Light emitting panel

Abstract

The application provides a light-emitting panel; the light-emitting panel comprises a driving substrate, a light-emitting unit and a plurality of quantum layers. The light-emitting unit is arranged on one side of the driving substrate and is used for emitting light; the light-emitting unit is configured to be capable of controlling the angle and direction of the emitted light; the plurality of quantum layers are arranged on the side of the driving substrate facing the light-emitting unit and surround the light-emitting unit; the plurality of quantum layers comprise a first quantum layer, a second quantum layer and a third quantum layer; and the light emitted by the light-emitting unit can be converted into light of a first color, light of a second color and light of a third color by the first quantum layer, the second quantum layer and the third quantum layer respectively. The light-emitting panel reduces the required number of light-emitting chips and the size of the lamp beads, effectively reduces the power consumption and the heat generation; in addition, more light-emitting units can be arranged in the same space, and the display resolution is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a light-emitting panel. Background Technology

[0002] With the improvement of people's living standards, LCD displays have become an indispensable part of everyone's life. Information transmission in fields such as home office, transportation, machinery manufacturing, and aerospace all require display control. However, consumers are also becoming more and more demanding of display products, such as narrow bezels, ultra-thin design, high brightness, low power consumption, high contrast, and high color gamut.

[0003] Current LCD displays generally consist of an LCD panel and a backlight, and have developed RGB light-emitting diode (LED) field sequence display technology (which achieves full-color display by rapidly switching RGB light sources and utilizing the persistence of vision effect of the human eye). This technology eliminates the need for color filters, increasing the transmittance of optical components to over 20%.

[0004] However, in traditional RGB solutions, RGB LEDs require multiple chips to emit light, resulting in large individual LED sizes and high space requirements. Furthermore, the large number of chips required (e.g., separate chips for red, green, and blue) leads to high power consumption and heat generation when multiple chips operate simultaneously. Additionally, the backlight duty cycle modulation mode of field-sequence display technology (e.g., a single LED needs to switch between bright and dark three times to achieve color mixing) reduces LED lifespan, impacting the overall display effect. Summary of the Invention

[0005] The light-emitting panel provided in this application aims to solve the problems of large LED size, limited space, and high heat generation in existing liquid crystal displays.

[0006] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a light-emitting panel, comprising:

[0007] Drive substrate; A light-emitting unit is disposed on one side of the driving substrate and is used to emit light; the light-emitting unit is configured to control the angle and direction of the emitted light. Multiple quantum dot layers are disposed on the side of the driving substrate facing the light-emitting unit and surrounding the light-emitting unit; The plurality of quantum dot layers include a first quantum dot layer, a second quantum dot layer, and a third quantum dot layer; and the light emitted by the light-emitting unit can be converted by the first quantum dot layer, the second quantum dot layer, and the third quantum dot layer into light of a first color, light of a second color, and light of a third color, respectively.

[0008] In one specific embodiment, a plurality of quantum dot layers surround the light-emitting unit and form a plurality of quantum dot rings; and the plurality of quantum dot rings are arranged sequentially from the inside to the outside from the circumferential edge of the light-emitting unit; wherein each quantum dot ring includes at least two quantum dot layers of different colors; and along the radial direction of the light-emitting unit, the colors of two adjacent quantum dot layers are different; The heights of two adjacent quantum dot rings are different, and the height of the quantum dot ring farther from the light-emitting unit is greater than the height of the quantum dot ring closer to the light-emitting unit.

[0009] In one specific embodiment, the plurality of quantum dot rings include a first quantum dot ring, a second quantum dot ring, and a third quantum dot ring arranged sequentially from the inside out; Wherein, the exit angle of the emitted light entering the first quantum dot ring is less than or equal to 50°; the exit angle of the emitted light entering the second quantum dot ring is greater than 50° and less than or equal to 65°; and the exit angle of the emitted light entering the third quantum dot ring is greater than 65° and less than 90°. The emission angle is the angle between the emitted ray and the driving substrate.

[0010] In one specific embodiment, each of the quantum dot rings includes two quantum dot layers disposed opposite to each other; The first quantum dot ring comprises a first quantum dot layer and a second quantum dot layer; the second quantum dot ring comprises a third quantum dot layer and a first quantum dot layer; and the third quantum dot ring comprises a second quantum dot layer and a third quantum dot layer.

[0011] In one specific embodiment, the height of the inner wall of each quantum dot layer near the light-emitting unit is less than the height of the outer wall away from the light-emitting unit; Along the direction from the outer sidewall of the quantum dot layer toward the inner sidewall, the height of the quantum dot layer gradually decreases; and the top surface of the quantum dot layer bulges to form an arc surface.

[0012] In one specific embodiment, the top wall surface of the quantum dot layer has a plurality of micro-protrusion structures; each of the micro-protrusion structures extends along the circumferential direction of the light-emitting unit; the plurality of micro-protrusion structures are arranged closely in sequence from the top of the inner sidewall of the quantum dot layer to the top of the outer sidewall; The cross-sectional shape of the micro-protrusion structure is serrated; and the surface of the micro-protrusion structure near the light-emitting unit is concave, which is used to reflect part of the incident light toward the light-emitting unit.

[0013] In one specific embodiment, a reflective film is provided on the side of each quantum dot layer away from the light-emitting unit to reflect the light entering the quantum dot layer.

[0014] In one specific embodiment, the light-emitting unit includes: A light-emitting element is disposed on the surface of the driving substrate for emitting light; Multiple light-shielding fan blades are arranged around the light-emitting element and at an angle to the axis of the light-emitting element to form a trumpet-shaped opening, which is used to control the angle and direction of the emitted light. Each of the light-shielding fan blades is configured to independently change its tilt angle relative to the axis of the light-emitting element.

[0015] In one specific embodiment, the light-emitting unit includes a light-emitting element; the light-emitting element includes a first light-emitting element and a plurality of second light-emitting elements disposed around the first light-emitting element; Multiple second light-emitting elements surround the first light-emitting element to form multiple light-emitting element rings; and the multiple light-emitting element rings are arranged sequentially from the inside to the outside along the circumferential edge of the first light-emitting element; In particular, along the direction from the first light-emitting element to the second light-emitting element, the emission angle of the light emitted by the second light-emitting element gradually increases.

[0016] In one specific embodiment, each light-emitting element ring includes a plurality of light-emitting elements spaced apart; and each light-emitting element is configured to emit light individually.

[0017] The beneficial effects of this application's embodiments are as follows: Unlike the prior art, this application's embodiments provide a light-emitting panel; the light-emitting panel includes a driving substrate, a light-emitting unit, and multiple quantum dot layers. The light-emitting unit is disposed on one side of the driving substrate and is used to emit light; the light-emitting unit is configured to control the angle and direction of the emitted light; multiple quantum dot layers are disposed on the side of the driving substrate facing the light-emitting unit and surround the light-emitting unit; the multiple quantum dot layers include a first quantum dot layer, a second quantum dot layer, and a third quantum dot layer; and the light emitted by the light-emitting unit can be converted by the first quantum dot layer, the second quantum dot layer, and the third quantum dot layer into light of a first color, light of a second color, and light of a third color, respectively. By setting up light-emitting units that can control the angle and direction of emitted light, and multiple quantum dot layers surrounding the light-emitting units, the angle and direction of emitted light from the light-emitting units can be controlled so that the emitted light is converted into light of corresponding colors after passing through different quantum dot layers, thereby achieving multi-color light mixing. In this way, one light-emitting unit, together with multiple surrounding quantum dot layers, can achieve multi-color light mixing, reducing the number of light-emitting chips required and the size of the LED beads, effectively reducing power consumption and heat generation. In addition, more light-emitting units can be arranged in the same space, improving display resolution. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a light-emitting panel provided in an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the surface structure of the quantum dot layer in the light-emitting panel shown. Figure 3 for Figure 2 An enlarged view of the micro-protrusion structure shown in the diagram; Figure 4 for Figure 1 A schematic diagram of the structure of the light-emitting element in the light-emitting panel shown; Figure 5 This is a schematic diagram of the structure of the light-emitting element in a light-emitting panel provided in another embodiment of this application.

[0019] Explanation of icon numbers: 1-Driving substrate; 2-Light-emitting unit; 3-Quantum dot layer; 4-Reflective film; 21-Light-emitting element; 22-Light-shielding fan blade; 30-Quantum dot ring; 31-First quantum dot layer; 32-Second quantum dot layer; 33-Third quantum dot layer; 34-Micro-protrusion structure; 210-Light-emitting element ring; 211-First light-emitting element; 212-Second light-emitting element; 301-First quantum dot ring; 302-Second quantum dot ring; 303-Third quantum dot ring. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] See Figure 1 , Figure 1 This is a schematic diagram of the structure of a light-emitting panel provided in an embodiment of this application; this embodiment of the application provides a light-emitting panel that can be applied to the backlight module of a liquid crystal display. The light-emitting panel may include a driving substrate 1, a light-emitting unit 2, and multiple quantum dot layers 3.

[0025] The light-emitting unit 2 is disposed on one side surface of the driving substrate 1 and is used to emit light. A thin-film transistor array is disposed within the driving substrate 1 to control the light-emitting unit 2 to emit light. Specifically, the light-emitting unit 2 may include a light-emitting chip, which is electrically connected to the thin-film transistor array within the driving substrate 1 and emits light when powered on. Specifically, the light-emitting chip may be a blue LED chip, emitting blue light when powered on; the light-emitting side of the light-emitting chip may be covered with a layer of phosphor to convert the light-emitting chip into white light.

[0026] Multiple quantum dot layers 3 are disposed on the side of the driving substrate 1 facing the light-emitting unit 2 and surrounding the light-emitting unit 2. They are used to convert the light emitted by the light-emitting unit 2 into light of different colors, so as to mix and form the colored light required for displaying the image. Specifically, the quantum dot layer 3 refers to a layer made of quantum dot material that can absorb incident light and convert it into light of a specific color.

[0027] The multiple quantum dot layers 3 include a first quantum dot layer 31, a second quantum dot layer 32, and a third quantum dot layer 33; and the light emitted by the light-emitting unit 2 can be converted into light of a first color, a second color, and a third color by the first quantum dot layer 31, the second quantum dot layer 32, and the third quantum dot layer 33, respectively. Specifically, the quantum dots in the first quantum dot layer 31, the second quantum dot layer 32, and the third quantum dot layer 33 have different sizes to convert white light into light of different colors.

[0028] Specifically, the first color of light can be red light, the second color of light can be green light, and the third color of light can be blue light; that is, the light emitted by the light-emitting unit 2 can be converted into red light by the first quantum dot layer 31, into green light by the second quantum dot layer 32, and into blue light by the third quantum dot layer 33, respectively.

[0029] Each light-emitting unit 2 corresponds to a pixel, and the light converted by multiple quantum dot layers 3 corresponding to each light-emitting unit 2 is mixed to form the light-emitting color of the corresponding pixel.

[0030] The light-emitting unit 2 is configured to control the angle and direction of the emitted light to direct the light to different quantum dot layers 3, thereby controlling the amount of light converted by each quantum dot layer 3, and thus controlling the light emission color of each pixel.

[0031] This embodiment of the application, by setting a light-emitting unit 2 capable of controlling the angle and direction of emitted light, and multiple quantum dot layers 3 surrounding the light-emitting unit 2, allows the emitted light to be converted into corresponding colors after passing through different quantum dot layers 3, thereby achieving multi-color light mixing. In this way, one light-emitting unit 2, in conjunction with multiple surrounding quantum dot layers 3, can achieve multi-color light mixing, reducing the number of light-emitting chips required and the size of the LED beads, effectively reducing power consumption and heat generation. Furthermore, more light-emitting units 2 can be arranged in the same space, improving display resolution. Compared to the backlight duty cycle modulation mode of field-sequence display technology, where a single LED bead needs to switch between on and off three times to achieve color mixing, this embodiment of the application, by controlling the angle of emitted light to change the emitted color, only requires a single LED bead to be on and off simultaneously, effectively extending the lifespan of the LED beads.

[0032] like Figure 1As shown, in a specific embodiment, multiple quantum dot layers 3 can form multiple quantum dot rings 30 around the light-emitting unit 2, each quantum dot ring 30 being ring-shaped and surrounding the light-emitting unit 2; and the multiple quantum dot rings 30 are arranged sequentially from the inside to the outside of the circumferential edge of the light-emitting unit 2. Specifically, the innermost quantum dot ring 30 is fitted onto the circumferential edge of the light-emitting unit 2, and the outermost quantum ring is fitted onto the circumferential edge of the innermost quantum dot ring 30.

[0033] Each quantum dot ring 30 includes at least two quantum dot layers 3 of different colors. Specifically, the light-emitting panel may include three quantum dot rings 30, and each quantum dot ring 30 may include two quantum dot layers 3 of different colors. This ensures that in each of the multiple quantum dot layers 3 corresponding to each light-emitting unit 2, each color of quantum dot layer 3 is composed of two quantum dot layers 3 located on different quantum dot rings 30, thereby allowing light of the same color to be formed by the conversion of quantum dot layers 3 located on different quantum dot rings 30.

[0034] Specifically, the heights of adjacent quantum dot rings 30 are different, and the height of the quantum dot ring 30 farther from the light-emitting unit 2 is greater than the height of the quantum dot ring 30 closer to the light-emitting unit 2; that is, the height of the outer quantum dot ring 30 is greater than the height of the inner quantum dot ring 30. This allows white light at different emission angles to illuminate the quantum dot layers 3 at different heights, where it is absorbed and converted into different colors of light by the quantum dot layers 3.

[0035] Specifically, such as Figure 1 As shown, the plurality of quantum dot rings 30 may include a first quantum dot ring 301, a second quantum dot ring 302, and a third quantum dot ring 303 arranged sequentially from the inside out; wherein, the first quantum dot ring 301 is located on the inside, the third quantum dot ring 303 is located on the outside, and the second quantum dot ring 302 is located between the first quantum dot ring 301 and the third quantum dot ring 303. That is, the height 'a' of the third quantum dot ring 303 is greater than the height 'b' of the second quantum dot ring 302, and the height 'b' of the second quantum dot ring 302 is greater than the height 'c' of the first quantum dot ring 301.

[0036] The light rays with the largest emission angle can strike the inner first quantum dot ring 301, where they are absorbed by the quantum dot layer 3 and converted into light of the corresponding color. Light rays with smaller emission angles can pass over the top of the inner first quantum dot ring 301 and strike the middle second quantum dot ring 302, where they are absorbed by the quantum dot layer 3 and converted into light of the corresponding color. Light rays with the smallest emission angle can also pass over the top of the middle second quantum dot ring 302 and strike the outer third quantum dot ring 303, where they are absorbed by the quantum dot layer 3 and converted into light of the corresponding color.

[0037] Specifically, along the radial direction of the light-emitting unit 2, that is, in the direction from the first quantum dot ring 301 to the third quantum dot ring 303, the colors of two adjacent quantum dot layers 3 are different, so that the colors of the light generated by the two adjacent quantum dot rings 30 are different, thereby making it easier to control the color composition of the mixed light by controlling the angle of the emitted light from the light-emitting unit 2.

[0038] Of course, in other embodiments, the light-emitting panel may also include two quantum dot rings 30, each quantum dot ring 30 may include three quantum dot layers 3 of different colors, as long as they can form three sets of quantum dot layers 3 of different colors.

[0039] Continue reading Figure 1 In a specific embodiment, the exit angle α of the light rays entering the first quantum dot ring 301 is less than or equal to 50°; the exit angle β of the light rays entering the second quantum dot ring 302 is greater than or equal to 50° and less than or equal to 65°; and the exit angle γ of the light rays entering the third quantum dot ring 303 is greater than or equal to 65° and less than 90°. By pre-setting the exit angle of the light rays entering different quantum dot rings 30, the amount of light rays illuminating different quantum dot rings 30 is controlled, so that the light rays converted by the quantum dot layers 3 on different quantum dot rings 30 are more uniform.

[0040] Specifically, the exit angle α of the light rays entering the first quantum dot ring 301 can be any value among 10°, 20°, 30°, 40°, and 50°; the exit angle β of the light rays entering the second quantum dot ring 302 can be any value among 50°, 53°, 55°, 60°, and 65°; and the exit angle γ of the light rays entering the third quantum dot ring 303 can be any value among 65°, 70°, 75°, 80°, and 89°.

[0041] It can be understood that the emission angle is the angle between the emitted light and the driving substrate 1; that is, the angle between the emitted light entering the first quantum dot ring 301 and the driving substrate 1 is less than or equal to 50°; the angle between the emitted light entering the second quantum dot ring 302 and the driving substrate 1 is greater than or equal to 50° and less than or equal to 65°; and the angle between the emitted light entering the third quantum dot ring 303 and the driving substrate 1 is greater than or equal to 65° and less than 90°.

[0042] Thus, by controlling the angle and direction of the emitted light from the light-emitting unit 2, only specific quantum dot layers 3 can receive the emitted light and convert it into light of a specific color, thereby achieving control over the emitted color of the pixel.

[0043] like Figure 1As shown, in a specific embodiment, each quantum dot ring 30 may include two quantum dot layers 3 arranged opposite to each other, so that the emitted light from the light-emitting unit 2 is at the same emission angle, and the color of the light converted by the quantum dot layer 3 can be changed by controlling the emission direction.

[0044] The first quantum dot ring 301 may include a first quantum dot layer 31 and a second quantum dot layer 32 arranged opposite to each other; the second quantum dot ring 302 may include a third quantum dot layer 33 and a first quantum dot layer 31 arranged opposite to each other; and the third quantum dot ring 303 may include a second quantum dot layer 32 and a third quantum dot layer 33 arranged opposite to each other.

[0045] The first quantum dot layer 31 converts white light into red light, the second quantum dot layer 32 converts white light into green light, and the third quantum dot layer 33 converts white light into blue light. It can be understood that by placing the third quantum dot layer 33 on top of the second quantum dot ring 302 and the third quantum dot ring 303, the height of the blue-light-emitting third quantum dot layer 33 is maximized, meaning its volume is maximized. Thus, by increasing the volume of the third quantum dot layer 33, its lifespan is increased.

[0046] Specifically, such as Figure 1 As shown, on one side of the light-emitting unit 2, along the direction from the first quantum dot ring 301 to the third quantum dot ring 303, the first quantum dot layer 31, the third quantum dot layer 33, and the second quantum dot layer 32 are arranged in sequence; while on the other side of the light-emitting unit 2, along the direction from the first quantum dot ring 301 to the third quantum dot ring 303, the second quantum dot layer 32, the first quantum dot layer 31, and the third quantum dot layer 33 are arranged in sequence.

[0047] like Figure 1 As shown, in a specific embodiment, the height of the inner wall of each quantum dot layer 3 near the light-emitting unit 2 is less than the height of the outer wall away from the light-emitting unit 2. This allows the emitted light from the light-emitting unit 2 to reach the outer wall of the quantum dot layer 3 after entering from the lower inner wall. This increases the optical path length of the emitted light from the light-emitting unit 2 within the quantum dot layer 3, thereby enhancing the absorption and conversion of the emitted light by the quantum dot layer 3 and effectively improving the light utilization rate.

[0048] Specifically, the inner wall of the quantum dot layer 3 is the side of the quantum dot layer 3 closest to the light-emitting unit 2, and the height of the inner wall of the quantum dot layer 3 refers to the distance between the end of the inner wall away from the driving substrate 1 and the driving substrate 1. The outer wall refers to the side of the quantum dot layer 3 away from the light-emitting unit 2, and the height of the outer wall refers to the distance between the end of the outer wall away from the driving substrate 1 and the driving substrate 1.

[0049] Specifically, along the direction from the outer sidewall to the inner sidewall of the quantum dot layer 3, the height of the quantum dot layer 3 gradually decreases, and the top surface of the quantum dot layer 3 is raised to form an arc surface, which allows light to penetrate the surface of the quantum dot layer 3 at a smaller angle when incident, reducing light reflection loss; and setting the top wall of the quantum dot layer 3 as an arc surface can also increase the contact area between the surface of the quantum dot layer 3 and the emitted light, further increasing the amount of transmitted light and improving optical conversion efficiency.

[0050] See Figures 2-3 , Figure 2 for Figure 1 A schematic diagram of the surface structure of the quantum dot layer in the light-emitting panel shown. Figure 3 for Figure 2 An enlarged view of the micro-protrusion structure in the shown structure. (See image below.) Figure 2 As shown, in a specific embodiment, the top surface of the quantum dot layer 3 also has multiple micro-protrusion structures 34 to increase the contact area between the surface of the quantum dot layer 3 and the emitted light, further increasing the amount of transmitted light, which is beneficial to improving optical conversion efficiency and reducing light loss.

[0051] Combination Figures 1-3 Specifically, each micro-protrusion structure 34 extends along the circumferential direction of the light-emitting unit 2, forming an arc-shaped micro-protrusion structure 34 surrounding the light-emitting unit 2 on the surface of the quantum dot layer 3. Furthermore, on the same horizontal plane, multiple arc-shaped micro-protrusion structures 34 located on the same quantum dot ring 30 form a ring-shaped micro-protrusion structure 34 surrounding the light-emitting unit 2. On the same quantum dot layer 3, multiple micro-protrusion structures 34 are arranged closely from the top of the inner wall to the top of the outer wall, forming a dense micro-protrusion structure 34 on the surface of the quantum dot layer 3, maximizing the contact area with the emitted light.

[0052] like Figure 3 As shown, in a specific embodiment, the cross-sectional shape of the micro-protrusion structure 34 is serrated; and the surface of the micro-protrusion structure 34 near the light-emitting unit 2 is concave, which is used to reflect part of the incident light to the light-emitting unit 2 so as to reuse the reflected light and further improve the light utilization rate.

[0053] Specifically, in the light reflected from the concave surface of the micro-protrusion structure 34 to the light-emitting unit 2, some of the light is directly reflected by the light-emitting unit 2 onto the optical path of the mixed light to increase the brightness of the mixed light; while some of the light is reflected onto other quantum dot layers 3 so that these quantum dot layers 3 can absorb and convert it into light of the corresponding color, so as to achieve the purpose of secondary utilization.

[0054] like Figure 1As shown, in a specific embodiment, a reflective film 4 is provided on the side of each quantum dot layer 3 away from the light-emitting unit 2 to reflect the light entering the quantum dot layer 3, so as to prevent the light converted by the inner quantum dot layer 3 from entering the outer quantum dot layer 3 again and being absorbed and converted, resulting in impure light color.

[0055] In other embodiments, the light-emitting unit 2 may also include only a blue LED chip to directly emit blue light to the quantum dot layer and the outside world. The multiple quantum dot layers 3 may also include only a first quantum dot layer 31 and a second quantum dot layer 32; and the blue light emitted by the light-emitting unit 2 can be converted into red light by the first quantum dot layer 31 and the second quantum dot layer 32, respectively. The red and green light converted by the first quantum dot layer 31 and the second quantum dot layer 32, and the blue light directly emitted by the blue LED chip, mix to form the light-emitting color of the corresponding pixel.

[0056] Specifically, in these embodiments, the emission angle of the emitted light from the light-emitting unit 2 is less than or equal to 80°; specifically, the emission angle can be any value among 10°, 30°, 50°, 65°, and 80°. Thus, by reducing the maximum emission angle of the emitted light, the proportion of vertically emitted blue light in the emitted light from the light-emitting unit 2 is reduced, thereby lowering the blue light content in the mixed light; furthermore, this avoids the problem of excessive blue light content causing the overall light emission color of the pixels to be too bluish due to a large amount of blue light being emitted vertically.

[0057] See Figure 4 , Figure 4 for Figure 1 The diagram shows the structure of the light-emitting element in the light-emitting panel. In a specific embodiment, the light-emitting unit 2 may include a light-emitting element 21 and multiple light-shielding fan blades 22. The light-emitting element 21 is disposed on the surface of the driving substrate 1 and is used to emit light. Specifically, the light-emitting element 21 may include a blue light-emitting chip for emitting a monochromatic light source, and phosphor disposed on the surface of the light-emitting chip for converting the blue light emitted by the blue light-emitting chip into white light.

[0058] Multiple light-shielding fan blades 22 are externally mounted around the light-emitting element 21, and each light-shielding fan blade 22 is inclined to the axis M of the light-emitting element 21, so that the multiple light-shielding fan blades 22 surrounding the light-emitting unit 2 form a trumpet-shaped opening. The multiple light-shielding fan blades 22 are used to control the angle and direction of the emitted light; specifically, the light-shielding fan blades 22 can cover part of the light path of the emitted light to block the emitted light on that part of the light path from entering the quantum dot layer 3, thereby realizing the control of the angle and direction of the emitted light.

[0059] Each light-shielding fan blade 22 is configured to independently change its tilt angle relative to the axis M of the light-emitting element 21, thereby freely changing the specific shape of the trumpet-shaped opening to precisely control the angle and direction of the emitted light. Specifically, a micro servo motor can be used to drive the base of each light-shielding fan blade 22, and the rotation angle can be controlled by an electrical signal to achieve precise adjustment; alternatively, the light-shielding fan blade 22 can be made of a flexible polymer material, changing its shape through electrostriction to adapt to different angle requirements.

[0060] Combination Figure 1 and Figure 4 Taking green light as an example, the deflection of the shading fan blades 22 can be controlled to block the light. Figure 1 The first quantum dot ring 301 and the second quantum dot ring 302 on the left side simultaneously block all the quantum dot rings 30 on the right side, so that the light emitted by the light-emitting element 21 can only be absorbed by the second quantum dot layer 32 on the third quantum dot ring 303 and converted into green light.

[0061] Specifically, the tilt angle θ between the axis of the light-shielding fan blade 22 and the axis of the light-emitting element 21 is greater than 10° and less than 55°, so that the light-shielding fan blade 22 can cover the entire optical path range of the emitted light rays incident on the quantum dot layer 3, so that the control of the angle and direction of the emitted light rays by the light-shielding fan blade 22 can meet all requirements. Specifically, the tilt angle θ between the axis of the light-shielding fan blade 22 and the axis of the light-emitting element 21 can be any value among 10°, 25°, 40°, and 55°.

[0062] See Figure 5 , Figure 5 This is a schematic diagram of the structure of a light-emitting element in a light-emitting panel according to another embodiment of this application. In another embodiment of this application, the light-emitting unit 2 may only include a light-emitting element 21, and the angle and direction of the emitted light can be directly controlled by controlling the light-emitting element 21, eliminating the need for external light-shielding fan blades, simplifying the structure of the light-emitting panel, and reducing the overall thickness of the light-emitting surface. Specifically, the light-emitting element 21 may also include a blue light-emitting chip for emitting a monochromatic light source, and phosphor on the surface of the light-emitting chip.

[0063] Specifically, the light-emitting element 21 may include a first light-emitting element 211 and a plurality of second light-emitting elements 212 arranged around the first light-emitting element 211.

[0064] The first light-emitting element 211 has its light-emitting surface parallel to the driving substrate 1 and is used to emit white light in a direction perpendicular to the driving substrate 1 to enhance the brightness of the light emission. The light-emitting surfaces of a plurality of second light-emitting elements 212 are inclined to the driving substrate 1 and are used to emit light to the quantum dot layer 3, which is then converted by the quantum dot layer 3 to form mixed light.

[0065] Multiple second light-emitting elements 212 rings 210 surround the first light-emitting element 211 to form multiple light-emitting element rings 210; and the multiple light-emitting element rings 210 are arranged sequentially from the inside to the outside on the circumferential edge of the first light-emitting element 211; wherein, along the direction from the first light-emitting element 211 to the second light-emitting element 212, the emission angle of the light emitted by the second light-emitting element 212 gradually increases, so as to achieve precise control of the emission angle of the emitted light by selecting second light-emitting elements 212 with different emission angles.

[0066] Specifically, the number of light-emitting element rings 210 can be six. Among them, the second light-emitting element 212 on the light-emitting element ring 210 closest to the first light-emitting element 211 has the largest tilt angle between its light-emitting surface and the driving substrate 1, so as to minimize the emission angle of the emitted light. The second light-emitting element 212 on the light-emitting element ring 210 farthest from the first light-emitting element 211 has the smallest tilt angle between its light-emitting surface and the driving substrate 1, so as to maximize the emission angle of the emitted light. It can be understood that, along the direction from the inside to the outside, the tilt angle between the light-emitting surface of the middle second light-emitting element 212 and the driving substrate 1 gradually decreases, while the emission angle gradually increases.

[0067] Among them, the two inner light-emitting element rings 210 have the smallest emission angle and correspond to the first quantum dot ring 301 closest to the light-emitting unit 2. The light emitted by the two inner light-emitting element rings 210 can illuminate the first quantum dot ring 301 and be converted into light of the corresponding color by the quantum dot layer 3 on the first quantum dot ring 301.

[0068] The two outer light-emitting element rings 210 have the largest emission angle and correspond to the third quantum dot ring 303, which is furthest from the light-emitting unit 2. The light emitted by the two outer light-emitting element rings 210 can illuminate the third quantum dot ring 303 and be converted into light of the corresponding color by the quantum dot layer 3 on the third quantum dot ring 303.

[0069] The emission angles of the two light-emitting element rings 210 located in the middle are also centered, corresponding to the second quantum dot ring 302 located in the middle, and are converted into light of the corresponding color by the quantum dot layer 3 on the second quantum dot ring 302.

[0070] Furthermore, each light-emitting element ring 210 includes a plurality of light-emitting elements 21 spaced apart; and each light-emitting element 21 is configured to emit light individually, so as to control the direction of emitted light by selecting different light-emitting elements 21 located on the same light-emitting element ring 210 to emit light, so that the light emitted by different light-emitting elements 21 can be directed to different quantum dot layers 3 located on the same quantum dot ring 30, thereby converting into light of the corresponding color.

[0071] This application provides a light-emitting panel; the light-emitting panel includes a driving substrate 1, a light-emitting unit 2, and multiple quantum dot layers. The light-emitting unit 2 is disposed on one side of the driving substrate 1 and is used to emit light; the light-emitting unit 2 is configured to control the angle and direction of the emitted light; multiple quantum dot layers 3 are disposed on the side of the driving substrate 1 facing the light-emitting unit 2 and surround the light-emitting unit 2; the multiple quantum dot layers 3 include a first quantum dot layer 31, a second quantum dot layer 32, and a third quantum dot layer 33; and the light emitted by the light-emitting unit 2 can be converted by the first quantum dot layer 31, the second quantum dot layer 32, and the third quantum dot layer 33 into light of a first color, light of a second color, and light of a third color, respectively. By setting up a light-emitting unit 2 that can control the angle and direction of emitted light, and multiple quantum dot layers 3 surrounding the light-emitting unit 2, the emitted light can be converted into light of corresponding colors after passing through different quantum dot layers 3, thereby achieving multi-color light mixing. In this way, one light-emitting unit 2, together with multiple surrounding quantum dot layers 3, can achieve multi-color light mixing, reducing the number of light-emitting chips required and the size of the LED beads, effectively reducing power consumption and heat generation. Furthermore, more light-emitting units 2 can be arranged in the same space, improving display resolution. Compared to the backlight duty cycle modulation mode of field-sequence display technology, where a single LED bead needs to switch between bright and dark three times to achieve color mixing, this embodiment of the application, by controlling the angle of emitted light to change the emitted color, only requires a single LED bead to be bright and dark simultaneously, effectively extending the lifespan of the LED beads.

[0072] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A light-emitting panel, characterized in that, include: Drive substrate; A light-emitting unit is disposed on one side of the driving substrate and is used to emit light; the light-emitting unit is configured to control the angle and direction of the emitted light. Multiple quantum dot layers are disposed on the side of the driving substrate facing the light-emitting unit and surrounding the light-emitting unit; The plurality of quantum dot layers include a first quantum dot layer, a second quantum dot layer, and a third quantum dot layer; and the light emitted by the light-emitting unit can be converted by the first quantum dot layer, the second quantum dot layer, and the third quantum dot layer into light of a first color, light of a second color, and light of a third color, respectively.

2. The light-emitting panel according to claim 1, characterized in that, Multiple quantum dot layers surround the light-emitting unit and form multiple quantum dot rings; and the multiple quantum dot rings are arranged sequentially from the inside to the outside from the circumferential edge of the light-emitting unit; wherein each quantum dot ring includes at least two quantum dot layers of different colors; and along the radial direction of the light-emitting unit, the colors of two adjacent quantum dot layers are different; The heights of two adjacent quantum dot rings are different, and the height of the quantum dot ring farther from the light-emitting unit is greater than the height of the quantum dot ring closer to the light-emitting unit.

3. The light-emitting panel according to claim 2, characterized in that, The plurality of quantum dot rings include a first quantum dot ring, a second quantum dot ring, and a third quantum dot ring arranged sequentially from the inside out; Wherein, the exit angle of the emitted light entering the first quantum dot ring is less than or equal to 50°; the exit angle of the emitted light entering the second quantum dot ring is greater than 50° and less than or equal to 65°; and the exit angle of the emitted light entering the third quantum dot ring is greater than 65° and less than 90°. The emission angle is the angle between the emitted ray and the driving substrate.

4. The light-emitting panel according to claim 3, characterized in that, Each of the quantum dot rings comprises two quantum dot layers disposed opposite to each other; The first quantum dot ring comprises a first quantum dot layer and a second quantum dot layer; the second quantum dot ring comprises a third quantum dot layer and a first quantum dot layer; and the third quantum dot ring comprises a second quantum dot layer and a third quantum dot layer.

5. The light-emitting panel according to claim 2, characterized in that, The height of the inner wall of each quantum dot layer near the light-emitting unit is less than the height of the outer wall away from the light-emitting unit; Along the direction from the outer sidewall of the quantum dot layer toward the inner sidewall, the height of the quantum dot layer gradually decreases; and the top surface of the quantum dot layer is raised to form an arc surface.

6. The light-emitting panel according to claim 5, characterized in that, The top wall surface of the quantum dot layer has multiple micro-protrusion structures; each of the micro-protrusion structures extends along the circumferential direction of the light-emitting unit; the multiple micro-protrusion structures are arranged closely in sequence from the top of the inner wall of the quantum dot layer to the top of the outer wall. The cross-sectional shape of the micro-protrusion structure is serrated; and the surface of the micro-protrusion structure near the light-emitting unit is concave, which is used to reflect part of the incident light toward the light-emitting unit.

7. The light-emitting panel according to claim 1, characterized in that, Each quantum dot layer has a reflective film on the side of its surface away from the light-emitting unit to reflect the light entering the quantum dot layer.

8. The light-emitting panel according to any one of claims 1-7, characterized in that, The light-emitting unit includes: A light-emitting element is disposed on the surface of the driving substrate for emitting light; Multiple light-shielding fan blades are arranged around the light-emitting element and at an angle to the axis of the light-emitting element to form a trumpet-shaped opening, which is used to control the angle and direction of the emitted light. Each of the light-shielding fan blades is configured to independently change its tilt angle relative to the axis of the light-emitting element.

9. The light-emitting panel according to any one of claims 1-7, characterized in that, The light-emitting unit includes a light-emitting element; the light-emitting element includes a first light-emitting element and a plurality of second light-emitting elements arranged around the first light-emitting element; Multiple second light-emitting elements surround the first light-emitting element to form multiple light-emitting element rings; and the multiple light-emitting element rings are arranged sequentially from the inside to the outside along the circumferential edge of the first light-emitting element; In particular, along the direction from the first light-emitting element to the second light-emitting element, the emission angle of the light emitted by the second light-emitting element gradually increases.

10. The light-emitting panel according to claim 9, characterized in that, Each light-emitting element ring includes multiple light-emitting elements spaced apart; and each light-emitting element is configured to emit light independently.

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