Display device

Abstract

A display device includes a display area and a peripheral area. The display device includes a display panel, a back panel, and a sensor. The display panel includes a first polarizing plate and a second polarizing plate. The first polarizing plate is disposed in the display area. The second polarizing plate is disposed in the display area. The back panel overlaps the display panel. The sensor is disposed on the back panel and overlaps the first polarizing plate and the second polarizing plate in the display area.

Description

Technical Field

[0001] The present invention relates to an electronic device, and in particular to a display device. Prior Art

[0002] Current display devices primarily place sensors (such as digital camera systems) in the peripheral area for image sensing. However, the size limitation of the sensors makes it difficult to design a narrow bezel for the display device. Summary of the Invention

[0003] The present disclosure provides a display device that helps improve the feasibility of narrow frame design.

[0004] In one embodiment of the present disclosure, a display device has a display area and a peripheral area. The display device includes a display panel, a backplane, and a sensor. The display panel includes a first polarizer and a second polarizer. The first polarizer is disposed in the display area. The second polarizer is disposed in the display area. The backplane overlaps the display panel. The sensor is disposed on the backplane and overlaps the first and second polarizers in the display area.

[0005] To make the above features and advantages of the present disclosure more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. Simple diagram description

[0006] FIG1 is a schematic top view of a display device according to some embodiments of the present disclosure. FIG. 2 is a schematic cross-sectional view corresponding to the section line II′ in FIG. 1 . FIG. 3 is a graph showing the relationship between wavelength and transmittance of a display panel according to some embodiments of the present disclosure. FIG. 4 is a schematic top view of a display device according to some embodiments of the present disclosure. FIG. 5 is a schematic cross-sectional view corresponding to the section line II-II′ in FIG. 4 . FIG6 is a simplified cross-sectional diagram of a display device according to some embodiments of the present disclosure. FIG. 7 is a partial cross-sectional schematic diagram of a display device according to some embodiments of the present disclosure. FIG. 8 is an exploded schematic diagram of a display device according to some embodiments of the present disclosure. 9 and 10 are schematic top views of light panels in two display devices according to some embodiments of the present disclosure. Implementation Method

[0007] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, like reference numerals are used in the drawings and the description to refer to the same or like parts.

[0008] Throughout this disclosure and the accompanying claims, certain terms are used to refer to specific components. Those skilled in the art will understand that electronic device manufacturers may refer to the same components by different names. This document does not intend to distinguish between components that have the same function but different names. In the following description and claims, the words "including" and "comprising" are open-ended and should be interpreted as meaning "including, but not limited to..."

[0009] Directional terms used herein, such as "up," "down," "front," "back," "left," and "right," refer only to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes only and are not intended to limit the present disclosure. In the accompanying drawings, each diagram depicts the general characteristics of methods, structures, and / or materials used in specific embodiments. However, these diagrams should not be construed as defining or limiting the scope or nature of the embodiments. For example, the relative sizes, thicknesses, and positions of various layers, regions, and / or structures may be exaggerated or reduced for clarity.

[0010] In this disclosure, when a structure (or layer, component, or substrate) is located on / above another structure (or layer, component, or substrate), this may mean that the two structures are adjacent and directly connected, or that they are adjacent but not directly connected. Indirect connection means that at least one intervening structure (or intervening layer, intervening component, intervening substrate, or intervening spacer) exists between the two structures, with the bottom surface of one structure adjacent to or directly connected to the top surface of the intervening structure, and the top surface of the other structure adjacent to or directly connected to the bottom surface of the intervening structure. Intervening structures can be single-layer or multi-layer physical or non-physical structures, without limitation. In this disclosure, when a structure is "located on" another structure, this may mean that the structure is "directly" on the other structure, or that the structure is "indirectly" on the other structure, meaning that at least one structure is interposed between the two structures.

[0011] The terms "approximately," "substantially," or "approximately" are generally interpreted as within 10% of a given value or range, or within 5%, 3%, 2%, 1%, or 0.5% of a given value or range. In addition, the phrases "a range from a first value to a second value" or "a range between a first value and a second value" indicate that the range includes the first value, the second value, and other values ​​therebetween.

[0012] The use of ordinal numbers such as "first" and "second" in the specification and claims to modify an element does not, by itself, imply or indicate any prior ordinal number of the element(s), nor does it indicate the order of one element relative to another, or the order of manufacturing methods. Such ordinal numbers are used solely to clearly distinguish a named element from another element with the same name. The claims and the specification may not use the same terminology; thus, the first element in the specification may be the second element in the claims.

[0013] The electrical connection or coupling described in this disclosure may refer to direct connection or indirect connection. In the case of direct connection, the endpoints of two circuit components are directly connected or connected to each other by a conductor segment. In the case of indirect connection, the endpoints of the two circuit components are connected by a switch, diode, capacitor, inductor, resistor, other suitable components, or a combination of the above components, but are not limited to these.

[0014] In the present disclosure, thickness, length, and width can be measured using an optical microscope (OM), while thickness or width can be measured using cross-sectional images obtained using an electron microscope, but this is not limited to these measurements. Furthermore, any two numerical values ​​or directions used for comparison may have a certain degree of error. Furthermore, the phrases "a given range is from a first numerical value to a second numerical value," "a given range falls within the range from a first numerical value to a second numerical value," or "a given range is between a first numerical value and a second numerical value" indicate that the given range includes the first numerical value, the second numerical value, and any other numerical values ​​therebetween. 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.

[0015] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meanings as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the relevant art and this disclosure, and should not be interpreted in an idealized or overly formal manner unless specifically defined in the present disclosure.

[0016] In the present disclosure, an electronic device may include, but is not limited to, a display device, a backlight device, an antenna device, a packaging device, a sensing device, or a splicing device. The electronic device may be a bendable or flexible electronic device. The display device may be a non-luminous display device or a luminous display device. The display device may, for example, include liquid crystal, a light-emitting diode, fluorescence, phosphor, quantum dots (QD), other suitable display media, or a combination thereof. The antenna device may, for example, include a reconfigurable intelligent surface (RIS), a frequency selective surface (FSS), an RF filter, a polarizer, a resonator, or an antenna. The antenna may be a liquid crystal antenna or a varactor diode antenna. The sensing device may be a sensing device that senses capacitance, light, heat, or ultrasound, but is not limited thereto. In the present disclosure, an electronic device may include electronic components, which may include passive components and active components, such as capacitors, resistors, inductors, diodes, transistors, etc. A diode may include a light-emitting diode, a varactor diode, or a photodiode. A light-emitting diode may include, for example, an organic light-emitting diode (OLED), a sub-millimeter light-emitting diode (mini LED), a micro LED, or a quantum dot LED, but is not limited thereto. A splicing device may be, for example, a display splicing device or an antenna splicing device, but is not limited thereto. It should be noted that the electronic device may be any combination of the aforementioned, but is not limited thereto. The packaging device may be a packaging device suitable for wafer-level packaging (WLP) technology or panel-level packaging (WLP) technology, such as a chip-first process or a wafer-last-load (RDL) process. Furthermore, the electronic device may have a rectangular, circular, polygonal shape, a curved edge shape, or other suitable shape. The electronic device may include peripheral systems such as a drive system, a control system, and a light source system to support a display device, an antenna device, a wearable device (e.g., including augmented reality or virtual reality), an in-vehicle device (e.g., including a car windshield), or a splicing device.

[0017] FIG1 is a schematic top view of a display device according to some embodiments of the present disclosure. FIG2 is a schematic cross-sectional view corresponding to the section line I-I' in FIG1. ​​FIG3 is a wavelength-transmittance relationship diagram of a display panel according to some embodiments of the present disclosure. FIG4 is a schematic top view of a display device according to some embodiments of the present disclosure. FIG5 is a schematic cross-sectional view corresponding to the section line II-II' in FIG4. FIG6 is a simplified schematic cross-sectional view of a display device according to some embodiments of the present disclosure. FIG7 is a schematic partial cross-sectional view of a display device according to some embodiments of the present disclosure. FIG8 is an exploded schematic view of a display device according to some embodiments of the present disclosure. FIG9 and FIG10 are schematic top views of light panels in two display devices according to some embodiments of the present disclosure, respectively. FIG9 and FIG10 omit the display panel to clearly illustrate the relative arrangement relationship between the multiple light-emitting units and the sensor.

[0018] It should be noted that the following embodiments may be implemented by replacing, recombining, or combining features from various embodiments to create other embodiments without departing from the spirit of the present disclosure. Features from various embodiments may be mixed and matched as needed, as long as they do not violate the spirit of the invention or conflict with it.

[0019] Referring to Figures 1 and 2 , a display device 1 may have a display area R1 and a peripheral area R2. The display device 1 may include a display panel 10, a backplane 11, and a sensor 12. The display panel 10 includes a first polarizer P1 and a second polarizer P2. The first polarizer P1 is disposed in the display area R1. The second polarizer P2 is disposed in the display area R1. The backplane 11 overlaps the display panel 10. The sensor 12 is disposed on the backplane 11 and overlaps the first polarizer P1 and the second polarizer P2 in the display area R1.

[0020] Specifically, the display region R1 can be used to display visual information, such as text or images. The peripheral region R2 (e.g., the grid area in FIG1 ) is located on at least one side of the display region R1 and can be used to house peripheral circuits (not shown), circuit boards (not shown), flexible circuit boards (not shown), driver components (not shown), other components (not shown), or combinations thereof. In some embodiments, the peripheral region R2 may be adjacent to at least one edge of the display region R1. For example, as shown in FIG1 , the peripheral region R2 may be adjacent to and surround all four edges of the display region R1, but this is not limited to the embodiment. Alternatively, the display device 1 may not have the peripheral region R2, and the aforementioned peripheral circuits, circuit boards, flexible circuit boards, driver components, etc. may overlap the display region R1 in the thickness direction of the display device (e.g., direction D3), for example, on the side of the backplate 11 away from the display panel 10, but this is not limited to the embodiment.

[0021] In some embodiments, as shown in FIG1 or FIG2 , in addition to the display panel 10, the back panel 11, and the sensor 12, the display device 1 may further include a cover plate 13, a bonding layer 14, and a decorative layer 15. The cover plate 13 may be disposed above the display panel 10 via the bonding layer 14 and may be used to protect the components or film layers located thereunder. The cover plate 13 may be a rigid substrate or a flexible substrate. Materials for the cover plate 13 include, but are not limited to, glass, quartz, ceramic, sapphire, plastic, or combinations thereof. Plastics may include, but are not limited to, polycarbonate (PC), polyimide (PI), polypropylene (PP), polyethylene terephthalate (PET), other suitable flexible materials, or combinations thereof. The bonding layer 14 may include, but is not limited to, a light-transmitting adhesive layer such as, but is not limited to, an optically clear adhesive (OCA) or an optically clear resin (OCR).

[0022] The decorative layer 15 is disposed on the surface of the cover plate 13 facing the display panel 10 and is located within the peripheral region R2 to shield components of the display device 1 that are not intended to be visible to the user (such as the aforementioned peripheral circuits, circuit boards, flexible circuit boards, driver components, etc.). The decorative layer 15 may be made of, but is not limited to, an opaque organic polymer material, such as a gray or black organic polymer material (e.g., a black matrix). The decorative layer 15 may have an opening A that exposes the display region R1, allowing the user to see the image information displayed in the display region R1.

[0023] The display panel 10 can be used to provide image information. The display panel 10 can be a non-luminous display panel or a self-luminous display panel. A non-luminous display panel can be, for example, a liquid crystal display panel, but is not limited thereto. A self-luminous display panel can be, for example, a light-emitting diode (LED) display panel, but is not limited thereto. Examples of LEDs include, but are not limited to, organic light-emitting diodes, sub-millimeter light-emitting diodes, micro-LEDs, or quantum dot light-emitting diodes.

[0024] Taking a liquid crystal display panel as an example, as shown in FIG2 , in addition to a first polarizer P1 and a second polarizer P2 , the display panel 10 may further include a first substrate SUB1 , a second substrate SUB2 , a liquid crystal layer LC, barrier walls S, and a dimming layer CF.

[0025] The first substrate SUB1 is adjacent to the first polarizer P1. For example, the first polarizer P1 can be attached to the surface of the first substrate SUB1 facing the backplane 11. The first substrate SUB1 can be a rigid substrate or a flexible substrate. The material of the first substrate SUB1 includes, but is not limited to, glass, quartz, ceramic, sapphire, or plastic. The plastic can include, but is not limited to, polycarbonate (PC), polyimide (PI), polypropylene (PP), polyethylene terephthalate (PET), other suitable flexible materials, or combinations thereof.

[0026] The second substrate SUB2 is disposed corresponding to the first substrate SUB1 and adjacent to the second polarizer P2. For example, the second substrate SUB2 at least partially overlaps the first substrate SUB1 in direction D3, and the second polarizer P2 can be attached to the surface of the second substrate SUB2 facing the cover plate 13. The second substrate SUB2 can also be a rigid substrate or a flexible substrate. The material of the second substrate SUB2 can be similar to that of the first substrate SUB1 and will not be repeated here.

[0027] The liquid crystal layer LC is disposed between the first substrate SUB1 and the second substrate SUB2. The type of the liquid crystal layer LC is not limited. For example, the liquid crystal layer LC may include twisted nematic liquid crystal, vertical alignment liquid crystal, or in-plane switching liquid crystal, but is not limited thereto.

[0028] A retaining wall S is disposed between the first substrate SUB1 and the second substrate SUB2 and is used to define a first region R11 of the display area R1 and a second region R12 adjacent to the first region R11. The first region R11 corresponds to the sensor 12. As shown in Figures 1 and 2, the first region R11 may at least overlap the sensor 12 in a direction D3. In some embodiments, as shown in Figure 1, the retaining wall S may be a closed shape when viewed from above, wherein the area within the retaining wall S is the first region R11, and the area outside the retaining wall S is the second region R12. The closed shape may be rectangular, circular, or other polygonal, and is not limited here. In some embodiments, the retaining wall S (also known as a spacer) may be formed of an opaque material to reduce light interference between the first region R11 and the second region R12. Alternatively, the barrier wall S can be formed of a light-transmitting material, and a light-shielding material (not shown, such as a light-absorbing or light-reflecting material) can be formed on the sidewalls of the barrier wall S to reduce light interference between the first region R11 and the second region R12 and / or improve light utilization efficiency. In some embodiments, as shown in FIG2 , the first region R11 within the barrier wall S can be filled with a liquid crystal layer LC to reduce the impact of light refraction on the sensor 12 receiving light signals, reduce the visual difference between the first region R11 and the second region R12, or reduce the visibility of the first region R11.

[0029] The dimming layer CF is disposed between the liquid crystal layer LC and the second substrate SUB2 and has a first opening area A1. The first opening area A1 may correspond to the first region R11. The dimming layer CF may include a color filter layer, a color conversion layer, or a combination thereof. The dimming layer CF may be disposed on the surface of the second substrate SUB2 facing the liquid crystal layer LC. The first opening area A1 of the dimming layer CF is a hollowed-out area of ​​the dimming layer CF, for example, an area without a color filter pattern. By aligning the first opening area A1 with the first region R11, interference from the dimming layer CF on the first region R11 (e.g., light absorption, refraction, and / or reflection) can be reduced, thereby improving the clarity or accuracy of image sensing. In some embodiments, the dimming layer CF may be disposed corresponding to the first region R11 and the second region R2 to facilitate manufacturing and / or assembly.

[0030] Depending on different needs, the display panel 10 may further include one or more components or layers. For example, although not shown in Figures 1 or 2, the display panel 10 may further include multiple switching components and multiple electrodes. The multiple switching components and multiple electrodes may be sequentially disposed on the first substrate SUB1, with the multiple electrodes electrically connected to the multiple switching components. By varying the voltage applied to the multiple electrodes, the tilting direction of multiple liquid crystal molecules (not shown) in the liquid crystal layer LC can be controlled, thereby controlling the transmittance of the display panel 10. In some embodiments, multiple switching components or other components that may affect light transmission (e.g., the aforementioned dimming layer CF or the unillustrated black matrix) can be disposed outside the first region R11 to reduce interference (e.g., light absorption, refraction, and / or reflection) caused by these components on the first region R11, thereby improving the clarity or accuracy of image sensing. Alternatively, the switching elements and / or dimming layer CF in the first region R11 may not be removed (for example, the first region R11 and the second region R12 of the display panel 10 may have the same configuration) and / or the formation of the retaining wall S may be omitted to improve the convenience of the process and / or assembly.

[0031] In a non-self-luminous display panel architecture, the display device 1 may further include a light board 16 and multiple light-emitting units 17 (Figures 1 and 2 schematically illustrate only one light-emitting unit 17). The light board 16 is disposed on the back panel 11 and has a first through hole TH1 that overlaps the sensor 12. The multiple light-emitting units 17 are disposed on the light board 16. In some embodiments, as shown in Figure 1 or 2, at least one of the multiple light-emitting units 17 (such as the second light-emitting unit 17b) may be disposed adjacent to the sensor 12, and the at least one light-emitting unit 17 (such as the second light-emitting unit 17b) may also be disposed corresponding to the first region R11 of the retaining wall S. In a top view, as shown in Figure 1, the retaining wall S may surround the sensor 12 and the second light-emitting unit 17b. The wavelength of light emitted by the second light-emitting unit 17b may correspond to the absorption wavelength of the sensor 12. For example, the sensor 12 may be a non-visible light sensor (such as an infrared sensor), and the second light-emitting unit 17b may include a non-visible light emitting element (such as an infrared light-emitting diode), but the present invention is not limited thereto.

[0032] In some embodiments, at least one optical film (such as the at least one optical film 18 shown in FIG. 7 ) may be disposed between the display panel 10 and the light board 16. The at least one optical film 18 may have a second through hole TH2, wherein the second through hole TH2 corresponds to the first region R11 and overlaps at least one of the sensor 12 and the second light-emitting unit 17b. For example, the second through hole TH2 may overlap the sensor 12 (as shown in FIG. 7 ), overlap the second light-emitting unit 17b, or overlap both the sensor 12 and the second light-emitting unit 17b, but the present invention is not limited thereto. In some embodiments, the at least one optical film 18 may also have a third through hole (not shown) adjacent to the second through hole, wherein the third through hole corresponds to or overlaps the second light-emitting unit 17b, but the present invention is not limited thereto.

[0033] The back plate 11 may be a circuit board or a printed circuit board, and may be electrically connected to the sensor 12. In some embodiments, although not shown, a gap, an adhesive layer (e.g., foam), a buffer layer, and / or a snap-fit ​​structure may be provided between the back plate 11 and the light board 16.

[0034] The sensor 12 can be a light sensor, such as an infrared sensor, but is not limited thereto. Depending on different needs, the number of sensors 12 can be one or more, the number of second light-emitting units 17b can be one or more, and the number of retaining walls S can be one or more. Multiple retaining walls S can be provided to correspond to multiple sensors 12. For example, in a top view, the retaining walls S can surround one or more sensors 12, one or more second light-emitting units 17b, or one or more sensors 12 and one or more second light-emitting units 17b. In Figure 1, the second light-emitting units 17b and the sensor 12 are arranged along direction D1, and the retaining walls S surround one second light-emitting unit 17b and one sensor 12. However, it should be understood that the number of second light-emitting units 17b, the sensor 12, and the retaining walls S, as well as their relative arrangement and / or number, can be varied according to needs and are not limited to what is shown in Figure 1. For example, the second light-emitting unit 17b and the sensor 12 can be arranged along direction D2, but this is not a limitation. Both the direction D1 and the direction D2 are perpendicular to the direction D3, and the direction D1 and the direction D2 intersect with each other, for example, are perpendicular to each other, but not limited thereto.

[0035] In some embodiments, the arrangement of the first polarizer P1, liquid crystal layer LC, and second polarizer P2 can ensure that the transmittance of first region R11 for visible light (e.g., light with a wavelength between 380 nm and 750 nm) is close to zero, while the transmittance for light emitted by second light-emitting unit 17b (e.g., non-visible light) is greater than or equal to 60% (see FIG3 ). This allows non-visible light emitted by second light-emitting unit 17b to pass through first region R11 and reach an object, while also allowing non-visible light reflected by the object to pass through first region R11 and reach sensor 12. The corresponding relationship between the transmission axis of first polarizer P1 and that of second polarizer P2, combined with the different liquid crystal layer inactive or active conditions, is described below. When measuring the transmittance of display panel 10, the light source and sensor are positioned on opposite sides of the display panel. If the light intensity output by the light source is a and the light intensity received by the sensor is b, the transmittance of display panel 10 is equal to (b / a)*100%.

[0036] In FIG3 , for light with a wavelength of approximately 880 nm to approximately 1598 nm, the transmittance of the display panel 10 is, for example, greater than or equal to 60%, and for light with a wavelength of approximately 940 nm, the transmittance of the display panel 10 is, for example, greater than or equal to 70%. In this architecture, the sensor 12 can be a sensor that receives light with a wavelength between approximately 880 nm and approximately 1598 nm, for example, a sensor that receives light with a wavelength of approximately 940 nm, but this is not limited to such a sensor.

[0037] Referring again to Figures 1 and 2, polarizers (such as the first polarizer P1 and the second polarizer P2) generally refer to structures that transmit light of a specific polarization direction and absorb or reflect light of other polarization directions. For example, the polarizer material may include organic materials, inorganic materials, or a combination thereof. In some embodiments, the transmission axis (not shown) of the first polarizer P1 may be perpendicular to the transmission axis (not shown) of the second polarizer P2. In this configuration, the liquid crystal layer LC may utilize, for example, vertically aligned liquid crystals (VALC) or transverse electric field effect liquid crystals (TEELC). Thus, when the liquid crystal layer LC in the first region R11 is inactive (i.e., when no voltage is applied to one or more electrodes in the first region R11), the first region R11 presents a black image due to its near-zero transmittance for visible light. This allows the sensor 12 to be hidden or its visibility to be reduced, while still allowing the sensor 12 to receive image light signals. In other embodiments, the transmission axis (not shown) of the first polarizer P1 may be parallel to the transmission axis (not shown) of the second polarizer P2. In this architecture, the liquid crystal layer LC can utilize twisted nematic liquid crystals. Thus, when the liquid crystal layer LC in the first region R11 is inactive (i.e., when no voltage is applied to one or more electrodes in the first region R11), the first region R11 presents a black image due to its near-zero transmittance to visible light. This can conceal the sensor 12 or reduce its visibility, while still allowing the sensor 12 to receive image light signals.

[0038] When the liquid crystal layer LC in the second region R12 is inactive, the first and second regions R11 and R12 both display a black screen, giving them a consistent appearance. This makes the area where the sensor 12 is located (i.e., the first region R11) imperceptible to the human eye. In some embodiments, the first region R11 can correspond to the non-displaying area of ​​the second region R12 (e.g., the area where the dynamic island is located during video playback). This way, when the liquid crystal layer LC in the second region R12 is active (i.e., when the second region R12 is displaying an image), the area where the sensor 12 is located is also imperceptible to the human eye. Whether the display panel 10 is powered on (e.g., the liquid crystal layer LC in both the first and second regions R11 and R12 are inactive) or off (e.g., the liquid crystal layer LC in the second region R12 is active, while the liquid crystal layer LC in the first region R11 is either active or inactive), as long as the sensor 12 and the second light-emitting unit 17b are activated, the sensor 12 can receive image light signals imperceptibly to the human eye, enabling it to monitor the vehicle's interior environment at all times. In other embodiments, the liquid crystal layer LC may utilize twisted nematic liquid crystals. When the liquid crystal layer LC in the first region R11 is in operation, the transmission axis (not shown) of the first polarizer P1 may be perpendicular to the transmission axis (not shown) of the second polarizer P2. In other embodiments, the liquid crystal layer LC may utilize vertical alignment liquid crystals or transverse electric field effect liquid crystals. When the liquid crystal layer LC in the first region R11 is in operation, the transmission axis (not shown) of the first polarizer P1 may be parallel to the transmission axis (not shown) of the second polarizer P2.

[0039] Referring to Figures 4 and 5 , the main differences between the display device 1A and the display device 1 of Figures 1 and 2 are described below. In the display device 1A, the display panel 10A includes two retaining walls S. In a top view, as shown in Figure 4 , the two retaining walls S surround the sensor 12 and the second light-emitting unit 17b, respectively. In some embodiments, the area or width of the first region R11 corresponding to the sensor 12 may be different from the area or width of the first region R11 corresponding to the second light-emitting unit 17b. For example, the area or width of the first region R11 corresponding to the sensor 12 may be smaller than the area or width of the first region R11 corresponding to the second light-emitting unit 17b, but this is not limited to this.

[0040] In some embodiments, at least one optical film (such as at least one optical film 18 shown in FIG. 7) may be disposed between the display panel 10A and the lamp board 16. The at least one optical film 18 may have a second through hole TH2, where the second through hole TH2 overlaps at least one of the sensor 12 and the second light emitting unit 17b. For example, the second through hole TH2 overlaps the sensor 12 (as shown in FIG. 7), overlaps the second light emitting unit 17b, or overlaps both the sensor 12 and the second light emitting unit 17b, but is not limited thereto. In some embodiments, the at least one optical film 18 may further have a third through hole (not shown in the figure) adjacent to the second through hole, where the third through hole corresponds to or overlaps the second light emitting unit 17b, but is not limited thereto.

[0041] In some embodiments, the inner edge of the retaining wall S or the width of the first region R11 may be designed according to the distance between the sensor 12 and the display panel 10A and the viewing angle of the sensor 12. As shown in FIG. 6, the distance between the sensor 12 and the display panel 10A is D, the viewing angle of the sensor 12 is θ, and the width of the first region R11 is W. The width W is greater than 0 and less than or equal to 4 * D * tan(θ / 2), that is, 0 < W ≤ 4 * D * tan(θ / 2). For example, the width W may be 0.5 * D * tan(θ / 2), 1 * D * tan(θ / 2), 1.5 * D * tan(θ / 2), 2 * D * tan(θ / 2), 3 * D * tan(θ / 2), 4 * D * tan(θ / 2), or any value between the above values. As shown in FIG. 6, the distance D may be the distance between the top surface of the sensor 12 and the top surface of the display panel 10A (for example, the top surface of the first polarizer P1) in the direction D3. The viewing angle θ is the angular range within which the sensor 12 can receive image light. Through the design of 0 < W ≤ 4 * D * tan(θ / 2), the sensor 12 can receive better image light signals or reduce the interference of stray light on the sensor 12 receiving image light, but the present disclosure is not limited thereto. It should be further understood that the features of FIG. 6 may be applicable to other embodiments of the present disclosure and are not limited to the architectures shown in FIGS. 4 and 5. For example, in the embodiments of FIGS. 1, 2, 7, and 8, the width of the first region R11 may also be greater than or equal to 0 and less than or equal to 4 * D * tan(θ / 2).

[0042] Referring to FIG7 , the main differences between the display device 1B and the display device 1A of FIG4 and FIG5 are described below. The display device 1B may not have the peripheral region R2 (see FIG4 and FIG5 ), and may not include the decorative layer 15 (see FIG4 and FIG5 ), but this is not limiting. Alternatively, the display device 1B may include both the peripheral region R2 and the decorative layer 15. In the display device 1B, the retaining wall S of the display panel 10B is disposed corresponding to the sensor 12 and not corresponding to the second light-emitting unit 17b. For example, in direction D3, the first region R11 overlaps with the sensor 12 and does not overlap with the second light-emitting unit 17b. The second region R12 corresponds to the dimming layer CF and overlaps the first light-emitting unit 17a and the second light-emitting unit 17b.

[0043] In some embodiments, the display device 1B may further include at least one optical film 18 ( FIG. 7 schematically illustrates four optical films 18 ). The at least one optical film 18 is disposed on the plurality of light-emitting units 17 and has a second through hole TH2, wherein the second through hole TH2 overlaps the sensor 12 . Specifically, the second through hole TH2 is disposed corresponding to the first region R11 . The at least one optical film 18 may include a diffuser, a brightness enhancement film (BEF), a reflective polarized brightness enhancement film (DBEF), or a combination thereof. In some embodiments, the at least one optical film 18 may further have a third through hole (not shown), wherein the third through hole corresponds to or overlaps the second light-emitting unit 17 b, but the present invention is not limited thereto.

[0044] By forming the second through hole TH2 in the at least one optical film 18 at the area overlapping the sensor 12, the interference of the at least one optical film 18 on image sensing can be reduced, thereby improving the clarity or accuracy of image sensing.

[0045] In some embodiments, as shown in FIG7 , the plurality of light-emitting units 17 may include a plurality of first light-emitting units 17a and at least one second light-emitting unit 17b, wherein the wavelength of the plurality of first light-emitting units 17a is different from the wavelength of the at least one second light-emitting unit 17b, and the at least one second light-emitting unit 17b is disposed corresponding to the display area R1. For example, the plurality of first light-emitting units 17a are visible light-emitting units, while the at least one second light-emitting unit 17b is a non-visible light-emitting unit, such as an infrared light-emitting unit, but this is not limited to such. In some embodiments, the dimming layer CF is disposed corresponding to or overlapping the plurality of first light-emitting units 17a. In some embodiments, the dimming layer CF is disposed corresponding to or overlapping the plurality of first light-emitting units 17a and the at least one second light-emitting unit 17b.

[0046] In some embodiments, the light emitting unit 17 is a packaged light emitting unit formed by at least one first light emitting unit 17a and at least one second light emitting unit 17b, but is not limited thereto.

[0047] In some embodiments, as shown in FIG7 , the plurality of light-emitting units 17 may be arranged in an array on a plane defined by directions D1 and D2 to form a direct-lit backlight module, but the present disclosure is not limited thereto. Alternatively, although not shown, the display device 1B may further include a light guide plate, and the plurality of light-emitting units 17 may be arranged along the sides of the light guide plate. For example, the plurality of light-emitting units 17 may be arranged in an array on a plane defined by directions D2 and D3 to form an edge-lit backlight module.

[0048] In some embodiments, the display device 1B may further include a support member 19 disposed within the first through hole TH1 and the second through hole TH2 and between the back plate 11 and the display panel 10B. The support member 19 may, for example, surround the sensor 12. For example, the support member 19 may be a hollow sleeve, and the support member 19 may be used to secure the sensor 12 and / or support the at least one optical film 18. In some embodiments, the support member 19 may be made of a light-absorbing or light-reflective material, or a light-absorbing or light-reflective layer may be formed on the sidewalls of the support member 19 to reduce light interference from adjacent light-emitting units 17. It should be understood that the stacking relationship and description shown in FIG7 (e.g., the optical film 18, the support member 19, the first light-emitting unit 17a, etc.) are also applicable to other embodiments.

[0049] Referring to FIG8 , the main differences between the display device 1C and the display device 1B of FIG7 are described below. The display device 1C includes a display area R1 and a peripheral area R2. The boundary IF between the display area R1 and the peripheral area R2 is indicated by a dashed box in FIG8 . Furthermore, in the display device 1C, the plurality of light-emitting units 17 include five second light-emitting units 17b, which are dispersedly arranged in an array formed by the plurality of first light-emitting units 17a. In some embodiments, considering the intensity of received light by the sensor 12, the shortest distance (e.g., distance DT) between the second light-emitting unit 17b and the first through hole TH1 is, for example, 3 mm ≤ DT ≤ 4500 mm. It should be understood that the design of FIG8 is also applicable to other embodiments.

[0050] In other embodiments, as shown in the display device 1D of FIG9 , the plurality of first light-emitting units 17a provided on the light board 16 can be arranged in an array along directions D1 and D2. Furthermore, the plurality of second light-emitting units 17b can be concentrated near the first through hole TH1 to shorten the optical path of non-visible light or reduce light loss, thereby helping to reduce the number of second light-emitting units 17b. It should be understood that the design of the light board 16 in FIG9 is also applicable to other embodiments.

[0051] In other embodiments, such as the display device 1E shown in FIG10 , the multiple first light-emitting units 17a disposed on the light board 16 may be staggered in direction D1 to improve light uniformity. Furthermore, the multiple second light-emitting units 17b may be dispersed on the light board 16 to balance light uniformity and light intensity. It should be understood that the design of the light board 16 in FIG10 is also applicable to other embodiments.

[0052] In summary, in the embodiments disclosed herein, the arrangement of a sensor overlapping the display area enhances the feasibility of a narrow-border design, enabling a display device with a narrow or even borderless border. Furthermore, the sensor's visibility can be reduced by overlapping the first and second polarizers.

[0053] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the above embodiments, persons skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present disclosure.

[0054] Although the embodiments and advantages of the present disclosure have been disclosed above, it should be understood that anyone skilled in the art may make changes, substitutions, and modifications without departing from the spirit and scope of the present disclosure, and that features from the various embodiments may be arbitrarily intermixed and interchanged to create new embodiments. Furthermore, the scope of protection of the present disclosure is not limited to the processes, machines, manufactures, compositions of matter, devices, methods, and steps described in the specific embodiments herein. Anyone skilled in the art will understand from the disclosure that any processes, machines, manufactures, compositions of matter, devices, methods, and steps currently or in the future that can perform substantially the same functions or achieve substantially the same results as the embodiments described herein may be used in accordance with the present disclosure. Therefore, the scope of protection of the present disclosure includes the aforementioned processes, machines, manufactures, compositions of matter, devices, methods, and steps. Furthermore, each claim constitutes a separate embodiment, and the scope of protection of the present disclosure also includes combinations of the various claims and embodiments. The scope of protection of the present disclosure shall be determined by the accompanying claims.

[0055] 1, 1A, 1B, 1C, 1D, 1E: Display device 10, 10A, 10B: Display panel 11: Back panel 12: Sensor 13: Cover 14: Bonding layer 15:Decorative layer 16: Light board 17: Light-emitting unit 17a: first light-emitting unit 17b: Second light-emitting unit 18: Optical film 19: Support A: Open A1: First opening area CF: dimming layer D, DT: distance D1, D2, D3: Direction IF:Intersection LC: Liquid crystal layer P1: first polarizer P2: Second polarizer R1: Display area R2: surrounding area R11: Zone 1 R12: Second Zone S: retaining wall SUB1: First substrate SUB2: Second substrate TH1: First through hole TH2: Second through hole W: width I-I', II-II': section line θ: Field of view

Claims

1. A display device having a display area and a peripheral area, the display device comprising: A display panel includes: a first polarizing plate disposed in the display area; and a second polarizing plate disposed in the display area; a back panel overlapping the display panel; a sensor disposed on the back panel and overlapping the first polarizing plate and the second polarizing plate in the display area; a lamp plate disposed on the back panel and having a first through-hole; a plurality of light-emitting units disposed on the lamp plate, wherein the first through-hole overlaps the sensor; at least one optical film disposed on the plurality of light-emitting units and having a second through-hole, wherein the second through-hole overlaps the sensor; and a support member disposed in the first through-hole and the second through-hole and disposed between the back panel and the display panel, wherein the support member surrounds the sensor.

2. The display device as claimed in claim 1, wherein the display panel further comprises: The first substrate is adjacent to the first polarizing plate; The second substrate is disposed corresponding to the first substrate and adjacent to the second polarizing plate; A liquid crystal layer is disposed between the first substrate and the second substrate; a barrier is disposed between the first substrate and the second substrate and is used to define a first area of ​​the display area and a second area adjacent to the first area. And a dimming layer, disposed between the liquid crystal layer and the second substrate and having a first opening area, wherein the first area corresponds to the sensor and the first opening area corresponds to the first area.

3. The display device as claimed in claim 2, wherein the distance between the sensor and the display panel is D, the field of view of the sensor is θ, the width of the first area is W, and 0 < W ≦ 4 * D * tan(θ / 2).

4. The display device as claimed in claim 2, wherein the top view shape of the retaining wall is a closed shape.

5. The display device as claimed in claim 1, wherein the plurality of light-emitting units includes a plurality of first light-emitting units and at least one second light-emitting unit, wherein the wavelengths of the plurality of first light-emitting units are different from the wavelengths of the at least one second light-emitting unit, and the at least one second light-emitting unit is disposed corresponding to the display area.

6. The display device as claimed in claim 1, wherein the sensor is a light sensor.

7. The display device as claimed in claim 1, wherein the transmission axis of the first polarizing plate is perpendicular to the transmission axis of the second polarizing plate.

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