Head mounted display device, eyewear display device, and mobile display device

Abstract

A mobile display device, a head-mounted display device, and a glasses-type display device are provided. The mobile display device includes: a first display device providing an image to a left eye of a user; a second display device providing an image to the right eye of the user; a display device housing accommodating the first display device and the second display device; and a housing cover covering the display device housing and including a first eyepiece aligned with the first display device and a second eyepiece aligned with the second display device. Each of the first display device and the second display device includes a display panel and a circuit board disposed at one end of the display panel and including a driving circuit. The circuit board of the first display device and the circuit board of the second display device are arranged symmetrically with respect to a center of the housing cover positioned between the first eyepiece and the second eyepiece.

Description

[0001] This application claims the priority of Korean Patent Application No. 10-2023-0124548 filed in the Korean Intellectual Property Office on September 19, 2023, the contents of which are incorporated herein in their entirety by reference. Technical Field

[0002] The present disclosure relates to a head-mounted display device, a glasses-type display device, and display devices having these forms. Background Art

[0003] A wearable device is being developed that is in the form of glasses or a helmet and forms a focus at a position close to the user's eyes. For example, the wearable device may be a head mounted display (HMD) device or augmented reality (AR) glasses. Such a wearable device provides an AR screen or a virtual reality (VR) screen to the user.

[0004] Wearable devices such as HMD devices or AR glasses have display specifications of at least 2000 PPI (pixels per inch) to allow users to use for a long time without dizziness. For this reason, organic light emitting diode on silicon (OLEDoS) technology has emerged as a high-resolution small organic light emitting element display device. OLEDoS is a technology for disposing an organic light emitting diode (OLED) on a semiconductor wafer substrate on which a complementary metal oxide semiconductor (CMOS) is disposed.

[0005] A display panel of a display device using OLEDoS technology includes an optical layer including a lens array on an emission material layer. The lens array includes a structure that increases the ratio of light toward the front side of the display device. The position of the optical best point of the lens array determines the field of view (FoV). Since distortion of an image displayed to a user may occur depending on the position of the optical best point of the lens array, the lens array should be optimized. Summary of the invention

[0006] Embodiments of the present disclosure provide a head-mounted display device, a glasses-type display device, and a display device having these forms that can expand the field of view and reduce image distortion by correcting the position of the optical best point of a lens array.

[0007] Embodiments of the present disclosure provide a head-mounted display device, a glasses-type display device, and a display device having these forms, which can expand the field of view and reduce image distortion by correcting the position of the optical best point and can save manufacturing costs with a simple structure.

[0008] According to an embodiment of the present disclosure, a mobile display device includes: a first display device that provides an image to a user's left eye; a second display device that provides an image to a user's right eye; a display device housing that accommodates the first display device and the second display device; and a housing cover that covers a surface of the display device housing and includes a first eyepiece aligned with the first display device and a second eyepiece aligned with the second display device. Each of the first display device and the second display device includes a display panel and a circuit board, the display panel includes an emission material layer and an optical layer, the optical layer includes a lens disposed on the emission material layer, and the circuit board is disposed at one end of the display panel and includes a driving circuit for driving the display panel. The circuit board of the first display device and the circuit board of the second display device are arranged symmetrically with respect to the center of the housing cover positioned between the first eyepiece and the second eyepiece.

[0009] The first circuit board of the first display device can be set in a first space of the display device housing positioned along a first direction from the first eyepiece, and the second circuit board of the second display device can be set in a second space of the display device housing positioned along a second direction opposite to the first direction from the second eyepiece.

[0010] The first display device may include a first display panel and a first circuit board, the first display panel includes a first emission material layer and a first optical layer, and the first circuit board is arranged along a first direction from the first display panel. The second display device may include a second display panel and a second circuit board, the second display panel includes a second emission material layer and a second optical layer, and the second circuit board is arranged along a second direction from the second display panel.

[0011] The first lens of the first optical layer and the second lens of the second optical layer may be arranged symmetrically with respect to the center of the housing cover.

[0012] A first optical optimal point of the first optical layer may be offset from the center of the first display panel in a third direction, and a second optical optimal point of the second optical layer may be offset from the center of the second display panel in a fourth direction opposite to the third direction.

[0013] The first lens may include: a first central lens associated with the first optical optimal point and aligned with the center of the sub-pixel of the first emission material layer; and a first peripheral lens disposed outside the first central lens and offset from the center of the sub-pixel of the first emission material layer by a predetermined distance.

[0014] The predetermined distance of the first peripheral lens may increase as the first peripheral lens is farther away from the first optical optimum point.

[0015] The first peripheral lens may include: a first radius lens positioned at a first radius distance from the first optical optimal point and offset and aligned by a first distance from the center of the sub-pixel; and a second radius lens positioned at a second radius distance from the first optical optimal point and offset and aligned by a second distance from the center of the sub-pixel, the second radius distance being greater than the first radius distance.

[0016] The first direction is a direction from the first display panel to the center of the housing cover, the second direction is a direction from the second display panel to the center of the housing cover, the third direction is opposite to the first direction, and the fourth direction is opposite to the second direction.

[0017] The first direction and the third direction are directions from the center of the housing cover toward the first display panel, and the second direction and the fourth direction are directions from the center of the housing cover toward the second display panel.

[0018] The first direction is an upward direction of the housing cover, the second direction is a downward direction of the housing cover, the third direction points from the center of the housing cover to the first display panel, and the fourth direction points from the center of the housing cover to the second display panel.

[0019] The mobile display device may be a head-mounted display device or a glasses-type display device that provides virtual reality or augmented reality.

[0020] According to an embodiment of the present disclosure, a head-mounted display device includes: a first display device that provides an image to a user's left eye; a second display device that provides an image to a user's right eye; a display device housing that accommodates the first display device and the second display device; and a housing cover that covers a surface of the display device housing and includes a first eyepiece aligned with the first display device and a second eyepiece aligned with the second display device. Each of the first display device and the second display device includes a display panel and a circuit board, the display panel includes an emission material layer and an optical layer, the optical layer includes a lens disposed on the emission material layer, and the circuit board is disposed at one end of the display panel and includes a driving circuit for driving the display panel. The circuit board of the first display device and the circuit board of the second display device are arranged symmetrically with respect to the center of the housing cover positioned between the first eyepiece and the second eyepiece.

[0021] The first circuit board of the first display device can be set in a first space of the display device housing positioned along a first direction from the first eyepiece, and the second circuit board of the second display device can be set in a second space of the display device housing positioned along a second direction opposite to the first direction from the second eyepiece.

[0022] The first display device may include a first display panel and a first circuit board, the first display panel includes a first emission material layer and a first optical layer, and the first circuit board is arranged along a first direction from the first display panel. The second display device may include a second display panel and a second circuit board, the second display panel includes a second emission material layer and a second optical layer, and the second circuit board is arranged along a second direction from the second display panel.

[0023] The first lens of the first optical layer and the second lens of the second optical layer may be arranged symmetrically with respect to the center of the housing cover.

[0024] According to an embodiment of the present disclosure, a glasses-type display device includes: a first display device that provides an image to a user's left eye; a second display device that provides an image to a user's right eye; a display device housing that accommodates the first display device and the second display device; and a housing cover that covers a surface of the display device housing and includes a first eyepiece aligned with the first display device and a second eyepiece aligned with the second display device. Each of the first display device and the second display device may include a display panel and a circuit board, the display panel including an emission material layer and an optical layer, the optical layer including a lens disposed on the emission material layer, and the circuit board is disposed at one end of the display panel and includes a driving circuit for driving the display panel. The circuit board of the first display device and the circuit board of the second display device may be arranged symmetrically with respect to the center of the housing cover positioned between the first eyepiece and the second eyepiece.

[0025] The first circuit board of the first display device can be set in a first space of the display device housing positioned along a first direction from the first eyepiece, and the second circuit board of the second display device can be set in a second space of the display device housing positioned along a second direction opposite to the first direction from the second eyepiece.

[0026] The first display device may include a first display panel and a first circuit board, the first display panel includes a first emission material layer and a first optical layer, and the first circuit board is arranged along a first direction from the first display panel. The second display device may include a second display panel and a second circuit board, the second display panel includes a second emission material layer and a second optical layer, and the second circuit board is arranged along a second direction from the second display panel.

[0027] The first lens of the first optical layer and the second lens of the second optical layer may be arranged symmetrically with respect to the center of the housing cover.

[0028] According to the head mounted display device, the glasses type display device, and the display device having these forms according to the embodiment, by correcting the position of the optical optimum point of the lens array, the field of view can be extended and the image distortion can be reduced.

[0029] Furthermore, according to the embodiments, a head-mounted display device, a glasses-type display device, and a display device having these forms have a simple structure and reduced manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a perspective view of a head mounted display device according to an embodiment of the present disclosure.

[0031] Figure 2 yes Figure 1 An exploded perspective view of a head mounted display device.

[0032] Figure 3 is a perspective view of a head mounted display device according to an embodiment of the present disclosure.

[0033] Figure 4 is an exploded perspective view of a display device according to an embodiment of the present disclosure.

[0034] Figure 5 is a cross-sectional view of a portion of a display panel according to an embodiment of the present disclosure.

[0035] Figure 6 The distortion is shown depending on the position of the optical sweet spot of the lens.

[0036] Figure 7 A display device according to a comparative example in which a decentering structure for correcting the position of the optical optimum point is not used is shown.

[0037] Figure 8 A display device according to an embodiment in which a decentering structure for correcting the position of an optical sweet spot is used is shown.

[0038] Fig. 9 is a cross-sectional view of the alignment of a central lens positioned at the optical sweet spot with a sub-pixel.

[0039] Fig.10 is a cross-sectional view of an alignment of a first radius lens and a sub-pixel positioned at a first radial distance from an optical sweet spot.

[0040] Fig.11 is a cross-sectional view of an alignment of a second radius lens and a sub-pixel positioned at a second radial distance from the optical sweet spot.

[0041] Fig.12 is a view comparing the field of view (FoV) of a user with and without a decentering structure for correcting the position of the optical sweet spot.

[0042] Figures 13 to 15 Various embodiments are shown in which a circuit board of a first display device and a circuit board of a second display device are symmetrically arranged. DETAILED DESCRIPTION

[0043] Embodiments of the present disclosure will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure are shown. However, the present disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein.

[0044] Like reference numerals may refer to like components throughout the specification.

[0045] The features of each of the various embodiments of the present disclosure may be combined with each other in part or in whole, and may variously interact with each other technically, and the various embodiments may be implemented independently of each other, or may be implemented together in association with each other.

[0046] Hereinafter, embodiments will be described with reference to the accompanying drawings.

[0047] Figure 1 is a perspective view of a head mounted display device according to an embodiment of the present disclosure. Figure 2 yes Figure 1 An exploded perspective view of an example of a head mounted display device.

[0048] Reference Figure 1 and Figure 2 According to the embodiment, the head-mounted display device 1 includes a first display device 10_1, a second display device 10_2, a display device housing 110, a housing cover 120, a first eyepiece 131, a second eyepiece 132, a headband 140, an intermediate frame 160, a first optical member 151, a second optical member 152, a control circuit board 170 and a connector.

[0049] The first display device 10_1 provides an image to the left eye of the user, and the second display device 10_2 provides an image to the right eye of the user. Figure 4 and Figure 5 The display device 10 described is essentially the same.

[0050] Therefore, the description of the first display device 10_1 and the second display device 10_2 will be referred to as Figure 4 and Figure 5 description instead.

[0051] The first optical member 151 is disposed between the first display device 10_1 and the first eyepiece 131. The second optical member 152 is disposed between the second display device 10_2 and the second eyepiece 132. Each of the first optical member 151 and the second optical member 152 includes at least one convex lens.

[0052] The middle frame 160 is disposed between the first display device 10_1 and the control circuit board 170 and between the second display device 10_2 and the control circuit board 170. The middle frame 160 supports and fixes the first display device 10_1, the second display device 10_2, and the control circuit board 170.

[0053] The control circuit board 170 is disposed between the middle frame 160 and the display device housing 110. The control circuit board 170 is connected to the first display device 10_1 and the second display device 10_2 through a connector. The control circuit board 170 converts an image source received from the outside into digital video data (DATA), and transmits the digital video data (DATA) to the first display device 10_1 and the second display device 10_2 through the connector.

[0054] The control circuit board 170 transmits digital video data (DATA) associated with a left-eye image optimized for the user's left eye to the first display device 10_1, and transmits digital video data (DATA) associated with a right-eye image optimized for the user's right eye to the second display device 10_2. However, in some embodiments, the control circuit board 170 transmits the same digital video data (DATA) to the first display device 10_1 and the second display device 10_2.

[0055] The display device housing 110 accommodates the first display device 10_1, the second display device 10_2, the middle frame 160, the first optical member 151, the second optical member 152, the control circuit board 170, and the connector. The housing cover 120 covers the opening surface of the display device housing 110. The housing cover 120 includes a first eyepiece 131 for placing the user's left eye and a second eyepiece 132 for placing the user's right eye. Figure 1 and Figure 2 In the example shown in FIG. 1 , the first eyepiece 131 and the second eyepiece 132 are separately provided, but the embodiments of the present disclosure are not necessarily limited thereto. In some embodiments, the first eyepiece 131 and the second eyepiece 132 are combined into a single element.

[0056] The first eyepiece 131 is aligned with the first display device 10_1 and the first optical member 151, and the second eyepiece 132 is aligned with the second display device 10_2 and the second optical member 152. Therefore, the user can see the virtual image on the first display device 10_1 magnified by the first optical member 151 through the first eyepiece 131, and see the virtual image on the second display device 10_2 magnified by the second optical member 152 through the second eyepiece 132.

[0057] As will be described below, each of the first display device 10_1 and the second display device 10_2 includes a display panel and a circuit board, the circuit board including a driving circuit for driving the display panel. The display panel includes an emission material layer and an optical layer, the optical layer including a lens disposed on the emission material layer. For example, the first display device 10_1 includes a first circuit board 431, and the second display device 10_2 includes a second circuit board 432.

[0058] like Figure 2 As shown in , the first circuit board 431 of the first display device 10_1 and the second circuit board 432 of the second display device 10_2 are symmetrically arranged with respect to the center 201 of the housing cover 120 positioned between the first eyepiece 131 and the second eyepiece 132. Since the first circuit board 431 and the second circuit board 432 are symmetrically arranged with respect to the center 201 of the housing cover 120, a decenter structure for correcting the position of the optical best point can be used for the display panel of each of the display devices, so that image distortion can be prevented by a simplified structure and the manufacturing cost can be reduced. For example, in the first display device 10_1 and the second display device 10_2, the decenter structure used by the display panel for correcting the position of the optical best point has a substantially identical structure. According to an embodiment, the first display device 10_1 and the second display device 10_2 have substantially the same structure and the first circuit board 431 and the second circuit board 432 are symmetrically arranged with respect to the center 201 of the housing cover 120, so that the decenter structure can have a simplified structure. For example, according to the embodiment, by manufacturing a pair of identical display devices 10_1 and 10_2, an undistorted image can be provided to each of the left eye and the right eye of the user, so the first display device 10_1 and the second display device 10_2 do not need to be designed differently in order to use the eccentric structure. Figures 8 to 15 The embodiments of the present disclosure are described in detail.

[0059] The headband 140 fixes the display device housing 110 to the user's head so that the first eyepiece 131 and the second eyepiece 132 of the housing cover 120 remain aligned with the user's left eye and right eye, respectively. By realizing a light and small display device housing 110, the head mounted display device 1 may include a Figure 3 The glasses shown in the picture are frames instead of headband.

[0060] In addition, the head mounted display device 1 may further include a battery for power supply, an external memory slot for inserting an external memory, and an external connection port and a wireless communication module for receiving an image source. The external connection port is one of a USB (Universal Serial Bus) terminal, a display port, and an HDMI (High Definition Multimedia Interface) terminal. The wireless communication module is one of a 5G communication module, a 4G communication module, a Wi-Fi module, and a Bluetooth module.

[0061] Figure 3 is a perspective view of a head mounted display device according to an embodiment of the present disclosure.

[0062] Reference Figure 3 The head mounted display device 1_1 according to the embodiment is a glasses type display device having a light and small display device housing 120_1. The head mounted display device 1_1 according to the embodiment includes a display device 10_3, a left eye lens 311, a right eye lens 312, a support frame 350, temples 341 and 342, an optical member 320, an optical path conversion member 330, and a display device housing 120_1.

[0063] Figure 3 The display device 10_3 shown in FIG. Figure 4 and Figure 5 The display device 10 described is essentially the same.

[0064] The display device housing 120_1 is disposed on the right and left sides of the support frame 350. The display device housing 120_1 accommodates the display device 10_3, the optical member 320, and the optical path conversion member 330. The image displayed on the display device 10_3 is magnified by the optical member 320, and the optical path of the image is converted by the optical path conversion member 330 to be provided to the right eye of the user through the right eye lens 312 and to the left eye of the user through the left eye lens 311. As a result, the user can see an augmented reality image combining a virtual image displayed on the display device 10_3 and a real-world image seen through the left eye lens 311 and the right eye lens 312 with the left eye and the right eye lens.

[0065] Figure 4 is an exploded perspective view of a display device according to an embodiment of the present disclosure.

[0066] Reference Figure 4 , the display device 10 according to the embodiment can display a moving image or a still image. The display device 10 according to the embodiment can be used by portable electronic devices such as mobile phones, smart phones, tablet PCs, mobile communication terminals, electronic notebooks, electronic books, portable multimedia players (PMPs), navigation devices, and ultra-mobile PCs (UMPCs). For example, the display device 10 is used as a display unit of a television, a laptop computer, a monitor, an electronic billboard, an Internet of Things (IOT) device. In some embodiments, the display device 10 is incorporated into a smart watch, a watch phone, or a head-mounted display (HMD) device that implements virtual reality and / or augmented reality.

[0067] According to an embodiment, the display device 10 includes a display panel 410 , a heat dissipation layer 420 , a circuit board 430 , a driving circuit 440 , and a power supply circuit 450 .

[0068] When viewed from above, the display panel 410 has a generally rectangular shape. For example, when viewed from above, the display panel 410 has a generally rectangular shape having a shorter side in a first direction DR1 and having a longer side in a second direction DR2 intersecting the first direction DR1. In the display panel 410, the angle where the shorter side in the first direction DR1 meets the longer side in the second direction DR2 may be rounded with a predetermined curvature, or may be a right angle. In addition, the shape of the display panel 410 when viewed from above is not limited to a rectangular shape, and may have, for example, a different polygonal shape, a circular shape, or an elliptical shape. When viewed from above, the shape of the display device 10 follows the shape of the display panel 410, but embodiments of the present disclosure are not necessarily limited thereto.

[0069] The display panel 410 includes a display area where an image is displayed and a non-display area where no image is displayed.

[0070] The display area includes a plurality of pixels, and each of the plurality of pixels includes a plurality of sub-pixels SP1, SP2, and SP3 (see Figure 5 ). The sub-pixels SP1, SP2 and SP3 include a plurality of pixel transistors. The pixel transistors are formed by a semiconductor process and are disposed on a semiconductor substrate SSUB (see Figure 5 For example, the pixel transistor is implemented as a complementary metal oxide semiconductor (CMOS) transistor.

[0071] The heat dissipation layer 420 overlaps the display panel 410 in the third direction DR3 which is the thickness direction of the display panel 410. The heat dissipation layer 420 is provided on one surface (such as the rear surface) of the display panel 410. The heat dissipation layer 420 discharges heat generated in the display panel 410. The heat dissipation layer 420 includes a metal layer or a non-metal layer having high thermal conductivity, such as at least one of graphite, silver (Ag), copper (Cu), and aluminum (Al).

[0072] The circuit board 430 is electrically connected to a plurality of pads in a pad area of ​​the display panel 410 using a conductive adhesive member such as an anisotropic conductive film. The circuit board 430 may be a flexible printed circuit board made of a flexible material or a flexible film. Figure 4 The circuit board 430 is unfolded, but the circuit board 430 may be bent. When the circuit board 430 is bent, one end of the circuit board 430 is disposed on the rear surface of the display panel 410. The one end of the circuit board 430 is opposite to the opposite end of the pad in the pad area of ​​the circuit board 430 connected to the display panel 410.

[0073] The driving circuit 440 receives digital video data and a timing signal from an external source, and generates a scan timing control signal, an emission timing control signal, and a data timing control signal for controlling the display panel 410 in response to the timing signal.

[0074] The power supply circuit 450 generates a plurality of panel driving voltages in response to a power supply voltage received from an external source. For example, the power supply circuit 450 generates a first power supply voltage, a second power supply voltage, and a third power supply voltage, and transmits them to the display panel 410.

[0075] Each of the driving circuit 440 and the power supply circuit 450 may be implemented as an integrated circuit (IC) and attached to a surface of the circuit board 430 .

[0076] Figure 5 is a cross-sectional view of a portion of a display panel according to an embodiment of the present disclosure. For example, Figure 5 A cross-sectional structure of a portion of a display area including a plurality of sub-pixels SP1 , SP2 , and SP3 is shown.

[0077] Reference Figure 5 In an embodiment, the display panel 410 includes a semiconductor backplane SBP, an emission material backplane EBP, an emission material layer EML, an encapsulation layer TFE, an optical layer OPL, a cover layer CVL, and a polarizer.

[0078] The semiconductor backplane SBP includes a semiconductor substrate SSUB including a plurality of pixel transistors PTR, a plurality of semiconductor insulating films covering the plurality of pixel transistors PTR, and a plurality of contact terminals CTE electrically connected to the pixel transistors PTR.

[0079] The semiconductor substrate SSUB may be a silicon substrate, a germanium substrate or a silicon germanium substrate. The semiconductor substrate SSUB is doped with a first type impurity. A plurality of well areas WA are positioned in the upper surface of the semiconductor substrate SSUB. The well areas WA are doped with a second type impurity. The second type impurity is different from the first type impurity. For example, when the first type impurity is a p-type impurity, the second type impurity is an n-type impurity, and when the first type impurity is an n-type impurity, the second type impurity is a p-type impurity.

[0080] Each of the well regions WA includes a source region SA associated with a source electrode of the pixel transistor PTR, a drain region DA associated with a drain electrode of the pixel transistor PTR, and a channel region CH between the source region SA and the drain region DA.

[0081] Each of the source region SA and the drain region DA is doped with second type impurities. The gate electrode GE of the pixel transistor PTR overlaps the well region WA in the third direction DR3. The channel region CH overlaps the gate electrode GE in the third direction DR3. The source region SA is positioned on one side of the gate electrode GE, and the drain region DA is positioned on the opposite side of the gate electrode GE.

[0082] Each of the plurality of well regions WA further includes a first low-concentration impurity region disposed between the channel region CH and the source region SA and a second low-concentration impurity region disposed between the channel region CH and the drain region DA. The first low-concentration impurity region has a lower impurity concentration than the source region SA. The second low-concentration impurity region has a lower impurity concentration than the drain region DA. The distance between the source region SA and the drain region DA is increased by the first low-concentration impurity region and the second low-concentration impurity region. Therefore, the length of the channel region CH of each of the pixel transistors PTR can be increased, which can prevent pounch-through and hot carrier phenomena caused by a short channel.

[0083] The first semiconductor insulating film SINS1 is disposed on the semiconductor substrate SSUB. The first semiconductor insulating film SINS1 covers the plurality of pixel transistors PTR. The first semiconductor insulating film SINS1 may be made of silicon carbon nitride (SiCN) and silicon oxide (SiO x ) is formed by one of the inorganic films, but is not limited to this.

[0084] The second semiconductor insulating film SINS2 is provided on the first semiconductor insulating film SINS1. The second semiconductor insulating film SINS2 may be made of silicon oxide (SiO x )-type inorganic film is formed, but the embodiments of the present disclosure are not necessarily limited thereto.

[0085] A plurality of contact terminals CTE are disposed on the second semiconductor insulating film SINS2. Each of the plurality of contact terminals CTE is connected to one of the gate electrode GE, the source area SA, and the drain area DA of each of the pixel transistors PTR through a hole passing through the first semiconductor insulating film SINS1 and the second semiconductor insulating film SINS2. The contact terminal CTE is formed of one of copper (Cu), aluminum (Al), tungsten (W), molybdenum (Mo), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), and neodymium (Nd), or an alloy thereof.

[0086] The third semiconductor insulating film SINS3 is provided on the second semiconductor insulating film SINS2 and on the side surface of each of the contact terminals CTE. The upper surface of each of the contact terminals CTE is not covered by the third semiconductor insulating film SINS3 but is exposed. The third semiconductor insulating film SINS3 is made of silicon oxide (SiO x )-type inorganic film is formed, but the embodiments of the present disclosure are not necessarily limited thereto.

[0087] The semiconductor substrate SSUB may be replaced by a glass substrate or a polymer resin substrate such as polyimide. For example, a thin film transistor is provided on a glass substrate or a polymer resin substrate. A glass substrate is a rigid substrate that is not bent, while a polymer resin substrate is a flexible substrate that can be bent or folded.

[0088] The emission material back plate EBP includes first to eighth metal layers ML1 to ML8, reflective electrodes RL1 to RL4, a plurality of vias VA1 to VA10, and a step layer STPL. In addition, the emission material back plate EBP includes a plurality of interlayer dielectric films INS1 to INS10 disposed between the first to eighth metal layers ML1 to ML8 and between the reflective electrodes RL1 to RL4.

[0089] The first metal layer ML1 to the eighth metal layer ML8 realize the circuit of the first sub-pixel SP1 by connecting a plurality of exposed contact terminals CTE in the semiconductor backplane SBP. For example, the transistors of the sub-pixel circuit are formed in the semiconductor backplane SBP, and the transistors and capacitors of the sub-pixel circuit are connected through the first metal layer ML1 to the eighth metal layer ML8. In addition, the connection between the drain region corresponding to the drain electrode of one of the transistors, the source region corresponding to the source electrode of the other transistor, and the first electrode of the light-emitting element is also made through the first metal layer ML1 to the eighth metal layer ML8.

[0090] The first interlayer dielectric film INS1 is disposed on the semiconductor backplane SBP. Each of the first vias VA1 penetrates the first interlayer dielectric film INS1 and is connected to the exposed contact terminal CTE. Each of the first metal layers ML1 is disposed on the first interlayer dielectric film INS1 and is connected to the first vias VA1.

[0091] The second interlayer dielectric film INS2 is disposed on the first interlayer dielectric film INS1 and the first metal layer ML1. Each of the second vias VA2 penetrates the second interlayer dielectric film INS2 and is connected to the exposed first metal layer ML1. Each of the second metal layers ML2 is disposed on the second interlayer dielectric film INS2 and is connected to the second vias VA2.

[0092] The third interlayer dielectric film INS3 is disposed on the second interlayer dielectric film INS2 and the second metal layer ML2. Each of the third vias VA3 penetrates the third interlayer dielectric film INS3 and is connected to the exposed second metal layer ML2. Each of the third metal layers ML3 is disposed on the third interlayer dielectric film INS3 and is connected to the third vias VA3.

[0093] The fourth interlayer dielectric film INS4 is disposed on the third interlayer dielectric film INS3 and the third metal layer ML3. Each of the fourth vias VA4 penetrates the fourth interlayer dielectric film INS4 and is connected to the exposed third metal layer ML3. Each of the fourth metal layers ML4 is disposed on the fourth interlayer dielectric film INS4 and is connected to the fourth vias VA4.

[0094] The fifth interlayer dielectric film INS5 is disposed on the fourth interlayer dielectric film INS4 and the fourth metal layer ML4. Each of the fifth vias VA5 penetrates the fifth interlayer dielectric film INS5 and is connected to the exposed fourth metal layer ML4. Each of the fifth metal layers ML5 is disposed on the fifth interlayer dielectric film INS5 and is connected to the fifth vias VA5.

[0095] The sixth interlayer dielectric film INS6 is disposed on the fifth interlayer dielectric film INS5 and the fifth metal layer ML5. Each of the sixth vias VA6 penetrates the sixth interlayer dielectric film INS6 and is connected to the exposed fifth metal layer ML5. Each of the sixth metal layers ML6 is disposed on the sixth interlayer dielectric film INS6 and is connected to the sixth vias VA6.

[0096] The seventh interlayer dielectric film INS7 is disposed on the sixth interlayer dielectric film INS6 and the sixth metal layer ML6. Each of the seventh vias VA7 penetrates the seventh interlayer dielectric film INS7 and is connected to the exposed sixth metal layer ML6. Each of the seventh metal layers ML7 is disposed on the seventh interlayer dielectric film INS7 and is connected to the seventh via VA7.

[0097] The eighth interlayer dielectric film INS8 is disposed on the seventh interlayer dielectric film INS7 and the seventh metal layer ML7. Each of the eighth vias VA8 penetrates the eighth interlayer dielectric film INS8 and is connected to the exposed seventh metal layer ML7. Each of the eighth metal layers ML8 is disposed on the eighth interlayer dielectric film INS8 and is connected to the eighth vias VA8.

[0098] The first metal layer ML1 to the eighth metal layer ML8 and the first via hole VA1 to the eighth via hole VA8 are made of substantially the same material. The first metal layer ML1 to the eighth metal layer ML8 and the first via hole VA1 to the eighth via hole VA8 are made of one of copper (Cu), aluminum (Al), tungsten (W), molybdenum (Mo), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni) and neodymium (Nd) or an alloy thereof. The first via hole VA1 to the eighth via hole VA8 are made of substantially the same material. The first interlayer dielectric film INS1 to the eighth interlayer dielectric film INS8 are made of silicon oxide (SiO x ) type inorganic film is formed, but the embodiments of the present specification are not necessarily limited to this.

[0099] The thickness of the first metal layer ML1, the thickness of the second metal layer ML2, the thickness of the third metal layer ML3, the thickness of the fourth metal layer ML4, the thickness of the fifth metal layer ML5, and the thickness of the sixth metal layer ML6 are greater than the thickness of the first via VA1, the thickness of the second via VA2, the thickness of the third via VA3, the thickness of the fourth via VA4, the thickness of the fifth via VA5, and the thickness of the sixth via VA6. The thickness of the second metal layer ML2, the thickness of the third metal layer ML3, the thickness of the fourth metal layer ML4, the thickness of the fifth metal layer ML5, and the thickness of the sixth metal layer ML6 are greater than the thickness of the first metal layer ML1. The thickness of the second metal layer ML2, the thickness of the third metal layer ML3, the thickness of the fourth metal layer ML4, the thickness of the fifth metal layer ML5, and the thickness of the sixth metal layer ML6 are substantially equal.

[0100] The thickness of the seventh metal layer ML7 and the thickness of the eighth metal layer ML8 are greater than the thickness of each of the first to sixth metal layers ML1, ML2, ML3, ML4, ML5, and ML6. The thickness of the seventh metal layer ML7 and the thickness of the eighth metal layer ML8 are greater than the thickness of the seventh via VA7 and the thickness of the eighth via VA8. The thickness of the seventh via VA7 and the thickness of the eighth via VA8 are greater than the thickness of each of the first to sixth vias VA1, VA2, VA3, VA4, VA5, and VA6. The thickness of the seventh metal layer ML7 is substantially equal to the thickness of the eighth metal layer ML8.

[0101] The ninth interlayer dielectric film INS9 is disposed on the eighth interlayer dielectric film INS8 and the eighth metal layer ML8. The ninth interlayer dielectric film INS9 is made of silicon oxide (SiO x )-type inorganic film is formed, but the embodiments of the present disclosure are not necessarily limited thereto.

[0102] Each of the ninth via holes VA9 penetrates the ninth interlayer dielectric film INS9 and is connected to the exposed eighth metal layer ML8. The ninth via hole VA9 is made of one of copper (Cu), aluminum (Al), tungsten (W), molybdenum (Mo), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni) and neodymium (Nd) or an alloy thereof.

[0103] The first reflective electrode RL1 is disposed on the ninth interlayer dielectric film INS9 and connected to the ninth via hole VA9. The first reflective electrode RL1 is made of one of copper (Cu), aluminum (Al), tungsten (W), molybdenum (Mo), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), and neodymium (Nd), or an alloy thereof.

[0104] The second reflective electrode RL2 is disposed on the first reflective electrode RL1. The second reflective electrode RL2 is made of one of copper (Cu), aluminum (Al), tungsten (W), molybdenum (Mo), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni) and neodymium (Nd), or an alloy or a compound thereof. For example, the second reflective electrode RL2 includes titanium nitride (TiN).

[0105] In the first sub-pixel SP1, the step layer STPL is disposed on the second reflective electrode RL2. The step layer STPL is not disposed in each of the second sub-pixel SP2 and the third sub-pixel SP3. The thickness of the step layer STPL is determined based on the wavelength of the light of the first color and the distance from the first emission layer to the fourth reflective electrode RL4, so that the light of the first color emitted from the first emission layer of the first sub-pixel SP1 is reflected. The step layer STPL is made of silicon carbon nitride (SiCN) or silicon oxide (SiO x ) type inorganic film formation, but not limited to this.

[0106] In the first sub-pixel SP1, the third reflective electrode RL3 is disposed on the second reflective electrode RL2 and the step layer STPL. In the second sub-pixel SP2 and the third sub-pixel SP3, the third reflective electrode RL3 is disposed on the second reflective electrode RL2. The third reflective electrode RL3 is made of one of copper (Cu), aluminum (Al), tungsten (W), molybdenum (Mo), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), and neodymium (Nd), or an alloy thereof.

[0107] In an embodiment, at least one of the first reflective electrode RL1, the second reflective electrode RL2, and the third reflective electrode RL3 may be omitted.

[0108] The fourth reflective electrode RL4 is disposed on the third reflective electrode RL3. The fourth reflective electrode RL4 reflects light from the intermediate layer of the first to third sub-pixels SP1, SP2, and SP3. The fourth reflective electrode RL4 includes a highly reflective metal so that light can be reflected. The fourth reflective electrode RL4 is formed of one of aluminum (Al), a stack of aluminum and titanium (Ti / Al / Ti), a stack of aluminum and ITO (ITO / Al / ITO), silver (Ag), palladium (Pd), an APC alloy which is an alloy of copper (Cu), and a stack of an APC alloy and ITO (ITO / APC / ITO), but is not necessarily limited thereto.

[0109] The tenth interlayer dielectric film INS10 is disposed on the ninth interlayer dielectric film INS9 and the fourth reflective electrode RL4. The tenth interlayer dielectric film INS10 is made of silicon oxide (SiO x )-type inorganic film is formed, but the embodiments of the present disclosure are not necessarily limited thereto.

[0110] Each of the tenth via holes VA10 penetrates the tenth interlayer dielectric film INS10 and is connected to the fourth reflective electrode RL4. The tenth via hole VA10 includes one of copper (Cu), aluminum (Al), tungsten (W), molybdenum (Mo), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), and neodymium (Nd), or an alloy thereof. Due to the step layer STPL, the thickness of the tenth via hole VA10 in the first sub-pixel SP1 is less than the thickness of the tenth via hole VA10 in each of the second sub-pixel SP2 and the third sub-pixel SP3.

[0111] The emission material layer EML is disposed on the emission material back plate EBP. The emission material layer EML includes light emitting elements LE and a pixel defining layer PDL, and each of the light emitting elements LE includes a first electrode AND, an intermediate layer IL and a second electrode CAT.

[0112] The first electrode AND of each of the light emitting elements LE is disposed on the tenth interlayer dielectric film INS10 and is connected to the tenth via VA10. The first electrode AND of each of the light emitting elements LE is connected to one of the drain area DA and the source area SA of the pixel transistor PTR through the tenth via VA10, the first reflective electrode RL1 to the fourth reflective electrode RL4, the first via VA1 to the ninth via VA9, the first metal layer ML1 to the eighth metal layer ML8, and the contact terminal CTE. The first electrode AND of each of the light emitting elements LE includes one of copper (Cu), aluminum (Al), tungsten (W), molybdenum (Mo), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), and neodymium (Nd), or an alloy or a compound thereof. For example, the first electrode AND of each of the light emitting elements LE includes titanium nitride (TiN).

[0113] The pixel defining film PDL is partially disposed on the first electrode AND of each of the light emitting elements LE. The pixel defining film PDL covers the edge of the first electrode AND of each of the light emitting elements LE. The pixel defining film PDL divides the first emission area EA1, the second emission area EA2, and the third emission area EA3.

[0114] The first emission area EA1 is an area where the first electrode AND, the intermediate layer IL, and the second electrode CAT in the first sub-pixel SP1 are sequentially stacked with each other to emit light. The second emission area EA2 is an area where the first electrode AND, the intermediate layer IL, and the second electrode CAT in the second sub-pixel SP2 are sequentially stacked with each other to emit light. The third emission area EA3 is an area where the first electrode AND, the intermediate layer IL, and the second electrode CAT in the third sub-pixel SP3 are sequentially stacked with each other to emit light.

[0115] The pixel definition film PDL includes a first pixel definition film PDL1, a second pixel definition film PDL2, and a third pixel definition film PDL3. The first pixel definition film PDL1 is disposed on the edge of the first electrode AND of each of the light emitting elements LE, the second pixel definition film PDL2 is disposed on the first pixel definition film PDL1, and the third pixel definition film PDL3 is disposed on the second pixel definition film PDL2. The first pixel definition film PDL1, the second pixel definition film PDL2, and the third pixel definition film PDL3 include silicon oxide (SiO x ) type inorganic film, but the embodiments of the present disclosure are not necessarily limited thereto.

[0116] The intermediate layer IL includes a first intermediate layer IL1 , a second intermediate layer IL2 , and a third intermediate layer IL3 .

[0117] The intermediate layer IL has a tandem structure including a plurality of intermediate layers IL1, IL2, and IL3 emitting light of different colors. For example, the intermediate layer IL includes a first intermediate layer IL1 emitting light of a first color, a second intermediate layer IL2 emitting light of a second color, and a third intermediate layer IL3 emitting light of a third color. The first intermediate layer IL1, the second intermediate layer IL2, and the third intermediate layer IL3 are sequentially stacked on each other.

[0118] The first intermediate layer IL1 has a structure including a first hole transport layer, a first organic emission layer emitting light of a first color, and a first electron transport layer sequentially stacked on each other. The second intermediate layer IL2 has a structure including a second hole transport layer, a second organic emission layer emitting light of a second color, and a second electron transport layer sequentially stacked on each other. The third intermediate layer IL3 has a structure including a third hole transport layer, a third organic emission layer emitting light of a third color, and a third electron transport layer sequentially stacked on each other.

[0119] The intermediate layer IL covers the first electrode AND at the opening of the pixel defining film PDL, covers the pixel defining film PDL between the adjacent sub-pixels SP1 , SP2 , and SP3 , and is partially disconnected.

[0120] According to an embodiment, by disconnecting the intermediate layer IL between adjacent sub-pixels SP1, SP2, and SP3, leakage current between adjacent sub-pixels SP1, SP2, and SP3 can be prevented, and color crosstalk can be prevented. Color crosstalk refers to a phenomenon in which, for example, a red sub-pixel adjacent to a blue sub-pixel is unexpectedly turned on when a blue sub-pixel emits blue light. Since color crosstalk occurs due to leakage current, if a blue sub-pixel and a red sub-pixel having a large difference in driving voltage are adjacent to each other, color crosstalk may occur. For example, when a driving current is supplied to a light-emitting element of a blue sub-pixel to turn on the blue sub-pixel, a portion of the driving current may be transmitted to the red sub-pixel through at least some conductive layers in the intermediate layer IL, which is a leakage current. If a leakage current is generated, then, when the blue sub-pixel is turned on, the red sub-pixel may be turned on unexpectedly.

[0121] The number of intermediate layers IL1, IL2, and IL3 emitting light of different colors is not limited to Figure 5 . For example, in some embodiments, the intermediate layer IL includes two intermediate layers. For example, one of the two intermediate layers is substantially the same as the first intermediate layer IL1, and the other includes a second hole transport layer, a second organic emission layer, a third organic emission layer, and a second electron transport layer. For example, a charge generation layer is disposed between the two intermediate layers to supply electrons to one intermediate layer and supply charges to the other intermediate layer.

[0122] Furthermore, although the first to third intermediate layers IL1, IL2, and IL3 are all provided Figure 5 In the first emission area EA1, the second emission area EA2 and the third emission area EA3, but the embodiments of the present disclosure are not necessarily limited to this. For example, in some embodiments, the first intermediate layer IL1 is disposed in the first emission area EA1, but is not disposed in the second emission area EA2 and the third emission area EA3. In addition, in some embodiments, the second intermediate layer IL2 is disposed in the second emission area EA2, but is not disposed in the first emission area EA1 and the third emission area EA3. In addition, in some embodiments, the third intermediate layer IL3 is disposed in the third emission area EA3, but is not disposed in the first emission area EA1 and the second emission area EA2. For example, the first to third color filters CF1, CF2 and CF3 of the optical layer OPL can be omitted.

[0123] The second electrode CAT is disposed on the third intermediate layer IL3. The second electrode CAT includes a transparent conductive material (TCP) capable of transmitting light such as ITO or IZO, or a semi-transparent conductive material such as magnesium (Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag). When the second electrode CAT is formed of the semi-transmissive conductive material, light extraction efficiency is improved by using a microcavity in each of the first to third subpixels SP1, SP2, and SP3.

[0124] The encapsulation layer TFE is disposed on the emission material layer EML. The encapsulation layer TFE includes one or more inorganic films TFE1 and TFE3 that prevent oxygen or moisture from penetrating into the emission material layer EML. In addition, the encapsulation layer TFE includes at least one organic film that protects the emission material layer EML from particles such as dust. For example, the encapsulation layer TFE may include a first inorganic encapsulation film TFE1, an organic encapsulation film TFE2, and a second inorganic encapsulation film TFE3.

[0125] The first inorganic encapsulation film TFE1 is disposed on the second electrode CAT, the organic encapsulation film TFE2 is disposed on the first inorganic encapsulation film TFE1, and the second inorganic encapsulation film TFE3 is disposed on the organic encapsulation film TFE2. The first inorganic encapsulation film TFE1 and the second inorganic encapsulation film TFE3 each include a plurality of inorganic layers including silicon nitride (SiN) alternately stacked on each other. x ) layer, silicon oxynitride (SiON) layer, silicon oxide (SiO x ) layer, titanium oxide (TiO x ) layer and aluminum oxide (AlO x ) layer. The organic encapsulation film TFE2 is a monomer. However, in some embodiments, the organic encapsulation film TFE2 includes at least one of acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, and the like.

[0126] The adhesive layer ADL bonds the encapsulation layer TFE to the optical layer OPL. The adhesive layer ADL is a double-sided adhesive member. In addition, the adhesive layer ADL is a transparent adhesive member such as a transparent adhesive, a transparent adhesive resin.

[0127] The optical layer OPL includes a plurality of color filters CF1, CF2, and CF3, a plurality of lenses LNS, and a filling layer FIL. The plurality of color filters CF1, CF2, and CF3 include first to third color filters CF1, CF2, and CF3. The first to third color filters CF1, CF2, and CF3 are disposed on the adhesive layer ADL.

[0128] The first color filter CF1 is aligned with the first emission area EA1 of the first subpixel SP1. The first color filter CF1 transmits light of a first color, such as light in a blue wavelength range. The blue wavelength range is about 370nm to 460nm. Therefore, the first color filter CF1 transmits light of a first color in the light emitted from the first emission area EA1.

[0129] The second color filter CF2 is aligned with the second emission area EA2 of the second sub-pixel SP2. The second color filter CF2 transmits light of a second color, such as light in a green wavelength range. The green wavelength range is about 480nm to 560nm. Therefore, the second color filter CF2 transmits light of a second color in the light emitted from the second emission area EA2.

[0130] The third color filter CF3 is aligned with the third emission area EA3 of the third sub-pixel SP3. The third color filter CF3 transmits light of a third color, such as light in a red wavelength range. The red wavelength range is about 600nm to 750nm. Therefore, the third color filter CF3 transmits light of a third color in the light emitted from the third emission area EA3.

[0131] The lenses LNS are disposed on the first, second, and third color filters CF1, CF2, and CF3. Each of the lenses LNS increases the ratio of light toward the front side of the display device 10. Each of the lenses LNS has a cross-sectional shape that is convex upward.

[0132] The filling layer FIL is disposed on the plurality of lenses LNS. The filling layer FIL has a predetermined refractive index so that light travels in a third direction DR3 at an interface between the plurality of lenses LNS and the filling layer FIL. In addition, the filling layer FIL is a planarization layer. The filling layer FIL includes an organic film including at least one of an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, and a polyimide resin.

[0133] The cover layer CVL is disposed on the filling layer FIL. The cover layer CVL is one of a glass substrate and a polymer such as a resin. If the cover layer CVL is a glass substrate, it is attached to the filling layer FIL. For example, the filling layer FIL adheres to the cover layer CVL. If the cover layer CVL is a glass substrate, it serves as a packaging substrate. If the cover layer CVL is a polymer such as a resin, it is directly applied to the filling layer FIL.

[0134] A polarizer may be provided on the surface of the cover layer CVL. The polarizer prevents degradation of visibility due to reflection of external light. The polarizer includes a linear polarizer and a phase delay film. For example, the phase delay film is a λ / 4 wave plate (quarter wave plate), but the embodiments of the present disclosure are not necessarily limited thereto. If visibility can be sufficiently improved by the first to third color filters CF1, CF2, and CF3 regardless of reflection of external light, the polarizer may be omitted.

[0135] Figure 6 The image distortion is shown depending on the position of the optical sweet spot of the lens.

[0136] Reference Figure 6 In an embodiment, in a display device 610 such as a head mounted display (HMD) device or AR glasses, a first display device (such as Figure 2 The first display device 10_1 in the embodiment is placed on the first eyepiece 611, and the second display device (such as Figure 2 The second display device 10_2 in the embodiment is placed on the second eyepiece 612. Figure 6 In the embodiment, the eccentric structure is applied to the lens in the first display device 10_1, but the eccentric structure is not applied to the lens in the second display device 10_2.

[0137] The eccentric structure has an impact on display panels (such as Figure 4 The display panel 410) has a lens (such as Figure 5 The position of the optical best point of the lens LNS is corrected. If the eccentric structure is not used, the optical best point of the lens is aligned with the center of the display panel 410. When the eccentric structure is used, the optical best point of the lens LNS is offset by a predetermined distance from the center of the display panel 410 and aligned. The eccentric structure of the lens LNS causes the optical best point of the lens LNS to be offset to a position that prevents image distortion, rather than the geometric center of the lens LNS.

[0138] exist Figure 6 , a left-eye image 621 is displayed by the first display device 10_1 to provide a real-world image 601 captured by a camera to the left eye of the user. The left-eye image 621 is provided by the first display device 10_1 using an off-center structure.

[0139] exist Figure 6 , a right-eye image 622 is displayed by the second display device 10_2 to provide the real-world image 601 captured by the camera to the right eye of the user. The right-eye image 622 is an image provided by the second display device 10_2 that does not use an eccentric structure.

[0140] Will Figure 6, the left eye image 621 provided by the first display device 10_1 using the eccentric structure has no image distortion. In contrast, it can be seen that the right eye image 622 provided by the second display device 10_2 not using the eccentric structure has image distortion similar to the fisheye effect as indicated by the virtual grid lines 6111. Such image distortion may cause headaches, eye fatigue, and poor vision. According to an embodiment, as will be described below with reference to Figures 8 to 15 As described, in order to prevent the image distortion as described above, a decentering structure is applied to the lens LNS of the display panel.

[0141] Figure 7 A display device according to a comparative example in which a decentering structure for correcting the optical sweet spot is not applied is shown.

[0142] Reference Figure 7 , the display device according to the comparative example includes a first display device 10_1 that provides an image to a left eye of a user and a second display device 10_2 that provides an image to a right eye of a user.

[0143] The first display device 10_1 includes a first display panel 411 and a first circuit board 431. The first circuit board 431 includes a first driving circuit (such as a first driving circuit) for driving the first display panel 411. Figure 4 The driving circuit 440 in FIG. 4 is shown in FIG. 4A . Figure 5 As described, the first display panel 411 includes a first emission material layer (such as Figure 5 The emission material layer EML in the Figure 5 The first optical layer OPL in the embodiment includes a first lens (such as a lens element) disposed on the first emission material layer. Figure 5 The lens LNS in the Figure 7 , a circular dotted line positioned inside the first display panel 411 indicates an arrangement of the first lens in the first display panel 411 .

[0144] The second display device 10_2 includes a second display panel 412 and a second circuit board 432. The second circuit board 432 includes a second driving circuit (such as a second driving circuit) for driving the second display panel 412. Figure 4 The driving circuit 440 in FIG. 4 is shown in FIG. 4A . Figure 5 As described, the second display panel 412 includes a second emission material layer (such as Figure 5 The emission material layer EML in the second optical layer (such as Figure 5 The second optical layer OPL in the embodiment includes a second lens (such as a lens) disposed on the second emission material layer. Figure 5 The lens LNS in the Figure 7, a circular dotted line positioned inside the second display panel 412 indicates an arrangement of a second lens in the second display panel 412 .

[0145] In the display device according to the comparative example, both the first display device 10_1 and the second display device 10_2 do not include an eccentric structure. For example, the center 411C of the first display panel 411 is aligned so that it overlaps with the first optical optimal point OPL1_C of the first optical layer. Therefore, when viewed from above, the center 411C of the first display panel 411 coincides with the first optical optimal point OPL1_C of the first optical layer. In addition, the center 412C of the second display panel 412 is aligned so that it overlaps with the second optical optimal point OPL2_C of the second optical layer. Therefore, when viewed from above, the center 412C of the second display panel 412 coincides with the second optical optimal point OPL2_C of the second optical layer.

[0146] The display device according to the comparative example has Figure 6 The right eye image 622 in FIG. 1 is similar to an image distortion similar to a fish-eye effect and may cause headaches, eye fatigue, and poor vision.

[0147] Figure 8 A display device according to an embodiment using a decentering structure for correcting the position of an optical sweet spot is shown. Fig. 9 is a cross-sectional view of the alignment of a central lens positioned at an optical sweet spot with sub-pixels SP1, SP2, and SP3. Fig.10 is a cross-sectional view of the alignment of a first radius lens positioned at a first radial distance from the optical sweet spot with sub-pixels SP1, SP2, and SP3. Fig.11 is a cross-sectional view of the alignment of a second radius lens positioned at a second radial distance from the optical sweet spot with sub-pixels SP1, SP2, and SP3.

[0148] Reference Figure 8 , the display device according to the embodiment includes a first display device 10_1 providing an image to a left eye of a user and a second display device 10_2 providing an image to a right eye of a user.

[0149] The first display device 10_1 includes a first display panel 411 and a first circuit board 431. The first circuit board 431 includes a first driving circuit (such as a first driving circuit) for driving the first display panel 411. Figure 4 The driving circuit 440 in FIG. 4 is shown in FIG. 4A . Figure 5 As described, the first display panel 411 includes a first emission material layer (such as Figure 5 The emission material layer EML in the Figure 5 The first optical layer OPL in the embodiment includes a first lens (such as a lens element) disposed on the first emission material layer. Figure 5The lens LNS in the Figure 8 , a circular dotted line positioned inside the first display panel 411 indicates an arrangement of the first lens in the first display panel 411 .

[0150] The second display device 10_2 includes a second display panel 412 and a second circuit board 432. The second circuit board 432 includes a second driving circuit (such as a second driving circuit) for driving the second display panel 412. Figure 4 The driving circuit 440 in FIG. 4 is shown in FIG. 4A . Figure 5 As described, the second display panel 412 may include a second emission material layer (such as Figure 5 The emission material layer EML in the second optical layer (such as Figure 5 The optical layer OPL in the embodiment of the present invention comprises a second lens disposed on the second emission material layer. Figure 8 , a circular dotted line positioned inside the second display panel 412 indicates an arrangement of a second lens included in the second display panel 412 .

[0151] In the display device according to the embodiment, each of the first display device 10_1 and the second display device 10_2 includes an eccentric structure. For example, the center 411C of the first display panel 411 does not overlap with the first optical optimal point OPL1_C of the first optical layer. The first optical optimal point OPL1_C is offset from the center 411C of the first display panel 411 by a predetermined distance. For example, the first optical optimal point OPL1_C is offset from the center 411C of the first display panel 411 by a predetermined distance in the X2 direction. For example, the center 412C of the second display panel 412 does not overlap with the second optical optimal point OPL2_C of the second optical layer. The second optical optimal point OPL2_C is offset from the center 412C of the second display panel 412 by a predetermined distance. For example, the second optical optimal point OPL2_C is offset from the center 412C of the second display panel 412 by a predetermined distance in the X1 direction opposite to the X2 direction. Therefore, the first lens of the first optical layer and the second lens of the second optical layer are relative to the center (such as the center) between the first display device 10_1 and the second display device 10_2. Figure 2 The center 201) is arranged symmetrically.

[0152] The display device according to the embodiment can prevent Figure 6 The image distortion similar to the fisheye effect shown in the right eye image 622.

[0153] Hereinafter, alignment of the sub-pixels SP1, SP2, and SP3 of the display panel 410 and the lens LNS according to the offset movement of the optical best point with respect to the center of the first display device 10_1 will be described.

[0154] Reference Figure 8 and Fig. 9 In an embodiment, a first central lens 901 of the first lens corresponding to a periphery 811 of the first optical best point OPL1_C is aligned with the centers of the sub-pixels SP1, SP2, and SP3. The periphery 811 of the first optical best point OPL1_C is an area within a predetermined radial distance from the first optical best point OPL1_C.

[0155] Reference Figure 8 and Fig.10 In an embodiment, a first radius lens 902 in the first lens positioned at a first radius distance D1 from the first optical optimal point OPL1_C is offset and aligned by a first distance L1 from the center of the sub-pixels SP1, SP2 and SP3 of the first emission material layer EML.

[0156] Reference Figure 8 and Fig.11 In an embodiment, a second radius lens 903 in the first lens positioned at a second radius distance D2 from the first optical optimal point OPL1_C is offset and aligned by a second distance L2 from the center of the sub-pixels SP1, SP2 and SP3 of the first emission material layer EML, and the second radius distance D2 is greater than the first radius distance D1.

[0157] The first radius lens 902 positioned at a first radius distance D1 from the first optical best point OPL1_C and the second radius lens 903 positioned at a second radius distance D2 from the first optical best point OPL1_C may be referred to as peripheral lenses. For example, the first lens provided in the first display device 10_1 includes a first central lens 901 provided in a periphery 811 of the first optical best point OPL1_C and first peripheral lenses 902 and 903 provided outside the first central lens 901. In addition, according to the distance from the first optical best point OPL1_C, the first peripheral lenses 902 and 903 include a first radius lens 902 provided in a periphery 812 of the first optical best point OPL1_C, a second radius lens 903 provided in a periphery 813 of the first optical best point OPL1_C, and a third radius lens. The distance at which the first peripheral lenses 902 and 903 are offset from the centers of the sub-pixels SP1, SP2, and SP3 increases in proportion to the distance from the first optical best point OPL1_C.

[0158] Fig.12 is a view comparing the field of view (FoV) of a user with and without a decentering structure for correcting the position of the optical sweet spot.

[0159] Reference Fig.12 In an embodiment, the user's field of view (FoV) may be extended by using a decentering structure for correcting the position of the optical sweet spot.

[0160] exist Fig.12 In the table shown in , the first column C1 represents the user's field of view (FoV) when the eccentric structure is not applied to the first display device 10_1 or the second display device 10_2. As shown in the figure, when the eccentric structure is not applied to the first display device 10_1 or the second display device 10_2, the user's field of view (FoV) is about 83 degrees.

[0161] exist Fig.12 In the table shown in , the second column C2 represents the field of view (FoV) of the user when the decentered structure is applied to each of the first display device 10_1 and the second display device 10_2. As shown in the figure, when the decentered structure is applied to each of the first display device 10_1 and the second display device 10_2, the field of view (FoV) of the user is about 92.4 degrees. Therefore, by using the decentered structure for each of the first display device 10_1 and the second display device 10_2, an image with a wide field of view (FoV) can be provided to the user.

[0162] Figures 13 to 15 Various embodiments are shown in which a circuit board of the first display device 10_1 and a circuit board of the second display device 10_2 are symmetrically arranged.

[0163] according to Figure 8 In the embodiment of the present invention, the first display device 10_1 should be manufactured so that the first optical optimal point OPL1_C is offset from the center 411C of the first display panel 411 by a predetermined distance in the X2 direction, and the second display device 10_2 should be manufactured so that the second optical optimal point OPL2_C is offset from the center 412C of the second display panel 412 by a predetermined distance in the X1 direction opposite to the X2 direction. Figure 8 In the embodiment, the first display device 10_1 and the second display device 10_2 should be manufactured separately, which may increase the cost.

[0164] According to an embodiment of the present disclosure, by manufacturing a pair of identical display devices 10_1 and 10_2, an image without distortion can be provided to each of the left eye and the right eye of the user without designing the first display device 10_1 and the second display device 10_2 differently. To this end, according to an embodiment of the present disclosure, a first display device 10_1 and a second display device 10_2 having the same structure are prepared, and as shown in FIG. Figures 13 to 15 Arranged as shown in .

[0165] according to Figure 8In the embodiment of the present invention, the first driving circuit (such as the first circuit board 431) of the first display device 10_1 is arranged along the Y1 direction from the first display panel 411, and similarly, the second driving circuit (such as the second circuit board 432) of the second display device 10_2 is arranged along the Y1 direction from the second display panel 412. Figure 8 In the embodiment where the first driving circuit is arranged along the Y1 direction from the first display panel 411, the first optical optimum point OPL1_C of the first display panel 411 is offset and aligned in the X2 direction. Figure 8 In the embodiment where the second driving circuit is disposed along the Y1 direction from the second display panel 412, the second optical optimum point OPL2_C of the second display panel 412 is offset and aligned in the X1 direction opposite to the X2 direction.

[0166] According to the embodiments of the present disclosure, Figures 13 to 15 As shown in , considering that the direction in which the first optical optimal point OPL1_C is offset and aligned is opposite to the direction in which the second optical optimal point OPL2_C is offset and aligned, the first drive circuit (such as the first circuit board 431) and the second drive circuit (such as the second circuit board 432) are symmetrically arranged with respect to the center 201 of the housing cover 120. Therefore, although the first display device 10_1 and the second display device 10_2 are manufactured to have substantially the same structure, the first drive circuit and the second drive circuit are symmetrically arranged with respect to the center 201 of the housing cover 120, so that an undistorted image can be provided to each of the left eye and the right eye of the user. Hereinafter, the display device 10_1 and the second display device 10_2 will be described in more detail. Figures 13 to 15 Each of the .

[0167] Reference Fig.13 In the embodiment, the first display device 10_1 includes a first display panel 411 and a first circuit board 431, the first display panel 411 includes a first emission material layer and a first optical layer, and the first circuit board 431 is arranged along the first direction X1 from the first display panel 411. The second display device 10_2 includes a second display panel 412 and a second circuit board 432, the second display panel 412 includes a second emission material layer and a second optical layer, and the second circuit board 432 is arranged along the second direction X2 from the second display panel 412.

[0168] The first circuit board 431 of the first display device 10_1 is disposed in the display device housing 110 (see Figure 2 ) from the first eyepiece 131 (see Figure 2 ) is located in the first space along the first direction X1. The second circuit board 432 of the second display device 10_2 is disposed at the side of the display device housing 110 from the second eyepiece 132 (see Figure 2 ) in a second space positioned along a second direction X2 opposite to the first direction X1.

[0169] The first lens of the first optical layer and the second lens of the second optical layer are arranged symmetrically with respect to the center 201 of the housing cover 120 .

[0170] The first optical optimum point OPL1_C of the first optical layer is offset from the center 411C of the first display panel 411 in the second direction X2.

[0171] The second optical optimum point OPL2_C of the second optical layer is offset from the center 412C of the second display panel 412 in the first direction X1 opposite to the second direction X2.

[0172] according to Fig.13 In the embodiment, the first direction X1 points from the first display panel 411 to the center 201 of the housing cover 120. The second direction X2 points from the second display panel 412 to the center 201 of the housing cover 120. The second direction X2 is opposite to the first direction X1. The first direction X1 is opposite to the second direction X2.

[0173] Reference Fig.14 In the embodiment, the first display device 10_1 includes a first display panel 411 and a first circuit board 431, the first display panel 411 includes a first emission material layer and a first optical layer, and the first circuit board 431 is arranged along the second direction X2 from the first display panel 411. The second display device 10_2 includes a second display panel 412 and a second circuit board 432, the second display panel 412 includes a second emission material layer and a second optical layer, and the second circuit board 432 is arranged along the first direction X1 from the second display panel 412.

[0174] The first circuit board 431 of the first display device 10_1 is disposed in the display device housing 110 (see Figure 2 ) from the first eyepiece 131 (see Figure 2 ) is located in the first space along the second direction X2. The second circuit board 432 of the second display device 10_2 is disposed at the side of the display device housing 110 from the second eyepiece 132 (see Figure 2 ) in a second space positioned along the first direction X1 opposite to the second direction X2.

[0175] The first lens of the first optical layer and the second lens of the second optical layer are arranged symmetrically with respect to the center 201 of the housing cover 120 .

[0176] The first optical optimum point OPL1_C of the first optical layer is offset from the center 411C of the first display panel 411 in the second direction X2.

[0177] The second optical optimum point OPL2_C of the second optical layer is offset from the center 412C of the second display panel 412 in the first direction X1 opposite to the second direction X2.

[0178] according to Fig.14 In the embodiment of the present invention, the second direction X2 is directed from the center 201 of the housing cover 120 to the first display panel 411 . The first direction X1 is directed from the center 201 of the housing cover 120 to the second display panel 412 .

[0179] Reference Fig.15 The first display device 10_1 includes a first display panel 411 and a first circuit board 431, the first display panel 411 includes a first emission material layer and a first optical layer, and the first circuit board 431 is arranged along the third direction Y1 from the first display panel 411. The second display device 10_2 includes a second display panel 412 and a second circuit board 432, the second display panel 412 includes a second emission material layer and a second optical layer, and the second circuit board 432 is arranged along the fourth direction Y2 from the second display panel 412.

[0180] The first circuit board 431 of the first display device 10_1 is disposed in a first space of the display device housing 110 located along the third direction Y1 from the first eyepiece 131. The second circuit board 432 of the second display device 10_2 is disposed in a second space of the display device housing 110 located along a fourth direction Y2 opposite to the third direction Y1 from the second eyepiece 132.

[0181] The first lens of the first optical layer and the second lens of the second optical layer are arranged symmetrically with respect to the center 201 of the housing cover 120 .

[0182] The first optical optimum point OPL1_C of the first optical layer is offset from the center 411C of the first display panel 411 in the second direction X2.

[0183] The second optical optimum point OPL2_C of the second optical layer is offset from the center 412C of the second display panel 412 in the first direction X1 opposite to the second direction X2.

[0184] according to Fig.15 In the embodiment, the third direction Y1 is the upward direction of the housing cover 120. The fourth direction Y2 is the downward direction of the housing cover 120. The second direction X2 points from the center 201 of the housing cover 120 to the first display panel 411. The first direction X1 points from the center 201 of the housing cover 120 to the second display panel 412.

[0185] According to the head-mounted display device, the glasses-type display device, and the display device having these forms according to the embodiments, by correcting the position of the optical optimum point of the lens array, the field of view can be expanded and image distortion can be reduced.

[0186] Furthermore, according to the embodiments, the head mounted display device, the glasses type display device, and the display devices having these forms have a simple structure, thus reducing the manufacturing cost.

[0187] In summarizing the detailed description, it will be appreciated by those skilled in the art that many changes and modifications may be made to the disclosed embodiments without departing substantially from the principles of the present disclosure. Therefore, the disclosed embodiments disclosed are used only in a general and descriptive sense and not for the purpose of limitation.

Claims

1. A mobile display device, comprising: a first display device that provides an image to a left eye of a user; a second display device, providing an image to the right eye of the user; A display device housing, accommodating the first display device and the second display device; as well as a housing cover covering a surface of the display device housing and comprising a first eyepiece aligned with the first display device and a second eyepiece aligned with the second display device, wherein each of the first display device and the second display device comprises a display panel and a circuit board, the display panel comprises an emission material layer and an optical layer, the optical layer comprises a lens disposed on the emission material layer, the circuit board is disposed at one end of the display panel and comprises a driving circuit for driving the display panel, and The circuit board of the first display device and the circuit board of the second display device are arranged symmetrically with respect to the center of the housing cover between the first eyepiece and the second eyepiece.

2. The mobile display device according to claim 1, in, The first circuit board of the first display device is disposed in a first space of the display device housing located in a first direction from the first eyepiece, and The second circuit board of the second display device is arranged in a second space of the display device housing, which is located from the second eyepiece along a second direction opposite to the first direction.

3. The mobile display device according to claim 2, in, The first display device includes a first display panel and the first circuit board, the first display panel includes a first emission material layer and a first optical layer, the first circuit board is arranged along the first direction from the first display panel, and The second display device includes a second display panel and the second circuit board, the second display panel includes a second emission material layer and a second optical layer, and the second circuit board is arranged along the second direction from the second display panel.

4. The mobile display device according to claim 3, wherein: The first lenses of the first optical layer and the second lenses of the second optical layer are arranged symmetrically with respect to the center of the housing cover.

5. The mobile display device according to claim 4, in, A first optical optimum point of the first optical layer is offset from a center of the first display panel in a third direction, and The second optical optimum point of the second optical layer is offset from the center of the second display panel in a fourth direction opposite to the third direction.

6. The mobile display device according to claim 5, wherein: The first lens comprises: a first central lens associated with the first optical sweet spot and aligned with the center of a sub-pixel of the first layer of emissive material; and A first peripheral lens is disposed outside the first central lens and is offset from the center of the sub-pixel of the first emission material layer by a predetermined distance.

7. The mobile display device according to claim 6, wherein: The predetermined distance of the first peripheral lens increases as the first peripheral lens is away from the first optical optimal point.

8. The mobile display device according to claim 7, wherein: The first peripheral lens comprises: a first radius lens positioned at a first radial distance from the first optical sweet spot and offset and aligned a first distance from the center of the sub-pixel; and A second radius lens is positioned at a second radial distance from the first optical sweet spot and is offset and aligned a second distance from the center of the sub-pixel, the second radial distance being greater than the first radial distance.

9. The mobile display device according to claim 5, in, The first direction is a direction from the first display panel to the center of the housing cover, Wherein, the second direction is a direction from the second display panel to the center of the housing cover, wherein the third direction is opposite to the first direction, and Wherein, the fourth direction is opposite to the second direction.

10. The mobile display device according to claim 5, in, The first direction and the third direction are directions from the center of the housing cover toward the first display panel, and The second direction and the fourth direction are directions from the center of the housing cover toward the second display panel.

11. The mobile display device according to claim 5, wherein: The first direction is an upward direction of the housing cover, The second direction is a downward direction of the housing cover, The third direction is directed from the center of the housing cover to the first display panel, and The fourth direction is directed from the center of the housing cover toward the second display panel.

12. The mobile display device according to claim 1, wherein: The mobile display device is one of a head-mounted display device and a glasses-type display device that provide virtual reality or augmented reality.

13. A head-mounted display device, comprising: a first display device that provides an image to a left eye of a user; a second display device, providing an image to the right eye of the user; A display device housing, accommodating the first display device and the second display device; as well as a housing cover covering a surface of the display device housing and comprising a first eyepiece aligned with the first display device and a second eyepiece aligned with the second display device, wherein each of the first display device and the second display device comprises a display panel and a circuit board, the display panel comprises an emission material layer and an optical layer, the optical layer comprises a lens disposed on the emission material layer, the circuit board is disposed at one end of the display panel and comprises a driving circuit for driving the display panel, and The circuit board of the first display device and the circuit board of the second display device are arranged symmetrically with respect to the center of the housing cover between the first eyepiece and the second eyepiece.

14. The head mounted display device according to claim 13, wherein: The first circuit board of the first display device is disposed in a first space of the display device housing located in a first direction from the first eyepiece, and The second circuit board of the second display device is disposed in a second space of the display device housing located in a second direction opposite to the first direction from the second eyepiece.

15. The head mounted display device according to claim 14, in, The first display device includes a first display panel and the first circuit board, the first display panel includes a first emission material layer and a first optical layer, the first circuit board is arranged along the first direction from the first display panel, and The second display device includes a second display panel and the second circuit board, the second display panel includes a second emission material layer and a second optical layer, and the second circuit board is arranged along the second direction from the second display panel.

16. The head mounted display device according to claim 15, wherein: The first lenses of the first optical layer and the second lenses of the second optical layer are arranged symmetrically with respect to the center of the housing cover.

17. A glasses-type display device, comprising: a first display device that provides an image to a left eye of a user; a second display device, providing an image to the right eye of the user; A display device housing, accommodating the first display device and the second display device; as well as a housing cover covering a surface of the display device housing and comprising a first eyepiece aligned with the first display device and a second eyepiece aligned with the second display device, wherein each of the first display device and the second display device comprises a display panel and a circuit board, the display panel comprises an emission material layer and an optical layer, the optical layer comprises a lens disposed on the emission material layer, the circuit board is disposed at one end of the display panel and comprises a driving circuit for driving the display panel, and The circuit board of the first display device and the circuit board of the second display device are arranged symmetrically with respect to the center of the housing cover between the first eyepiece and the second eyepiece.

18. The glasses-type display device according to claim 17, wherein: The first circuit board of the first display device is disposed in a first space of the display device housing located in a first direction from the first eyepiece, and The second circuit board of the second display device is disposed in a second space of the display device housing located in a second direction opposite to the first direction from the second eyepiece.

19. The glasses-type display device according to claim 18, in, The first display device includes a first display panel and the first circuit board, the first display panel includes a first emission material layer and a first optical layer, the first circuit board is arranged along the first direction from the first display panel, and The second display device includes a second display panel and the second circuit board, the second display panel includes a second emission material layer and a second optical layer, and the second circuit board is arranged along the second direction from the second display panel.

20. The glasses-type display device according to claim 19, wherein: The first lenses of the first optical layer and the second lenses of the second optical layer are arranged symmetrically with respect to the center of the housing cover.

Images