Display device

Abstract

A display device includes a backlight unit including a first light guide plate and a first light source element, a liquid crystal display panel located on an upper surface of the first light guide plate and including a sensing area, and an optical module located on a lower surface of the first light guide plate and including a reflective structure having an inclined surface. The display device further includes a second light source element, a module sheet, and an optical element, wherein the inclined surface of the reflective structure overlaps the sensing area of the liquid crystal display panel, and the second light source element and the optical element are located on different surfaces of the reflective structure to minimize a luminance deviation between an active area of the display device and the sensing area.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit of Korean Patent Application No. 10-2024-0202813, filed on December 31, 2024, which is incorporated herein by reference as if fully set forth herein. Technical Field

[0003] This disclosure relates to a display device including a liquid crystal display panel and an optical module. Background Technology

[0004] Display devices equipped with liquid crystal display panels are widely used in vehicles. For example, vehicle displays can show speed, mileage, remaining fuel, navigation information, RPM, etc. Furthermore, vehicles can be equipped with advanced driver assistance systems (ADAS), such as driver monitoring systems (DMS). ADAS can include cameras.

[0005] However, because the display device and camera module for the driver monitoring system (DMS) installed in the vehicle are separate, there are limitations on reducing the bezel size of the display device. Therefore, a display device that overcomes this defect and disadvantage, as well as other defects and disadvantages, of known solutions would be beneficial. Summary of the Invention

[0006] A liquid crystal display device may include a backlight and a liquid crystal display panel that uses light supplied from the backlight to generate an image. The backlight may include a backlight element located on a side surface of a backlight guide plate. The liquid crystal display panel may be located above the backlight guide plate.

[0007] The display device may include a light source module capable of detecting external light or capturing images. For example, the light source module may include at least one of a camera or an IR sensor. The light source module may overlap with a portion of a liquid crystal display panel. For example, the liquid crystal display panel may include an active area overlapping with a backlight guide plate and a sensing area overlapping with the light source module.

[0008] The sensing area can be located within the active area. However, since the sensing area of ​​the liquid crystal display panel does not emit light to realize the image, the quality of the image provided to the user in the display device may be degraded due to the brightness difference between the active area and the sensing area.

[0009] Therefore, this disclosure relates to a display device that substantially eliminates one or more problems caused by the limitations and disadvantages of related technologies.

[0010] One embodiment of this disclosure provides a display device capable of minimizing the brightness deviation between the active area and the sensing area.

[0011] Another embodiment of this disclosure provides a display device that allows an optical module to detect external light through a sensing area of ​​a liquid crystal display panel without degrading the quality of the image.

[0012] This disclosure is not limited to the foregoing aspects. Those skilled in the art will clearly understand from the following description aspects that are not mentioned above.

[0013] Further advantages, aspects, and features of this disclosure will be set forth in the description which follows, and will become apparent to those skilled in the art upon examination of the following, or may be learned from practice of this disclosure. Embodiments and other advantages of this disclosure may be realized and obtained by means of the written description and its claims, the structures and equivalents particularly pointed out in the drawings, and the knowledge of those skilled in the art.

[0014] To achieve these and other advantages and according to embodiments of the present disclosure, the display device includes: a backlight unit or backlight assembly including a first light guide plate and a first light source element; a liquid crystal display panel located on an upper surface of the first light guide plate and including a sensing area; and an optical module located on a lower surface of the first light guide plate and including a reflective structure having an inclined surface, a second light source element, a module sheet, and optical elements, wherein the inclined surface of the reflective structure overlaps with the sensing area of ​​the liquid crystal display panel, and the second light source element and optical elements are located on different surfaces of the reflective structure.

[0015] Details of other aspects and embodiments of this disclosure are included in the detailed description and accompanying drawings.

[0016] It should be understood that the foregoing background and the following detailed description are both exemplary and illustrative, and are intended to provide further explanation of the disclosure, rather than to limit the claims. Attached Figure Description

[0017] The accompanying drawings, included to provide a further understanding of this disclosure and incorporated into and constituting a part of this application, illustrate embodiments of the disclosure and, together with the specification, serve to illustrate the principles of the disclosure. In the drawings:

[0018] Figure 1 This is a schematic diagram of a display device according to one embodiment of the present disclosure;

[0019] Figure 2 include Figure 1 The display devices along the respective Figure 1Two cross-sectional views taken from lines I-I' and II-II';

[0020] Figure 3 for Figure 2 A magnified view of area K of the display device;

[0021] Figure 4 for Figure 1 A cross-sectional view of a sub-pixel of a display device;

[0022] Figure 5 To show Figure 1 A schematic diagram of the light source, light guide plate, and reflector of the optical module of the display device;

[0023] Figure 6 This is a schematic diagram illustrating the light source and visible light reflection structure of an optical module according to one embodiment of the present disclosure;

[0024] Figure 7 To show Figure 6 A schematic diagram of the configuration of the optical module chips; and

[0025] Figure 8 To show Figure 7 A graph showing the transmittance and reflectance of the film. Detailed Implementation

[0026] The aspects and technical configurations of this disclosure, and the resulting operational effects, will become clearer through the following detailed description with reference to the accompanying drawings illustrating embodiments of this disclosure. Since embodiments of this disclosure are provided to fully convey the technical concept of this disclosure to those skilled in the art, this disclosure may be embodied in other forms and is not limited to the embodiments described below.

[0027] Furthermore, unless the context otherwise indicates, parts designated by the same reference numerals throughout the specification refer to the same components, and for convenience, the length and thickness of layers or regions in the drawings may be enlarged. In some instances, the drawings or certain aspects of the drawings are drawn to scale. Additionally, when a first component is referred to as being "on" a second component, the first component may be directly on the second component, or a third component may be located between the first and second components.

[0028] The terms "first," "second," etc., are used to describe multiple components and to distinguish one component from another. However, without departing from the spirit of this disclosure, the first component and the second component may be named arbitrarily as is convenient for those skilled in the art. Therefore, unless otherwise stated below, a "first" component may be a "second" component, and vice versa.

[0029] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the disclosure. For example, unless the context clearly indicates otherwise, a component expressed in the singular includes a plural of components. Furthermore, the terms “comprising,” “including,” “containing,” and “having” are inclusive and thus specify the presence of the said feature, integer, step, operation, element, and / or component, but do not preclude the possibility of the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0030] Furthermore, unless otherwise defined, all terms used herein (including technical or scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Unless the context clearly defines the meaning, terms as defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant technical context and should not be interpreted as having an idealized or overly formal meaning.

[0031] Figure 1 This is a schematic diagram of a display device 10 according to one embodiment of the present disclosure. Figure 2 For along Figure 1 The cross-sectional views taken from lines I-I' and II-II'. Figure 3 for Figure 2 A magnified view of region K. Figure 4 This is a cross-sectional view of a sub-pixel of the display device 10.

[0032] Reference Figures 1 to 4 The display device 10 includes a liquid crystal display panel 100, a backlight unit 200 (which may also be referred to herein as a backlight assembly 200 or simply as backlight 200) and an optical module 300.

[0033] The liquid crystal display panel 100 is configured to generate an image to be provided to a user. For example, the liquid crystal display panel 100 includes: an active region AA (pixel regions may also be referred to herein as pixels) in which a plurality of pixel areas are positioned; and a border region BZ located outside the active region AA. The liquid crystal display panel 100 may include a sensing region HA for sensing external light or capturing an image within the active region AA. The sensing region HA of the liquid crystal display panel 100 provides external light to the optical module 300.

[0034] The liquid crystal display panel 100 includes a liquid crystal layer LC overlapping the pixel regions. Various signals can be applied to each pixel region via signal lines. For example, the liquid crystal in the portion of the liquid crystal layer overlapping the pixel regions can be rotated by a vertical or horizontal electric field formed in the respective pixel region via the signal lines. Therefore, in a display device according to one embodiment of the present disclosure, images of various colors can be generated by light emitted from the active region AA of the liquid crystal display panel 100.

[0035] like Figure 4 As best shown, the liquid crystal display panel 100 includes a liquid crystal layer LC located between a first display substrate 110 and a second display substrate 120. The first display substrate 110 and the second display substrate 120 may contain insulating materials or other materials. The first display substrate 110 and the second display substrate 120 may contain transparent materials. For example, in some non-limiting embodiments, the first display substrate 110 and the second display substrate 120 contain glass or plastic. In some embodiments, the second display substrate 120 contains the same or different materials as the first display substrate 110. The liquid crystal layer LC contains liquid crystal manipulated using a variety of techniques. For example, the liquid crystal of the liquid crystal layer LC can be manipulated using in-plane switching mode (IPS) or fringe field switching mode (FFS). The liquid crystal of the liquid crystal layer LC overlapping with each sub-pixel region PA can be rotated by a vertical or horizontal electric field formed in the respective sub-pixel region PA via a gate signal and a data signal. For example, each sub-pixel region PA or each sub-pixel may include a pixel electrode 130 and a common electrode 140 for forming a horizontal electric field.

[0036] In this implementation, a constant power supply voltage is supplied to the common electrode 140 of each sub-pixel region PA. Based on the gate signal applied to each sub-pixel region PA, a driving voltage corresponding to the data signal applied to the corresponding sub-pixel region PA is supplied to the pixel electrode 130 of that sub-pixel region PA. That is, in the display device 10, a horizontal electric field is formed in the corresponding sub-pixel region PA by the driving voltage applied to the pixel electrode 130 of each sub-pixel region PA and the power supply voltage applied to the common electrode 140. The driving voltage applied to the pixel electrode 130 of each sub-pixel region PA can be maintained for one frame or for another period of time.

[0037] Each sub-pixel region PA has at least one thin-film transistor Tr and a storage capacitor Cst positioned therein. The thin-film transistor Tr of each sub-pixel region PA generates a driving voltage corresponding to the data signal applied to the corresponding sub-pixel region PA based on the gate signal applied to that sub-pixel region PA. The thin-film transistor Tr of each sub-pixel region PA is electrically connected to a gate line GL and a data line DL. For example, the thin-film transistor Tr of each sub-pixel region PA includes: a gate electrode 121 electrically connected to one of the gate lines GL, a semiconductor pattern 122 including a region overlapping with the gate electrode 121, a drain electrode 123 electrically connected to one end of the semiconductor pattern 122, and a source electrode 124 electrically connected to the other end of the semiconductor pattern 122.

[0038] Gate electrode 121 comprises a conductive material. For example, gate electrode 121 may comprise a metal, such as aluminum (Al), chromium (Cr), copper (Cu), molybdenum (Mo), titanium (Ti), or tungsten (W). Semiconductor pattern 122 is located on gate electrode 121. Semiconductor pattern 122 comprises a semiconductor material. For example, semiconductor pattern 122 may comprise amorphous silicon (a-Si), polycrystalline silicon (poly-Si), or oxide semiconductor, such as IGZO. Semiconductor pattern 122 includes a channel region located between a drain region and a source region. For example, gate electrode 121 overlaps with the channel region of semiconductor pattern 122. The drain region and source region of semiconductor pattern 122 are located outside of gate electrode 121.

[0039] The drain and source regions of semiconductor pattern 122 have lower resistance than the channel region of semiconductor pattern 122. For example, the drain and source regions of semiconductor pattern 122 comprise conductive regions of oxide semiconductor. The channel region of semiconductor pattern 122 is a non-conductive region of oxide semiconductor. Semiconductor pattern 122 is spaced apart from gate electrode 121. Semiconductor pattern 122 is insulated from gate electrode 121. For example, the channel region of semiconductor pattern 122 has a conductivity corresponding to the voltage supplied to gate electrode 121. The drain region of semiconductor pattern 122 is electrically connected to the source region of semiconductor pattern 122 according to the signal supplied to gate electrode 121.

[0040] Drain electrode 123 and source electrode 124 comprise conductive materials. For example, drain electrode 123 and source electrode 124 may comprise metals such as aluminum (Al), chromium (Cr), copper (Cu), molybdenum (Mo), titanium (Ti), or tungsten (W). Drain electrode 123 and source electrode 124 may comprise materials different from those of gate electrode 121. For example, drain electrode 123 and source electrode 124 may be located on a different layer than gate electrode 121. Source electrode 124 may be located on the same layer as drain electrode 123. Source electrode 124 may comprise the same material as drain electrode 123. Source electrode 124 may be formed by the same or different processes as drain electrode 123. For example, in one embodiment, source electrode 124 and drain electrode 123 are formed simultaneously.

[0041] Drain electrode 123 is electrically connected to the drain region of semiconductor pattern 122. Source electrode 124 is electrically connected to the source region of semiconductor pattern 122. Drain electrode 123 and source electrode 124 are insulated from gate electrode 121. Source electrode 124 is spaced apart from drain electrode 123. For example, the drain electrode 123 of each sub-pixel region PA is electrically connected to one of the data lines DL. Drain electrode 123 is integrally formed with one of the data lines DL. Pixel electrode 130 of each sub-pixel region PA is electrically connected to the source electrode 124 of the corresponding sub-pixel region PA.

[0042] The storage capacitor Cst of each sub-pixel region PA holds the signal applied to the gate electrode 121 of the corresponding sub-pixel region PA within a frame. For example, the storage capacitor Cst of each sub-pixel region PA is electrically connected to the gate electrode 121 of the corresponding sub-pixel region PA and the power supply voltage supply line that supplies the power supply voltage.

[0043] The thin-film transistor Tr and storage capacitor Cst of each sub-pixel region PA are located between the first display substrate 110 and the liquid crystal layer LC. A plurality of insulating films 111, 112, 113, and 114 may be located between the first display substrate 110 and the liquid crystal layer LC to prevent unnecessary conductive connections. For example, a gate insulating film 111, a component protection film 112, a planarization film 113, and an interlayer insulating film 114 are located between the first display substrate 110 and the liquid crystal layer LC.

[0044] The gate insulating film 111 may be positioned close to the first display substrate 110, or in some embodiments, directly positioned on the first display substrate 110. The semiconductor pattern 122 of each sub-pixel region PA is insulated from the gate electrode 121 of the corresponding sub-pixel region PA by the gate insulating film 111. For example, the gate insulating film 111 covers the gate electrode 121 of each sub-pixel region PA. The semiconductor pattern 122 of each sub-pixel region PA is located on the gate insulating film 111. Each of the drain electrode 123 and source electrode 124 of each sub-pixel region PA is in direct contact with a portion of the semiconductor pattern 122 located within the corresponding sub-pixel region PA. For example, the drain electrode 123 and source electrode 124 of each sub-pixel region PA are located on the gate insulating film 111. The gate insulating film 111 contains an insulating material. For example, the gate insulating film 111 may contain an inorganic insulating material, such as silicon oxide (SiO2). x ) or silicon nitride (SiN) x ).

[0045] A protective film 112 or protective film is located on the gate insulating film 111. The protective film 112 prevents damage to the thin-film transistors Tr located within each sub-pixel region PA due to external impacts and moisture. For example, the semiconductor pattern 122, drain electrode 123, and source electrode 124 of each sub-pixel region PA are covered by the protective film 112. The protective film 112 contains an insulating material. For example, the protective film 112 may contain an inorganic insulating material, such as silicon oxide (SiOx) or silicon nitride (SiNx).

[0046] Planarization film 113 is located on element protective film 112. Planarization film 113 can remove steps caused by thin-film transistors Tr and storage capacitors Cst in each sub-pixel region PA. For example, the upper surface of planarization film 113 facing the liquid crystal layer LC is parallel to the upper surface of the first display substrate 110 facing the liquid crystal layer LC. Planarization film 113 contains an insulating material. Planarization film 113 may contain a different material than element protective film 112. Planarization film 113 may contain a material with relatively high fluidity. For example, planarization film 113 may contain an organic insulating material.

[0047] A common electrode 140 is located on the planarization film 113. An interlayer insulating film 114 is located between the planarization film 113 and the liquid crystal layer LC. The common electrode 140 of each sub-pixel region PA is insulated from the pixel electrode 130 of the corresponding sub-pixel region PA by the interlayer insulating film 114. For example, the interlayer insulating film 114 covers the common electrode 140 of each sub-pixel region PA. The pixel electrode 130 of each sub-pixel region PA is located between the interlayer insulating film 114 and the liquid crystal layer LC. Each pixel electrode 130 has at least one slit. The interlayer insulating film 114 contains an insulating material. For example, the interlayer insulating film 114 may contain an inorganic insulating material.

[0048] A color filter 151, a black matrix 152, and an upper protective film 115 are positioned between the liquid crystal layer LC and the second display substrate 120. The color filter 151 overlaps with the sub-pixel region PA. For example, each color filter 151 may overlap with one or more of the sub-pixel regions PA. Each color filter 151 can use light that has passed through the liquid crystal layer LC to display a specific color. For example, light that has passed through each color filter 151 may display one of red, blue, and green. The black matrix 152 is positioned parallel to the color filter 151. For example, the ends of each color filter 151 overlap with the black matrix 152. Although... Figure 4 The illustration shows that the ends of each color filter 151 overlap with the black matrix 152, and the ends of two adjacent color filters 151 do not overlap with each other on the black matrix 152, but this disclosure is not limited thereto. The ends of two adjacent color filters 151 may overlap with each other on the black matrix 152.

[0049] The black matrix 152 contains materials capable of reflecting or absorbing light. For example, light that has passed through the liquid crystal layer LC of each sub-pixel region PA passes through the color filter 151 located within the area defined by the black matrix 152 of the corresponding sub-pixel region PA and is emitted to the outside. Therefore, in the display device 10, images including a wide variety of colors can be provided to the user.

[0050] The black matrix 152 overlaps with the gate line GL and the data line DL. The thin-film transistor Tr and storage capacitor Cst of each sub-pixel region PA overlap with the black matrix 152. Therefore, in the display device 10, the gate line GL and data line DL, as well as the thin-film transistor Tr and storage capacitor Cst of each sub-pixel region PA, cannot be identified by the user due to the black matrix 152. That is, in the display device 10, image quality degradation caused by the user identifying the gate line GL and data line DL, as well as the thin-film transistor Tr and storage capacitor Cst of each sub-pixel region PA can be prevented. The color filter 151 and the black matrix 152 are covered by an upper protective film 115. The upper protective film 115 can prevent damage to the color filter 151 and the black matrix 152 due to external impact and moisture. The upper protective film 115 contains an insulating material. For example, the upper protective film 115 may contain an inorganic insulating material, such as silicon oxide (SiO2). x ) or silicon nitride (SiNx).

[0051] Spacer 160 is located between interlayer insulating film 114 and upper protective film 115. Spacer 160 maintains a constant gap between interlayer insulating film 114 and upper protective film 115. Therefore, in display device 10, the liquid crystal layer LC of each sub-pixel region PA has the same thickness. Therefore, in display device 10, light passing through the liquid crystal layer LC of each sub-pixel region PA has the same optical path. Furthermore, in display device 10, the light passing through the liquid crystal layer LC of each sub-pixel region PA has the same brightness as the light that has passed through liquid crystal layers LC of different sub-pixel regions PA in which the same horizontal electric field is formed.

[0052] The backlight unit 200 is located below the liquid crystal display panel 100. The backlight unit 200 supplies light to the liquid crystal display panel 100. For example, the backlight unit 200 includes a backlight element 210 (which may also be referred to herein as a light source 210 or a light element 210), a backlight guide plate 220, a backlight reflector 230, and a backlight sheet 240.

[0053] The backlight element 210 can supply light to the liquid crystal display panel 100 through the backlight guide plate 220. For example, the backlight element 210 is located on the side surface 220S of the backlight guide plate 220. The backlight element 210 includes a backlight circuit board 211 and a backlight 212 or light source 212 mounted on the backlight circuit board 211. The backlight 212 can be a self-emissive element capable of generating and emitting light. For example, in some embodiments, the backlight 212 is an LED.

[0054] The backlight reflector 230 is located below the backlight guide plate 220. For example, the backlight guide plate 220 is located between the backlight reflector 230 and the liquid crystal display panel 100. The backlight reflector 230 contains a material capable of reflecting light. For example, the backlight reflector 230 may contain a metal, such as aluminum (Al) or silver (Ag). Therefore, in the display device 10, light emitted through the lower surface 220L of the backlight guide plate 220 can be reflected towards the liquid crystal display panel 100 by the backlight reflector 230. Therefore, in the display device 10, the backlight unit 200 can increase the amount of light supplied to the liquid crystal display panel 100.

[0055] The backlight sheet 240 is located between the backlight guide plate 220 and the liquid crystal display panel 100. The light supplied to the liquid crystal display panel 100 through the backlight guide plate 220 can have uniform brightness throughout because it passes through the backlight sheet 240. For example, the backlight sheet 240 has a stacked structure of a prism sheet 241 and a diffuser sheet 242.

[0056] The prism sheet 241 includes a prism member 241p or a prism 241p located on a first base substrate 241s. The cross-sectional shape of the prism member 241p can be a shape in which triangles are repeatedly arranged, or in other words, the cross-sectional shape of the prism 241p is a series of repeating and adjacent triangles. The first base substrate 241s contains a transparent material. For example, the first base substrate 241s can contain plastic. The prism member 241p contains a transparent material. For example, the prism member 241p can be formed of the same material as the first base substrate 241s. In such an embodiment, the interface between the first base substrate 241s and the prism member 241p may not be identifiable or visible to the user.

[0057] The diffuser sheet 242 includes diffuser particles 242p dispersed on the second base substrate 242s. The second base substrate 242s may contain a transparent material. For example, the second base substrate 242s may contain plastic. The second base substrate 242s may contain the same material as the first base substrate 241s, or it may be a different material. The diffuser particles 242p may have a variety of sizes. Therefore, in the display device 10, the uniformity of light supplied to the liquid crystal display panel 100 through the backlight sheet 240 can be improved. The diffuser particles 242p may be fixed on the second base substrate 242s by a transparent resin or some other adhesive.

[0058] The backlight unit 200 includes a bottom cover 250 configured to house a backlight element 210, a backlight guide plate 220, a backlight reflector 230, and a backlight sheet 240. The bottom cover 250 comprises an insulating material; for example, it may comprise plastic. The bottom cover 250 may include a bottom surface 250B and sidewalls 250S projecting from an edge 250E, the sidewalls 250S being the outermost edge or surface of the bottom surface 250B. The backlight reflector 230 is located between the backlight guide plate 220 and the bottom surface 250B of the bottom cover 250. The backlight element 210, the backlight guide plate 220, and the backlight sheet 240 are located within the space formed by the sidewalls 250S of the bottom cover 250. For example, the sidewalls 250S of the bottom cover 250 surround the backlight element 210, the backlight guide plate 220, and the backlight sheet 240.

[0059] The backlight unit 200 includes an intermediate frame 260 for supporting the liquid crystal display panel 100. The intermediate frame 260 can be coupled to the bottom cover 250. For example, the intermediate frame 260 may include a coupling region 260C extending between the bottom cover 250 and the backlight guide plate 220. In other words, at least a portion of the sidewall of the intermediate frame 260 overlaps with the inner sidewall surface of the bottom cover 250 to form a coupling region in which the intermediate frame 260 is coupled to the bottom cover 250. A backlight element 210 is fixed to the coupling region 260C of the intermediate frame 260. For example, the backlight element 210 is attached to the coupling region 260C of the intermediate frame 260 by an adhesive member. The intermediate frame 260 includes a mounting region 260M extending between the backlight sheet 240 and the liquid crystal display panel 100. The mounting region 260M of the intermediate frame 260 overlaps with the edge of the backlight sheet 240. For example, the mounting area 260M of the intermediate frame 260 overlaps with the bezel area BZ of the liquid crystal display panel 100. The active area AA of the liquid crystal display panel 100 may not overlap with the mounting area 260M of the intermediate frame 260. For example, the central area of ​​the backlight sheet 240 may be exposed through an opening in the intermediate frame 260. The mounting area 260M of the intermediate frame 260 may be in direct contact with the backlight sheet 240 and may be configured such that the intermediate frame 260 extends below the liquid crystal display panel 100 by a selected distance and supports the extension of the liquid crystal display panel 100. Therefore, in the display device 10, the intermediate frame 260 can prevent movement of the backlight sheet 240 and / or the liquid crystal display panel 100.

[0060] The backlight reflector 230 includes a through-hole 230h that overlaps with and is aligned with the sensing area HA of the liquid crystal display panel 100. The backlight sheet 240 includes a aperture 240h that overlaps with and is aligned with the sensing area HA of the liquid crystal display panel 100. The bottom cover 250 includes a cover aperture 250h that overlaps with and is aligned with the sensing area HA of the liquid crystal display panel 100. The first base substrate 241s and the second base substrate 242s of the backlight sheet 240 may not overlap with the sensing area HA of the liquid crystal display panel 100, but may instead form the boundary of the aperture 240h and / or the sensing area HA.

[0061] The optical module 300 detects external light or is capable of capturing images via the liquid crystal display panel 100 and the backlight unit 200. For example, the optical module 300 may include at least one of a camera or an IR sensor. The optical module 300 is located below the backlight unit 200. The optical module 300 is adhered to or otherwise attached to the bottom surface 250B of the bottom cover 250 by adhesive tape 400. However, this disclosure is not limited thereto. The optical module 300 may also be fastened to the rear surface of the bottom cover 250 by fasteners (e.g., screws or bolts).

[0062] Therefore, since the backlight reflector 230 includes a through-hole 230h overlapping the sensing area HA and the backlight sheet 240 includes a sheet hole 240h overlapping the sensing area HA, light emitted by the backlight element 210 may not be supplied to the sensing area HA of the liquid crystal display panel 100. Even if light emitted by the backlight element 210 is supplied to the sensing area HA of the liquid crystal display panel 100, the intensity of the light supplied to the sensing area HA may be less than the intensity of the light supplied to the active area AA of the liquid crystal display panel 100 other than the sensing area HA. ​​In other words, the area of ​​the display device 10 including the sensing area HA may be invisible to the user because there are no pixels at that location and no light is emitted from the sensing area HA. ​​Any light passing through the sensing area HA from the backlight element 210 will have lower brightness or less intensity than the light supplied by the active area AA. Therefore, a brightness deviation may occur between the active area AA and the sensing area HA of the liquid crystal display panel 100.

[0063] In one embodiment of this disclosure, the optical module 300 may further include a light source element that is capable of providing light to the sensing area HA of the liquid crystal display panel 100 separately from the backlight element 210, so as to overcome the brightness deviation at the sensing area HA and present uniform light to the user.

[0064] Figure 5 A diagram showing the detailed configuration of the optical module 300 in the display device 10.

[0065] like Figure 5As shown, the optical module 300 includes a housing 360 for accommodating the module light source element 310 (light source 310 or optical light source 310), visible light reflecting structure 320, infrared light transmitting structure 330, module sheet 340 (optical sheet), optical element 350, and other aspects of the optical module 300 described below. The housing 360 secures or connects the aspects of the optical module 300 together and protects it from external impacts.

[0066] The visible light reflecting structure 320 and the infrared light transmitting structure 330 each include inclined surfaces 321 and 331. The inclined surfaces 321 of the visible light reflecting structure 320 and 331 of the infrared light transmitting structure 330 are arranged to face each other. The inclined surfaces 321 of the visible light reflecting structure 320 and 331 of the infrared light transmitting structure 330 overlap with the sensing area HA of the liquid crystal display panel 100. The visible light reflecting structure 320 and the infrared light transmitting structure 330 can be formed of the same material as the backlight guide plate 220 of the backlight unit 200 or a different material.

[0067] The module chip 340 is disposed between the inclined surface 321 of the visible light reflecting structure 320 and the inclined surface 331 of the infrared light transmitting structure 330. The module chip 340 reflects light emitted from the module light source element 310 to the sensing area HA of the liquid crystal display panel 100. Furthermore, the module chip 340 can transmit external light applied through the sensing area HA of the liquid crystal display panel 100. The detailed configuration of the module chip 340 will be described later.

[0068] The module light source element 310 is located on a side surface 320S of the visible light reflecting structure 320, which can be either the left or right side surface. The module light source element 310 is located outside the sensing area HA of the liquid crystal display panel 100. The side surface 320S of the visible light reflecting structure 320, where the module light source element 310 is located, is perpendicular to the upper surface 320U of the visible light reflecting structure 320 facing the backlight guide plate 220. Therefore, in the display device 10, light emitted from the module light source element 310 can be supplied to the sensing area HA of the liquid crystal display panel 100 through the module sheet 340 located on the inclined surface 321 of the visible light reflecting structure 320, as schematically shown by the dashed arrow 323. Specifically, the module light source element 310 emits light that is reflected by the module sheet 340 and emitted through the sensing area HA to improve the brightness and intensity of the light at the sensing area HA and overcome the aforementioned brightness difference. The angle of module 340 is selected to direct light toward and reflect it through the sensing area HA and the apertures 230h, 240h, and 250h aligned with the sensing area HA. ​​As described below, the inclined surfaces 321 and 331 may have the same angle as module 340 because the inclined surfaces 321 and 331 are directly adjacent to and positioned at the interface with module 340, and / or the layers of module 340 may be coated on the inclined surfaces 321 and 331.

[0069] The modular light source element 310 includes a modular circuit board 311 and a plurality of modular light sources 312. Each modular light source 312 is a self-emissive element capable of generating and emitting light. For example, each modular light source 312 may include an LED. The modular light source 312 may be the same element as the backlight 212 or a different element. Each modular light source 312 is mounted on one end face 311E of the modular circuit board 311. The modular circuit board 311 is fixed to the housing 360 by adhesive or fasteners.

[0070] The module light source 312 can be turned on / off simultaneously. The module light source 312 can be driven simultaneously with the backlight 212. For example, in the display device 10, the liquid crystal display panel 100 uses light emitted from the backlight element 210 and light emitted from the module light source element 310 to display images. That is, as described above, in the display device 10, when the liquid crystal display panel 100 displays an image, light emitted from the module light source element 310 can be supplied to the sensing area HA of the liquid crystal display panel 100. Therefore, in the display device 10, when the liquid crystal display panel 100 displays an image, the light supplied to the sensing area HA can have substantially the same brightness as the light supplied to the active area AA due to reflection from the optical module 300 and the optical sheet 340. Therefore, in the display device 10, image quality degradation caused by brightness deviation between the active area AA and the sensing area HA can be prevented.

[0071] In the display device 10, external light applied through the sensing area HA of the liquid crystal display panel 100 can pass through the aperture 240h of the backlight sheet 240, the through hole 230h of the backlight reflector 230, and the cover hole 250h of the bottom cover 250. The external light that has passed through them can reach the optical module 300.

[0072] The module 340 is disposed between the inclined surface 321 of the visible light reflecting structure 320 and the inclined surface 331 of the infrared light transmitting structure 330.

[0073] The inclined surface 321 of the visible light reflecting structure 320 and the inclined surface 331 of the infrared light transmitting structure 330 are arranged to face each other, and the module sheet 340 is disposed between the inclined surface 321 of the visible light reflecting structure 320 and the inclined surface 331 of the infrared light transmitting structure 330. Therefore, external light applied through the sensing area HA of the liquid crystal display panel 100 can pass through the inclined surface 321 of the visible light reflecting structure 320, the module sheet 340, and the inclined surface 331 of the infrared light transmitting structure 330, thereby allowing the optical element 350 to sense external light. As described below, the module sheet 340 can reflect light below a specific wavelength, such as visible light from the module light source element 310, while transmitting higher wavelength light, such as infrared light. In this way, the optical element 350 can sense external infrared light, while the visible light emitted from the module light source element 310 is guided to the user to resolve the aforementioned brightness difference.

[0074] Therefore, in the display device 10, external light supplied to the optical element 350 is not refracted and / or diffused by the backlight 240. That is, in the display device 10, external light can be detected by the optical element 350 without distortion due to the backlight 240. Therefore, the display device 10 can have improved external light detection characteristics, and the optical element 350 can be positioned below the active area of ​​the display device 10 to reduce the bezel size without correspondingly reducing the brightness at the sensing area HA.

[0075] Optical element 350 includes elements capable of detecting external light. For example, optical element 350 may include a camera and / or an IR sensor. Optical element 350 is disposed below the inclined surface 321 of visible light reflecting structure 320, the inclined surface 331 of infrared light transmitting structure 330, and module piece 340. Optical element 350 is fixed inside housing 360.

[0076] The housing 360 has an opening 325 in the area overlapping with the sensing area HA of the liquid crystal display panel 100. For example, the housing 360 includes an opening 325 that overlaps and aligns with the through-hole 230h of the backlight reflector 230, the sheet hole 240h of the backlight sheet 240, and the cover hole 250h of the bottom cover 250. In some embodiments, each of the opening 325 and the holes 230h, 240h, and 250h has the same size and shape. In some embodiments, at least one or all of the opening 325 and the holes 230h, 240h, and 250h have different sizes and shapes from each other.

[0077] The housing 360 is adhered to the rear surface or bottom surface 250B of the base cover 250 by adhesive tape 400. However, this disclosure is not limited thereto. The optical module 300 can be fastened to the rear surface of the base cover 250 by fasteners such as screws.

[0078] Furthermore, the side surface 320S where the module light source element 310 of the visible light reflecting structure 320 is located may have an inclined surface, or may be inclined relative to the vertical and / or horizontal bottom surface of the housing 360, instead of as shown below. Figure 5 The vertical bottom surface is shown and is perpendicular to the horizontal bottom surface of the housing at 360 degrees.

[0079] Figure 6 This diagram illustrates the configuration of the module light source element 310-1 and the visible light reflection structure 320-1 of an optical module 300-1 according to one embodiment of the present disclosure. The remaining configuration of the optical module 300-1, excluding the module light source element 310-1 and the visible light reflection structure 320-1, is similar to... Figure 5 The configurations described herein are the same, and duplicate descriptions are omitted.

[0080] Continue to refer to Figure 5 In such cases Figure 6 As shown, optical modules 300 and 300-1 include module light source elements 310 and 310-1; visible light reflection structures 320 and 320-1; infrared light transmission structure 330; module sheet 340; optical element 350; and housing 360 for accommodating and fixing them and protecting them from external impacts.

[0081] The visible light reflecting structures 320 and 320-1 and the infrared light transmitting structure 330 may each include inclined surfaces 321 and 331. The inclined surfaces 321 of the visible light reflecting structures 320 and 320-1 and the infrared light transmitting structure 330 may be arranged to face each other. The inclined surfaces 321 of the visible light reflecting structures 320 and 320-1 and the infrared light transmitting structure 330 may overlap with the sensing area HA of the liquid crystal display panel 100. The visible light reflecting structures 320 and 320-1 and the infrared light transmitting structure 330 may be formed of the same material as the backlight guide plate 220 of the backlight unit 200. Figure 6 As shown, in module 300-1, the side surface 320S-1 where the module light source element 310-1 of the visible light reflecting structure 320-1 is located has an inclined surface 322. The inclined surface 322 forms an angle θ2 with respect to the horizontal plane, and the angle θ2 can be any value from 0 degrees to 90 degrees and excluding 0 degrees and 90 degrees. The angle θ2 of the inclined surface 322 of the visible light reflecting structure 320-1 is preferably greater than the angle θ1 of the inclined surface 321 of the visible light reflecting structures 320 and 320-1 with respect to the horizontal plane, but in some embodiments it can be the same as or less than the angle θ1. The angle θ1 can also be any value from 0 degrees to 90 degrees and excluding 0 degrees and 90 degrees.

[0082] The tilted surface or tilted surface 322 facing the modular light source element 310-1 allows for further variation and optimization of light extraction and brightness in the sensing area HA. ​​In some embodiments, the modular light source element 310-1 may be arranged relative to the horizontal plane at the same angle θ2 as the tilted surface 322, such that the modular light source element 310-1 is aligned with the maximum possible surface area of ​​the tilted surface or tilted surface 322 and emits all light directly toward the maximum possible surface area of ​​the tilted surface or tilted surface 322 to further improve, enhance, and / or optimize brightness. In some applications, the modular light source element 310-1 may also be arranged at different selected angles from 0 degrees to 90 degrees, excluding 0 degrees and 90 degrees.

[0083] The module chip 340 can be located between the inclined surface 321 of the visible light reflecting structure 320-1 and the inclined surface 331 of the infrared light transmitting structure 330. The module chip 340 can reflect light emitted from the module light source element 310-1 to the sensing area HA of the liquid crystal display panel 100. In addition, the module chip 340 can transmit external light applied through the sensing area HA of the liquid crystal display panel 100. The detailed configuration of the module chip 340 will be described later.

[0084] The module light source element 310-1 is located on or facing the inclined surface 322 of the visible light reflecting structure 320-1. Therefore, in an embodiment of the display device 10 including the optical module 300-1, light emitted from the module light source element 310-1 can be supplied to the sensing area HA of the liquid crystal display panel 100 through the module sheet 340 disposed on the inclined surface 321 of the visible light reflecting structure 320-1.

[0085] The modular light source element 310-1 includes a modular circuit board 311-1 and a plurality of modular light sources 312-1. Each modular light source 312-1 can be a self-emissive element capable of generating and emitting light. For example, each modular light source 312-1 may include an LED. The modular light source 312-1 can be the same element as the backlight 212. Each modular light source 312-1 can be mounted on one end of the modular circuit board 311-1. The modular circuit board 311-1 can be secured to the housing 360 by an adhesive or fastening device (such as those described herein).

[0086] The module light source 312-1 can be turned on / off simultaneously. The module light source 312-1 can be driven simultaneously with the backlight element 210. For example, in the display device 10 incorporating the optical module 300-1, the liquid crystal display panel 100 can display an image using light emitted from the backlight element 210 and light emitted from the module light source element 310-1. That is, in the display device according to some embodiments, when the liquid crystal display panel 100 displays an image, light emitted from the module light source element 310-1 can be supplied to the sensing area HA of the liquid crystal display panel 100. Therefore, in the display device according to some embodiments of the present disclosure, when the liquid crystal display panel 100 displays an image, the light supplied to the sensing area HA can have substantially the same brightness as the light supplied to the active area AA. Therefore, in the display device according to some embodiments of the present disclosure, image quality degradation caused by brightness deviation between the active area AA and the sensing area HA can be prevented.

[0087] In some embodiments of the display device according to this disclosure, external light applied through the sensing area HA of the liquid crystal display panel 100 can pass through the aperture 240h of the backlight sheet 240, the through hole 230h of the backlight reflector 230, and the cover hole 250h of the bottom cover 250. The external light that has passed through them can reach the optical module 300-1.

[0088] The module 340 can be disposed between the inclined surface 321 of the visible light reflecting structure 320-1 and the inclined surface 331 of the infrared light transmitting structure 330.

[0089] The inclined surface 321 of the visible light reflecting structure 320-1 and the inclined surface 331 of the infrared light transmitting structure 330 can be arranged to face each other, and the module sheet 340 can be disposed between the inclined surface 321 of the visible light reflecting structure 320-1 and the inclined surface 331 of the infrared light transmitting structure 330. Therefore, external light applied through the sensing area HA of the liquid crystal display panel 100 can pass through the inclined surface 321 of the visible light reflecting structure 320-1, the module sheet 340, and the inclined surface 331 of the infrared light transmitting structure 330, thereby allowing the optical element 350 to sense external light.

[0090] Therefore, in the display device 10, external light supplied to the optical element 350 is not refracted and / or diffused by the backlight 240. That is, in the display device 10, external light can be detected by the optical element 350 without distortion due to the backlight 240. Therefore, the display device 10 can have improved external light detection characteristics.

[0091] Optical element 350 may include elements capable of detecting external light. For example, optical element 350 may include a camera and an IR sensor. Optical element 350 may be disposed below the inclined surface 321 of the visible light reflecting structure 320-1, the inclined surface 331 of the infrared light transmitting structure 330, and the module piece 340. Optical element 350 may be fixed inside the housing 360.

[0092] The housing 360 may have an opening in an area overlapping with the sensing area HA of the liquid crystal display panel 100. For example, the housing 360 may include an opening overlapping with the through hole 230h of the backlight reflector 230, the sheet hole 240h of the backlight sheet 240, and the cover hole 250h of the bottom cover 250.

[0093] The housing 360 can be adhered to the rear surface of the bottom cover 250 by adhesive tape 400. However, this disclosure is not limited thereto. The optical module 300 can be fastened to the rear surface of the bottom cover 250 by fastening means such as screws.

[0094] Figure 7 A diagram showing the detailed configuration of the module chip 340 of the optical module 300 of the display device 10, and Figure 8 A graph illustrating the transmittance of module 340 according to one or more embodiments of the present disclosure.

[0095] like Figure 7 As shown, the module sheet 340 is configured such that the high refractive index material 341 and the low refractive index material 342 are repeatedly arranged in tens to hundreds of thin layers. The high refractive index material 341 may include titanium oxide (TiO2), tantalum oxide (Ta2O5), and / or zirconium oxide (ZrO2) with a refractive index of 2.4 to 2.6.

[0096] The low refractive index material 342 may include silicon dioxide (SiO2) or magnesium fluoride (MgF2) with a refractive index of 1.38 to 1.46. For refractive index materials 341 and 342, the terms "high" and "low" are related, such that the material chosen for the high refractive index material is greater than the material chosen for the low refractive index material 342. For example... Figure 7 As shown, module 340 is a stack in which high refractive index material 341 and low refractive index material 342 are stacked on each other alternately and repeatedly and are in direct contact with each other.

[0097] like Figure 8 As shown, the module chip 340 configured in this way can reflect or transmit light depending on the wavelength of the light incident on the module chip 340. For example, when the wavelength of the light incident on the module chip 340 is 900 nm or less, the module chip 340 reflects the incident light. Conversely, when the wavelength of the light incident on the module chip 340 is 900 nm or greater, the module chip 340 transmits 90% or more of the incident light. Therefore, the module chip 340 according to one embodiment of this disclosure can reflect visible light and transmit infrared light, which allows the emitted visible light to be directed to the user to improve brightness, while allowing external infrared light to pass through the module chip 340 to reach the optical element 350 and be captured by the optical element 350.

[0098] Furthermore, in the display device 10, the module piece 340 of the optical module 300 may not be provided separately, or may not be a separate structure. For example, Figure 5 and Figure 6 The illustration shows a module 340 disposed between the inclined surface 321 of the visible light reflecting structure 320 and the inclined surface 331 of the infrared light transmitting structure 330, but the present disclosure is not limited thereto, and the module 340 may be formed as part of the visible light reflecting structure 320 and / or the infrared light transmitting structure 330.

[0099] For reference Figure 7 The high refractive index material 341 and the low refractive index material 342 can be repeatedly coated in tens to hundreds of thin layers on the inclined surface 321 of the visible light reflecting structure 320 and / or the inclined surface 331 of the infrared light transmitting structure 330.

[0100] Therefore, when the high refractive index material 341 and the low refractive index material 342 are coated on the inclined surface 321 of the visible light reflecting structure 320 or the inclined surface 331 of the infrared light transmitting structure 330, the light emitted from the module light source element 310 can be reflected by the inclined surface 321 of the visible light reflecting structure 320 and / or the inclined surface 331 of the infrared light transmitting structure 330, and supplied to the sensing area HA of the liquid crystal display panel 100 and emitted through the sensing area HA of the liquid crystal display panel 100. Furthermore, when the inclined surface 321 of the visible light reflecting structure 320 and / or the inclined surface 331 of the infrared light transmitting structure 330 are coated with the high refractive index material 341 and the low refractive index material 342, external light applied through the sensing area HA of the liquid crystal display panel 100 can pass through the inclined surface 321 of the visible light reflecting structure 320 and / or the inclined surface 331 of the infrared light transmitting structure 330 and reach the optical element 350.

[0101] Furthermore, in a display device according to one or more embodiments of the present disclosure, the infrared light transmission structure 330 may be omitted. Figure 5 and Figure 6 The infrared light transmission structure 330 is shown to be configured such that the inclined surface 321 of the visible light reflection structure 320 and the inclined surface 331 of the infrared light transmission structure 330 face each other, but this disclosure is not limited thereto. For example, the inclined surface 321 of the visible light reflection structure 320 may include a dichroic mirror. Furthermore, a module sheet 340 may be disposed on the inclined surface 321 of the visible light reflection structure 320, or a high refractive index material 341 and a low refractive index material 342 may be repeatedly coated on the inclined surface 321 of the visible light reflection structure 320 in tens to hundreds of thin layers (e.g., ...). Figure 7 (as shown), and the infrared light transmission structure 330 can be omitted.

[0102] Therefore, in an embodiment where the tilted surface 321 of the visible light reflecting structure 320 includes a dichroic mirror, the module sheet 340 is disposed on the tilted surface 321 of the visible light reflecting structure 320, and / or a high refractive index material 341 and a low refractive index material 342 are repeatedly coated on the tilted surface 321 of the visible light reflecting structure 320. Thus, light emitted from the module light source element 310 can be reflected by the tilted surface 321 of the visible light reflecting structure 320 and / or the module sheet 340 and supplied to the sensing area HA of the liquid crystal display panel 100, and external light applied through the sensing area HA of the liquid crystal display panel 100 can pass through the tilted surface 321 of the visible light reflecting structure 320 and reach the optical element 350.

[0103] Therefore, a display device according to one or more embodiments of the present disclosure may include a liquid crystal display panel 100 located on the upper surface of the backlight guide plate 220 and an optical module 300 located on the lower surface of the backlight guide plate 220. Furthermore, the liquid crystal display panel 100 may include a sensing area HA for detecting external light, and the optical module 300 may include an inclined surface 321 of a visible light reflecting structure 320 and an inclined surface 331 of an infrared light transmitting structure 330 overlapping the sensing area HA, a module sheet 340 disposed between the inclined surface 321 of the visible light reflecting structure 320 and the inclined surface 331 of the infrared light transmitting structure 330, and a module light source element 310 located on the side surface of the visible light reflecting structure 320. Therefore, in a display device according to one or more embodiments of the present disclosure, when the liquid crystal display panel 100 displays an image, the light supplied to the sensing area HA of the liquid crystal display panel 100 by the module light source element 310, which is turned on / off simultaneously with the backlight element 210, may have the same brightness as the light supplied to the active area AA of the liquid crystal display panel 100. Furthermore, in the display device according to one or more embodiments of the present disclosure, when the liquid crystal display panel 100 is not displaying an image, external light applied through the sensing area HA of the liquid crystal display panel 100, the backlight guide plate 220, the tilted surface 321 of the visible light reflecting structure 320, the module sheet 340, and the tilted surface 331 of the infrared light transmitting structure 330 can be detected by the optical element 350. Therefore, in the display device according to one or more embodiments of the present disclosure, external light can be detected without degrading the image quality.

[0104] A display device according to one or more embodiments of the present disclosure is described as having an optical element 350 including a camera and an IR sensor. However, in a display device according to one or more other embodiments of the present disclosure, the optical element 350 may include a wide variety of elements. For example, in a display device according to one embodiment of the present disclosure, the optical element 350 may include one of a camera and an IR sensor. Furthermore, in a display device according to one embodiment of the present disclosure, the optical element 350 may also include at least one of a wide variety of sensors. For example, in a display device according to one embodiment of the present disclosure, the optical element 350 may include at least one of a motion sensor, an illuminance sensor, and an ultrasonic sensor. Therefore, in a display device according to one embodiment of the present disclosure, the freedom of configuration of the optical element 350 can be improved.

[0105] A display device according to one or more embodiments of the present disclosure has been described as having a modular light source 312 having the same elements as the backlight 212. In a display device according to one embodiment of the present disclosure, the type and number of the modular light sources 312 can be determined based on the brightness of the light supplied from the backlight 212 to the active area AA of the liquid crystal display panel 100. Furthermore, in a display device according to one embodiment of the present disclosure, the type and number of the modular light sources 312 can be determined based on the area ratio of the active area AA to the sensing area HA of the liquid crystal display panel 100. That is, in a display device according to one embodiment of the present disclosure, when the liquid crystal display panel 100 displays an image, the type and number of the modular light sources 312 can be adjusted so that the brightness of the light supplied to the sensing area HA of the liquid crystal display panel 100 is substantially the same as the brightness of the light supplied to the active area AA of the liquid crystal display panel 100. Therefore, in a display device according to one embodiment of the present disclosure, image quality degradation caused by brightness deviation between the active area AA and the sensing area HA of the liquid crystal display panel 100 can be effectively prevented.

[0106] As is apparent from the above description, the display device according to the concept of this disclosure has the following effects.

[0107] First, since the second light source element of the optical module can be used to provide backlight to the sensing area, the brightness deviation between the active area and the sensing area of ​​the liquid crystal display panel can be minimized and / or eliminated.

[0108] Secondly, since the backlight reflector includes a through hole overlapping the sensing area of ​​the liquid crystal display panel, the backlight sheet includes a sheet hole overlapping the sensing area of ​​the liquid crystal display panel, and the bottom cover includes a cover hole overlapping the sensing area of ​​the liquid crystal display panel, the optical module can detect external light through the sensing area of ​​the liquid crystal display panel without degrading the image quality.

[0109] Third, since the optical components are located below the housing and display panel, rather than outside or next to the display panel, the bezel can be reduced, or in other words, the size of the bezel can be reduced.

[0110] The benefits and advantages of the implementation scheme are not limited to those described above, and it should be understood that a variety of other benefits and advantages are covered by this disclosure.

[0111] The above disclosure is not limited to the above embodiments and figures, and it will be apparent to those skilled in the art that various substitutions, modifications and alterations are possible without departing from the technical spirit of the disclosure.

[0112] Based on the detailed description above, these and other changes can be made to the embodiments. Generally, the terminology used in the appended claims should not be construed as limiting the claims to the specific embodiments disclosed in the specification and claims, but should be interpreted to include all possible embodiments and the full scope of equivalents to which such claims are entitled. Therefore, the claims are not limited by this disclosure.

Claims

1. A display device, comprising: Backlight, the backlight comprising a light guide plate and a first light source; A liquid crystal display panel, the liquid crystal display panel being located on the upper surface of the light guide plate and including a sensing area; and An optical module, located on the lower surface of the light guide plate, includes a reflective structure with an inclined surface, a second light source, a module sheet, and optical elements. The inclined surface of the reflective structure overlaps with the sensing area of ​​the liquid crystal display panel, and The second light source and the optical element are located on different surfaces of the reflective structure or face different surfaces of the reflective structure.

2. The display device according to claim 1, wherein the second light source is located outside the sensing area.

3. The display device according to claim 1, wherein the module chip and the optical element overlap the sensing area.

4. The display device of claim 1, wherein the backlight further includes a bottom cover configured to accommodate the light guide plate and the first light source. The bottom cover includes a cover hole that overlaps with the sensing area.

5. The display device according to claim 1, wherein the optical module further comprises a transmission structure having an inclined surface, and The inclined surfaces of the reflective structure and the inclined surfaces of the transmissive structure are arranged to face each other.

6. The display device according to claim 5, wherein the module is disposed between the inclined surface of the reflective structure and the inclined surface of the transmissive structure.

7. The display device of claim 5, wherein the optical module further comprises a housing configured to accommodate the reflective structure, the second light source, the module sheet, the optical element, and the transmission structure. The housing has an opening in the portion that overlaps with the sensing area.

8. The display device according to claim 1, wherein the module is a stack of alternating high-refractive-index and low-refractive-index materials.

9. The display device according to claim 8, wherein the high refractive index material comprises at least one of titanium oxide, tantalum oxide, or zirconium oxide, and The low refractive index material mentioned above includes silicon dioxide or magnesium fluoride.

10. The display device according to claim 1, wherein the backlight further comprises: The backlight sheet located above the light guide plate; and The backlight reflector is located below the light guide plate. The backlight sheet includes a through-hole configured to overlap with the sensing area.

11. A display device, comprising: Backlight, the backlight comprising a light guide plate and a first light source; A liquid crystal display panel, the liquid crystal display panel being located on the upper surface of the light guide plate and including a sensing area; and An optical module, located on the lower surface of the light guide plate, includes a reflective structure with an inclined surface, a second light source, and optical elements. The inclined surface of the reflective structure overlaps with the sensing area of ​​the liquid crystal display panel.

12. The display device according to claim 11, wherein the tilted surface of the reflective structure comprises a dichroic mirror.

13. The display device according to claim 11, wherein the optical module further comprises a module sheet disposed on the inclined surface of the reflective structure.

14. The display device according to claim 13, wherein the module comprises layers of repeatedly disposed high-refractive-index material and low-refractive-index material.

15. The display device of claim 14, wherein the high refractive index material comprises at least one of titanium oxide, tantalum oxide, or zirconium oxide, and The low refractive index material mentioned above includes silicon dioxide or magnesium fluoride.

16. The display device of claim 13, wherein the optical module further comprises a housing configured to accommodate the reflective structure, the second light source, the module plate, and the optical element. The housing has an opening in the portion that overlaps with the sensing area.

17. The display device of claim 11, wherein the backlight further comprises a bottom cover configured to accommodate the light guide plate and the first light source. The bottom cover includes a cover hole that overlaps with the sensing area.

18. A display device, comprising: Backlight; A liquid crystal display panel, wherein the liquid crystal display panel is disposed on the backlight and has a sensing area; and An optical module located below the liquid crystal display panel, the optical module including a tilted surface in the layer of the optical module overlapping with the sensing area.

19. The display device according to claim 18, wherein the layer is a visible light reflective layer or an infrared light transmittance layer.

20. The display device according to claim 18, further comprising: The module sheet on the inclined surface, wherein the module sheet is a stack of layers of repeated and alternating layers of high refractive index material and low refractive index material, and is configured to reflect visible light and transmit infrared light.

Images