Patent ID: 12207521

DETAILED DESCRIPTION OF EMBODIMENTS

In order to make the purposes, technical solutions, and effects of the application more clear and explicit, the application is further described in detail below with reference to the attached drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the application and are not used to limit the application.

As shown inFIG.1, an embodiment of the present application provides a display panel100with a display area101and a non-display area102. The display area101is used to arrange pixels and pixel driving circuits to achieve light emission, and the non-display area102is used to configure peripheral circuits to provide various signals for the pixel driving circuits to achieve light emission control of the pixels. The display panel100may be an OLED display panel.

As shown inFIG.2, the display panel100includes a light-emitting unit2and a color filter film3located on the light-emitting unit2. The light-emitting unit2is located in the display area102, and the color filter film3is at least located in the display area102.

The light-emitting unit2includes a first sub-light-emitting unit21, a second sub-light-emitting unit22, and a third sub-light-emitting unit23adjacent to each other. A light emission color of the first sub-light-emitting unit21, a light emission color of the second sub-light-emitting unit22and a light emission color of the third sub-light-emitting unit23are all different. In some embodiments, the first sub-light-emitting unit21, the second sub-light-emitting unit22, and the third sub-light-emitting unit23include a red organic light-emitting material210, a green organic light-emitting material220, and a blue organic light-emitting material230, respectively, which are used for being excited by a current between a cathode213and an anode212to emit light with a corresponding color. A light-emitting area of the red organic light-emitting material210is greater than a light-emitting area of the green organic light-emitting material220, such that a light-emitting area of the first sub-light-emitting unit21is greater than a light-emitting area of the second sub-light-emitting unit22, and a light-emitting area of the blue organic light-emitting material230is greater than the light-emitting area of the red organic light-emitting material210, such that a light-emitting area of the third sub-light-emitting unit23is greater than the light-emitting area of the first sub-light-emitting unit21.

The color filter film3includes a first color resist block31, a second color resist block32and a third color resist block33adjacent to each other. The first color resist block31is located on the first sub-light-emitting unit21, the second color resist block32is located on the second sub-light-emitting unit22, and the third color resist block33is located on the third sub-light-emitting unit23. The color of the color resist block is the same as the color of light of the corresponding sub-pixel. A thickness of the first color resist block31is different from at least one of a thickness of the second color resist block32and a thickness of the third color resist block33. For example, the thickness of the first color resist block31may be equal to the thickness of the third color resist block33, and both may be greater than the thickness of the second color resist block32, so that a transmittance of the first color resist block31is the smallest of the transmittance of the first color resist block31, a transmittance of the second color resist block32and a transmittance of the third color resist block33.

In the display panel100provided by the embodiments of the present application, the thickness of the first color resist block31is configured to be different from at least one of the thickness of the second color resist block32and the thickness of the third color resist block33, so that the transmittance of the first color resist block31is different from at least one of the transmittance of the second color resist block32and the transmittance of the third color resist block33. It is a breakthrough in the conventional design that the conventional design configures the transmittances of the first color resist block31, the second color resist block32, and the third color resist block33to be the same. Moreover, it improves the phenomenon that lights with a same transmittance tend to diffract and interfere with each other at the black matrix35, such that it can balance characteristics of the large viewing angle, holographic color hue and color separation, and improve the optical characteristics of the display panel100.

In some embodiments, the thickness of the first color resist block31, the thickness of the second color resist block32, and the thickness of the third color resist block33are all in a range of 2-4 microns, so that the transmittance of the first color resist block31, the second color resist block32, and the third color resist block33can be controlled in a range of 50%-65%. Furthermore, after the thickness of the first color resist block31, the thickness of the second color resist block32, and the thickness of the third color resist block33are arranged in a descending order, the difference between two adjacent color resist blocks does not exceed 1 micron, such that the transmittance of the first color resist block31, the second color resist block32, and the third color resist block33do not change too much. Therefore, the display panel100has a better display effect.

In some embodiments, the first color resist block31includes a red photoresist material with a thickness of 3.5 microns, and a transmittance of 56%. The second color resist block32includes a green photoresist material with a thickness of 3 microns, and a transmittance between 59%-60%. The third color resist block33includes a blue photoresist material with a thickness of 3.5 microns, and a transmittance between 59%-60%. As shown inFIG.4b, in the light emitted by the improved display panel100, the human eye cannot see the peripheral red light.FIG.4ais an optical effect diagram of a display panel in which transmittances of color resist blocks are configured to same in the conventional art, it can be clearly seen a peripheral red light R1. It can be concluded that a peripheral red light of the display panel of the embodiments of the present application is suppressed and the color separation phenomenon is improved.

Referring toFIGS.3and5, in some embodiments, in order to prevent the lights of two adjacent sub-pixels from interfering with each other, the color filter film3includes a black matrix35, the black matrix35is provided with a plurality of apertures, and the first color resist block31, the second color resist block32and the third color resist block33are at least partially located in a corresponding aperture. An area of the third color resist block33is greater than an area of the first color resist block31, and the area of the first color resist block31is greater than an area of the second color resist block32. A plurality of second color resist blocks32are arranged along a row direction and a column direction, and centers of four second color resist blocks32are used as vertices to enclose a virtual rectangle. Centers of each first color resist block31and each third color resist block33is located at a center of a corresponding virtual rectangle. In the row direction and the column direction, the first color resist blocks31, and the third color resist blocks33are arranged at intervals.

In some embodiments, because the light emitted from an edge of the color resist block tends to diffract at the black matrix35, and thus aggravates the color separation, reducing an amount of light emitted from the edge of the color resist block can improve the color separation phenomenon. Specifically, referring toFIG.5, a thickness of an edge of the first color resist block31is greater than a thickness of a center of the first color resist block31, which can reduce the light transmittance of the edge of the first color resist block31.

In some embodiments, because the light emitted from the color resist block tends to diffract at the black matrix35, and thus aggravate the color separation, reducing an amount of light emitted from the color resist block can improve the color separation phenomenon. Specifically, referring toFIG.5, a portion of the black matrix35close to an edge of the first color resist block31is provided with a first absorbing material36or a first scattering material37to absorb or scatter a color light corresponding to a color of the first color resist block31and a color of the first sub-light-emitting unit21. The scattering material may include acrylic particles or resin particles. The light absorbing material may include a resin material or a metal oxide material such as molybdenum oxide and titanium dioxide.

In some embodiments, because the light emitted from the color resist block tends to diffract at the black matrix35, and thus aggravate the color separation. Therefore, making as much light as possible emitted vertically from the color resist block can improve the color separation phenomenon. Specifically, referring toFIG.5, the display panel100further includes a lens structure8, the lens structure8includes a first lens, a second lens, and a third lens. The first lens is located between the first color resist block31and the first sub-light-emitting unit21, the second lens is located between the second color resist block32and the second sub-light-emitting unit22, and the third lens is located between the third color resist block33and the third sub-light-emitting unit23. A convergence of the first lens faces toward the first color resist block31, a convergence of the second lens faces toward the second color resist block32, and a convergence of the third lens faces toward the first color resist block31.

Referring toFIG.2, in some embodiments, the display panel100may further include an array substrate5, an encapsulation layer6, and a cover plate7.

The array substrate5includes a substrate51, and a thin-film transistor (TFT) layer52located on the substrate51. The thin-film transistor layer52includes a plurality of thin-film transistors electrically connected to the anode212, to control the light emissions of the first sub-light-emitting unit21, the second sub-light-emitting unit22and the third sub-light-emitting unit23. In the present embodiment, the material of the substrate51may be polyimide.

The encapsulation layer6includes a first inorganic layer, an organic layer, and a second inorganic layer stacked in sequence. The first inorganic layer, the organic layer, and the second inorganic layer are located on the first sub-light-emitting unit21, the second sub-light-emitting unit22, and the third sub-light-emitting unit23to achieve the encapsulation of the first sub-light-emitting unit21, the second sub-light-emitting unit22and the third sub-light-emitting unit23.

The cover plate7is adhered to the color filter film3via an optical adhesive70to achieve the protection of the color filter film3. Material of the cover plate7may include a glass or a flexible material.

The embodiments of the present application also provide a color filter film3as described above.

The embodiments of the present application also provide a display device, including the display panel100as described above. The display device may be fixed terminals, such as televisions and desktop computers, mobile terminals, such as smartphones and tablet computers, or wearable devices, such as smartwatches, virtual reality devices, and augmented reality devices.

Specific examples in this description are used to explain the principles and implementations of the application, and the description of the above embodiments are only used to help understand the methods and core ideas of the application. Meanwhile, for those skilled in the art, there will be modifications in the specific implementations and the application scopes according to the concept of the application. In summary, the contents of the specification should not be understood as limitations on the application.