CN113421907A - Display panel and display device - Google Patents

Abstract

The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and aims to improve the display brightness of the display panel and solve the problem of color cast in the display panel. The display panel includes: display substrates and color filter layers. The display substrate is configured to emit white light; the color filter layer is arranged on the light emergent side of the display substrate and comprises a plurality of color filter patterns; the plurality of color filter patterns include: the first color filter pattern and the second color filter pattern are adjacent and have different transmission colors. The color filter layer is provided with a light-transmitting area, white light emitted by the display substrate can be emitted through the light-transmitting area, and the light-transmitting area is at least positioned between the first color filter pattern and the second color filter pattern.

Description

Display panel and display device

Technical Field

The invention relates to the technical field of display, in particular to a display panel and a display device.

Background

The Micro Organic Light Emitting Diode (Micro OLED) display panel is a Micro display panel which uses a mono-silicon integrated circuit as a driving back plate and a top Light Emitting OLED device as a Light source, has the advantages of small volume, Light weight, high contrast, high response speed, low power consumption and the like, and is expected to be applied to next generation mobile display terminal equipment. However, the Micro OLED display panel generally has a problem of low display brightness at present, and therefore, the improvement of the display brightness of the Micro OLED display panel becomes a focus in research and product development.

Referring to fig. 1, light emitted by one OLED device in the Micro OLED display panel can be approximately regarded as a circular truncated cone W with an infinite height, wherein an included angle between an axis Z of the circular truncated cone W and a bus L is referred to as a light-emitting angle α of the light-emitting device E. The greater the light exit angle α, the lower the intensity of light emitted by the OLED device per unit volume. Since the half-width (angle corresponding to 50% of the peak value of the luminance decay) of the Tandem type Tandem OLED device is generally ± 35 °, the light-emitting angle of the light-emitting device in the Micro OLED display panel is generally set to 35 ° to 40 °. In the related art, the light-emitting angle of the OLED device is set to be greater than 60 °, because when the light-emitting angle is greater than 60 °, the intensity enhancement effect of light emitted by the OLED device under the microcavity effect is more obvious than that when the light-emitting angle is 35 ° to 40 °, that is, a brightness inversion phenomenon is generated, and thus the display brightness of the display panel can be improved to a certain extent.

However, when the light-emitting angle of the OLED device is increased and the distance between two adjacent color filters of different colors in the color filter substrate is not changed, light emitted by one OLED device may illuminate the adjacent color filter in addition to the corresponding color filter, so that the color crosstalk phenomenon may occur in the display process of the display panel. The color cross phenomenon causes the problem of color cast of the display panel in the display process.

Disclosure of Invention

The embodiment of the invention provides a display panel and a display device, which are used for improving the color cast problem in the display process on the basis of improving the display brightness of a Micro OLED display panel.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, a display panel is provided, the display panel comprising: display substrates and color filter layers. The display substrate is configured to emit white light; the colored filter layer sets up in display substrate's light-emitting side, and the colored filter layer includes a plurality of colored filter pattern, a plurality of colored filter pattern include: the first color filter pattern and the second color filter pattern are adjacent and have different transmission colors. The color filter layer is provided with a light-transmitting area, white light emitted by the display substrate can be emitted through the light-transmitting area, and the light-transmitting area is at least positioned between the first color filter pattern and the second color filter pattern.

In some embodiments, the plurality of color filter patterns further includes: and the light transmission color of the third color filter pattern is different from the light transmission colors of the first color filter pattern and the second color filter pattern. The light-transmitting region is also located between the third color filter pattern and at least one of the first color filter pattern and the second color filter pattern.

In some embodiments, the light-transmitting region is disposed around a circumference of at least one of the plurality of color filter patterns.

In some embodiments, the width of the portion of the light-transmitting region located between two adjacent color filter patterns is equal everywhere.

In some embodiments, the width is in the range of 0.2-0.4 μm.

In some embodiments, the display panel further includes a transparent portion, the transparent portion allows white light to pass through, and the transparent portion is disposed in the light-transmitting region.

In some embodiments, the material of the transparent portion is an organic polymer.

In some embodiments, the display substrate includes a driving backplane and a plurality of light emitting devices positioned between the driving backplane and the color filter layer. And the orthographic projection of the light-emitting device on the color filter layer and the color film pattern have an overlapping region.

In some embodiments, the driving backplane comprises a silicon substrate and at least one pixel driving circuit disposed on the silicon substrate, one pixel driving circuit coupled to one light emitting device.

In some embodiments, the display panel further includes a lens layer disposed on a side of the color filter layer away from the display substrate, the lens layer including a plurality of microlenses, an orthographic projection of one microlens on the color filter layer having an overlapping area with an orthographic projection of one light emitting device on the color filter layer.

In some embodiments, in the case where the display panel includes a transparent part, the material of the lens layer is the same as the material of the transparent part.

In some embodiments, the display panel further comprises a protective layer disposed on a side of the lens layer away from the display substrate; and the refractive index of the protective layer is less than the refractive index of the lens layer.

On one hand, the color filter layer comprises a light-transmitting area which can transmit white light emitted from the display substrate, so that the light-emitting quantity of the light-emitting side of the display panel is increased, and the display brightness of the display panel is improved; on the other hand, the light-transmitting area is at least positioned between the first color filter pattern and the second color filter pattern, so that the part with a larger light-emitting angle in the white light emitted from the display substrate and irradiating the first color filter pattern can irradiate the outside of the first color filter pattern, and the part of the light can be emitted through the light-transmitting area, thereby reducing the light irradiating the second color filter pattern adjacent to the light-transmitting area, and reducing the difference between the brightness of the light emitted through the second color filter pattern and the theoretical brightness. Similarly, the part of the white light emitted from the display substrate and illuminating the second color filter pattern, which has a larger light-emitting angle, can illuminate the outside of the second color filter pattern, and the part of the light can also be emitted through the light-transmitting area, so that the light illuminating the first color filter pattern adjacent to the first color filter pattern is reduced, and the difference between the brightness of the light emitted through the first color filter pattern and the theoretical brightness is reduced. Thereby improving the color cast problem in the display panel.

In a second aspect, a display device is provided, the display device comprising the display panel of any of the above embodiments.

The beneficial effects that can be achieved by the display device provided by the embodiment of the invention are the same as those that can be achieved by the display panel described in any implementation manner, and are not described herein again.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a structural view of a light emitting device of a display panel in the related art;

fig. 2A is a structural diagram of a display panel according to some embodiments of the present invention;

FIG. 2B is a block diagram of a display device according to some embodiments of the invention;

fig. 3 is a structural diagram of a display substrate according to some embodiments of the present invention;

FIG. 4A is a block diagram of another display panel provided in accordance with some embodiments of the present invention;

FIG. 4B is a structural diagram of a display panel in the related art;

fig. 4C is a structural view of another display panel in the related art;

fig. 5 is a top view of a color filter layer of a display panel according to some embodiments of the invention;

fig. 6 is an enlarged view of a portion a of the color filter layer shown in fig. 5;

FIG. 7 is a block diagram of yet another display panel provided in accordance with some embodiments of the present invention;

FIG. 8 is a block diagram of another display substrate provided in accordance with some embodiments of the present invention;

fig. 9A is a structural diagram of a light emitting device in a display panel according to some embodiments of the present invention;

fig. 9B is a structural diagram of another light emitting device in a display panel according to some embodiments of the present invention;

FIG. 10 is a block diagram of yet another display panel provided in accordance with some embodiments of the present invention;

fig. 11 is an enlarged view of a portion B of the display panel shown in fig. 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Unless the context requires otherwise, throughout the description and the claims, the term "comprise" and its other forms, such as the third person's singular form "comprising" and the present participle form "comprising" are to be interpreted in an open, inclusive sense, i.e. as "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless otherwise specified.

In describing some embodiments, expressions of "coupled" and "connected," along with their derivatives, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other. As another example, some embodiments may be described using the term "coupled" to indicate that two or more elements are in direct physical or electrical contact. However, the terms "coupled" or "communicatively coupled" may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other. The embodiments of the invention herein are not necessarily limited to that of this disclosure.

"at least one of A, B and C" has the same meaning as "A, B or at least one of C," each including the following combination of A, B and C: a alone, B alone, C alone, a and B in combination, a and C in combination, B and C in combination, and A, B and C in combination.

"A and/or B" includes the following three combinations: a alone, B alone, and a combination of A and B.

"plurality" means at least two.

The use of "adapted to" or "configured to" herein is meant to be an open and inclusive language that does not exclude devices adapted to or configured to perform additional tasks or steps.

Additionally, the use of "based on" or "according to" means open and inclusive, as a process, step, calculation, or other action that is "based on" or "according to" one or more stated conditions or values may in practice be based on additional conditions or exceeding the stated values.

As used herein, "about," "approximately," or "approximately" includes the stated values as well as average values that are within an acceptable range of deviation for the particular value, as determined by one of ordinary skill in the art in view of the measurement in question and the error associated with measurement of the particular quantity (i.e., the limitations of the measurement system).

Example embodiments are described herein with reference to cross-sectional and/or plan views as idealized example figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the exemplary embodiments.

An embodiment of the present invention provides a display device, which refers to a product having an image display function, and may be, for example: a display, a television, a billboard, a Digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a Personal Digital Assistant (PDA), a Digital camera, a camcorder, a viewfinder, a monitor, a navigator, a vehicle, a large-area wall, a home appliance, an information inquiry apparatus (e.g., a business inquiry apparatus, a monitor, etc. in the departments of e-government, banking, hospital, electric power, etc.).

The display device may be a near-eye display device, such as a head mounted display, AR (Augmented Reality) glasses, VR (Virtual Reality) all-in-one machine, a stereoscopic display mirror, or the like. In addition, display device can also be intelligent wearing equipment, for example intelligent wrist-watch, intelligent bracelet, intelligent head hoop etc..

The display device includes a display panel. The display panel may be an OLED (Organic Light Emitting Diode) display panel, a QLED (Quantum Dot Light Emitting Diodes) display panel, a micro LED (including mini LED or micro LED) display panel, a micro OLED (micro OLED) display panel, or the like. Further, the display device may further include: a driving circuit (including a source driver, for example), a case for fixing the display panel, and the like.

Referring to fig. 2A and 2B, the display panel 1 includes a display substrate 10 and a color filter layer 20. Wherein the display substrate 10 is configured to emit white light.

Fig. 3 illustrates a top view of a display substrate 10 provided by some embodiments of the present disclosure. Referring to fig. 3, the display substrate 10 has a light exiting area AA and a peripheral area S located at least on one side of the light exiting area AA, for example, the peripheral area S may be disposed around the light exiting area AA.

The display substrate 10 includes a plurality of sub-pixels P disposed in the light-emitting area AA, and each sub-pixel P can emit light of one color, for example, each sub-pixel P can emit white light. In the display substrate 10, the luminance of the white light emitted from the sub-pixels P may be different.

Exemplarily, referring to fig. 2A, the display panel 1 is an OLED display panel, one sub-pixel P includes one light emitting device E, for example, the light emitting device E may emit white light, and the light emitting luminance of the light emitting device E is adjustable, then the display substrate 10 may emit white light by the light emission of a plurality of light emitting devices E; further exemplarily, referring to fig. 2B, the display panel 1 is a liquid crystal display panel, and the liquid crystal display panel includes an external light source 2, wherein the external light source may be, for example, a backlight module in a display device, and the backlight module is disposed on a back side of the liquid crystal display panel (i.e., a side away from a display surface of the liquid crystal display panel). The display substrate in the liquid crystal display panel is a liquid crystal display substrate, the white light emitted from the liquid crystal display substrate comes from an external light source 2, that is, each sub-pixel P in the liquid crystal display substrate can emit the white light from the external light source 2, and the brightness of the white light emitted from the sub-pixel P is adjustable, for example, one sub-pixel P of the liquid crystal display substrate includes a pixel electrode and a common electrode for forming a driving electric field, and the driving electric field is configured to drive liquid crystal molecules in the sub-pixel P to rotate, so as to adjust the amount of the white light emitted from the external light source 2 and transmitted through the sub-pixel P, and further adjust the brightness of the light emitted from the sub-pixel P.

With continued reference to fig. 2A and 2B, the color filter layer 20 is disposed on the light exit side 10a of the display substrate 10, and the color filter layer 20 includes a plurality of color filter patterns 200, and one color filter pattern 200 corresponds to one color filter. One color filter pattern 200 may transmit one monochromatic light, for example, one color filter pattern 200 may transmit red light, and the color filter pattern 200 transmitting red light may be referred to as a red filter pattern. The plurality of color filter patterns 200 in the color filter layer 20 may be a plurality of color filter patterns that transmit the same monochromatic light, for example, the plurality of color filter patterns 200 in the color filter layer 20 may be a plurality of red filters; there may also be a plurality of color filter patterns 200 that transmit different kinds of monochromatic light, and illustratively, the plurality of color filter patterns 200 in the color filter layer 20 includes three filter patterns that transmit monochromatic light, for example, the three monochromatic light may be three primary light: red, green, and blue, the plurality of color filter patterns 200 in the color filter layer 20 may include at least one red filter pattern R, at least one green filter pattern G, and at least one blue filter pattern B.

In the display panel 1, one subpixel P in the display substrate 10 may correspond to one color filter pattern 200 in the color filter layer 20, and white light emitted from the subpixel P may be irradiated on the corresponding color filter pattern 200 to emit monochromatic light of a corresponding color. For example, when white light emitted from the sub-pixel P is irradiated onto the corresponding color filter pattern 200, the color filter pattern 200 filters out part of the color light of the white light, and only transmits one color light (which may also be referred to as monochromatic light), and the color of the monochromatic light transmitted from the color filter pattern 200 is different from the light emitting color of the light emitting device E.

For example, in the case where the color filter layer 20 includes the color filter patterns 200 having different transmission colors, full-color display of the display panel 1 can be realized.

The plurality of color filter patterns 200 in the color filter layer 20 include first and second color filter patterns 210 and 220 that are adjacent to each other and have different transmission colors. The first color filter pattern 210 and the second color filter pattern 220 are color filter patterns with different transmission colors. The adjacent first and second color filter patterns 210 and 220 do not include any other color filter pattern 200 between the first and second color filter patterns 210 and 220.

Exemplarily, the first and second color filter patterns 210 and 220 may be any two of the red, green, and blue filter patterns R, G, and B, respectively. For example, in the case where the first color filter pattern 210 is a red filter pattern R, the second color filter pattern 220 may be a green filter pattern G or a blue filter pattern B; in the case where the first color filter pattern 210 is the green filter pattern G, the second color filter pattern 220 may be the red filter pattern R or the blue filter pattern B; in the case where the first color filter pattern 210 is the blue filter pattern B, the second color filter pattern 220 may be the red filter pattern R or the green filter pattern G.

Referring to fig. 4A, the color filter layer 20 has a light-transmitting area 300, and the white light (e.g., W1, W2) emitted from the display substrate 10 can exit through the light-transmitting area 300, and the light-transmitting area 300 is at least located between the first color filter pattern 210 and the second color filter pattern 220.

The white light emitted from the display substrate 10 may be divided into a plurality of white light sub-beams, and one white light sub-beam may irradiate one color filter pattern 200. Illustratively, one white light sub-beam is light emitted by one light emitting device in the display substrate 10. Illustratively, the white light sub-beam illuminating the first color filter pattern 210 in the display panel 1 is W1, and the white light sub-beam illuminating the second color filter pattern 220 is W2, wherein the white light sub-beam W1 and the white light sub-beam W2 may have the same or different brightness, and in the case that the white light sub-beam W1 and the white light sub-beam W2 have different brightness, the monochromatic light transmitted through the first color filter pattern 210 and the second color filter pattern 220 has different brightness and not only has different color. When the white light beam W1 irradiates the first color filter pattern 210, since the irradiation area of the white light beam W1 may be larger than the area of the first color filter pattern 210, a portion of the white light beam W1 with a smaller light-emitting angle irradiates the first color filter pattern 210, and a portion of the white light beam W1 with a larger light-emitting angle emits through the light-transmitting region 300. Similarly, a part of the white light beam W2 with a larger light emitting angle may also exit through the light-transmitting region 300 between the first color filter pattern 210 and the second color filter pattern 220.

In the related art 1, referring to fig. 4B, there is no light transmission region between the first color filter pattern 210 and the second color filter pattern 220, for example, the first color filter pattern 210 and the second color filter pattern 220 are disposed at a zero interval. Then, when the irradiation area of the white light beam W1 is larger than that of the first color filter pattern 210, a portion (for example, a portion near the edge) of the white light beam W1 with a larger light-emitting angle may be irradiated onto the adjacent second color filter pattern 220, so that the second color filter pattern 220 is irradiated by the white light beam W1 while being irradiated by the white light beam W2, and then the brightness of monochromatic light emitted from the second color filter pattern 220 is increased compared to that irradiated by the white light beam W2 alone. Also, the luminance of the monochromatic light generated by irradiating the second color filter pattern 220 with the white light beam W1 is a wrong display luminance in the display panel 1, which may cause a problem of color shift of the display panel 1 at the time of display. Similarly, a portion of the white light sub-beam W2 with a larger light-emitting angle may also irradiate the adjacent first color filter pattern 210, resulting in an erroneous display brightness.

In supplementary related art 2, referring to fig. 4C, a black matrix BM made of a light absorbing material is included between the first color filter pattern 210 and the second color filter pattern 220. The white light beam W1 and a portion of the white light beam W2 with a larger light-emitting angle can be absorbed by the black matrix BM between the first color filter pattern 210 and the second color filter pattern 220, so as to prevent the white light beam W1 from irradiating the second color filter pattern 220 and the white light beam W2 from irradiating the first color filter pattern 210, thereby generating an erroneous display brightness. However, the light absorption of the black matrix BM reduces the amount of light emitted from the display panel, and further reduces the display luminance of the display panel.

With continued reference to fig. 4A, in the embodiment of the invention, since the light-transmitting region 300 is located between the first color filter pattern 210 and the second color filter pattern 220, the portion of the display substrate 10 that is irradiated by the white beamlets W1 and W2 irradiating the first color filter pattern 210 and the second color filter pattern 220 and irradiating the light-emitting side of the display panel 1 to transmit more white light to improve the display brightness of the display panel 1, on the other hand, the portion of the white beamlet W1 that is not irradiated by the first color filter pattern 210 does not irradiate the adjacent second color filter pattern 220 due to the existence of the light-transmitting region 300, the portion of the white beamlet W2 that is not irradiated by the second color filter pattern 210 does not irradiate the adjacent first color filter pattern 210, thereby preventing the second color filter pattern 220 from being irradiated by the white beamlet W1, and the first color filter pattern 210 from generating an erroneous display brightness through the irradiation of the white beamlet W2, the problem of color shift in the display panel 1 is avoided.

In the above embodiment, the shape and size of the light-transmitting region 300 between the adjacent first color filter pattern 210 and the second color filter pattern 220 can be adjusted, and the specific form thereof can be designed as required.

In some embodiments, referring to fig. 2A and 2B, the plurality of color filter patterns 200 further includes a third color filter pattern 230, and a light transmission color of the third color filter pattern 230 is different from both light transmission colors of the first color filter pattern 210 and the second color filter pattern 220, that is, a color of monochromatic light transmitted by the third color filter pattern 230 is different from a color of monochromatic light transmitted by the first color filter pattern 210 and the second color filter pattern 220. Illustratively, the color filter layer 20 includes color filter patterns of three transmission colors: the red filter pattern R, the green filter pattern G, and the blue filter pattern B, the first color filter pattern 210, the second color filter pattern 220, and the third color filter pattern 230 may correspond to one of the red filter pattern R, the green filter pattern G, and the blue filter pattern B, respectively. For example, the first color filter pattern 210 is a red filter pattern R, the second color filter pattern 220 is a green filter pattern G, and the third color filter pattern 230 is a blue filter pattern B. Of course, the above correspondence relationship is only illustrative, and does not set any limit to the embodiment of the present invention.

For example, referring to fig. 5, three color filter patterns (a first color filter pattern 210, a second color filter pattern 220, and a third color filter pattern 230) in the color filter layer 2 may be disposed at intervals. For example, the three color filter patterns may constitute a triangular (Delta) distribution. The Delta distribution means that a line connecting geometric centers of gravity of a first color filter pattern 210, a second color filter pattern 220 and a third color filter pattern 230 which are closest to each other forms a triangle. In the Delta distribution, every six color filter patterns constitute a minimum repeating unit U. One minimum repeating unit U is repeatedly arranged in both the row direction and the column direction, forming a Delta distribution.

In each of the color filter patterns distributed in Delta in the color filter layer 20, the transmission color of each adjacent two color filter patterns is different. For example, there may be a plurality of color filter patterns adjacent to one color filter pattern, for example, six color filter patterns adjacent to one first color filter pattern 210, for one first color filter pattern 210, the color filter patterns distributed around the first color filter pattern 210 and closest to the first color filter pattern 210 are three second color filter patterns 220 and three third color filter patterns 230, and the three second color filter patterns 220 and the three third color filter patterns 230 are spaced around the first color filter pattern 210, such that the color filter pattern adjacent to the first color filter pattern 210 is either the second color filter pattern 220 or the third color filter pattern 230. Similarly, in the Delta distribution, the color filter patterns adjacent to one second color filter pattern 220 are the first color filter pattern 210 and the third color filter pattern 230, and the color filter patterns adjacent to one third color filter pattern 230 are the first color filter pattern 210 and the second color filter pattern 220.

The light-transmitting area 300 is also located between the third color filter pattern 230 and at least one of the first color filter pattern 210 and the second color filter pattern 220, that is, the light-transmitting area 300 may also be located between the first color filter pattern 210 and the third color filter pattern 230, or between the second color filter pattern 220 and the third color filter pattern 230, or both between the first color filter pattern 210 and the third color filter pattern 230 and between the second color filter pattern 220 and the third color filter pattern 230.

Exemplarily, as shown in fig. 5, the light transmission region 300 is disposed between every adjacent two color filter patterns in the display panel 1. Wherein the width of the portion of the transparent region 300 between the respective color filter patterns 200 may be different. For example, referring to fig. 6, the transparent region 310 between the first color filter pattern 210 and the second color filter pattern 220 is a first width d1, the transparent region 320 between the first color filter pattern 210 and the third color filter pattern 230 is a second width d2, the transparent region 330 between the second color filter pattern 220 and the third color filter pattern 230 is a third width d3, and the first width d1, the second width d2 and the third width d3 are widths that are not equal to each other, and specific values thereof may be designed according to the type and degree of color shift in the display panel 1. It should be noted that the first width d1, the second width d2, and the third width d3 should be understood as an average width between edges of two adjacent color filter patterns.

In the Delta distribution of the color filter patterns, because the light transmission colors of every two adjacent color filter patterns are different, and the light transmission area is positioned between any two adjacent color filter patterns, the color cast problem caused by the generation of wrong display brightness in the display panel 1 can be avoided by the specific arrangement of the first width, the second width and the third width.

In some embodiments, referring to fig. 5, the light-transmitting area 300 is disposed around a circumference of at least one color filter pattern 200 in the color filter layer 20. Illustratively, the transparent region 300a is disposed around the edge of one color filter pattern 200a, and in the case that the transparent region 300a is disposed around one color filter pattern 200a for one circle, a plurality of color filter patterns 200 adjacent to the color filter pattern 200a may not be irradiated by white photon beams irradiating the color filter pattern 200a due to the separation of the transparent region 300a, thereby generating an erroneous display luminance.

Further, when the light-transmitting region 300 is disposed around a circumference of each of the color filter patterns 200 in the color filter layer 20, the light-transmitting region 300 is located between every two adjacent color filter patterns 200. Then, by designing the width of the light-transmitting region 300 between the adjacent color filter patterns 200, one color filter pattern in the display panel can be irradiated by only one white beamlet, and the color shift problem caused by irradiation of the adjacent white beamlets can be completely avoided.

In some embodiments, with continued reference to fig. 5, the width d of the portion of the light-transmitting region 300 between two adjacent color filter patterns 200 is equal everywhere. In some embodiments, d is in the range of 0.2-0.4 μm. Illustratively, referring to fig. 6, a portion 310 of the light-transmitting region between the first color filter pattern 210 and the second color filter pattern 220 includes an edge 301 and an edge 302, and the edge 301 is disposed parallel to the edge 302 with a distance d1 therebetween. For example, an edge 301 of the light-transmitting region 300 coincides with one edge 211 of the first color filter pattern 210, and an edge 302 of the light-transmitting region 300 coincides with one edge 221 of the second color filter pattern 220.

In some embodiments, referring to fig. 2A and 2B, the display panel 1 further includes a transparent part 30, the transparent part 30 allows white light to pass through, and the transparent part 30 is disposed at the light-transmitting region 300. Illustratively, the transparent part 30 is filled between at least two adjacent (e.g., every adjacent two) color filter patterns 200. Illustratively, the edge of the transparent part 30 coincides with the edge of the light-transmitting area 300, or the edge of the transparent part 30 is located inside the edge of the light-transmitting area 300.

In some embodiments, the material of the transparent part 30 is an organic polymer, for example, the material of the transparent part 30 may be a resin. For example, after a plurality of color filter patterns 200 in the color filter layer 20 are formed, a transparent material may be filled between two adjacent color filter patterns 200 to form the transparent part 30. For example, the thickness of the transparent part 30 is equal to the thickness of the color filter pattern 200. In the case where the display panel 1 includes the transparent part 30 and the thickness of the transparent part 30 is equal to the thickness of the color filter pattern 200, the light exit side of the color filter layer 20 can be made more flat.

In some embodiments, referring to fig. 7 and 10, the display substrate 10 includes a driving backplane 11 and a plurality of light emitting devices E, for example, the display substrate 10 includes a driving backplane 11 and a light emitting device layer 12, the light emitting device layer 12 is located on a side of the driving backplane 11 close to the color filter layer 20, the light emitting device layer 12 includes a plurality of light emitting devices E, and the plurality of light emitting devices E in the display substrate 10 may be located between the driving backplane 11 and the color filter layer 20.

The driving backplane 11 comprises a plurality of pixel driving lines D, and one pixel driving circuit D in the driving backplane 11 is coupled with one light emitting device E in the light emitting device layer 12 to form one sub-pixel P. Wherein the pixel driving circuit D is configured to drive the light emitting device E to emit light, and to control the light emission luminance of the light emitting device E according to the received data signal. Illustratively, referring to fig. 8, the plurality of pixel driving circuits D in the display panel 1 may be arranged in an array. For example, the plurality of pixel driving circuits D are arranged in a plurality of rows in a column direction, the arrangement direction of each row of pixel driving circuits being the row direction in fig. 3, wherein the column direction is perpendicular to the row direction. The row and column directions in fig. 8 are by way of example only, and for example, the two may be interchanged.

The embodiment of the present disclosure does not limit the specific structure of the pixel driving circuit D, and can be designed according to actual situations. Illustratively, the pixel driving circuit D may be composed of an electronic device such as a Transistor (Transistor, abbreviated as T), a capacitor (capacitor, abbreviated as C), and the like. For example, the pixel driving circuit D may include two transistors (one switching transistor and one driving transistor) and one capacitor, constituting a 2T1C structure; of course, the pixel driving circuit D may further include more than two transistors (a plurality of switching transistors and one driving transistor) and at least one capacitor, for example, the pixel driving circuit D may include one capacitor and three transistors, forming a 3T1C structure.

The light emitting device E emits light under the drive of the pixel driving circuit D. Exemplarily, referring to fig. 9A and 9B, the light emitting device E in the light emitting device layer 12 may be a multilayer thin film structure, and the light emitting device E includes a first electrode, a second electrode, and a light emitting function layer between the first electrode and the second electrode. The first electrode may be an anode 121 and the second electrode may be a cathode 126, or the first electrode may be the cathode 126 and the second electrode may be the anode 121. The light emitting function Layer may include, for example, a light emitting Layer 123, a Hole Transporting Layer (HTL) 122a between the light emitting Layer 123 and the anode 121, and an Electron Transporting Layer (ETL) 124a between the light emitting Layer 123 and the cathode 126. Of course, in some embodiments, a Hole Injection Layer (HIL) 122b may be further disposed between the Hole transport Layer 122a and the anode 121, and an Electron Injection Layer (EIL) 124b may be disposed between the electron transport Layer 124a and the cathode 126.

Exemplarily, the anode 121 may be formed of, for example, a transparent conductive material having a high work function, and an electrode material thereof may include Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Indium Gallium Oxide (IGO), Gallium Zinc Oxide (GZO), zinc oxide (ZnO), indium oxide (In2O3), Aluminum Zinc Oxide (AZO), a carbon nanotube, and the like; the cathode 126 may be formed of a material having high conductivity and low work function, and an electrode material thereof may include an alloy such as magnesium aluminum alloy (MgAl) and lithium aluminum alloy (LiAl) or a simple metal such as magnesium (Mg), aluminum (Al), lithium (Li), and silver (Ag). The material of the light emitting layer 123 may be selected according to the color of light emitted therefrom. For example, the material of the light emitting layer 123 includes a fluorescent light emitting material or a phosphorescent light emitting material. For another example, the light-emitting layer 123 may be a doped system in which a dopant is mixed with a host light-emitting material to obtain a usable light-emitting material. For example, as the host light-emitting material, a metal compound material, a derivative of anthracene, an aromatic diamine compound, a triphenylamine compound, an aromatic triamine compound, a biphenyldiamine derivative, a triarylamine polymer, or the like can be used.

Also exemplarily, referring to fig. 9B, the light emitting device E may be a Tandem type (or Tandem type) light emitting device, e.g., a Tandem OLED device, one Tandem type light emitting device E including at least two light emitting units, e.g., including a first light emitting unit EL1 and a second light emitting unit EL2, wherein one light emitting unit includes a plurality of light emitting function layers. The tandem type light emitting device E further includes a Charge Generation Layer (CGL) 125, exemplarily, the Charge Generation Layer 125 is positioned between the first light emitting unit EL1 and the second light emitting unit EL2, the Charge Generation Layer 125 may include an n-type Charge Generation Layer 125n and a p-type Charge Generation Layer 125p, and the n-type Charge Generation Layer 125n and the p-type Charge Generation Layer 125p may be in direct contact with each other to form an NP junction. The NP junction is capable of concurrently (e.g., simultaneously) generating electrons and holes in the n-type charge generation layer 125n and the p-type charge generation layer 125 p. For example, the generated electrons are transported to the second light emitting unit EL2 through the n-type charge generation layer 125n, and the generated holes are transported to the first light emitting unit EL1 through the p-type charge generation layer 125 p.

The charge generation layer 125 may be formed by doping an n-type material and/or a p-type material into an organic material. For example, the n-type charge generation layer 125n may be formed by doping an n-type material into an organic material to facilitate electron supply, and the p-type charge generation layer 125p may be formed by doping a p-type material into an organic material to facilitate hole supply.

Referring to fig. 7, one light emitting device E corresponds to one color filter pattern 200, and an orthogonal projection ES of the light emitting device E on the color filter layer 20 has an overlapping region with the corresponding color filter pattern 200. Here, the orthographic projection ES of the light-emitting device E on the color filter layer 20 refers to an orthographic projection of the light-emitting layer of the light-emitting device E on the color filter layer 20. Illustratively, an orthographic projection ES of the light emitting device E on the color filter layer 20 is located within an edge of the color filter pattern 200 corresponding thereto, so that light emitted by the light emitting device E can be irradiated on the color filter pattern 200. In addition, since the light emitting device E has a certain distance h from the color filter layer 200, even if the area of the light emitting layer of the light emitting device E is smaller than the area of the color filter layer 200, for example, the orthographic projection of the light emitting device E on the color filter layer 20 is located within the color filter layer 200 corresponding to the light emitting device E, the light emitted by the light emitting device E can illuminate the corresponding color filter layer completely, and even can illuminate the transparent area 300 or the transparent portion 30 around the color filter layer 200.

In some embodiments, for example, referring to fig. 10, the cathodes of the light emitting devices E in the light emitting device layer 12 may be connected to each other to form an entire layer structure (cathode layer 126). As another example, in the case where the light emitting colors of the respective light emitting devices E in the light emitting device layer 12 are the same, the light emitting function layers, such as the light emitting layer 123, in the respective light emitting devices E may be connected to each other to form an entire layer structure. In this case, the orthographic projection of one light emitting device E on the color filter layer 20 is the orthographic projection of the anode in the light emitting device E on the color filter layer 20.

In some embodiments, referring to fig. 10, the driving back plate 11 includes a silicon substrate 110 and at least one pixel driving circuit D disposed on the silicon substrate 110, for example, the silicon substrate 110 may be single crystal silicon, and one pixel driving circuit D in the driving back plate 11 is coupled with one light emitting device E. In case the driving backplane 11 comprises a silicon substrate 110, the pixel driving circuits D in the driving backplane 11 may be CMOS pixel driving circuits.

Illustratively, referring to fig. 11, a CMOS driver circuit D includes at least one N-metal oxide semiconductor (NMOS) transistor and at least one P-metal oxide semiconductor (PMOS) transistor. Here, fig. 11 illustrates the structure of the CMOS pixel driving circuit D by taking one CMOS pixel driving circuit D including one NMOS transistor and one PMOS transistor as an example.

In the PMOS transistor, a doped region is formed by forming an N-well (N-well) on the silicon substrate 110, then implanting P + ions into the formed N-well, and a source Ds and a drain Dd of the PMOS transistor are formed at positions of one side of the silicon substrate 110 corresponding to the doped region. In the NMOS transistor, a doped region is formed by forming a P well (P-well) on the silicon substrate 110, then implanting N + ions into the formed P well, and a source Ds and a drain Dd of the NMOS transistor are formed at positions of one side of the silicon substrate 110 corresponding to the doped region.

The PMOS transistor and the NMOS transistor further include an oxide layer Do and a gate Dg. The oxide layer Do is located on the surface of the silicon substrate 110, and is located on the same side as the source Ds and the drain Dd of the transistor, for example, the thickness of the oxide layer Do, the thickness of the source Ds, and the thickness of the drain Dd are the same. The gate Dg is located on a side of the oxide layer Do away from the silicon substrate 110, and the material of the gate Dg may be polysilicon, for example.

In addition, the CMOS pixel driving circuit D further includes a first metal layer 111 and a second metal layer 112, the first metal layer 111 is located on a side of the gate Dg away from the silicon substrate 110, and is used for coupling an NMOS transistor and a PMOS transistor. It is noted that a plurality of first metal layers 111 may be included in one CMOS pixel driving circuit D, and each first metal layer 111 couples one NMOS transistor and one PMOS transistor. The second metal layer 112 is located on a side of the first metal layer 111 away from the silicon substrate 110 for coupling the plurality of first metal layers 111.

Referring to fig. 7 and 10, in the display panel 1, the display panel 1 includes a first planarization layer 41, wherein the first planarization layer 41 is located between the display substrate 10 and the color filter layer 20.

Illustratively, referring to fig. 7, the first planarization layer 41 is a transparent substrate, the color filter layer 20 is formed on one side of the first planarization layer 41, for example, the first planarization layer 41 and the color filter layer 20 disposed thereon form color filter elements, and one color filter element and one display substrate 10 may be assembled together to form the display panel 1.

Further illustratively, referring to fig. 10, the first planarization layer 41 is an encapsulation layer formed on the surface of the light emitting device layer 12, wherein the encapsulation layer serves to planarize and protect the display substrate 10. The color filter layer 20 is a thin film formed on the side of the first planarization layer 41 remote from the driving backplane 11.

In some embodiments, referring to fig. 7 and 10, the display panel 1 further includes a lens layer 50, the lens layer 50 includes a plurality of microlenses 500, exemplarily, one microlens 500 corresponds to one light emitting device E, for example, a forward projection of one microlens 500 on the color filter layer 20 has an overlapping region with a forward projection of one light emitting device E on the color filter layer 20, and the microlens 500 is configured to converge light emitted by the light emitting device E corresponding thereto to increase the light emitting brightness of the light emitting device E. The lens layer 50 is disposed on a side of the color filter layer 20 away from the display substrate 10, and exemplarily, one microlens 500 in the lens layer 50 also corresponds to one color filter pattern 200 in the color filter layer 20, for example, an orthographic projection of one microlens 500, one light emitting device E and one color filter pattern 200 in the color filter layer 20 has an area overlapping each other, and the microlens 500 can collect monochromatic light emitted from the color filter pattern 200 corresponding thereto.

In the above embodiments, the microlenses 500 in the lens layer 50 are convex lenses, for example, the microlenses 500 are hemispherical in shape. Illustratively, the microlens 500 may be formed using a baking process. In some embodiments, the material forming the microlens 500 is the same as the material forming the transparent part 30.

Further, referring to fig. 7 and 11, a second planarization layer 42 may be further formed between the lens layer 50 and the color filter layer 20, and the microlenses 500 in the lens layer 50 are disposed on a side of the second planarization layer 42 away from the display substrate 10. In the case where the display panel 1 includes the second planarization layer 42, the height of each microlens 500 in the lens layer 50 can be made more uniform.

In some embodiments, with continued reference to fig. 7 and 11, the display panel 1 further comprises a protective layer 60, the protective layer 60 is disposed on a side of the lens layer 50 away from the display substrate 10, and a refractive index of the protective layer 60 is less than a refractive index of the lens layer 50. The protection layer 60 may serve as a planarization function, and the material of the protection layer 60 may be, for example, silicon oxide.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (13)

1. A display panel, comprising:

a display substrate configured to emit white light;

the colorful filter layer, set up in display substrate's light-emitting side, the colorful filter layer includes a plurality of colorful filter pattern, a plurality of colorful filter pattern include: the first color filter pattern and the second color filter pattern are adjacent and have different light transmission colors;

the color filter layer is provided with a light transmitting area, white light emitted by the display substrate can be emitted through the light transmitting area, and the light transmitting area is at least positioned between the first color filter pattern and the second color filter pattern.

2. The display panel according to claim 1,

the plurality of color filter patterns further includes: a third color filter pattern, wherein the light transmission color of the third color filter pattern is different from the light transmission color of the first color filter pattern and the second color filter pattern;

the light-transmitting region is also located between the third color filter pattern and at least one of the first color filter pattern and the second color filter pattern.

3. The display panel according to claim 1,

the light-transmitting area is arranged around the periphery of at least one color filter pattern in the plurality of color filter patterns.

4. The display panel according to claim 1,

the width of the part of the light-transmitting region between two adjacent color filter patterns is equal everywhere.

5. The display panel according to claim 4,

the width is 0.2-0.4 μm.

6. The display panel according to claim 1, further comprising:

a transparent part allowing white light to pass therethrough; the transparent part is arranged in the light-transmitting area.

7. The display panel according to claim 6,

the material of the transparent part is organic polymer.

8. The display panel according to any one of claims 1 to 7,

the display substrate comprises a driving back plate and a plurality of light-emitting devices, wherein the plurality of light-emitting devices are positioned between the driving back plate and the color filter layer;

and the orthographic projection of the light-emitting device on the color filter layer and the color film pattern have an overlapping region.

9. The display panel according to claim 8,

the driving back plate comprises a silicon substrate and at least one pixel driving circuit arranged on the silicon substrate, wherein one pixel driving circuit is coupled with one light emitting device.

10. The display panel according to claim 9, further comprising:

and the lens layer is arranged on one side of the color filter layer far away from the display substrate and comprises a plurality of micro lenses, and the orthographic projection of one micro lens on the color filter layer and the orthographic projection of one light-emitting device on the color filter layer have an overlapping area.

11. The display panel according to claim 10,

in a case where the display panel includes a transparent part, a material of the lens layer is the same as a material of the transparent part.

12. The display panel according to claim 11, further comprising:

the protective layer is arranged on one side, far away from the display substrate, of the lens layer;

the protective layer has a refractive index less than a refractive index of the lens layer.

13. A display device, comprising:

the display panel of any one of claims 1 to 12.

Images