Display panel and display device

Abstract

This disclosure provides a display panel and display device, relating to the field of display technology, for improving the display effect of the display panel. The display panel includes a driving backplane, a light-emitting chip layer, a color conversion layer, and a color filter layer. The light-emitting chip layer includes a plurality of light-emitting chips disposed on one side of the driving backplane; the color conversion layer is disposed on the side of the plurality of light-emitting chips away from the driving backplane, and includes a plurality of color conversion portions, each color conversion portion corresponding to one light-emitting chip, with a first gap between adjacent color conversion portions; the color filter layer is disposed on the side of the light-emitting chip layer away from the driving backplane, and includes a plurality of filter units, each filter unit corresponding to one color conversion portion, each filter unit including a portion extending into the first gap, and the portion of each filter unit extending into the first gap is disposed circumferentially along the sidewall of the corresponding color conversion portion.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] Currently, display panels, such as Mini LED (Mini Light-Emitting Diode) display panels and Micro LED (Micro Light-Emitting Diode) display panels, have advantages such as high brightness, clear display images, and low power consumption, and are increasingly widely used in various display devices such as mobile phones, tablets, computers, and televisions. Utility Model Content

[0003] The purpose of the embodiments disclosed herein is to provide a display panel and a display device for improving the display effect of the display panel.

[0004] To achieve the above objectives, the embodiments of this disclosure provide the following technical solutions:

[0005] On one hand, a display panel is provided. The display panel includes a driving backplane, a light-emitting chip layer, a color conversion layer, and a color filter layer. The light-emitting chip layer includes a plurality of light-emitting chips and is disposed on one side of the driving backplane; the color conversion layer is disposed on the side of the plurality of light-emitting chips away from the driving backplane, and includes a plurality of color conversion portions, each color conversion portion corresponding to one light-emitting chip, with a first interval between two adjacent color conversion portions; the color filter layer is disposed on the side of the light-emitting chip layer away from the driving backplane, and includes a plurality of filter units, each of the plurality of filter units correspondingly covering one color conversion portion, each filter unit including a portion extending into the first interval, and the portion of each filter unit extending into the first interval is disposed circumferentially along the sidewall of the corresponding color conversion portion.

[0006] In the embodiments of this application, the positions of the color conversion layer and the color filter layer are arranged such that the portion of each filter unit extending to the first interval is arranged circumferentially along the sidewall of the corresponding color conversion part. This not only solves the color mixing problem but also ensures the aperture ratio of the display panel, thereby improving the display effect.

[0007] In some embodiments, the plurality of filter units include a first filter unit and a second filter unit disposed adjacent to each other, the first filter unit being configured to transmit a first color light and the second filter unit being configured to transmit a second color light; wherein the first filter unit and the second filter unit overlap in the thickness direction of the display panel, and the orthographic projection of the overlapping portion on the driving back plate is located within the orthographic projection range of the first interval on the driving back plate.

[0008] In some embodiments, the end of the first filter unit near the second filter unit is a first part, the first part extends within the first interval, and the side of the second filter unit near the first filter unit is a second part, the second part overlaps the side of the first part away from the drive backplate.

[0009] In some embodiments, the first filter unit is configured to transmit red or green light.

[0010] In some embodiments, a portion of the first filter unit and a portion of the second filter unit are disposed at the first interval position, and the portion of the first filter unit and the portion of the second filter unit are in contact with each other.

[0011] In some embodiments, the first filter unit is configured to transmit one of red light, green light, and blue light.

[0012] In some embodiments, the first filter unit is a red filter unit, and the color conversion portion corresponding to the first filter unit has two first intervals on both sides, and a portion of the first filter unit is disposed in each of the two first intervals.

[0013] In some embodiments, a barrier layer is further included, which is disposed between the light-emitting chip layer and the color conversion layer. The barrier layer has a plurality of first openings, a portion of the color conversion portion is located within the first opening, and a barrier structure is formed between two adjacent first openings. Each barrier structure is located within a first interval, and the barrier structure is closer to the driving backplate than the first filter unit.

[0014] In some embodiments, an encapsulation layer is further included, the encapsulation layer being located between the color conversion layer and the color filter layer, the encapsulation layer forming a groove at the first interval, and the portion of the filter unit extending to the first interval being located within the groove.

[0015] In some embodiments, the color conversion section includes a first sub-section and a second sub-section connected to each other, wherein the first sub-section is located within the first opening, and the two ends of the second sub-section in the row direction cover at least a portion of the surface of the retaining wall structure away from the drive back plate; the two opposing sidewalls of the groove respectively cover the sidewalls of the second sub-sections of the two adjacent color conversion sections.

[0016] In some embodiments, the size of the groove gradually decreases in the row direction along a direction away from the drive backplate.

[0017] In some embodiments, a portion of the first filter unit is disposed within the groove, or a portion of the first filter unit and a portion of the second filter unit are disposed within the groove.

[0018] In some embodiments, the color conversion section includes a first color conversion section and a second color conversion section. The first color conversion section corresponds to the position of the first filter unit, and the second color conversion section corresponds to the position of the second filter unit. The maximum dimension of the first filter unit located in the groove between the first color conversion section and the second color conversion section in the row direction is the distance between the bottom of the groove near the boundary of the first color conversion section and the boundary of the second color conversion section away from the drive back plate and near the boundary of the groove, and this distance is 5 μm.

[0019] In some embodiments, the surface of the color conversion layer away from the drive backplate is a first surface, and the minimum dimension of the first filter unit located in the groove between the first color conversion portion and the second color conversion portion in the row direction is the distance between the two boundaries where the first filter unit intersects with the first surface, and this distance is 1.5 μm.

[0020] In some embodiments, a reflective layer is further included, which is disposed between the barrier layer and the color conversion layer. The reflective layer includes a plurality of reflective portions, which are disposed between a first sub-part of the color conversion portion and the sidewall of the barrier structure, and the reflective portions and the groove do not overlap in the orthographic projection of the drive back plate.

[0021] On the other hand, a display device is provided, comprising: a display panel and a driver chip as described in any of the above embodiments, wherein the driver chip is connected to the display panel.

[0022] The above-described display device has the same structure and beneficial technical effects as the display panel provided in some of the above embodiments, and will not be described again here. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0024] Figure 1 A cross-sectional structural diagram of a display panel provided for some embodiments in the related art;

[0025] Figure 2 Another cross-sectional structural diagram of a display panel provided for some embodiments of related technologies;

[0026] Figure 3A This is a cross-sectional structural diagram of a display panel provided according to some embodiments of the present disclosure;

[0027] Figure 3B This is another cross-sectional view of a display panel provided according to some embodiments of the present disclosure;

[0028] Figure 3C For the display panel provided according to some embodiments of the present disclosure Figure 3A A magnified view of the local structure;

[0029] Figure 4 This is a plan view of a display panel provided according to some embodiments of the present disclosure;

[0030] Figure 5 This is another cross-sectional view of a display panel provided according to some embodiments of the present disclosure;

[0031] Figure 6 This is a light emission path diagram of a light-emitting chip provided according to some embodiments of the present disclosure;

[0032] Figure 7A A spectrum provided according to some embodiments of the present disclosure;

[0033] Figure 7B This is another spectrum provided according to some embodiments of the present disclosure;

[0034] Figure 7C This is yet another spectrum provided according to some embodiments of the present disclosure;

[0035] Figure 7D This is yet another spectrum provided according to some embodiments of the present disclosure;

[0036] Figure 7E This is yet another spectrum provided according to some embodiments of the present disclosure;

[0037] Figure 8 This is yet another spectrum provided according to some embodiments of the present disclosure;

[0038] Figures 9A-9C This is a process diagram illustrating the fabrication steps of a display panel according to some embodiments of the present disclosure. Detailed Implementation

[0039] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0040] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0041] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0042] In describing some embodiments, the terms "coupled" and "connected," and their derivative expressions, may be used. The term "connected" should be interpreted broadly; for example, a "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection via an intermediate medium. The term "coupled," for example, indicates that two or more components have direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0043] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0044] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0045] As used herein, depending on the context, the term “if” may optionally be interpreted as meaning “when…” or “in the event of…” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrase “if determination…” or “if detection [the stated condition or event]” may optionally be interpreted as meaning “in the event of determination…” or “in response to determination…” or “in response to detection [the stated condition or event]” or “in response to detection [the stated condition or event].”

[0046] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.

[0047] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0048] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0049] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0050] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0051] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0052] With the development of MLED display technology, its high brightness and splicing characteristics have been widely used. As product size decreases, the requirements for chip size are also getting smaller, and the requirements for MLED display technology are getting higher and higher.

[0053] Currently, full-color display technology is generally achieved through color conversion. In some embodiments, full-color display technology employs methods such as... Figure 1 The display panel shown is a box-type structure. Although this method is simple in manufacturing, it has the problem of color mixing. For example, Figure 1 The encapsulation filler layer 110 shown is relatively thick, for example, thicker than 8μm. In other words, the thickness of the encapsulation filler layer 110 cannot meet the thickness requirements (for example, the thickness is less than 1μm), which would lead to severe color bleeding problems.

[0054] In other embodiments, the full-color display technology employs, for example... Figure 2The display panel shown is implemented with a color conversion and color filter layer above the chip. This technology requires increasing the thickness of the color conversion structure 120 to improve display quality. However, increasing the thickness of the color conversion structure 120 leads to a decrease in light transmittance. For example, the thickness of the color conversion structure 120 is greater than 5μm. To solve the color crosstalk problem... Figure 2 The black matrix layer 130 shown needs to cover the sidewalls of the color conversion structure 120, but this arrangement of the black matrix layer 130 will affect the aperture ratio of the light-emitting device, and the impact of the aperture ratio of the light-emitting device will become increasingly significant as the pixel PPI (pixels per inch) increases.

[0055] Based on this, some embodiments of the present disclosure provide a display panel and a display device that can improve the aperture ratio of the light-emitting device, prevent color crosstalk, and improve the brightness of the display device.

[0056] For ease of description below, an XYZ coordinate system is established. The third direction Z is perpendicular to the plane where the light-emitting substrate is located, the XY plane is perpendicular to the Z direction, and the first direction X intersects the second direction Y. For example, the first direction X and the second direction Y are perpendicular to each other, the first direction X is the row direction X, and the second direction Y is the column direction Y.

[0057] It should be noted that, for example, 31 / 3 in the accompanying drawings of this disclosure indicates that component 31 belongs to film layer 3, and other similar reference numerals in the drawings also follow the above description.

[0058] The display panel and display device provided in this disclosure will be described in detail below.

[0059] like Figure 3A and Figure 3B As shown, some embodiments of this disclosure provide a display panel 100. The display panel 100 includes a driving backplate 1, a light-emitting chip layer 2, a color conversion layer 3, and a color filter layer 4. The light-emitting chip layer 2 includes a plurality of light-emitting chips 20101 and is disposed on one side of the driving backplate 1. The color conversion layer 3 is disposed on the side of the plurality of light-emitting chips 201 away from the driving backplate 1. The color conversion layer 3 includes a plurality of color conversion sections 31, each color conversion section 31 corresponding to one light-emitting chip 201, and there is a first interval G between two adjacent color conversion sections 31. The color filter layer 4 is disposed on the side of the light-emitting chip layer 2 away from the driving backplate 1 and includes a plurality of filter units 41. Each filter unit 41 covers one color conversion section 31. Each filter unit 41 includes a portion extending into the first interval G, and the portion of each filter unit 41 extending into the first interval G is disposed circumferentially along the sidewall of the corresponding color conversion section 31.

[0060] For example, the display panel 100 can be used to display images; the display panel 100 can be, for example, a mini light-emitting diode (Mini LED) display panel, a micro light-emitting diode (Micro LED) display panel, etc., and this disclosure is not limited thereto. This disclosure uses a Micro LED display panel as an example for description.

[0061] For example, such as Figure 4 As shown, the display panel 100 (e.g., a Micro LED display panel) includes a display area AA and a peripheral area BB located on at least one side of the display area AA. For example, the peripheral area BB is located on all four sides of the display area AA and is arranged around the display area AA.

[0062] For example, such as Figure 4 As shown, the display area AA of the display panel 100 can be provided with multiple sub-pixels P and multiple signal lines, such as data signal lines and gate signal lines. Each sub-pixel P includes a pixel driving circuit D and a light-emitting chip 201. Each pixel driving circuit D includes at least one transistor. The peripheral area BB of the display panel 100 can be provided with multiple signal lines, such as initialization signal lines, to ensure the normal display of the display panel 100.

[0063] For example, the pixel driving circuit D can be configured to provide an electrical signal (e.g., driving voltage or driving current) to the light-emitting chip 201 coupled to the pixel driving circuit D in response to the received scan signal and data signal (e.g., the scan signal output by the scan driving circuit and the data signal output by the data driving circuit), so as to drive the light-emitting chip 201 to emit light, thereby enabling the display panel 100 to display an image.

[0064] For example, such as Figure 5 As shown, multiple metal layers on the driving backplate 1 form at least one transistor TFT. For example, the transistor TFT may include a semiconductor pattern T11 disposed on the semiconductor layer 13, a gate pattern T12 disposed on the first gate metal layer 15, and a source pattern T13 and a drain pattern T14 disposed on the source and drain metal layers 19.

[0065] In some embodiments, the drive backplane 1 may further include an insulating layer located between adjacent metal layers, the insulating layer serving to isolate the adjacent metal layers. For example, such as Figure 5As shown, the driving backplane 1 may include a substrate 11, a buffer layer 12, a first gate insulating layer 14 (GI1) located between the semiconductor layer 13 and the first gate metal layer 15, a second gate insulating layer 16 (GI2) located between the second gate metal layer 17 and the first gate metal layer 15, and an interlayer dielectric layer 18 located between the source / drain metal layer 19 and the second gate metal layer 17. The driving backplane 1 may also include other insulating layers, which may be specifically configured according to actual conditions, and are not limited herein.

[0066] In some embodiments, a first planarization layer PLN1, a first electrode layer 20, a light-emitting chip 201, a first passivation layer PVX1, a second planarization layer PLN2, and a second passivation layer PVX1 are sequentially stacked on the driving backplate 1.

[0067] For example, the first electrode layer 20 includes a plurality of bonding electrodes 202, which can be used to bond the light-emitting chip 201 to the pixel driving circuit D.

[0068] For example, such as Figure 4 As shown, a light-emitting chip 201 can be connected to a pixel driving circuit D of the driving backplane 1. The pixel driving circuit D is used to drive the light-emitting chip 201 to emit light. In some embodiments, the multiple light-emitting chips 201 of the display panel 100 may include a red light-emitting chip, a green light-emitting chip, and a blue light-emitting chip, which can emit red light, green light, and blue light respectively, so that the sub-pixel P where the light-emitting chip 201 is located displays red, green, and blue, realizing the display of a color image on the display panel 100. In other embodiments, the multiple light-emitting chips 201 of the display panel 100 may all be light-emitting chips 201 of the same color, for example, they may all be blue light-emitting chips, emitting blue light, and then the blue light emitted by the blue light-emitting chip is converted into light of other colors, such as red or green light, through other film layers (e.g., color conversion layers), so that the sub-pixel P where the light-emitting chip 201 is located displays red, green, and blue, realizing the display of a color image on the display panel 100. The light-emitting chip 201 in the embodiments of this disclosure uses a blue light-emitting chip.

[0069] In some embodiments, such as Figure 4 As shown, the sub-pixels P on the display panel 100 can be arranged in an array, that is, multiple sub-pixels P can be arranged in multiple rows and columns. At this time, the multiple pixel driving circuits D driving the back panel 1 are arranged in an array, and the multiple light-emitting chips 201 are also arranged in an array. The sub-pixels P on the display panel 100 can also be arranged in other forms, which are not limited in this disclosure.

[0070] In some embodiments, such as Figure 3AAs shown, the light-emitting chip 201 is disposed on the side of the bonding electrode 202 away from the driving backplate 1. The light-emitting chip 201 can be a Micro LED light-emitting chip or a Mini LED light-emitting chip. This disclosure does not limit it.

[0071] It should be noted that, referring to Figure 6 The common color crosstalk problem mainly occurs because there is a gap between the light-emitting chip 201 and the color conversion layer 3, causing light at large angles to hit adjacent pixels, thus resulting in color crosstalk and a decrease in the device's color gamut. (Refer to...) Figure 3A The color crosstalk problem in this application is due to the fact that the conversion efficiency of the color conversion layer 3 cannot reach 100%, which causes the blue light to be unable to be completely absorbed by its corresponding color conversion unit 31, and will hit the adjacent color conversion unit 31, causing the adjacent sub-pixel to emit light.

[0072] Reference Figure 7A , Figure 7A The emission spectrum shown indicates that blue light has the highest intensity; therefore, it is necessary to block the color transition between adjacent color conversion units 31 to prevent color crosstalk. (Continue referring to...) Figure 7B and Figure 7C By testing the effect of different excitation wavelengths on the color conversion layer 3, it was found that 530nm green light can excite red light, but red light cannot excite green light. Therefore, the corresponding color filter unit 41 can be used to block the light emitted by the adjacent QD pixel, such as... Figure 7D and Figure 7E As shown, Figure 7D and Figure 7E In this context, QD refers to the color conversion layer, CF refers to the color filter layer, QD-R refers to the red color conversion unit 31, CF-R refers to the red filter unit, CF-G refers to the green filter unit, and CF-B refers to the blue filter unit. The red color conversion unit 31 is completely encased with a red filter unit 41 of a certain thickness. Then, a green filter unit 41 of a certain thickness is formed on the green color conversion unit 31, and finally, a blue filter unit 41 is formed. Thus, when light emitted from the red color conversion unit 31 passes through the green filter unit 41, the remaining blue light is filtered out. Pure red light hitting the green color conversion unit 31 will not cause the green color conversion unit 31 to emit excited light; similarly, blue light hitting the green filter unit 41 will not enter the green color conversion unit 31 and emit excited light. Therefore, as... Figure 3A As shown, in the embodiments of this application, the positions of the color conversion layer 3 and the color filter layer 4 are arranged such that the portion of each filter unit 41 extending to the first interval G is arranged circumferentially along the side wall of the corresponding color conversion part 31. This not only solves the above-mentioned color mixing problem, but also ensures the aperture ratio of the display panel and improves the display effect.

[0073] In some embodiments, such as Figure 3AAs shown, the plurality of filter units 41 include a first filter unit 411 and a second filter unit 412 arranged adjacent to each other. The first filter unit 411 is configured to transmit a first color light, and the second filter unit 412 is configured to transmit a second color light. The first filter unit 411 and the second filter unit 412 overlap in the thickness direction of the display panel 100, and the orthographic projection of the overlapping portion on the driving back plate 1 is located within the orthographic projection range of the first interval G on the driving back plate 1.

[0074] For example, refer to Figure 3A The first filter unit 411 and the second filter unit 412 overlap in the thickness direction of the display panel 100, and the orthographic projection of the overlapping portion on the driving back plate 1 is located within the orthographic projection range of the first interval G on the driving back plate 1. That is, both the first filter unit 411 and the second filter unit 412 extend partially into the first interval G. For example, the first filter unit 411 is a red filter unit, and the second filter unit 412 is a green filter unit. The portion of the first filter unit 411 located in the first interval G can filter out blue light. During the process of pure red light being incident on the green color conversion part 31, the green color conversion part 31 is wrapped by a green filter unit 41 of a certain thickness. That is, the red light will be further blocked by the green filter unit. Therefore, the above-mentioned arrangement of the first filter unit 411 and the second filter unit 412 can play a role in preventing color bleeding, and at the same time, increase the aperture ratio of the display panel to improve the display effect.

[0075] In some embodiments, such as Figure 3B As shown, the first filter unit 411 is a first part 411a near the second filter unit 412, and the first part 411a extends within the first interval G. The second filter unit 412 is a second part 412a near the first filter unit 411, and the second part 412a overlaps the first part 411a on the side away from the drive backplate 1.

[0076] For example, the above configuration means that only one color filter unit is provided within the first interval G. For example, the first filter unit 411 is a red filter unit and the second filter unit 412 is a green filter unit. The first interval G is only provided with a red filter unit. The portion of the first filter unit 411 located in the first interval G can filter out blue light. During the process of pure red light shining on the green color conversion unit 31, the green color conversion unit 31 will not be excited. Therefore, the above configuration of the first filter unit 411 and the second filter unit 412 can also play the role of preventing color bleeding. At the same time, it increases the aperture ratio of the display panel to improve the display effect.

[0077] In some embodiments, such as Figure 3B As shown, the first filter unit 411 is configured to transmit red light or green light.

[0078] It should be noted that the first filter unit 411 extending within the first interval G can be either a red filter unit or a green filter unit.

[0079] In some embodiments, such as Figure 3A As shown, a portion of the first filter unit 411 and a portion of the second filter unit 412 are provided at the first interval G position, and the portion of the first filter unit 411 and the portion of the second filter unit 412 are in contact with each other.

[0080] For example, refer to Figure 3A Both the first filter unit 411 and the second filter unit 412 have a portion extending into the first interval G, and these two portions are in contact with each other. This arrangement can ensure the anti-color bleeding requirement and avoid light leakage, thereby improving the display effect of the display panel.

[0081] In some embodiments, such as Figure 3A As shown, the first filter unit 411 is configured to transmit one of red light, green light and blue light.

[0082] In some embodiments, such as Figure 3A As shown, the first filter unit 411 is a red filter unit, and the color conversion part 31 corresponding to the first filter unit 411 has two first intervals G on both sides, and a portion of the first filter unit 411 is disposed in each of the two first intervals G.

[0083] For example, such as Figure 3A As shown, the first filter unit 411 is a red filter unit, and the two adjacent filter units are a green filter unit and a blue filter unit, respectively. The first filter unit 411 is provided in both first intervals G because the red filter unit can filter other colors of light and produce pure red light. When the pure red light hits the adjacent green color conversion unit 31, the green color conversion unit 31 will not be excited. When it hits the adjacent blue color conversion unit 31, the red light can be blocked by the part of the blue filter unit 41 located in the first interval G, thereby avoiding color mixing and improving the display effect.

[0084] In some embodiments, continue to refer to Figure 3A The display panel 100 also includes a barrier layer 5, which is disposed between the light-emitting chip layer 2 and the color conversion layer 3. The barrier layer 5 has a plurality of first openings K1, a portion of the color conversion part 31 is located in the first opening K1, and a barrier structure 51 is formed between two adjacent first openings. Each barrier structure 51 is located in a first interval G. The barrier structure 51 is closer to the driving back plate 1 than the first filter unit 411.

[0085] For example, the material of the barrier layer 5 can be a reflective metal such as aluminum, nickel, or silver. The thickness of the barrier layer 5 in the direction perpendicular to the display panel 100 needs to ensure that the light emitted by the light-emitting chip 201 is reflected by the barrier structure 51 and incident on the area corresponding to the sub-pixel P.

[0086] For example, the barrier structure 51 of the barrier layer 5 can block this part of the light. After multiple reflections within the barrier structure 51, this part of the light is emitted out of the display panel 100, preventing the light from being emitted into adjacent sub-pixels P due to a large emission angle. This effectively prevents light crosstalk between adjacent sub-pixels P in the display panel 100 and effectively improves the display quality of the display panel 100. Furthermore, the multiple deep holes between the barrier structures 51 can achieve collimated light emission, allowing more light to be emitted out of the display panel 100 and improving the light emission efficiency of the display panel 100.

[0087] In some embodiments, continue to refer to Figure 3A The display panel 100 also includes an encapsulation layer 6, which is located between the color conversion layer 3 and the color filter layer 4. The encapsulation layer 6 forms a groove 61 at the first interval G, and the portion of the filter unit 41 extending to the first interval G is located in the groove 61.

[0088] For example, since there is a height difference between the color conversion part 31 and the barrier structure 51, during the formation of the encapsulation layer 6, the portion of the encapsulation layer 6 between adjacent color conversion parts 31 will naturally form a groove 61. That is, the encapsulation layer 6 forms a groove 61 at the first interval G. Since the portion of the filter unit 41 extending to the first interval G is located in the groove 61, the light emitted along the color conversion part 31 adjacent to the groove 61 will be blocked by the filter unit 41 in the groove 61, thereby avoiding the problem of color mixing.

[0089] In some embodiments, continue to refer to Figure 3A The color conversion section 31 includes a first sub-section 31a and a second sub-section 31b connected to each other. The first sub-section 31a is located in the first opening K1, and the two ends of the second sub-section 31b in the row direction X cover at least a portion of the surface of the retaining wall structure 51 away from the drive back plate 1. The two opposing sidewalls of the groove 61 respectively cover the sidewalls of the second sub-sections 31b of the two adjacent color conversion sections 31.

[0090] For example, the color conversion section 31 includes a first sub-section 31a and a second sub-section 31b connected to each other. The light emitted along the first sub-section 31a can be reflected by the barrier structure 51 to avoid light crosstalk between adjacent sub-pixels. The second sub-section 31b can prevent color crosstalk by blocking the filter unit 41 located in the groove 61. That is, the light emitted along the color conversion section 31 can be effectively blocked to further prevent the occurrence of color crosstalk.

[0091] In some embodiments, continue to refer to Figure 3A Along the direction away from the drive backplate 1, the size of the groove 61 gradually decreases in the row direction X.

[0092] For example, since part of the color conversion part 31 will block the side surface of the barrier structure 51 away from the drive back plate 1 during the formation process, and this part is an inverted trapezoidal structure, the size of the groove 61 in the row direction X gradually decreases during the formation of the encapsulation layer 6.

[0093] In some embodiments, refer to Figure 3A and Figure 3B The groove 61 contains a portion of the first filter unit 41, or the groove 61 contains a portion of the first filter unit 411 and a portion of the second filter unit 412.

[0094] For example, such as Figure 3B As shown, a portion of the first filter unit 41 is provided in the groove 61, and the first filter unit 41 is a red filter unit or a green filter unit. It should be noted that when the first filter unit 41 is a blue filter unit and the second filter unit is a red filter unit, a portion of the first filter unit 411 and a portion of the second filter unit 412 need to be provided in the groove 61 to ensure the anti-color mixing requirement and thus improve the display effect.

[0095] For example, such as Figure 3A As shown, a portion of the first filter unit 41 and a portion of the second filter unit 412 are provided in the groove 61, and the first filter unit 41 and the portion of the second filter unit 412 are any two of the red filter unit, green filter unit and blue filter unit.

[0096] In some embodiments, refer to Figure 3CThe color conversion section 31 includes a first color conversion section 311 and a second color conversion section 312. The first color conversion section 311 is positioned corresponding to the first filter unit 411, and the second color conversion section 312 is positioned corresponding to the second filter unit 412. The maximum dimension of the first filter unit 411 in the row direction X within the groove 61 between the first color conversion section 311 and the second color conversion section 312 is the distance between the bottom of the groove 61 near the boundary of the first color conversion section 311 and the boundary of the second color conversion section 312 away from the drive back plate 1 and near the boundary of the groove 61, and this distance is 5μm.

[0097] For example, such as Figure 3C As shown, the maximum dimension of the first filter unit 411 in the groove 61 between the first color conversion section 311 and the second color conversion section 312 in the horizontal direction X can be understood as the first filter unit 411 being completely filled in the groove 61. The first filter unit 411 is close to the boundary of the second color conversion section 312 on one side, and is flush with the boundary of the second color conversion section 312 on the side away from the driving back plate 1 and close to the groove 61 in the thickness direction of the display panel 100.

[0098] In some embodiments, continue to refer to Figure 3C The surface of the color conversion layer 3 away from the drive back plate 1 is the first surface 1a. The minimum size of the first filter unit 411 located in the groove 61 between the first color conversion part 311 and the second color conversion part 312 in the row direction X is the distance between the two boundaries where the first filter unit 411 intersects with the first surface 1a, and this distance is 1.5μm.

[0099] For example, such as Figure 3C As shown, the surface of the color conversion layer 3 away from the driving backplate 1 is the first surface 1a. The two boundaries where the first filter unit 411 intersects with the first surface 1a are distributed as B1 and B2. Therefore, the minimum size of the first filter unit 411 located in the groove 61 between the first color conversion part 311 and the second color conversion part 312 in the row direction X is the distance between the boundary B1 and the boundary B2, and this distance is 1.5μm.

[0100] The aforementioned limitation on the size of the first filter unit 411 located in the groove 61 between the first color conversion part 311 and the second color conversion part 312 is mainly to ensure the anti-color mixing function, that is, to ensure that light can pass through the thickness of the first filter unit 411 and to ensure the function of blocking light to prevent light leakage.

[0101] In some embodiments, continue to refer to Figure 3AThe display panel 100 also includes a reflective layer 7, which is disposed between the barrier layer 5 and the color conversion layer 3. The reflective layer 7 includes a plurality of reflective portions 71, which are disposed between the first sub-part 31a of the color conversion portion 31 and the side wall of the barrier structure 51. The reflective portions 71 and the groove 61 do not overlap in the orthographic projection of the drive back plate 1.

[0102] For example, the reflective layer 7 can increase the number of times the light emitted by the light-emitting chip 201 is reflected between the barrier structures 51, effectively increasing the light output of the display panel 100 and preventing crosstalk between the sub-pixels P of the display panel 100.

[0103] For example, the material of the reflective layer 7 can be a metallic material, such as aluminum or silver vapor deposited on the sidewall of the retaining wall structure 51.

[0104] In some embodiments, continue to refer to Figure 3A When all the light-emitting chips 201 are blue light-emitting chips, the color conversion unit 31 (red color conversion unit) converts the blue light emitted by the blue light-emitting chip into red light; the color conversion unit 31 (green color conversion unit) converts the blue light emitted by the blue light-emitting chip into green light; the color conversion unit 31 (blue color conversion unit) can be made of transparent material, so that the blue light emitted by the blue light-emitting chip can pass through.

[0105] In some embodiments, continue to refer to Figure 3A The color filter layer 4 includes multiple filter units 41, which may include, for example, a red filter unit, a green filter unit, and a blue filter unit. The red filter unit corresponds to the red color conversion unit (the red filter unit is located above the red color conversion unit), the green filter unit corresponds to the green color conversion unit (the green filter unit is located above the green color conversion unit), and the blue filter unit corresponds to the white color conversion unit (the blue filter unit is located above the white color conversion unit). The red filter unit, the green filter unit, and the blue filter unit allow red light, green light, and blue light to pass through, respectively.

[0106] In some embodiments, continue to refer to Figure 3A The blue light emitted by the light-emitting chip 201 (blue light-emitting chip) is converted into red light and green light after passing through the red color conversion section and the green color conversion section, respectively. After passing through the red filter section and the green filter section, the red or green light displayed by the corresponding sub-pixel P is made purer. The blue light emitted by the light-emitting chip 201 (blue light-emitting chip) is filtered by the blue filter section, making the blue displayed by the corresponding sub-pixel P more pure, thereby ensuring the purity of the color displayed by each sub-pixel P.

[0107] For example, the multiple light-emitting chips 201 can all be light-emitting chips 20-1 of the same color, emitting light of the same color. For instance, the multiple light-emitting chips 201 can all be blue light-emitting chips, emitting blue light.

[0108] In this solution, the color conversion unit 31 corresponding to the blue filter unit is a white color conversion unit. After blue light of different wavelengths passes through this white color conversion unit, the conversion efficiency of blue light to white light is relatively small, which reduces the sensitivity of the color conversion unit 31 to, for example, the wavelength of blue light, and effectively reduces the final color brightness difference displayed by the display panel 100.

[0109] Reference Figures 9A-9C , Figures 9A-9C for Figure 3B The diagram shows the fabrication process of the display panel 100. In the process of fabricating the color filter layer 4, filter units 41 of different colors are fabricated step-by-step, as shown in the figure. Figure 9C For example, a first filter unit 411 is formed first, then a second filter unit 412 is prepared, wherein the first filter unit 411 is, for example, a red filter unit, the second filter unit 412 is, for example, a green filter unit, and finally a blue filter unit is prepared.

[0110] For example, such as Figure 9C As shown, after the color filter layer 4 is formed, a protective adhesive layer 8 is also included to protect the color filter layer 4.

[0111] Furthermore, some embodiments of this disclosure also provide a display device 1000, such as... Figure 8 As shown, the display device 1000 includes a display panel 100 as provided in any of the above embodiments.

[0112] For example, the display device 1000 includes the display panel 100 provided in the above embodiments, and has all the beneficial effects of the display panel 100, which will not be described in detail here.

[0113] Exemplarily, the aforementioned display device 1000 can be any device that displays images, whether moving (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, the embodiments described are contemplated to be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, television (TV) products, wireless devices, personal digital assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures (e.g., displays of images of a piece of jewelry), etc. Figure 8 The following is an illustration using the display device 1000 as an example of a mobile phone product.

[0114] In terms of its form, the display device 1000 can be a flat panel display device, a curved display device, or a foldable display device, etc. In terms of its shape, the display device 1000 can be rectangular or circular, etc. This disclosure does not impose any limitations in this regard, and adaptive designs can be made according to actual needs.

[0115] In some embodiments, the display device 1000 includes a display panel 100 and at least one driver chip 200 (Integrated Circuit, IC); the display panel 100 is coupled to the driver chip 200, and the driver chip 200 is configured to provide electrical signals to the display panel 100, such as control signals.

[0116] For example, the driver chip 200 can be a central processing unit, a digital signal processor, a microcontroller, a programmable logic controller, etc. For instance, the driver chip 200 may also include a memory, a power supply module, etc., and implement power supply and signal input / output functions through separately provided wires, signal lines, etc. For instance, the driver chip 200 may also include hardware circuitry and computer-executable code. The hardware circuitry may include conventional very-large-scale integrated circuits (VLSI) or gate arrays, as well as existing semiconductors or other discrete components such as logic chips and transistors; the hardware circuitry may also include field-programmable gate arrays, programmable array logic, programmable logic devices, etc.

[0117] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0118] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display panel, characterized by, include: Drive backplane; A light-emitting chip layer, comprising a plurality of light-emitting chips disposed on one side of the driving backplate; A color conversion layer is disposed on the side of the plurality of light-emitting chips away from the driving backplate, and includes a plurality of color conversion parts, each of the color conversion parts being disposed corresponding to one light-emitting chip, and a first interval being between two adjacent color conversion parts; A color filter layer is disposed on the side of the light-emitting chip layer away from the driving backplate, and includes a plurality of filter units. Each filter unit covers one of the color conversion parts. Each filter unit includes a portion extending into the first interval, and the portion of each filter unit extending into the first interval is disposed circumferentially along the sidewall of the corresponding color conversion part.

2. The display panel according to claim 1, characterized in that, The plurality of filter units include a first filter unit and a second filter unit arranged adjacent to each other, wherein the first filter unit is configured to transmit a first color light and the second filter unit is configured to transmit a second color light; The first filter unit and the second filter unit overlap in the thickness direction of the display panel, and the orthographic projection of the overlapping portion on the driving back plate is located within the orthographic projection range of the first interval on the driving back plate.

3. The display panel of claim 2, wherein, The first filter unit is a first part located near the end of the second filter unit, and the first part extends within the first interval. The second filter unit is a second part located near the side of the first filter unit, and the second part overlaps the side of the first part away from the drive backplate.

4. The display panel of claim 3, wherein, The first filter unit is configured to transmit either red or green light.

5. The display panel of claim 2, wherein, A portion of the first filter unit and a portion of the second filter unit are disposed at the first interval position, and the portion of the first filter unit and the portion of the second filter unit are in contact with each other.

6. The display panel of claim 5, wherein, The first filter unit is configured to transmit one of red light, green light, and blue light.

7. The display panel of any one of claims 2-6, wherein, The first filter unit is a red filter unit, and the color conversion part corresponding to the first filter unit has two first intervals on both sides, and a portion of the first filter unit is disposed in each of the two first intervals.

8. The display panel according to claim 2, characterized in that, Also includes: A barrier layer extends between the light-emitting chip layer and the color conversion layer. The barrier layer has a plurality of first openings. A portion of the color conversion part is located within the first opening. A barrier structure is formed between two adjacent first openings. Each barrier structure is located within a first interval. The barrier structure is closer to the driving backplate than the first filter unit.

9. The display panel of claim 8, wherein, Also includes: An encapsulation layer is located between the color conversion layer and the color filter layer. The encapsulation layer forms a groove at the first interval, and the portion of the filter unit extending to the first interval is located within the groove.

10. The display panel of claim 9, wherein, The color conversion section includes a first sub-section and a second sub-section connected to each other, wherein the first sub-section is located within the first opening, and the two ends of the second sub-section in the row direction cover at least a portion of the surface of the retaining wall structure away from the drive back plate; The two opposite sidewalls of the groove respectively cover the sidewalls of the second sub-parts of the two adjacent color conversion parts.

11. The display panel of claim 9, wherein, Along the direction away from the drive backplate, the size of the groove in the row direction gradually decreases.

12. The display panel according to claim 9, characterized in that, The groove contains a portion of the first filter unit, or the groove contains a portion of the first filter unit and a portion of the second filter unit.

13. The display panel according to claim 9, characterized in that, The color conversion section includes a first color conversion section and a second color conversion section. The first color conversion section corresponds to the position of the first filter unit, and the second color conversion section corresponds to the position of the second filter unit. The maximum dimension of the first filter unit in the row direction located in the groove between the first color conversion section and the second color conversion section is 5 μm. The distance between the bottom of the groove near the boundary of the first color conversion section and the boundary of the second color conversion section away from the drive back plate and near the boundary of the groove is 5 μm.

14. The display panel according to claim 13, characterized in that, The surface of the color conversion layer away from the drive backplate is the first surface. The minimum size of the first filter unit located in the groove between the first color conversion part and the second color conversion part in the row direction is the distance between the two boundaries where the first filter unit intersects with the first surface, and this distance is 1.5 μm.

15. The display panel of any one of claims 10-14, wherein, Also includes: A reflective layer is disposed between the barrier layer and the color conversion layer. The reflective layer includes a plurality of reflective portions. The reflective portions are disposed between the first sub-part of the color conversion portion and the sidewall of the barrier structure, and the reflective portions and the groove do not overlap in the orthographic projection of the drive back plate.

16. A display device comprising: include: The display panel as described in any one of claims 1 to 15; The driver chip is connected to the display panel.

Images