CROSS REFERENCE TO RELATED APPLICATIONS

This application claims the priority of a Chinese Patent Application No. 201910808773.5, filed on Aug. 29, 2019, titled “ORGANIC LIGHT EMITTING DIODE DISPLAY PANEL AND DISPLAY DEVICE”, the entire contents of which are incorporated herein by reference.

FIELD OF DISCLOSURE

The present disclosure relates to the field of display technologies, and in particular, to an organic light emitting diode display panel and a display device.

BACKGROUND

With a development of science and technology and an increase of people's requirements for products, flexible displays are more and more valued and favored by a market. In comparison with liquid crystal display panels, organic light emitting diode display panels have a structural advantage of being flexible displays. Therefore, major panel manufacturers have put more effort into a research and development of flexible organic light emitting diode displays.

A thickness of a display will have a greater impact on flexible characteristics of the display. The thinner the thickness of the display, the better it is to realize its flexible characteristics. Currently, in order to eliminate a reflection effect of a display screen on external light, a polarizer is provided on a display surface of the display screen. The polarizer is a composite film composed of multiple layers of organic materials. It includes at least one phase retardation layer, one linearly polarized light layer, and multiple protective films. Therefore, it has a large thickness, which is not conducive to a thin design of the display screen. In addition, the phase retardation layer in the currently polarizer have an integral structure. A retardation coefficient of the phase retardation layer of this integral structure cannot meet phase requirements of entire visible wavelengths. Therefore, some of light cannot be converted from a linearly polarized light to a circularly polarized light by the phase retardation layer. This part of the light cannot be extinction by a linearly polarized light layer after being reflected by a cathode, causing light leakage, which seriously reduces an anti-reflection ability of the display screen.

SUMMARY OF DISCLOSURE

In the prior art, a thickness of a polarizer is large, which is not conducive to achieving a thin and light design of a display screen. Also, a retardation coefficient of the phase retardation layer of this integral structure cannot meet phase requirements of entire visible wavelengths. Therefore, some of light cannot be converted from a linearly polarized light to a circularly polarized light by the phase retardation layer. This part of the light cannot be extinction by a linearly polarized light layer after being reflected by a cathode, causing light leakage, which seriously reduces an anti-reflection ability of the display screen.

In order to solve the above technical problems, technical solutions provided by the present disclosure are as follows.

The present disclosure provides an organic light emitting diode display panel, including a display substrate and a phase functional layer.

The display substrate includes a plurality of pixel units, and at least some of the pixel units have different colors.

The phase functional layer is disposed on a display surface of the display substrate and includes a plurality of phase retardation layers, each of the phase retardation layers is disposed corresponding to one of the pixel units, and the phase retardation layers are configured to convert light having a linearly polarized light to a circularly polarized light.

In the organic light emitting diode display panel of the present disclosure, the phase retardation layers are configured to retard a phase of the light passing therethrough by a quarter wavelength.

In the organic light emitting diode display panel of the present disclosure, thicknesses of the phase retardation layers corresponding to the pixel units of different colors are different.

In the organic light emitting diode display panel of the present disclosure, a thickness of one of the phase retardation layers is less than 10 micrometers.

In the organic light emitting diode display panel of the present disclosure, the phase functional layer further includes a first barrier disposed between two adjacent phase retardation layers, and the first barrier is configured to prevent light passing through one of the two adjacent phase retardation layers from entering another one of the two adjacent phase retardation layers.

In the organic light emitting diode display panel of the present disclosure, the first barrier is made of an opaque material, and a thickness of the first barrier is greater than a thickness of one of the phase retardation layers.

In the organic light emitting diode display panel of the present disclosure, the organic light emitting diode display panel further includes an optical functional layer disposed on the phase functional layer, the optical functional layer includes a plurality of polarizing units, each of the polarizing units is disposed corresponding to one of the pixel units, and each of the polarizing unit is configured to convert light passing therethrough into a linearly polarized light with a color the same as that of a corresponding pixel unit.

In the organic light emitting diode display panel of the present disclosure, each of the polarizing units includes a linearly polarized light layer disposed on the phase functional layer and a color filter layer disposed on the linearly polarized light layer, and the color filter layer is configured to filter light passing therethrough into monochromatic light with a color the same as that of a corresponding pixel unit, and the linearly polarized light layer is configured to convert light passing therethrough into the linearly polarized light.

In the organic light emitting diode display panel of the present disclosure, each of the polarizing units includes a color filter layer disposed on the phase functional layer and a linearly polarized light layer disposed on the color filter layer, and the color filter layer is configured to filter light passing therethrough into monochromatic light with a color the same as that of a corresponding pixel unit, and the linearly polarized light layer is configured to convert light passing therethrough into the linearly polarized light.

In the organic light emitting diode display panel of the present disclosure, the optical functional layer further includes a second barrier disposed between two adjacent polarizing units, and the second barrier is configured to prevent light passing through one of the two adjacent polarizing units from entering another one of the two adjacent polarizing units.

In the organic light emitting diode display panel of the present disclosure, the second barrier is made of an opaque material, and a thickness of the second barrier is greater than a thickness of one of the polarizing units.

In the organic light emitting diode display panel of the present disclosure, the display substrate includes a red pixel unit, a green pixel unit, and a blue pixel unit, and the phase functional layer includes a red phase retardation layer corresponding to the red pixel unit, a green phase retardation layer corresponding to the green pixel unit, and a blue phase retardation layer corresponding to the blue pixel unit.

In the organic light emitting diode display panel of the present disclosure, a thickness of the red phase retardation layer, a thickness of the green phase retardation layer, and a thickness of the blue phase retardation layer are different.

In the organic light emitting diode display panel of the present disclosure, the optical functional layer includes a red polarizing unit corresponding to the red pixel unit, a green polarizing unit corresponding to the green pixel unit, and a blue polarizing unit corresponding to the blue pixel unit.

In the organic light emitting diode display panel of the present disclosure, a thickness of the red polarizing unit, a thickness of the green polarizing unit, and a thickness of the blue polarizing unit are different.

In the organic light emitting diode display panel of the present disclosure, the organic light emitting diode display panel further includes a first planarization layer, a touch functional layer, a second planarization layer, and a cover plate. The first planarization layer is disposed on the phase functional layer, the touch functional layer is disposed between the first planarization layer and the optical functional layer, the second planarization layer is disposed on the optical functional layer, and the cover plate is disposed on the second planarization layer.

In the organic light emitting diode display panel of the present disclosure, the display substrate further includes a flexible substrate, an array layer disposed on the flexible substrate, and a thin film encapsulation layer disposed on the pixel units. The pixel units are disposed between the array layer and the thin film encapsulation layer.

The present disclosure also provides a display device, including an organic light emitting diode display panel. The organic light emitting diode display panel includes a display substrate and a phase functional layer.

The display substrate includes a plurality of pixel units, and at least some of the pixel units have different colors.

The phase functional layer is disposed on a display surface of the display substrate and includes a plurality of phase retardation layers. Each of the phase retardation layers is disposed corresponding to one of the pixel units, and the phase retardation layers are configured to convert light having a linearly polarized light to a circularly polarized light.

In the display device of the present disclosure, the organic light emitting diode display panel further includes an optical functional layer disposed on the phase functional layer, the optical functional layer includes a plurality of polarizing units, each of the polarizing units is disposed corresponding to one of the pixel units, and each of the polarizing unit is configured to convert light passing therethrough into a linearly polarized light with a color the same as that of a corresponding pixel unit.

In the display device of the present disclosure, the display substrate includes a red pixel unit, a green pixel unit, and a blue pixel unit.

The phase functional layer includes a red phase retardation layer corresponding to the red pixel unit, a green phase retardation layer corresponding to the green pixel unit, and a blue phase retardation layer corresponding to the blue pixel unit.

The optical functional layer includes a red polarizing unit corresponding to the red pixel unit, a green polarizing unit corresponding to the green pixel unit, and a blue polarizing unit corresponding to the blue pixel unit.

The present disclosure provides an organic light emitting diode display panel and a display device. By setting respectively phase retardation layer and polarizing unit on each pixel unit, it can achieve an extinction of incident light in a single pixel area, greatly reduce a probability of reflected light leakage, and improve an anti-reflective ability of the display panel. In comparison with a conventional polarizer structure, an extinction structure provided in embodiments of the present disclosure has a smaller thickness, which is beneficial to a realization of the thin and light design of the display panel and the display device.

