Display panel and personal immersive device including the same

Abstract

One embodiment discloses a display panel and a display device including the same, the display panel including: a substrate; a plurality of pixels disposed on the substrate, the plurality of pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel; the reflecting layer comprises a first reflecting part arranged on the first sub-pixel, a second reflecting part arranged on the second sub-pixel and a third reflecting part arranged on the third sub-pixel, and the thicknesses of the first reflecting part, the second reflecting part and the third reflecting part are different.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority and benefit of Korean Patent Application No. 10 - 2023 - 0195347, filed on December 28, 2023, the disclosure of which is incorporated herein by reference in its entirety. Technical field

[0003] This specification relates to a display panel and a personal immersive device including the display panel. Background art

[0004] Various types of personal immersive devices are being developed, such as, for example, head - mounted display (HMD) devices, face - mounted display (FMD) devices, eyeglass - mounted display (EGD) devices, etc. Personal immersive devices are classified into virtual reality (VR) devices and augmented reality (AR) devices.

[0005] In recent years, personal immersive devices have adopted a polarization - based optical system to shorten the distance between the user's eyes and the display panel. However, the polarization - based optical system has a problem in that only a part of the light passes through the polarizer, resulting in a decrease in brightness. Summary of the invention

[0006] One embodiment of this specification aims to provide a display panel with improved brightness and a personal immersive device including the display panel.

[0007] The technical problems to be solved by this specification are not limited to the above - mentioned technical problems, and those skilled in the art can clearly understand other technical problems not mentioned from the following description.

[0008] A display panel according to one aspect of the present disclosure includes: a substrate; a plurality of pixels including a first sub - pixel, a second sub - pixel, and a third sub - pixel disposed on the substrate; and a reflective layer including a first reflective portion disposed on the first sub - pixel, a second reflective portion disposed on the second sub - pixel, and a third reflective portion disposed on the third sub - pixel, wherein the thicknesses of the first reflective portion to the third reflective portion are different.

[0009] The first reflective portion may be thicker than the second reflective portion, and the second reflective portion may be thicker than the third reflective portion.

[0010] The first reflective portion to the third reflective portion may include cholesteric liquid crystal, and the pitches of the cholesteric liquid crystal included in the first reflective portion to the third reflective portion may be different.

[0011] The first reflective portion can selectively transmit and reflect red light corresponding to the pitch of the cholesteric liquid crystal, the second reflective portion can selectively transmit and reflect green light corresponding to the pitch of the cholesteric liquid crystal, and the third reflective portion can selectively transmit and reflect blue light corresponding to the pitch of the cholesteric liquid crystal.

[0012] The display panel may further include color filters disposed between the plurality of pixels and the reflective layer. Among them, the color filters may include a first color filter disposed between the first sub-pixel and the first reflective portion, a second color filter disposed between the second sub-pixel and the second reflective portion, and a third color filter disposed between the third sub-pixel and the third reflective portion.

[0013] The thickness of the first color filter may be less than the thickness of the second color filter, and the thickness of the second color filter may be less than the thickness of the third color filter.

[0014] The display panel may further include a encapsulation layer disposed between the plurality of pixels and the reflective layer. Among them, the encapsulation layer may include a first encapsulation portion disposed between the first sub-pixel and the first reflective portion, a second encapsulation portion disposed between the second sub-pixel and the second reflective portion, and a third encapsulation portion disposed between the third sub-pixel and the third reflective portion. The thickness of the second encapsulation portion may be greater than the thickness of the first encapsulation portion, and the thickness of the third encapsulation portion may be greater than the thickness of the second encapsulation portion.

[0015] The display panel may further include an alignment film disposed between the reflective layer and the color filters.

[0016] The alignment film may include a first region disposed on the first color filter to the third color filter and a second region disposed on the sides of the second color filter and the third color filter.

[0017] The first sub-pixel, the second sub-pixel, and the third sub-pixel may emit light of different colors.

[0018] The first sub-pixel, the second sub-pixel, and the third sub-pixel may emit light of the same color.

[0019] The display panel may further include a condensing layer disposed between the plurality of pixels and the reflective layer. Among them, the condensing layer may include a high refractive index layer disposed on the first sub-pixel to the third sub-pixel and a low refractive index layer disposed on the high refractive index layer.

[0020] Each of the first sub-pixel, the second sub-pixel, and the third sub-pixel may include a first electrode, a light-emitting element disposed on the first electrode, and a second electrode disposed on the light-emitting element.

[0021] The light-emitting element may include an organic light-emitting element or an inorganic light-emitting element. Description of the Drawings

[0022] By describing exemplary embodiments of the present invention in detail with reference to the accompanying drawings, the above and other objects, features, and advantages of the present invention will become more apparent to those of ordinary skill in the art. In the drawings:

[0023] Figure 1 is a diagram schematically showing a personal immersive device;

[0024] Figure 2 is a diagram showing a display device according to an embodiment of the present disclosure;

[0025] Figure 3 and Figure 4 is a diagram showing that the size of the personal immersive device varies according to the lens type;

[0026] Figure 5 is a diagram showing a display panel structure for improving low brightness;

[0027] Figure 6 is a diagram showing a display panel according to a first embodiment of the present disclosure;

[0028] Figure 7 is a schematic diagram showing the process of increasing brightness through a cholesteric liquid crystal layer;

[0029] Figure 8 is a diagram showing a mismatch between the wavelength of light emitted from a color filter and the transmission wavelength of a reflective layer;

[0030] Figure 9 is a diagram showing a mismatch between the wavelength of light emitted from a light-emitting layer and the transmission wavelength of a reflective layer;

[0031] Figure 10 is a diagram showing a display panel according to a second embodiment of the present disclosure;

[0032] Figure 11 is a diagram showing a display panel according to a third embodiment of the present disclosure;

[0033] Figure 12 is a diagram showing a display panel according to a fourth embodiment of the present disclosure;

[0034] Figure 13 is a diagram showing a display panel according to a fifth embodiment of the present disclosure;

[0035] Figure 14 is a diagram showing a display panel according to a sixth embodiment of the present disclosure;

[0036] Figure 15 is a diagram showing a display panel according to a seventh embodiment of the present disclosure;

[0037] Figure 16It is a diagram showing a display panel according to an eighth embodiment of the present disclosure;

[0038] Figure 17 It is a diagram showing a display panel according to a ninth embodiment of the present disclosure;

[0039] Figures 18A to 18E It is a diagram showing a manufacturing process of a display panel according to an embodiment of the present disclosure;

[0040] Figure 19 It is a diagram showing a display panel according to a tenth embodiment of the present disclosure;

[0041] Figures 20A to 20C It is a diagram showing a manufacturing process of a display panel according to an embodiment of the present disclosure; and

[0042] Figure 21 It is an exploded perspective view of a personal immersive device according to an embodiment of the present disclosure. Detailed Description

[0043] With reference to the embodiments described in detail below in conjunction with the accompanying drawings, the advantages and features of the present disclosure and the methods for realizing them will become clear. However, the present disclosure is not limited to the embodiments described below, but can be implemented in various different forms. The embodiments are only used to completely disclose this specification and fully convey the scope of the present disclosure to those skilled in the art, and the present disclosure is only defined by the scope of the claims.

[0044] Since the shapes, sizes, ratios, angles, quantities, etc. disclosed in the drawings for describing the embodiments of the present disclosure are only exemplary, the present disclosure is not limited to the items shown in the drawings. Throughout the specification, the same reference numerals denote the same components. In addition, when describing the present disclosure, when it is determined that the detailed description of related known technologies may unnecessarily obscure the key points of the present disclosure, the detailed description thereof will be omitted.

[0045] When using expressions such as "provide", "include", "have", "consist of", etc. submitted in this specification, unless "only" is used, other parts can be added. Unless otherwise clearly stated, the case of components expressed in the singular form also includes the plural form.

[0046] When explaining components, even if there is no separate and clear description, it should be understood to include an error range.

[0047] When describing the positional relationship and interconnection relationship between two components, such as "on", "above", "below", "adjacent to", "connected or combined", "crossed or intersected", etc., unless "immediately" or "directly" is mentioned, one or more other components can be interposed between the two components.

[0048] In the case of describing temporal relationships such as "after", "immediately following", "then", "before", etc., unless "immediately" or "directly" is used, it may not be continuous on the time axis.

[0049] In the description of the embodiments, although the first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, within the technical concept of this specification, the first component mentioned below may also be the second component.

[0050] Throughout the specification, the same reference numerals denote the same components.

[0051] The features of the respective embodiments may be partially or wholly combined or combined with each other, and there may be various types of interconnections and drives technically, and the respective embodiments may be implemented independently of each other or implemented jointly in an associated relationship.

[0052] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the drawings.

[0053] Figure 1 is a diagram schematically showing a personal immersive device. Figure 2 is a diagram showing a display device according to an embodiment of the present disclosure.

[0054] Referring to Figure 1 and Figure 2 , the personal immersive device may include a main body 6 worn on a user's head and a display device 2 and a lens 4 accommodated in the main body 6, and the display device may include a first display panel 100A for displaying a left-eye image and a second display panel 100B for displaying a right-eye image.

[0055] The display panels 100A and 100B include data lines DL, gate lines GL, and pixels PX. The screens of the display panels 100A and 100B include a pixel array for displaying an image. The pixel array includes pixel lines L1 to Ln that are sequentially scanned by scan pulses translated in the scanning direction and thus written with pixel data.

[0056] The display panel driver may include data drivers 111 and 112, gate drivers 121 and 122, a controller 130, etc. For each of the display panels 100A and 100B, the data drivers 111 and 112 and the gate drivers 121 and 122 may be separate, and the controller 130 may be shared. The data drivers 111 and 112 convert the pixel data input from the controller 130 into a voltage or current and supply a data signal to the pixels. The gate drivers 121 and 122 sequentially output scan pulses synchronized with the data signals output from the data drivers 111 and 112 under the control of the controller 130.

[0057] Figure 3 and Figure 4 is a diagram showing that the size of the personal immersion device varies according to the lens type. Figure 5 is a diagram showing a display panel structure for improving low brightness.

[0058] Referring to Figure 3 when implementing a personal immersion device on the display device 10 using the Fresnel lens 41, a first distance h1 is required to focus the screen of the display device on the retina of the eye. On the other hand, when using a plurality of polarization-based lenses 42 and 43 as shown in Figure 4 , the retina of the eye can be focused at a second distance h2 shorter than the first distance h1. Therefore, for miniaturization, in a virtual reality (VR) device or an augmented reality (AR) device, a combination structure of the polarizer PO1 and the lenses 42 and 43 is preferably used. However, this polarization-based optical system only uses a part of the light passing through the polarizer, so it has the disadvantage of low brightness.

[0059] Referring to Figure 5 , the display panel can reduce the focal length by installing a circular polarizer 30 including a linear polarizer 31 and a quarter-wave plate 32 on the color filters CF1, CF2, and CF3. However, since the circular polarizer 30 only transmits a part of the circularly polarized light, the brightness is reduced. Therefore, in order to increase the brightness, a condensing layer 20 having a high refractive index layer 21 and a low refractive index layer 22 needs to be additionally provided to compensate for the brightness. However, when the condensing layer 20 is formed, brightness unevenness may occur due to process dispersion, and moiré patterns may be generated.

[0060] Figure 6 is a diagram showing a display panel according to the first embodiment of the present disclosure. Figure 7 is a schematic diagram showing the process of increasing brightness through a cholesteric liquid crystal layer. Figure 8 is a diagram showing a mismatch between the wavelength of light emitted from the color filter and the transmission wavelength of the reflection layer. Figure 9 is a diagram showing a mismatch between the wavelength of light emitted from the light-emitting layer and the transmission wavelength of the reflection layer.

[0061] Referring to Figure 6 , the display panel according to the present embodiment may include a substrate 110, pixels PX (including a plurality of sub-pixels SP1, SP2, and SP3) provided on the substrate 110, and a reflection layer 180 provided on the plurality of sub-pixels SP1, SP2, and SP3.

[0062] The substrate 110 may be manufactured based on glass, plastic, and silicon wafers. The substrate 110 may be understood as a backplane.

[0063] There is no specific limitation on the structure of multiple pixels PX. For example, the multiple pixels PX may include an organic light-emitting diode (OLED) element or an inorganic light-emitting diode (LED) element. The inorganic LED element can be used as a sub-pixel when micro-sized mini-LEDs emit light separately.

[0064] The multiple pixels may include a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3 to achieve multiple colors. The first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 can output light of different wavelength bands. For example, the first sub-pixel SP1 can output light in the red wavelength band, the second sub-pixel SP2 can output light in the green wavelength band, and the third sub-pixel SP3 can output light in the blue wavelength band. Each sub-pixel may include a light-emitting element layer and a circuit layer for driving the light-emitting element layer.

[0065] However, the present disclosure is not necessarily limited thereto, and the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 can all output light of the same wavelength band. For example, the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 can all output light in the white wavelength band. For this purpose, each of the sub-pixels SP1, SP2, and SP3 may have a structure in which a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer are stacked.

[0066] The color filter CF can be disposed on the multiple sub-pixels SP1, SP2, and SP3. The color filter CF may include a first color filter CF1 disposed on the first sub-pixel SP1, a second color filter CF2 disposed on the second sub-pixel SP2, and a third color filter CF3 disposed on the third sub-pixel SP3. According to this embodiment, a black matrix may not be provided between the color filters. However, the present disclosure is not necessarily limited thereto, and a black matrix may be provided between the color filters to prevent color mixing.

[0067] The first color filter CF1 may be a red color filter, the second color filter CF2 may be a green color filter, and the third color filter CF3 may be a blue color filter. Therefore, the light emitted by the first color filter CF1 may be red light, the light emitted by the second color filter CF2 may be green light, and the light emitted by the third color filter CF3 may be blue light.

[0068] According to this embodiment, the thicknesses of the first color filter CF1, the second color filter CF2, and the third color filter CF3 may be different. For example, the thickness d1 of the first color filter CF1 may be less than the thickness d2 of the second color filter CF2, and the thickness d2 of the second color filter CF2 may be less than the thickness d3 of the third color filter CF3.

[0069] That is to say, the third color filter CF3 can be manufactured to be the thickest, and the first color filter CF1 can be manufactured to be the thinnest. The first color filter CF1, the second color filter CF2, and the third color filter CF3 can be manufactured to have the same thickness, and then the thickness can be adjusted by a separate etching process. The etching process can apply various semiconductor etching processes. At this time, when the first color filter CF1 is the thinnest, since the performance of the color filter may decrease, the dye concentration can be increased to improve the performance. Therefore, the dye concentration in the first color filter CF1 can be higher than that in the second color filter CF2 and the third color filter CF3.

[0070] Referring Figure 6 and Figure 7 , an alignment film 170 can be formed on the first color filter CF1, the second color filter CF2, and the third color filter CF3. The alignment film 170 can be rubbed in one direction, so that the alignment angle of the liquid crystal formed on the alignment film 170 can be set according to the alignment direction.

[0071] The reflective layer 180 can include a first reflective portion 181 provided on the first color filter CF1, a second reflective portion 182 provided on the second color filter CF2, and a third reflective portion 183 provided on the third color filter CF3.

[0072] The reflective layer 180 can be made of cholesteric liquid crystal CLC. The cholesteric liquid crystal CLC forms a stacked structure similar to a smectic liquid crystal, and the long axes of the cholesteric liquid crystal molecules (CLM) are arranged parallel like nematic liquid crystals. The cholesteric liquid crystal CLC can form a helical structure because the alignment of the array continuously changes in the layer direction where the cholesteric liquid crystal molecules (CLM) are arranged, and can selectively reflect light with a wavelength corresponding to the pitch of the helix.

[0073] When cholesteric liquid crystal is coated on the first color filter CF1, the second color filter CF2, and the third color filter CF3 manufactured with different thicknesses, the first reflective portion 181 can be formed on the first color filter CF1, the second reflective portion 182 can be formed on the second color filter CF2, and the third reflective portion 183 can be formed on the third color filter CF3.

[0074] Since the cholesteric liquid crystal is filled in the color filter CF with a predetermined thickness, the upper surface S1 can be formed to have the same height. Therefore, the first reflective portion 181, the second reflective portion 182, and the third reflective portion 183 can be manufactured to have different thicknesses. The thickness d6 of the first reflective portion 181 formed on the first color filter CF1 set at the bottom can be greater than the thickness d5 of the second reflective portion 182 formed on the second color filter CF2, and the thickness d5 of the second reflective portion 182 can be greater than the thickness d4 of the third reflective portion 183.

[0075] Therefore, in the first reflective portion 181 which is made to be the thickest, the cholesteric liquid crystal can grow in a helical shape and has a pitch P1 that reflects light in the red wavelength band. In addition, in the second reflective portion 182 which is made to be thinner than the thickness of the first reflective portion 181, the cholesteric liquid crystal can grow in a helical shape and has a pitch P2 that reflects light in the green wavelength band. In addition, in the third reflective portion 183 which is made to be the thinnest, the cholesteric liquid crystal can grow in a helical shape and has a pitch P3 that reflects light in the blue wavelength band.

[0076] According to this embodiment, since the wavelength band in which the cholesteric liquid crystal reflects varies according to the pitch, the thickness of the reflective portion can be adjusted to reflect the light emitted from the color filter CF.

[0077] The pitch p of the helix can be a value obtained by dividing the wavelength λ of the light reflected from the front by the average refractive index n of the liquid crystal molecules. The average refractive index n of the liquid crystal molecules can be 1.5 to 1.7, which is the average of the extraordinary refractive index ne and the ordinary refractive index no.

[0078] The wavelength of red light can be 600 nm to 780 nm, the wavelength of green light can be 500 nm to 580 nm, and the wavelength of blue light can be 430 nm to 500 nm.

[0079] Therefore, when the wavelength of each color is divided by the average refractive index, the pitch p1 of the helix formed by the cholesteric liquid crystal molecules in the first reflective layer 181 can be 353 nm to 520 nm. The pitch p2 of the helix formed by the cholesteric liquid crystal molecules in the second reflective layer 182 can be 294 nm to 387 nm. The pitch p3 of the helix formed by the cholesteric liquid crystal molecules in the third reflective layer 183 can be 253 nm to 333 nm.

[0080] In a structure where the cholesteric liquid crystal molecules rotate counterclockwise along the rotation axis (which is the helical axis) and form a helix, left circularly polarized light can be reflected, and in a structure where the cholesteric liquid crystal molecules rotate clockwise and form a helix, right circularly polarized light can be reflected. Hereinafter, the cholesteric liquid crystal is described as transmitting right circularly polarized light (clockwise) and reflecting left circularly polarized light (counterclockwise), but the polarization direction of the reflected light can vary according to the helical shape.

[0081] The first reflection portion 181 can transmit the right circularly polarized light RL1 in the red light emitted by the first color filter CF1 and reflect the left circularly polarized light RL2 in the red light emitted by the first color filter CF1. Since the reflected light is reflected by the reflection plate RP or the substrate 110 disposed below the pixel, the polarization direction can be changed. For example, the left circularly polarized light RL2 reflected by the cholesteric liquid crystal can be repeatedly reflected by the reflection plate RP or the substrate 110, so that it can be changed into the right circularly polarized light RL3. Therefore, the reflected red light can pass through the first color filter CF1 and the first reflection portion 181 again, and can be emitted to the outside.

[0082] The second reflection portion 182 can transmit the right circularly polarized light in the green light emitted by the second color filter CF2 and reflect the left circularly polarized light in the green light emitted by the second color filter CF2. Since the reflected light is reflected by the reflection plate RP or the substrate 110 disposed below the pixel, the polarization direction is changed, and thus the reflected light can then pass through the second reflection portion 182.

[0083] The third reflection portion 183 can transmit the right circularly polarized light in the blue light emitted by the third color filter CF3 and reflect the left circularly polarized light in the blue light emitted by the third color filter CF3. Since the reflected light is reflected by the reflection plate RP or the substrate 110 disposed below the pixel, the polarization direction is changed, and thus the reflected light can pass through the third reflection portion 183.

[0084] According to this embodiment, the reflection portion selectively transmits and reflects the circularly polarized light incident from the cholesteric liquid crystal layer, so it can be applied to a polarization-based optical system. Therefore, miniaturization of the personal immersive device can be achieved. In addition, due to the cycle of changing the polarization direction by repeatedly reflecting and transmitting light, the amount of light emitted from the display panel is increased, so the brightness can be improved without a separate condensing layer.

[0085] Figure 8 It is a diagram showing a mismatch between the wavelength of the light emitted from the color filter and the transmission wavelength of the reflection layer. Figure 9 It is a diagram showing a mismatch between the wavelength of the light emitted from the light-emitting layer and the transmission wavelength of the reflection layer 180.

[0086] Refer to Figure 8 , the green color filter CFG1 can be thicker than the blue color filter CFB1, and the red color filter CFR1 can be thicker than the green color filter CFG1. Therefore, since the first reflection portion RR1 formed on the blue color filter CFB1 is formed to be relatively thick, the pitch is lengthened, so the first reflection portion RR1 can reflect the light in the red wavelength band. However, the problem is that the light passing through the blue color filter CFB1 is blue light, so it will not be reflected by the first reflection portion RR1. In addition, color mixing (L11 and L13) may occur in some areas.

[0087] Since the third reflective portion RB1 formed on the red color filter CFR1 is formed to be relatively thin, the pitch of the cholesteric liquid crystal is short, and thus the third reflective portion RB1 can reflect light in the blue wavelength band. Therefore, there is a problem that the red light passing through the red color filter CFR1 is not reflected by the third reflective portion RB1. In addition, color mixing may occur in some regions (L14 and L15).

[0088] Therefore, in order for the reflective layer to function as a polarizer that reflects a part of light and transmits a part of light, the red color filter should be made the thinnest so that the pitch of the cholesteric liquid crystal formed thereon can be lengthened to reflect red light. In addition, the blue color filter should be made the thickest so that the pitch of the cholesteric liquid crystal formed thereon can be relatively shortened to reflect blue light.

[0089] Referring to Figure 9 , when a step is formed in a separate optical layer, since the thickness of the first step portion ST1 provided on the red sub-pixel R2 is large, the thickness of the first reflective portion RB2 is relatively small, so the first reflective portion RB2 can have a pitch for reflecting blue light. Therefore, there is a problem that the light emitted from the red sub-pixel R2 is not reflected by the first reflective portion RB2.

[0090] On the other hand, since the thickness of the third step portion ST3 provided on the blue sub-pixel B2 is large, the thickness of the third reflective portion RR2 becomes relatively small, so the third reflective portion RR2 may have a pitch for reflecting red light. Therefore, there is a problem that the blue light emitted from the blue sub-pixel B2 is not reflected by the third reflective portion RR2.

[0091] Therefore, the red color filter should be formed to be the thinnest to form a cholesteric liquid crystal reflective layer that reflects red light thereon, and the blue color filter needs to be formed to be the thickest to form a cholesteric liquid crystal reflective layer that reflects blue light thereon.

[0092] Figure 10 is a diagram showing a display panel according to a second embodiment of the present disclosure. Figure 11 is a diagram showing a display panel according to a third embodiment of the present disclosure. Figure 12 is a diagram showing a display panel according to a fourth embodiment of the present disclosure.

[0093] Referring to Figure 10 , a plurality of sub-pixels SP1, SP2, and SP3 and a packaging layer 150 can be stacked on the substrate 110. Each of the plurality of sub-pixels SP1, SP2, and SP3 can include a circuit layer PC1 and a light-emitting element layer EP1.

[0094] The circuit layer PC1 includes a pixel circuit that drives the light-emitting elements of the sub-pixels SP1, SP2, and SP3 according to the pixel data of an input image. The circuit layer PC1 may further include a gate driving circuit that supplies a gate signal to the pixel circuit. The pixel circuit may include: a driving transistor that supplies current to the light-emitting element according to a gate-source voltage; a switching transistor that applies the data voltage of the pixel data to the gate or source of the driving transistor; a storage capacitor that maintains the gate-source voltage of the driving transistor; and a plurality of insulating layers that insulate the metal patterns of the circuit elements.

[0095] The light-emitting element layer EP1 includes light-emitting elements respectively disposed in the sub-pixels SP1, SP2, and SP3 and driven by the pixel circuit. The light-emitting element layer EP1 may be a white light-emitting element that is commonly disposed in the sub-pixels SP1, SP2, and SP3 and generates white light.

[0096] In another embodiment, a red light-emitting element that generates red light may be disposed in the first sub-pixel SP1, a green light-emitting element that generates green light may be disposed in the second sub-pixel SP2, and a blue light-emitting element that generates blue light may be disposed in the third sub-pixel SP3.

[0097] The light-emitting element may be implemented as an organic light-emitting element or an inorganic light-emitting element. For example, the light-emitting element may be implemented as an organic light-emitting diode (OLED) or an inorganic LED.

[0098] The first electrode 120 may be the anode of the light-emitting element separated for each sub-pixel. The second electrode 140 may be a common electrode shared by the sub-pixels. The second electrode 140 may be the cathode of the light-emitting element.

[0099] The encapsulation layer 150 may cover the light-emitting element layer EP1 to seal the circuit layer PC1 and the light-emitting element layer EP1. The encapsulation layer 150 may have a multi-layer insulating film structure in which an organic film and an inorganic film are alternately stacked. The inorganic film blocks the penetration of moisture or oxygen. The organic film planarizes the surface of the inorganic film. When the organic film and the inorganic film are stacked in multiple layers, since the movement path of moisture or oxygen is longer than that of a single layer, the penetration of moisture and oxygen affecting the light-emitting element layer EP1 can be effectively blocked.

[0100] The first electrode 120 may also be used as a reflective layer to improve the light efficiency, and the second electrode 140 may be implemented as a transparent or semi-transparent electrode. In a top-emission type display panel, the distance between the first electrode 120 and the second electrode 140 may be set differently for the colors of the sub-pixels SP1, SP2, and SP3 to obtain a microcavity effect. When the microcavity is utilized, since the light reflected between the electrodes 120 and 140 undergoes constructive interference, the wavelength size of the light increases, and thus the amount of light emitted to the outside in the top-emission type display panel can be increased.

[0101] The color filter CF, the alignment layer 170, and the reflective layer 180 may have the same structure as described above.

[0102] Referring to Figure 11 , the first electrode 120 may include driving electrodes 121b, 122b, and 123b disposed under the light-emitting element layer EP1, and reflective electrodes 121a, 122a, and 123a disposed under the driving electrodes 121b, 122b, and 123b, respectively. The driving electrodes 121b, 122b, and 123b may be used to apply a pixel driving voltage to the light-emitting element layer EP1. The driving electrodes 121b, 122b, and 123b may be formed as transparent electrodes or semi-transparent electrodes.

[0103] The reflective electrodes 121a, 122a, and 123a may be disposed at appropriate positions and spaced apart from the second electrode 140 to achieve a microcavity effect. The reflective electrodes 121a, 122a, and 123a may be respectively disposed between a plurality of insulating layers 121, 122, and 123 of the sub-pixels SP1, SP2, and SP3. The reflective electrodes 121a, 122a, and 123a may be made of a highly reflective metal such as silver (Ag) or aluminum (Al). The driving electrodes 121b, 122b, and 123b and the reflective electrodes 121a, 122a, and 123a may be electrically connected to each other through a via electrode (not shown).

[0104] The bank 160 may be disposed between the plurality of driving electrodes 121b, 122b, and 123b. The bank 160 may divide the plurality of sub-pixels SP1, SP2, and SP3. The light-emitting element layer EP1 may be continuously formed on the plurality of driving electrodes 121b, 122b, and 123b and the bank 160.

[0105] Referring to Figure 12 , a trench TC may be formed between the plurality of sub-pixels SP1, SP2, and SP3. Accordingly, the light-emitting element layer EP1 is cut off by the trench TC, thereby improving the leakage current LLC. This embodiment shows that the trench TC is filled with the bank 160, but is not necessarily limited thereto.

[0106] There is no specific limitation on the depth of the trench TC. For example, the trench TC may be formed to have a depth corresponding to the thickness of the bank 160. Alternatively, the trench TC may be formed only in a partial region of the insulating layers 121, 122, and 123.

[0107] Figure 13 FIG. is a diagram showing a display panel according to a fifth embodiment of the present disclosure.

[0108] Referring to Figure 13, the display panel according to the present embodiment may include a substrate 110, pixels PX (including a plurality of sub-pixels SP1, SP2, and SP3) disposed on the substrate 110, and a reflective layer 180 disposed on the plurality of sub-pixels SP1, SP2, and SP3.

[0109] The substrate 110 may be made of glass, plastic, silicon wafers, etc. The substrate 110 may be understood as a backplane.

[0110] There is no specific limitation on the structure of the plurality of pixels PX. For example, the plurality of pixels PX may include organic light-emitting diode (OLED) elements or inorganic light-emitting diode (LED) elements. The inorganic LED elements may be used as sub-pixels when the micro-sized mini-LEDs emit light separately.

[0111] The plurality of pixels may include a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3 to achieve multiple colors. The first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may output light of different wavelength bands. For example, the first sub-pixel SP1 may output light in the red wavelength band, the second sub-pixel SP2 may output light in the green wavelength band, and the third sub-pixel SP3 may output light in the blue wavelength band. Each sub-pixel may include a light-emitting element layer and a circuit layer for driving the light-emitting element layer.

[0112] However, the present disclosure is not necessarily limited thereto. The first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may all output light of the same wavelength band. For example, the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may all output light in the white wavelength band. To this end, each of the sub-pixels SP1, SP2, and SP3 may have a structure in which a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer are stacked.

[0113] The encapsulation layer 150 may cover the pixels to seal the circuit layer PC1 and the light-emitting element layer EP1. The encapsulation layer 150 may have a multi-layer insulating film structure in which an organic film and an inorganic film are alternately stacked. The inorganic film blocks the penetration of moisture or oxygen. The organic film planarizes the surface of the inorganic film. When the organic film and the inorganic film are stacked in multiple layers, since the moving path of moisture or oxygen is longer than that of a single layer, the penetration of moisture and oxygen affecting the light-emitting element layer EP1 can be effectively blocked.

[0114] The encapsulation layer 150 may include a first encapsulation portion 151, a second encapsulation portion 152, and a third encapsulation portion 153 having different thicknesses. For example, the first encapsulation portion 151 may be manufactured to have a thickness less than that of the second encapsulation portion 152, and the second encapsulation portion 152 may be manufactured to have a thickness less than that of the third encapsulation portion 153. Thus, the third encapsulation portion 153 may be manufactured to have the maximum thickness, and the first encapsulation portion 151 may be manufactured to have the minimum thickness. The first encapsulation portion 151, the second encapsulation portion 152, and the third encapsulation portion 153 may be manufactured to have the same thickness and then the thickness may be adjusted by a separate etching process. The etching process may apply various semiconductor etching processes.

[0115] The alignment layer 170 may be formed on the first encapsulation portion 151, the second encapsulation portion 152, and the third encapsulation portion 153. The alignment layer 170 may be rubbed in one direction, and thus, the alignment angle of the liquid crystal formed on the alignment layer 170 may be set according to the alignment direction.

[0116] The reflective layer 180 may include a first reflective portion 181 disposed on the first encapsulation portion 151, a second reflective portion 182 disposed on the second encapsulation portion 152, and a third reflective portion 183 disposed on the third encapsulation portion 153.

[0117] According to this embodiment, the reflective layer 180 may be made of cholesteric liquid crystal CLC. When cholesteric liquid crystal is coated on the first encapsulation portion 151, the second encapsulation portion 152, and the third encapsulation portion 153 manufactured with different thicknesses, the first reflective portion 181 having a first thickness may be formed on the first sub-pixel SP1, the second reflective portion 182 having a second thickness may be formed on the second sub-pixel SP2, and the third reflective portion 183 having a third thickness may be formed on the third sub-pixel SP3.

[0118] When the upper surfaces of the cholesteric liquid crystals are formed to be the same, the first reflective portion 181, the second reflective portion 182, and the third reflective portion 183 may be manufactured to have different thicknesses. The thickness of the first reflective portion 181 formed on the first encapsulation portion 151 disposed at the lowermost position may be greater than the thickness of the second reflective portion 182 formed on the second encapsulation portion 152, and the second reflective portion 182 may be thicker than the third reflective portion 183.

[0119] Thus, in the first reflective portion 181 manufactured to be the thickest, the cholesteric liquid crystal may grow in a spiral shape and have a pitch that reflects light in the red wavelength band. In addition, in the second reflective portion 182 manufactured to have a thickness smaller than that of the first reflective portion 181, the cholesteric liquid crystal may grow in a spiral shape and have a pitch that reflects light in the green wavelength band. In addition, in the third reflective portion 183 manufactured to be the thinnest, the cholesteric liquid crystal may grow in a spiral shape and have a pitch that reflects light in the blue wavelength band.

[0120] Since the wavelength band in which the cholesteric liquid crystal reflects varies according to the pitch, the thickness of the encapsulation layer 150 can be adjusted differently according to the region, so as to reflect the light emitted from the pixels.

[0121] Figure 14 FIG. is a view showing a display panel according to a sixth embodiment of the present disclosure. Figure 15 FIG. is a view showing a display panel according to a seventh embodiment of the present disclosure. Figure 16 FIG. is a view showing a display panel according to an eighth embodiment of the present disclosure. Figure 17 FIG. is a view showing a display panel according to a ninth embodiment of the present disclosure.

[0122] Referring to Figure 14 , a separate optical layer 190 may be further provided on the encapsulation layer 150. The optical layer 190 may be a layer of various light-transmitting materials used or available in the display panel, such as a bank or various organic material layers and inorganic material layers. The optical layer 190 may include a first stepped portion 191, a second stepped portion 192, and a third stepped portion 193 having different thicknesses.

[0123] According to this configuration, the encapsulation layer 150 can be manufactured to be flat to protect the pixels, and the optical layer 190 can be additionally formed on the encapsulation layer 150 to form steps.

[0124] Referring to Figure 15 , a light condensing layer CL may also be provided between the color filter CF and the encapsulation layer 150. At least one high refractive index layer 155 and one low refractive index layer 156 may be stacked in the light condensing layer CL. In this case, one of the high refractive index layer 155 and the low refractive index layer 156 may have a convex shape, such as a prism, a conical shape, or a dome shape. Since the light emitted from the sub-pixels SP1, SP2, and SP3 is condensed by the light condensing layer, the light extraction efficiency can be improved.

[0125] Referring to Figure 16 , after forming steps in the encapsulation layer 150, the color filter CF may be manufactured on the encapsulation layer 150. Since the steps are formed by the encapsulation layer 150, the color filter CF can be manufactured with the same thickness. Therefore, the conventional performance of the color filter CF can be maintained as it is.

[0126] Referring to Figure 17 , a plurality of sub-pixels SP1, SP2, and SP3 and the encapsulation layer 150 may be stacked on the substrate 110. The plurality of sub-pixels SP1, SP2, and SP3 may include a plurality of circuit layers PC1 and a light emitting element layer EP1.

[0127] The light-emitting element layer EP1 includes light-emitting elements respectively disposed in sub-pixels SP1, SP2, and SP3 and driven by a pixel circuit. The light-emitting element layer EP1 may be a white light-emitting element commonly disposed in sub-pixels SP1, SP2, and SP3 and generating white light.

[0128] In another embodiment, a red light-emitting element generating red light may be disposed in the red sub-pixel SP1, a green light-emitting element generating green light may be disposed in the green sub-pixel SP2, and a blue light-emitting element generating blue light may be disposed in the blue sub-pixel SP3.

[0129] The light-emitting element may be implemented as an organic light-emitting element or an inorganic light-emitting element. For example, the light-emitting element may be implemented as an organic light-emitting diode (OLED) or an inorganic LED.

[0130] The first electrode 120 may be an anode of a light-emitting element separated for each sub-pixel. The second electrode 140 may be a common electrode shared by the sub-pixels. The second electrode 140 may be a cathode of the light-emitting element.

[0131] The encapsulation layer 150 may cover the light-emitting element layer EP1 to seal the circuit layer PC1 and the light-emitting element layer EP1. The encapsulation layer 150 may have a multi-layer insulating film structure in which an organic film and an inorganic film are alternately stacked. The inorganic film blocks the penetration of moisture or oxygen. The organic film planarizes the surface of the inorganic film. When the organic film and the inorganic film are stacked in multiple layers, since the movement path of moisture or oxygen is longer than that of a single layer, the penetration of moisture and oxygen affecting the light-emitting element layer EP1 can be effectively blocked.

[0132] The first electrode 120 may also be used as a reflective layer to improve light efficiency, and the second electrode 140 may be implemented as a transparent or semi-transparent electrode. In a top-emission type display panel, the distance between the first electrode 120 and the second electrode 140 may be set differently for the colors of the sub-pixels SP1, SP2, and SP3 to obtain a microcavity effect. When the microcavity is utilized, since the light reflected between the electrodes 120 and 140 undergoes constructive interference, the wavelength size of the light increases, and thus the amount of light emitted to the outside in the top-emission type display panel can be increased.

[0133] The encapsulation layer 150, the alignment film 170, and the reflective layer 180 may have the same structure as described above.

[0134] Figures 18A to 18E It is a diagram showing the manufacturing process of a display panel according to an embodiment of the present disclosure.

[0135] Refer to Figure 18A, a plurality of first electrodes 120 can be formed on the substrate 110. The plurality of first electrodes 120 can be set to have different heights according to the types of sub-pixels SP1, SP2, and SP3. The plurality of first electrodes 120 can be selectively disposed on the plurality of insulating layers 121, 122, and 123.

[0136] An organic light-emitting element layer EP1 can be disposed on the first electrode 120, and a second electrode 140 and a encapsulation layer 150 can be disposed on the organic light-emitting element layer EP1.

[0137] A color filter CF including a first color filter CF1, a second color filter CF2, and a third color filter CF3 can be formed on the encapsulation layer 150. In this case, the thicknesses of the first color filter CF1, the second color filter CF2, and the third color filter CF3 can be the same.

[0138] Referring to Figure 18B , the first color filter CF1 and the second color filter CF2 can be selectively etched. The third color filter CF3 can also be etched to have a desired thickness. Various semiconductor etching methods can be applied as the etching method of the color filter CF. For example, a plasma etching method or a dry or wet etching method using a mask can be applied.

[0139] Etching can be performed such that the thickness d1 of the first color filter CF1 is less than the thickness d2 of the second color filter CF2, and etching can be performed such that the thickness d2 of the second color filter CF2 is less than the thickness d3 of the third color filter CF3.

[0140] Referring to Figure 18C , an alignment layer 170 can be coated and rubbed on the first color filter CF1, the second color filter CF2, and the third color filter CF3 having different thicknesses. In this case, since the first color filter CF1, the second color filter CF2, and the third color filter CF3 have different thicknesses, the alignment layer 170 coated thereon can include a first alignment region 171 provided on the first color filter CF1, the second color filter CF2, and the third color filter CF3 and a second alignment region 172 provided on the sides of the second color filter CF2 and the third color filter CF3. The alignment layer 170 can be rubbed in one direction by a rubbing member 61. In this case, both the first alignment region 171 and the second alignment region 172 of the alignment layer 170 can be rubbed.

[0141] Referring to Figure 18D , a cholesteric liquid crystal CLC can be coated on the alignment layer 170. The cholesteric liquid crystal CLC can be coated to have a flat upper surface. Therefore, the cholesteric liquid crystal disposed on the relatively thin first color filter CF1 can be relatively thick. On the other hand, the cholesteric liquid crystal disposed on the relatively thick third color filter CF3 can be relatively thin.

[0142] Referring to Figure 18E , this process can be completed by curing the cholesteric liquid crystal CLC. The pitch of the helix formed by the cholesteric liquid crystal molecules in the first reflective layer 181 can be 365 nm to 520 nm. The pitch of the helix formed by the cholesteric liquid crystal molecules in the second reflective layer 182 can be 290 nm to 380 nm. The pitch of the helix formed by the cholesteric liquid crystal molecules in the third reflective layer 183 can be 265 nm to 330 nm.

[0143] The first reflective portion 181 can transmit the right circularly polarized red light emitted by the first color filter CF1 and reflect the left circularly polarized red light emitted by the first color filter CF1. Since the reflected light is reflected by the reflector or the substrate 110 disposed below the pixel, the polarization direction can be changed. Therefore, the reflected red light can pass through the first color filter CF1 and the first reflective portion 181 again, and can be emitted to the outside.

[0144] The second reflective portion 182 can transmit the right circularly polarized light in the green light emitted by the second color filter CF2 and reflect the left circularly polarized light in the green light emitted by the second color filter CF2. Since the reflected light is reflected by the reflector or the substrate 110 disposed below the pixel, the polarization direction is changed, so the reflected light can pass through the second reflective portion 182.

[0145] The third reflective portion 183 can transmit the left circularly polarized light in the blue light emitted by the third color filter CF3 and reflect the right circularly polarized light in the blue light emitted by the third color filter CF3. Since the reflected light is reflected by the reflector or the substrate 110 disposed below the pixel, the polarization direction is changed, so the reflected light can pass through the third reflective portion 183.

[0146] Figure 19 FIG. is a diagram showing a display panel according to a tenth embodiment of the present disclosure. Figures 20A to 20C FIG. is a diagram showing a manufacturing process of a display panel according to an embodiment of the present disclosure.

[0147] Referring to Figure 19 , the display panel may include a plurality of sub-pixels SP1, SP2, and SP3 disposed on the substrate 110, a color filter CF disposed on the plurality of sub-pixels SP1, SP2, and SP3, a reflective layer 180 disposed on the color filter CF, and an optical layer 190 disposed on the reflective layer 180.

[0148] The color filter CF may include a first color filter CF1, a second color filter CF2, and a third color filter CF3, and the thicknesses of the first color filter CF1, the second color filter CF2, and the third color filter CF3 may be the same. The first color filter CF1 may be a red color filter, the second color filter CF2 may be a green color filter, and the third color filter CF3 may be a blue color filter.

[0149] The reflective layer 180 may include a first reflective portion 181 disposed on the first color filter CF1, a second reflective portion 182 disposed on the second color filter CF2, and a third reflective portion 183 disposed on the third color filter CF3. The first reflective portion 181 may be fabricated to be thicker than the second reflective portion 182, and the second reflective portion 182 may be fabricated to be thicker than the third reflective portion 183.

[0150] According to this embodiment, the reflective layer 180 may be made of a cholesteric liquid crystal CLC. Thus, the first reflective portion 181, which is formed to be the thickest, may transmit the right circularly polarized light in the red light emitted from the first color filter CF1 and reflect the left circularly polarized light in the red light emitted from the first color filter CF1. Since the reflected light may be reflected by a reflector or a substrate 110 disposed below the pixel, the polarization direction may be changed. Therefore, the reflected red light may pass through the first color filter CF1 and the first reflective portion 181 again and be emitted to the outside. According to the same principle, the extraction efficiency of the light emitted from the green light emitted from the second sub-pixel SP2 and the blue light emitted from the third sub-pixel SP3 from the display panel may be improved.

[0151] The reflective layer 180 may be attached to the color filter CF through an adhesive layer OC1. According to an embodiment, the reflective layer 180 may be separately fabricated and attached to the color filter CF. According to this configuration, all the thicknesses of the color filter CF may be fabricated to be the same.

[0152] The optical layer 190 may be disposed on the reflective layer 180. The optical layer 190 may include a first stepped portion 191 disposed on the first reflective portion 181, a second stepped portion 192 disposed on the second reflective portion 182, and a third stepped portion 193 disposed on the third reflective portion 183.

[0153] The reflective layer 180 may be fabricated such that the first reflective portion 181 is the thickest and the third reflective portion 183 is the thinnest. On the other hand, the optical layer 190 may be fabricated such that the first stepped portion 191 is the thinnest and the third stepped portion 193 is the thickest. Thus, the sum of the thickness of the first reflective portion 181 and the thickness of the first stepped portion 191 may be equal to the sum of the thickness of the third reflective portion 183 and the thickness of the third stepped portion 193.

[0154] Refer to Figure 20A, an optical layer 190 can be formed on the manufacturing substrate 50. The optical layer 190 can be formed using a packaging layer, a dam, or other transparent optical layers. The optical layer 190 can be formed to have the same thickness, and then the first stepped portion 191, the second stepped portion 192, and the third stepped portion 193 can be formed by etching.

[0155] Referring to Figure 20B , after the alignment film 170 is coated on the optical layer 190, the reflective layer 180 can be formed by coating a cholesteric liquid crystal layer. Since the thicknesses of the first stepped portion 191, the second stepped portion 192, and the third stepped portion 193 are different, the pitch of the cholesteric liquid crystal molecules formed thereon is also different.

[0156] Referring to Figure 20C , after the manufacturing substrate 50 is removed, the reflective layer 180 can be attached to the color filter CF. According to this configuration, since the color filter CF can be manufactured to have the same thickness, the performance of the color filter CF can be maintained.

[0157] Figure 21 is an exploded perspective view showing a personal immersive device according to an embodiment of the present disclosure.

[0158] Referring to Figure 21 , the personal immersive device includes a lens module 12, a display module 13, a main board 14, a headgear 11, a side frame 15, a front cover 16, etc.

[0159] The display module 13 can include a display panel driving circuit for driving each of the two display panels and displaying the input image received from the main board 14. The display panel can be divided into a first display panel visible to the user's left eye and a second display panel visible to the user's right eye. The display module can display the image data input from the main board on the display panel. The image data can be two-dimensional (2D) / three-dimensional (3D) image data, which realizes video images of virtual reality (VR) or augmented reality (AR). The display module 13 can display various types of information input from the main board in the form of text, symbols, etc.

[0160] The lens module 12 can include an ultra-wide-angle lens, that is, a pair of fish-eye lenses (LENS), for expanding the viewing angles of the user's left and right eyes. The pair of fish-eye lenses (LENS) can include a left-eye lens disposed in front of the first display panel and a right-eye lens disposed in front of the second display panel.

[0161] The main board 14 may include a processor that executes virtual reality software and provides a left-eye image and a right-eye image to the display module 13. In addition, the main board 14 may also include an interface module, a sensor module, etc. that are connected to external devices. The interface module may be connected to an external device through interfaces such as a Universal Serial Bus (USB), a High-Definition Multimedia Interface (HDMI), etc. The sensor module may include various sensors such as a gyro sensor, an acceleration sensor, etc. The processor of the main board 14 may correct the left-eye image data and the right-eye image data in response to the output signal of the sensor module, and transmit the left-eye data and the right-eye image data of the input image received through the interface module to the display module 13. The processor may generate a left-eye image and a right-eye image that match the resolution of the display panel based on the analysis result of the depth information of the 2D image, and then transmit the left-eye image and the right-eye image to the display module 13.

[0162] The head-mounted device 11 includes a rear cover that exposes a fish-eye lens (LENS) and a band connected to the rear cover. The rear cover, the side frame 15, and the front cover 16 of the head-mounted device 11 are assembled together to ensure the internal space for setting the components of the personal immersive device and protect each component. These components include the lens module 12, the display module 13, and the main board 14. The band may be connected to the rear cover. The user can wear the personal immersive device on the user's head through the band. When the personal immersive device is worn on the user's head, the user can view different display panels with the left eye and the right eye through the fish-eye lens (LENS).

[0163] The side frame 15 may be fixed between the head-mounted device 11 and the front cover 16 to ensure a gap in the internal space for setting the lens module 12, the display module 13, and the main board 14. The front cover 16 may be provided on the front of the personal immersive device.

[0164] The personal immersive device of the present disclosure may be implemented as a head-mounted display (HMD) structure, but is not limited thereto. For example, the present disclosure may be designed as an eyeglass-type display (EGD) in a glasses structure, a face-mounted display (FMD) worn on the face, etc.

[0165] According to the present specification, the display panel may utilize a cholesteric liquid crystal reflective layer to simultaneously serve as a polarizer and a condenser layer. Therefore, since an optical system based on polarization can be used, the device can be miniaturized and the brightness can be increased. Therefore, low-power driving can be achieved.

[0166] In addition, since the reflective layer can simultaneously serve as a conventional polarizer and a condenser layer, the conventional stress-sensitive circular polarizer can be omitted, the reliability of the panel can be improved, and the manufacturing process of the panel can be simplified.

[0167] The effects according to this specification are not limited to the above effects, and those skilled in the art can clearly understand other effects not mentioned through the description of the claims.

[0168] Since the technical problems to be solved, technical solutions, effects, etc. disclosed in the content of this specification do not specify the necessary features of the claims, the scope of the claims is not limited by the items disclosed in the content of this specification.

[0169] Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the technical concept of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical concept of the present invention, but to illustrate the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by these embodiments. Therefore, the above embodiments should be understood as illustrative rather than restrictive in all aspects. The scope of the present invention should be interpreted by the claims, and should be interpreted as including all technical concepts within the equivalent scope in the scope of the present invention.

Claims

1. A display panel, comprising: substrate; A plurality of pixels, including a first sub-pixel, a second sub-pixel and a third sub-pixel disposed on the substrate; as well as a reflective layer, comprising a first reflective portion disposed on the first sub-pixel, a second reflective portion disposed on the second sub-pixel, and a third reflective portion disposed on the third sub-pixel, The first reflective portion, the second reflective portion and the third reflective portion have different thicknesses.

2. The display panel according to claim 1, wherein: The first reflecting portion is thicker than the second reflecting portion, and The second reflecting portion is thicker than the third reflecting portion.

3. The display panel according to claim 2, wherein: The first reflecting portion, the second reflecting portion and the third reflecting portion include cholesteric liquid crystal, and The pitches of the cholesteric liquid crystals included in the first reflecting portion, the second reflecting portion, and the third reflecting portion are different.

4. The display panel according to claim 3, wherein: The first reflective portion selectively transmits and reflects red light corresponding to the pitch of the cholesteric liquid crystal, The second reflective portion selectively transmits and reflects green light corresponding to the pitch of the cholesteric liquid crystal, and The third reflective portion selectively transmits and reflects blue light corresponding to the pitch of the cholesteric liquid crystal.

5. The display panel according to claim 1 , further comprising a color filter disposed between the plurality of pixels and the reflective layer, in, The color filter includes a first color filter disposed between the first sub-pixel and the first reflective portion, a second color filter disposed between the second sub-pixel and the second reflective portion, and a third color filter disposed between the third sub-pixel and the third reflective portion.

6. The display panel according to claim 5, wherein: The thickness of the first color filter is smaller than the thickness of the second color filter, and The thickness of the second color filter is smaller than the thickness of the third color filter.

7. The display panel according to claim 1, further comprising an encapsulation layer disposed between the plurality of pixels and the reflective layer, in, The encapsulation layer includes a first encapsulation portion disposed between the first sub-pixel and the first reflective portion, a second encapsulation portion disposed between the second sub-pixel and the second reflective portion, and a third encapsulation portion disposed between the third sub-pixel and the third reflective portion. The thickness of the second packaging part is greater than the thickness of the first packaging part, and The thickness of the third encapsulation portion is greater than the thickness of the second encapsulation portion. 8 . The display panel according to claim 6 , further comprising an alignment film disposed between the reflective layer and the color filter.

9. The display panel according to claim 8, wherein: The alignment film includes first alignment regions disposed on the first color filter, the second color filter, and the third color filter, and second alignment regions disposed on a side surface of the second color filter and a side surface of the third color filter.

10. The display panel according to claim 1, further comprising a light-collecting layer disposed between the plurality of pixels and the reflective layer, in, The light-condensing layer includes a high-refractive-index layer disposed on the first sub-pixel, the second sub-pixel, and the third sub-pixel, and a low-refractive-index layer disposed on the high-refractive-index layer.

11. The display panel according to claim 1, wherein: Each of the first sub-pixel, the second sub-pixel, and the third sub-pixel includes a first electrode, a light emitting element disposed on the first electrode, and a second electrode disposed on the light emitting element.

12. The display panel according to claim 11, wherein: The light reflected by the reflective layer is reflected toward the reflective layer through the first electrode.

13. A personal immersive device comprising: Display panel; as well as A lens portion is provided on the display panel. Wherein, the display panel comprises: substrate; a plurality of pixels, including a first sub-pixel, a second sub-pixel, and a third sub-pixel disposed on the substrate; and a reflective layer including a first reflective portion disposed on the first sub-pixel, a second reflective portion disposed on the second sub-pixel, and a third reflective portion disposed on the third sub-pixel, and The first reflective portion, the second reflective portion, and the third reflective portion have different thicknesses.

14. The personal immersive device of claim 13, wherein: The first reflecting portion is thicker than the second reflecting portion, and The second reflecting portion is thicker than the third reflecting portion.

15. The personal immersive device of claim 14, wherein: The first reflecting portion, the second reflecting portion and the third reflecting portion include cholesteric liquid crystal, and The pitches of the cholesteric liquid crystals included in the first reflecting portion, the second reflecting portion, and the third reflecting portion are different.

16. The personal immersive device of claim 13, further comprising a color filter disposed between the plurality of pixels and the reflective layer, in, The color filter includes a first color filter disposed between the first sub-pixel and the first reflective portion, a second color filter disposed between the second sub-pixel and the second reflective portion, and a third color filter disposed between the third sub-pixel and the third reflective portion.

17. The personal immersive device of claim 16, wherein: The thickness of the first color filter is smaller than the thickness of the second color filter, and The thickness of the second color filter is smaller than the thickness of the third color filter.

18. A display panel, comprising: substrate; A plurality of pixels, including a first sub-pixel, a second sub-pixel and a third sub-pixel disposed on the substrate; a color filter, the color filter comprising a red color filter disposed on the first sub-pixel, a green color filter disposed on the second sub-pixel, and a blue color filter disposed on the third sub-pixel; as well as a cholesteric liquid crystal layer, the cholesteric liquid crystal layer comprising a first cholesteric liquid crystal portion disposed on the red color filter, a second cholesteric liquid crystal portion disposed on the green color filter, and a third cholesteric liquid crystal portion disposed on the blue color filter, The thickness of the first cholesteric liquid crystal portion is greater than the thickness of the second cholesteric liquid crystal portion, and the thickness of the second cholesteric liquid crystal portion is greater than the thickness of the third cholesteric liquid crystal portion.

19. The display panel according to claim 18, wherein: The thickness of the red color filter is smaller than the thickness of the green color filter, and the thickness of the green color filter is smaller than the thickness of the blue color filter. 20 . The display panel according to claim 18 , further comprising a reflection plate disposed between the substrate and the plurality of pixels.

Images