Display device and manufacturing method thereof

Abstract

The invention provides a display device and a manufacturing method thereof. The display device includes: a circuit substrate; the light-emitting unit is arranged on the circuit substrate and comprises a first light-emitting unit and a second light-emitting unit; the light collecting structure comprises a first light collecting structure and a second light collecting structure, the first light collecting structure corresponds to the first light emitting unit, and the second light collecting structure corresponds to the second light emitting unit; in the overlook direction, a first distance exists between the center of the first light emitting unit and the center of the first light collecting structure, a second distance exists between the center of the second light emitting unit and the center of the second light collecting structure, the first light collecting structure has a first diameter, and the first distance, the second distance and the first diameter meet the following formula: C1 is the first distance, and C2 is the second distance. C2 is the second distance, D1 is the first diameter, and C1 and C2 are not equal to 0.

Description

Technical Field

[0001] This invention relates to a display device and its manufacturing method, specifically a display device having a light-collecting structure and its manufacturing method. Background Technology

[0002] Light emitting diode (LED) displays have advantages such as fast response speed, energy saving, low power consumption, long lifespan, and good contrast, and are considered to be one of the most promising displays for future development.

[0003] However, the wide light emission angle of an LED may result in insufficient brightness, affecting visual effects. Increasing the current to increase light intensity would increase power consumption. Furthermore, the high temperatures during the manufacturing process can easily damage the LED, leading to decreased product yield or increased production costs.

[0004] Therefore, there is an urgent need to provide a display device and its manufacturing method in order to improve the existing defects. Summary of the Invention

[0005] This invention provides a display device, characterized in that it comprises: a circuit substrate; a plurality of light-emitting units disposed on the circuit substrate, wherein the light-emitting units include a first light-emitting unit and a second light-emitting unit; and a plurality of light-collecting structures, including a first light-collecting structure and a second light-collecting structure, wherein the first light-collecting structure corresponds to the first light-emitting unit, and the second light-collecting structure corresponds to the second light-emitting unit; wherein, in a top-view direction, there is a first distance between the center of the first light-emitting unit and the center of the first light-collecting structure, and there is a second distance between the center of the second light-emitting unit and the center of the second light-collecting structure, and the first light-collecting structure has a first diameter, wherein the first distance, the second distance, and the first diameter satisfy the following formula:

[0006]

[0007] Where C1 is the first distance, C2 is the second distance, and D1 is the first diameter, and C1 and C2 are not equal to 0.

[0008] The present invention also provides a method for manufacturing a display device, characterized by comprising the following steps: providing a lens substrate, wherein the lens substrate includes a substrate and a plurality of light-collecting structures formed on the substrate; providing a panel, wherein the panel includes a circuit substrate and a plurality of light-emitting units disposed on the circuit substrate; and assembling the lens substrate and the panel such that each of the light-emitting units corresponds to one of the light-collecting structures. Attached Figure Description

[0009] Figure 1 This is a top view schematic diagram of a partial display device according to an embodiment of the present invention.

[0010] Figure 2 This is a cross-sectional schematic diagram of a partial display device according to an embodiment of the present invention.

[0011] Figure 3 This is a cross-sectional schematic diagram of a partial display device according to an embodiment of the present invention.

[0012] Figure 4 This is a cross-sectional schematic diagram of a partial display device according to an embodiment of the present invention.

[0013] Figure 5 This is a cross-sectional schematic diagram of a partial display device according to an embodiment of the present invention.

[0014] Figures 6A to 6D This is a schematic diagram illustrating the fabrication of a display device according to an embodiment of the present invention.

[0015] Figure 7 This is a top view schematic diagram of a partial display device according to an embodiment of the present invention.

[0016] Figure 8 This is a light emission pattern diagram of a display device according to an embodiment of the present invention.

[0017] Figure 9 This is a schematic diagram of a display device according to an embodiment of the present invention applied to an automotive display.

[0018] Figure 10 This is a top view schematic diagram of a partial display device according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 100 display devices

[0021] 1 panel

[0022] 11 Circuit Substrate

[0023] 11e1 First Edge

[0024] 11e2 Second Edge

[0025] 12 light-emitting units

[0026] 12A First Light Emitting Unit

[0027] 12B Second Light Emitting Unit

[0028] 12C third light-emitting unit

[0029] 2 Lens Substrate

[0030] 21 substrate

[0031] 22 First Material Layer

[0032] 22a surface

[0033] 221 Recess

[0034] 222 Flat section

[0035] 23 Second Material Layer

[0036] 231 light-collecting structure

[0037] 231A First Light-Collecting Structure

[0038] 231B Second Light-Collecting Structure

[0039] 231C Third Light-Collecting Structure

[0040] 3 Third material layer

[0041] 4-Optical Angle Controller

[0042] E-eye

[0043] L is the direction from which the strongest light comes out.

[0044] N normal

[0045] P pixels

[0046] S1 spacer

[0047] S2 another spacer

[0048] C1 First Distance

[0049] C2 second distance

[0050] C3 Third Distance

[0051] D1 First Diameter

[0052] D2 Second Diameter

[0053] D3 third diameter

[0054] D4, D5, D6 sizes

[0055] ED1 First Extension Direction

[0056] ED2 Second Extension Direction

[0057] ED3 Third Extension Direction

[0058] ED4 extension direction

[0059] H1 First Height

[0060] H2 Second Height

[0061] H3 Third Height

[0062] P1 pixel spacing

[0063] P2 First Subpixel Spacing

[0064] P3 second sub-pixel spacing

[0065] X First Direction

[0066] Y second direction

[0067] Z-view from above

[0068] θ1 light angle Detailed Implementation

[0069] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed for different viewpoints and applications without departing from the spirit of the invention.

[0070] It should be noted that, unless otherwise specified herein, the use of the word "a" element is not limited to having a single element, but may include one or more of the elements. Furthermore, the use of ordinal numbers such as "first" and "second" in the specification and claims to modify elements of a claim does not itself imply or represent any prior ordinal number for that claimed element, nor does it represent the order of one claimed element with another, or the order of manufacturing processes. The use of these ordinal numbers is solely for the purpose of clearly distinguishing one claimed element with a given name from another claimed element with the same name.

[0071] Throughout this specification and the appended claims, certain terms are used to refer to specific elements. Those skilled in the art will understand that electronic device manufacturers may use different names to refer to the same element. This document is not intended to distinguish between elements that have the same function but different names. In the following specification and claims, words such as “comprising,” “containing,” and “having” are open-ended terms and should therefore be interpreted as “containing but not limited to…”. Thus, when the terms “comprising,” “containing,” and / or “having” are used in the description of this invention, they specify the presence of the corresponding feature, area, step, operation, and / or component, but do not exclude the presence of one or more of the corresponding feature, area, step, operation, and / or component.

[0072] In this text, the terms "about," "approximately," "substantially," and "roughly" typically indicate that a given value or range is within 10%, 5%, 3%, 2%, 1%, or 0.5%. The given quantity is an approximate quantity; that is, even without specific mention of "about," "approximately," "substantially," or "roughly," the meaning of these terms is implied. Furthermore, the phrases "range from the first value to the second value" or "range between the first value and the second value" indicate that the range includes the first value, the second value, and other values ​​in between.

[0073] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It is to be understood that these terms, such as those defined in commonly used dictionaries, shall be interpreted as having a meaning consistent with the background or context of the relevant art and the present invention, and shall not be interpreted in an idealized or overly formal manner, unless specifically defined herein.

[0074] Furthermore, relative terms such as "below" or "bottom" and "above" or "top" may be used in the embodiments to describe the relative relationship of one element to another in the figures. It is understood that if the apparatus in the figures is flipped upside down, the element described as being on the "below" side will become the element on the "above" side. When a corresponding component (e.g., a membrane or region) is referred to as "on another component," it can be directly on the other component, or there may be other components between them. On the other hand, when a component is referred to as "directly on another component," there are no components between them. Additionally, when a component is referred to as "on another component," there is a vertical relationship between them in the top view, and this component can be above or below the other component, depending on the orientation of the apparatus.

[0075] In this invention, the thickness, length, width, or distance and angle between components can be measured using an optical microscopy (OM), a scanning electron microscope (SEM), an alpha-step thickness gauge, an elliptic gauge, or other suitable methods. Specifically, according to some embodiments, a scanning electron microscope can be used to obtain cross-sectional images of the structure and measure the thickness, length, width, or distance and angle between components. Furthermore, any two values ​​or directions used for comparison may have a certain degree of error. If the first value equals the second value, it implies an error of approximately 10% between the two values; if the first direction is perpendicular to the second direction, the angle between the first and second directions may be between 80 and 100 degrees; if the first direction is parallel to the second direction, the angle between the first and second directions may be between 0 and 10 degrees.

[0076] The embodiments of the present invention can be used in conjunction with the appendix Figure 1 It should be understood that the accompanying drawings of this invention are also considered part of the disclosure. It should be understood that the drawings of this invention are not drawn to scale; in fact, the dimensions of elements may be arbitrarily enlarged or reduced to clearly illustrate the features of the invention.

[0077] It should be noted that the technical solutions provided in the different embodiments below can be substituted for, combined or mixed with each other to constitute another embodiment without violating the spirit of the present invention.

[0078] The display device of the present invention can be applied to any type of electronic device. The electronic device may include, for example, a light-emitting device, a display device, a sensing device, an antenna device, a touch device, a splicing device, or other suitable electronic devices, but is not limited thereto. The display device of the present invention may include light-emitting diodes, color conversion layers, or other suitable materials, or combinations thereof, but is not limited thereto. The electronic device may be, for example, a bendable, stretchable, foldable, rollable, and / or flexible electronic device, but is not limited thereto. The display device may be applied, for example, to notebook computers, public displays, splicing displays, automotive displays, touch displays, transparent displays, double-sided displays, virtual reality displays, augmented reality displays, 3D displays, monochrome displays, color displays, televisions, monitors, smartphones, tablet computers, light source modules, lighting equipment, military equipment, or, for example, electronic devices applied to the above products, but is not limited thereto. Display devices may include, for example, liquid crystal molecules, light-emitting diodes, color conversion layers, other suitable display media, or combinations thereof, but are not limited thereto. Color conversion layers may include wavelength conversion materials and / or filter materials, and may include, for example, fluorescent materials, phosphorescent materials, quantum dot (QD) materials, other suitable materials, or combinations thereof, but are not limited thereto. Display devices may include liquid crystal display devices, electrophoretic display devices, or other suitable devices, but are not limited thereto. Sensing devices may be, for example, sensing devices for detecting capacitance changes, light, heat, or ultrasound, but are not limited thereto. Sensing devices may include, for example, biosensors, touch sensors, fingerprint sensors, other suitable sensors, or combinations of sensors of the above types. Antenna devices may be, for example, liquid crystal antennas or other types of antennas, but are not limited thereto. Splicing devices may include, for example, splicing display devices or splicing antenna devices, but are not limited thereto. Furthermore, the electronic device can be rectangular, circular, polygonal, have curved edges, curved surfaces, or other suitable shapes. The electronic device may include peripheral systems such as a drive system, a control system, a light source system, and a shelving system. It should be noted that the electronic device of this invention is exemplified by a display device, but the invention is not limited thereto.

[0079] Figure 1 This is a top view schematic diagram of a partial display device according to an embodiment of the present invention. Figure 2 This is a cross-sectional schematic diagram of a partial display device according to an embodiment of the present invention. For ease of explanation... Figure 1 Only some components are shown. In addition, light-emitting units 12 of the same color are represented by the same fill pattern in the figure, and dashed lines indicate that no light-emitting unit 12 is provided at that location.

[0080] In one embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the display device may include: a circuit substrate 11; a plurality of light-emitting units 12 disposed on the circuit substrate 11, wherein each light-emitting unit 12 includes a first light-emitting unit 12A and a second light-emitting unit 12B; and a plurality of light-collecting structures 231, including a first light-collecting structure 231A and a second light-collecting structure 231B, wherein the first light-collecting structure 231A corresponds to the first light-emitting unit 12A, and the second light-collecting structure 231B corresponds to the second light-emitting unit 12B. The light-collecting structure 231 can concentrate the light from the light-emitting unit 12, thereby increasing the light emission intensity of the light-emitting unit 12.

[0081] In this invention, the terms "first light-emitting unit 12A" and "second light-emitting unit 12B" refer, for example, to two light-emitting units 12 with different colors. The color of the light-emitting unit 12 can be, for example, red, green, blue, white, or other suitable colors. In this invention, the term "one light-collecting structure 231 corresponding to one light-emitting unit 12" means, for example, that in the top-view direction Z, the light-collecting structure 231 overlaps with the light-emitting unit 12. For example, in the top-view direction Z, the first light-collecting structure 231A overlaps with the first light-emitting unit 12A, and the second light-collecting structure 231B overlaps with the second light-emitting unit 12B. In one embodiment of this invention, in the top-view direction Z, the light-collecting structures 231 do not overlap with each other.

[0082] In one embodiment of the present invention, such as Figure 1 As shown, there is a pixel spacing P1 between adjacent first light-emitting units 12A, and a first sub-pixel spacing P2 between the first light-emitting unit 12A and the second light-emitting unit 12B. The pixel spacing P1 may be greater than or equal to the first sub-pixel spacing P2. In this invention, the "pixel spacing P1" or "first sub-pixel spacing P2" refers, for example, to the shortest distance between the center points of the two light-emitting units 12 in a top view.

[0083] In one embodiment of the present invention, such as Figure 1 and Figure 2As shown, the light-emitting unit 12 may further include a third light-emitting unit 12C, and the light-collecting structure 231 may further include a third light-collecting structure 231C, wherein the third light-collecting structure 231C corresponds to the third light-emitting unit 12C. In other words, in the top-view direction Z, the third light-collecting structure 231C overlaps with the third light-emitting unit 12C. In this invention, the "third light-emitting unit 12C" refers, for example, to a color different from that of the first light-emitting unit 12A and the second light-emitting unit 12B. In one embodiment of this invention, as... Figure 1 As shown, a second sub-pixel spacing P3 exists between the first light-emitting unit 12A and the third light-emitting unit 12C, wherein the pixel spacing P1 may be greater than or equal to the second sub-pixel spacing P3. In one embodiment of the present invention, as... Figure 1 As shown, the second sub-pixel spacing P3 can be greater than or equal to the first sub-pixel spacing P2, but the present invention is not limited thereto. The "second sub-pixel spacing P3" refers, for example, to the shortest distance between the center points of the two light-emitting units 12 in a top view.

[0084] In one embodiment of the present invention, such as Figure 1 As shown, in the top-view direction Z, the center of the first light-emitting unit 12A and the center of the first light-collecting structure 231A can approximately overlap; in other words, the distance between the center of the first light-emitting unit 12A and the center of the first light-collecting structure 231A can be 0. Similarly, in the top-view direction Z, the center of the second light-emitting unit 12B and the center of the second light-collecting structure 231B can approximately overlap; in other words, the distance between the center of the second light-emitting unit 12B and the center of the second light-collecting structure 231B can be 0. In the top-view direction Z, the center of the third light-emitting unit 12C and the center of the third light-collecting structure 231C can approximately overlap; in other words, the distance between the center of the third light-emitting unit 12C and the center of the third light-collecting structure 231C can be 0.

[0085] In one embodiment of the present invention, such as Figure 1 As shown, in the top-view direction Z, the first light-collecting structure 231A has a first diameter D1, the second light-collecting structure 231B has a second diameter D2, and the third light-collecting structure 231C has a third diameter D3. The first diameter D1, the second diameter D2, and the third diameter D3 may be the same or different from each other, and can be adjusted according to the desired light-collecting effect. In one embodiment of the present invention, as... Figure 2As shown in the cross-sectional view, the light-collecting structures 231 can be semi-circular and each can have a height. For example, the first light-collecting structure 231A has a first height H1, the second light-collecting structure 231B has a second height H2, and the third light-collecting structure 231C has a third height H3. The first height H1, the second height H2, and the third height H3 can be the same or different from each other, and can be adjusted according to the desired light-collecting effect. In one embodiment of the present invention, the first diameter D1 can be greater than the first height H1, the second diameter D2 can be greater than the second height H2, and / or the third diameter D3 can be greater than the third height H3, but the present invention is not limited thereto.

[0086] In one embodiment of the present invention, such as Figure 1 As shown, in the top-view direction Z, the diameter of the light-collecting structure 231 can be larger than the size of the light-emitting unit 12. More specifically, the first diameter D1 of the first light-collecting structure 231A can be larger than the size D4 of the first light-emitting unit 12A, the second diameter D2 of the second light-collecting structure 231B can be larger than the size D5 of the second light-emitting unit 12B, and the third diameter D3 of the third light-collecting structure 231C can be larger than the size D6 of the third light-emitting unit 12C. The "size of the light-emitting unit 12" refers, for example, to the size of the diagonal of the light-emitting unit 12 in the top-view direction Z. In some embodiments, the "size of the light-emitting unit 12" refers, for example, to the maximum distance between any two points of the light-emitting unit 12 in the top-view direction Z, or for example, to the diameter of the light-emitting unit 12. In one embodiment of the present invention, the first diameter D1 of the first light-collecting structure 231A can be greater than or equal to twice the size D4 of the first light-emitting unit 12A (i.e., The second diameter D2 of the second light-collecting structure 231B can be greater than or equal to twice the size D5 of the second light-emitting unit 12B (i.e., And / or the third diameter D3 of the third light-collecting structure 231C may be greater than or equal to twice the size D6 of the third light-emitting unit 12C (i.e., However, the present invention is not limited thereto. In one embodiment of the present invention, the first diameter D1 of the first light-collecting structure 231A, the second diameter D2 of the second light-collecting structure 231B, and the third diameter D3 of the third light-collecting structure 231C are less than or equal to the pixel pitch P1. For example, the first diameter D1 of the first light-collecting structure 231A, the second diameter D2 of the second light-collecting structure 231B, and the third diameter D3 of the third light-collecting structure 231C are less than or equal to 1 / 2 times the pixel pitch P1, but are not limited thereto.

[0087] In one embodiment of the present invention, such as Figure 2 As shown, the display device may further include a first material layer 22, the first material layer 22 including a plurality of recesses 221, and a light-collecting structure 231 disposed in the recesses 221. In one embodiment of the present invention, as Figure 2As shown, the first material layer 22 further includes a flat portion 222, which is adjacent to the recessed portion 221. The "recessed portion 221" refers, for example, to a region of the first material layer 22 adjacent to the light-emitting unit 12 that is recessed in a direction away from the light-emitting unit 12, while the unrecessed region of the surface 22a of the first material layer 22 is the flat portion 222. In this invention, the first material layer 22 has a first refractive index n1, and the light-collecting structure 231 may be composed of a second material layer 23, which (e.g., the light-collecting structure 231) has a second refractive index n2, wherein the first refractive index n1 is less than the second refractive index n2. In one embodiment of this invention, the difference between the first refractive index n1 and the second refractive index n2 may be between 0.3 and 1 (i.e., ...). For example, it can be between 0.3 and 0.9 (i.e. Or between 0.3 and 0.7 (i.e.) However, the present invention is not limited thereto. In one embodiment of the present invention, the first refractive index n1 may be between 1.2 and 1.8 (i.e., The second refractive index n2 can be between 1.5 and 2.1 (i.e., However, the present invention is not limited thereto. In the present invention, the materials of the first material layer 22 and the second material layer 23 may each comprise acrylic, resin, optical adhesive (OCA) or other suitable materials, which are transparent, colorless and / or low-haze materials.

[0088] In one embodiment of the present invention, such as Figure 2 As shown, the display device may further include a third material layer 3 disposed on the light-emitting unit 12, wherein the third material layer 3 has a third refractive index n3, and the third refractive index n3 is less than or equal to the second refractive index n2. In this invention, the third material layer 3 may be a single-layer or multi-layer design. When the third material layer 3 is a multi-layer design, the materials of each layer may be the same or different, and can be adjusted according to the matching with the light-emitting unit 12. In this invention, the material of the third material layer 3 may include acrylic, resin, optical adhesive (OCA) or other suitable materials, which are transparent, colorless and / or low-haze materials.

[0089] In one embodiment of the present invention, such as Figure 2As shown, the display device may further include a substrate 21, with a first material layer 22 disposed between the substrate 21 and the third material layer 3. In this invention, the material of the substrate 21 may include glass, quartz, sapphire, ceramic, plastic, polycarbonate (PC), polyimide (PI), polypropylene (PP), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), other suitable materials, or combinations thereof, but the invention is not limited thereto. In this invention, the substrate 21 and the first material layer 22 are different materials, but this is not a limitation. In one embodiment of the invention, the refractive index of the substrate 21 is approximately the same as the first refractive index n1 and less than the second refractive index n2, thereby reducing light loss due to mismatch and improving light intensity. For example, the refractive index of the substrate 21 may be between 1.2 and 1.8, but this is not a limitation.

[0090] In this invention, although not shown in the figures, the circuit substrate 11 may include wires, electronic components, transistors, other suitable components, and / or combinations thereof, but the invention is not limited thereto. Suitable electronic components include active components, passive components, or combinations thereof, such as capacitors, resistors, inductors, varactor diodes, variable capacitors, filters, diodes, transistors, sensors, microelectromechanical systems (MEMS) components, liquid crystal chips, etc., but the invention is not limited thereto.

[0091] In this invention, the light-emitting unit 12 may be a light-emitting diode (LED). The LED may include, for example, an organic light-emitting diode (OLED), a sub-millimeter LED, a micro LED, or a quantum dot LED (including QLED and QDLED), but the invention is not limited thereto. In one embodiment of the invention, the light-emitting unit 12 is a micro LED.

[0092] In this invention, the circuit substrate 11 and the light-emitting unit 12 can form a panel 1, and the substrate 21, the first material layer 22 and the light-collecting structure 231 can form a lens substrate 2. The third material layer 3 can be disposed between the panel 1 and the lens substrate 2.

[0093] In one embodiment of the present invention, the number of light-collecting structures 231 may be greater than the number of light-emitting units 12. More specifically, as... Figure 1 As shown, a portion of the light-collecting structure 231 is not positioned corresponding to the light-emitting unit 12. In other words, in the top-view direction Z, a portion of the light-collecting structure 231 does not overlap with the light-emitting unit 12. Thus, the light-collecting structure 231 that does not correspond to the light-emitting unit 12 can serve as a repair area. When a neighboring light-emitting unit 12 is damaged or defective, a new light-emitting unit 12 can be positioned in the repair area to replace the defective or damaged light-emitting unit 12, thereby reducing the resulting scrap costs. In one embodiment of the present invention, as... Figure 1 As shown, a pixel unit P may include three light-collecting structures 231 (i.e., a first light-collecting structure 231A, a second light-collecting structure 231B, and a third light-collecting structure 231C) and three light-collecting structures 231 serving as repair areas (i.e., three light-collecting structures 231 that do not correspond to the light-emitting unit 12), but the present invention is not limited thereto. In other embodiments of the present invention, although not shown in the figure, a pixel unit P may also include three light-collecting structures 231 and one or two light-collecting structures 231 serving as repair areas.

[0094] Figure 3 This is a cross-sectional schematic diagram of a partial display device according to an embodiment of the present invention. Figure 3 Display device and Figure 2 Similar, except for the following differences.

[0095] In one embodiment of the present invention, such as Figure 3 As shown, the first material layer 22 includes a flat portion 222 and a plurality of recessed portions 221. The flat portion 222 is adjacent to the recessed portions 221. A portion of the second material layer 23 is disposed in the recessed portions 221 to form a plurality of light-collecting structures 231, and a portion of the second material layer 23 is disposed on the flat portion 222. The second material layer 23 can serve as a planarization layer to facilitate subsequent processing.

[0096] In this embodiment, the light-collecting structure 231 refers, for example, to a portion of the second material layer 23 disposed in the recess 221 of the first material layer 22. The diameter of the light-collecting structure 231 refers, for example, to the maximum dimension of the second material layer 23 disposed in the recess 221 of the first material layer 22 in a cross-sectional view.

[0097] In this invention, other features of the display device may be as described above, and will not be repeated here.

[0098] Figure 4 This is a cross-sectional schematic diagram of a partial display device according to an embodiment of the present invention. Figure 4 Display device and Figure 2 Similar, except for the following differences.

[0099] In one embodiment of the present invention, such as Figure 1 and Figure 4 As shown, the display device may further include a spacer S1, formed on the lens substrate 2 or the circuit substrate 1 and disposed between the circuit substrate 1 and the lens substrate 2. The spacer S1 may be disposed corresponding to the flat portion 222 of the first material layer 22; in other words, as shown... Figure 4 As shown, in the top view Z direction, the spacer S1 overlaps with the flat portion 222 of the first material layer 22. In one embodiment of the present invention, as... Figure 1 and Figure 4 As shown, in the top-view direction Z, the spacer S1 does not overlap with the light-collecting structure 231. The spacer S1 can be used to fix the distance between the panel 1 and the lens substrate 2, thereby improving the reliability of the display device or improving the light-collecting effect of the light-collecting structure 231.

[0100] In this invention, the material of the spacer S1 may include resin, organic materials, other suitable materials, or combinations thereof, but the invention is not limited thereto. In this invention, the cross-sectional shape of the spacer S1 is not particularly limited; for example, it may be a cylinder, rectangular prism, trapezoidal prism, triangular prism, cone, triangular pyramid, or other irregularly shaped prism, but the invention is not limited thereto. In this invention, the shape of the spacer S1 in the top view Z direction is not particularly limited; for example, it may be a circle, rectangle, trapezoid, triangle, or other irregular shape, but the invention is not limited thereto.

[0101] In one embodiment of the present invention, such as Figure 4 As shown, the third material layer 3 is disposed between the panel 1 and the lens substrate 2. The third material layer 3 may be vacuum or filled with air, or may contain acrylic, resin, optical adhesive (OCA) or other suitable materials, which are transparent, colorless and / or low haze materials.

[0102] In one embodiment of the present invention, although not shown in the figure, a portion of the second material layer 23 may be disposed on the flat portion 222 of the first material layer 22, so that the spacer S1 may overlap with a portion of the second material layer 23 in the top view Z direction.

[0103] In this invention, other features of the display device may be as described above, and will not be repeated here.

[0104] Figure 5 This is a cross-sectional schematic diagram of a partial display device according to an embodiment of the present invention. Figure 5 Display device and Figure 2 Similar, except for the following differences.

[0105] In one embodiment of the present invention, such as Figure 5As shown, the display device may further include a spacer S1 and another spacer S2. Spacer S1 is formed, for example, on the lens substrate 2, and the other spacer S2 is formed, for example, on the circuit substrate 11, with spacer S1 and the other spacer S2 disposed between the circuit substrate 11 and the lens substrate 2. Spacer S1 may be disposed corresponding to the other spacer S2; in other words, as shown... Figure 5 As shown, in the top-view direction Z, spacer S1 overlaps with another spacer S2. Spacer S1 and the other spacer S2 can be provided corresponding to the flat portion 222 of the first material layer 22; in other words, as... Figure 5 As shown, in the top view Z, spacer S1 and another spacer S2 overlap with the flat portion 222 of the first material layer 22. In one embodiment of the invention, as... Figure 5 As shown, in the top-view direction Z, spacer S1 and another spacer S2 do not overlap with the light-collecting structure 231. Spacer S1 and another spacer S2 can be used to fix the distance between the panel 1 and the lens substrate 2, thereby improving the reliability of the display device or improving the light-collecting effect of the light-collecting structure 231.

[0106] In this invention, the materials of spacer S1 and the other spacer S2 may each comprise resin, organic materials, other suitable materials, or combinations thereof, but the invention is not limited thereto. In this invention, the cross-sectional shapes of spacer S1 and the other spacer S2 are not particularly limited; for example, they may each be a cylinder, rectangular prism, trapezoidal prism, triangular prism, cone, triangular pyramid, or other irregularly shaped prism, but the invention is not limited thereto. In this invention, the shapes of spacer S1 and the other spacer S2 in the top view Z direction are not particularly limited; for example, they may each be a circle, rectangle, trapezoid, triangle, or other irregular shape, but the invention is not limited thereto.

[0107] In one embodiment of the present invention, such as Figure 5 As shown, the third material layer 3 is disposed between the panel 1 and the lens substrate 2. The third material layer 3 may be vacuum or filled with air, or may contain acrylic, resin, optical adhesive (OCA) or other suitable materials, which are transparent, colorless and / or low haze materials.

[0108] In one embodiment of the present invention, although not shown in the figure, a portion of the second material layer 23 may be disposed on the flat portion 222 of the first material layer 22, so that in the top view Z, the spacer S1 and another spacer S2 may overlap with a portion of the second material layer 23.

[0109] In this invention, other features of the display device may be as described above, and will not be repeated here.

[0110] Figures 6A to 6D This is a schematic diagram illustrating the fabrication of a display device according to an embodiment of the present invention.

[0111] In one embodiment of the present invention, such as Figures 6A to 6C As shown, the manufacturing method of the display device includes: providing a lens substrate 2, wherein the lens substrate 2 includes a substrate 21 and a plurality of light-collecting structures 231, the light-collecting structures 231 being formed on the substrate 21. More specifically, as... Figure 6A and Figure 6B As shown, the step of forming the light-collecting structure 231 on the substrate 21 further includes: forming a first material layer 22 on the substrate 21; patterning the first material layer 22 to form a plurality of recesses 221; and forming a second material layer 23 on the first material layer 22, wherein at least a portion of the second material layer 23 fills the recesses 221 to form the light-collecting structure 231. Next, as... Figure 6C As shown, a spacer S1 is selectively formed on the lens substrate 2 or a panel 1 (e.g., Figure 6D At least one of the materials shown is provided, for example, a spacer S1 is formed on the lens substrate 2, wherein the first material layer 22 includes a flat portion 222 adjacent to the recessed portion 221 and the spacer S1 corresponds to the flat portion 222. In this invention, the method for patterning the first material layer 22 may be, for example, imprint lithography, but the invention is not limited thereto.

[0112] In one embodiment of the present invention, such as Figure 6D As shown, the method of manufacturing the display device further includes: providing a panel 1, wherein the panel 1 includes a circuit substrate 11 and a plurality of light-emitting units 12, the light-emitting units 12 being disposed on the circuit substrate 11; and assembling a lens substrate 2 prepared as described above with the panel 1, such that each light-emitting unit 12 corresponds to one of the light-collecting structures 231, more specifically, for example, ... Figure 6C The lens substrate 2 shown is flipped 180° and... Figure 6D The panel 1 shown is a pair, which can be used to form, for example... Figure 4 The display device shown. However, Figure 4 The display device is not limited to being manufactured only by the methods described above.

[0113] In one embodiment of the present invention, before assembling the lens substrate 2 with the panel 1, the process may further include forming another spacer S2 on the circuit substrate 11. Afterwards, after assembling the lens substrate 2 with the panel 1, for example, [the following steps may be taken]. Figure 5 The display device shown. However, Figure 5 The display device is not limited to being manufactured only by the methods described above.

[0114] In one embodiment of the present invention, the spacer S1 may be selectively not formed on the lens substrate 2, and before the step of assembling the lens substrate 2 with the panel 1, a third material layer 3 is further formed on the panel 1. Afterwards, after assembling the lens substrate 2 with the panel 1, for example, a third material layer 3 may be formed. Figure 2 The display device shown. However, Figure 2 The display device is not limited to being manufactured only by the methods described above.

[0115] In one embodiment of the present invention, when the second material layer 23 is formed on the first material layer 22, a portion of the second material layer 23 fills the recess 221 to form a light-collecting structure 231, and a portion of the second material layer 23 may be selectively disposed on the flat portion 222. Thus, after assembling the lens substrate 2 and the panel 1, for example, a structure can be formed... Figure 3 The display device shown. However, Figure 3 The display device is not limited to being manufactured only by the methods described above.

[0116] In one embodiment of the present invention, by forming the light-emitting unit 12 and the light-collecting structure 231 on different substrates or base materials, and then assembling the two substrates or base materials, the damage to the light-emitting unit 12 caused by the high temperature in the process can be reduced, thereby improving product yield and / or reducing costs.

[0117] Figure 7 This is a top view schematic diagram of a partial display device according to an embodiment of the present invention. Figure 7 Display device and Figure 1 Similar, except for the following differences. For ease of explanation Figure 7 Only some components are shown. In addition, light-emitting units 12 of the same color are represented by the same fill pattern in the figure, and dashed lines indicate that no light-emitting unit 12 is provided at that location.

[0118] In one embodiment of the present invention, such as Figure 7 As shown, in the top-view direction Z, the center of the light-emitting unit 12 and the center of the light-collecting structure 231 may not overlap. More specifically, there is a first distance C1 between the center of the first light-emitting unit 12A and the center of the first light-collecting structure 231A, and a second distance C2 between the center of the second light-emitting unit 12B and the center of the second light-collecting structure 231B. The first distance C1, the second distance C2, and the first diameter D1 of the first light-collecting structure 231A can satisfy the following formula:

[0119]

[0120] Where C1 is the first distance, C2 is the second distance, and D1 is the first diameter, and C1 and C2 are not equal to 0.

[0121] In one embodiment of the present invention, the first distance C1 may be less than or equal to half the difference between the first diameter D1 and the size D4 of the first light-emitting unit 12A, that is, the first distance C1 may be less than or equal to (The difference between the first diameter D1 and the size D4 of the first light-emitting unit 12A) Similarly, the second distance C2 can be less than or equal to half the difference between the second diameter D2 and the size D5 of the second light-emitting unit 12B, that is, the second distance C2 can be less than or equal to (The difference between the second diameter D2 and the size D5 of the second light-emitting unit 12B) In one embodiment of the present invention, the difference between the first distance C1 and the second distance C2 may be less than or equal to 15 μm (i.e., For example, less than or equal to 10 μm (i.e. ), less than or equal to 5μm (i.e. or less than or equal to 3μm (i.e. However, the present invention is not limited thereto. In one embodiment of the present invention, the first distance C1 and the second distance C2 may each be between 3 μm and 25 μm (i.e., , For example, those between 3μm and 20μm (i.e. , Or between 5μm and 15μm (i.e.) , However, the present invention is not limited thereto. In one embodiment of the present invention, the first distance C1 and the second distance C2 can be viewed as vectors, and the first diameter D1 is a scalar. Therefore, the light emission angle of the display device can be adjusted by controlling the first distance C1 and / or the second distance C2. When the first distance C1, the second distance C2 and the first diameter D1 conform to the above formula, the color shift of the display device can be reduced.

[0122] Similarly, in the top-view direction Z, there is a third distance C3 between the center of the third light-emitting unit 12C and the center of the third light-collecting structure 231C, wherein the first distance C1, the third distance C3, and the first diameter D1 of the first light-collecting structure 231A can satisfy the following formula:

[0123]

[0124] Where C1 is the first distance, C3 is the third distance, and D1 is the first diameter, and C1 and C3 are not equal to 0.

[0125] In one embodiment of the present invention, the third distance C3 may be less than or equal to half the difference between the third diameter D3 and the size D6 of the third light-emitting unit 12C, that is, the third distance C3 may be less than or equal to (The difference between the third diameter D3 and the size D6 of the third light-emitting unit 12C) The difference between the first distance C1 and the third distance C3 can be less than or equal to 15 μm (i.e., For example, less than or equal to 10 μm (i.e. ), less than or equal to 5μm (i.e. or less than or equal to 3μm (i.e. However, the present invention is not limited thereto. In one embodiment of the present invention, the third distance C3 may be between 3 μm and 25 μm (i.e., For example, those between 3μm and 20μm (i.e. Or between 5μm and 15μm (i.e.) However, the present invention is not limited thereto. In one embodiment of the present invention, the first distance C1 and the third distance C3 can be viewed as vectors, and the first diameter D1 is a scalar. Therefore, the light emission angle of the display device can be adjusted by controlling the first distance C1 and / or the third distance C3. When the first distance C1, the third distance C3 and the first diameter D1 conform to the above formula, the color shift of the display device can be reduced.

[0126] In one embodiment of the present invention, such as Figure 7 As shown, the centers of the first light-emitting unit 12A and the second light-emitting unit 12B are offset from the centers of the first light-collecting structure 231A and the second light-collecting structure 231B in approximately the same direction, but the present invention is not limited thereto. In one embodiment of the present invention, as... Figure 7 As shown, the first distance C1 extends along a first extension direction ED1, and the second distance C2 extends along a second extension direction ED2, wherein the angle θ between the first extension direction ED1 and the second extension direction ED2 can be between 0° and 20° (i.e., ...). For example, between 0 and 10 (i.e.) However, the present invention is not limited thereto. In one embodiment of the present invention, such as Figure 7 As shown, the first extension direction ED1 can be approximately parallel to the second extension direction ED2, that is, the angle θ between the first extension direction ED1 and the second extension direction ED2 can be 0°, but the present invention is not limited thereto. In one embodiment of the present invention, the first visible distance C1, the second distance C2, and the first diameter D1 are all scalars. Therefore, by controlling the first distance C1 and the first extension direction ED1 and / or the second distance C2 and the second extension direction ED2, the light emission angle of the display device can be adjusted. When the angle θ between the first extension direction ED1 and the second extension direction ED2 meets the above-mentioned limitation, and the first distance C1, the second distance C2, and the first diameter D1 meet the above-mentioned formula, the occurrence of color shift in the display device can be reduced.

[0127] Similarly, such as Figure 7 As shown, the center of the first light-emitting unit 12A and the center of the third light-emitting unit 12C are offset from the center of the first light-collecting structure 231A and the center of the third light-collecting structure 231C in approximately the same direction, but the present invention is not limited thereto. Figure 7As shown, the third distance C3 extends along a third extension direction ED3, wherein the angle θ between the first extension direction ED1 and the third extension direction ED3 can be between 0° and 20° (i.e., ...). For example, between 0 and 10 (i.e.) However, the present invention is not limited thereto. In one embodiment of the present invention, such as Figure 7 As shown, the first extension direction ED1 can be approximately parallel to the third extension direction ED3, that is, the angle θ between the first extension direction ED1 and the third extension direction ED3 can be 0°, but the present invention is not limited thereto. In one embodiment of the present invention, the visible first distance C1, the third distance C3, and the first diameter D1 are all scalars. Therefore, by controlling the first distance C1 and the first extension direction ED1 and / or the third distance C3 and the third extension direction ED3, the light emission angle of the display device can be adjusted. When the angle θ between the first extension direction ED1 and the third extension direction ED3 meets the above-mentioned limitation, and the first distance C1, the third distance C3, and the first diameter D1 meet the above-mentioned formula, the occurrence of color shift in the display device can be reduced.

[0128] Figure 8 This is a light emission pattern diagram of a display device according to an embodiment of the present invention.

[0129] In one embodiment of the present invention, when the angle θ between the first extending direction ED1 and the second extending direction ED2 is between 0° and 20°, and the first distance C1, the second distance C2, and the first diameter D1 of the first light-collecting structure 231A satisfy the above formula, the light emission result of the display device can be as follows: Figure 8 As shown, the results indicate that the light emission angle θ1 of the display device can be between 0° and 45° (i.e., And the light emission angle θ1 is between 0° and 30° (i.e. When the light intensity is high, the "light emission angle θ1" refers to, for example, the angle between the normal of the display device and the direction of the strongest light emission.

[0130] Figure 9 This is a schematic diagram of a display device according to an embodiment of the present invention applied to an automotive display.

[0131] In one embodiment of the present invention, when the display device of the present invention is applied to an automotive display, such as... Figure 9 As shown, the light emission angle θ1 of the display device 100 can be adjusted by controlling the first distance C1 and the first extension direction ED1 and / or the second distance C2 and the second extension direction ED2, so that when the image of the display device 100 is projected onto the windshield G, it is parallel to the line of sight of the human eye E. More specifically, when the angle θ1 between the normal N of the display device 100 and the direction L of the strongest light emission is between 0° and 45° (i.e., When the image from the display device 100 is projected onto the windshield G, it is parallel to the line of sight of the human eye E and has a preferred light intensity. In this invention, Figure 9 The orientation of the display device 100 relative to the human eye E is only for illustrative purposes. That is, the orientation of the display device 100 can, for example, form an obtuse angle with the line of sight of the human eye E. In this case, viewed from one side, as shown... Figure 9 As shown, the display device 100 is positioned from the upper left to the lower right. However, the present invention is not limited to this. In other forms of the present invention, the display device 100 may be positioned parallel to the line of sight of the human eye E, so that when viewed from the side, the display device 100 may be positioned in parallel. Alternatively, the display device 100 may be positioned at an acute angle to the line of sight of the human eye E, so that when viewed from the side, the display device 100 may be positioned from the lower left to the upper right.

[0132] Figure 10 This is a top view schematic diagram of a partial display device according to an embodiment of the present invention. Figure 10 Display device and Figure 1 Similar, except for the following differences. Furthermore, for ease of explanation... Figure 10 Only some of the components are shown.

[0133] In one embodiment of the present invention, such as Figure 10 As shown, the display device may also include a light angle controller 4, disposed on the lens substrate 2 (e.g., Figure 2 As shown), the lens substrate 2 is located on the panel 1 (as shown). Figure 2 (As shown) and the light angle controller 4. In this invention, the light angle controller 4 includes, for example, multiple lenticular lens structures. The light angle controller 4 can be used to adjust the light emission angle of the light-emitting unit 12, enabling the display device to be used for stereoscopic image display. In one embodiment of this invention, the cross-sectional shape of the lenticular lens is semi-circular, but not limited thereto. In this invention, as... Figure 10 As shown, the solid line represents the size of the cylindrical lens structure in the optical angle controller 4, and the dot-dashed line represents the line connecting the tops of the protrusions in the cylindrical lens structure. The size of the cylindrical lens structure is not particularly limited and can be adjusted as needed.

[0134] In one embodiment of the present invention, such as Figure 10 As shown, the circuit substrate 11 has a first edge 11e1 and a second edge 11e2 that are interconnected. The first edge 11e1 extends along a first direction X, and the second edge 11e2 extends along a second direction Y, wherein the first direction X is different from the second direction Y, for example, the first direction X is perpendicular to the second direction Y. Figure 10As shown, the extension direction ED4 of the cylindrical lens structure in the light angle controller 4 is not parallel to the first direction X and the second direction Y. In this way, the effect of the light angle controller 4 in displaying stereoscopic images can be improved.

[0135] In one embodiment of the present invention, such as Figure 10 As shown, in the top-view direction Z, each cylindrical lens structure in the light angle controller 4 can overlap with at least four pixels P. More specifically, in the first direction X, one cylindrical lens structure can overlap with at least two pixels P, and in the second direction Y, the cylindrical lens structure can overlap with at least two pixels P. This improves the stereoscopic image display effect of the light angle controller 4.

[0136] Figure 10 The light angle controller 4 in the example uses a structure with three cylindrical lenses. However, in other embodiments of the invention, the light angle controller 4 of the display device may include at least two cylindrical lens structures, such as four, five, or more, but the invention is not limited thereto. Furthermore, Figure 10 China is Figure 1 Taking the light-emitting unit 12 and the light-collecting structure 231 as an example, the center of the light-emitting unit 12 and the center of the light-collecting structure 231 approximately overlap. However, in other embodiments of the present invention, the light-emitting unit 12 and the light-collecting structure 231 may also be as follows: Figure 7 As shown, there can be a distance between the center of the light-emitting unit 12 and the center of the light-collecting structure 231.

[0137] In this invention, by designing the light-collecting structure 231 to correspond to the light-emitting unit 12 and ensuring that the specifications of the light-collecting structure 231 and the light-emitting unit 12 meet specific limitations, the light emission angle of the display device can be controlled or the brightness of the display device can be improved. Furthermore, when manufacturing a display device using the method of this invention, damage to the light-emitting unit 12 caused by high temperatures during the manufacturing process can be reduced, thereby improving product yield and / or reducing costs.

[0138] The specific embodiments described above should be interpreted as merely illustrative and not as limiting the remainder of the invention in any way.

Claims

1. A display device, characterized in that, Include: Circuit substrate; Multiple light-emitting units are disposed on the circuit substrate, wherein the light-emitting units include a first light-emitting unit and a second light-emitting unit; and Multiple light-collecting structures, including a first light-collecting structure and a second light-collecting structure, wherein the first light-collecting structure corresponds to the first light-emitting unit and the second light-collecting structure corresponds to the second light-emitting unit; In a top-view orientation, there is a first distance between the center of the first light-emitting unit and the center of the first light-collecting structure, and a second distance between the center of the second light-emitting unit and the center of the second light-collecting structure. The first light-collecting structure has a first diameter, and the first distance, the second distance, and the first diameter satisfy the following formula: Where C1 is the first distance, C2 is the second distance, and D1 is the first diameter, and C1 and C2 are not equal to 0.

2. The display device according to claim 1, characterized in that, The first distance is less than or equal to half the difference between the first diameter and the size of the first light-emitting unit.

3. The display device according to claim 1, characterized in that, The second light-collecting structure has a second diameter, and the second distance is less than or equal to half the difference between the second diameter and the size of the second light-emitting unit.

4. The display device according to claim 1, characterized in that, The first distance extends along a first extending direction, and the second distance extends along a second extending direction, wherein the angle between the first extending direction and the second extending direction is within a certain range. to between.

5. The display device according to claim 1, characterized in that, It also includes a first material layer, which contains a plurality of recesses, in which light-collecting structures are disposed.

6. The display device according to claim 5, characterized in that, The first material layer has a first refractive index, and the light-collecting structures have a second refractive index, wherein the first refractive index is less than the second refractive index.

7. The display device according to claim 6, characterized in that, The difference between the first refractive index and the second refractive index is between 0.3 and 1.

8. The display device according to claim 6, characterized in that, It also includes a third material layer disposed on the light-emitting units, wherein the third material layer has a third refractive index, and the third refractive index is less than or equal to the second refractive index.

9. The display device according to claim 1, characterized in that, The number of light-collecting structures is greater than the number of light-emitting units.

10. A method for manufacturing a display device, characterized in that, Includes the following steps: A lens substrate is provided, wherein the lens substrate includes a substrate and a plurality of light-collecting structures formed on the substrate; A panel is provided, wherein the panel includes a circuit substrate and a plurality of light-emitting units disposed on the circuit substrate; and The lens substrate is paired with the panel so that each of the light-emitting units corresponds to one of the light-collecting structures.

11. The manufacturing method according to claim 10, characterized in that, The step of forming these light-collecting structures on the substrate further includes: A first material layer is formed on the substrate; Pattern the first material layer to form a plurality of recesses; and A second material layer is formed on the first material layer, wherein at least a portion of the second material layer fills the recesses to form the light-collecting structures.

12. The manufacturing method according to claim 11, characterized in that, The first material layer includes a flat portion adjacent to the recessed portions, and a portion of the second material layer is disposed on the flat portion.

13. The manufacturing method according to claim 11, characterized in that, Prior to assembling the lens substrate with the panel, the process further includes forming a spacer on at least one of the lens substrate and the panel, wherein the first material layer includes a flat portion adjacent to the recessed portions, and the spacer corresponds to the flat portion.

14. The manufacturing method according to claim 10, characterized in that, The number of light-collecting structures is greater than the number of light-emitting units.

15. The manufacturing method according to claim 10, characterized in that, The light-emitting units include a first light-emitting unit and a second light-emitting unit, and the light-collecting structures include a first light-collecting structure and a second light-collecting structure. The first light-collecting structure corresponds to the first light-emitting unit, and the second light-collecting structure corresponds to the second light-emitting unit. In a top-view direction, there is a first distance between the center of the first light-emitting unit and the center of the first light-collecting structure, and a second distance between the center of the second light-emitting unit and the center of the second light-collecting structure. The first light-collecting structure has a first diameter. The first distance, the second distance, and the first diameter satisfy the following formula: Where C1 is the first distance, C2 is the second distance, and D1 is the first diameter, and C1 and C2 are not equal to 0.

Images