WO2021102664A1

WO2021102664A1 - Display assembly and electronic device using display assembly

Info

Publication number: WO2021102664A1
Application number: PCT/CN2019/120845
Authority: WO
Inventors: 刘政明; 徐瑞林
Original assignee: 重庆康佳光电技术研究院有限公司
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2021-06-03
Also published as: CN113196496B; CN113196496A

Abstract

A display assembly (99), which comprises: a substrate (10), a plurality of pixel units (20) provided on the substrate (10) and distributed in an array, and a protective layer (30) disposed on the side of the pixel units (20) away from the substrate (10). Each pixel unit (20) is provided with a light-emitting diode (LED) (21), and the light-emitting surfaces of the LEDs (21) are exposed to the protective later (30). The display assembly (99) also comprises: a wavelength-selective reflective layer (40), which is disposed on the outgoing light paths of the pixel units (20), and which is used to reflect ambient light of a first preset wave band, said first preset wave band being a wave band corresponding to light invisible to the human eye. Additionally, further provided is an electronic device (999) that uses the foregoing display assembly (99).

Description

Display assembly and electronic equipment using the display assembly

Technical field

The present invention relates to the field of display technology, and in particular to a display assembly and an electronic device using the display assembly.

Background technique

Micro Light-Emitting Diode (Micro-LED), as a current-type light-emitting device, is used for its active light emission, fast response speed, wide viewing angle, rich color, high brightness, low power consumption and many other advantages. It is widely used in display devices. A display device using micro light emitting diodes generally includes a substrate and LED pixel units arranged in an array on the substrate.

However, when external ambient light enters the LED pixel unit, it will increase the heat of the LED pixel unit, especially in the case of strong ambient light, which increases the difficulty of heat dissipation of the LED display.

Summary of the invention

In view of this, it is necessary to provide a display assembly and an electronic device using the display assembly, which can reduce the heat problem of ambient light affecting the display assembly and the electronic device.

In the first aspect, an embodiment of the present invention provides a display assembly. The display assembly includes a substrate, a plurality of pixel units arranged on the substrate and arranged in an array, and a protective layer arranged on the side of the pixel unit away from the substrate. Each pixel unit is provided with a light-emitting diode. The protective layer is exposed on the light-emitting surface, and the display assembly further includes: a wavelength-selective reflective layer, the wavelength-selective reflective layer is disposed on the light emitting path of the pixel unit, and the wavelength-selective reflective layer is used to reflect the first preset Ambient light in a waveband, and the first preset waveband is a waveband corresponding to light invisible to human eyes.

In the second aspect, an embodiment of the present invention provides an electronic device. The electronic device includes a housing and a display assembly arranged on the housing, the display assembly including a substrate, a plurality of pixel units arranged on the substrate and arranged in an array, and arranged on the side of the pixel unit away from the substrate Each pixel unit is provided with a light-emitting diode, and the light-emitting surface of the light-emitting diode exposes the protective layer, and the display assembly further includes: a wavelength selective reflection layer, the wavelength selective reflection layer is disposed on the pixel unit On the light exiting light path of, the wavelength selective reflection layer is used to reflect ambient light in a first preset wavelength band, and the first preset wavelength band is a wavelength band corresponding to light invisible to human eyes.

The above-mentioned display assembly and electronic device can reflect the infrared light in the ambient light by providing the wavelength selective reflection layer, thereby preventing the infrared light in the ambient light from entering the display assembly. Since most of the light contained in the ambient light is infrared light, the influence of the ambient light on the heat of the display assembly or the electronic device can be greatly reduced.

Description of the drawings

Fig. 1 is a schematic diagram of the display assembly of the first embodiment.

Fig. 2 is a schematic diagram of the display assembly of the second embodiment.

Fig. 3 is a schematic diagram of the display assembly of the third embodiment.

Fig. 4 is a schematic diagram of the display assembly of the fourth embodiment.

Fig. 5 is a schematic diagram of an electronic device to which a display assembly is applied.

Detailed ways

In order to have a clearer and more accurate understanding of the content of the present invention, it will now be described in detail with reference to the drawings. The drawings of the specification show examples of embodiments of the present invention, in which the same reference numerals denote the same elements. It can be understood that the scale shown in the drawings in the specification is not the scale of the actual implementation of the present invention, and is only for illustrative purposes, and is not drawn according to the original size.

Please refer to FIG. 1, which is a schematic diagram of the display assembly 99 of the first embodiment. The display assembly 99 includes a base substrate 10, a plurality of pixel units 20 arranged on the substrate 10 and arranged in an array (only one pixel is used as an example in the figure), and a protective layer 30 arranged on the side of the pixel unit 20 away from the substrate 10, The wavelength selective reflective layer 40 on the side of the protective layer 30 away from the pixel unit 20, that is, the wavelength selective reflective layer 40 is disposed on the light emitting path of the pixel unit 20. In this embodiment, the display component 99 may be located in an electronic device, such as a mobile phone, a tablet computer, and other electronic devices including an LED display screen. In this embodiment, the wavelength selective reflection layer 40 is built in the display assembly 99. In some feasible embodiments, the wavelength selective reflective layer 40 can also be externally hung on the display component 99, as long as the wavelength selective reflective layer 40 is located on the light emitting path of the pixel unit 20.

Each pixel unit 20 is provided with a light emitting diode 21 having a light emitting surface exposing the protective layer, wherein the light emitting diode 21 is preferably a miniature light emitting diode. The size of the miniature light-emitting diode is on the order of micrometers, and further, the size of the miniature light-emitting diode is less than 100 microns.

In this embodiment, the substrate 10 may be transparent or opaque. If the substrate 10 is set to be transparent, it can be made of glass material. The glass material can be, but is not limited to, a glass material with SiO2 as the main component. In some feasible embodiments, plastic transparent materials can also be used. The plastic glass materials can be, but are not limited to, polyethersulfone (pes), polyacrylate (par), polyetherimide (pei), and polynaphthalene. Ethylene formate (pet), polyphenylene sulfide (pps), poly-α-acrylate, polyimide, polycarbonate (pc), cellulose triacetate (TAC), cellulose acetate propionate (CAP) )Wait. If the substrate 10 is set to be non-transparent, it can be made of a metal material. Specifically, the metal material may be, but not limited to, iron, chromium, manganese, nickel, titanium, molybdenum, stainless steel, and the like.

The substrate 10 is provided with a number of pixel circuits 11 (only one pixel circuit is taken as an example in the figure), a transparent electrode 12, a pixel isolation layer 13, a flattening layer 14, an insulating layer 15, and a buffer layer 16. Among them, the buffer layer 16, the insulating layer 15, the flattening layer 14, and the pixel isolation layer 13 are arranged on the substrate 10 in sequence. The pixel circuit 11 is embedded in the insulating layer 15 and the flattening layer 14. The flattening layer 14 covers the side of the pixel circuit 11 away from the insulating layer 15, and the side away from the insulating layer 15 forms a flat surface (not shown).

The buffer layer 16 is laid on the upper surface of the substrate 10 to flatten the substrate 10 and effectively prevent impurities or moisture from penetrating from the substrate 10. The buffer layer 16 may be made of inorganic materials. The inorganic material can be, but is not limited to, silicon oxide, silicon nitride, silicon oxide, aluminum oxide, aluminum nitride, titanium oxide, and the like. The buffer layer 16 can also be made of organic materials. The organic material can be, but is not limited to, polyimide, polyamide, or acrylic.

The pixel isolation layer 13 is made of insulating material and is provided with a plurality of first slots (not shown in the figure). The light emitting diodes 21 are arranged in the first slots one by one to isolate the light emitting diodes 21. The flattening layer 14 is provided with a plurality of second slots, and the first slots and the second slots are connected. The transparent electrode 12 is located in the first slot and the second slot (not shown), and is used to electrically connect the pixel circuit 11 and the light emitting diode 21. Wherein, the flattening layer 14 is made of an insulating material, which includes but is not limited to SiO2, Si3N4, HfO2, SiON, TiO2, TaO3, SnO2, and the like.

The pixel unit circuit 11 includes a transistor TFT, a data line, a scan line, etc., for driving the light emitting diode 21 of each pixel unit 20 to emit light. The gate, source, and drain of the transistor TFT are made of main metal materials and doped with conductive semiconductor materials. The metal material can be, but is not limited to, copper, aluminum, tungsten, gold, silver, etc. The conductive semiconductor material may be, but is not limited to, polysilicon.

The insulating layer 15 includes a gate insulating layer 150 and a non-gate insulating layer 151. The insulating layer 150 is made of an inorganic material, and the inorganic material may be, but is not limited to, an oxidizing material (such as SiO2), a nitrided material (SiN), or the like.

In this embodiment, the protective layer 30 is made of insulating material. The wavelength selective reflection layer 40 is used to reflect ambient light in a first preset waveband, which is a waveband corresponding to light invisible to the human eye. The wavelength selective reflection layer 40 is configured as, but not limited to, a reflective grating structure or a dichroic film layer. Preferably, the first preset waveband is a waveband corresponding to infrared light. Preferably, the wavelength selective reflection layer 40 covers each light emitting diode 21. In this way, the wavelength selective reflection layer 40 can reflect the infrared light in the ambient light, thereby preventing the infrared light in the ambient light from entering the display assembly 99. Since most of the light contained in the ambient light is infrared light, the influence of ambient light on the heat of the display assembly 99 can be greatly reduced, and the infrared light is invisible to the human eye, and it will not be affected by the infrared light reflected by the wavelength selective reflection layer 40. View the effect.

In some feasible embodiments, each light emitting diode 21 is exposed to the wavelength selective reflection layer 40 (as shown in FIG. 2). The wavelength selective reflection layer 40 is a dichroic film layer or is configured as a reflective grating structure. Since the light emitting diode 21 is exposed to the wavelength selective reflection layer 40, the wavelength selective reflection layer 40 can avoid the influence of the wavelength selective reflection layer 40 on the transmittance of the light emitting diode 21.

Please refer to FIG. 3, which is a schematic diagram of the display component 999 of the second embodiment. The difference between the second embodiment and the first embodiment 99 is that the display assembly 999 further includes a wavelength selective absorption layer 50. The wavelength selective absorption layer 50 is disposed between the wavelength selective reflection layer 40 and the protective layer 30, that is, the wavelength selective absorption layer 50 and the wavelength selective reflection layer 40 are sequentially disposed on the light emitting path of the pixel unit 20. The wavelength selective absorption 50 is used for absorbing the ambient light of the second preset wavelength band, which is the wavelength band corresponding to the visible light of the human eye. The wavelength selective absorption layer 50 may be, but is not limited to, colored glass. In this embodiment, the wavelength selective absorption layer 50 covers each light emitting diode 21, and the second preset waveband does not include the waveband corresponding to the light emitted by the light emitting diode 21 (as shown in FIG. 4), which is convenient for manufacturing. Understandably, the colored glass of the wavelength selective absorption layer 50 can be selected according to the color of the light emitted by the light emitting diode 21. For example, the light emitting diode 21 emits green light and green glass is selected; for example, the light emitting diode 21 emits blue light and blue glass is selected. In this embodiment, since the wavelength selective absorption layer 50 can absorb the visible light of the human eye, the visible light of the human eye entering the display assembly 999 is prevented from being reflected and affecting the user's viewing effect. In other feasible embodiments, each light emitting diode 21 is exposed to the wavelength selective absorption layer 50, which can prevent the wavelength selective absorption layer 50 from affecting the light transmittance of the light emitted by the light emitting diode 21. In this embodiment, the wavelength selective reflection layer 40 and the wavelength selective absorption layer 50 are built in the display assembly 99. In some feasible embodiments, the wavelength selective reflection layer 40 and the wavelength selective absorption layer 50 can also be externally hung on the display component 99, and only the wavelength selective absorption layer 50 and the wavelength selective reflection layer 40 are arranged in sequence on the light emitting light of the pixel unit 20. Just on the road.

The display assembly 999 also includes a conductive reflective layer 60. The conductive reflective layer 60 is disposed between the wavelength selective absorption layer 50 and the pixel unit 20, and the light emitting diode 21 is exposed on the conductive reflective layer 60. The conductive reflective layer 60 is used to reflect ambient light incident on the conductive reflective layer, and can enhance the brightness of the display assembly 999.

Please refer to FIG. 5, which is a schematic diagram of an electronic device 999 applying the above-mentioned display component 99 according to the first embodiment. The electronic device 999 includes a display assembly 99 and a housing 80 in which the display assembly 99 is fixed. Understandably, the electronic device 999 has a display function. Among them, the electronic device 9999 includes but is not limited to monitors, televisions, computers, notebook computers, tablet computers, wearable devices, etc.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention is also intended to include these modifications and variations.

The above-listed are only preferred embodiments of the present invention, which of course cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

A display assembly includes: a substrate, a plurality of pixel units arranged on the substrate and arranged in an array, and a protective layer arranged on the side of the pixel unit away from the substrate; each pixel unit is provided with a light emitting diode; The protective layer is exposed on the light-emitting surface of the diode, wherein the display assembly further includes:

A wavelength selective reflection layer, the wavelength selective reflection layer is disposed on the light exit path of the pixel unit, the wavelength selective reflection layer is used to reflect the ambient light of a first preset waveband, and the first preset waveband is not for human eyes The band corresponding to visible light.
8. The display assembly of claim 1, wherein the wavelength selective emission layer is formed on a side of the protective layer away from the pixel unit.
8. The display assembly of claim 1, wherein the preset waveband is a waveband corresponding to infrared light.
3. The display assembly of claim 1, wherein the wavelength selective reflection layer covers each of the light emitting diodes.
3. The display assembly of claim 1, wherein each of the light-emitting diodes is exposed to the wavelength selective reflection layer.
8. The display assembly of claim 1, wherein the display assembly further comprises a wavelength selective absorption layer, the wavelength selective absorption layer and the wavelength selective reflection layer are sequentially disposed on the light emitting path of the pixel unit, The wavelength selective absorption layer is used to absorb ambient light in a second preset waveband, and the second preset waveband is a waveband corresponding to visible light of human eyes.
8. The display assembly of claim 6, wherein the wavelength selective absorption layer is formed on the protective layer.
7. The display assembly of claim 6, wherein each of the light emitting diodes is exposed to the wavelength selective absorption layer.
7. The display assembly of claim 6, wherein the wavelength selective absorption layer covers each of the light-emitting diodes, and the second predetermined waveband does not include the waveband corresponding to the light emitted by the light-emitting diodes.
9. The display assembly of claim 9, wherein the display assembly further comprises a conductive reflective layer, the conductive reflective layer is disposed between the wavelength selective absorption layer and the pixel unit, and the light emitting diode It is exposed on the reflective layer, and the conductive reflective layer is used to reflect ambient light incident on the reflective layer.
An electronic device comprising: a housing and a display assembly arranged on the housing, the display assembly comprising a substrate, a plurality of pixel units arranged on the substrate and arranged in an array, and a light emitting path of the pixel units Each pixel unit is provided with a light-emitting diode, and the light-emitting surface of the light-emitting diode exposes the protective layer, wherein the display assembly further includes:

A wavelength selective reflective layer, the wavelength selective reflective layer is arranged on the side of the protective layer away from the pixel unit, the wavelength selective reflective layer is used to reflect ambient light of a first preset wavelength band, the first preset The wave band is the wave band corresponding to the light invisible to the human eye.
11. The electronic device of claim 11, wherein the wavelength selective emission layer is formed on a side of the protective layer away from the pixel unit.
11. The electronic device of claim 11, wherein the preset waveband is a waveband corresponding to infrared light.
11. The electronic device of claim 11, wherein the wavelength selective reflection layer covers each of the light-emitting diodes.
11. The electronic device of claim 11, wherein each of the light-emitting diodes is exposed to the wavelength selective reflection layer.
5. The electronic device according to claim 1, wherein the display assembly further comprises a wavelength selective absorption layer, the wavelength selective absorption layer and the wavelength selective reflection layer are sequentially disposed on the light emitting path of the pixel unit, The wavelength selective absorption layer is used to absorb ambient light in a second preset waveband, and the second preset waveband is a waveband corresponding to visible light of human eyes.
16. The electronic device of claim 16, wherein the wavelength selective absorption layer is formed on the protective layer.
16. The electronic device of claim 16, wherein each of the light-emitting diodes is exposed to the wavelength selective absorption layer.
16. The electronic device of claim 16, wherein the wavelength selective absorption layer covers each of the light-emitting diodes, and the second predetermined waveband does not include the waveband corresponding to the light emitted by the light-emitting diodes.
The electronic device of claim 19, wherein the display assembly further comprises a conductive reflective layer, the conductive reflective layer is disposed between the wavelength selective absorption layer and the pixel unit, and the light emitting diode It is exposed on the reflective layer, and the conductive reflective layer is used to reflect ambient light incident on the reflective layer.