DISPLAY DEVICE

Abstract

An embodiment discloses a display device (10) comprising a backlight unit (300), a display panel (100) arranged on the backlight unit (300) and having a first display area (DA1) and a second display area (DA2), and a first sensor (CM1) and a second sensor (CM2) arranged below the display panel (100), wherein the backlight unit (300) comprises a light guide plate (320) having a first light guide portion (320a) arranged below the first display area (DA1) and a second light guide portion (320b) arranged below the second display area (DA2), a light source (310) configured to radiate light onto the light guide plate (320), and a first reflector (340) arranged on the second light guide portion (320b),and wherein the first reflector (340) transmits light emitted by the first sensor (CM1) and reflects light emitted by the second sensor (CM2).

Description

1. Technical area

[0001] The embodiments relate to a display device. 2. Discussion of related technology

[0002] With the development of information society, the demand for display devices for displaying images in various types is increasing, and recently various display devices such as liquid crystal display devices (LCD), plasma display panels (PDP) and organic light emitting display devices (OLED) have been used.

[0003] Recently, the multimedia capabilities of electronic devices such as mobile devices have improved. For example, cameras are integrated into mobile devices as a basic feature, and camera resolutions are rising to the level of conventional digital cameras. However, a front-facing camera on a mobile device limits the screen design, making screen design difficult. To reduce the space occupied by the camera, screen designs with a notch or hole have been adopted for mobile devices, but the screen size is still limited due to the camera, making it difficult to implement a full-screen display.

[0004] In order to realize the full-screen display, a method of providing an image pickup area having low-resolution pixels in a screen of a display panel and arranging a camera and / or various sensors in the image pickup area has been proposed. BRIEF EXPLANATION

[0005] One aspect of the present disclosure is directed to providing a display device in which an image pickup area is not visible from the outside.

[0006] Furthermore, another aspect of the present disclosure is directed to providing a display device having an improved dark area phenomenon by a first reflector and a second reflector while maintaining the performance of a camera.

[0007] Moreover, another aspect of the present disclosure is directed to providing a display device with increased transmittance by improving a structure of a display panel and a pixel aperture ratio.

[0008] The advantages of the present disclosure are not limited thereto and may also include advantages or effects that may result from the configurations or embodiments to be described below. According to one aspect of the present disclosure, a display device according to claim 1 is provided. Further embodiments are described in the dependent claims.

[0009] A display device according to at least one embodiment of the present disclosure may include a backlight unit, a display panel disposed on the backlight unit and having a first display area and a second display area, and a first sensor and a second sensor disposed below the display panel. The backlight unit may include a light guide plate having a first light guide portion disposed below the first display area and a second light guide portion disposed below the second display area, a light source configured to irradiate light onto the light guide plate, and a first reflector disposed on the second light guide portion. The first reflector may transmit light emitted from the first sensor and reflect light emitted from the second sensor.

[0010] The light emitted by the first sensor can be emitted outward through the display panel, reflected by an external object, and received by the first sensor.

[0011] The light source is arranged on one side of the light guide plate, and the light guide plate may have an inclined surface arranged on the other side opposite to the one side, and the first reflector may be arranged on the inclined surface.

[0012] The inclined surface cannot overlap an upper surface of the light guide plate.

[0013] A thickness of the light guide plate may decrease along the inclined surface towards the other side.

[0014] The display device may further comprise a first light transmission element arranged between the inclined surface of the light guide plate and the display panel.

[0015] The first light transmission element may be arranged between a second light emission unit of the second sensor and the first reflector.

[0016] The first sensor may include a first light emitting unit and an infrared camera, and the second sensor may include a second light emitting unit and an RGB camera.

[0017] The display device may further comprise a first substrate on which the first sensor is arranged and a second substrate on which the second sensor is arranged.

[0018] The first substrate and the second substrate may be arranged to intersect each other.

[0019] The second light emitting unit may be adjacent to the infrared camera and the first light emitting unit may be adjacent to the RGB camera.

[0020] The first sensor and the second sensor can emit light in intersecting directions.

[0021] The first substrate and the second substrate may be arranged parallel to each other, and the first substrate and the second substrate may be adjacent to each other in a first direction toward a side portion or in a second direction perpendicular to the first direction.

[0022] The first sensor and the second sensor may at least partially overlap in the first direction.

[0023] The display device may further comprise a first light transmission element arranged between the inclined surface of the light guide plate and the display panel, and a second reflector arranged on the inclined surface of the first light transmission element, wherein the second reflector can reflect the light emitted from the second sensor onto the display panel.

[0024] The display device may further comprise a second light transmission element arranged on the inclined surface of the first light transmission element, wherein the second reflector is arranged between the second light transmission element and the first light transmission element.

[0025] An opening area of a first pixel of the first display area may have an area different from an opening area of a second pixel of the second display area.

[0026] A second pixel of the second display area may include a 2-1 pixel that outputs red, green, and blue light and a 2-2 pixel that outputs white light.

[0027] An area of the 2-1 pixel can be smaller than an area of the 2-2 pixel.

[0028] The backlight unit may further include an optical plate disposed between the light guide plate and the display panel, wherein the optical plate may have an opening corresponding to the second display area.

[0029] The light source may be arranged on one side of the light guide plate, and the first reflector may be arranged on the other side facing the one side of the light guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other advantages, features and benefits of the present disclosure will become more apparent to those skilled in the art by describing in detail exemplary embodiments with reference to the accompanying drawings, in which: Fig. 1 is a perspective view of a display device according to an embodiment of the present disclosure; Fig. 2A is an exploded perspective view of the display device according to the present disclosure variant; Fig. 2B is a schematic view of the display device according to the present embodiment of the disclosure; Fig. 3 is a cross-sectional view of a display device according to a first embodiment of the present disclosure; Fig. 4 is a view for describing a cross section and a function of a first reflector in the display device according to the embodiment of the present disclosure; Fig. 5 is a flowchart showing an operation method of the display device according to the present embodiment; Fig. 6 a first modified example of Fig. 3 is; Fig. 7 a second modified example of Fig. 3 is; Fig. 8 a third modified example of Fig. 3 is; Fig. 9 is a cross-sectional view of a display device according to a second embodiment of the present disclosure; Fig. 10 a modified example of Fig. 9 is; Fig. 11 is a view showing a layer structure between a light guide plate and a first light transmission element and various layer structures between the first light transmission element and a second light transmission element; Fig. 12 a modified example of Fig. 9 and is a cross-sectional view along the line II'; Fig. 13 a modified example of Fig. 9 and is a cross-sectional view along the line II-II'; Fig. 14 is a view showing a second display area according to various examples of the display device according to the second embodiment; Fig. 15 is a first usage example of a first sensor and a second sensor in the display device according to the embodiment; Fig. 16 a side view of Fig. 15 is; Fig. 17 a plan view of Fig. 15 is; Fig. 18 is a view for describing effects of the first usage example of the first sensor and the second sensor in the display device according to the embodiment; Fig. 19 is a second usage example of the first sensor and the second sensor in the display device according to the embodiment; Fig. 20 a side view of Fig. 19 is; Fig. 21 a plan view of Fig. 19 is; Fig. 22 a modified example of Fig. 15 is; Fig. 23 a side view of Fig. 22 is; Fig. 24 a plan view of Fig. 22 is; Fig. 25 shows various examples of a pixel structure of a display panel in the display device according to the embodiment; Fig. 26 shows various examples of the display panel and a polarizing plate in the display device according to various experimental examples; Fig. 27 a set of recorded images according to different test examples of Fig. 26 is; Fig. 28 is a view showing various pixel structures having different aperture ratios in a second display area in the display device; Fig. 29 is a cross-sectional view of the display device having pixels with different aperture ratios according to the embodiment; and Fig. 30 a set of video images according to the different pixel structures of Fig. 28 is. DETAILED DESCRIPTION OF THE EXEMPLARY DESIGNS

[0031] Hereinafter, exemplary embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0032] However, the technical idea of the present disclosure is not limited to the some of the described embodiments, but can be implemented in various different forms, and one or more of the components among the embodiments can be used by selective coupling or substitution without departing from the scope of the technical idea of the present disclosure.

[0033] In addition, terms (including technical and scientific terms) used in embodiments of the present disclosure may be interpreted to be generally understood by those skilled in the art to which the present disclosure relates unless expressly defined and described, and the meanings of the commonly used terms, such as terms defined in a dictionary, may be interpreted taking into account the contextual meanings of related technologies.

[0034] Furthermore, the terms used in the embodiments of the present disclosure are for the purpose of describing the embodiments and are not intended to limit the present disclosure.

[0035] In the description, a singular form may include a plural form unless the wording indicates otherwise, and the wording "at least one (or one or more) of A, B and C" may include one or more of all possible combinations of A, B and C.

[0036] Furthermore, terms such as first, second, A, B, (a) and (b) may be used to describe components of the embodiments of the present disclosure.

[0037] These terms are used only to distinguish one component from another, and the type, sequence, order, or the like of the corresponding components is not limited by these terms.

[0038] When a first component is referred to as being "connected", "coupled", or "joined" to a second component, this may include a case where the first component is directly connected, coupled, or joined to the second component, but also a case where the first component is "connected", "coupled", or "joined" to the second component through other components that are located between the first and second components.

[0039] Furthermore, when a particular component is described as being formed or arranged "on top of" or "below" another component, the terms "on top of" or "below" may include not only the case where two components are in direct contact with each other, but also the case where one or more other components are formed or arranged between the two components. Furthermore, the designation "on top of" or "below" may include not only an upward direction, but also a downward direction with respect to a component.

[0040] Fig. 1 is a perspective view of a display device according to an embodiment of the present disclosure.

[0041] According to Fig. 1, a display device 10 may include a display panel 100 for displaying images and a sensor CM for capturing images.

[0042] The display device 10 of the present embodiment can be used in various electronic devices such as smartphones, tablets, smart pads, televisions, and monitors. The display panel 100 may include a display area DA having a plurality of subpixels and a non-display area NDA located on at least one side of the display area DA. As illustrated, the non-display area NDA is located on a portion of the display panel 100, but is not limited thereto.

[0043] The display area DA may include a first display area DA1 and a second display area DA2. A plurality of pixels in the first display area DA1 may emit light, and images may be displayed by the emitted light. The second display area DA2 may overlap with the sensor CM. The second display area DA2 may include a detection area CA that overlaps with the sensor CM and a surrounding area SA adjacent to the detection area CA.

[0044] The sensor CM may be mounted below the display panel 100. The sensor CM may be spaced apart from the display panel 100. An area of the second display region DA2 is shaped to be larger than an area of the sensor CM, but is not limited thereto. For example, the second display region DA2 and the sensor CM may be formed to have substantially the same area, or the second display region DA2 may be formed to be smaller than the sensor CM.

[0045] Furthermore, the sensor CM is shaped to overlap with, but is not limited to, an upper region of the display area DA. The location of the sensor CM under the display panel 100 may vary depending on the electronic device to which the display device 10 is attached. For example, the sensor CM may overlap with an upper left region or an upper center region of the display area DA. Depending on the location of the sensor CM, the second display area DA2 may also be arranged in the upper left region or the upper center region.

[0046] Furthermore, the sensor CM can have a first sensor CM1 and a second sensor CM2. The first sensor CM1 can have a first light emitting unit and a first light receiving unit. The second sensor CM2 can have a second light emitting unit and a second light receiving unit. The first sensor CM1 and the second sensor CM2 can receive light in different wavelength ranges. Furthermore, the first light emitting unit and the second light emitting unit can emit light in different wavelength ranges. The light emitting unit can correspond to a "transmitting unit" and the light receiving unit can correspond to a "receiving unit."

[0047] Fig. 2A is an exploded perspective view of the display device according to the embodiment of the present disclosure. Fig. 2B is a schematic cross-sectional view of the display device according to the embodiment of the present disclosure.

[0048] With reference to Fig. 2A and Fig. 2B, the display device 10 according to the embodiment a may include a display panel 100, a backlight unit 300, and a housing member.

[0049] The display panel 100 may include a lower substrate 110, an upper substrate 120, and a liquid crystal layer 130 disposed between the lower substrate 110 and the upper substrate 120. The lower substrate 110 and the upper substrate 120 may be made of glass or plastic.

[0050] Signal lines and pixels may be provided on an upper surface of the lower substrate 110 of the display panel 100. The signal lines may include intersecting data lines and gate lines, a common line for supplying a common voltage to common electrodes, and gate control signal lines for supplying a control signal to a gate drive circuit. The pixels may be arranged in the intersection regions of the data lines and gate lines. Each of the pixels may include a thin-film transistor (TFT), a pixel electrode, and a common electrode. The thin-film transistor may provide a data voltage to the data line of the pixel electrode in response to a gate signal of the gate line.

[0051] A liquid crystal of the liquid crystal layer 130 can be driven by an electric field generated by a potential difference between the data voltage applied to the pixel electrode and the common voltage applied to the common electrode, thereby adjusting the transmittance of the light incident from the backlight unit 300.

[0052] A black matrix and a color filter may be provided on a lower surface of the upper substrate 120 of the display panel 100. The lower surface of the upper substrate 120 may be a surface facing the lower substrate 110. As described below, the display panel 100 may have a flip-type structure in which the black matrix and the color filter are arranged on the upper substrate 120.

[0053] Furthermore, the common electrode may be provided on the lower surface of the upper substrate 120 in a vertical electric field driving method such as a twisted nematic mode (TN mode) and a vertical alignment mode (VA mode), and on the upper surface of the lower substrate 110 in a horizontal electric field driving method such as an in-plane switching mode (IPS mode) and a fringe field switching mode (FFS mode).

[0054] Since the black matrix is formed of a light-blocking material in a matrix structure, light loss to an area other than a pixel area can be blocked.

[0055] The color filter can be located between the black matrices in the pixel area. The color filter can have a red color filter, a green color filter, and a blue color filter.

[0056] An upper polarizing plate 142 may be disposed on the upper substrate 120 of the display panel 100. Furthermore, a lower polarizing plate 141 may be disposed on the lower substrate 110 of the display panel 100. A light transmission axis of the upper polarizing plate 142 may intersect or be orthogonal to a light transmission axis of the lower polarizing plate. Furthermore, an alignment layer for adjusting a pretilt angle of the liquid crystal may be disposed on inner surfaces of the upper substrate 120 and the lower substrate 110 that are in contact with the liquid crystal.

[0057] The backlight unit 300 may include a light source 310, a light guide plate 320, a reflective plate RF, an optical plate 330, a first reflector 340, etc. The backlight unit 300 may convert the light emitted from the plurality of light sources 310 into uniform area light through the light guide plate 320 and the optical plate 330 and provide the light to the display panel 100. The backlight unit 300 is described as being implemented in an edge type, but is not limited thereto and may also be implemented in a direct type.

[0058] The light source 310 may be provided singly or in multiples. The light source 310 may be embodied as a light-emitting diode (LED). In this case, the light-emitting diode may emit light in various wavelength ranges. For example, the light-emitting diode may include at least one blue light-emitting diode that emits blue light, one red light-emitting diode that emits red light, and one magenta light-emitting diode that emits magenta light that is a mixture of blue and red light. The light emitted by the light-emitting diode may be converted into white light by a wavelength conversion layer (not shown) and incident on the light guide plate 320.

[0059] The light source 310 may be arranged on at least one side surface of the light guide plate 320 to radiate light onto the side surface of the light guide plate 320. The light source 310 may be mounted on a light source board and turned on and off by receiving a drive current from a light source drive circuit.

[0060] The light guide plate 320 can convert the light emitted from the light source 310 into area light and radiate the light onto the display panel 100. The reflective plate RF can be arranged on a lower surface of the light guide plate 320 to reflect the light directed downward from the light guide plate 320.

[0061] The light guide plate 320 may include a first light guide portion 320a and a second light guide portion 320b. The first light guide portion 320a may be disposed below the first display area DA1. The first light guide portion 320a may overlap the first display area DA1 in a stacking direction. The stacking direction (a Z-axis direction) may correspond to a direction from the light guide plate 320 toward the display panel 100. Furthermore, the second light guide portion 320b may be disposed below the second display area DA2. The second light guide portion 320b may overlap the second display area DA2 in the stacking direction.

[0062] The optical plate 330 may be disposed between the light guide plate 320 and the display panel 100. The optical plate 330 may include at least one prism plate or at least one diffusion plate. The optical plate 330 may scatter the light incident from the light guide plate 320 and refract an optical path so that the light is incident at an angle substantially perpendicular to a light incident surface of the display panel 100.

[0063] The first reflector 340 may be arranged inclined in the second display area DA2. Specifically, the first reflector 340 may be arranged inclined with respect to a direction (an X-axis direction) from the light source 310 toward the light guide plate. Furthermore, the first reflector 340 may be arranged inclined with respect to the upper surface and the lower surface of the light guide plate 320. For example, the first reflector 340 may be arranged on an inclined surface of the light guide plate 320. Furthermore, the first reflector 340 and the inclined surface of the light guide plate 320 may be arranged at a predetermined angle other than a right angle with respect to the upper surface and the lower surface of the light guide plate 320.

[0064] The first reflector 340 may be arranged between the first light guide portion 320a and the second light guide portion 320b. The light guide plate 320 may have an inclined portion CH1 that overlaps the second display area DA2 so that the first reflector 340 is arranged thereon. The inclined portion CH1 may be arranged, for example, at an edge of the light guide plate 320 or in a partial area of the light guide plate 320. The first reflector 340 may be arranged, for example, at the edge of the light guide plate 320.

[0065] The first reflector 340 may be disposed on the inclined portion CH1 with an inclined surface SS1. The first reflector 340 may have an inclined surface that is not perpendicular to the direction (the X-axis direction) from the light source 310 to the light guide plate 320. Furthermore, a reflecting surface of the first reflector 340 may form a predetermined angle by intersecting the direction from the light source 310 to the light guide plate 320.

[0066] Corresponding to the inclined surface SS1 and the first reflector 340, the optical plate 330 may have an opening 331 formed in the sensor or the second display surface DA2. With this configuration, the luminance of the light incident under the second display surface DA2 can be increased. However, the present disclosure is not necessarily limited to this, and the opening of the optical plate 330 may be omitted.

[0067] The sensor CM may include a first sensor CM1 and a second sensor CM2. The first sensor CM1 may include a first light emitting unit Tx1 and a first light receiving unit Rx1. The second sensor CM2 may include a second light emitting unit Tx2 and a second light receiving unit Rx2. Furthermore, the second sensor CM2 may include only the second light emitting unit Tx2. Since the light emitted by the second light emitting unit Tx2 is provided to the display panel, a dark area of the second display area DA2 can be reduced.

[0068] The first sensor CM1 and the second sensor CM2 may also be referred to as a "camera module," "camera sensor," "camera unit," etc. The first sensor CM1 may, for example, be an infrared camera. Alternatively, the first sensor CM1 may also be an infrared sensor (IR sensor). The second sensor CM2 may be an RGB sensor or an RGB camera.

[0069] The first light emitting unit of the first sensor CM1 can emit infrared (IR) rays. The first light receiving unit can receive reflected light of the emitted infrared ray reflected by an object (e.g., a person, etc.). Therefore, the first sensor CM1 can adjust the amount of light depending on the intended use or the distance to the user. The amount of light emitted by the first sensor CM1 can have an optimal amount of light depending on the intended use or the distance to the user. According to various embodiments, the first sensor CM1 can be operated with a preset optimal amount of light corresponding to the intended use or the distance to the user.

[0070] Furthermore, the first sensor CM1 can extract features of an object. According to various embodiments, the first sensor CM1 can generate image data, etc., that can recognize that the object is the user's face when the object is the user's face by receiving the reflected light. Furthermore, the first sensor CM1 can generate data distinguishing a direction of a face and a position of the face. For example, the first sensor CM1 can generate or extract data to identify the shape of the face and determine the position of the eyes, nose, mouth, forehead, etc. of the face. Furthermore, the detection of the object, extraction, and generation of data, etc., can be performed in a display device or an electronic device provided with the first sensor CM1, rather than by the first sensor CM1.In the above description, the subject was described as the user's face, but is not limited to this. Furthermore, the sensor CM can extract not only the features of the subject, but also heart rate, iris information, etc., and various other subject information. Furthermore, the second sensor CM2 is an RGB camera and can receive RGB image data.

[0071] The housing member may include a bottom cover 410, a support frame, and a top cover 420.

[0072] The bottom cover 410 may include a structure that surrounds the backlight unit 300 or the display panel 100. For example, the bottom cover 410 may be a square frame. Furthermore, the bottom cover 410 may be made of various materials. For example, the bottom cover 410 may be made of metal. This may improve the reliability of the display device.

[0073] The top cover 420 may enclose an edge of the display panel 100, a top surface and side surfaces of the support frame, and side surfaces of the bottom cover 410. However, the sizes of the top cover and the bottom cover may be changed in various ways.

[0074] Furthermore, the top cover 420 may be made of electronically galvanized iron (EGI), stainless steel, or the like. The top cover 420 may be attached to the support frame with hooks or screws. Furthermore, a buffer member may be disposed between the top substrate and the top cover. Thus, the top substrate of the display panel 100 may be protected from impact by the top cover 420.

[0075] Fig. 3 is a cross-sectional view of a display device according to a first embodiment of the present disclosure. Fig. 4 is a view for describing a cross section and a function of a first reflector in the display device according to the present embodiment of the disclosure. Fig. 5 is a flowchart showing an operation method of the display device according to the embodiment of the present disclosure. Fig. 6 is a first modified example of Fig. 3. Fig. 7 is a second modified example of Fig. 3. Fig. 8 is a third modified example of Fig. 3.

[0076] With reference to Fig. 3, as described above, the light guide plate 320 may have an upper surface US1, a lower surface BS1, and an inclined surface SS1. For example, the upper surface US1 and the lower surface BS1 may be flat surfaces opposite each other in the stacking direction.

[0077] In the light guide plate 320, the upper surface US1 and the lower surface BS1 may be spaced apart and connected by side surfaces and the inclined surface SS1. The inclined surface SS1 may be disposed in a partial area of the light guide plate 320. Furthermore, the inclined surface SS1 may be disposed within the light guide plate 320 or the edge of the light guide plate 320 and may be disposed between the upper surface US1 and the lower surface BS1, or outside the upper surface US1 or the lower surface BS1 of the light guide plate 320.

[0078] The inclined surface SS1 may be disposed on the second light guide portion 320b. Furthermore, the inclined surface SS1 may be disposed below the second display area DA2. Furthermore, the inclined surface SS1 may be a surface inclined at a predetermined angle with respect to the upper surface US1 and the lower surface BS1. The inclined surface SS1 should not overlap with the upper surface US1 of the light guide plate.

[0079] The inclined surface SS1 may be arranged on the light guide plate 320, in particular on a light counter portion or a backlight incident portion which is opposite to a light incident portion facing the light source 310.

[0080] Therefore, the first reflector 340 on the inclined surface SS1 can slightly reduce the dark area generated by the first sensor CM1 by reflecting visible light incident on the light counterpart portion. In the embodiment, the first reflector 340 can reflect the light emitted by the light source 310 and the second sensor CM2.

[0081] The first reflector 340 may be in contact with the light guide plate 320 or the second light guide portion 320b. In particular, the first reflector 340 may be arranged above the inclined surface SS1. For example, the first reflector 340 may be in contact with the inclined surface SS1. Furthermore, a first adhesive member AD1 may be arranged between the first reflector 340 and the inclined surface SS1. The first adhesive member AD1 may bond the first reflector 340 to the inclined surface SS1. This can increase the adhesive strength between the first reflector 340 and the light guide plate 320.

[0082] Furthermore, the inclined surface SS1 may be arranged between the first reflector 340 and the first sensor CM1. Furthermore, an air gap may be formed between the second light guide portion 320b and the first sensor CM1.

[0083] The first reflector 340 may be referred to as a "filter" or a "first reflective element." The first reflector 340 may be configured to reflect light in a visible wavelength range and transmit light in an infrared wavelength range. The first reflector 340 may be, for example, a dichroic filter, but is not limited thereto, and various types of filters may be used without limitation.

[0084] Furthermore, the inclined surface SS1 can have various optical patterns for diffusion. Therefore, the light reflected by the first reflector 340 provided on the inclined surface SS1 can be diffused toward the display panel 100. Therefore, the dark area in the second display area can be reduced, and the occurrence of a bright line, etc. due to the reflected light can be suppressed. That is, the light uniformity can be improved.

[0085] With reference to Fig. 4, the first reflector 340 may include a light-transmitting substrate 341 and a plurality of layers 342. The light-transmitting substrate 341 may be made of a light-transmitting material such as glass, for example.

[0086] Furthermore, the plurality of layers 342 may be disposed on the light-transmissive substrate 341. For example, the plurality of layers 342 may include a first layer L1 and a second layer L2. The first layer L1 may be disposed between the second layer L2 and the light-transmissive substrate 341. Furthermore, the first layer L1 and the second layer L2 may be formed from materials with different refractive indices.

[0087] For example, the first layer L1 may have a high refractive index characteristic compared to the second layer L2. Furthermore, the second layer L2 may have a low refractive index characteristic compared to the first layer L1. That is, the first layer L1 may be a high refractive index layer, and the second layer L2 may be a low refractive index layer.

[0088] In this case, the first layer L1 and the second layer L2 may have predetermined refractive indices corresponding to the desired wavelengths of light for transmission and reflection. Furthermore, each of the first layer L1 and the second layer L2 may be formed of multiple layers instead of a single layer, and the plurality of first layers L1 and the plurality of second layers L2 may be alternately stacked.

[0089] The reflected light RL relative to the incident light IL across the entire wavelength range can be light in the visible wavelength range. Furthermore, the transmitted light TL can be light in the infrared wavelength range.

[0090] Referring again to Fig. 3, the first reflector 340 can reflect light LG1 and LG4 in the visible wavelength range. The first reflector 340 can reflect the light LG1 emitted by the first light guide section 320a downward and the light LG4 emitted by the second sensor CM2 upward.

[0091] In particular, the second light-emitting unit TX2 of the second sensor CM2 may perform the same or substantially the same function as the light source. For example, the second light-emitting unit TX2 of the second sensor CM2 may emit light in the visible wavelength range. The first reflector 340 may reflect the light LG4 emitted by the second light-emitting unit upward or onto the display panel 100. Furthermore, visible light reflected by external light or an object may be reflected by the first reflector 340 and provided to the second sensor CM2.

[0092] According to the embodiment, since the light LG4 emitted by the second light-emitting unit is emitted to the second display area DA2, the dark area generated in the second display area DA2 can be reduced. Furthermore, when the light amount of the second light-emitting unit is controlled by the second sensor CM2, the occurrence of a bright line, etc., can be suppressed, or the light uniformity between the first display area DA1 and the second display area DA2 can be improved.

[0093] The first reflector 340 can transmit the light emitted by the first sensor CM1. For example, the first reflector 340 can transmit the light LG2 and LG3 in the infrared wavelength band. Therefore, among the light LG2 emitted by the first light emitting unit of the first sensor CM1, the light L3 reflected by an external object or item can be provided to the first light receiving unit.

[0094] Furthermore, the first reflector 340 may be arranged to face the light source located on one side of the light guide plate 320 in accordance with the position of the inclined surface SS1. For example, the first reflector 340 may be arranged on the other side of the light guide plate 320. In the embodiments of the present disclosure, one side of the light guide plate 320 may correspond to the light incident portion adjacent to the light source, and the other side of the light guide plate 320 may correspond to the opposite light portion or the opposite light incident portion. In other words, the first reflector 340 may be arranged closer to the opposite light portion or the opposite light incident portion than to the light incident portion.

[0095] Furthermore, the upper surface US1 of the light guide plate 320 may be arranged near the optical plate 330. For example, the upper surface US1 of the light guide plate 320 may be arranged closer to the optical plate 330 than the lower surface BS1. Furthermore, the optical plate 330 may be arranged on the upper surface of the light guide plate 320. Furthermore, the upper surface US1 of the light guide plate 320 may be arranged closer to the display panel 100 than the lower surface BS1. Furthermore, the optical plate 330 may be arranged on at least a portion of the upper surface US1.

[0096] The optical plate 330 may not be disposed in a region of the upper surface US1 that overlaps the first sensor CM1. That is, the optical plate 330 may not overlap the first sensor CM1. However, as described above, the optical plate 330 does not need to have an opening and may at least partially overlap the first sensor CM1 or the second light guide portion 320b in the stacking direction.

[0097] The lower surface BS1 of the light guide plate 320 may be disposed adjacent to the lower cover 410. The lower surface BS1 of the light guide plate 320 may be disposed closer to the lower cover 410 than the upper surface US1. Furthermore, a first reflective plate RF1 may be disposed on the lower surface BS1 of the light guide plate 320.

[0098] The first reflective plate RF1 can reflect the light directed downward from the light guide plate 320 into the light guide plate 320. The first reflective plate RF1 can not overlap the inclined surface SS1. That is, the first reflective plate RF1 can be arranged so that it is not aligned with the inclined surface SS1 in the stacking direction.

[0099] Therefore, the first reflective plate RF1 may also be arranged so that it is not aligned with the first sensor CM1, which overlaps the inclined surface SS1 in the stacking direction. In other words, the first reflective plate RF1 may be arranged at a distance from the first sensor CM1. The first reflective plate RF1 may correspond to the "reflective plate" described above.

[0100] The inclined surface SS1 may be connected to the upper surface US1 and the lower surface BS1. For example, the inclined surface SS1 may be arranged between the upper surface US1 and the lower surface BS1. Furthermore, the inclined surface SS1 may correspond to the chamfered portion of the light guide plate 320.

[0101] The inclined surface SS1 of the light guide plate 320 may not overlap the upper surface US1 in the stacking direction. Furthermore, as described above, the light guide plate 320 may have a protruding portion PR that extends further downward than the first light guide portion 320a or the lower surface BS1. Furthermore, the inclined surface SS1 may be disposed in the protruding portion PR.

[0102] According to the embodiment, a thickness d1 of the light guide plate 320 below the first display area DA1 can be reduced by the protruding portion PR, thereby miniaturizing the display device. Furthermore, even when an incident area of the first reflector 340 increases corresponding to a viewing angle of the first sensor CM1, the thickness of the light guide plate 320 can be reduced or prevented from increasing by the protruding portion PR. That is, since the light guide plate 320 has the protruding portion PR in a partial area, the light guide plate 320 can remain lightweight and miniaturized despite a change in the incident angle of the first reflector 340.

[0103] The lower cover 410 may include a base portion 411 and a protruding portion 412. The protruding portion 412 may be disposed in a region of the lower cover 410 and may be a portion extending downward from the base portion 411. For example, the first sensor CM1 and the second sensor CM2 may be housed in the protruding portion 412. An accommodation space for the first sensor CM1 and the second sensor CM2 can be easily ensured by the protruding portion 412. The protruding portion 412 may be disposed at the edge of the base portion 411 or within the base portion 411. The protruding portion 412 may be surrounded by the base portion 411. For example, the protruding portion 412 may be located within the edge of the base portion 411.The position of the protruding portion 412 can be adjusted in various ways corresponding to the positions of the first sensor CM1 and the second sensor CM2.

[0104] Corresponding to the above-described protruding portion 412, the light guide plate 320 may have the protruding portion PR extending downward. Therefore, a thickness d2 or the maximum thickness of the light guide plate 320 at the inclined surface SS1 may be larger than the thickness d1 of the light guide plate 320 at the bottom surface BS1 (or in the first display area).

[0105] Below the second display area DA2, the inclined surface SS1 may be arranged in the protruding area PR.

[0106] Corresponding to the protruding portion PR, the light guide plate 320 may have an extension surface PS1 extending downward from the bottom surface BS1. The thickness of the light guide plate 320 may be increased by the extension surface PS1.

[0107] The closer the inclined surface SS1 is to the second sensor CM2, the shorter the separation distance from the first sensor CM1 can be. Furthermore, the thickness d2 of the light guide plate 320 can be reduced as the light guide plate 320 is closer to the second sensor CM2 below the inclined surface SS1. According to the inclined structure of the inclined surface SS1, the first reflector 340 disposed on the inclined surface SS1 can reflect the light LG1 emitted from the light source downward toward the first sensor CM1.

[0108] The first light transmission element PR1 may be arranged on the first reflector 340. The first light transmission element PR1 may overlap the inclined surface SS1 in the stacking direction. Furthermore, the first light transmission element PR1 may be arranged on the other side of the light guide plate 320.

[0109] For example, the first light transmission element PR1 may be disposed between the light guide plate 320 and a support frame G. Furthermore, the first light transmission element PR1 may be disposed between the first reflector 340 and the second sensor CM2. The first light transmission element PR1 may be disposed between the first reflector 340 and the display panel 100. Furthermore, the first light transmission element PR1 may be disposed between the inclined surface SS1 and the display panel 100. Furthermore, the first light transmission element PR1 may be disposed between the second light emitting unit of the second sensor and the first reflector 340. Therefore, it is possible to prevent foreign matter, etc., from entering the first reflector 340, through which light of infrared wavelength is transmitted and reflected by light of visible wavelength.As a result, improved detection sensitivity can be maintained and the dark areas can be slightly reduced.

[0110] The support frame G may be disposed at an end portion of the light guide plate 320. The support frame G may surround the light guide plate 320, etc., as described above. Furthermore, the support frame G may be connected to the lower cover 410 (or the upper cover) by a fastener. Alternatively, the support frame G may be connected to the lower cover 410 by various connecting structures (e.g., bushings, etc.). For example, the lower cover 410 may penetrate at least a portion of the support frame G.

[0111] Furthermore, a second adhesive element AD2 may be arranged between the support frame G and the display panel 100. In particular, the second adhesive element AD2 may overlap with the non-display area of the display panel 100. The second adhesive element AD2 may, for example, be in the form of a tape.

[0112] A second reflective plate (not shown) may further be arranged between the extension surface PS1 and an inner surface of the protruding portion 412 facing the extension surface PS1.

[0113] The protruding portion PR may be a separate member from the light guide plate 320. Therefore, in order to bond the protruding portion PR to the light guide plate 320, an additional adhesive member may be disposed between the protruding portion PR and the first light guide portion 320a.

[0114] The display device according to the embodiment may include a substrate SB provided with the first sensor CM1 and the second sensor CM2. The substrate SB may include a first substrate SB1 and a second substrate SB2. The first substrate SB1 and the second substrate SB2 may be configured in a separate, connected, or coupled structure. Furthermore, the first sensor CM1 may be disposed on the first substrate SB1. The second sensor CM2 may be disposed on the second substrate SB2. Furthermore, the substrate SB may be disposed inside or outside the lower cover 410. Alternatively, at least a portion of the substrate SB may overlap the lower cover 410 in the first direction (the X-axis direction).

[0115] The first substrate SB1 and the second substrate SB2 may be electrically connected to a sensor driver. Therefore, as described below, control signals of the first sensor CM1 and the second sensor CM2 may be applied to the first substrate SB1 and the second substrate SB2 depending on whether the sensor is driven (on / off).

[0116] The first substrate SB1 and the second substrate SB2 may be arranged to intersect each other. The second substrate SB2 may be arranged to have a predetermined angle with respect to the first substrate SB1. Furthermore, an upper surface of the second substrate SB2 and an upper surface of the first substrate SB1 may not be parallel to each other. For example, the second substrate SB2 may be arranged perpendicular to the first substrate SB1.

[0117] The first light-emitting unit TX1 of the first sensor CM1 and the second light-emitting unit TX2 of the second sensor CM2 may be misaligned with each other in the first direction (X-axis direction). In the embodiment, the first direction may correspond to a direction from the light source to the light guide plate 320. Furthermore, the first light-receiving unit RX1 of the first sensor CM1 may be misaligned with the second light-receiving unit RX2 of the second sensor CM2 in the first direction.

[0118] For example, the second light emitting unit TX2 may be arranged adjacent to the first light receiving unit RX1, which is an infrared camera. The first light emitting unit TX1 may be arranged adjacent to the second light receiving unit RX2, which is an RGB camera. Furthermore, the first sensor CM1 and the second sensor CM2 may emit light in intersecting directions. With this configuration, the light emitted by the first light emitting unit TX1 and the second light emitting unit TX2 may be incident on different surfaces of the first reflector 340. This can increase detection accuracy. Furthermore, the second sensor CM2 may be arranged between the first sensor CM1 and the end portion of the display panel 100. This can reduce or minimize the size of the second display area DA2. That is, a region where the dark area needs to be reduced can be made smaller.

[0119] In a modified example, the inclined surface SS1 may overlap not only the second display area DA2 that overlaps the first sensor CM1, but also an area that overlaps the backlight incident portion of the first display area DA1. For example, the inclined surface SS1 may extend over the entire backlight incident portion. That is, the inclined surface SS1 may have a different area than the area that overlaps the first sensor CM1. Furthermore, the inclined surface SS1 may overlap an area that overlaps the backlight incident portion of the first display area and the second display area. Therefore, the first reflector 340 may also be arranged over the entire backlight incident portion. That is, the first reflector 340 may also be arranged in an area other than the area that overlaps the first sensor CM1.Furthermore, the first reflector 340 can overlap the area that overlaps the backlight incident portion of the first display area and the second display area. With this configuration, even when the amount of light directed to the backlight incident portion is small, light can be reflected onto the display panel 100 by the first reflector 340. Therefore, the luminance can be uniform across the entire display panel.

[0120] With reference to Fig. 5, an operation method of the display device according to the embodiment may include determining whether the display device is operating (S11), determining whether a sensor is operating (S12), determining whether an auxiliary light source is operating (S13 and S14), and determining a light transmission mode of a liquid crystal layer (S15).

[0121] When determining whether the display device is operating (S11), it may be determined whether the display device is in a power-on state or a power-off state. For example, when the display device is powered, the operation of the display device according to the embodiment may begin.

[0122] Upon determining whether the sensor is operating (S12), a host may transmit an operating signal of the second sensor to a sensor controller. The sensor controller may control the operation of the first sensor and the second sensor. Based on the received operating signal, the second sensor may perform on / off operations.

[0123] Accordingly, when determining whether the auxiliary light source is operating (S13 and S14), it can be determined whether the second sensor is operating. The host can transmit a second light-emitting unit control signal synchronized with the second sensor operation signal to the sensor controller. Therefore, the sensor controller can determine whether the second light-emitting unit is operating (on / off) depending on the operation of the second sensor. For example, when the operation of the second sensor is on and operating in a recording mode, the operation of the second light-emitting unit (auxiliary light source) can be turned off. When the operation of the second sensor is turned off and the recording mode ends, the second light-emitting unit (auxiliary light source) can be turned on to eliminate the dark area of the second display area. In this case, the display device can perform a full-screen display.That is, the display device can display an image without a dark area even in the second display area during a period of a non-recording mode.

[0124] Determining the light transmission mode of the liquid crystal layer (S15) can be performed when the auxiliary light source is off. The host can transmit a signal synchronized with the operating signal of the second sensor to a panel driver. The panel driver can drive a panel according to the received control signal.

[0125] This means that when the second sensor is operating and the auxiliary light source is off, the panel driver can operate the liquid crystal layer in light-transmitting mode. Light-transmitting mode can be defined as operating the liquid crystal to improve or maximize the transmittance of the display panel. Light-transmitting mode is intended to improve or maximize the amount of light incident on an image sensor and can be distinguished from an operating mode in which the panel's transmittance is adjusted to produce an image.

[0126] The light transmission mode can only be operated in the second display area. When the second display area operates in light transmission mode, the first display area can operate in image display mode. Therefore, energy efficiency can be increased and image sensing can be performed accurately.

[0127] In the various embodiments, modifications, and application examples below, the contents described in the embodiments described in the present detailed description, etc., except for the contents described below, can be applied.

[0128] With reference to Fig. 6, the substrate SB in the present application example may include the first substrate SB1 and the second substrate SB2 as described above. The first substrate SB1 and the second substrate SB2 may be separate from each other. For example, the first substrate SB1 and the second substrate SB2 may be arranged to be spaced apart from each other in the first direction by a predetermined distance (gap).

[0129] The first substrate SB1 may be disposed inside or outside the protruding portion 412 of the bottom cover 410. For example, at least a portion of the first substrate SB1 may be disposed outside the protruding portion 412. Furthermore, the second substrate SB2 may be disposed inside or outside the protruding portion 412. For example, at least a portion of the second substrate SB2 may be disposed outside the protruding portion 412.

[0130] At least a portion of the lower cover 410 or the protruding portion 412 may be disposed between the first substrate SB1 and the light guide plate 320. Moreover, at least a portion of the lower cover 410 or the protruding portion 412 may be provided between the second substrate SB2 and the light guide plate 320. Therefore, a gap between the light guide plate 320 and the lower cover 410 can be reduced. Therefore, the thickness of the display device can be reduced.

[0131] Furthermore, movement of either the first substrate SB1 or the second substrate SB2 can be facilitated. For example, if movement of the first sensor CM1 on the first substrate SB1 or movement of the second sensor CM2 on the second substrate SB2 is required, alignment, etc., can be performed simply by moving each substrate. Furthermore, repairs due to misalignment can also be performed more easily.

[0132] With reference to Fig. 7, the substrate SB in the present application example may include the first substrate SB1 and the second substrate SB2 as described above. The first substrate SB1 and the second substrate SB2 may be formed separately or integrally.

[0133] The display device may include a flat layer AM arranged to cover the second sensor CM2 on the second substrate SB2. The flat layer AM may cover a portion of the side surfaces or an upper surface of the second sensor CM2. Accordingly, contact between the second sensor CM2 and the first light-transmitting element PR1 can be reduced or prevented, or the position can be easily adjusted. Furthermore, the light emitted from the second sensor CM2 can be efficiently incident on the first light-transmitting element PR1. Furthermore, the flat layer AM can protect the second sensor CM2 and the first light-transmitting element PR1 from external influences, thereby improving the reliability of the display device. Furthermore, heat generated by the second sensor CM2 can be easily dissipated to the outside, to the second substrate SB2, etc.

[0134] The display device may include a fourth adhesive member AD4 disposed between the first light guide portion 320a and the second light guide portion 320b. The thicknesses of the first light guide portion 320a and the second light guide portion 320b can be easily adjusted by the fourth adhesive member AD4. Furthermore, the manufacturing and assembly of the light guide plate can be performed easily.

[0135] With reference to Fig. 8, the substrate SB in the present application example may include the first substrate SB1 and the second substrate SB2 as described above. The first substrate SB1 and the second substrate SB2 may be formed separately or integrally.

[0136] In this case, the second light receiving unit RX2 may be arranged on the second substrate SB2 below the second display area DA2. Furthermore, the second light receiving unit RX2 may be arranged in a region between the first light emitting unit TX1 and the first light receiving unit RX1 on the first substrate SB1.

[0137] Furthermore, the second light-emitting unit TX2 or an auxiliary light source may be arranged in an area adjacent to the second display area DA2. The second light-emitting unit TX2 or the auxiliary light source may be arranged in a region of the backlight incident portion and supplied with power via a separate circuit. Therefore, light emitted from the second light-emitting unit TX2 in the backlight incident portion can be reflected onto the display panel 100 by the first reflector 340. Furthermore, external light or visible light reflected from an object can be provided back to the second light-receiving unit RX2. With this configuration, the reduction of the dark area and the improvement of light uniformity for the second display area DA2 can be achieved.

[0138] Fig. 9 is a cross-sectional view of a display device according to a second embodiment, Fig. 10 is a modified example of Fig. 9, (a) of Fig. 11 shows a layer structure between a light guide plate and a first light transmission element and (b) of Fig. 11 to (d) of Fig. 11 show different layer structures between the first light transmission element and a second light transmission element.

[0139] With reference to Fig. 9, the display device according to the second embodiment may include the display panel 100, the backlight unit 300, the sensor CM, and a housing member. In addition, the backlight unit 300 may further include a first light transmission element PR1, a second reflector 350, and a fifth adhesive member AD5. Furthermore, except for the contents described below, the contents described in other embodiments, etc., may be applied to the present embodiment.

[0140] In the present embodiment, the light guide plate 320 may have an inclined surface SS1 that overlaps the second display area DA2. Furthermore, the first reflector 340 may be disposed on the inclined surface SS1. Furthermore, the first light transmission element PR1 may be disposed on the inclined surface SS1 or the first reflector 340. At least portions of the first reflector 340, the first light transmission element PR1, and the second reflector 350 may overlap in the first direction.

[0141] Furthermore, the second reflector 350 may be disposed on the first light transmission element PR1. The second reflector 350 may be disposed on an inclined surface SS2 of the first light transmission element PR1. Therefore, the second reflector 350 may also be disposed inclined in the second display area DA2. Specifically, the second reflector 350 may be disposed inclined in the direction (in the first direction) toward the light guide plate from the light source 310. Furthermore, the second reflector 350 may be arranged parallel to the first reflector 340. In this configuration, the light reflected by the second reflector 350 may be provided to the first reflector 340, or the opposite optical path may be formed.

[0142] The second reflector 350, like the first reflector 340, can reflect light in the visible wavelength range. The second reflector 350 can be made of the same or a different material as the first reflector 340. For example, if the first reflector 340 is a filter, the second reflector 350 can include a mirror that provides reflection. The second reflector 350 can, for example, be a reflector made of a metal (e.g., silver (Ag)) with high light reflectivity.

[0143] The first sensor CM1 can be arranged below the first reflector 340. The first sensor CM1 can overlap the first reflector 340. The second sensor CM2 can be arranged below the second reflector 350. The second sensor CM2 can overlap with the second reflector 350.

[0144] With this configuration, the light emitted from the first sensor CM1 can pass through the first reflector 340, and the light reflected from an object can also pass through the first reflector 340 and be provided to the first sensor CM1.

[0145] Furthermore, the light emitted by the second sensor CM2 can be reflected by the second reflector 350 onto the first reflector 340, and then from the first reflector 340 onto the second display area (or display panel). Conversely, light reflected from the outside or from an object can be reflected by the first reflector 340 and the second reflector 350 to the second sensor CM2. Since detection is performed by the first sensor CM1 and the second sensor CM2, the dark area of the second display area DA2 can be reduced.

[0146] The fifth adhesive element AD5 may be disposed between the second reflector 350 and the inclined surface SS2 of the first light transmission element PR1. The fifth adhesive element AD5 may be disposed on the inclined surface SS2 of the first light transmission element PR1. Therefore, the second reflector 350 and the first light transmission element PR1 may be connected by the fifth adhesive element AD5.

[0147] The first substrate SB1 and the second substrate SB2 may be arranged parallel to each other. The first substrate SB1 and the second substrate SB2 may be arranged side by side in the first direction or in the second direction perpendicular to the first direction (or in the stacking direction). For example, the first substrate SB1 and the second substrate SB2 may have coplanar upper surfaces.

[0148] At least portions of the first sensor CM1 and the second sensor CM2 may overlap in the first direction. Furthermore, at least portions of the first sensor CM1 and the second sensor CM2 may overlap in the stacking direction and in the second direction perpendicular to the first direction. In the present embodiment, the first sensor CM1 and the second sensor CM2 may be arranged sequentially in the first direction, and the first substrate SB1 and the second substrate SB2 may also be arranged sequentially in the first direction. The first substrate SB1 and the second substrate SB2 may be configured as one substrate SB.

[0149] Therefore, the first sensor and the second sensor are both arranged on a substrate or on the same surface, allowing for easy assembly of the substrate and the sensor. Furthermore, the light can be concentrated in an area adjacent to an aperture or a non-display area outside the second display area and not emitted.

[0150] With reference to Fig. 10, the display device may further include a second light transmission element PR2. The second light transmission element PR2 may be disposed on the inclined surface SS1 of the first light transmission element PR1. Furthermore, the second reflector 350 may be disposed between the second light transmission element PR2 and the first light transmission element PR1. For example, the first reflector 340, the first light transmission element PR1, the second reflector 350, and the second light transmission element PR2 may overlap in the first direction.

[0151] The second light transmission element PR2 may be disposed above the inclined surface SS2 of the first light transmission element PR1 and the second reflector 350. Furthermore, the second light transmission element PR2 may have an inclined surface in contact with the second reflector 350. Furthermore, the second light transmission element PR2 may surround the second reflector 350. Furthermore, since a portion of the second light transmission element PR2 may be in contact with the lower cover 410, the light guide plate 320, the first reflector 340, the first light transmission element PR1, the second reflector 350, and the second light transmission element PR2 can be provided on the lower cover 410 with increased adhesive strength. Furthermore, it is possible to prevent foreign matter, etc., from entering the second reflector 350 through which infrared wavelength light is transmitted.Therefore, improved detection sensitivity can be maintained.

[0152] Fig. 11 is a view showing a layer structure between a light guide plate and a first light transmission element and various layer structures between the first light transmission element and a second light transmission element.

[0153] With reference to (a) of Fig. 11, a first intermediate layer IL1 and a second intermediate layer IL2 may be disposed on the inclined surface of the light guide plate as described above. The first intermediate layer IL1 may be a first adhesive member. The second intermediate layer IL2 may be a first reflector. Furthermore, an adhesive member identical to the first intermediate layer IL1 may be disposed on the second intermediate layer IL2. For example, the first intermediate layer IL1, the second intermediate layer IL2, and the first intermediate layer IL1 may be sequentially disposed between the inclined surface of the light guide plate and the first light transmission element PR1.

[0154] Before describing (b) of Fig. 11 to (d) of Fig. 11, a plurality of intermediate layers may be provided between the first light transmission element PR1 and the second light transmission element PR2 in the display device according to the embodiment. Among the plurality of intermediate layers, a layer corresponding to the "adhesive element" may be arranged adjacent to the first light transmission element PR1 or the second light transmission element PR2. Furthermore, one layer among the plurality of intermediate layers may correspond to the second reflector. Furthermore, another layer among the plurality of intermediate layers may be an absorbing layer. In this case, the layer corresponding to the second reflector may be arranged closer to the first light transmission element PR1 than the layer corresponding to the absorbing layer.

[0155] With reference to (b) of Fig. 11, a third intermediate layer IL3, a fourth intermediate layer IL4, and a fifth intermediate layer IL5 may be disposed between the first light transmission element PR1 and the second light transmission element PR2. The third intermediate layer IL3 may be in contact with the first light transmission element PR1. Furthermore, the fifth intermediate layer IL5 may be in contact with the second light transmission element PR2.

[0156] The third intermediate layer IL3 can be the second reflector. The fourth intermediate layer IL4 can be an absorbing layer. The fourth intermediate layer IL4 can, for example, be made of a material that absorbs light emitted by the second sensor. The fourth intermediate layer IL4 can be a black-coated layer. Furthermore, the fifth intermediate layer IL5 can be a fifth adhesive element. Therefore, the fifth intermediate layer IL5 can provide improved adhesion between the fourth intermediate layer IL4 and the second light-transmitting element PR2.

[0157] With reference to (c) of Fig. 11, a third intermediate layer IL3', a fourth intermediate layer IL4' and a fifth intermediate layer IL5' may be arranged between the first light transmission element PR1 and the second light transmission element PR2.

[0158] The third intermediate layer IL3' may be a fifth adhesive element. The third intermediate layer IL3' may provide increased adhesion strength between the fourth intermediate layer IL4' and the first light transmission element PR1.

[0159] The fourth intermediate layer IL4' can be the second reflector. Therefore, the light emitted by the second sensor can be reflected by the fourth intermediate layer IL4' and provided to the first reflector.

[0160] Furthermore, the fifth intermediate layer IL5' can be an absorbing layer. For example, the fifth intermediate layer IL5' can be made of a material that absorbs light emitted by the second sensor. The fifth intermediate layer IL5' can be a black-coated layer.

[0161] With reference to (d) of Fig. 11, a third intermediate layer IL3", a fourth intermediate layer IL4", a fifth intermediate layer IL5", a sixth intermediate layer IL6", and a seventh intermediate layer IL7" may be arranged between the first light transmission element PR1 and the second light transmission element PR2.

[0162] The third intermediate layer IL3'' and the seventh intermediate layer IL7'' can correspond to adhesive elements (e.g., the fifth adhesive element). Therefore, the increased adhesive force can be provided between the fourth intermediate layer IL4'' and the first light transmission element PR1. Furthermore, the improved adhesive force can be provided between the sixth intermediate layer IL6'' and the second light transmission element PR2.

[0163] The fifth intermediate layer IL5'' can be the second reflector. Therefore, the light emitted by the second sensor can be reflected by the fifth intermediate layer IL5'' and provided to the first reflector.

[0164] The sixth intermediate layer IL6'' may include an optical film or the like as a base element. Therefore, the sixth intermediate layer IL6'' can provide support force, optical performance, etc.

[0165] The seventh intermediate layer IL7'' can be an absorbing layer. The seventh intermediate layer IL7'' can, for example, be made of a material that absorbs light emitted by the second sensor. The seventh intermediate layer IL7'' can be a black-coated layer.

[0166] Fig. 12 is a modified example of Fig. 9 and a cross-sectional view along the line I-I'. Fig. 13 is a modified example of Fig. 9 and a cross-sectional view along the line II-II'.

[0167] With reference to Fig. 12 and Fig. 13, the first substrate SB1 and the second substrate SB2 may be arranged parallel to each other. The first substrate SB1 and the second substrate SB2 may be arranged adjacent to each other in the second direction (in the Y-axis direction). For example, the first substrate SB1 and the second substrate SB2 may have coplanar upper surfaces. The direction in which the first substrate SB1 and the second substrate SB2 are arranged parallel may be perpendicular to the direction in which the first substrate SB1 and the second substrate SB2 are arranged in Fig. 9 are arranged in parallel.

[0168] At least portions of the first sensor CM1 and the second sensor CM2 may overlap in the second direction (the Y-axis direction). In the present embodiment, the first sensor CM1 and the second sensor CM2 may be arranged sequentially in the second direction (the Y-axis direction), and the first substrate SB1 and the second substrate SB2 may also be arranged sequentially in the second direction (the Y-axis direction).

[0169] The first reflector 340 and the second reflector 350 may be arranged inclined to the second direction (the Y-axis direction). The first light transmission element PR1 may be arranged between the first reflector 340 and the second reflector 350. Furthermore, the second light transmission element PR2 may be arranged on the second reflector 350. Therefore, at least portions of the first reflector 340, the first light transmission element PR1, and the second reflector 350 (or the second light transmission element) may overlap in the second direction. Furthermore, the first light receiving unit RX1, the first light transmission unit TX1, the second light receiving unit RX2, and the second light transmission unit TX2 may be arranged in a line in one direction.

[0170] Fig. 14 is a view showing a second display area according to various examples of the display device according to the second embodiment.

[0171] With reference to (a) of Fig. 14, as in Fig. As described in Figure 9, the first substrate SB1 and the second substrate SB2 may be arranged in parallel so that their long side surfaces face each other. The first substrate and the second substrate may be arranged adjacent to each other in the first direction (the X-axis direction). For example, the first substrate SB1 and the second substrate SB2 may have coplanar upper surfaces.

[0172] At least portions of the first sensor CM1 and the second sensor CM2 may overlap in the first direction. The first sensor CM1 and the second sensor CM2 may be arranged one after the other in the first direction. Furthermore, the first substrate SB1 and the second substrate SB2 may also be arranged one after the other in the first direction.

[0173] Furthermore, the display area DA of the display panel 100 may include the first display area DA1 and the second display area DA2. The second display area DA2 may be arranged above the sensor CM or the first substrate and the second substrate. For example, the second display area DA2 may be an area that corresponds to or overlaps the sensor CM or the first substrate and the second substrate.

[0174] Furthermore, the second display area DA2 may have a length a and a width b corresponding to the structures of the first substrate and the second substrate (or the first sensor and the second sensor). The length may be a distance extending in the second direction. The length a and the width b of the second display area DA2 may be the same or substantially the same. Alternatively, the length a and the width b of the second display area DA2 may have a size difference of less than 20%.

[0175] With reference to (b) of Fig. 14, as in Fig. As described in Figure 12, the first substrate SB1 and the second substrate SB2 may be arranged in parallel so that their short side surfaces face each other. The first substrate SB1 and the second substrate SB2 may be arranged adjacent to each other in the second direction (in the Y-axis direction). Furthermore, the first substrate SB1 and the second substrate SB2 may have coplanar upper surfaces.

[0176] At least portions of the first sensor CM1 and the second sensor CM2 may overlap in the second direction (the Y-axis direction). The first sensor CM1 and the second sensor CM2 may be arranged consecutively in the second direction (the Y-axis direction). Furthermore, the first substrate SB1 and the second substrate SB2 may also be arranged consecutively in the second direction (the Y-axis direction).

[0177] Furthermore, the display area DA of the display panel 100 may include the first display area DA1 and the second display area DA2. The second display area DA2 may be disposed above the sensor CM or disposed above the first substrate and the second substrate. For example, the second display area DA2 may correspond to the sensor CM or be an area that corresponds to or overlaps the first substrate and the second substrate.

[0178] Furthermore, the second display region DA2 may have a length c and a width d corresponding to the structures of the first substrate and the second substrate (or the first sensor and the second sensor). The length may be a distance extending in the second direction. The length c and the width d of the second display region DA2 may be different. The length c of the second display region DA2 may be greater than the width d. For example, the length c in the second display region DA2 may be 1.5 times or more the width d.

[0179] In this way, the size and structure of the second display area DA2 can change depending on the positions of the first sensor and the second sensor (or the first substrate and the second substrate). Therefore, the structure of the second display area DA2 can be freely changed according to the structure of the display device, etc.

[0180] Fig. 15 is a first use example of a first sensor and a second sensor in a display device according to the embodiment, Fig. 16 is a side view of Fig. 15, Fig. 17 is a plan view of Fig. 15, and Fig. 18 is a view for describing the effects of the first use example of the first sensor and the second sensor in the display device according to the embodiment.

[0181] With reference to Fig. 15 to 18, as described above, the display device may include the substrate SB provided with the first sensor CM1 and the second sensor CM2. The first substrate SB1 and the second substrate SB2 of the substrate SB may be configured in a separate, connected, or coupled structure.

[0182] The first sensor CM1 may be arranged on the first substrate SB1. The second sensor CM2 may be arranged on the second substrate SB2. Furthermore, the first substrate SB1 and the second substrate SB2 may be arranged to intersect each other. The second substrate SB2 may be arranged to have a predetermined angle with respect to the first substrate SB1. Furthermore, an upper surface of the second substrate SB2 may not be parallel to an upper surface of the first substrate SB1. For example, the second substrate SB2 may be arranged perpendicular to the first substrate SB1.

[0183] The first light-emitting unit Tx1 of the first sensor CM1 and the second light-emitting unit Tx2 of the second sensor CM2 may not be aligned with each other in the first direction (X-axis direction). Furthermore, the first light-receiving unit RX1 of the first sensor CM1 may not be aligned with the second light-receiving unit Rx2 of the second sensor CM2 in the first direction.

[0184] For example, the second light emitting unit Tx2 of the second sensor CM2 may be plural. For example, the second light emitting unit Tx2 may include a 2-1 light emitting unit Tx2a and a 2-2 light emitting unit Tx2b. The second light receiving unit Rx2 may be arranged between the 2-1 light emitting unit Tx2a and the 2-2 light emitting unit Tx2b.

[0185] The 2-1 light-emitting unit Tx2a and the 2-2 light-emitting unit Tx2b may overlap the second light-receiving unit Rx2 in the second direction (the Y-axis direction). Furthermore, the first light-receiving unit RX1 of the first sensor CM1 may be arranged corresponding to one of the plurality of second light-emitting units Tx2.

[0186] The 2-1 light-emitting unit Tx2a and the 2-2 light-emitting unit Tx2b can emit light. The light emitted by the 2-1 light-emitting unit Tx2a and the 2-2 light-emitting unit Tx2b can be reflected by the first reflector onto the second display area or the display panel. In this case, since the second light-receiving unit Rx2 can be arranged between the 2-1 light-emitting unit Tx2a and the 2-2 light-emitting unit Tx2b, light that cannot be emitted to the upper display panel due to the arrangement of the second light-receiving unit Rx2 can be compensated. That is, the generation of the dark area or the deterioration of light uniformity due to the second light-receiving unit Rx2 in the second display area can be improved.

[0187] Fig. 19 is a second usage example of the first sensor and the second sensor in the display device according to the embodiment, Fig. 20 is a side view of Fig. 19, and Fig. 21 is a plan view of Fig. 19.

[0188] With reference to Fig. 19 to 21, the display device may also include the substrate SB provided with the first sensor CM1 and the second sensor CM2. The first substrate SB1 and the second substrate SB2 of the substrate SB may be configured in a separate, connected, or coupled structure. Furthermore, the first sensor CM1 may be arranged on the first substrate SB1. The second sensor CM2 may be arranged on the second substrate SB2. Furthermore, the first substrate SB1 and the second substrate SB2 may be arranged to intersect each other. The second substrate SB2 may be arranged to have a predetermined angle with respect to the first substrate SB1. Furthermore, an upper surface of the second substrate SB2 may not be parallel to an upper surface of the first substrate SB1. For example, the second substrate SB2 may be arranged perpendicular to the first substrate SB1.

[0189] The first light-emitting unit Tx1 of the first sensor CM1 and the second light-emitting unit Tx2 of the second sensor CM2 may be misaligned in the first direction (X-axis direction). Furthermore, the first light-receiving unit Rx1 of the first sensor CM1 may be misaligned with the second light-receiving unit Rx2 of the second sensor CM2 in the first direction (X-axis direction).

[0190] Furthermore, a plurality of second light emitting units Tx2 of the second sensor CM2 may be provided. For example, the second light emitting unit Tx2 may include the 2-1 light emitting unit Tx2a, the 2-2 light emitting unit Tx2b, and the 2-3 light emitting unit Tx2c. The second light receiving unit Rx2 may be arranged to be spaced apart from the 2-1 light emitting unit Tx2a, the 2-2 light emitting unit Tx2b, and the 2-3 light emitting unit Tx2c. For example, the second light receiving unit Rx2 may be arranged to be spaced apart from the 2-1 light emitting unit Tx2a, the 2-2 light emitting unit Tx2b, and the 2-3 light emitting unit Tx2c in the stacking direction (the Z-axis direction).

[0191] The 2-1 light-emitting unit Tx2a, the 2-2 light-emitting unit Tx2b, and the 2-3 light-emitting unit Tx2c may overlap in the second direction (the Y-axis direction). Furthermore, the 2-1 light-emitting unit Tx2a, the 2-2 light-emitting unit Tx2b, and the 2-3 light-emitting unit Tx2c may not overlap with the second light-receiving unit Rx2 in the second direction (the Y-axis direction). That is, the 2-1 light-emitting unit Tx2a, the 2-2 light-emitting unit Tx2b, and the 2-3 light-emitting unit Tx2c may be arranged so as not to be aligned with the second light-receiving unit Rx2 in the second direction (the Y-axis direction).

[0192] Furthermore, at least one of the plurality of second light emitting units Tx2 may overlap the second light receiving unit Rx2 in the stacking direction (Z-axis direction). Furthermore, the plurality of second light emitting units Tx2 may be arranged symmetrically with the second light receiving unit Rx2. For example, the 2-2 light emitting unit Tx2b may be arranged between the 2-1 light emitting unit Tx2a and the 2-3 light emitting unit Tx2c. Furthermore, the 2-2 light emitting unit Tx2b may overlap the second light receiving unit Rx2. With this configuration, the dark area of the second display area above the sensor CM can be slightly reduced, and the uniformity of light in the first display area and the second display area or in the second display area can be improved.

[0193] The second light-emitting unit Tx2 may be surrounded by a resin layer RL. The resin layer RL may be made of a light-transmitting material. Furthermore, the resin layer RL may improve optical performance, etc. Furthermore, the second light-emitting unit Tx2 may include, in addition to the light source, an optical element OPT having a plurality of reflection patterns. For example, the 2-1 light-emitting unit Tx2a may include a first optical element RT1 arranged in a light-emitting direction. The 2-2 light-emitting unit Tx2b may include a second optical element RT2 arranged in the light-emitting direction. Furthermore, the light-emitting unit Tx2c may include a third optical element RT3 arranged in the light-emitting direction.

[0194] Furthermore, the light emitted by the second light-emitting unit Tx2 can be reflected by the optical element OPT. Furthermore, the light emission direction can be controlled by a pattern structure. For example, the light emitted by the second light-emitting unit Tx2 can be used as an area light source. Therefore, the dark area for the second display area can be reduced based on an area rather than a point. For example, each of the plurality of second light-emitting units Tx2 can include an optical element.

[0195] Fig. 22 is a modified example of Fig. 15, Fig. 23 is a side view of Fig. 22, and Fig. 24 is a plan view of Fig. 22.

[0196] With reference to Fig. 22 to 24, in the display device, the first substrate SB1 and the second substrate SB2 of the substrate SB may be configured in a separate, connected, or coupled structure. Furthermore, the first sensor CM1 may be arranged on the first substrate SB1. The second sensor CM2 may be arranged on the second substrate SB2. Furthermore, the first substrate SB1 and the second substrate SB2 may be arranged to intersect each other. The second substrate SB2 may be arranged to have a predetermined angle with respect to the first substrate SB1. Furthermore, the first light-emitting unit Tx1 of the first sensor CM1 and the second light-emitting unit Tx2 of the second sensor CM2 may be non-aligned in the first direction (the X-axis direction).

[0197] There may be a plurality of second light emitting units Tx2 of the second sensor CM2. For example, the second light emitting unit Tx2 may include the 2-1 light emitting unit Tx2a and the 2-2 light emitting unit Tx2b. The second light receiving unit Rx2 may be arranged between the 2-1 light emitting unit Tx2a and the 2-2 light emitting unit Tx2b. The 2-1 light emitting unit Tx2a and the 2-2 light emitting unit Tx2b may overlap in the second direction. Furthermore, the first light receiving unit Rx1 of the first sensor CM1 may be arranged corresponding to any one of the plurality of second light emitting units Tx2.

[0198] The 2-1 light-emitting unit Tx2a and the 2-2 light-emitting unit Tx2b can emit light toward a conductive layer GL. That is, the 2-1 light-emitting unit Tx2a can emit light toward the 2-2 light-emitting unit Tx2b, and the 2-2 light-emitting unit Tx2b can emit light toward the 2-1 light-emitting unit Tx2a.

[0199] The second light-emitting unit Tx2 can be surrounded by the guiding layer GL. The guiding layer GL can guide the light emitted by the second light-emitting unit Tx2. Furthermore, a reflective element RM can be arranged in the guiding layer GL. The light emitted by the second light-emitting unit Tx2 can be uniformly directed toward the first reflector by the reflective element RM. Furthermore, an emission path of the light emitted by the second light-emitting unit Tx2 can be controlled by the reflective element RM.

[0200] Fig. 25 shows various examples of a pixel structure of a display panel in the display device according to the embodiment.

[0201] In the display device according to the embodiment, the display area of the display panel 100 may include the first display area DA1 and the second display area DA2. A plurality of first pixels PX1 in the first display area DA1 may emit light, and an image may be displayed by the emitted light. Furthermore, a plurality of second pixels PX2 in the second display area DA2 may also emit light, and an image may be displayed. In this way, the second pixel PX2 in the second display area DA2 may be arranged above the sensor, so that a full-screen display can be realized. In this case, the aperture areas of the first pixel PX1 and the second pixel PX2 may be the same or different.

[0202] With reference to (a) of Fig. 25, the opening areas of the first pixels PX1 and the second pixels PX2 may be equal or substantially equal. That is, the first display area DA1 and the second display area DA2 may have a symmetrical structure. Therefore, the display panel can be easily manufactured.

[0203] Alternatively, the opening areas of the first pixel PX1 and the second pixel PX2 (see (b) in Fig. 25 and (c) in Fig. 25). That is, the aperture areas of the first pixel PX1 and the second pixel PX2 may be different. For example, the aperture area for red (or green, blue) light emitted by the first pixel PX1 may be smaller than the aperture area for red (or green, blue) light emitted by the second pixel PX2.

[0204] The shape of the aperture area of a subpixel (R, G, or B) in each pixel can vary. For example, the aperture area of the subpixel can be square, circular, etc. Therefore, the aperture area of the subpixel in the first pixel PX1 can be different from the aperture area of the subpixel in the second pixel PX2, and the shape of the aperture area of the subpixel in the first pixel PX1 can be different from the aperture area of the subpixel in the second pixel PX2.

[0205] As a result, as described below, low transmittance in the second display area can be easily remedied by changing the area, shape, etc. of the opening area.

[0206] Fig. 26 shows various examples of the display panel and a polarizing plate in the display device according to various experimental examples, and Fig. 27 shows a captured image according to Fig. 26.

[0207] (a) of Fig. 26 to (c) of Fig. 26 are cross-sectional views of the second display area during transmission tests. Referring to (a) of Fig. 26 to (c) of Fig. 26, in the display panel 100 according to the embodiment, signal lines and pixels may be provided on an upper surface of a lower substrate. A liquid crystal in the liquid crystal layer 130 may be driven by an electric field generated by a voltage difference between a data voltage supplied to a pixel electrode and a common voltage supplied to a common electrode. The transmittance of the incident light from the backlight may be adjusted by driving the liquid crystal.

[0208] The upper polarizing plate 142 may be disposed on an upper substrate of the display panel 100. Furthermore, a lower polarizing plate 141 may be disposed on the lower substrate of the display panel 100. A light transmission axis of the upper polarizing plate 142 may intersect or be orthogonal to a light transmission axis of the lower polarizing plate 141.

[0209] In Experimental Example 1, as shown in (a) of Fig. 26, in the display panel, the above-described upper polarizing plate 142 and the lower polarizing plate 141 may be arranged both above and below the display panel 100. In Experimental Example 2, as shown in (b) of Fig. 26, both the upper polarizing plate and the lower polarizing plate may be removed in the display panel. In Experimental Example 3, as shown in (c) of Fig. 26, in the display panel, the lower polarizing plate may be removed and the upper polarizing plate may be present.

[0210] Fig. 27D may be an original image. In addition, an image in (a) of Fig. 27 the image obtained from the second sensor by the experimental example 1 of (a) of Fig. 26 was recorded. (b) of Fig. 27 is the image obtained by experimental example 2 of (b) of Fig. 26 was recorded. (c) by Fig. 27 is the image obtained from the second sensor by Experimental Example 3 of (c) of Fig. 26 was recorded.

[0211] As a result of the experiments, the transmittance was 6.85% in the case of (a) of Fig. 26, Fig. 5.7% in the case of (c) of Fig. 26 and Fig. 15.7% in the case of (b) of Fig. 26. In this way, it can be seen that the image quality deteriorates or decreases because the transmittance of the second display area decreases and a high level of haze is generated when the upper polarizing plate 150 and the lower polarizing plate 140 are arranged above / below the second display area.

[0212] In a modified example, a non-aperture region may be concentrated on one side instead of the open region of the display panel. For example, the non-aperture region, such as a data line and a gate line, may be concentrated at an edge of a pixel. Therefore, a width or area of the non-aperture region between adjacent pixels can be reduced. As a result, a gap between adjacent pixels can be narrowed, thereby improving the transmittance of the entire display region. That is, when the pixels are halved in the horizontal and vertical directions, most of the non-aperture region (e.g., 70% or more) may be present in one quadrant. The concentrated structure of the non-aperture region may be applied only to the second display region. Therefore, the aperture ratio of the second display region may be larger than the aperture ratio of the first display region.As a result, more accurate sensing or image capture can be achieved by increasing the transmittance in the second display area.

[0213] Fig. 28 is a view showing various pixel structures having different aperture ratios in a second display area in the display device, Fig. 29 is a cross-sectional view of the display device having pixels with different aperture ratios according to the embodiment, and Fig. 30 is a video image according to Fig. 28.

[0214] In Fig. 28 shows (a) of Fig. 28 a pixel structure of Experimental Example 1, (b) of Fig. 28 shows the pixel structure of Experimental Example 2, and (c) of Fig. 28 shows the pixel structure of Experimental Example 3. In addition, (a) of Fig. 30 a video image generated by (a) of Fig. 28. (b) of Fig. 30 is a video image result by (b) of Fig. 28. In addition, (c) of Fig. 30 a video image result by (c) of Fig. 28.

[0215] Firstly, with reference to Fig. 29, the second pixel of the second display area DA2 in the display panel of the display device according to the embodiment may include a 2-1 pixel and a 2-2 pixel having different areas to reduce the above-described deterioration in transmittance and the high haze level in the second display area. Here, the 2-1 pixel may be a subpixel for at least one color among red (R), green (G), and blue (B). Furthermore, the 2-2 pixel may be a subpixel for the white color. In experimental examples, an area (opening area) of the 2-1 pixel (R, G, B) may correspond to an area that does not overlap a black matrix on a color filter of the corresponding color. Furthermore, an area (opening area) of the 2-2 pixel (White, W) may correspond to an area that does not overlap the black matrix without the color filter such as R, G, and B.

[0216] With reference to (a) of Fig. 28, in Comparative Example 1 below, specifically, the second pixel PX2 in the second display area DA2 may be formed only of the 2-1 pixel PX2 that is one of red (R), green (G), and blue (B). On the other hand, referring to (b) of Fig. 28, in Experimental Example 2 below, the second pixel PX2 in the second display area DA2 may include the 2-1 pixel PX2a, which is one of red (R), green (G), or blue (B), and the 2-2 pixel PX2b, which is white (W). In this case, an aperture ratio (aperture area) of the 2-1 pixel PX2a may be equal to or substantially equal to the aperture ratio (aperture area) of the 2-2 pixel PX2b. Referring to (c) of Fig. 28, in the experimental example below, the second pixel PX2' in the second display area DA2 may include the 2-1 pixel PX2a' that is either red (R), green (G), or blue (B), and the 2-2 pixel PX2b' that is white (W). Experimental Example 3 is the same as or substantially the same as Experimental Example 2, but the aperture ratio (aperture area) of the 2-1 pixel PX2a' may be smaller than the aperture ratio (aperture area) of the 2-2 pixel PX2b'.

[0217] Table 1 shows the experimental results for the specifications and transmittance for the structure of Fig. 28 and a reference example. [Table 1] Punkt Ref (Referenzbeispiel) Versuchsbeispiel 1 Versuchsbeispiel 2 Versuchsbeispiel 3 Auflösung 1920*RGB*1080 1920*RGB*1080 3840*2160 3840*2160 Transmissionsgrad des Panels (Anzeigepanel) 5,0% 7,9% 17,0% 20,1% Obere Polarisationsschicht 78% (Haze 22%) 98% (Haze<1%) 98% (Haze<1%) 98% (Haze<1%) C / F (Farbfilter-Verhältnis) 30% 30% RGB 30%, Weiß 100% RGB 30%, Weiß 100% L / C (Verhältnis der Flüssigkristallschicht) 90% 90% 90% 90% TFT (aperture ratio) 66% 66% RGB 33%, White 33% RGB 22%, White 44% Lower polarization layer 36% (Haze 22%) 45% (Haze<1%) 45% (Haze<1%) 45% (Haze<1%)

[0218] With reference to Table 1 and Fig.30, comparing Reference Example with Experimental Example 1, it can be seen that the transmittance in the second display area of the display panel is increased by increasing the transmittance of the upper and lower polarizing layers and by reducing the haze level. Furthermore, comparing Experimental Example 2 with Experimental Example 1 (or Reference Example), it can be seen that the transmittance in the second display area of the display panel is increased because the second display area includes both the 2-1 pixel and the 2-2 pixel.

[0219] Furthermore, when comparing Experimental Example 3 with Experimental Example 1 (Experimental Example 2 and Reference Example), it can be seen that the transmittance in the second display area of the display panel is further increased when the second display area has both the 2-1 pixel and the 2-2 pixel and the aperture ratio (opening area) of the 2-2 pixel is larger than the aperture ratio (opening area) of the 2-1 pixel.

[0220] Therefore, in order to increase the transmittance, the upper polarizing plate and the lower polarizing plate overlapping the second display area in the display device according to the embodiment may be removed. Furthermore, the polarizing plate may be provided with a reduced haze level or an increased transmittance. Furthermore, as shown in Fig.29, an area (opening area, W1) of the 2-2 pixel (W) in the display panel may be larger than or equal to the area (opening area, W2) of the 2-1 pixel (R, G, B). Moreover, to further increase the transmittance, the area (opening area, W1) of the 2-2 pixel (W) in the display panel may be larger than the area (opening area, W2) of the 2-1 pixel (R, G, B).

[0221] According to embodiments, an image pickup area is not detected from the outside, the phenomenon of a dark area in an area where a sensor is arranged can be improved, and light uniformity can be improved. Furthermore, low-power operation can be possible.

[0222] In addition, it is possible to achieve miniaturization through a narrow aperture and a smaller thickness.

[0223] Furthermore, an embodiment may provide a display device with increased transmittance.

Claims

[1] A display device (10) comprising: a backlight unit (300); a display panel (100) arranged on the backlight unit (300) and having a first display area (DA1) and a second display area (DA2); and a first sensor (CM1) and a second sensor (CM2) arranged below the display panel (100), wherein the backlight unit (300) comprises: a light guide plate (320) having a first light guide portion (320a) arranged under the first display area (DA1) and a second light guide portion (320b) arranged under the second display area (DA2); a light source (310) configured to radiate light onto the light guide plate (320); and a first reflector (340) arranged on the second light guide section (320b), and wherein the first reflector (340) is configured to transmit light (LG2) emitted by the first sensor (CM1) and to reflect light (LG4) emitted by the second sensor (CM2). [2] The display device (10) according to claim 1, wherein the light (LG2) emitted from the first sensor (CM1) is emitted to the outside by passing through the display panel (100), being reflected by an external object, and being received by the first sensor (CM1). [3] The display device (10) according to claim 1 or 2, wherein the light source (310) is arranged on one side of the light guide plate (320), and the light guide plate (320) has an inclined surface (SS1) arranged on the other side of the light guide plate (320) opposite to the one side of the light guide plate (320), and wherein the first reflector (340) is arranged on the inclined surface (SS1) of the light guide plate (320). [4] The display device (10) according to claim 3, wherein the inclined surface (SS1) does not overlap an upper surface of the light guide plate (320). [5] The display device (10) according to claim 3 or 4, wherein a thickness of the light guide plate (320) decreases toward the other side along the inclined surface (SS1). [6] The display device (10) according to any one of claims 3 to 5, further comprising a first light transmission element (PR1) arranged between the inclined surface (SS1) of the light guide plate (320) and the display panel (100). [7] The display device (10) according to claim 6, wherein the first light transmission element (PR1) is arranged between a second light emission unit (TX2) of the second sensor (CM2) and the first reflector (340). [8] The display device (10) according to any one of claims 3 to 5, wherein the first sensor (CM1) comprises a first light emitting unit (TX1) and an infrared camera (RX1) and the second sensor (CM2) comprises a second light emitting unit (TX2) and an RGB camera (RX2). [9] The display device (10) according to claim 8, further comprising: a first substrate (SB1) on which the first sensor (CM1) is arranged; and a second substrate (SB2) on which the second sensor (CM2) is arranged. [10] The display device (10) according to claim 9, wherein the first substrate (SB1) and the second substrate (SB2) are arranged to intersect each other. [11] The display device (10) according to claim 10, wherein the second light emitting unit (TX2) is located adjacent to the infrared camera (RX1) and the first light emitting unit (TX1) is located adjacent to the RGB camera (RX2). [12] The display device (10) according to claim 10 or 11, wherein the first sensor (CM1) and the second sensor (CM2) are configured to emit light in intersecting directions. [13] The display device (10) according to claim 9, wherein the first substrate (SB1) and the second substrate (SB2) are arranged parallel to each other and the first substrate (SB1) and the second substrate (SB2) are adjacent to each other in a first direction (X) to a side portion or in a second direction (Y) perpendicular to the first direction (X). [14] The display device (10) according to claim 13, wherein the first sensor (CM1) and the second sensor (CM2) at least partially overlap in the first direction (X). [15] The display device (10) according to claim 13 or 14, further comprising: a first light transmission element (PR1) arranged between the inclined surface (SS1) of the light guide plate (320) and the display panel (100); and a second reflector (350) arranged on an inclined surface (SS2) of the first light transmission element (PR1), wherein the second reflector (350) is configured to reflect light (LG4) emitted by the second sensor (CM2) onto the display panel (100). [16] The display device (10) according to claim 15, further comprising a second light transmission element (PR2) arranged on the inclined surface (SS2) of the first light transmission element (PR1), wherein the second reflector (350) is arranged between the second light transmission element (PR2) and the first light transmission element (PR1). [17] The display device (10) according to any one of claims 1 to 16, wherein an opening area of a first pixel (PX1) of the first display area (DA1) has an area different from an opening area of a second pixel (PX2) of the second display area (DA2). [18] The display device (10) according to any one of claims 1 to 17, wherein a second pixel (PX2, PX2') of the second display area (DA2) comprises a 2-1 pixel (PX2a, PX2a') configured to output red, green and blue light and a 2-2 pixel (PX2b, PX2b') configured to output white light. [19] The display device (10) according to claim 18, wherein an area of the 2-1 pixel (PX2a') is smaller than an area of the 2-2 pixel (PX2b'). [20] The display device (10) according to any one of claims 1 to 19, wherein the backlight unit (300) further comprises an optical plate (330) arranged between the light guide plate (320) and the display panel (100), the optical plate (330) having an opening (331) corresponding to the second display area (DA2).

Images