006A CN202210311956.8A CN202210311956A CN114744006A CN 114744006 A CN114744006 A CN 114744006A CN 202210311956 A CN202210311956 A CN 202210311956A CN 114744006 A CN114744006 A CN 114744006A
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China
Prior art keywords
light emitting
target color
emitting element
color light
thickness
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Chinese (zh)
Inventor
梁志兴
钟彩娇
周婷
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • 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
    • H01L33/508—Wavelength conversion elements having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer, wavelength conversion layer with a concentration gradient of the wavelength conversion material
    • 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
    • H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

Abstract

The embodiment of the application provides a light-emitting panel and a display device, wherein the light-emitting panel comprises a substrate and Q target color light-emitting elements with the same color, which are positioned on the substrate, the wavelength range of light emitted by the Q target color light-emitting elements is divided into M wave bands, and Q and M are positive integers; the light-emitting panel comprises N subareas, wherein at least one target color light-emitting element is distributed in each subarea, N is larger than or equal to M, and both N and M are larger than or equal to 2; the wavelengths of the light emitted by the target color light emitting elements in at least M sections are respectively in M wave bands, each section corresponds to one wave band, and the wavelengths of the light emitted by the target color light emitting elements in the same section are in the same wave band. The embodiment of the application can improve and even eliminate the problems of uneven brightness and/or uneven chromaticity of the light-emitting panel.

Description

Light-emitting panel and display device
Technical Field
The application belongs to the technical field of show, especially relates to a luminescent panel and display device.
Background
With the development of display technology, the types of light emitting panels are becoming more and more widespread. For example, the types of light emitting panels may include a Light Emitting Diode (LED) light emitting panel, a sub millimeter light emitting diode (Mini LED) light emitting panel, a Micro LED light emitting panel, and the like.
The inventors of the present application have found that, for example, LED light-emitting panels, Mini LED light-emitting panels, and Micro LED light-emitting panels have problems of uneven brightness and/or uneven chromaticity when they emit light and display.
Disclosure of Invention
The embodiment of the application provides a light-emitting panel and a display device, which can solve or even eliminate the problem of uneven brightness and/or uneven chromaticity of the light-emitting panel.
In a first aspect, embodiments of the present application provide a light-emitting panel including a substrate and Q target color light-emitting elements of a same color on the substrate, a wavelength range of light emitted by the Q target color light-emitting elements being divided into M wavelength bands, Q and M being positive integers; the light-emitting panel comprises N subareas, wherein at least one target color light-emitting element is distributed in each subarea, N is more than or equal to M, and both N and M are more than or equal to 2; the wavelengths of the light emitted by the target color light emitting elements in at least M sections are respectively in M wave bands, each section corresponds to one wave band, and the wavelengths of the light emitted by the target color light emitting elements in the same section are in the same wave band.
In a second aspect, embodiments of the present application provide a display device including the light-emitting panel as provided in the first aspect.
The light-emitting panel and the display device comprise a substrate and Q target color light-emitting elements with the same color, wherein the wavelength range of light emitted by the Q target color light-emitting elements is divided into M wave bands, and Q and M are positive integers; the light-emitting panel comprises N subareas, wherein at least one target color light-emitting element is distributed in each subarea, and N is more than or equal to M; the wavelengths of the light emitted by the target color light emitting elements in at least the M divisions are in M bands, respectively, and the wavelengths of the light emitted by the target color light emitting elements in the same division are in the same band. Since the wavelengths of the light emitted by the light-emitting elements of the target colors in each subarea are in the same waveband, the brightness uniformity and the brightness uniformity of each subarea can be at least ensured, and the problems of uneven brightness and/or uneven chromaticity of the light-emitting panel can be improved or even eliminated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings may be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic top view of a light emitting panel;
FIG. 2 is a schematic top view of a light emitting panel provided by an embodiment of the present application;
FIG. 3 is another schematic top view of a light emitting panel provided by an embodiment of the present application;
fig. 4 is a schematic cross-sectional view of a light-emitting panel according to an embodiment of the present application;
fig. 5a is another schematic cross-sectional view of a light-emitting panel provided by an embodiment of the present application;
fig. 5b is a schematic cross-sectional view of a light-emitting panel provided by an embodiment of the present application;
fig. 6 is a schematic cross-sectional view of a color conversion unit in a light-emitting panel according to an embodiment of the present application;
fig. 7 is another schematic cross-sectional view of a color conversion unit in a light-emitting panel provided by an embodiment of the present application;
FIG. 8 is a schematic top view of a light emitting panel provided by an embodiment of the present application;
fig. 9 is a schematic structural diagram of a light-emitting panel provided in an embodiment of the present application;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application 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 intended to be illustrative only and are not intended to be limiting. It will be apparent to one skilled in the art that the present application 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 application by illustrating examples thereof.
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 additional identical elements in the process, method, article, or apparatus that comprises the element.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the embodiments of the present application, the term "electrically connected" may mean that two components are directly electrically connected, or may mean that two components are electrically connected to each other via one or more other components.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the corresponding claims (the claimed subject matter) and their equivalents. It should be noted that the embodiments provided in the embodiments of the present application can be combined with each other without contradiction.
Before explaining the technical solutions provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application first specifically explains the problems existing in the prior art:
as described above, the inventors of the present application have found that there is a problem of uneven brightness and/or uneven chromaticity of a light-emitting panel in the related art.
In order to solve the problems of luminance unevenness and/or chromaticity unevenness of the light-emitting panel, the inventors of the present application first conducted research and analysis on the root causes leading to the above technical problems, and the specific research and analysis processes are as follows:
the inventors of the present application have found that, as shown in fig. 1, for example, the light emitting panel 10 ' includes a plurality of light emitting elements 101 ' and the light emitting elements 101 ' may be, for example, LED chips for LED light emitting panels, Mini LED light emitting panels, and Micro LED light emitting panels. The wavelengths of light emitted from a plurality of light emitting elements 101 'of the same color in the light emitting panel 10' may be different, for example, across a plurality of wavelength bands, due to manufacturing process errors or different materials, different manufacturers, and the like. In the related art, when a plurality of light emitting elements 101 ' are transferred to the substrate 102 ' of the light emitting panel 10 ', the light emitting elements 101 ' of the same color and different wavelength bands are mixed together and then transferred to the substrate 102 ' of the light emitting panel 10 ', that is, the light emitting elements 101 ' of the same color and different wavelength bands are mixed together on the substrate 102 ' and arranged in disorder, generally regardless of the wavelength band in which the light emitting elements 101 ' are located. After a lot of experiments and field measurements, the inventors found that when light-emitting elements 101 'of different wavelength bands (of the same color) are mixed together, the light-emitting panel 10' emits light and displays light due to different wavelengths of light emitted by the light-emitting elements 101 'of different wavelength bands, and thus the luminance and/or chromaticity of different regions in the light-emitting panel 10' are different, that is, uneven luminance and/or uneven chromaticity are generated.
In view of the above research by the inventors, embodiments of the present application provide a light-emitting panel and a display device, which can solve the technical problems of uneven brightness and/or uneven chromaticity of the light-emitting panel in the related art.
The technical idea of the embodiment of the application is as follows: target color light emitting elements having wavelengths in M wavelength bands are respectively provided in at least M divisions of the light emitting panel, and the target color light emitting elements having wavelengths in the same wavelength band are provided in the same division. In this way, since the wavelengths of the light emitted by the light emitting elements of the target colors in each subarea are in the same wavelength band, the brightness uniformity and the chromaticity uniformity of each subarea can be at least ensured, and the problems of the brightness unevenness and/or the chromaticity unevenness of the light emitting panel can be improved or even eliminated.
First, a light-emitting panel provided in an embodiment of the present application will be described.
As shown in fig. 2, the light-emitting panel 20 according to the embodiment of the present application includes a substrate 201 and Q target color light-emitting elements 202 of the same color on the substrate 201, the wavelength range of light emitted from the Q target color light-emitting elements 202 is divided into M wavelength bands, and Q and M are positive integers. A wavelength band is also understood to be a range of wavelengths, and a smaller wavelength range is usually called a wavelength band, for example, one of the wavelength bands is 457.5nm to 459nm, where nm represents nanometers. For example, the wavelength range of the light emitted by the Q target color light emitting elements 202 is 457.5nm to 465nm, that is, the length of the wavelength range is 7.5 nm. Then, assuming that each 1.5nm is a wavelength band, the wavelength ranges of the light emitted from the Q target color light emitting elements 202 can be divided into 5 wavelength bands of 457.5nm to 459nm, 459nm to 460.5nm, 460.5nm to 462nm, 462nm to 463.5nm, and 463.5nm to 465nm, respectively.
It should be noted that the length of the wavelength band may be flexibly adjusted according to actual situations, for example, the length of the wavelength band may be 1.5nm, or may also be 1nm, 2nm, or other lengths, which is not limited in this embodiment of the application, but it is required to ensure that the light emitted by the target color light emitting elements 202 in the same wavelength band meets the requirements of uniform brightness and/or uniform chromaticity.
In the embodiment of the present application, the substrate 201 may be a rigid substrate or a flexible substrate. For example, the rigid substrate includes, but is not limited to, a glass substrate, a plastic substrate, a quartz substrate, or a sapphire substrate, and the flexible substrate includes, but is not limited to, a Polyimide (PI) material or a polyethylene terephthalate (PET) material, which is not limited in this application.
The target color light emitting elements 202 and hereinafter non-target color light emitting elements may specifically include LED chips. The LED chip includes, but is not limited to, a mini LED chip or a micro LED chip. The mini LED is also called a sub-millimeter light emitting diode, and means an LED with the grain size of about 100-1000 microns, when the mini LED is adopted to form the light emitting panel provided by the embodiment of the application, the yield is high, the light emitting panel has special-shaped cutting characteristics, and a backlight form with a high curved surface can be formed by matching the mini LED with a soft substrate, so that the light emitting panel has better color rendering property. The micro LED is generally an LED having a grain size of about 1 to 10 μm, has a self-luminous display characteristic, and has advantages of all solid state, long lifetime, high brightness, low power consumption, small volume, ultra-high resolution, applicability to extreme environments such as high temperature or radiation, capability of realizing a display screen with pixel particles of 0.05 mm or less, low power consumption, good material stability, and no image residue.
It should be noted that in some embodiments, the substrate 201 may be provided with only one color of target color light emitting elements 202, and no other color of non-target color light emitting elements. The target color light emitting element 202 may be a blue light emitting element, a red light emitting element, a green light emitting element, a white light emitting element, or another color light emitting element. Taking the target color light emitting elements 202 as blue light emitting elements as an example, in some embodiments, the substrate 201 may have only blue light emitting elements, and no other color non-target color light emitting elements (e.g., red light emitting elements and green light emitting elements) are provided.
However, in other embodiments, other colors of non-target color light emitting elements may be disposed on the substrate 201 in addition to the target color light emitting elements 202. That is, the substrate 201 includes both the target color light emitting elements 202 and the non-target color light emitting elements. Illustratively, the target color light emitting elements 202 may be blue light emitting elements, and the non-target color light emitting elements may be light emitting elements of other colors than the blue light emitting elements, such as red light emitting elements and green light emitting elements. Alternatively, the target color light emitting element 202 may be a red light emitting element, and the non-target color light emitting elements may be light emitting elements of other colors than the red light emitting element, such as a blue light emitting element and a green light emitting element. Still alternatively, the target color light emitting element 202 may be a green light emitting element, and the non-target color light emitting elements may be light emitting elements of other colors than the green light emitting element, such as a red light emitting element and a blue light emitting element. When the light emitting elements are provided in different wavelength band divisions, the wavelength of the non-target color light emitting element can be made constant, and only the wavelength of the target color light emitting element 202 can be made variable. In brief, when both the target color light emitting elements 202 and the non-target color light emitting elements are provided on the substrate 201, light emitted from the plurality of target color light emitting elements 202 may be in a plurality of wavelength bands, but light emitted from light emitting elements of the same color among the non-target color light emitting elements may be in the same wavelength band. When the light emitting elements are provided in the divided regions, only the target color light emitting elements 202 may be considered, which is advantageous for luminance uniformity adjustment and chromaticity uniformity adjustment.
Taking the example where the target color light-emitting element 202 is a blue light-emitting element and the non-target color light-emitting elements are a red light-emitting element and a green light-emitting element, when there are both blue light-emitting elements and red light-emitting elements on the substrate 201, the light emitted from the plurality of blue light-emitting elements may be in a plurality of wavelength bands, the light emitted from the plurality of red light-emitting elements on the substrate 201 may be in the same wavelength band, and the light emitted from the plurality of green light-emitting elements on the substrate 201 may be in the same wavelength band.
With continued reference to FIG. 2, the light emitting panel 20 includes N sections 20A, with each section 20A having at least one target color light emitting element 202 distributed therein, N ≧ M, and both N and M are greater than or equal to 2. It should be noted that, in order to better improve the problem of uniform brightness and uniform brightness of each partition 20A, two or more target color light emitting elements 202 may be distributed in each partition 20A. It is to be noted that, in the embodiment of the present application, the wavelengths of the light emitted by the target color light emitting elements 202 in at least M sections 20A are in M wavelength bands, one wavelength band corresponds to each section 20A, and the wavelengths of the light emitted by the target color light emitting elements 202 in the same section 20A are in the same wavelength band. That is, target color light emitting elements 202 having wavelengths in different wavelength bands are located in different sub-sections 20A, and the wavelengths of the target color light emitting elements 202 in the same sub-section 20A are in the same wavelength band. For example, in some embodiments, where the light-emitting panel 20 includes M sections 20A, the wavelength range of light emitted by the Q target color light-emitting elements 202 on the substrate 201 is divided into M wavelength bands. Then, the target color light emitting elements 202 having wavelengths in the M wavelength bands may be located in the M divisions 20A, respectively, such that the target color light emitting element 202 of the first wavelength band is located in the first division 20A, the target color light emitting element 202 of the second wavelength band is located in the second division 20A, and so on, the target color light emitting element 202 of the M-th wavelength band is located in the M-th division 20A. For example, in other embodiments where N > M, i.e., the number of divisions in the light-emitting panel 20 is greater than the number of wavelength bands into which the target color light-emitting elements 202 are divided, it may be the case that two or more divisions 20A use the same wavelength band of target color light-emitting elements 202, e.g., the target color light-emitting elements 202 of the first wavelength band may be located in both the first division 20A and the second division 20A.
In the luminescent panel 20 according to the embodiment of the present application, the light-emitting elements of the target colors having wavelengths in M wavelength bands are provided in at least M divisions of the luminescent panel, respectively, and the light-emitting elements of the target colors having wavelengths in the same wavelength band are provided in the same division. In this way, since the wavelengths of the light emitted by the light emitting elements of the target colors in each subarea are in the same wavelength band, the brightness uniformity and the brightness uniformity of each subarea can be at least ensured, and the problems of uneven brightness and/or uneven chromaticity of the light emitting panel can be improved or even eliminated.
In addition, compared with the scheme of the disordered arrangement of the target color light emitting elements in the related art, since the light emitting panel 20 of the embodiment of the present application is divided into a plurality of partitions, the compensation scheme according to the partition design, i.e., the luminance compensation and the chromaticity compensation, can be more easily implemented when the luminance compensation or the chromaticity compensation is subsequently performed, which is beneficial to implementing the regional luminance adjustment and/or the chromaticity adjustment.
Considering that the wavelengths of the light emitted from the target color light emitting elements 202 in the different sub-areas 20A are different, a difference in luminance may occur between the different sub-areas 20A. In view of this, the inventors of the present application studied the relationship between the wavelength and the luminance, and made a luminance compensation scheme for each segment 20A according to the wavelength of the target color light emitting element 202 in each segment 20A.
Specifically, the inventors of the present application have found that, when the target color light emitting elements 202 are blue light emitting elements or green light emitting elements and the driving currents of the target color light emitting elements 202 in the respective sub-areas are the same or similar, the luminance of the sub-area in which the target color light emitting elements 202 having a large wavelength band are located is relatively dark, and the luminance of the sub-area in which the target color light emitting elements 202 having a small wavelength band are located is relatively bright. In view of the above findings, the inventors of the present application considered that it is possible to increase the drive current of the target color light emitting elements 202 in the division areas where the target color light emitting elements 202 having a larger wavelength band are located and decrease the drive current of the target color light emitting elements 202 in the division areas where the target color light emitting elements 202 having a smaller wavelength band are located, to improve or even eliminate the luminance difference between the different division areas 20A.
According to some embodiments of the present application, the target color light emitting element 202 may alternatively be a green light emitting element or a blue light emitting element. In the N divisions 20A, the wavelength of light emitted from the light emitting element 202 of the target color in the p-th division is longer than the wavelength of light emitted from the light emitting element 202 of the target color in the q-th division, and p and q are positive integers. That is, the wavelength band in which the target color light emitting element 202 in the p-th division is located is large, and the wavelength band in which the target color light emitting element 202 in the q-th division is located is small. When the luminescent panel 20 emits light, the current value of the current flowing through the first electrode of the light-emitting element 202 of the target color in the p-th division is larger than the current value of the current flowing through the first electrode of the light-emitting element 202 of the target color in the q-th division; and/or, the emission phase duty cycle for the target color light emitting element 202 in the p-th partition is greater than the emission phase duty cycle for the target color light emitting element 202 in the q-th partition. Wherein the first electrode may be an anode of the target color light emitting element. That is, the driving current of the target color light emitting element 202 in the p-th division may be larger than the driving current of the target color light emitting element 202 in the q-th division, so that the luminance of the p-th division is close to or the same as the luminance of the q-th division. Of course, it is also possible to make the light emission phase duty ratio corresponding to the target color light emitting element 202 in the p-th division larger than the light emission phase duty ratio corresponding to the target color light emitting element 202 in the q-th division. The duty ratio of the light-emitting stage, namely the proportion of the light-emitting stage in one frame time, is in positive correlation with the brightness, and the larger the duty ratio of the light-emitting stage is, the larger the brightness is.
As such, when the target color light emitting element 202 is a green light emitting element or a blue light emitting element, since the driving current of the target color light emitting element 202 in the p-th partition with a larger wavelength band may be larger than the driving current of the target color light emitting element 202 in the q-th partition with a smaller wavelength band, and/or the duty ratio of the light emitting phase corresponding to the target color light emitting element 202 in the p-th partition is larger than the duty ratio of the light emitting phase corresponding to the target color light emitting element 202 in the q-th partition, the luminance of the p-th partition can be made close to or the same as the luminance of the q-th partition, and the luminance difference between different partitions 20A is improved or even eliminated.
In practical applications, the N segments 20A may further include an x-th segment, and the wavelength of light emitted from the target color light emitting element 202 in the p-th segment > the wavelength of light emitted from the target color light emitting element 202 in the x-th segment > the wavelength of light emitted from the target color light emitting element 202 in the q-th segment. That is, the x-th division can be understood as a division in which the target color light emitting element 202 of the center wavelength band is located. When the drive current is adjusted, the drive current of the target color light emitting element 202 in the xth division may be set to the first reference value, the drive current of the target color light emitting element 202 in the pth division may be increased based on the first reference value, and the drive current of the target color light emitting element 202 in the qth division may be decreased based on the first reference value. Similarly, when the light emission phase duty ratio is adjusted, the light emission phase duty ratio corresponding to the target color light emitting element 202 in the xth division may be set to the second reference value, the light emission phase duty ratio corresponding to the target color light emitting element 202 in the pth division may be increased based on the second reference value, and the light emission phase duty ratio corresponding to the target color light emitting element 202 in the qth division may be decreased based on the second reference value.
As shown in fig. 3, in some specific embodiments, optionally, the substrate 201 may further include a data signal line data and a first driving circuit 301. The first driving circuit 301 may also be referred to as a pixel driving circuit or a pixel circuit, and is used for driving the target color light emitting element 202 to emit light. Specifically, at least one first driving circuit 301 is distributed in each partition 20A, and the first driving circuit 301 is electrically connected to the data signal line data and at least one target color light emitting element 202 in the partition in which the first driving circuit 301 is located, and is configured to drive the target color light emitting element 202 to emit light;
also taking the example where the target color light emitting element 202 is a green light emitting element or a blue light emitting element, when the light emitting panel emits light, the data signal line data outputs a data signal to the first drive circuit 301, and the voltage value of the data signal input to the first drive circuit 301 to which the target color light emitting element 202 in the p-th division is connected is smaller than the voltage value of the data signal input to the first drive circuit 301 to which the target color light emitting element 202 in the q-th division is connected.
As shown in the following expression (1), the relationship between the voltage value of the data signal and the driving current may be:
Figure BDA0003568731960000091
wherein I denotes a drive current of the light emitting element of the target color, W denotes a channel width of the drive transistor in the first drive circuit, L denotes a channel length of the drive transistor in the first drive circuit, Cox denotes a gate capacitance, μ denotes mobility, VDDRepresenting the value of the forward supply voltage, VdataRepresenting the voltage value of the data signal.
As can be seen from expression (1), the voltage value V of the data signaldataHaving a negative correlation with the drive current I of the light-emitting element of the target color, i.e. VdataThe larger the drive current I is, the smaller the drive current I is. Therefore, by making the voltage value of the data signal input from the first drive circuit 301 to which the target color light emitting element 202 in the p-th division is connected smaller than the voltage value of the data signal input from the first drive circuit 301 to which the target color light emitting element 202 in the q-th division is connected, the drive current of the target color light emitting element 202 in the p-th division can be made larger than the drive current of the target color light emitting element 202 in the q-th division.
In this way, when the target color light emitting element 202 is a green light emitting element or a blue light emitting element, since the voltage value of the data signal input by the first driving circuit 301 connected to the target color light emitting element 202 in the p-th sub-area is smaller than the voltage value of the data signal input by the first driving circuit 301 connected to the target color light emitting element 202 in the q-th sub-area, the driving current of the target color light emitting element 202 in the p-th sub-area can be made larger than the driving current of the target color light emitting element 202 in the q-th sub-area, and the luminance of the p-th sub-area is made to be close to or equal to the luminance of the q-th sub-area, thereby improving or even eliminating the luminance difference between the different sub-areas 20A.
However, the inventors of the present application have found that, when the target color light-emitting element 202 is a red light-emitting element, the luminance change is just opposite to when the target color light-emitting element 202 is a green light-emitting element or a blue light-emitting element. Specifically, when the target color light emitting elements 202 are red light emitting elements and the driving currents of the target color light emitting elements 202 in the respective sub-sections are the same or similar, the luminance of the sub-section in which the target color light emitting elements 202 having a larger wavelength band are located is relatively brighter, and the luminance of the sub-section in which the target color light emitting elements 202 having a smaller wavelength band are located is relatively darker. In view of the above findings, the inventors of the present application considered that when the target color light emitting element 202 is a red light emitting element, the drive current of the target color light emitting element 202 in the division where the target color light emitting element 202 having a larger wavelength band is located can be reduced, and the drive current of the target color light emitting element 202 in the division where the target color light emitting element 202 having a smaller wavelength band is located can be increased to improve or even eliminate the luminance difference between the different divisions 20A.
Specifically, according to some embodiments of the present application, the target color light emitting element 202 may optionally be a red light emitting element. In the N divisions 20A, the wavelength of light emitted from the light emitting element 202 of the target color in the p-th division is longer than the wavelength of light emitted from the light emitting element 202 of the target color in the q-th division, and p and q are positive integers. That is, the wavelength band in which the target color light emitting element 202 in the p-th division is located is large, and the wavelength band in which the target color light emitting element 202 in the q-th division is located is small. The current value of the current flowing through the first electrode of the light emitting element 202 of the target color in the p-th division is smaller than the current value of the current flowing through the first electrode of the light emitting element 202 of the target color in the q-th division when the light emitting panel 20 emits light; and/or the duty cycle of the emission phase for the target color light emitting element 202 in the p-th partition is less than the duty cycle of the emission phase for the target color light emitting element 202 in the q-th partition. Wherein the first electrode may be an anode of the target color light emitting element. That is, the drive current of the target color light emitting element 202 in the p-th division may be smaller than the drive current of the target color light emitting element 202 in the q-th division, so that the luminance of the p-th division is close to or the same as the luminance of the q-th division. Of course, it is also possible to make the light emission phase duty ratio corresponding to the target color light emitting element 202 in the p-th division smaller than the light emission phase duty ratio corresponding to the target color light emitting element 202 in the q-th division, so that the luminance of the p-th division is close to or the same as the luminance of the q-th division.
As such, when the target color light emitting element 202 is a red light emitting element, since the driving current of the target color light emitting element 202 in the p-th partition with a larger wavelength band may be smaller than the driving current of the target color light emitting element 202 in the q-th partition with a smaller wavelength band, and/or the duty ratio of the light emitting phase corresponding to the target color light emitting element 202 in the p-th partition is smaller than the duty ratio of the light emitting phase corresponding to the target color light emitting element 202 in the q-th partition, the luminance of the p-th partition can be made close to or the same as the luminance of the q-th partition, and the luminance difference between different partitions 20A is improved or even eliminated.
In practical applications, the N number of segments 20A may further include an x-th segment, where the wavelength of light emitted from the light emitting element 202 of the target color in the p-th segment > the wavelength of light emitted from the light emitting element 202 of the target color in the x-th segment > the wavelength of light emitted from the light emitting element 202 of the target color in the q-th segment. That is, the x-th division can be understood as a division where the target color light emitting element 202 of the center wavelength band is located. When the drive current is adjusted, the drive current of the target color light emitting element 202 in the xth division may be set to the first reference value, the drive current of the target color light emitting element 202 in the pth division may be decreased based on the first reference value, and the drive current of the target color light emitting element 202 in the qth division may be increased based on the first reference value. Similarly, when the emission phase duty ratio is adjusted, the emission phase duty ratio corresponding to the light emitting element 202 of the target color in the xth division may be set as a second reference value, the emission phase duty ratio corresponding to the light emitting element 202 of the target color in the pth division may be decreased based on the second reference value, and the emission phase duty ratio corresponding to the light emitting element 202 of the target color in the qth division may be increased based on the second reference value.
Continuing to refer to fig. 3, taking the example where the target color light emitting element 202 is a red light emitting element, when the light emitting panel emits light, the data signal line data outputs a data signal to the first driving circuit 301, and the voltage value of the data signal input to the first driving circuit 301 to which the target color light emitting element 202 in the p-th division is connected may be larger than the voltage value of the data signal input to the first driving circuit 301 to which the target color light emitting element 202 in the q-th division is connected.
In this way, when the target color light emitting element 202 is a red light emitting element, since the voltage value of the data signal input by the first driving circuit 301 connected to the target color light emitting element 202 in the p-th sub-area is greater than the voltage value of the data signal input by the first driving circuit 301 connected to the target color light emitting element 202 in the q-th sub-area, the driving current of the target color light emitting element 202 in the p-th sub-area can be made smaller than the driving current of the target color light emitting element 202 in the q-th sub-area, and the luminance of the p-th sub-area is made close to or equal to the luminance of the q-th sub-area, thereby improving or even eliminating the luminance difference between the different sub-areas 20A.
Considering that the wavelengths of the light emitted from the target color light emitting elements 202 in the different sub-areas 20A are different, a chromaticity difference may occur between the different sub-areas 20A. In view of this, the inventors of the present application also studied the relationship between the wavelength and the chromaticity, and made a chromaticity compensation scheme for each segment 20A according to the wavelength of the target color light emitting element 202 in each segment 20A.
Specifically, as shown in fig. 4, according to some embodiments of the present application, the light emitting panel 20 may optionally further include a color conversion layer 401, and the color conversion layer 401 may include a red conversion unit 401a, a green conversion unit 401b, and a blue conversion unit 401 c. The color conversion layer 401 may be located on a side of the target color light emitting element 202 facing away from the substrate 201 in a direction Z perpendicular to the plane in which the light emitting panel 20 is located. It is easily understood that the red conversion unit 401a is for converting light emitted from the light emitting elements 202 of the object color into red, the green conversion unit 401b is for converting light emitted from the light emitting elements 202 of the object color into green, and the blue conversion unit 401c is for converting light emitted from the light emitting elements 202 of the object color into blue, so that the light emitting panel 20 can emit light of a plurality of colors.
With continued reference to fig. 4, in some specific embodiments, the color conversion layer 401 may be a phosphor layer or a quantum dot layer. It is easily understood that, when the color conversion layer 401 is a phosphor layer, the red conversion unit 401a contains red phosphor, the green conversion unit 401b contains green phosphor, and the blue conversion unit 401c contains blue phosphor. Light emitted from the target color light emitting element 202 emits red light by exciting the red phosphor in the red conversion unit 401a, light emitted from the target color light emitting element 202 emits green light by exciting the green phosphor in the green conversion unit 401b, and light emitted from the target color light emitting element 202 emits blue light by exciting the blue phosphor in the blue conversion unit 401 c.
It is easily understood that, when the color conversion layer 401 is a quantum dot layer, the quantum dot material in the quantum dot layer may be, for example, zinc sulfide (ZnS), zinc selenide (ZnSe), zinc telluride (ZnTe), cadmium selenide (CdSe), cadmium telluride (CdTe), cadmium sulfide (CdS), gallium nitride (GaN), indium nitride (InN), indium phosphide (InP), indium arsenide (InAs), lead sulfide (PbS), and/or lead selenide (PbSe). Light emitted by the target color light emitting element 202 is converted to light of a different color by exciting different materials and/or different sizes of quantum dots in the quantum dot layer.
As shown in fig. 5a, in some specific embodiments, the color conversion layer 401 may also be a color resist layer 501. Accordingly, the red conversion unit 401a may be a red color resistor, the green conversion unit 401b may be a green color resistor, and the blue conversion unit 401c may be a blue color resistor. When light emitted by the target color light emitting device 202 is incident on the red color resistor, the red color resistor only allows red light to pass through; when light emitted by the target color light emitting element 202 is incident on the green color resistor, the green color resistor only allows green light to transmit; when light emitted from the light emitting element 202 of the target color is incident on the blue color resistor, only blue light is allowed to pass through the blue color resistor, so that the light emitting panel 20 can emit light of a plurality of colors.
Note that in some embodiments, the light-emitting panel 20 may include both the color resistance layer 501 and one of the phosphor layer and the quantum dot layer. In a direction Z perpendicular to the plane of the light-emitting panel 20, a phosphor layer or quantum dot layer is located between the target color light-emitting element 202 and the color resistance layer 501. The light emitted from the target color light emitting element 202 is first mixed into white light by the phosphor layer or the quantum dot layer, and then filtered by the color resistance layer 501, so that the light emitting panel 20 can emit light of various colors to display a multicolor picture.
It is noted that the light-emitting panel 20 may alternatively be an active light-emitting panel, for example in the embodiment shown in fig. 5 a. When the light-emitting panel 20 is an active light-emitting panel, a liquid crystal layer may not be provided between the film layer where the target color light-emitting elements 202 are located and the color resist layer 501 in the direction Z perpendicular to the plane of the light-emitting panel 20, and the red color resist, the green color resist, and the blue color resist in the color resist layer 501 function, for example, to improve the color purity of light emitted from the target color light-emitting elements 202 and/or non-target color light-emitting elements.
In other embodiments, the light-emitting panel 20 may be used as a backlight source in a backlight module, and the light-emitting side of the backlight source is matched with the lcd panel. Specifically, as shown in fig. 5b, when the light emitting elements (including the target color light emitting elements 202 and/or the non-target color light emitting elements) in the light emitting panel 20 are used as a backlight, a liquid crystal layer may be further provided between the film layer where the target color light emitting elements 202 are located and the color resist layer 501 in the direction Z perpendicular to the plane of the light emitting panel 20. Illustratively, for example, when only a blue light emitting element or a white light emitting element is used as a backlight in the light emitting panel 20, then a liquid crystal layer may be further provided between the film layer where the target color light emitting element 202 is located and the color resistance layer 501 in the direction Z perpendicular to the plane of the light emitting panel 20.
In order to improve or even eliminate the chromaticity difference between the different partitions 20A, according to some embodiments of the present application, optionally, in the N partitions 20A, the wavelength of light emitted by the target color light emitting element 202 in the p-th partition is greater than the wavelength of light emitted by the target color light emitting element in the q-th partition, the wavelength of light emitted by the target color light emitting element in the q-th partition is greater than the wavelength of light emitted by the target color light emitting element in the k-th partition, and p, q, and k are all positive integers. That is, the q-th division (same as the x-th division described above) can be understood as a division in which the target color light emitting element 202 of the center wavelength band is located.
Note that the thicknesses of at least two color conversion units among the red conversion unit 401a, the green conversion unit 401b, and the blue conversion unit 401c in the p-th division where the wavelength band is large may be different. For example, the thickness of the red conversion unit 401a is different from that of the blue conversion unit 401 c. For another example, the thickness of the red conversion unit 401a, the thickness of the green conversion unit 401b, and the thickness of the blue conversion unit 401c are all different. It is readily understood that the thickness can be understood as the smallest distance in a direction Z perpendicular to the plane of the light-emitting panel, or the vertical distance. Similarly, the thicknesses of at least two color conversion units among the red conversion unit 401a, the green conversion unit 401b, and the blue conversion unit 401c in the kth division whose wavelength band is smaller may also be different.
In this way, by adjusting the thicknesses of at least two color conversion units of the red conversion unit 401a, the green conversion unit 401b, and the blue conversion unit 401c in the p-th partition with a larger wavelength band and/or the k-th partition with a smaller wavelength band, the chromaticity of the p-th partition and/or the k-th partition can be adjusted from the original color cast to white balance or close to white balance, thereby improving or even eliminating the chromaticity difference between different partitions 20A.
It should be noted that, the thicknesses of at least two color conversion units of the red conversion unit 401a, the green conversion unit 401b, and the blue conversion unit 401c in the q-th partition of the central wavelength band may be the same or different, and may be flexibly adjusted according to the actual situation, which is not limited in this embodiment of the present application. For example, in some specific examples, the thicknesses of the red, green, and blue conversion units 401a, 401b, and 401c in the q-th division may be the same, and only the thicknesses of the color conversion units in the other divisions except for the center wavelength band are adjusted. Furthermore, it should be noted that, although only 3 partitions, such as the p-th partition, the q-th partition, and the k-th partition, are listed above, the light-emitting panel 20 may include more than 3 partitions, and the listing of the 3 partitions, such as the p-th partition, the q-th partition, and the k-th partition, is only used to illustrate the variation law of the thickness and the wavelength of the color conversion unit.
As a result of further study by the inventors of the present application, it has been found that, when the target color light emitting element 202 is a red light emitting element or a blue light emitting element, the chromaticity of the region in which the target color light emitting element 202 having a large wavelength band is located is blue, and the chromaticity of the region in which the target color light emitting element 202 having a small wavelength band is located is yellow. In view of the above findings, the inventors of the present application considered that, in the case where the target color light emitting element 202 is a red light emitting element or a blue light emitting element, the thickness of the blue conversion unit 401c in the partition where the target color light emitting element 202 having a larger wavelength band is located can be reduced to reduce the bluing degree; the thickness of the red conversion unit 401a and/or the green conversion unit 401b in the partition where the light emitting element 202 of the target color having a smaller wavelength band is located may be reduced to reduce the degree of yellowing.
Specifically, according to some embodiments of the present application, the target color light emitting element 202 may be a red light emitting element or a blue light emitting element, optionally, as shown in fig. 6, the thickness of the color conversion unit in the partition satisfies:
in the p-th partition, the thickness of the green conversion unit 401b is equal to or greater than the thickness of the red conversion unit 401a > the thickness of the blue conversion unit 401 c;
in the q-th partition, the thickness of the green conversion unit 401b is equal to the thickness of the red conversion unit 401a is equal to the thickness of the blue conversion unit 401 c;
in the kth partition, the thickness of the green conversion unit 401b is not more than the thickness of the red conversion unit 401a < the thickness of the blue conversion unit 401 c.
Table 1 schematically shows the thicknesses of the color conversion units in the divisions when the target color light-emitting element 202 is a red light-emitting element. Table 2 schematically shows the thicknesses of the color conversion units in the divisions when the target color light-emitting element 202 is a blue light-emitting element. As shown in tables 1 and 2, in practical applications, for example, the thickness of the blue conversion unit 401c, the thickness of the red conversion unit 401a, and the thickness of the green conversion unit 401b, and the thickness of the red conversion unit 401a in the p-th partition may be reduced, the thickness of the red conversion unit 401a, and the thickness of the green conversion unit 401b in the p-th partition may be unchanged, and the thickness of the blue conversion unit 401c, the thickness of the green conversion unit 401b, and the thickness of the red conversion unit 401a in the k-th partition may be reduced, based on the thickness of the red conversion unit 401a, the thickness of the green conversion unit 401b, and the thickness of the red conversion unit 401a in the q-th partition.
TABLE 1 thickness of color conversion units in a segment for a red light-emitting element
Figure BDA0003568731960000161
TABLE 2 thickness of color conversion units in bins for blue light emitting elements
Figure BDA0003568731960000162
In this way, when the target color light emitting element 202 is a red light emitting element or a blue light emitting element, the chromaticity of the p-th partition can be adjusted from the original bluish color to white balance or close to white balance by adjusting the thicknesses of at least two color conversion units among the red conversion unit 401a, the green conversion unit 401b, and the blue conversion unit 401c in the p-th partition having a larger wavelength band and the k-th partition having a smaller wavelength band, and the chromaticity of the k-th partition can be adjusted from the original yellowish color to white balance or close to white balance, thereby improving or even eliminating the chromaticity difference between the different partitions 20A.
In some specific examples, optionally, when the target color light emitting element 202 is a red light emitting element or a blue light emitting element, the thickness of the red conversion unit in the p-th partition may be equal to the thickness of the red conversion unit in the q-th partition, and/or the thickness of the blue conversion unit in the k-th partition may be equal to the thickness of the blue conversion unit in the q-th partition. That is, the thickness of the red conversion unit in the qth partition may be used as a first reference, so that the thickness of the red conversion unit in the pth partition is the same as the first reference, that is, the thickness of the red conversion unit in the qth partition. Similarly, the thickness of the blue conversion unit in the q-th partition may be taken as a second reference, so that the thickness of the blue conversion unit in the k-th partition is the same as the second reference, i.e., the same as the thickness of the blue conversion unit in the q-th partition.
In this way, the chromaticity adjustment of the p-th partition and the k-th partition can be realized only by adjusting the thicknesses of the green conversion unit 401b and/or the blue conversion unit 401c in the p-th partition and adjusting the thicknesses of the red conversion unit 401a and the green conversion unit 401b in the k-th partition, which is beneficial to the simplification of the production process.
As a result of further study by the inventors of the present application, it was found that when the target color light-emitting element 202 is a green light-emitting element, the chromaticity variation is different from that when the target color light-emitting element 202 is a red light-emitting element or a blue light-emitting element. Specifically, when the target color light emitting element 202 is a green light emitting element, the chromaticity of the region in which the target color light emitting element 202 having a large wavelength band is located is yellowish, and the chromaticity of the region in which the target color light emitting element 202 having a small wavelength band is located is bluish. In view of the above findings, the inventors of the present application considered that in the case where the target color light emitting element 202 is a green light emitting element, the thickness of the red conversion unit 401a and/or the green conversion unit 401b in the division where the target color light emitting element 202 having a larger wavelength band is located can be reduced to reduce the degree of yellowing; the thickness of the blue conversion unit 401c in the division region where the target color light emitting element 202 having a smaller wavelength band is located can be reduced to reduce the degree of bluing.
Specifically, according to some embodiments of the present application, optionally, the target color light emitting element 202 may be a green light emitting element, as shown in fig. 7, and the thickness of the color conversion unit in the partition satisfies:
in the p-th partition, the thickness of the green conversion unit 401b is equal to the thickness of the red conversion unit 401a < the thickness of the blue conversion unit 401 c;
in the q-th partition, the thickness of the green conversion unit 401b is equal to the thickness of the red conversion unit 401a is equal to the thickness of the blue conversion unit 401 c;
in the k-th partition, the thickness of the green conversion unit 401b > the thickness of the red conversion unit 401a > the thickness of the blue conversion unit 401 c.
Table 3 schematically shows the thickness of the color conversion unit in the division area when the target color light emitting element 202 is a green light emitting element. As shown in table 3, in practical application, for example, the thickness of the blue conversion unit 401c, the thickness of the red conversion unit 401a, and the thickness of the green conversion unit 401b in the kth partition may be reduced, the thickness of the red conversion unit 401a, and the thickness of the green conversion unit 401b in the kth partition may be unchanged, and the thickness of the blue conversion unit 401c, the thickness of the green conversion unit 401b, and the thickness of the red conversion unit 401a in the pth partition may be reduced, based on the thickness of the red conversion unit 401a, the thickness of the green conversion unit 401b, and the thickness of the red conversion unit 401a in the qth partition.
TABLE 3 thickness of color conversion units in the division zones for green light emitting elements
Figure BDA0003568731960000181
In this way, when the target color light emitting element 202 is a green light emitting element, the chromaticity of the p-th partition can be adjusted from the original yellow bias to the white balance or close to the white balance by adjusting the thicknesses of at least two color conversion units of the red conversion unit 401a, the green conversion unit 401b, and the blue conversion unit 401c in the p-th partition having a larger wavelength band and the k-th partition having a smaller wavelength band, and the chromaticity of the k-th partition can be adjusted from the original blue bias to the white balance or close to the white balance, thereby improving or even eliminating the chromaticity difference between the different partitions 20A.
In some specific examples, optionally, when the target color light emitting element 202 is a green light emitting element, the thickness of the red conversion unit in the k-th partition may be equal to the thickness of the red conversion unit in the q-th partition, and/or the thickness of the blue conversion unit in the p-th partition may be equal to the thickness of the blue conversion unit in the q-th partition. That is, the thickness of the red conversion unit in the q-th partition may be taken as a first reference, so that the thickness of the red conversion unit in the k-th partition is the same as the first reference, that is, the thickness of the red conversion unit in the q-th partition. The thickness of the blue color conversion unit in the qth partition may be taken as a second reference, so that the thickness of the blue color conversion unit in the pth partition is the same as the second reference, that is, the same as the thickness of the blue color conversion unit in the qth partition.
In this way, the chromaticity of the p-th partition and the k-th partition can be adjusted by adjusting the thicknesses of the green conversion unit 401b and/or the blue conversion unit 401c in the k-th partition and adjusting the thicknesses of the red conversion unit 401a and the green conversion unit 401b in the p-th partition, which is beneficial to simplifying the production process.
As shown in fig. 8, according to some embodiments of the present application, optionally, the substrate 201 may be provided with bonding sites P, and the leads of the target color light emitting elements 202 may be electrically connected to the bonding sites P, and each partition 20A includes at least one bonding site P therein. The shapes of the bonding sites in the divided regions 20A corresponding to different wavelength bands are different in a direction perpendicular to the plane of the light-emitting panel, and/or the shapes of the leads of the target color light-emitting elements 202 corresponding to different wavelength bands are different. For example, the bonding point in the sub-area 20A corresponding to the first band is circular, the bonding point in the sub-area 20A corresponding to the second band is rectangular, the bonding point in the sub-area 20A corresponding to the third band is triangular, and so on. Similarly, for example, the shape of the lead of the target color light emitting element 202 corresponding to the first wavelength band is circular, the shape of the lead of the target color light emitting element 202 corresponding to the second wavelength band is rectangular, and the shape of the lead of the target color light emitting element 202 corresponding to the third wavelength band is triangular. It should be noted that the shape of the bonding point and the shape of the lead may be any shape, such as a circle or any polygon, which is not limited in this application.
In this way, since the shapes of the bonding points in the sub-areas 20A corresponding to different wavelength bands are different, and/or the shapes of the leads of the target color light emitting elements 202 corresponding to different wavelength bands are different, it is possible to quickly distinguish which wavelength band of the target color light emitting element 202 should be bonded to each sub-area, to which sub-area each target color light emitting element 202 should be bonded, according to the shapes of the bonding points and the shapes of the leads, so that it is possible to quickly bond the target color light emitting element 202 and the substrate 201, and errors in bonding are avoided.
With continued reference to fig. 8, in some specific embodiments, optionally, in a direction perpendicular to a plane where the light-emitting panel is located, the shape of the bonding point in the partition corresponding to the ith wavelength band may be the same as the shape of the lead of the target color light-emitting element corresponding to the ith wavelength band, and i is a positive integer. That is, the shape of the bonding point in the segment corresponding to the same wavelength band and the shape of the lead of the corresponding target color light emitting element may be the same.
In this way, since the leads of the target color light emitting elements and the bonding points have the same shape, when the target color light emitting elements are bonded, even if the target color light emitting elements of M wavelength bands are mixed together, each target color light emitting element can be matched with the bonding point of the same shape based on the shape of the lead thereof, that is, mounted in the corresponding partition, thereby realizing automatic partition assembly of the target color light emitting elements, greatly reducing the bonding difficulty and the time required for bonding, and further reducing the production cost.
As shown in fig. 9, the light emitting panel 20 may optionally be a tiled screen according to some embodiments of the present application. The light emitting panel 20 may be formed by splicing N splice units 900, and each splice unit 900 may include one section 20A.
In this way, since the wavelengths of the light emitted by the target color light emitting elements in each of the splicing units 900 are in the same wavelength band, it is at least ensured that the brightness of each of the splicing units 900 is uniform and the brightness is uniform, and further the problem of uneven brightness and/or uneven chromaticity of the spliced screen is improved or even eliminated.
In some embodiments described above, the luminance difference and the chromaticity difference between different partitions (different stitching units 900) can also be improved or even eliminated, so that the problems of uneven luminance and/or uneven chromaticity of the stitched screen can be further improved or even eliminated.
Based on the display panel provided by the above embodiment, correspondingly, the application further provides a display device. As shown in fig. 10, the display device 1000 may include the apparatus body 10 and the light-emitting panel 20 in the above-described embodiment, the light-emitting panel 20 being overlaid on the apparatus body 10. The apparatus body 10 may be provided with various devices, such as a sensing device, a processing device, and the like, and is not limited thereto. The display device 1000 may be a device having a display function, such as a mobile phone, a computer, a tablet computer, a digital camera, a television, and electronic paper, and is not limited herein.
As shown in fig. 11, in some embodiments, the light emitting panel 20 may be a backlight panel, and the display device 1000 may further include a display panel 30 located on a light emitting surface (e.g., surface a in fig. 11) side of the backlight panel.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. For the display panel embodiment and the display device embodiment, the related matters can be referred to the description parts of the pixel driving circuit embodiment and the array substrate embodiment. The present application is not limited to the particular structures described above and shown in the figures. Those skilled in the art may make various changes, modifications and additions after comprehending the spirit of the present application. Also, a detailed description of known techniques is omitted herein for the sake of brevity.
It will be appreciated by persons skilled in the art that the above embodiments are illustrative and not restrictive. Different features which are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art upon studying the drawings, the specification, and the claims. In the claims, the term "comprising" does not exclude other structures; the quantities relate to "a" and "an" but do not exclude a plurality; the terms "first", "second" are used to denote a name and not to denote any particular order. Any reference signs in the claims shall not be construed as limiting the scope. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Claims (14)

1. A light-emitting panel characterized by comprising a substrate and Q target color light-emitting elements of the same color provided on the substrate, the wavelength range of light emitted from the Q target color light-emitting elements being divided into M wavelength bands, Q and M being positive integers;
the light-emitting panel comprises N subareas, at least one target color light-emitting element is distributed in each subarea, N is larger than or equal to M, and both N and M are larger than or equal to 2; the wavelengths of the light emitted by the target color light-emitting elements in at least M of the subareas are respectively in M of the wave bands, each subarea corresponds to one of the wave bands, and the wavelengths of the light emitted by the target color light-emitting elements in the same subarea are in the same wave band.
2. The luminescent panel according to claim 1, wherein the target color light emitting element is a green light emitting element or a blue light emitting element;
of the N said divisions, the wavelength of light emitted from said target color light emitting element in the p-th division is longer than the wavelength of light emitted from said target color light emitting element in the q-th division, p and q being positive integers;
when the light emitting panel emits light, a current value of a current flowing through the first electrode of the target color light emitting element in a p-th division is larger than a current value of a current flowing through the first electrode of the target color light emitting element in a q-th division; and/or the presence of a gas in the gas,
the emission phase duty cycle corresponding to the target color light emitting element in the p-th partition is greater than the emission phase duty cycle corresponding to the target color light emitting element in the q-th partition.
3. The light-emitting panel according to claim 2, wherein the substrate further comprises a data signal line and a first drive circuit, at least one first drive circuit is distributed in the partition, and the first drive circuit is electrically connected to the data signal line and at least one of the target color light-emitting elements in the partition in which the first drive circuit is located, for driving the target color light-emitting elements to emit light;
when the light emitting panel emits light, the data signal line outputs a data signal to the first drive circuit, and a voltage value of a data signal input to the first drive circuit to which the target color light emitting element in a p-th division is connected is smaller than a voltage value of a data signal input to the first drive circuit to which the target color light emitting element in a q-th division is connected.
4. The luminescent panel according to claim 1, wherein the target color light emitting element is a red light emitting element;
of the N said sections, the wavelength of the light emitted by the target color light emitting element in the p-th section is longer than the wavelength of the light emitted by the target color light emitting element in the q-th section, p and q being positive integers;
a current value of a current flowing through the first electrode of the target color light emitting element in a p-th divided region is smaller than a current value of a current flowing through the first electrode of the target color light emitting element in a q-th divided region when the light emitting panel emits light; and/or the presence of a gas in the gas,
the duty ratio of the emission phase corresponding to the target color light emitting element in the p-th division is smaller than the duty ratio of the emission phase corresponding to the target color light emitting element in the q-th division.
5. The light-emitting panel according to claim 4, wherein the substrate further comprises a data signal line and a first driving circuit, at least one first driving circuit is distributed in each of the partitions, and the first driving circuit is electrically connected to the data signal line and at least one of the target color light-emitting elements in the partition in which the first driving circuit is located, for driving the target color light-emitting elements to emit light;
when the light emitting panel emits light, the data signal line outputs a data signal to the first drive circuit, and a voltage value of a data signal input to the first drive circuit to which the target color light emitting element in a p-th division is connected is larger than a voltage value of a data signal input to the first drive circuit to which the target color light emitting element in a q-th division is connected.
6. The luminescent panel according to claim 1, wherein the luminescent panel further comprises a color conversion layer including a red conversion unit, a green conversion unit, and a blue conversion unit;
the color conversion layer is positioned on one side of the target color light-emitting element, which is far away from the substrate, in the direction vertical to the plane of the light-emitting panel;
of the N said sections, the wavelength of light emitted by the target color light emitting element in the p-th section is longer than that of light emitted by the target color light emitting element in the q-th section, the wavelength of light emitted by the target color light emitting element in the q-th section is longer than that of light emitted by the target color light emitting element in the k-th section, and p, q, and k are positive integers;
the thicknesses of at least two color conversion units in the red conversion unit, the green conversion unit and the blue conversion unit in the p-th partition and/or the k-th partition are different, and the thickness is the minimum distance along the direction perpendicular to the plane where the light-emitting panel is located.
7. The luminescent panel according to claim 6, wherein the target color light emitting element is a red light emitting element or a blue light emitting element, and the thickness of the color conversion unit in the partitioning section satisfies:
in the p-th partition, the thickness of the green conversion unit is greater than or equal to the thickness of the red conversion unit and greater than the thickness of the blue conversion unit;
in the q-th partition, the thickness of the green converting unit is the thickness of the red converting unit is the thickness of the blue converting unit;
in the kth partition, the thickness of the green conversion unit is not more than the thickness of the red conversion unit < the thickness of the blue conversion unit.
8. The luminescent panel according to claim 7, wherein the thickness of the red converting unit in the p-th partition is equal to the thickness of the red converting unit in the q-th partition, and/or the thickness of the blue converting unit in the k-th partition is equal to the thickness of the blue converting unit in the q-th partition.
9. The luminescent panel according to claim 6, wherein the target color light emitting element is a green light emitting element, and the thickness of the color conversion unit in the divided region satisfies:
in the p-th partition, the thickness of the green conversion unit is less than the thickness of the blue conversion unit;
in the q-th partition, the thickness of the green converting unit is the thickness of the red converting unit is the thickness of the blue converting unit;
in the k-th partition, the thickness of the green conversion unit > the thickness of the red conversion unit > the thickness of the blue conversion unit.
10. The luminescent panel according to claim 9, wherein the thickness of the red converting unit in the k-th partition is equal to the thickness of the red converting unit in the q-th partition, and/or the thickness of the blue converting unit in the p-th partition is equal to the thickness of the blue converting unit in the q-th partition.
11. The light-emitting panel according to claim 1, wherein a bonding point is provided on the substrate, and a lead of the light-emitting element of the target color is electrically connected to the bonding point, and at least one of the bonding points is included in the partition;
in a direction perpendicular to a plane of the light-emitting panel, shapes of the bonding points in the partitions corresponding to different wavelength bands are different, and/or shapes of leads of the target color light-emitting elements corresponding to different wavelength bands are different.
12. The luminescent panel according to claim 11,
in the direction perpendicular to the plane where the light-emitting panel is located, the shape of the bonding point in the partition corresponding to the ith wave band is the same as the shape of the pin of the target color light-emitting element corresponding to the ith wave band, and i is a positive integer.
13. The light-emitting panel according to claim 1, wherein the light-emitting panel is formed by splicing N splice units, and the splice unit includes one of the subareas.
14. A display device characterized by comprising the light-emitting panel according to any one of claims 1 to 13.
CN202210311956.8A 2022-03-28 2022-03-28 Light-emitting panel and display device Pending CN114744006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210311956.8A CN114744006A (en) 2022-03-28 2022-03-28 Light-emitting panel and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210311956.8A CN114744006A (en) 2022-03-28 2022-03-28 Light-emitting panel and display device

Publications (1)

Publication Number Publication Date
CN114744006A true CN114744006A (en) 2022-07-12

Family

ID=82277509

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210311956.8A Pending CN114744006A (en) 2022-03-28 2022-03-28 Light-emitting panel and display device

Country Status (1)

Country Link
CN (1) CN114744006A (en)

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