KR102543701B1 - Optical source assembly and display device including the same with improved image quality and external input sensing - Google Patents

Abstract

A light source assembly according to an embodiment of the present invention is disposed on a base layer, a first light source disposed on the base layer, and emitting a first light having a first wavelength range, disposed on the base layer, and disposed on the first wavelength range and A second light source emitting second light having a different second wavelength range, and a barrier disposed on the base layer and disposed between the first light source and the second light source.

Description

A light source assembly with improved image quality and performance of external input detection and a display device including the same

The present invention relates to a light source assembly and a display device including the same.

As modern society becomes highly informational, display devices are facing market demands for larger and thinner displays, and conventional CRT devices cannot sufficiently satisfy these demands, such as LCD (Liquid Crystal Display) devices and OLED devices. Demand for display devices such as (Organic Light Emitting Display) devices is increasing.

In the case of a display device, it is an input sensing device that includes not only a function of displaying an image but also a recognition function (input detection function) of receiving external information. For example, a contact type input sensing device as well as a non-contact type Input sensing devices are being developed.

Particularly, in recent years, the ratio of using unmanned kiosk devices as input sensing devices is rapidly increasing in general retail stores as well as banks and hotels due to various social and economic factors.

An object to be solved by the present invention is to provide a light source assembly capable of improving external input sensing performance and a display device including the same.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above problems, a light source assembly according to embodiments of the present invention includes a base layer, a first light source disposed on the base layer and emitting a first light having a first wavelength range, the A second light source disposed on the base layer and emitting second light having a second wavelength range different from the first wavelength range, and disposed on the base layer, between the first light source and the second light source A barrier may be included.

In order to solve the above problems, a display device according to embodiments of the present invention is disposed on a light source assembly, the light source assembly, and displays an image using the first light provided from the light source assembly. and a sensor layer disposed on the display panel and including at least one sensor for detecting an external input using the second light provided from the light source assembly. The light source assembly includes a base layer, a first light source disposed on the base layer and emitting the first light having a first wavelength range, and a second light source disposed on the base layer and different from the first wavelength range. It may include a second light source for emitting the second light having a wavelength range, and a barrier disposed on the base layer and disposed between the first light source and the second light source.

A light source assembly and a display device including the same according to embodiments of the present invention include a first light source emitting first light (visible light) for image display and a second light (infrared light) for detecting an external input. By including a barrier disposed between the second light sources, display image quality and external input sensing performance may be improved.

In addition, the light source assembly and the display device including the light source assembly according to embodiments of the present invention include a light blocking layer disposed above the first light source and the second light source and defining an opening, thereby improving display image quality and simultaneously inputting external input. The performance of detection can be improved.

Effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present invention.

1 and 2 are diagrams schematically illustrating a display device according to embodiments of the present invention.
3 is a schematic cross-sectional view of a display device according to embodiments of the present invention.
4A is a cross-sectional view illustrating an example of a sensor layer included in the display device of FIG. 3 .
4B is a plan view illustrating an example of a sensor layer included in the display device of FIG. 3 .
5 is a cross-sectional view illustrating an example of a light source assembly included in the display device of FIG. 3 .
6A to 6E are plan views illustrating an example of a light source assembly included in the display device of FIG. 3 .
7 is a cross-sectional view illustrating another example of a light source assembly included in the display device of FIG. 3 .
8 is a cross-sectional view illustrating another example of a light source assembly included in the display device of FIG. 3 .
9 is a cross-sectional view illustrating another example of a light source assembly included in the display device of FIG. 3 .
10 is a cross-sectional view illustrating another example of a light source assembly included in the display device of FIG. 3 .
11 is a cross-sectional view illustrating another example of a light source assembly included in the display device of FIG. 3 .
12 is a schematic cross-sectional view of a display device according to embodiments of the present invention.
FIG. 13 is a plan view illustrating an example of a light blocking layer included in the light source assembly of the display device of FIG. 10 .
FIG. 14 is a plan view illustrating another example of a light blocking layer included in the light source assembly of the display device of FIG. 10 .

Like reference numerals have been used for like elements throughout the description of each figure. In the accompanying drawings, the dimensions of the structures are shown enlarged than actual for clarity of the present invention. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

In addition, when a part is said to be "connected" to another part, this includes not only the case where it is directly connected but also the case where it is connected with another element interposed therebetween.

In the case of a description of a positional relationship, for example, 'on top of', 'on top of', 'at the bottom of', 'next to', etc. Or, unless 'directly' is used, one or more other parts may be located between the two parts.

When an element or layer is referred to as “on” another element or layer, it includes all cases where another element or layer is directly on top of another element or another layer or other element intervenes therebetween.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail. The same reference numerals are used for the same components in the drawings, and redundant descriptions of the same components are omitted.

1 and 2 are diagrams schematically illustrating a display device according to embodiments of the present invention.

1 is a plan view schematically illustrating a display device 1000 according to embodiments of the present invention, and FIG. 2 is a display device 1000 according to embodiments of the present invention implemented as a kiosk device. An example is shown.

Meanwhile, in FIGS. 1 and 2 , an input sensing panel (TSP) included in a display device 1000 according to embodiments of the present invention and a driving circuit (DCP) for driving the input sensing panel (TSP) are shown. there is.

Meanwhile, for convenience of explanation, the input sensing panel (TSP) and the driving circuit (DCP) are separately illustrated in FIGS. 1 and 2 , but the exemplary embodiment of the present invention is not limited thereto. Depending on embodiments, all or part of the driving circuit DCP may be integrally implemented on the input sensing panel TSP.

Referring to FIG. 1 , the display apparatus 1000 may include an input sensing panel TSP and a driving circuit DCP for driving the input sensing panel TSP.

The display device 1000 may be provided in various shapes. For example, the display device 1000 may be provided in the shape of a rectangular plate having two pairs of sides parallel to each other, but the embodiment of the present invention is not limited thereto. When the display device 1000 is provided in the shape of a rectangular plate, one pair of two pairs of sides may be provided longer than the other pair of sides. In FIG. 1, for convenience of description, a case in which the display device 1000 has a rectangular shape having a pair of long sides and a pair of short sides is shown, and the extension direction of the pair of long sides is the second direction DR2. , The extension direction of the pair of short sides is shown as a first direction DR1. Depending on the embodiment, the display device 1000 provided in the form of a rectangular plate may have a round corner at which one long side and one short side come into contact. Also, according to embodiments, the display device 1000 may be provided in a circular or elliptical shape.

Meanwhile, the normal direction of the surface defined by the first direction axis extending in the first direction DR1 and the second direction axis extending in the second direction DR2, that is, the thickness direction of the input sensing panel TSP is It may be defined as the third direction DR3.

The front (or upper surface) and rear surface (or lower surface) of each member or unit of the display device 1000 described below may be divided along the third direction DR3 . However, the first to third directions DR1 , DR2 , and DR3 shown in this embodiment are only examples, and the first to third directions DR1 , DR2 , and DR3 are converted into other directions as a relative concept. It can be. Hereinafter, the same reference numerals refer to the first to third directions DR1 , DR2 , and DR3 .

The input sensing panel TSP may include a display area AA and a non-display area NA. The non-display area NA may be positioned on at least one side of the display area AA. For example, the non-display area NA may be provided in a form surrounding the display area AA.

The non-display area NA is an area surrounding at least one side of the display area AA, and may be an area other than the display area AA. According to example embodiments, the non-display area NA may include a wiring area, a pad area, and/or various dummy areas.

In the display area AA, an image may be displayed by providing a plurality of first light sources 100 . Also, in one embodiment, one area of the display area AA may be set as a sensing area SA capable of sensing a user's external input by providing a plurality of second light sources 200 . That is, at least a portion of the display area AA may be the sensing area SA.

In one embodiment, only a portion of the display area AA may be set as the sensing area SA. However, the embodiment of the present invention is not limited thereto, and for example, the entirety of the display area AA may be set as the sensing area SA. When the entire display area AA is set as the sensing area SA, the non-display area NA surrounding the display area AA may become the non-sensing area NSA.

A plurality of first light sources 100 may be provided in the display area AA, and a plurality of second light sources 200 may be provided in the one area of the display area AA, for example, the sensing area SA. It can be. According to embodiments, the plurality of first light sources 100 emit first light in a first wavelength range, and the plurality of second light sources 200 emit a second wavelength range at least partially different from the first wavelength range. It is possible to emit the second light in .

Here, the meaning that a specific light source emits light in a specific wavelength range may be interpreted as meaning that the specific light source generally emits light having a dominant peak in the light spectrum. That is, it should be understood that emission of light in the wavelength range of visible light does not mean that there is no emission of light outside the wavelength range of visible light, such as a small amount of ultraviolet or infrared light.

Depending on the embodiment, the second wavelength range of the second light emitted by the second light source 200 may be greater than the first wavelength range of the first light emitted by the first light source 100 . For example, the first wavelength range may be at or within the wavelength range of visible light, and the second wavelength range may be at or within the wavelength range of infrared light. For example, a visible light LED emitting first light in a visible light wavelength range may be employed as the first light source 100 and an infrared LED emitting second light in an infrared wavelength range may be employed as the second light source 200. .

Meanwhile, each of the plurality of first light sources 100 emits first light in a first wavelength range, but this should not be construed as limiting that all first light sources 100 emit light in the same wavelength range. do. For example, assuming that the first wavelength range is 400 nm to 700 nm, all first light sources 100 may emit light in a wavelength range of 400 nm to 700 nm, but some of the first light sources 100 may emit light in a wavelength range of 400 nm to 700 nm. While emitting light in a wavelength range of 500 nm to 600 nm, other first light sources 100 may emit light in a wavelength range of 500 nm to 700 nm. In addition, the wavelength ranges of all first light sources 100 do not necessarily cover 400 nm to 700 nm, some first light sources 100 have 400 nm to 450 nm, other first light sources 100 have 520 nm to 570 nm, or As in the case where other first light sources 100 have a wavelength range of 650 nm to 700 nm, a specific wavelength range (eg, 450 nm to 520 nm, 570 nm to 650 nm) among the 400 nm to 700 nm defined as the emission wavelength range is not emitted. Even in this case, if the emission wavelength of the first light sources 100 is within the range of 400 nm to 700 nm, the first wavelength range of the first light sources 100 may be interpreted as being in the range of 400 nm to 700 nm. Meanwhile, it goes without saying that the same interpretation as that of the plurality of first light sources 100 may also be applied to the plurality of second light sources 200 .

As the plurality of first light sources 100 are provided in the display area AA, an image may be displayed. For example, the first light emitted from the first light source 100 is incident on an input sensing panel (TSP), for example, a display panel included in the input sensing panel (TSP), and the display panel is An image may be displayed using light. As an example, the display panel may be implemented as a liquid crystal display panel, but is not limited thereto.

In addition, as the plurality of second light sources 200 are provided in the one area of the display area AA, that is, the sensing area SA, an external input (eg, a user's input) is received on the sensing area SA. etc. can be detected. For example, the second light emitted from the second light source 200 and incident on the input sensing panel TSP passes through the input sensing panel TSP as it is, and an external object (eg, For example, a user's finger, etc.) may be reflected and incident on a plurality of light receiving elements included in the sensor layer of the input sensing panel TSP. Here, each of the light receiving elements includes a photoelectric conversion element to generate a predetermined signal in response to incident reflected light, and the corresponding signal is transmitted to the input detector TDP to the external object (e.g., a user's finger). etc.) can be determined.

The driving circuit DCP may drive the input sensing panel TSP. According to example embodiments, the driving circuit DCP may include a panel driving unit PDP and an input detection unit TDP. For convenience of explanation, FIGS. 1 and 2 illustrate that the panel driving unit PDP and the input detection unit TDP are separate components, but the exemplary embodiment of the present invention is not limited thereto. For example, at least a part of the input detector TDP may be integrated with the panel drive unit PDP or operated in conjunction with the panel drive unit PDP.

The panel driver PDP may supply driving signals for driving the display panel included in the first light source 100, the second light source 200, and the input sensing panel TSP. Accordingly, the input sensing panel TSP may display an image corresponding to the driving signal.

The input detector TDP may detect input information of an external object (eg, a user's finger) based on the detection signals received from the above-described light receiving elements.

Meanwhile, the display device 1000 may be a flat display device, a flexible display device, a curved display device, a foldable display device, or a bendable display device. Also, according to embodiments, the display device 1000 may be applied to a transparent display device, a head-mounted display device, a wearable display device, and the like.

In one embodiment, further referring to FIG. 2 , the display device 1000 may be implemented as a kiosk device. For example, the display device 1000 implemented as a kiosk device is configured to drive the body part BD and the input detection panel TSP mounted on the body part BD of the kiosk device and the input detection panel TSP. It may include a driving circuit (DCP) for

A plurality of menu bars MNB may be formed on the background screen on the display area AA of the input sensing panel TSP. The menu bars (MNBs) are formed in a rectangular shape and may be spaced apart from each other by a predetermined interval, but are not limited thereto. Operation functions by input detection and non-detection may be activated in the inner area of the menu bar MNB, and operation functions by input detection and non-detection may be inactivated in the outer area of the menu bar MNB. Meanwhile, the menu bar MNB shown in FIG. 2 is merely exemplary, and the menu bar MNB may be formed differently for each screen.

Meanwhile, when a plurality of kiosk devices as described above are installed in stores at different locations and the kiosk devices are connected to one central management server, a signal input method may be controlled remotely by the management server. For example, the management server may change the kiosk input method uniformly according to the government's quarantine guidelines, and adjust the kiosk to operate in an input sensing type or non-sensing type.

Meanwhile, although FIG. 2 exemplarily shows that the display device 1000 according to an embodiment of the present invention is implemented as a kiosk device, as described above, the embodiment of the present invention is not limited thereto, and the embodiment of the present invention The display device 1000 according to examples may be applied to various display devices and input sensing devices.

3 is a schematic cross-sectional view of a display device according to embodiments of the present invention.

4A is a cross-sectional view illustrating an example of a sensor layer included in the display device of FIG. 3 .

4B is a plan view illustrating an example of a sensor layer included in the display device of FIG. 3 .

1 to 3 , the display apparatus 1000 according to embodiments of the present invention includes an accommodating part RCP, a light source assembly LSA disposed on a lower surface of the accommodating part RCP, and a light source assembly ( It may include a display panel (DP) disposed on the LSA, and a sensor layer (SSL) disposed on the display panel (DP).

The accommodating portion RCP is for accommodating members included in the display device 1000 and may correspond to, for example, the body portion BD of the kiosk device described with reference to FIG. 2 . For example, as shown in FIG. 3 , when viewed from one side, the receiving portion RCP may have a rectangular shape with one side open as a whole, but the shape of the receiving portion RCP is limited thereto. it is not going to be

Meanwhile, at least a portion of the accommodating part RCP, for example, a lower surface (or a bottom surface) of the accommodating part RCP may constitute the base layer BSL of the light source assembly LSA. That is, components of the light source assembly LSA (eg, the first light source 100, the second light source 200, and the barrier 300) on the lower surface (or bottom surface) of the accommodating part RCP. can be placed.

The light source assembly LSA may include a base layer BSL, a plurality of first light sources 100 , a plurality of second light sources 200 , and a plurality of barriers 300 .

The plurality of first light sources 100 and the plurality of second light sources 200 are disposed spaced apart from each other on the base layer BSL and may be alternately disposed along one direction. For example, the first light sources 100 and the second light sources 200 may be spaced apart from each other and arranged in a lattice form. The arrangement relationship between the first light source 100 and the second light source 200 will be described in more detail with reference to FIGS. 6A to 6E.

Each of the plurality of first light sources 100 and the plurality of second light sources 200 may be a point light source. For example, each of the plurality of first light sources 100 and the plurality of second light sources 200 may be configured as an LED point light source, but is not limited thereto.

Meanwhile, as described with reference to FIG. 1 , in one embodiment, the first light source 100 is a visible light LED light source emitting first light in the visible light wavelength range, and the second light source 200 emits first light in the infrared wavelength range. 2 It may be an infrared LED light source that emits light.

Meanwhile, as shown in FIG. 3 , the first light source 100 and the second light source 200 included in the light source assembly LSA of the display device 1000 according to embodiments of the present invention are the display panel DP ) may be located at the bottom of That is, the display device 1000 according to embodiments of the present invention may include a direct type light source assembly (LSA).

In such a direct type structure, a design considering securing an optical distance for optical uniformity is required. Design is important.

Also, in the direct-type structure, since the second light emitted from the second light source 200 is used to detect an external input (eg, a user's input, etc.), the optical transmittance for the second light is higher. can be important For example, in the direct-type structure, the second light is emitted from the second light source 200, passes through the display panel DP, is reflected from an external object (eg, a user's finger, etc.), and then the sensor layer (SSL), transmittance of the second light may be a problem due to various members included in the display panel DP in the process of transmitting the second light through the display panel DP. For example, when the display panel DP is composed of the above-described liquid crystal display panel, the display panel DP includes an optical sheet such as a diffusion plate, a diffusion sheet, a horizontal prism sheet, a vertical prism sheet, a retroreflective sheet, and the like, and liquid crystal ( It includes a liquid crystal cell containing liquid crystal molecules, and the transmittance of the second light emitted from the second light source 200 may decrease while passing through the optical sheet and the liquid crystal cell. For example, transmittance of the second light emitted from the second light source 200 may drop to 30% or less (eg, about 26%) while passing through the optical sheet and the liquid crystal cell. In this way, when the optical transmittance of the second light decreases, even if the second light is reflected from an external object (eg, a user's finger) and provided to the light receiving element, the low optical transmittance of the second light causes the recognition value of the light receiving element ( Alternatively, the recognition rate) may be lowered and the input sensing function may be lowered.

Therefore, in order to prevent such input detection function deterioration, the display device 1000 (or the light source assembly LSA) according to embodiments of the present invention prevents leakage of the second light emitted from the second light source 200. It may include a plurality of barriers 300 for minimizing and guiding the second light in a direction (eg, the third direction DR3) toward an external object (eg, the user's finger). there is.

Each of the plurality of barriers 300 may be disposed on the base layer BSL and may be disposed between the plurality of first light sources 100 and the plurality of second light sources 200 . As such, since the barrier 300 is disposed between the first light sources 100 and the second light sources 200, the second light emitted from the second light sources 200 is directed toward an external object (eg, the user's finger, etc.) may be guided in a direction (eg, the third direction DR3). In this case, the input sensing function may be improved by increasing the total light amount of the second light in the direction (eg, the third direction DR3) toward the external object (eg, the user's finger). there is. The light guide of the second light by the barrier 300, the shape and arrangement of the barrier 300 will be described in more detail with reference to FIGS. 5 to 11 .

Meanwhile, since each of the plurality of barriers 300 is disposed between the first light sources 100 and the second light sources 200, not only the second light emitted from the second light source 200 but also the first light source 100 The first light emitted from ) is also guided in a direction (eg, the third direction DR3) toward an external object (eg, the user's finger), so that the total amount of light for the first light is also increased. Image display quality can also be improved.

The display panel DP may be disposed on the light source assembly LSA. The display panel DP may include an optical sheet and a liquid crystal cell. Here, the optical sheet may include a diffusion plate, a diffusion sheet, a horizontal prism sheet, a vertical prism sheet, a retroreflective sheet, and the like. In addition, in the case of a liquid crystal cell, it may include two substrates and a liquid crystal layer disposed between them and including liquid crystal molecules. For example, the display panel DP may be a liquid crystal display panel.

The sensor layer SSL may be disposed on the display panel DP. The sensor layer SSL may include a plurality of light receiving elements for sensing an external input (eg, a user's input).

To describe this in more detail, referring to FIGS. 4A and 4B , the sensor layer SSL may include a sensor substrate SSB and a plurality of light receiving elements IRSS.

The sensor substrate SSB is a base substrate of the sensor layer SSL and may be a substantially transparent light-transmitting substrate. The sensor substrate SSB may be a rigid substrate including glass or tempered glass, or a flexible substrate made of plastic. However, the material of the sensor substrate SSB is not limited thereto, and the sensor substrate SSB may be made of various materials.

A plurality of light receiving elements IRSS may be disposed on the sensor substrate SSB. For example, as shown in FIG. 4B , the light receiving elements IRSS may be arranged in a lattice shape on the sensor substrate SSB. For example, the light receiving elements IRSS may be spaced apart from each other along the first and second directions DR1 and DR2 .

The light receiving element IRSS is an element that receives light of a specific wavelength range and outputs a specific signal, and may be a photoelectric conversion element. Although not limited thereto, light of an infrared wavelength (eg, second light emitted from the second light source 200) may be exemplified as the light of the specific wavelength. As the photoelectric conversion element, a thin film transistor, a photodiode, and a photoresistor may be exemplified. In some embodiments, the light receiving element IRSS may include a semiconductor layer such as a PN diode or a PIN diode. The semiconductor layer included in the light receiving element IRSS may include materials such as a-Si, p-Si, and c-Si. As a specific material, a-SiGe:H may be exemplified, but is not limited thereto.

In addition, a signal line (not shown) may be connected to each light receiving element IRSS, and a detection signal generated from the light receiving element IRSS may be transmitted to the input detector TDP (refer to FIG. 1 ). The input detector (TDP, see FIG. 1 ) may determine the position and shape of an external object (eg, a user's finger) by using a detection signal transmitted from each light receiving element IRSS.

For example, a detection signal measured according to a state in which an external object (eg, a user's finger, etc.) is located on the input detection panel (TSP, see FIG. 1), that is, received at a specific location where the external object is located A light receiving element (IRSS) in which the amount of light of infrared rays (second light) changed, the second light source 200 emitting infrared rays (second light) in which the amount of light was changed, and each light amount changed An input detection unit (TDP, see FIG. 1) has a mapping table for determining coordinates matched to information such as change in light amount for infrared rays (second light) and measured light amount before/after the position of the external object. may be stored on the

The input detector (TDP, see FIG. 1) uses the detection signal provided from each light receiving element (IRSS) and the mapping table to obtain input coordinates and/or input coordinates at which the external object is located on the input detection panel (TSP) and/or the input detection panel. The distance of the external object from (TSP) can be determined.

In addition, the input detection unit (TDP, see FIG. 1 ) may identify an external object when the external object approaches the input detection panel TSP within a specified distance without direct contact on the input detection panel TSP. It can be processed to perform a designated operation without contacting the sensing panel (TSP). According to various embodiments, an external input for processing a designated operation may be defined as an air touch in a state in which an external object does not directly contact the input sensing panel TSP.

Meanwhile, although not shown, an optical filter may be formed above the light receiving element IRSS. The optical filter may serve to selectively transmit light in a specific wavelength range. For example, an optical filter that blocks light of other wavelengths so that only infrared light reflected from an external object among light incident from an upper portion of the input sensing panel TSP (eg, the sensor layer SSL) is incident If employed, the reliability of recognition of an external object can be further improved.

Hereinafter, with reference to FIGS. 5 to 11 , the specific shape and arrangement relationship of the barrier 300 included in the light source assembly LSA will be described in more detail.

5 is a cross-sectional view illustrating an example of a light source assembly included in the display device of FIG. 3 .

6A to 6E are plan views illustrating an example of a light source assembly included in the display device of FIG. 3 .

1 to 5, as described above, the light source assembly LSA includes a base layer BSL, a plurality of first light sources 100 disposed on the base layer BSL, and a plurality of second light sources. 200 , and a plurality of barriers 300 disposed between the first light sources 100 and the second light sources 200 .

Since the plurality of barriers 300 are disposed between the first light source 100 and the second light source 200, respectively, the first light L1 emitted from the first light source 100 and the light emitted from the second light source 200 The second light L2 may be light-guided in a third direction DR3, that is, toward an external object. For example, as shown in FIG. 5 , the first light L1 emitted from the first light source 100 may travel in the third direction DR3 by being reflected by the barriers 300 disposed on both sides. there is. Similarly, the second light L2 emitted from the second light source 200 may travel in the third direction DR3 by being reflected by the barrier 300 disposed on both sides. Accordingly, display image quality may be improved and performance of external input detection may be improved.

In one embodiment, the barrier 300 may include a light reflecting material, or a light reflecting material may be applied on a side surface of the barrier 300 . Accordingly, propagation of the first light L1 and/or the second light L2 in the third direction DR3 may be further improved.

For a more detailed description of the arrangement relationship between the first light source 100, the second light source 200, and the barrier 300, further referring to FIG. 6A, the first light source 100 and the second light source ( 200) may be arranged in a lattice form. For example, the first light sources 100 and the second light sources 200 are spaced apart from each other along the first and second directions DR1 and DR2, and the first light source 100 and the second light source 200 are spaced apart from each other. 200 may be arranged to alternate with each other.

In one embodiment, each of the barriers 300 is a closed loop surrounding the second light source 200 on a plane (eg, on a plane along the first and second directions DR1 and DR2). -loop) can be arranged in a rectangular shape. Accordingly, the second light L2 emitted from the second light source 200 may be light-guided toward the third direction DR3.

Meanwhile, in FIG. 6A , the barrier 300 is illustrated as having a closed-loop rectangular shape, but this is merely illustrative, and the planar shape and shape of the barrier 300 are not limited thereto.

For example, further referring to FIGS. 6B and 6C, as shown in FIG. 6A, the barrier 300_1 included in the light source assembly LSA_1 includes upper and lower ends that are open, respectively, or FIG. 6B As shown in , the barrier 300_2 included in the light source assembly LSA_2 may include open ends on the left and right sides, respectively.

Meanwhile, in FIG. 6A , the barrier 300 is illustrated as having a rectangular shape, but this is merely exemplary, and the shape of the barrier 300 may be formed in various ways.

For example, further referring to FIG. 6D , the barrier 300_3 included in the light source assembly LSA_3 may have a circular shape. In addition to this, the barriers 300, 300_1, 300_2, and 300_3 have polygonal shapes such as triangles, pentagons, and hexagons, in addition to the shapes of the barriers 300, 300_1, 300_2, and 300_3 shown in FIGS. 6A to 6D. It can have various shapes.

Meanwhile, in FIG. 6A , the first light sources 100 and the second light sources 200 are illustrated as being arranged in a lattice form, but this is merely exemplary, and the first light sources 100 and the second light sources 200 The arrangement relationship of is not limited thereto.

For example, further referring to FIG. 6E , the first light sources 100_1 included in the light source assembly LSA_4 are spaced apart from each other along the first and second directions DR1 and DR2 so as to be arranged in a lattice form. And, the second light sources 200_1 may be arranged to be spaced apart from each other by a predetermined distance in a diagonal direction with respect to each of the first light sources 100_1. Meanwhile, the barrier 300_4 may be disposed in a form surrounding the second light sources 200_1.

7 is a cross-sectional view illustrating another example of a light source assembly included in the display device of FIG. 3 .

FIG. 7 shows a modified embodiment of the embodiment of FIG. 5 in relation to the shape of the barrier 300_5.

In Figure 7, in order to avoid redundant description, the description is focused on the points different from the above-described embodiment, parts not specifically described follow the above-described embodiment, the same number refers to the same component, and similar numbers refer to similar components. represents an element.

Referring to FIG. 7 , the light source assembly LSA_5 includes a base layer BSL, a plurality of first light sources 100 disposed on the base layer BSL, a plurality of second light sources 200, and a first A plurality of barriers 300_5 disposed between the light sources 100 and the second light sources 200 may be included.

In one embodiment, each of the barriers 300_5 may have a reverse taper shape. For example, as shown in FIG. 7 , the lower surface of the barrier 300_5 contacts at least a portion of the upper surface of the base layer BSL, and the cross-sectional area of the barrier 300_5 extends from the base layer BSL in a third direction ( DR3) may increase with distance. That is, the area of the upper surface of the barrier 300_5 may be larger than the area of the lower surface of the barrier 300_5.

)는 90°를 초과할 수 있다(예를 들어,

>90°).In other words, on the cross-sectional view of the light source assembly LSA_5 shown in FIG. 7, the angle between the side surface (or inclined surface) and the bottom surface of the barrier 300_5 (

) may exceed 90° (e.g.,

>90°).

8 is a cross-sectional view illustrating another example of a light source assembly included in the display device of FIG. 3 .

9 is a cross-sectional view illustrating another example of a light source assembly included in the display device of FIG. 3 .

10 is a cross-sectional view illustrating another example of a light source assembly included in the display device of FIG. 3 .

11 is a cross-sectional view illustrating another example of a light source assembly included in the display device of FIG. 3 .

8 and 10 show a modified embodiment of the embodiment of FIG. 5 with respect to the reflective layers 400 and 400_2, respectively, and FIGS. 9 and 11 show the embodiment of FIG. 7 with respect to the reflective layers 400_1 and 400_3, respectively. Shows a modified embodiment for.

In Figures 8 to 11, in order to avoid redundant description, different points from the above-described embodiment are mainly described, and parts not specifically explained follow the above-described embodiment, the same number refers to the same component, and similar number represents a similar component.

First, referring to FIGS. 8 and 9 , the light source assembly LSA_6 or LSA_7 includes a base layer BSL, a plurality of first light sources 100 disposed on the base layer BSL, and a plurality of second light sources ( 200), and a plurality of barriers 300 or 300_5 disposed between the first light sources 100 and the second light sources 200.

In one embodiment, the light source assemblies LSA_6 and LSA_7 may further include reflective layers 400 and 400_1 disposed to cover side surfaces and top surfaces of the barriers 300 and 300_5, respectively.

In one embodiment, the reflective layers 400 and 400_1 may include a light reflective material. For example, the reflective layers 400 and 400_1 may include at least one of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF/Ca, LiF/Al, Mo, Ti, and Cu. may contain one. As another example, the reflective layers 400 and 400_1 may include at least one of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF/Ca, LiF/Al, Mo, Ti, and Cu. It may be composed of an alloy, nitride or oxide containing. These may be used alone or in combination with each other, and the reflective layers 400 and 400_1 may have a multilayer structure.

As such, as the reflective layers 400 and 400_1 covering the side and top surfaces of the barriers 300 and 300_5 are further disposed, the first light emitted from the first light source 100 and/or the second light source 200 When the emitted second light is reflected from the barriers 300 and 300_5 and proceeds in the third direction DR3, the reflective layers 400 and 400_1 disposed on the side and upper surfaces of the barriers 300 and 300_5 prevent the first light from being emitted. Since the reflectance of the light and/or the second light is increased, the light is more effectively emitted in the third direction DR3 of the first light and/or the second light, that is, toward an external object (eg, a user's finger). can be guided.

For example, as shown in FIG. 8 , the reflective layer 400 may be formed to cover both side surfaces and the upper surface of the rectangular barrier 300 . In this case, the reflective layer 400 may have a rectangular shape corresponding to the shape of the barrier 300 .

As another example, as shown in FIG. 9 , the reflective layer 400_1 may be formed to cover both side surfaces and an upper surface of the barrier 300_5 having a reverse tapered shape. In this case, the reflective layer 400_1 may have a reverse tapered shape corresponding to the shape of the barrier 300_5.

Meanwhile, in FIGS. 8 and 9 , it is shown that the reflective layers 400 and 400_1 are disposed to cover not only both side surfaces of the barrier 300 or 300_5 but also the upper surface, but the embodiment of the present invention is not limited thereto.

For example, as shown in FIG. 10, the reflective layer 400_2 of the light source assembly LSA_8 is arranged to cover only both sides of the barrier 300 having a rectangular shape, or as shown in FIG. 11, the light source The reflective layer 400_3 of the assembly LSA_9 may be disposed to cover only opposite side surfaces of the barrier 300_5 having a reverse tapered shape.

12 is a schematic cross-sectional view of a display device according to embodiments of the present invention.

FIG. 13 is a plan view illustrating an example of a light blocking layer included in the light source assembly of the display device of FIG. 10 .

FIG. 14 is a plan view illustrating another example of a light blocking layer included in the light source assembly of the display device of FIG. 10 .

In Figures 12 to 14, in order to avoid redundant description, different points from the above-described embodiment are mainly described, and parts not specifically described follow the above-described embodiment, the same number refers to the same component, and similar number represents a similar component.

Referring to FIG. 12 , a display device 1000_1 according to embodiments of the present invention includes an accommodating portion RCP, a light source assembly LSA_10 disposed on a lower surface of the accommodating portion RCP, and a light source assembly LSA_10 on It may include a display panel (DP) disposed on, and a sensor layer (SSL) disposed on the display panel (DP).

In one embodiment, the light source assembly LSA_10 may further include a light blocking layer LBL.

The light blocking layer LBL may be disposed on the first light source 100 , the second light source 200 , and the barrier 300 . In various embodiments of the present disclosure, the light blocking layer LBL may include a plurality of openings OP1 and OP2. The light blocking layer LBL blocks some of the light (eg, first light and second light) incident from the first light source 100 and the second light source 200 and transmits the remaining light in the third direction DR3. You can make it go sideways. For example, the light blocking layer LBL may constitute an optical system for selectively transmitting only some light and blocking the remaining light.

For example, further referring to FIGS. 6A, 6E, 13, and 14 , the first openings OP1 of the light blocking layers LBL and LBL_1 may be disposed to overlap the first light sources 100 and 100_1. (For example, the first light source 100 shown in FIG. 6A and the first opening OP1 shown in FIG. 13 are disposed to overlap or the first light source 100_1 shown in FIG. 6E and the first opening OP1 shown in FIG. 14 The second opening OP2 may be disposed to overlap with the second opening OP2), and the second opening OP2 may be disposed to overlap with the second light source 200_1 (for example, with the second light source 200 shown in FIG. 6A). The second opening OP2 shown in FIG. 13 is arranged to overlap or the second light source 200_1 shown in FIG. 6E and the second opening OP2 shown in FIG. 14 are arranged to overlap).

Accordingly, the light blocking layer LBL allows the first light emitted from the first light source 100 to travel in the third direction DR3 through the first opening OP1, and allows the first light emitted from the second light source 200 to travel in the third direction DR3. The second light may travel in the third direction DR3 through the second opening OP2 . In this case, since the light blocking layer LBL blocks the path of light in an area other than the first opening OP1 and the second opening OP2, only the first light propagates through the first opening OP1 and the second opening ( By controlling only the second light to propagate through OP2), between the first light in the visible light wavelength range for image display and the second light in the infrared wavelength range for detecting an external input (eg, sensing a user's input) interference can be minimized. Accordingly, not only image quality can be improved, but also external input sensing performance can be improved.

As described above, the light source assembly and the display device including the light source assembly according to embodiments of the present invention include a first light source emitting first light (visible light) for displaying an image and a second light source for detecting an external input ( By including a barrier disposed between the second light sources that emit infrared light), display image quality and external input sensing performance may be improved.

In addition, the light source assembly and the display device including the light source assembly according to embodiments of the present invention include a light blocking layer disposed above the first light source and the second light source and defining an opening, thereby improving display image quality and simultaneously inputting external input. The performance of detection can be improved.

A light source assembly according to various embodiments of the present disclosure can be described as follows.

In order to solve the above problems, a light source assembly according to embodiments of the present invention includes a base layer, a first light source disposed on the base layer and emitting a first light having a first wavelength range, the A second light source disposed on the base layer and emitting second light having a second wavelength range different from the first wavelength range, and disposed on the base layer, between the first light source and the second light source A barrier may be included.

In one embodiment, the barrier may have a reverse taper shape.

In one embodiment, when viewed on a plane, the barrier may be disposed in a shape surrounding the second light source.

In one embodiment, the light source assembly may further include a reflective layer covering the barrier.

In an embodiment, the light source assembly may further include a light blocking layer disposed on the first light source, the second light source, and the barrier and including at least one opening at least partially open. there is.

In one embodiment, the at least one opening may include a first opening overlapping the first light source and a second opening overlapping the second light source.

In one embodiment, the first wavelength range may have a wavelength range of visible light, and the second wavelength range may have a wavelength range of infrared light.

A display device according to various embodiments of the present invention can be described as follows.

In order to solve the above problems, a display device according to embodiments of the present invention is disposed on a light source assembly, the light source assembly, and displays an image using the first light provided from the light source assembly. and a sensor layer disposed on the display panel and including at least one sensor for detecting an external input using the second light provided from the light source assembly. The light source assembly includes a base layer, a first light source disposed on the base layer and emitting the first light having a first wavelength range, and a second light source disposed on the base layer and different from the first wavelength range. It may include a second light source for emitting the second light having a wavelength range, and a barrier disposed on the base layer and disposed between the first light source and the second light source.

Although the above has been described with reference to the embodiments of the present invention, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the present invention described in the claims. You will be able to.

100: first light source
200: second light source
300: barrier
400: reflective layer
1000: display device
BSL: base layer
DCP: driving circuit
DP: display panel
LBL: light blocking layer
LSA: Light Source Assembly
IRSS: light receiving element
OP1, OP2: Opening
PDP: panel driving unit
RCP: receptacle
SSB: sensor board
SSL: sensor layer
TDP: input detector
TSP: input detection panel

Claims (8)

base layer;
a first light source disposed on the base layer and emitting a first light having a first wavelength range;
a second light source disposed on the base layer and emitting second light having a second wavelength range different from the first wavelength range; and
It is disposed on the base layer and includes a barrier disposed between the first light source and the second light source,
The barrier is
A light source assembly having a reverse taper shape in which an area becomes narrower from a lower portion where the first light source and the second light source are disposed to an upper portion. delete The light source assembly of claim 1 , wherein the barrier is disposed in a shape surrounding the second light source when viewed from a plane. According to claim 1,
Further comprising a reflective layer covering the barrier, the light source assembly. According to claim 1,
The light source assembly further comprising a light blocking layer disposed on the first light source, the second light source, and the barrier and including at least one opening at least partially open. The light source assembly of claim 5 , wherein the at least one opening includes a first opening overlapping the first light source and a second opening overlapping the second light source. The light source assembly of claim 1 , wherein the first wavelength range has a wavelength range of visible light, and the second wavelength range has a wavelength range of infrared light. light source assembly;
a display panel disposed on the light source assembly and displaying an image using first light provided from the light source assembly; and
A sensor layer disposed on the display panel and including at least one sensor for detecting an external input using second light provided from the light source assembly;
The light source assembly,
base layer;
a first light source disposed on the base layer and emitting the first light having a first wavelength range;
a second light source disposed on the base layer and emitting the second light having a second wavelength range different from the first wavelength range; and
It is disposed on the base layer and includes a barrier disposed between the first light source and the second light source,
The barrier is
A display device having a reverse taper shape in which an area becomes narrower from a lower portion where the first light source and the second light source are disposed to an upper portion.

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