Display panel and display device

Abstract

Disclosed in embodiments of the present invention are a display panel and a display device. The display panel comprises a light-emitting layer having a plurality of light-emitting units, and an adjustment layer located on a light-emitting side of the light-emitting units, wherein the transmittance of a light adjustment layer for light having a wavelength greater than 450 nanometers emitted by the light-emitting units is greater than or equal to 80%, and the transmittance of the light adjustment layer for light having a wavelength smaller than or equal to 450 nanometers is smaller than or equal to 20%.

Description

Display panel and display device Technical Field

[0001] The present application relates to the field of display, and in particular to a display panel and a display device. Background Art

[0002] Organic Light-Emitting Diode (OLED) display panels offer a wide range of applications due to their self-luminescence, high brightness, high efficiency, low-voltage drive, wide viewing angle, high contrast, and high response. OLED display panels utilize the light emitted by organic light-emitting materials for display, and typically use filters to selectively filter specific light to enhance the display quality. However, existing filters, while transmitting light emitted by OLED display panels, cannot prevent short-wavelength ambient light from reaching the organic light-emitting materials. This causes the organic light-emitting materials to decompose under the irradiation of short-wavelength light, reducing the service life of the OLED display panel.

[0003] Therefore, a display panel and a display device are urgently needed to solve the above technical problems. SUMMARY OF THE INVENTION

[0004] The present invention provides a display panel and a display device, which can alleviate the technical problem that the current filter cannot transmit the light emitted by the display panel while blocking the short-wavelength light in the ambient light from irradiating the organic light-emitting material of the display panel, thereby reducing the service life of the display panel.

[0005] To solve the above problems, the technical solutions provided by this application are as follows:

[0006] The present invention provides a display panel, comprising:

[0007] a light-emitting layer comprising a plurality of light-emitting units;

[0008] a light regulating layer, located on the light emitting side of the light emitting unit;

[0009] The transmittance of the light regulating layer to light with a wavelength greater than 450 nanometers emitted by the light emitting unit is greater than or equal to 80%, and the transmittance of the light regulating layer to light with a wavelength less than or equal to 450 nanometers is less than or equal to 20%.

[0010] The present invention further provides a display device, including a display panel, wherein the display panel includes:

[0011] a light-emitting layer comprising a plurality of light-emitting units;

[0012] a light regulating layer, located on the light emitting side of the light emitting unit;

[0013] The transmittance of the light regulating layer to light with a wavelength greater than 450 nanometers emitted by the light emitting unit is greater than or equal to 80%, and the transmittance of the light regulating layer to light with a wavelength less than or equal to 450 nanometers is less than or equal to 20%. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic diagram of a first structure of a display panel provided by an embodiment of the present invention;

[0015] FIG2 is a schematic diagram of a second structure of a display panel provided by an embodiment of the present invention;

[0016] 3 is a schematic diagram of a first structure of a light regulation layer of a display panel provided by an embodiment of the present invention;

[0017] FIG4 is a schematic diagram of a second structure of a light regulation layer of a display panel provided by an embodiment of the present invention;

[0018] 5 is a schematic diagram of optical constants of TiO 2 used in a light regulation layer provided in an embodiment of the present invention;

[0019] 6 is a schematic diagram of optical constants of SiO 2 used in a light modulation layer provided in an embodiment of the present invention;

[0020] 7 is a schematic diagram of the light transmittance of light emitted by the second light-emitting sub-unit at a zero-degree viewing angle when the thickness of the spacer portion of the light-regulating layer provided by an embodiment of the present invention is 120 nm;

[0021] 8 is a schematic diagram showing how the transmittance and reflectance of light emitted by the second light-emitting sub-unit vary with the thickness of the spacer at a zero-degree viewing angle according to an embodiment of the present invention;

[0022] 9 is a schematic diagram of the far-field radiation spectrum of the second light-emitting sub-unit at a zero-degree viewing angle provided by an embodiment of the present invention;

[0023] FIG10 is a schematic diagram of optical constants of a conventional organic dye filter;

[0024] FIG11 is a schematic diagram of the transmittance and reflectance of light emitted by the second light-emitting sub-unit at a zero-degree viewing angle when a traditional organic dye filter is used.

[0025] FIG12 is a schematic diagram of the far-field radiation spectrum of the second light-emitting sub-unit at a zero-degree viewing angle when using a traditional organic dye filter and the light-regulating layer provided by an embodiment of the present invention;

[0026] FIG13 is a schematic structural diagram of a display device provided in an embodiment of the present invention. Modes for Carrying Out the Invention

[0027] The present application provides a display panel and a display device. To make the purpose, technical solution, and effects of the present application clearer and more explicit, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0028] Currently, the filter cannot transmit the light emitted by the display panel while blocking the short-wavelength light in the ambient light from reaching the organic light-emitting material of the display panel. There is a technical problem that the organic material decomposes and reduces the service life of the display panel.

[0029] 1 to 4 , an embodiment of the present invention provides a display panel 100, including:

[0030] The light-emitting layer 101 includes a plurality of light-emitting units 102;

[0031] The light regulating layer 103 is located on the light emitting side of the light emitting unit 102;

[0032] The transmittance of the light regulating layer 103 to the light with a wavelength greater than 450 nanometers emitted by the light emitting unit 102 is greater than or equal to 80%, and the transmittance of the light regulating layer 103 to the light with a wavelength less than or equal to 450 nanometers is less than or equal to 20%.

[0033] In an embodiment of the present invention, a light adjustment layer 103 is provided. While the light adjustment layer 103 allows light emitted by the light-emitting unit 102 to pass through, it reduces the amount of light less than or equal to 450 nanometers in the external ambient light that reaches the light-emitting unit 102, thereby reducing the decomposition of the organic light-emitting material in the light-emitting unit 102 and improving the service life of the display panel 100.

[0034] The technical solution of the present invention will now be described in conjunction with specific embodiments.

[0035] Referring to Figures 1 and 2, in this embodiment, the light adjustment layer 103 is located on the light-emitting side of the light-emitting unit 102, that is, the light adjustment layer 103 is located on the side of the light-emitting unit 102 that emits light, and the light emitted by the light-emitting unit 102 passes through the light adjustment layer 103 and then exits.

[0036] Please refer to Figure 2. In some embodiments, the display panel 100 also includes a substrate, the light-emitting layer 101 is located on one side of the substrate, and when the light emitted by the light-emitting unit 102 passes through the substrate and is emitted, the light adjustment layer 103 is located between the substrate and the light-emitting layer 101; when the light emitted by the light-emitting unit 102 is emitted in a direction away from the substrate, that is, when the substrate is located on the backlight side of the light-emitting layer 101, the light adjustment layer 103 is located on the side of the light-emitting layer 101 away from the substrate.

[0037] Referring to Figures 1 to 4 , the light regulating layer 103 includes a first light regulating portion 104 and a second light regulating portion 105. The first light regulating portion 104 is located on the side of the second light regulating portion 105 away from the light emitting layer 101. The transmittance of the first light regulating portion 104 for light with a wavelength less than or equal to 450 nanometers is lower than the transmittance of the second light regulating portion 105 for light with a wavelength less than or equal to 450 nanometers. The first light regulating portion 104 is located on the side of the second light regulating portion 105 away from the light emitting layer 101, i.e., it is closer to the external environment. The fact that the transmittance of the first light regulating portion 104 for light with a wavelength less than or equal to 450 nanometers is lower than the transmittance of the second light regulating portion 105 for light with a wavelength less than or equal to 450 nanometers helps prevent short-wavelength light from the external environment from entering the display panel 100, thereby improving the service life of the display panel 100.

[0038] In some embodiments, the transmittance of the light-regulating layer 103 for light with a wavelength less than or equal to 450 nanometers is less than or equal to 20%. For example, the transmittance can be 0%, 1%, 2%, 5%, 8%, 10%, 11%, 12%, 14%, 15%, 16%, 18%, etc. Furthermore, the transmittance of the light-regulating layer 103 for light with a wavelength less than or equal to 450 nanometers is less than or equal to 10%, which helps further reduce the amount of short-wavelength light in the external environment that enters the display panel 100, thereby increasing the service life of the display panel 100.

[0039] In some embodiments, the transmittance of the light adjustment layer 103 to the light emitted by the light-emitting unit 102 is greater than or equal to 80%. For example, it can be 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 92%, 95%, 96%, 98%, 100%, etc., so as to ensure the light output rate of the light emitted by the light-emitting unit 102.

[0040] Referring to Figures 3 and 4 , in some embodiments, the first light modulation portion 104 includes at least one first refractive index sublayer 106 and at least one second refractive index sublayer 107. The first refractive index sublayers 106 and the second refractive index sublayers 107 are alternately arranged along the direction from the light emitting layer 101 to the light modulation layer 103. The refractive index of the first refractive index sublayers 106 and the refractive index of the second refractive index sublayers 107 differ. The first light modulation portion 104 is composed of the first refractive index sublayers 106 and the second refractive index sublayers 107. In the direction from the light emitting layer 101 to the light modulation layer 103, the first refractive index sublayers 106 and the second refractive index sublayers 107, with different refractive indices, sequentially overlap, forming a Bragg reflector. This mirror allows light emitted by the light emitting unit 102 to be transmitted while specifically reducing the transmittance of short-wavelength light. The Bragg reflector is formed by using the first refractive index sublayer 106 and the second refractive index sublayer 107 , thereby avoiding organic dyes and the problems of poor film thickness uniformity and unstable performance caused by large and unevenly distributed organic dyes.

[0041] In some embodiments, the refractive index of the first refractive index sublayer 106 is greater than the refractive index of the second refractive index sublayer 107, or the refractive index of the first refractive index sublayer 106 is less than the refractive index of the second refractive index sublayer 107. Along the direction from the light emitting layer 101 to the light modulation layer 103, the one of the first refractive index sublayer 106 and the second refractive index sublayer 107 closest to the light emitting layer 101 can be the one with a higher refractive index between the first refractive index sublayer 106 and the second refractive index sublayer 107, or the one with a lower refractive index between the first refractive index sublayer 106 and the second refractive index sublayer 107.

[0042] 1 to 4 , in some embodiments, the refractive index of the layer closest to the light-emitting layer 101 among the multiple layers of the first light adjustment portion 104 is different from the refractive index of the layer farthest from the light-emitting layer 101. For example, if the layer closest to the light-emitting layer 101 among the multiple layers of the first light adjustment portion 104 is the layer with the lower refractive index between the first refractive index sub-layer 106 and the second refractive index sub-layer 107, then the layer farthest from the light-emitting layer 101 among the multiple layers of the first light adjustment portion 104 is the layer with the higher refractive index between the first refractive index sub-layer 106 and the second refractive index sub-layer 107.

[0043] Referring to Figures 1 to 4, in some embodiments, the number of first refractive index sublayers 106 in the first light adjustment portion 104 is greater than or equal to 1, for example, 2, 3, 4, 5, 6, etc. The number of second refractive index sublayers 107 in the first light adjustment portion 104 is greater than or equal to 1, for example, 2, 3, 4, 5, 6, etc. The sum of the number of first refractive index sublayers 106 and the number of second refractive index sublayers 107 in the first light adjustment portion 104 is an even number, for example, 2, 4, 6, 8, 10, 12, etc. The number of first refractive index sublayers 106 and the number of second refractive index sublayers 107 are the same. When the number of the first refractive index sublayer 106 is greater than 1 and the number of the second refractive index sublayer 107 is greater than 1, the alternating arrangement of multiple first refractive index sublayers 106 and multiple second refractive index sublayers 107 is more conducive to the first light adjustment part 104 maintaining the transmittance of the light emitted by the light-emitting unit 102 while specifically reducing the transmittance of short-wavelength light.

[0044] In some embodiments, when the number of first refractive index sublayers 106 is greater than 1, the thicknesses of different first refractive index sublayers 106 are the same or different. The thickness of each first refractive index sublayer 106 can be set according to the wavelength of light whose transmittance is specifically reduced. Specifically, the thickness of each first refractive index sublayer 106 is less than the wavelength of light whose transmittance is specifically reduced. For example, taking the wavelength of light whose transmittance is specifically reduced at 450 nanometers as an example, the thickness of each first refractive index sublayer 106 is less than 450 nanometers. When the number of second refractive index sublayers 107 is greater than 1, the thicknesses of different second refractive index sublayers 107 are the same or different. The thickness of each second refractive index sublayer 107 can be set according to the wavelength of light whose transmittance is specifically reduced. Specifically, the thickness of each second refractive index sublayer 107 is less than the wavelength of light whose transmittance is specifically reduced. For example, taking the wavelength of light whose transmittance is specifically reduced at 450 nanometers as an example, the thickness of each second refractive index sublayer 107 is less than 450 nanometers.

[0045] In some embodiments, the thickness of each first refractive index sublayer 106 may be greater than or equal to half the wavelength of the light whose transmittance is specifically reduced. For example, taking the light whose transmittance is specifically reduced at a wavelength of 450 nanometers as an example, the thickness of each first refractive index sublayer 106 is greater than or equal to 225 nanometers. Alternatively, the thickness of each first refractive index sublayer 106 may be less than half the wavelength of the light whose transmittance is specifically reduced. For example, taking the light whose transmittance is specifically reduced at a wavelength of 450 nanometers as an example, the thickness of each first refractive index sublayer 106 is less than 225 nanometers. The thickness of each second refractive index sublayer 107 may be greater than or equal to half the wavelength of the light whose transmittance is specifically reduced. For example, taking the light whose transmittance is specifically reduced at a wavelength of 450 nanometers as an example, the thickness of each second refractive index sublayer 107 is greater than or equal to 225 nanometers. Alternatively, the thickness of each second refractive index sublayer 107 can be less than half the wavelength of the light whose transmittance is specifically reduced. For example, taking the light whose transmittance is specifically reduced at a wavelength of 450 nanometers as an example, the thickness of each second refractive index sublayer 107 is less than 225 nanometers.

[0046] In some embodiments, the thickness of each first refractive index sublayer 106 may be greater than or equal to one-quarter of the wavelength of the light whose transmittance is specifically reduced. For example, taking the wavelength of the light whose transmittance is specifically reduced as 450 nanometers as an example, the thickness of each first refractive index sublayer 106 is greater than or equal to 112.5 nanometers. Alternatively, the thickness of each first refractive index sublayer 106 may be less than one-quarter of the wavelength of the light whose transmittance is specifically reduced. For example, taking the wavelength of the light whose transmittance is specifically reduced as 450 nanometers as an example, the thickness of each first refractive index sublayer 106 is less than 112.5 nanometers. The thickness of each second refractive index sublayer 107 may be greater than or equal to one-quarter of the wavelength of the light whose transmittance is specifically reduced. For example, taking the wavelength of the light whose transmittance is specifically reduced as 450 nanometers as an example, the thickness of each second refractive index sublayer 107 is greater than or equal to 112.5 nanometers. Alternatively, the thickness of each second refractive index sublayer 107 can be less than a quarter of the wavelength of the light whose transmittance is specifically reduced. For example, taking the light whose transmittance is specifically reduced at a wavelength of 450 nanometers as an example, the thickness of each second refractive index sublayer 107 is less than 112.5 nanometers.

[0047] In some embodiments, the thickness of each first refractive index sub-layer 106 and the thickness of each second refractive index sub-layer 107 can be adjusted according to the following formula and within a range smaller than the wavelength of light for specifically reducing transmittance:

[0048]

[0049] In which, d1 represents the theoretical thickness of the first refractive index sublayer 106 or the theoretical thickness of the second refractive index sublayer 107, λ1 represents the wavelength of light whose transmittance is specifically reduced by the first light adjustment part 104, and n1 represents the refractive index of the first refractive index sublayer 106 or the refractive index of the second refractive index sublayer 107.

[0050] Referring to Figures 1 to 4, in some embodiments, the second light modulation portion 105 includes at least one third refractive index sublayer 108 and at least one fourth refractive index sublayer 109. The third refractive index sublayers 108 and the fourth refractive index sublayers 109 are alternately arranged along the direction from the light emitting layer 101 to the light modulation layer 103. The refractive index of the third refractive index sublayer 108 differs from the refractive index of the fourth refractive index sublayer 109. The second light modulation portion 105 is composed of the third refractive index sublayers 108 and the fourth refractive index sublayers 109. Along the direction from the light emitting layer 101 to the light modulation layer 103, the third refractive index sublayers 108 and the fourth refractive index sublayers 109, with different refractive indices, sequentially overlap, forming a Bragg reflector. This reduces the transmittance of short-wavelength light while specifically improving the transmittance of light emitted by the light emitting unit 102. The use of the third refractive index sublayer 108 and the fourth refractive index sublayer 109 to form a Bragg reflector can avoid organic dyes, thereby avoiding the problems of poor film thickness uniformity and unstable performance caused by large and unevenly distributed organic dyes.

[0051] In some embodiments, the refractive index of the third refractive index sublayer 108 is greater than the refractive index of the fourth refractive index sublayer 109, or the refractive index of the third refractive index sublayer 108 is less than the refractive index of the fourth refractive index sublayer 109. Along the direction from the light-emitting layer 101 to the light-regulating layer 103, the one of the third refractive index sublayer 108 and the fourth refractive index sublayer 109 closest to the light-emitting layer 101 can be the one with a higher refractive index between the third refractive index sublayer 108 and the fourth refractive index sublayer 109, or the one with a lower refractive index between the third refractive index sublayer 108 and the fourth refractive index sublayer 109.

[0052] 1 to 4 , in some embodiments, the refractive index of the layer closest to the light-emitting layer 101 among the multiple film layers of the second light adjustment portion 105 is the same as the refractive index of the layer farthest from the light-emitting layer 101. For example, if the layer closest to the light-emitting layer 101 among the multiple film layers of the second light adjustment portion 105 is the layer with the higher refractive index between the third refractive index sub-layer 108 and the fourth refractive index sub-layer 109, the layer farthest from the light-emitting layer 101 among the multiple film layers of the second light adjustment portion 105 is also the layer with the higher refractive index between the third refractive index sub-layer 108 and the fourth refractive index sub-layer 109.

[0053] In some embodiments, the number of the third refractive index sublayers 108 in the second light adjustment portion 105 is greater than or equal to 1, for example, 2, 3, 4, 5, 6, etc. The number of the fourth refractive index sublayers 109 in the second light adjustment portion 105 is greater than or equal to 1, for example, 2, 3, 4, 5, 6, etc. The sum of the number of the third refractive index sublayers 108 and the number of the fourth refractive index sublayers 109 in the second light adjustment portion 105 can be an even number, for example, 2, 4, 6, 8, 10, 12, etc. The number of the third refractive index sublayers 108 and the number of the fourth refractive index sublayers 109 can be the same. When the number of the third refractive index sublayer 108 is greater than 1 and the number of the fourth refractive index sublayer 109 is greater than 1, the alternating arrangement of multiple third refractive index sublayers 108 and multiple fourth refractive index sublayers 109 is more conducive to the second light adjustment portion 105 reducing the transmittance of short-wavelength light while specifically improving the transmittance of the light emitted by the light-emitting unit 102.

[0054] In some embodiments, when the number of third refractive index sublayers 108 is greater than one, the thicknesses of different third refractive index sublayers 108 are the same or different. The thickness of each third refractive index sublayer 108 can be set based on the wavelength of light for which transmittance is to be specifically enhanced. Specifically, the thickness of each third refractive index sublayer 108 is less than the wavelength of the light for which transmittance is to be specifically enhanced. For example, taking the wavelength of light for which transmittance is to be specifically enhanced at 522 nanometers as an example, the thickness of each third refractive index sublayer 108 is less than 522 nanometers. When the number of fourth refractive index sublayers 109 is greater than one, the thicknesses of different fourth refractive index sublayers 109 are the same or different. The thickness of each fourth refractive index sublayer 109 can be set based on the wavelength of light for which transmittance is to be specifically enhanced. Specifically, the thickness of each fourth refractive index sublayer 109 is less than the wavelength of the light for which transmittance is to be specifically enhanced. For example, taking the wavelength of light for which transmittance is to be specifically enhanced at 522 nanometers as an example, the thickness of each fourth refractive index sublayer 109 is less than 522 nanometers.

[0055] In some embodiments, the thickness of each third refractive index sublayer 108 may be greater than or equal to half the wavelength of the light whose transmittance is specifically enhanced. For example, taking the light whose transmittance is specifically enhanced at a wavelength of 522 nanometers as an example, the thickness of each third refractive index sublayer 108 is greater than or equal to 261 nanometers. Alternatively, the thickness of each third refractive index sublayer 108 may be less than half the wavelength of the light whose transmittance is specifically enhanced. For example, taking the light whose transmittance is specifically enhanced at a wavelength of 522 nanometers as an example, the thickness of each third refractive index sublayer 108 is less than 261 nanometers. The thickness of each fourth refractive index sublayer 109 may be greater than or equal to half the wavelength of the light whose transmittance is specifically enhanced. For example, taking the light whose transmittance is specifically enhanced at a wavelength of 522 nanometers as an example, the thickness of each fourth refractive index sublayer 109 is greater than or equal to 261 nanometers. Alternatively, the thickness of each of the fourth refractive index sublayers 109 may be less than half the wavelength of the light whose transmittance is specifically improved. For example, taking the light whose transmittance is specifically improved with a wavelength of 522 nanometers as an example, the thickness of each of the fourth refractive index sublayers 109 is less than 261 nanometers.

[0056] In some embodiments, the thickness of each third refractive index sublayer 108 may be greater than or equal to one-quarter of the wavelength of the light for which transmittance is specifically enhanced. For example, taking the wavelength of the light for which transmittance is specifically enhanced to be 522 nanometers as an example, the thickness of each third refractive index sublayer 108 is greater than or equal to 130.5 nanometers. Alternatively, the thickness of each third refractive index sublayer 108 may be less than one-quarter of the wavelength of the light for which transmittance is specifically enhanced to be enhanced. For example, taking the wavelength of the light for which transmittance is specifically enhanced to be 522 nanometers as an example, the thickness of each third refractive index sublayer 108 is less than 130.5 nanometers. The thickness of each fourth refractive index sublayer 109 may be greater than or equal to one-quarter of the wavelength of the light for which transmittance is specifically enhanced to be enhanced. For example, taking the wavelength of the light for which transmittance is specifically enhanced to be 522 nanometers as an example, the thickness of each fourth refractive index sublayer 109 is greater than or equal to 130.5 nanometers. Alternatively, the thickness of each of the fourth refractive index sublayers 109 may be less than a quarter of the wavelength of the light whose transmittance is specifically improved. For example, taking the light whose transmittance is specifically improved with a wavelength of 522 nanometers as an example, the thickness of each of the fourth refractive index sublayers 109 is less than 130.5 nanometers.

[0057] In some embodiments, the thickness of each of the third refractive index sub-layers 108 and the thickness of each of the fourth refractive index sub-layers 109 can be adjusted according to the following formula and within a range smaller than the wavelength of light for which transmittance is specifically improved:

[0058]

[0059] Among them, d2 represents the theoretical thickness of the third refractive index sublayer 108 or the theoretical thickness of the fourth refractive index sublayer 109, λ2 represents the wavelength of light whose transmittance is specifically improved by the second light adjustment part 105, and n2 represents the refractive index of the third refractive index sublayer 108 or the refractive index of the fourth refractive index sublayer 109.

[0060] In some embodiments, the refractive index of the materials of the first refractive index sublayer 106, the second refractive index sublayer 107, the third refractive index sublayer 108, and the fourth refractive index sublayer 109 within the visible light wavelength range is greater than or equal to 90%, for example, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%, etc. Furthermore, the refractive index of the materials of the first refractive index sublayer 106, the second refractive index sublayer 107, the third refractive index sublayer 108, and the fourth refractive index sublayer 109 within the visible light wavelength range is greater than or equal to 92%. The visible light wavelength range refers to light with a wavelength range of 380 nanometers to 780 nanometers.

[0061] In some embodiments, the material with a higher refractive index in the first refractive index sub-layer 106 and the second refractive index sub-layer 107 has a better ability to block water and oxygen than the material with a lower refractive index in the first refractive index sub-layer 106 and the second refractive index sub-layer 107. Therefore, the total thickness of the material with a higher refractive index in the first light adjustment portion 104 of the first refractive index sub-layer 106 and the second refractive index sub-layer 107 is greater than the total thickness of the material with a lower refractive index in the first light adjustment portion 104 of the first refractive index sub-layer 106 and the second refractive index sub-layer 107. That is, the refractive index of the first refractive index sublayer 106 is greater than the refractive index of the second refractive index sublayer 107, and the thickness ratio of the first refractive index sublayer 106 in the first light adjustment portion 104 is greater than the thickness ratio of the second refractive index sublayer 107 in the first light adjustment portion 104; or, the refractive index of the first refractive index sublayer 106 is less than the refractive index of the second refractive index sublayer 107, and the thickness ratio of the first refractive index sublayer 106 in the first light adjustment portion 104 is less than the thickness ratio of the second refractive index sublayer 107 in the first light adjustment portion 104.

[0062] Similarly, the material with a higher refractive index in the third refractive index sub-layer 108 and the fourth refractive index sub-layer 109 has a better ability to block water and oxygen than the material with a lower refractive index in the third refractive index sub-layer 108 and the fourth refractive index sub-layer 109. Therefore, the total thickness of the material with a higher refractive index in the third refractive index sub-layer 108 and the fourth refractive index sub-layer 109 in the second light adjustment portion 105 is greater than the total thickness of the material with a lower refractive index in the third refractive index sub-layer 108 and the fourth refractive index sub-layer 109 in the second light adjustment portion 105. That is, the refractive index of the third refractive index sublayer 108 is greater than the refractive index of the fourth refractive index sublayer 109, and the thickness ratio of the third refractive index sublayer 108 in the second light adjustment portion 105 is greater than the thickness ratio of the fourth refractive index sublayer 109 in the second light adjustment portion 105; or, the refractive index of the third refractive index sublayer 108 is less than the refractive index of the fourth refractive index sublayer 109, and the thickness ratio of the third refractive index sublayer 108 in the second light adjustment portion 105 is less than the thickness ratio of the fourth refractive index sublayer 109 in the second light adjustment portion 105.

[0063] In some embodiments, the material with the higher refractive index in the first refractive index sub-layer 106 and the second refractive index sub-layer 107 can be selected from at least one of titanium (Ti) and zirconium (Zr) oxides, such as TiO2 and ZrO2. The material with the higher refractive index in the third refractive index sub-layer 108 and the fourth refractive index sub-layer 109 can be selected from at least one of titanium (Ti) and zirconium (Zr) oxides, such as at least one of TiO2 and ZrO2.

[0064] In some embodiments, the material of the lower refractive index in the first refractive index sub-layer 106 and the second refractive index sub-layer 107 can be selected from at least one of silicon oxide, silicon nitride, and silicon oxynitride, for example, at least one of silicon oxide, silicon nitride, and silicon oxynitride. The material of the lower refractive index in the third refractive index sub-layer 108 and the fourth refractive index sub-layer 109 can be selected from at least one of silicon oxide, silicon nitride, and silicon oxynitride, for example, at least one of silicon oxide, silicon nitride, and silicon oxynitride.

[0065] In some embodiments, the thickness of the first light adjustment portion 104 is greater than or equal to 380 nanometers and less than or equal to 1.5 micrometers, and can be, for example, 0.5 micrometers, 0.6 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.3 micrometers, 1.4 micrometers, etc. The thickness of the second light adjustment portion 105 is greater than or equal to 380 nanometers and less than or equal to 1.5 micrometers, and can be, for example, 0.5 micrometers, 0.6 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.3 micrometers, 1.4 micrometers, etc.

[0066] In some embodiments, the absolute value of the difference between the refractive index of the first refractive index sublayer 106 and the refractive index of the second refractive index sublayer 107 is greater than or equal to 0.3, for example, it can be 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.4, 0.5, 0.6, 0.7, 0.8, etc., which is conducive to more effectively reducing the transmittance of short wavelength light.

[0067] In some embodiments, the absolute value of the difference between the refractive index of the third refractive index sublayer 108 and the refractive index of the fourth refractive index sublayer 109 is greater than or equal to 0.3, for example, it can be 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.4, 0.5, 0.6, 0.7, 0.8, etc., which is conducive to more effectively and targetedly improving the transmittance of the light emitted by the light-emitting unit 102.

[0068] In some embodiments, the light adjustment layer 103 also includes a spacer 110 located between the first light adjustment portion 104 and the second light adjustment portion 105. The setting of the spacer 110 separates the first light adjustment portion 104 and the second light adjustment portion 105, which is beneficial to avoid mutual interference between the first light adjustment portion 104 and the second light adjustment portion 105, and effectively improves the effect of reducing the transmittance of short-wavelength light by the first light adjustment portion 104 and the effect of improving the transmittance of light emitted by the light-emitting unit 102 by the second light adjustment portion 105.

[0069] In some embodiments, along the direction from the light emitting layer 101 to the light regulating layer 103 , the light regulating layer 103 is composed of a second light regulating portion 105 , a spacer portion 110 , and a first light regulating portion 104 stacked in sequence.

[0070] 1 to 4 , in some embodiments, the thickness of the spacer 110 is greater than the thickness of any of the first refractive index sublayer 106, the second refractive index sublayer 107, the third refractive index sublayer 108, or the fourth refractive index sublayer 109. Preferably, the ratio of the thickness of the spacer 110 to the thickness of the first light adjustment portion 104 is greater than or equal to 1, and the ratio of the thickness of the spacer 110 to the thickness of the first light adjustment portion 104 is less than or equal to 10, for example, the ratio may be 2, 4, 5, 6, 8, etc.; and / or the ratio of the thickness of the spacer 110 to the thickness of the second light adjustment portion 105 is greater than or equal to 1, and the ratio of the thickness of the spacer 110 to the thickness of the second light adjustment portion 105 is less than or equal to 10, for example, the ratio may be 2, 4, 5, 6, 8, etc. The ratio of the thickness of the spacer 110 to the thickness of the first light adjustment portion 104 is greater than or equal to and less than or equal to 10, and / or the ratio of the thickness of the spacer 110 to the thickness of the second light adjustment portion 105 is greater than or equal to and less than or equal to 10, which facilitates sufficient spacing between the first light adjustment portion 104 and the second light adjustment portion 105 within a suitable thickness range. The refractive index of the higher refractive index of the first refractive index sublayer and the second refractive index sublayer is greater than the refractive index of the spacer of the light adjustment layer. And / or the refractive index of the higher refractive index of the third refractive index sublayer and the fourth refractive index sublayer is greater than the refractive index of the spacer of the light adjustment layer.

[0071] 1 to 4 , in some embodiments, the display panel 100 further includes a light shielding layer 111 , and the light shielding layer 111 includes a plurality of light shielding sub-portions 112 . The orthographic projections of the light shielding sub-portions 112 on the light emitting layer 101 surround the light emitting units 102 .

[0072] Referring to Figures 2 and 4, in some embodiments, the first light adjustment portion 104 includes a plurality of first sub-portions 113, each of which is provided in a one-to-one correspondence with the light-emitting unit 102, and the light-shielding sub-portion 112 is provided around the first sub-portion 113. The light-shielding sub-portion 112 is provided in the same layer as at least one first refractive index sub-layer 106, and / or the light-shielding sub-portion 112 is provided in the same layer as at least one second refractive index sub-layer 107. And / or, the second light adjustment portion 105 includes a plurality of second sub-portions 114, each of which is provided in a one-to-one correspondence with the light-emitting unit 102, and the light-shielding sub-portion 112 is provided around the second sub-portion 114. The light-shielding sub-portion 112 is provided in the same layer as at least one third refractive index sub-layer 108, and / or the light-shielding sub-portion 112 is provided in the same layer as at least one fourth refractive index sub-layer 109.

[0073] When the light shielding sub-section 112 is disposed around the first sub-section 113 and the light shielding sub-section 112 is disposed around the second sub-section 114, the spacer 110 includes a plurality of spacer sub-sections 115, each spacer sub-section 115 being disposed in a one-to-one correspondence with the light emitting unit 102, and the light shielding sub-section 112 is disposed around the spacer sub-section 115. The light shielding layer 111 is disposed on the same layer as the light regulating layer 103.

[0074] In some embodiments, the material of the light shielding layer 111 may be selected from black matrix (BM) materials.

[0075] Referring to FIG. 1 and FIG. 2 , in some embodiments, the display panel 100 further includes a filling layer 116 located between the light-emitting layer 101 and the light-regulating layer 103 . The filling layer 116 serves as a support and packaging layer.

[0076] In some embodiments, the display panel 100 further includes an anode located between the light-emitting layer 101 and the substrate, and the anode is provided in a one-to-one correspondence with the light-emitting unit 102. The material of the anode can be selected from at least one of indium tin oxide and silver. For example, the anode can be a three-layer stack of indium tin oxide, silver, and indium tin oxide.

[0077] Referring to FIG. 2 , in some embodiments, the display panel 100 further includes a thin film transistor layer 118 located between the substrate and the anode. The thin film transistor layer 118 includes a plurality of thin film transistors connected to the anode to control the light emitting unit 102 .

[0078] In some embodiments, the light-emitting layer 101 includes a hole injection layer, a hole transport layer located on a side of the hole injection layer away from the substrate, a light-emitting material layer located on a side of the hole transport layer away from the substrate, an electron transport layer located on a side of the light-emitting material layer away from the substrate, and an electron transport layer located on a side of the light-emitting material layer away from the substrate. In the light-emitting units 102 emitting light of different colors, the light-emitting materials in the light-emitting material layers are different.

[0079] In some embodiments, the display panel 100 further includes a cathode located on a side of the light-emitting layer 101 away from the substrate, and a capping layer (CPL) located on a side of the cathode away from the substrate. The capping layer is used to reduce total internal reflection of light emitted by the light-emitting unit 102 at the cathode.

[0080] In some embodiments, the light-emitting unit 102 includes a first light-emitting subunit, a second light-emitting subunit, and a third light-emitting subunit, each of which emits light of a different color. The first light-emitting subunit emits red light, the second light-emitting subunit emits green light, and the third light-emitting subunit emits blue light. Depending on the different display panel requirements for the transmittance of light emitted by light-emitting units of different colors, the light-adjusting layer 103 within different types of display panels 100 can be adjusted for the different colors of light emitted by different light-emitting units 102 to specifically improve the transmittance of a particular color of light. For example, the second light-adjusting unit 105 can be adjusted to specifically improve the transmittance of light emitted by the light-emitting unit 102 that emits red light, or to specifically improve the transmittance of light emitted by the light-emitting unit 102 that emits green light, or to specifically improve the transmittance of light (with a wavelength greater than 450 nanometers) emitted by the light-emitting unit 102 that emits blue light.

[0081] 5 to 12 , the following describes a method for manufacturing the light adjustment layer 103 by specifically improving the transmittance of light emitted by the light-emitting unit emitting green light (the second light-emitting sub-unit).

[0082] In this embodiment, the anode is a three-layer stack of indium tin oxide (15 nanometers)-silver (100 nanometers)-indium tin oxide (10 nanometers), the cathode is a magnesium silver alloy (15 nanometers), the capping layer is 60 nanometers, and the light-emitting layer 101 is composed of a hole injection layer (146.5 nanometers), a hole transport layer (15 nanometers), a light-emitting material layer (30 nanometers), and an electron transport layer (30 nanometers).

[0083] Step S100, as shown in FIG5 and FIG6, obtain the optical constants of the high refractive index material TiO2 and the low refractive index material SiO2, wherein FIG5 shows the refractive index and extinction coefficient of TiO2, and FIG6 shows the refractive index and extinction coefficient of SiO2.

[0084] As shown in Figures 3 and 4, taking the example of the refractive index of the first refractive index sub-layer 106 being higher than the refractive index of the second refractive index sub-layer 107, TiO2 is used as the material of the first refractive index sub-layer 106, and SiO2 is used as the material of the refractive index in the second refractive index sub-layer 107, which are stacked in sequence to form the first light adjustment part 104; taking the example of the refractive index of the third refractive index sub-layer 108 being higher than the refractive index of the fourth refractive index sub-layer 109, TiO2 is used as the material of the third refractive index sub-layer 108, and SiO2 is used as the material of the fourth refractive index sub-layer 109, which are stacked in sequence to form the second light adjustment part 105.

[0085] Step S200 , as shown in FIG9 , obtain the central wavelength of the second light-emitting subunit according to the far-field radiation spectrum of the light emitted by the second light-emitting subunit on the side of the filling layer 116 away from the light-emitting layer 101 .

[0086] Step S300, as shown in Figure 7, adjusts the thickness of the first and second refractive index sublayers 106 and 107 within the first light adjustment section 104, and the third and fourth refractive index sublayers 108 and 109 within the second light adjustment section 105, based on the center wavelength of the second light-emitting subunit. This ensures that the transmittance of the light adjustment layer 103 for light with a wavelength less than or equal to 450 nanometers is less than or equal to 20%, and the transmittance for light with the center wavelength of the second light-emitting subunit is greater than or equal to 80%. In this case, the thickness of the fixed spacer 110 is 120 nanometers, and the transmittance of the light adjustment layer 103 for light with the center wavelength of the second light-emitting subunit is obtained at a viewing angle of zero degrees. For example, if the refractive index of the first refractive index sublayer 106 is higher than that of the second refractive index sublayer 107, and the refractive index of the third refractive index sublayer 108 is higher than that of the fourth refractive index sublayer 109, the thickness of each first refractive index sublayer 106 is 27 nm, the thickness of each second refractive index sublayer 107 is 73 nm, the thickness of each third refractive index sublayer 108 is 52.5 nm, and the thickness of each fourth refractive index sublayer 109 is 87.5 nm. A viewing angle of zero degrees is a viewing angle perpendicular to the plane of the display panel 100.

[0087] Step S400, as shown in Figure 8, adjust the thickness of the spacer 110 according to the central wavelength of the second light-emitting sub-unit, and obtain the thickness of the spacer 110 corresponding to the maximum light transmittance of the light adjustment layer 103 to the central wavelength of the second light-emitting sub-unit at a zero-degree viewing angle, which is selected as the final thickness of the spacer 110.

[0088] Step S500 , as shown in FIG9 and FIG12 , obtain the far-field radiation spectrum of the light regulating layer 103 away from the light emitting layer 101 and obtain a color saturation of P1=0.9649.

[0089] For comparison, as shown in FIG10 , the optical constants of the traditional organic dye filter corresponding to the second light-emitting sub-unit are obtained; as shown in FIG11 , the reflectivity and transmittance of the traditional organic dye filter for the light of the central wavelength of the second light-emitting sub-unit at a zero-degree viewing angle are obtained; as shown in FIG12 , the far-field radiation spectrum of the traditional organic dye filter away from the light-emitting layer 101 is obtained and the color saturation is obtained as P2=0.8774.

[0090] A comparison of Figures 8 and 11 shows that the light modulation layer 103 provided by the present application has a transmittance of greater than or equal to 80% for light emitted by the second light-emitting sub-unit, while the transmittance of conventional organic dye filters for light emitted by the second light-emitting sub-unit is less than 80%, demonstrating the excellent transmittance of the light modulation layer 103 provided by the present application for light emitted by the light-emitting unit 102. As shown in Figure 8 , the transmittance of the light modulation layer 103 provided by the present application for light with a wavelength of less than or equal to 450 nanometers is less than or equal to 20%, or even close to 0, demonstrating excellent blocking performance. In addition, it can be seen from Figures 9 and 12 that the half-band width of the far-field radiation spectrum of the light emitted by the second light-emitting sub-unit provided in the present application after passing through the light adjustment layer 103 is significantly smaller than the half-band width of the far-field radiation spectrum of the light emitted by the second light-emitting sub-unit after passing through the traditional organic dye filter, the color saturation is higher, and the intensity of the central wavelength is stronger when the luminous intensity of the second light-emitting unit 102 is the same, indicating that the light adjustment layer 103 provided in the present application has higher transmittance to the light emitted by the light-emitting unit 102 and reduces the irradiation of the light-emitting unit 102 with short-wavelength ambient light, while improving the color purity of the display of the display panel 100 and improving the display effect of the display panel 100.

[0091] The display panel 100 provided by an embodiment of the present invention is provided with a light adjustment layer 103. While the light adjustment layer 103 allows the light emitted by the light-emitting unit 102 to pass through, it reduces the amount of light less than or equal to 450 nanometers in the external ambient light that is irradiated on the light-emitting unit 102, reduces the decomposition of the organic light-emitting material in the light-emitting unit 102, and improves the service life of the display panel 100.

[0092] Referring to FIG. 13 , an embodiment of the present invention further provides a display device 10 , including the display panel 100 as described above.

[0093] In some embodiments, the display device 10 further includes a device body 200 , and the device body 200 is integrated with the display panel 100 .

[0094] The specific structure of the display panel 100 can be found in any of the above-mentioned embodiments and drawings of the display panel, and will not be described in detail here.

[0095] In this embodiment, the device body 200 may include a middle frame, frame glue, etc., and the display device 10 may be a display terminal such as a mobile phone, a tablet, or a television, which is not limited here.

[0096] An embodiment of the present invention discloses a display panel; the display panel includes a light-emitting layer having multiple light-emitting units and an adjustment layer located on the light-emitting side of the light-emitting units, wherein the light-adjusting layer has a transmittance greater than or equal to 80% for light with a wavelength greater than 450 nanometers emitted by the light-emitting units, and a transmittance less than or equal to 20% for light with a wavelength less than or equal to 450 nanometers; by providing a light-adjusting layer, the present invention reduces the exposure of light less than or equal to 450 nanometers in the external ambient light to the light-emitting units while maintaining transparency to the light emitted by the light-emitting units, thereby reducing the decomposition of organic light-emitting materials in the light-emitting units and improving the service life of the display panel.

[0097] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this application, and all these changes or substitutions should fall within the scope of protection of the claims attached to this application.

Claims

1. A display panel, wherein: include: a light-emitting layer comprising a plurality of light-emitting units; a light regulating layer, located on the light emitting side of the light emitting unit; The transmittance of the light regulating layer to light with a wavelength greater than 450 nanometers emitted by the light emitting unit is greater than or equal to 80%, and the transmittance of the light regulating layer to light with a wavelength less than or equal to 450 nanometers is less than or equal to 20%.

2. The display panel according to claim 1, wherein The light regulating layer includes a first light regulating portion and a second light regulating portion, wherein the first light regulating portion is located on a side of the second light regulating portion away from the light emitting layer; The transmittance of the first light adjustment portion to light with a wavelength less than or equal to 450 nanometers is smaller than the transmittance of the second light adjustment portion to light with a wavelength less than or equal to 450 nanometers.

3. The display panel according to claim 2, wherein: The light adjustment layer also includes a spacer located between the first light adjustment portion and the second light adjustment portion, the ratio of the thickness of the spacer to the thickness of the first light adjustment portion is greater than or equal to 1, and the ratio of the thickness of the spacer to the thickness of the first light adjustment portion is less than or equal to 10.

4. The display panel according to claim 2, wherein: The light adjustment layer also includes a spacer located between the first light adjustment portion and the second light adjustment portion, the ratio of the thickness of the spacer to the thickness of the second light adjustment portion is greater than or equal to 1, and the ratio of the thickness of the spacer to the thickness of the second light adjustment portion is less than or equal to 10.

5. The display panel according to claim 2, wherein: The first light adjustment portion includes at least one first refractive index sublayer and at least one second refractive index sublayer. Along the direction from the light-emitting layer to the light adjustment layer, the first refractive index sublayer and the second refractive index sublayer are alternately arranged, and the refractive index of the first refractive index sublayer is different from the refractive index of the second refractive index sublayer. The display panel according to claim 5 , wherein: The refractive index of the first refractive index sublayer is greater than that of the second refractive index sublayer, and the thickness ratio of the first refractive index sublayer in the first light adjustment part is greater than the thickness ratio of the second refractive index sublayer in the first light adjustment part.

7. The display panel according to claim 5, wherein: The refractive index of the first refractive index sublayer is smaller than that of the second refractive index sublayer, and the thickness ratio of the first refractive index sublayer in the first light adjustment part is smaller than the thickness ratio of the second refractive index sublayer in the first light adjustment part.

8. The display panel according to claim 5, wherein: The material of the one with a higher refractive index in the first refractive index sublayer and the second refractive index sublayer is selected from at least one of titanium oxide and zirconium oxide; The material of the one with a lower refractive index in the first refractive index sub-layer and the second refractive index sub-layer is selected from at least one of silicon oxide, silicon nitride, and silicon oxynitride.

9. The display panel according to claim 5, wherein: The second light adjustment portion includes at least one third refractive index sublayer and at least one fourth refractive index sublayer. Along the direction from the light-emitting layer to the light adjustment layer, the third refractive index sublayer and the fourth refractive index sublayer are alternately arranged, and the refractive index of the third refractive index sublayer is different from the refractive index of the fourth refractive index sublayer.

10. The display panel according to claim 9, wherein: The refractive index of the third refractive index sublayer is greater than that of the fourth refractive index sublayer, and the thickness ratio of the third refractive index sublayer in the second light adjustment portion is greater than the thickness ratio of the fourth refractive index sublayer in the second light adjustment portion.

11. The display panel according to claim 9, wherein: The refractive index of the third refractive index sublayer is smaller than that of the fourth refractive index sublayer, and the thickness ratio of the third refractive index sublayer in the second light adjustment portion is smaller than the thickness ratio of the fourth refractive index sublayer in the second light adjustment portion.

12. The display panel according to claim 9, wherein: The absolute value of the difference between the refractive index of the first refractive index sublayer and the refractive index of the second refractive index sublayer is greater than or equal to 0.3; An absolute value of a difference between a refractive index of the third refractive index sublayer and a refractive index of the fourth refractive index sublayer is greater than or equal to 0.

3.

13. The display panel according to claim 9, wherein: The refractive index of the higher one of the first refractive index sublayer and the second refractive index sublayer is greater than the refractive index of the spacer portion of the light adjustment layer.

14. The display panel according to claim 9, wherein: The refractive index of the higher one of the third refractive index sublayer and the fourth refractive index sublayer is greater than the refractive index of the spacer portion of the light adjustment layer.

15. The display panel according to claim 9, wherein: The material of the one with a higher refractive index in the third refractive index sublayer and the fourth refractive index sublayer is selected from at least one of titanium oxide and zirconium oxide; The material of the one with a lower refractive index in the third refractive index sub-layer and the fourth refractive index sub-layer is selected from at least one of silicon oxide, silicon nitride, and silicon oxynitride.

16. The display panel according to claim 2, wherein: The display panel further includes a light shielding layer including a plurality of light shielding sub-sections. The first light adjustment section includes a plurality of first sub-sections. The first sub-sections are arranged in a one-to-one correspondence with the light emitting units. The light shielding sub-sections surround the first sub-sections.

17. The display panel according to claim 2, wherein: The display panel further includes a light shielding layer including a plurality of light shielding sub-sections. The second light adjustment section includes a plurality of second sub-sections. The second sub-sections are arranged in a one-to-one correspondence with the light emitting units. The light shielding sub-sections surround the second sub-sections.

18. A display device, wherein: A display panel is included, wherein the display panel includes: a light-emitting layer comprising a plurality of light-emitting units; a light regulating layer, located on the light emitting side of the light emitting unit; The transmittance of the light regulating layer to light with a wavelength greater than 450 nanometers emitted by the light emitting unit is greater than or equal to 80%, and the transmittance of the light regulating layer to light with a wavelength less than or equal to 450 nanometers is less than or equal to 20%.

19. The display device according to claim 18, wherein: The light regulating layer includes a first light regulating portion and a second light regulating portion, wherein the first light regulating portion is located on a side of the second light regulating portion away from the light emitting layer; The transmittance of the first light adjustment portion to light with a wavelength less than or equal to 450 nanometers is smaller than the transmittance of the second light adjustment portion to light with a wavelength less than or equal to 450 nanometers.

20. The display device according to claim 19, wherein The light adjustment layer also includes a spacer located between the first light adjustment portion and the second light adjustment portion, the ratio of the thickness of the spacer to the thickness of the first light adjustment portion is greater than or equal to 1, and the ratio of the thickness of the spacer to the thickness of the first light adjustment portion is less than or equal to 10.

Images