TW202532943A - Display device - Google Patents

Abstract

A display device has a display region and a peripheral region. The display device includes a display panel, a backplane 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 region. The second polarizing plate is disposed in the display region. The backplane overlaps the display panel. The sensor is disposed on the backplane and overlaps the first polarizing plate and the second polarizing plate that are located in the display region.

Description

Display device

The present invention relates to an electronic device, and in particular to a display device.

Current display devices primarily place sensors (such as digital camera systems) in the peripheral area for image sensing. However, the size limitations of the sensors make it difficult to design narrow bezels for display devices.

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

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 also 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.

In order 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.

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, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

Throughout this disclosure and the accompanying patent 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 component by different names. This document does not intend to distinguish between components that have the same function but are named differently. Throughout the following description and patent claims, the words "including" and "comprising" are open-ended and should be interpreted as meaning "including, but not limited to..."

Directional terms used herein, such as "up," "down," "front," "back," "left," and "right," are used with reference to the accompanying drawings only. Therefore, the directional terms used are intended to illustrate, not to limit, this disclosure. In the accompanying drawings, each diagram depicts general features of methods, structures, and/or materials used in particular 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 layers, regions, and/or structures may be reduced or exaggerated for clarity.

In this disclosure, when a structure (or layer, component, or substrate) is located on/above another structure (or layer, component, or substrate), it can mean that the two structures are adjacent and directly connected, or it can mean that the two structures are adjacent but not directly connected. Indirect connection means that there is at least one intervening structure (or intervening layer, intervening component, intervening substrate, or intervening spacer) between the two structures, with the lower surface of one structure adjacent to or directly connected to the upper surface of the intervening structure, and the upper surface of the other structure adjacent to or directly connected to the lower surface of the intervening structure. The intervening structure can be composed of a single or multiple layers, a physical structure, or a non-physical structure, without limitation. In the present disclosure, when a certain structure is disposed “on” another structure, it may mean that the certain structure is “directly” on the other structure, or that the certain structure is “indirectly” on the other structure, that is, at least one structure is interposed between the certain structure and the other structure.

The terms "approximately," "substantially," or "substantially" 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 terms "ranging from a first value to a second value" or "ranging between a first value and a second value" mean that the range includes the first value, the second value, and other values therebetween.

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 from another or the order of their manufacturing process. Such ordinal numbers are used only to clearly distinguish a named element from another element with the same name. The claims and the specification may not use the same terminology; accordingly, the first component in the specification may be the second component in the claims.

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

In the present disclosure, the thickness, length and width can be measured using an optical microscope (OM), and the thickness or width can be measured from a cross-sectional image in an electron microscope, but the present disclosure is not limited thereto. In addition, any two values or directions used for comparison may have a certain error. In addition, the terms "a given range is from a first value to a second value", "a given range falls within the range from a first value to a second value", or "a given range is between a first value and a second value" indicate that the given range includes the first value, the second value and other values therebetween. If the first direction is perpendicular to the second direction, the angle between the first direction and the second direction may be between 80 degrees and 100 degrees; if the first direction is parallel to the second direction, the angle between the first direction and the second direction may be between 0 degrees and 10 degrees.

Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning 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 technology and this disclosure, and should not be interpreted in an idealized or overly formal manner unless specifically defined in the present disclosure.

In the present disclosure, the electronic device may include a display device, a backlight device, an antenna device, a packaging device, a sensing device, or a splicing device, but is not limited thereto. The electronic device may be a bendable or flexible electronic device. The display device may be a non-self-luminous display device or a self-luminous display device. The display device may, for example, include liquid crystal, a light-emitting diode, fluorescence, phosphor, quantum dot (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 (RF-Filter), a polarizer, a resonator, or an antenna, etc. 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, the electronic device may include electronic components, and the electronic components may include passive components and active components, such as capacitors, resistors, inductors, diodes, transistors, etc. The diode may include a light-emitting diode, a varactor diode, or a photodiode. The light-emitting diode may, for example, include 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. The 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 arrangement or combination of the aforementioned, but is not limited thereto. The packaging device may be a packaging device suitable for wafer-level package (WLP) technology or panel-level package (WLP) technology, such as a chip first process or a chip later (RDL first) process. In addition, the shape of the electronic device may be rectangular, circular, polygonal, a shape with curved edges, or other suitable shapes. The electronic device may have peripheral systems such as a drive system, a control system, a light source system, etc. to support a display device, an antenna device, a wearable device (for example, including augmented reality or virtual reality), a vehicle-mounted device (for example, including a car windshield), or a splicing device.

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 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 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 top views of light panels in two display devices according to some embodiments of the present disclosure, wherein FIG9 and FIG10 omit the display panel to clearly illustrate the relative arrangement relationship between the plurality of light-emitting units and the sensors.

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.

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 within the display area R1. The second polarizer P2 is also disposed within 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 within the display area R1.

Specifically, display area R1 can be used to display visual information, such as text or images. Peripheral area R2 (e.g., the grid area in FIG1 ) is located on at least one side of display area 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, peripheral area R2 may be adjacent to at least one edge of display area R1. For example, as shown in FIG1 , peripheral area R2 may be adjacent to and surround all four edges of display area R1, but this is not limited to the above. Alternatively, the display device 1 may not have the peripheral region R2, and the aforementioned peripheral circuits, circuit boards, flexible circuit boards, driving components, etc. may overlap the display region R1 in the thickness direction of the display device (such as direction D3), for example, being arranged on a side of the back plate 11 away from the display panel 10, but not limited to this.

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 through the bonding layer 14, and the cover plate 13 may be used to protect the components or film layers thereunder. The cover plate 13 may be a rigid substrate or a flexible substrate. The material of the cover plate 13 may include, for example, glass, quartz, ceramic, sapphire, plastic, or a combination thereof, but is not limited thereto. The plastic may include, but is not limited to, polycarbonate (PC), polyimide (PI), polypropylene (PP), polyethylene terephthalate (PET), other suitable flexible materials, or a combination thereof. The bonding layer 14 may include a light-transmitting adhesive layer, such as optical clear adhesive (OCA) or optical clear resin (OCR), but is not limited thereto.

A 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 board, flexible circuit board, driver components, etc.). The decorative layer 15 may be made of, but 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.

The display panel 10 can be used to provide image information. The display panel 10 can be a non-luminescent display panel or a self-luminescent display panel. A non-luminescent display panel can be, for example, a liquid crystal display panel, but is not limited thereto. A self-luminescent 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 LEDs, sub-millimeter LEDs, micro-LEDs, or quantum dot LEDs.

Taking a liquid crystal display panel as an example, as shown in FIG. 2 , 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, a barrier S, and a dimming layer CF.

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 a combination of the foregoing materials.

The second substrate SUB2 is positioned opposite 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 materials for the second substrate SUB2 can be similar to those for the first substrate SUB1 and will not be repeated here.

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.

A barrier 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 region 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 direction D3. In some embodiments, as shown in Figure 1, the barrier S may have a closed top view, wherein the area within the barrier S is the first region R11, and the area outside the barrier S is the second region R12. The closed shape may be rectangular, circular, or other polygonal, and is not limited herein. In some embodiments, the barrier S (or spacer) may be formed of an opaque material to reduce optical interference between the first region R11 and the second region R12. Alternatively, the barrier S may be formed of a translucent material, and a light-shielding material (not shown, such as a light-absorbing or light-reflecting material) may be formed on the sidewalls of the barrier S to reduce optical interference between the first region R11 and the second region R12 and/or improve light utilization. In some embodiments, as shown in FIG2 , the first region R11 within the barrier S may be filled with a liquid crystal layer LC to reduce the effect of light refraction on the sensor 12 receiving the optical signal, reduce visual differences between the first region R11 and the second region R12, or reduce the visibility of the first region R11.

The dimming layer CF is disposed between the liquid crystal layer LC and the second substrate SUB2 and has a first opening area A1, which may correspond to the first area 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, such as an area where no color filter pattern is provided. By making the first opening area A1 correspond to the first area R11, the interference of the dimming layer CF on the first area R11 (for example, light absorption, refraction and/or reflection, etc.) 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 improve the convenience of manufacturing and/or assembly.

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 also include multiple switching components and multiple electrodes. The multiple switching components and multiple electrodes may be sequentially arranged on the first substrate SUB1, and the multiple electrodes are electrically connected to the multiple switching components. By varying the voltage applied to the multiple electrodes, the tilting direction of the 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 elements or other elements that may affect light transmission (e.g., the aforementioned dimming layer CF or a black matrix (not shown)) may be disposed outside the first region R11 to reduce interference (e.g., light absorption, refraction, and/or reflection) caused by these elements in the first region R11, thereby improving image clarity or accuracy. Alternatively, the switching elements and/or dimming layer CF in the first region R11 may not be removed (e.g., the first and second regions R11, R12 of the display panel 10 may have the same configuration) and/or the barrier S may be omitted to enhance manufacturing and/or assembly convenience.

In the architecture of a non-self-luminous display panel, the display device 1 may further include a light board 16 and a plurality of 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 with the sensor 12. The plurality of light-emitting units 17 are disposed on the light board 16. In some embodiments, as shown in Figures 1 or 2, at least one of the plurality of 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 barrier S. In a top view, as shown in FIG1 , the barrier S may surround the sensor 12 and the second light-emitting unit 17b. The light emission wavelength of 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 (e.g., an infrared sensor), and the second light-emitting unit 17b may include a non-visible light emitting element (e.g., an infrared light-emitting diode), but the present invention is not limited thereto.

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 panel 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 17 b . For example, the second through hole TH2 may overlap the sensor 12 (as shown in FIG. 7 ), overlap the second light-emitting unit 17 b , or overlap both the sensor 12 and the second light-emitting unit 17 b , but the present invention is not limited thereto. In some embodiments, the at least one optical film 18 may further 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 17 b , but the present invention is not limited thereto.

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

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 barriers S can be one or more. Multiple barriers S can be provided to correspond to multiple sensors 12. For example, in a top view, the multiple barriers 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, with a barrier S surrounding each second light-emitting unit 17b and sensor 12. However, it should be understood that the number of second light-emitting units 17b, sensor 12, and barrier S, as well as their relative arrangement and/or number, can be varied as needed and are not limited to what is shown in Figure 1 . For example, the second light-emitting units 17b and sensor 12 can be arranged along direction D2, but this is not a limitation. Both directions D1 and D2 are perpendicular to direction D3, and directions D1 and D2 intersect, for example, are perpendicular to each other, but this is not a limitation.

In some embodiments, the first polarizer P1, liquid crystal layer LC, and second polarizer P2 can be configured so that the transmittance of the first region R11 for visible light (e.g., light with a wavelength between 380 nm and 750 nm) approaches zero, while the transmittance for light emitted by the second light-emitting unit 17b (e.g., non-visible light) is greater than or equal to 60% (see FIG3 ). This allows the non-visible light emitted by the second light-emitting unit 17b to pass through the first region R11 and be transmitted to the object, while the non-visible light reflected by the object can pass through the first region R11 and be transmitted to the sensor 12. The corresponding relationship between the transmission axis of the first polarizer P1 and the transmission axis of the second polarizer P2, along with the relationship between the inactive and active liquid crystal layers, is described below. When measuring the transmittance of the display panel 10, the light source and sensor are placed 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 the display panel 10 is equal to (b/a)*100%.

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 wavelengths between approximately 880 nm and approximately 1598 nm, for example, a sensor that receives wavelengths of approximately 940 nm, but is not limited thereto.

Referring again to Figures 1 and 2 , polarizers (such as first polarizer P1 and second polarizer P2) generally refer to structures that allow light with a specific polarization direction to pass through while absorbing or reflecting light with other polarization directions. For example, the polarizer material may include organic materials, inorganic materials, or a combination thereof. In some embodiments, the transmission axis of the first polarizer P1 (not shown) may be perpendicular to the transmission axis of the second polarizer P2 (not shown). In this configuration, the liquid crystal layer LC may utilize, for example, vertically aligned liquid crystals (VALC) or transverse electric field effect (LEF) liquid crystals (LTEC). 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 screen due to its near-zero transmittance to visible light. This conceals the sensor 12 or reduces its visibility, while still allowing the sensor 12 to receive image light signals. In other embodiments, the transmission axis of the first polarizer P1 (not shown) can be parallel to the transmission axis of the second polarizer P2 (not shown). In this configuration, the liquid crystal layer LC can utilize twisted nematic liquid crystals. In this way, 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 screen because its transmittance to visible light approaches zero, thereby hiding the sensor 12 or reducing the visibility of the sensor 12, but still allowing the sensor 12 to receive image light signals.

When the liquid crystal layer LC in the second region R12 is also inactive, the first region R11 and the second region R12 both display a black screen, for example, and have a consistent appearance, making it difficult for the human eye to detect the area where the sensor 12 is located (i.e., the first region R11). In some embodiments, the first region R11 can be configured to correspond to a non-displaying area of the second region R12 (e.g., the area where a motion island is located during video). In this way, when the liquid crystal layer LC in the second region R12 is inactive (i.e., when the second region R12 is displaying an image), the human eye will also find it difficult to detect the area where the sensor 12 is located. Whether the display panel 10 is powered on or off (e.g., the liquid crystal layers LC in both the first and second regions R11 and R12 are inactive) or on (e.g., the liquid crystal layer LC in the second region R12 is active, and the liquid crystal layer LC in the first region R11 is either active or inactive), by activating the sensor 12 and the second light-emitting unit 17b, the sensor 12 can receive image light signals in a manner imperceptible to the human eye, enabling the in-vehicle environment to be detected at any time. In other embodiments, the liquid crystal layer LC can utilize twisted nematic liquid crystals. When the liquid crystal layer LC in the first region R11 is active, the transmission axis of the first polarizer P1 (not shown) can be perpendicular to the transmission axis of the second polarizer P2 (not shown). In other embodiments, the liquid crystal layer LC may be vertically aligned liquid crystal or horizontal electric field effect liquid crystal. 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.

4 and 5 , the main differences between the display device 1A and the display device 1 of FIG. 1 and FIG. 2 are described below. In the display device 1A, the display panel 10A includes two baffles S. In a top view, as shown in FIG. 4 , the two baffles S surround the sensor 12 and the second light-emitting unit 17 b, 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 17 b. 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 17 b, but the present invention is not limited thereto.

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 10A and the light panel 16 . The at least one optical film 18 may have a second through hole TH2 , wherein the second through hole TH2 overlaps at least one of the sensor 12 and the second light-emitting unit 17 b . For example, the second through hole TH2 overlaps the sensor 12 (as shown in FIG. 7 ), overlaps the second light-emitting unit 17 b , or overlaps both the sensor 12 and the second light-emitting unit 17 b , but the present invention is not limited thereto. In some embodiments, the at least one optical film 18 may further 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 17 b , but the present invention is not limited thereto.

In some embodiments, the inner edge of the barrier S, or the width of the first region R11, can be designed based on the distance between the sensor 12 and the display panel 10A and the field of view of the sensor 12. As shown in FIG6 , the distance between the sensor 12 and the display panel 10A is D, the field of view of the sensor 12 is θ, and the width of the first region R11 is W. Width W is greater than 0 and less than or equal to 4*D*tan(θ/2), i.e., 0<W≦4*D*tan(θ/2). For example, the width W can 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 in between. As shown in FIG6 , the distance D can be the distance between the top surface of the sensor 12 and the top surface of the display panel 10A (e.g., the top surface of the first polarizer P1) in the direction D3. The field of view angle θ is the angular range over which the sensor 12 can receive image light. By designing 0＜W≦4*D*tan(θ/2), the sensor 12 can receive a better image light signal or reduce the interference of stray light on the image light received by the sensor 12, but the present disclosure is not limited to this. It should also be understood that the features of FIG. 6 are applicable to other embodiments of the present disclosure and are not limited to the structures shown in FIG. 4 and FIG. 5 . For example, in the embodiments of FIG. 1 , FIG. 2 , FIG. 7 , and FIG. 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).

Referring to FIG. 7 , the main differences between the display device 1B and the display device 1A of FIG. 4 and FIG. 5 are described below. The display device 1B may not have the peripheral region R2 (see FIG. 4 and FIG. 5 ), and the display device 1B may not include the decorative layer 15 (see FIG. 4 and FIG. 5 ), but the present invention is not limited thereto. Alternatively, the display device 1B may include the peripheral region R2 and the decorative layer 15. In the display device 1B, the barrier S of the display panel 10B is provided corresponding to the sensor 12 and not corresponding to the second light-emitting unit 17 b. For example, in the direction D3, the first region R11 overlaps with the sensor 12 and does not overlap with the second light-emitting unit 17 b. The second region R12 corresponds to the dimming layer CF and overlaps with the first light-emitting unit 17 a and the second light-emitting unit 17 b.

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 being disposed on the plurality of light-emitting units 17 and having 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 polarizing brightness enhancement film (DBEF), or a combination thereof. In some embodiments, the at least one optical film 18 may further include 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.

By forming the second through hole TH2 in the region of the at least one optical film 18 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.

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

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 the present invention is not limited thereto.

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 a side-lit backlight module.

In some embodiments, the display device 1B may further include a support member 19 disposed in 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 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-reflecting material, or a light-absorbing or light-reflecting layer may be formed on the sidewalls of the support member 19 to reduce light interference from the adjacent light-emitting unit 17. It should be understood that the stacking relationship and description shown in FIG. 7 (eg, optical film 18, support member 19, first light-emitting unit 17a, etc.) are also applicable to other embodiments.

Please refer to Figure 8, the main differences between the display device 1C and the display device 1B of Figure 7 are explained as follows. The display device 1C has a display area R1 and a peripheral area R2. The boundary IF between the display area R1 and the peripheral area R2 is marked with a dotted frame in Figure 8. In addition, in the display device 1C, the multiple light-emitting units 17 include five second light-emitting units 17b, and the five second light-emitting units 17b are dispersedly arranged in an array formed by a plurality of first light-emitting units 17a. In some embodiments, considering the intensity of received light of the sensor 12, the shortest distance between the second light-emitting unit 17b and the first through hole TH1 (such as the distance DT) is, for example, 3 mm to 4500 mm, that is, 3 mm≦DT≦4500 mm. It should be understood that the design of Figure 8 is also applicable to other embodiments.

In other embodiments, as shown in the display device 1D of FIG9 , the plurality of first light-emitting units 17a provided on the light panel 16 may be arranged in an array along directions D1 and D2. Meanwhile, the plurality of second light-emitting units 17b may 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 panel 16 in FIG9 is also applicable to other embodiments.

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

In summary, in the disclosed embodiments, overlapping the sensor with the display area enhances the feasibility of narrow bezel designs, enabling narrow or even bezel-free displays. Furthermore, overlapping the sensor with the first and second polarizers reduces the sensor's visibility.

The above embodiments are intended only to illustrate the technical solutions of the present disclosure and are not intended to limit the same. Although the present disclosure has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments may be modified or some or all of the technical features thereof may be replaced with equivalents. However, such 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.

Although the embodiments and advantages of the present disclosure have been disclosed above, it should be understood that any person skilled in the art may make changes, substitutions, and modifications without departing from the spirit and scope of the present disclosure, and features between the various embodiments may be arbitrarily intermixed and interchanged to form other new embodiments. Furthermore, the scope of protection of the present disclosure is not limited to the processes, machines, manufactures, material compositions, devices, methods, and steps described in the specific embodiments within the specification. Any person skilled in the art will understand from the content of this disclosure that any current or future developed processes, machines, manufactures, material compositions, devices, methods, and steps that can perform substantially the same functions or achieve substantially the same results as those described herein may be used in accordance with the present disclosure. Therefore, the scope of protection of the present disclosure includes the above-described processes, machines, manufacture, 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 the combination of individual claims and embodiments. The scope of protection of the present disclosure shall be determined by the attached patent applications.

1. 1A, 1B, 1C, 1D, 1E: Display device 10. 10A, 10B: Display panel 11. Backplane 12. Sensor 13. Cover plate 14. Bonding layer 15. Decorative layer 16. Lighting panel 17. Light-emitting unit 17a: First light-emitting unit 17b: Second light-emitting unit 18: Optical film 19: Support member A: Opening A1: First opening area CF: Dimming layer D, DT: Distance D1, D2, D3: Direction IF: Interface LC: Liquid crystal layer P1: First polarizer P2: Second polarizer R1: Display area R2: Peripheral area R11: First area R12: Second area S: retaining wall SUB1: first substrate SUB2: second substrate TH1: first through-hole TH2: second through-hole W: width I-I', II-II': section lines θ: field of view

Figure 1 is a schematic top view of a display device according to some embodiments of the present disclosure. Figure 2 is a schematic cross-sectional view corresponding to line I-I' in Figure 1. Figure 3 is a graph showing the wavelength-transmittance relationship of a display panel according to some embodiments of the present disclosure. Figure 4 is a schematic top view of a display device according to some embodiments of the present disclosure. Figure 5 is a schematic cross-sectional view corresponding to line II-II' in Figure 4. Figure 6 is a simplified schematic cross-sectional view of a display device according to some embodiments of the present disclosure. Figure 7 is a schematic partial cross-sectional view of a display device according to some embodiments of the present disclosure. Figure 8 is an exploded schematic view of a display device according to some embodiments of the present disclosure. Figures 9 and 10 are schematic top views of light panels in two display devices according to some embodiments of the present disclosure, respectively.

1: Display device

10: Display Panel

11: Back panel

12: Sensor

13: Cover plate

14: Joint layer

15: Decorative layer

16: Light board

17: Light-emitting unit

17b: Second light-emitting unit

A:Open your mouth

A1: First opening area

CF: dimming layer

D1, D2, D3: Direction

LC: Liquid Crystal Layer

P1: First polarizer

P2: Second polarizer

R1: Display area

R2: Peripheral Area

R11: Zone 1

R12: Second Zone

S:Block

SUB1: First substrate

SUB2: Second substrate

TH1: First through hole

I-I’: section line

Claims (10)

A display device having a display area and a peripheral area includes: a display panel comprising: a first polarizer disposed in the display area; a second polarizer disposed in the display area; a backplane overlapping the display panel; and a sensor disposed on the backplane and overlapping the first and second polarizers in the display area. The display device of claim 1, wherein the display panel further comprises: a first substrate adjacent to the first polarizer; a second substrate disposed corresponding to the first substrate and adjacent to the second polarizer; a liquid crystal layer disposed between the first and second substrates; a barrier disposed between the first and second substrates and defining a first region of the display area and a second region adjacent to the first region; and a dimming layer disposed between the liquid crystal layer and the second substrate and having a first opening region, wherein the first region corresponds to the sensor, and the first opening region corresponds to the first region. The display device of claim 2, wherein the distance between the sensor and the display panel is D, the field of view angle of the sensor is θ, the width of the first area is W, and 0＜W≦4*D*tan(θ/2). The display device as described in claim 2, wherein the top view shape of the retaining wall is a closed shape. The display device of claim 1 further comprises: a light board disposed on the back panel and having a first through-hole; and a plurality of light-emitting units disposed on the light board, wherein the first through-hole overlaps the sensor. The display device of claim 5 further comprises: 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. The display device of claim 6 further comprises: A support member disposed in the first through-hole and the second through-hole and disposed between the back plate and the display panel, wherein the support member surrounds the sensor. A display device as described in claim 5, wherein the multiple light-emitting units include multiple first light-emitting units and at least one second light-emitting unit, wherein the wavelength of the multiple first light-emitting units is different from the wavelength of the at least one second light-emitting unit, and the at least one second light-emitting unit is arranged corresponding to the display area. A display device as described in claim 1, wherein the sensor is a light sensor. The display device of claim 1, wherein the transmission axis of the first polarizer is perpendicular to the transmission axis of the second polarizer.