Dual-color light-emitting structure and red-green-blue sub-pixel integrated structure

Abstract

The application discloses a dual-color light-emitting structure, which comprises a light-emitting layer provided with a first light-emitting material; the light-emitting layer comprises a first light-emitting area and a second light-emitting area; the light-emitting back side of the first light-emitting area is provided with a first light source, the first light-emitting area is driven by the light energy of the first light source to excite a second light source; the light-emitting area is provided with a driving electrode on the two sides of the light-emitting diameter, the second light-emitting area is driven by the driving electrode to electroluminescence and excite a third light source, and the light-emitting color of the second light source and the third light source is different. In addition, the application also discloses a red-green-blue sub-pixel integrated structure. Compared with the traditional quantum dot light-emitting display, the application can save light-emitting materials, and accordingly the process steps can be reduced, and on this basis, the light-emitting materials of the dual-color or multi-color pixels can be adjacent to each other, so that the device precision can be further improved and the product size can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photoelectric display, in particular to a dual-color light-emitting structure and a red-green-blue sub-pixel integrated structure. BACKGROUND

[0002] In the field of display unit technology, a traditional sub-pixel display unit is composed of three kinds of light-emitting layer materials of red, green and blue, and the light-emitting unit is color-modulated by modulating the light-emitting intensity of the three kinds of light-emitting layers. This kind of traditional sub-pixel display technology has been developed for a long time, and has the advantages of low cost, mature process, wide color gamut range, etc. However, with the advent of the Internet of Things, the fifth generation mobile network and artificial intelligence, the demand for expanding flat panel displays to portable / wearable displays and near-eye displays with ultra-high resolution has increased. Due to the limitations of mass transfer, metal bonding and pixel driving technology manufacturing, it is difficult to further reduce the pixel size to sub-micron level by traditional technology route. Therefore, it is necessary to create a technology route using nano-LED as a display sub-pixel.

[0003] The smallest light-emitting diode on the market is mainly composed of Q-LED and Micro-LED. However, due to the limitations of traditional sub-pixel display technology, the light-emitting pixel size is relatively large, which is not conducive to the miniaturization of display pixels. In order to solve the above problems, it is an urgent requirement to design a new type of sub-pixel display technology. SUMMARY

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the present application is to provide a dual-color light-emitting structure and a red-green-blue sub-pixel integrated structure, which aims to generate dual-color light sources by driving the same light-emitting material with an electrical signal and optical conversion to form a pixel. The advantage is that only one type of light-emitting material is needed, which can reduce one alignment operation, improve device accuracy and reduce product size on the one hand, and on the other hand, the light-emitting materials of dual-color or multi-color pixels can be adjacent to each other to further improve device accuracy and reduce product size.

[0005] To achieve the above purpose, the present application provides a dual-color light-emitting structure, comprising a light-emitting layer provided with a first light-emitting material; the light-emitting layer comprises a first light-emitting area and a second light-emitting area; the light-emitting back side of the first light-emitting area is provided with a first light source, and the first light-emitting area is excited by the light energy of the first light source to generate a second light source; the light-emitting area of the second light-emitting area is provided with a driving electrode on the two sides of the light-emitting diameter, and the second light-emitting area is driven by the driving electrode to emit light and excite a third light source, and the light-emitting color of the second light source and the third light source is different.

[0006] The second application of the present application provides a red-green-blue sub-pixel integrated structure, comprising a first sub-pixel unit, a second sub-pixel unit and a third sub-pixel unit.

[0007] The first sub-pixel is provided with a fourth light source and has a light-emitting color of one of red, green and blue.

[0008] The second sub-pixel comprises a first light-emitting area provided with a first light-emitting material, a first light source arranged on the back light side of the first light-emitting area; the first light-emitting area is driven by the light energy of the first light source to excite a second light source; the light-emitting color of the second light source is one of red, green and blue, and is different from the color of the fourth light source.

[0009] The third sub-pixel comprises a second light-emitting area provided with a first light-emitting material, and driving electrodes arranged on both sides of the second light-emitting area; the second light-emitting area is driven by the driving electrodes to excite a third light source; the light-emitting color of the third light source is one of red, green and blue, and is different from the colors of the fourth light source and the second light source.

[0010] Further, the first light-emitting material has the characteristics of field-induced fluorescence color change and the characteristics of up-conversion luminescence or down-conversion luminescence; the material includes inorganic luminescent material, organic luminescent material, organic-inorganic hybrid luminescent material, quantum dot luminescent material, gold nanocluster luminescent material, perovskite luminescent material and liquid crystal material.

[0011] Further, the first light-emitting area is photo-induced to excite the second light source by the light energy of the first light source; the second light-emitting area is electroluminescent to excite the third light source by the driving electrodes.

[0012] Further, the first light-emitting area and the second light-emitting area are adjacent to each other.

[0013] Further, the first light source and the fourth light source are the same color light source.

[0014] Further, the first sub-pixel, the second sub-pixel and the third sub-pixel are provided with an anti-crosstalk black mask on the light-emitting side.

[0015] Further, the waveform of the electric signal applied between the driving electrodes includes but is not limited to sine wave, triangular wave, square wave or pulse, and the signal frequency is between 0 Hz and 100 GHz.

[0016] Further, the shape of the driving electrodes includes planar, strip, interdigital, point and ring electrodes or combinations thereof.

[0017] Further, the material of the black mask includes metal, inorganic material, textile or combinations thereof coated with light-absorbing paint.

[0018] The beneficial effects of the present application are: 1) compared with the traditional quantum dot light emitting display, the present application can save a light emitting material, and accordingly the process steps can be reduced, and on this basis, the light emitting materials of double-color or multi-color pixels can be adjacent to each other, which can further improve the device precision and reduce the product size. 2) through the setting of the black mask, the crosstalk of the area between the sub-pixels can be covered, and the color accuracy can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of a double-color light emitting structure in a specific embodiment of the present application;

[0020] Figure 2 is a schematic diagram of a red-green-blue sub-pixel integrated structure in a specific embodiment of the present application;

[0021] Figure 3 is a driving load schematic diagram of a red-green-blue sub-pixel integrated structure in a specific embodiment of the present application;

[0022] Figure 4 is a top view of a red-green-blue sub-pixel integrated structure in a specific embodiment of the present application;

[0023] Figure 5 is a test diagram of a red-green-blue sub-pixel integrated structure in a specific embodiment of the present application. DETAILED DESCRIPTION

[0024] The embodiments of the present patent are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary, only for explaining the present patent, and cannot be understood as a limitation of the present patent.

[0025] In the description of the present patent, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present patent.

[0026] In the description of the patent, it is necessary to explain that, unless otherwise expressly specified and limited, the terms "mount", "connect", "connect", "set" should be understood broadly, for example, it can be fixedly connected, set, or it can be detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the patent can be understood according to the specific circumstances.

[0027] As Figure 1 shown, in the first embodiment of the present application, a dual-color light-emitting structure is provided, which comprises a light-emitting layer 103 provided with a first light-emitting material; the light-emitting layer 103 comprises a first light-emitting area 104 and a second light-emitting area 105; the light-emitting back side of the first light-emitting area 104 is provided with a first light source 101, and the first light-emitting area 104 is driven by the light energy of the first light source 101 to excite a second light source; the light-emitting area 105 is provided with a driving electrode 102 on both sides of the light-emitting area 105, and the second light-emitting area 105 is driven by the driving electrode 102 to electroluminesce and excite a third light source, and the light-emitting color of the second light source and the third light source is different.

[0028] It is worth mentioning that the driving electrode 102 on the light-emitting side of the device structure generally uses a transparent electrode, and when a metal electrode is used, a mesh electrode, a grid electrode or a hollow electrode can be used to ensure the light transmittance of the device. Similar technical solutions can be obtained in the prior art, which will not be described here.

[0029] When the driving electrode 102 on the light-emitting side of the device structure is a transparent electrode, its material includes graphene, tin oxide, zinc oxide, graphene oxide, indium tin oxide, carbon nanotube, silver nanowire, copper nanowire or a combination thereof; the material of the opaque electrode of the first driving electrode 102 and the second driving electrode 102 includes gold, silver, aluminum, copper or an alloy thereof.

[0030] In this embodiment, the first light-emitting material has the characteristics of field-induced fluorescence color change and the characteristics of up-conversion luminescence or down-conversion luminescence; its material includes inorganic luminescent material, organic luminescent material, organic-inorganic hybrid luminescent material, quantum dot luminescent material, gold nanocluster luminescent material, perovskite luminescent material, liquid crystal material.

[0031] In this embodiment, the first light-emitting area 104 is driven by the light energy of the first light source 101 to photoluminesce and excite a second light source; the second light-emitting area 105 is driven by the driving electrode 102 to electroluminesce and excite a third light source.

[0032] In this embodiment, the waveform of the electrical signal applied between the driving electrodes 102 includes but is not limited to sine wave, triangular wave, square wave or pulse, and the signal frequency is between 0Hz and 100GHz.

[0033] The light emitting layer 103 can also respond to direct current driving; further, to avoid polarization effect in the light emitting layer 103, an alternating current signal is generally used for driving, and the specific signal frequency can be selected according to the driving characteristics of the specific light emitting material.

[0034] In the embodiment, the shape of the driving electrode 102 includes a surface, a strip, an interdigital electrode, a dot, a ring electrode or a combination thereof.

[0035] In the embodiment, the material of the black mask 106 includes a metal coated with light absorbing paint, an inorganic material, a textile or a combination thereof. The purpose of the black mask 106 is to avoid the influence of the adjacent area on the driving of the two light emitting areas, so as to avoid abnormal light emission in the middle area. Therefore, the black mask 106 is provided to shield and isolate.

[0036] In the embodiment, an insulating layer can be provided between the related layers according to the needs of the device.

[0037] Typical insulating materials include polymer film materials, glass fiber reinforced resin materials, ceramic materials or a combination thereof; the light transmittance of the first insulating layer and the second insulating layer is generally greater than or equal to 80% between 380nm and 780nm wavelengths.

[0038] In addition, the first light emitting area 104 and the second light emitting area 105 are provided with an anti-crosstalk black mask 106 on the light emitting side. In addition, to carry the device, the first light source 101, the driving electrode 102, the light emitting layer 103 and the like can be sequentially carried on the substrate 100 according to the structure.

[0039] As shown in Figure 2 , Figure 4 In the second embodiment of the present application, a red, green and blue sub-pixel integrated structure is provided, which includes a first sub-pixel unit 107, a second sub-pixel unit 108 and a third sub-pixel unit 109.

[0040] The first sub-pixel is provided with a fourth light source 110 and the light emitting color is one of red, green and blue;

[0041] The second sub-pixel includes a first light emitting area 104 provided with a first light emitting material, a first light source 101 provided on the back light side of the first light emitting area 104; the first light emitting area 104 is driven by the light energy of the first light source 101 to excite a second light source; the light emitting color of the second light source is one of red, green and blue, and is different from the color of the fourth light source 110;

[0042] The third sub-pixel comprises a second light-emitting region 105 provided with a first light-emitting material, and a driving electrode 102 provided on both sides of the second light-emitting region 105, the second light-emitting region 105 is driven by the driving electrode 102 to excite a third light source; the light-emitting color of the third light source is one of red, green and blue, and is different from the colors of the fourth light source 110 and the second light source.

[0043] It is worth mentioning that the driving electrode 102 on the light-emitting side of the device structure is generally a transparent electrode, and when a metal electrode is used, a mesh electrode, a grid electrode or a hollow electrode can be used to ensure the light transmittance of the device. Similar technical solutions can be obtained in the prior art, which will not be described here.

[0044] When the driving electrode 102 on the light-emitting side of the device structure is a transparent electrode, its material includes graphene, tin oxide, zinc oxide, graphene oxide, indium tin oxide, carbon nanotubes, silver nanowires, copper nanowires or a combination thereof; the material of the opaque electrode of the first driving electrode 102 and the second driving electrode 102 includes gold, silver, aluminum, copper or an alloy thereof.

[0045] In this embodiment, the first light-emitting material has the characteristics of field-induced fluorescence color change and up-conversion or down-conversion luminescence; its material includes inorganic luminescent material, organic luminescent material, organic-inorganic hybrid luminescent material, quantum dot luminescent material, gold nanocluster luminescent material, perovskite luminescent material, liquid crystal material.

[0046] In this embodiment, the first light-emitting region 104 is driven by the light energy of the first light source 101 to photo-luminescence to excite the second light source; the second light-emitting region 105 is driven by the driving electrode 102 to electroluminescence to excite the third light source.

[0047] In this embodiment, the first light-emitting region 104 and the second light-emitting region 105 are adjacent to each other.

[0048] In this embodiment, the first light source 101 and the fourth light source 110 are the same color light source.

[0049] In this embodiment, the first sub-pixel, the second sub-pixel and the third sub-pixel are provided with an anti-crosstalk black mask 106 on the light-emitting side.

[0050] In this embodiment, the waveform of the electrical signal applied between the driving electrodes 102 includes but is not limited to sine wave, triangular wave, square wave or pulse, and the signal frequency is between 0 Hz and 100 GHz.

[0051] In this embodiment, the shape of the driving electrode 102 includes a planar electrode, a strip electrode, an interdigital electrode, a dot electrode, a ring electrode or a combination thereof.

[0052] In the embodiment, the material of the black mask 106 includes metal, inorganic material, textile or combination thereof coated by light-absorbing paint. The black mask 106 is arranged to avoid abnormal light emission in the middle region caused by the driving of the adjacent regions.

[0053] In the embodiment, the insulating layer 111 can be arranged between the related layers according to the requirement of the device.

[0054] Typical insulating materials include polymer film material, glass fiber reinforced resin material, ceramic material or combination thereof; the light transmittance of the first insulating layer 111 and the second insulating layer 111 is generally greater than or equal to 80% at the wavelength of 380nm to 780nm.

[0055] In addition, the first light source 101, the driving electrode 102 and the like can be sequentially mounted on the substrate 100 according to the structure for carrying the device.

[0056] As shown in Figure 3 The driving signal is loaded to the device, wherein the driving electrode 102 applies AC driving signal; the first light source 101 and the second light source adopt LED micro unit and are driven by DC. The fourth light source 110 directly serves as the first sub-pixel and presents blue sub-pixel; the first light source 101 provides energy for the photo-induced light emission of the first light emitting region 104 and forms the second sub-pixel, which presents green sub-pixel; the first light source 101 provides energy for the photo-induced light emission of the first light emitting region 104 and forms the second sub-pixel, which presents green sub-pixel; the driving signal provides energy for the second light emitting region 105 and forms the third sub-pixel, which presents red sub-pixel. The actual effect diagram of the three lightings is shown in Figure 5 .

[0057] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and variations without creative work based on the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment based on the prior art according to the concept of the present application should be within the protection scope defined by the claims.

Claims

1. A dual-color light-emitting structure, characterized in that, The device includes a light-emitting layer with a first light-emitting material; the light-emitting layer includes a first light-emitting area and a second light-emitting area; a first light source is provided on the back side of the light-emitting area of ​​the first light-emitting area, and the first light-emitting area is driven by the light energy of the first light source to excite a second light source; driving electrodes are provided on both sides of the light-emitting radial direction of the second light-emitting area, and the second light-emitting area is driven by the driving electrodes to electroluminesce and excite a third light source, wherein the second light source and the third light source emit different colors.

2. A red-green-blue sub-pixel integrated structure, characterized in that, It includes a first sub-pixel unit, a second sub-pixel unit, and a third sub-pixel unit; The first sub-pixel is provided with a fourth light source and the emitted light color is one of red, green, or blue; The second sub-pixel includes: a first light-emitting area provided with a first light-emitting material, and a first light source disposed on the backlight side of the first light-emitting area; the first light-emitting area is driven by the light energy of the first light source to excite a second light source; the light emission color of the second light source is one of red, green, and blue, and is different from the color of the fourth light source; The third sub-pixel includes: a second light-emitting area provided with a first light-emitting material, and driving electrodes disposed on both sides of the second light-emitting area. The second light-emitting area is driven by the driving electrodes to excite a third light source. The light emission color of the third light source is one of red, green, and blue, and is different from the color of the fourth light source and the second light source.

3. The structure according to claim 1 or 2, characterized in that, The first luminescent material has field-induced fluorescence color-changing properties and upconversion luminescence or downconversion luminescence properties; the material includes inorganic luminescent materials, organic luminescent materials, organic-inorganic hybrid luminescent materials, quantum dot luminescent materials, gold nanocluster luminescent materials, perovskite luminescent materials, and liquid crystal materials.

4. The structure according to claim 1 or 2, characterized in that, The first light-emitting area is driven by the light energy of the first light source to emit light and thus excite the second light source; the second light-emitting area is driven by the driving electrode to emit light and thus excite the third light source.

5. The integrated red, green, and blue sub-pixel structure as described in claim 2, characterized in that, The first luminescent area is adjacent to the second luminescent area.

6. The integrated red, green, and blue sub-pixel structure as described in claim 2, characterized in that, The first light source and the fourth light source are light sources of the same color.

7. The integrated red, green, and blue sub-pixel structure as described in claim 2, characterized in that, The first sub-pixel, the second sub-pixel, and the third sub-pixel are provided with anti-crosstalk black masks on the light-emitting side.

8. The structure according to claim 1 or 2, characterized in that, The waveform of the electrical signal applied between the driving electrodes includes, but is not limited to, sine wave, triangle wave, square wave or pulse, and the signal frequency is between 0Hz and 100GHz.

9. The structure according to claim 1 or 2, characterized in that, The shape of the driving electrode includes planar, strip, interdigitated, dot, ring electrode or a combination thereof.

10. The structure according to claim 7, characterized in that, The materials of the black mask include metals, inorganic materials, textiles, or combinations thereof coated with light-absorbing paint.

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