Display device

Abstract

To provide a display device in which integration is improved.SOLUTION: A display device includes: a first pixel for radiating a first light signal; a second pixel that is adjacent to the first pixel in a first direction and radiates a second light signal; a third pixel for radiating a third light signal; a fourth pixel that is adjacent to the third pixel in the first direction and radiates a fourth light signal; and an optical section for reflecting the first to fourth light signals. The second pixel and the third pixel are disposed between the first pixel and the fourth pixel, the first light signal and the third light signal are radiated from the first area of the optical section, the second light signal and the fourth light signal are radiated from the second area of the optical section, and the first area and the second area are separated mutually.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] Embodiments of the present invention concept relate to a display device, and more particularly, to a display device including an optical unit that overlaps a pixel array.

Background Art

[0002] A display device is a device for displaying images in electronic devices such as smartphones, notebook computers, and navigation systems. The display device generates an image and provides the generated image to a user via a screen.

[0003] Recently, mobility-based electronic devices have been widely used. Accordingly, various studies have been conducted on display devices that can be miniaturized.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Embodiments of the present invention concept aim to provide a display device with improved integration.

Means for Solving the Problems

[0005] A display device according to some embodiments includes a first pixel that emits a first optical signal, a second pixel that is adjacent to the first pixel in a first direction and emits a second optical signal, a third pixel that emits a third optical signal, a fourth pixel that is adjacent to the third pixel in the first direction and emits a fourth optical signal, and an optical unit that reflects the first to fourth optical signals. The second pixel and the third pixel are disposed between the first pixel and the fourth pixel. The first optical signal and the third optical signal are emitted from a first region of the optical unit, the second optical signal and the fourth optical signal are emitted from a second region of the optical unit, and the first region and the second region may be spaced apart from each other.

[0006] A display device according to an embodiment includes a first pixel that emits a first optical signal, a second pixel that is adjacent to the first pixel in a first direction and emits a second optical signal, a third pixel that emits a third optical signal, a fourth pixel that is adjacent to the third pixel in the first direction and emits a fourth optical signal, and an optical unit that reflects the first to fourth optical signals, wherein the second pixel and the third pixel are disposed between the first pixel and the fourth pixel, and the optical unit includes: a first reflector that overlaps the first pixel in a second direction and is spaced apart from the first pixel and the second pixel in the second direction; and a second reflector that overlaps the third pixel in the second direction and is spaced apart from the third pixel and the fourth pixel in the second direction, and the second direction may intersect the first direction.

[0007] A display device according to an embodiment includes a substrate, a first pixel, a second pixel, a third pixel, a fourth pixel, a fifth pixel, and a sixth pixel disposed on the substrate, a first outer pixel, a second outer pixel, a third outer pixel, a fourth outer pixel, a fifth outer pixel, and a sixth outer pixel, wherein the first pixel and the second pixel are disposed between the first outer pixel and the second outer pixel, the third pixel and the fourth pixel are disposed between the third outer pixel and the fourth outer pixel, the fifth pixel and the sixth pixel are disposed between the fifth outer pixel and the sixth outer pixel, the second outer pixel and the third outer pixel are adjacent to each other in a first direction, the fourth outer pixel and the fifth outer pixel are adjacent to each other in the first direction, each of the first and second pixels may emit an optical signal including light in a first wavelength region, each of the third and fourth pixels may emit an optical signal including light in a second wavelength region, and each of the fifth and sixth pixels may emit an optical signal including light in a third wavelength region.

Advantages of the Invention

[0008] A display device according to an embodiment of the inventive concept includes an optical unit that changes the traveling direction of an optical signal and may emit optical signals emitted from pixels spaced apart from each other in the same region.

[0009] A display device according to an embodiment of the present invention concept can emit optical signals emitted from pixels spaced apart from each other in the same region, and when arranging pixels on a substrate, pixels that emit light in the same wavelength region can be arranged adjacent to each other. Thereby, the process of forming pixels on the substrate can be simplified.

[0010] A display device according to an embodiment of the present invention concept has a part of reflectors included in the optical unit including a splitter, and an optical signal reflected from one reflector can pass through and proceed to another reflector.

[0011] A display device according to an embodiment of the present invention concept includes outer pixels that do not emit optical signals on the outer periphery of each pixel array, and the pixels that emit optical signals and the optical unit can maintain alignment.

[0012] A display device according to an embodiment of the present invention concept has a part of reflectors including a dichroic mirror, and the wavelength region of the optical signal reflected by each reflector and the wavelength region of the optical signal transmitted are made different, so that the intensity of the optical signal transmitted through the reflector can be relatively large.

[0013] A display device according to an embodiment of the present invention concept includes a path conversion layer, and can reduce the angle between the lower surface of the reflection layer and the upper surface of the substrate. Thereby, the distance between the uppermost part of the reflector and the substrate becomes smaller, and miniaturization of the display device may be possible.

[0014] A display device according to an embodiment of the present invention concept includes a focus conversion layer and can form a multi-focus display. BRIEF DESCRIPTION OF THE DRAWINGS

[0015]

Figure 1a

Figure 1b

Figure 2

Figure 3a

Figure 3b

Figure 4a

Figure 4b

Figure 4c

Figure 4d

Figure 4e

Figure 4f

DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, with reference to the drawings, a display device according to an embodiment of the present invention concept will be described in detail.

[0017] FIG. 1a is a plan view of a display device according to some embodiments. FIG. 1b is a cross-sectional view taken along line I-I' in FIG. 1a.

[0018] Referring to FIGS. 1a and 1b, a substrate 100 may be provided. The substrate 100 may have a plate shape extending along a plane defined by a first direction D1 and a second direction D2. The first direction D1 and the second direction D2 may intersect each other. For example, the first direction D1 and the second direction D2 may be horizontal directions perpendicular to each other.

[0019] In some embodiments, the substrate 100 can be a semiconductor substrate. For example, the substrate 100 can include silicon, germanium, silicon-germanium, GaP, or GaAs. In some embodiments, the substrate 100 can be a semiconductor substrate on which a circuit layer including a CMOS circuit is formed on top. In some embodiments, the circuit layer can include data lines, scan lines, capacitors, and transistors.

[0020] A first pixel array PA1, a second pixel array PA2, and a third pixel array PA3 can be arranged on the substrate 100. The first to third pixel arrays PA1, PA2, PA3 can be arranged in a first direction D1.

[0021] Each of the first to third pixel arrays PA1, PA2, PA3 can include a plurality of pixels arranged in a first direction D1 and a second direction D2. Each of the first to third pixel arrays PA1, PA2, PA3 can include a plurality of outer pixels. The outer pixels can be pixels arranged at the outermost periphery of each of the first to third pixel arrays PA1, PA2, PA3. The outer pixels can surround at least one pixel.

[0022] The first pixel array PA1 can include a first pixel PX1 and a second pixel PX2. The second pixel array PA2 can include a third pixel PX3 and a fourth pixel PX4. The third pixel array PA3 can include a fifth pixel PX5 and a sixth pixel PX6.

[0023] The first pixel array PA1 can include a first outer pixel OP1 and a second outer pixel OP2. The second pixel array PA2 can include a third outer pixel OP3 and a fourth outer pixel OP4. The third pixel array PA3 can include a fifth outer pixel OP5 and a sixth outer pixel OP6.

[0024] The first outer pixel OP1 and the second outer pixel OP2 can be spaced apart from each other in the first direction D1. The third outer pixel OP3 and the fourth outer pixel OP4 can be spaced apart from each other in the first direction D1. The fifth outer pixel OP5 and the sixth outer pixel OP6 can be spaced apart from each other in the first direction D1.

[0025] The first pixel PX1 and the second pixel PX2 can be arranged between the first outer pixel OP1 and the second outer pixel OP2. The third pixel PX3 and the fourth pixel PX4 can be arranged between the third outer pixel OP3 and the fourth outer pixel OP4. The fifth pixel PX5 and the sixth pixel PX6 can be arranged between the fifth outer pixel OP5 and the sixth outer pixel OP6.

[0026] The second pixel PX2 and the third pixel PX3 can be arranged between the first pixel PX1 and the fourth pixel PX4. The fourth pixel PX4 and the fifth pixel PX5 can be arranged between the third pixel PX3 and the sixth pixel PX6.

[0027] The first pixel PX1 and the second pixel PX2 can be adjacent to each other in the first direction D1. The third pixel PX3 and the fourth pixel PX4 can be adjacent to each other in the first direction D1. The fifth pixel PX5 and the sixth pixel PX6 can be adjacent to each other in the first direction D1.

[0028] The upper surface PX1_T of the first pixel PX1 and the upper surface PX2_T of the second pixel PX2 can be coplanar. The upper surface PX3_T of the third pixel PX3 and the upper surface PX4_T of the fourth pixel PX4 can be coplanar. The upper surface PX5_T of the fifth pixel PX5 and the upper surface PX6_T of the sixth pixel PX6 can be coplanar.

[0029] The second outer pixel OP2 and the third outer pixel OP3 can be adjacent to each other in the first direction D1. The fourth outer pixel OP4 and the fifth outer pixel OP5 can be adjacent to each other in the first direction D1.

[0030] The optical unit OPT can be arranged at a level higher than the first to third pixel arrays PA1, PA2, and PA3. The optical unit OPT can be separated from the first to third pixel arrays PA1, PA2, and PA3 in the third direction D3. The third direction D3 can intersect the first direction D1 and the second direction D2. For example, the third direction D3 can be a vertical direction perpendicular to the first direction D1 and the second direction D2.

[0031] The optical unit OPT can be superimposed on the first to third pixel arrays PA1, PA2, and PA3 in the third direction D3.

[0032] The first pixel PX1 can emit a first optical signal OS1 in the third direction D3. The second pixel PX2 can emit a second optical signal OS2 in the third direction D3. The first optical signal OS1 and the second optical signal OS2 can include light in the first wavelength region.

[0033] The third pixel PX3 can emit a third optical signal OS3 in the third direction D3. The fourth pixel PX4 can emit a fourth optical signal OS4 in the third direction D3. The third optical signal OS3 and the fourth optical signal OS4 can include light in the second wavelength region.

[0034] The fifth pixel PX5 can emit a fifth optical signal OS5 in the third direction D3. The sixth pixel PX6 can emit a sixth optical signal OS6 in the third direction D3. The fifth optical signal OS5 and the sixth optical signal OS6 can include light in the third wavelength region.

[0035] In some embodiments, the first wavelength region, the second wavelength region, and the third wavelength region can each be one of the wavelength regions of red, blue, and green. For example, the first wavelength region can be the red wavelength region, the second wavelength region can be the blue wavelength region, and the third wavelength region can be the green wavelength region.

[0036] The first to sixth optical signals OS1, OS2, OS3, OS4, OS5, and OS6 can be incident on the optical unit OPT. The first to sixth optical signals OS1, OS2, OS3, OS4, OS5, and OS6 incident on the optical unit OPT can travel in the third direction D3.

[0037] The optical unit OPT can reflect and emit the incident first to sixth optical signals OS1, OS2, OS3, OS4, OS5, and OS6. The first to sixth optical signals OS1, OS2, OS3, OS4, OS5, and OS6 emitted from the optical unit OPT can travel in the first direction D1.

[0038] The first optical signal OS1, the third optical signal OS3, and the fifth optical signal OS5 emitted from the optical unit OPT can be emitted from the first region OPT_R1 of the optical unit OPT. The first optical signal OS1, the third optical signal OS3, and the fifth optical signal OS5 emitted from the optical unit OPT can be emitted from the same level.

[0039] The second optical signal OS2, the fourth optical signal OS4, and the sixth optical signal OS6 emitted from the optical unit OPT can be emitted from the second region OPT_R2 of the optical unit OPT. The second optical signal OS2, the fourth optical signal OS4, and the sixth optical signal OS6 emitted from the optical unit OPT can be emitted from the same level. In some embodiments, the second region OPT_R2 of the optical unit OPT can be disposed at a higher level than the first region OPT_R1. The first region OPT_R1 and the second region OPT_R2 of the optical unit OPT can be spaced apart from each other in the third direction D3.

[0040] FIG. 2 is a cross-sectional view of a display device according to some embodiments. The display device according to FIG. 2 can be similar to the display device according to FIGS. 1a and 1b except as described below.

[0041] Referring to FIG. 2, the optical unit OPTa can include a first reflector RF1, a second reflector RF2, and a third reflector RF3. The second reflector RF2 can be disposed between the first reflector RF1 and the third reflector RF3. The first reflector RF1, the second reflector RF2, and the third reflector RF3 can be spaced apart from each other.

[0042] The first reflector RF1 can overlap with the first pixel array PA1 in the third direction D3. The first reflector RF1 can overlap with the first pixel PX1 and the second pixel PX2 in the third direction D3. The second reflector RF2 can overlap with the second pixel array PA2 in the third direction D3. The second reflector RF2 can overlap with the third pixel PX3 and the fourth pixel PX4 in the third direction D3. The third reflector RF3 can overlap with the third pixel array PA3 in the third direction D3. The third reflector RF3 can overlap with the fifth pixel PX5 and the sixth pixel PX6 in the third direction D3.

[0043] The lower surface RF1_B of the first reflector RF1 can be inclined with respect to the upper surface of the substrate 100. The lower surface RF1_B of the first reflector RF1 can be inclined with respect to the upper surface PX1_T of the first pixel PX1 and the upper surface PX2_T of the second pixel PX2. The lower surface RF2_B of the second reflector RF2 can be inclined with respect to the upper surface of the substrate 100. The lower surface RF2_B of the second reflector RF2 can be inclined with respect to the upper surface PX3_T of the third pixel PX3 and the upper surface PX4_T of the fourth pixel PX4. The lower surface RF3_B of the third reflector RF3 can be inclined with respect to the upper surface of the substrate 100. The lower surface RF3_B of the third reflector RF3 can be inclined with respect to the upper surface PX5_T of the fifth pixel PX5 and the upper surface PX6_T of the sixth pixel PX6.

[0044] In some embodiments, the first to third reflectors RF1, RF2, RF3 may include a splitter. In some embodiments, the first reflector RF1 may include a mirror, and the second reflector RF2 and the third reflector RF3 may include a splitter. In some embodiments, the first to third reflectors RF1, RF2, RF3 may include a dichroic mirror. For example, the first reflector RF1 can reflect light in the first wavelength region, the second reflector RF2 can reflect light in the second wavelength region, and the third reflector RF3 can reflect light in the third wavelength region.

[0045] The first pixel PX1 can emit a first optical signal OS1a. The second pixel PX2 can emit a second optical signal OS2a. The third pixel PX3 can emit a third optical signal OS3a. The fourth pixel PX4 can emit a fourth optical signal OS4a. The fifth pixel PX5 can emit a fifth optical signal OS5a. The sixth pixel PX6 can emit a sixth optical signal OS6a.

[0046] The first reflector RF1 can reflect the first optical signal OS1a and the second optical signal OS2a. The first reflector RF1 can reflect the first optical signal OS1a and the second optical signal OS2a and emit them in a first direction D1. The second reflector RF2 can reflect the third optical signal OS3a and the fourth optical signal OS4a. The second reflector RF2 can reflect the third optical signal OS3a and the fourth optical signal OS4a and emit them in the first direction D1. The third reflector RF3 can reflect the fifth optical signal OS5a and the sixth optical signal OS6a. The third reflector RF3 can reflect the fifth optical signal OS5a and the sixth optical signal OS6a and emit them in the first direction D1.

[0047] In the first to third reflectors RF1, RF2, RF3, the levels of the regions where the first optical signal OS1a, the third optical signal OS3a, and the fifth optical signal OS5a are reflected can be the same. In the first to third reflectors RF1, RF2, RF3, the levels of the regions where the second optical signal OS2a, the fourth optical signal OS4a, and the sixth optical signal OS6a are reflected can be the same.

[0048] The first optical signal OS1a and the second optical signal OS2a can pass through the second reflector RF2 and the third reflector RF3. The third optical signal OS3a and the fourth optical signal OS4a can pass through the third reflector RF3.

[0049] The first optical signal OS1a, the third optical signal OS3a, and the fifth optical signal OS5a may be emitted from the first region OPT_R1a of the third reflector RF3. The second optical signal OS2a, the fourth optical signal OS4a, and the sixth optical signal OS6a may be emitted from the second region OPT_R2a of the third reflector RF3. The first region OPT_R1a and the second region OPT_R2a of the third reflector RF3 may be similar to the first region OPT_R1 and the second region OPT_R2 of the optical unit OPT according to FIG. 1b. The first region OPT_R1a and the second region OPT_R2a of the third reflector RF3 may be spaced apart from each other in the third direction D3.

[0050] In some embodiments, the display device may include an optical unit OPTa and may emit the first, third, and fifth optical signals OS1a, OS3a, OS5a from the first region OPT_R1a of the third reflector RF3. Also, the second, fourth, and sixth optical signals OS2a, OS4a, OS6a may be emitted from the second region OPT_R2a of the third reflector RF3. Thereby, pixels that emit light in the same wavelength region may be arranged adjacent to each other. Thereby, the process of forming pixels on the substrate 100 may be simplified.

[0051] The display device according to some embodiments includes the first to third reflectors RF1, RF2, RF3 including splitters, and the optical signal reflected from the first reflector RF1 may pass through the second reflector RF2 and the third reflector RF3 and proceed.

[0052] The display device according to some embodiments arranges outer pixels that do not emit optical signals on the outer contours of the first to third pixel arrays PA1, PA2, PA3, and the outer pixels are adjacent to each other, and the alignment between the first to third pixel arrays PA1, PA2, PA3 and the optical unit OPT may be facilitated.

[0053] In one embodiment, the display device includes first to third reflectors RF1, RF2, and RF3 that include dichroic mirrors, and the intensity of the optical signal reflected from the first reflector RF1 and transmitted through the second reflector RF2 or the third reflector RF3, and the optical signal reflected from the second reflector RF2 and transmitted through the third reflector RF3 may be relatively large.

[0054] FIG. 3a is a cross-sectional view of a display device according to some embodiments. FIG. 3b is an enlarged view of region A in FIG. 3a. The display device according to FIGS. 3a and 3b may be similar to the display device according to FIG. 2, except as described below.

[0055] Referring to FIGS. 3a and 3b, a path conversion layer 200 may be disposed over the first to third pixel arrays PA1, PA2, and PA3. The path conversion layer 200 may include a path conversion lens 201 and a support portion 202. In some embodiments, the path conversion lens 201 and the support portion 202 may include glass. The path conversion lens 201 and the support portion 202 may have different refractive indices from each other.

[0056] In some embodiments, the path conversion layer 200 may include a lens array. For example, the path conversion layer 200 may include a Fresnel lens array.

[0057] The first pixel PX1 may emit a first optical signal OS1b. The second pixel PX2 may emit a second optical signal OS2b. The third pixel PX3 may emit a third optical signal OS3b. The fourth pixel PX4 may emit a fourth optical signal OS4b. The fifth pixel PX5 may emit a fifth optical signal OS5b. The sixth pixel PX6 may emit a sixth optical signal OS6b.

[0058] The optical signals OS1b, OS2b, OS3b, OS4b, OS5b, and OS6b may have their paths changed while passing through the path conversion layer 200.

[0059] The angle between the traveling path of the first optical signal OS1b emitted from the first pixel PX1 and incident on the path conversion layer 200 and the upper surface of the substrate 100 can be larger than the angle between the traveling path of the first optical signal OS1b emitted from the path conversion layer 200 and the upper surface of the substrate 100. The angle between the traveling path of the second optical signal OS2b emitted from the second pixel PX2 and incident on the path conversion layer 200 and the upper surface of the substrate 100 can be larger than the angle between the traveling path of the second optical signal OS2b emitted from the path conversion layer 200 and the upper surface of the substrate 100. The angle between the traveling path of the third optical signal OS3b emitted from the third pixel PX3 and incident on the path conversion layer 200 and the upper surface of the substrate 100 can be larger than the angle between the traveling path of the third optical signal OS3b emitted from the path conversion layer 200 and the upper surface of the substrate 100. The angle between the traveling path of the fourth optical signal OS4b emitted from the fourth pixel PX4 and incident on the path conversion layer 200 and the upper surface of the substrate 100 can be larger than the angle between the traveling path of the fourth optical signal OS4b emitted from the path conversion layer 200 and the upper surface of the substrate 100. The angle between the traveling path of the fifth optical signal OS5b emitted from the fifth pixel PX5 and incident on the path conversion layer 200 and the upper surface of the substrate 100 can be larger than the angle between the traveling path of the fifth optical signal OS5b emitted from the path conversion layer 200 and the upper surface of the substrate 100. The angle between the traveling path of the sixth optical signal OS6b emitted from the sixth pixel PX4 and incident on the path conversion layer 200 and the upper surface of the substrate 100 can be larger than the angle between the traveling path of the sixth optical signal OS6b emitted from the path conversion layer 200 and the upper surface of the substrate 100.

[0060] The first reflector RF1b can reflect the first and second optical signals OS1b, OS2b emitted from the path conversion layer 200. The second reflector RF2b can reflect the third and fourth optical signals OS3b, OS4b emitted from the path conversion layer 200. The third reflector RF3b can reflect the fifth and sixth optical signals OS5b, OS6b emitted from the path conversion layer 200.

[0061] The first and second optical signals OS1b and OS2b reflected by the first reflector RF1b, the third and fourth optical signals OS3b and OS4b reflected by the second reflector RF2b, and the fifth and sixth optical signals OS5b and OS6b reflected by the third reflector RF3b may travel in the first direction D1.

[0062] A display device according to some embodiments includes a path conversion layer 200, which can reduce the angle between the optical signal emitted from the pixel and the upper surface of the substrate 100. Thereby, the angle at which the lower surfaces of the first to third reflectors RF1b, RF2b, and RF3b are inclined can be made smaller. Thereby, the height of the first to third reflectors RF1b, RF2b, and RF3b in the third direction D3 can be reduced, and the display device can be miniaturized.

[0063] FIG. 4a is a plan view of a display device according to some embodiments. FIG. 4b is a cross-sectional view taken along line II-II' of FIG. 4a. FIG. 4c is an enlarged view of region B in FIG. 4b. FIG. 4d is a view showing a combiner of a display device according to some embodiments. FIG. 4e is a view showing the operation of a display device according to some embodiments. FIG. 4f is a view showing the operation of a display device according to some embodiments. The display device according to FIGS. 4a, 4b, 4c, and 4d may be similar to the display device according to FIGS. 3a and 3b, except as described below.

[0064] Referring to FIGS. 4a, 4b, and 4c, a focus conversion structure 300 may be disposed on the path conversion layer 200. The focus conversion structure 300 may include a plurality of focus conversion layers arranged in the first direction D1 and the second direction D2. The focus conversion layers may include a first focus conversion layer 310, a second focus conversion layer 320, a third focus conversion layer 330, a fourth focus conversion layer 340, a fifth focus conversion layer 350, a sixth focus conversion layer 360, a seventh focus conversion layer 370, an eighth focus conversion layer 380, a ninth focus conversion layer 390, a tenth focus conversion layer 3100, an eleventh focus conversion layer 3110, and a twelfth focus conversion layer 3120.

[0065] The first focus conversion layer 310 may overlap with the first pixel PX1c in the third direction D3. The second focus conversion layer 320 may overlap with the second pixel PX2c in the third direction D3. The third focus conversion layer 330 may overlap with the third pixel PX3c in the third direction D3. The fourth focus conversion layer 340 may overlap with the fourth pixel PX4c in the third direction D3.

[0066] The seventh focus conversion layer 370 may be adjacent to the first focus conversion layer 310 in the direction opposite to the second direction D2. The eighth focus conversion layer 380 may be adjacent to the second focus conversion layer 320 in the direction opposite to the second direction D2. The ninth focus conversion layer 390 may be adjacent to the third focus conversion layer 330 in the direction opposite to the second direction D2. The tenth focus conversion layer 3100 may be adjacent to the fourth focus conversion layer 340 in the direction opposite to the second direction D2. The eleventh focus conversion layer 3110 may be adjacent to the fifth focus conversion layer 350 in the direction opposite to the second direction D2. The twelfth focus conversion layer 3120 may be adjacent to the sixth focus conversion layer 360 in the direction opposite to the second direction D2.

[0067] The first reflector RF1c may overlap with the first focus conversion layer 310 and the second focus conversion layer 320 in the third direction D3. The second reflector RF2c may overlap with the third focus conversion layer 330 and the fourth focus conversion layer 340 in the third direction D3. The third reflector RF3c may overlap with the fifth focus conversion layer 350 and the sixth focus conversion layer 360 in the third direction D3.

[0068] The first focus conversion layer 310 may include a first focus conversion lens 311 and a first support 312. The second focus conversion layer 320 may include a second focus conversion lens 321 and a second support 322. The third focus conversion layer 330 may include a third focus conversion lens 331 and a third support 332. The fourth focus conversion layer 340 may include a fourth focus conversion lens 341 and a fourth support 342.

[0069] The first focus conversion lens 311 and the third focus conversion lens 331 may have a first focal length. The second focus conversion lens 321 and the fourth focus conversion lens 341 may have a second focal length. The fifth focus conversion layer 350 may include a focus conversion lens having the first focal length. The sixth focus conversion layer 360 may include a focus conversion lens having the second focal length. The seventh, ninth, and eleventh focus conversion layers 370, 390, 3110 may include a focus conversion lens having a third focal length. The eighth, tenth, and twelfth focus conversion layers 380, 3100, 3120 may include a focus conversion lens having a fourth focal length. The first to fourth focal lengths may be different from each other.

[0070] The traveling directions of the optical signals incident on the first to fourth focus conversion lenses 311, 321, 331, 341 and the traveling directions of the optical signals transmitted through and emitted from the first to fourth focus conversion lenses 311, 321, 331, 341 may be the same.

[0071] A combiner 400 spaced apart from the first to third reflectors RF1c, RF2c, RF3c in the first direction D1 may be provided. The combiner 400 may include a reflection part MR and a splitter part SP. The reflection part MR may include a mirror. The splitter part SP may include a splitter.

[0072] The optical signals emitted from the first to third reflectors RF1c, RF2c, RF3c may be incident on the combiner 400. The combiner 400 may process the incident optical signals and emit a multi-focus optical signal MF.

[0073] The first focal optical signal F1 may be incident on the reflection part MR. In some embodiments, the first focal optical signal F1 may be one of the optical signals that have passed through the first focus conversion layer 310, the third focus conversion layer 330, and the fifth focus conversion layer 350. The second focal optical signal F2 may be incident on the splitter part SP. In some embodiments, the second focal optical signal F2 may be one of the optical signals that have passed through the second focus conversion layer 320, the fourth focus conversion layer 340, and the sixth focus conversion layer 360.

[0074] The first focal light signal F1 can be reflected from the reflection part MR and incident on the splitter part SP. The first focal light signal F1 and the second focal light signal F2 incident on the splitter part SP can pass through the splitter part SP and be emitted in the first direction D1. The first multi-focal light signal MF1 can be emitted from the splitter part SP. The multi-focal light signal MF can include the first focal light signal F1 and the second focal light signal F2 emitted from the splitter part SP.

[0075] Referring to FIG. 4e, the pixels overlapping the seventh focal conversion layer 370 can generate the first hue element OBJ11 of the first object OBJ1. The pixels overlapping the ninth focal conversion layer 390 can generate the second hue element OBJ12 of the first object OBJ1. The pixels overlapping the eleventh focal conversion layer 3110 can generate the third hue element OBJ13 of the first object OBJ1.

[0076] The pixels overlapping the first focal conversion layer 310 can generate the first hue element OBJ21 of the second object OBJ2. The pixels overlapping the third focal conversion layer 330 can generate the second hue element OBJ22 of the second object OBJ2. The pixels overlapping the fifth focal conversion layer 350 can generate the third hue element OBJ23 of the second object OBJ2.

[0077] The pixels overlapping the eighth focal conversion layer 380 can generate the first hue element OBJ31 of the third object OBJ3. The pixels overlapping the tenth focal conversion layer 3100 can generate the second hue element OBJ32 of the third object OBJ3. The pixels overlapping the twelfth focal conversion layer 3120 can generate the first hue element OBJ33 of the third object OBJ3.

[0078] A multi-focal display MFD including the first focal light signal F1, the second focal light signal F2, the third focal light signal F3, and the fourth focal light signal F4 can be provided. The first focal light signal F1 can include the second object OBJ2. The third focal light signal F3 can include the first object OBJ1. The fourth focal light signal F4 can include the second object OBJ2.

[0079] A display device according to some embodiments includes a focus conversion structure 300 that includes focus conversion layers having different focal lengths and can form optical signals having different focal planes.

[0080] A display device according to some embodiments includes a combiner 400 and can display optical signals having different focal planes on one display.

[0081] As described above, embodiments of the present invention have been described with reference to the accompanying drawings. Those of ordinary skill in the art to which the present invention pertains should understand that the present invention can be implemented in other specific forms without changing its technical idea and essential features. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive.

Claims

1. a first pixel that emits a first optical signal; a second pixel adjacent to the first pixel in the first direction and emitting a second optical signal; a third pixel that emits a third optical signal; a fourth pixel adjacent to the third pixel in the first direction and emitting a fourth optical signal; an optical unit that reflects the first to fourth optical signals; the second pixel and the third pixel are disposed between the first pixel and the fourth pixel, the first optical signal and the third optical signal are emitted from a first region of the optical portion; the second optical signal and the fourth optical signal are emitted from a second region of the optical portion; The first region and the second region are spaced apart from each other.

2. the first optical signal and the second optical signal include light in a first wavelength region; The display device of claim 1 , wherein the third optical signal and the fourth optical signal include light in a second wavelength region.

3. a fifth pixel that emits a fifth optical signal; and a sixth pixel that is adjacent to the fifth pixel in the first direction and emits a sixth optical signal; the fifth pixel is disposed between the fourth pixel and the sixth pixel; the optical unit reflects the fifth optical signal and the sixth optical signal; the fifth optical signal is emitted from the first region of the optical portion; The display device of claim 1 , wherein the sixth light signal is emitted from the second region of the optical portion.

4. the first optical signal and the second optical signal include light in a first wavelength region; the third optical signal and the fourth optical signal include light in a second wavelength region, The display device of claim 3 , wherein the fifth optical signal and the sixth optical signal include light in a third wavelength region.

5. The display device of claim 1 , wherein the optical unit emits the first to fourth optical signals in the first direction.

6. The display device of claim 5 , wherein the first pixel emits the first light signal in a second direction intersecting the first direction.

7. Further comprising a substrate; The display device of claim 1 , wherein the first, second, third and fourth pixels are disposed on a top surface of the substrate.

8. a first pixel that emits a first optical signal; a second pixel adjacent to the first pixel in the first direction and emitting a second optical signal; a third pixel that emits a third optical signal; a fourth pixel adjacent to the third pixel in the first direction and emitting a fourth optical signal; an optical unit that reflects the first to fourth optical signals; the second pixel and the third pixel are disposed between the first pixel and the fourth pixel, The optical portion comprises: a first reflector overlapping the first pixel in a second direction and spaced apart from the first pixel and the second pixel in the second direction; a second reflector overlapping the third pixel in the second direction and spaced apart from the third pixel and the fourth pixel in the second direction, The display device, wherein the second direction intersects with the first direction.

9. Further comprising a substrate; the first to fourth pixels are disposed on an upper surface of the substrate; 9. The display device of claim 8, wherein a lower surface of the first reflector is inclined relative to the upper surface of the substrate.

10. 10. The display device of claim 9, wherein a lower surface of the second reflector is parallel to the lower surface of the first reflector.

11. Further comprising a path conversion layer disposed between the first pixel and the first reflector; The display device of claim 8 , wherein the first optical signal incident on the path conversion layer and the first optical signal emitted from the path conversion layer travel in different directions.

12. 9. The display device of claim 8, wherein the second reflector comprises a splitter.

13. the first reflector reflects the first optical signal and the second optical signal; The display device of claim 8 , wherein the second reflector reflects the third light signal and the fourth light signal.

14. A substrate; a first pixel, a second pixel, a third pixel, a fourth pixel, a fifth pixel, and a sixth pixel disposed on the substrate; a first boundary pixel, a second boundary pixel, a third boundary pixel, a fourth boundary pixel, a fifth boundary pixel, and a sixth boundary pixel; the first pixel and the second pixel are disposed between the first outer pixel and the second outer pixel, the third pixel and the fourth pixel are disposed between the third outer pixel and the fourth outer pixel, the fifth pixel and the sixth pixel are disposed between the fifth outer pixel and the sixth outer pixel, the second boundary pixel and the third boundary pixel are adjacent to each other in a first direction, the fourth outer pixel and the fifth outer pixel are adjacent to each other in the first direction, each of the first and second pixels emitting an optical signal including light in a first wavelength region; each of the third and fourth pixels emits an optical signal including light in a second wavelength region; The display device, wherein each of the fifth and sixth pixels emits an optical signal including light in a third wavelength region.

15. Further comprising a first focus conversion layer overlapping the first pixel and a second focus conversion layer overlapping the second pixel, The first focal conversion layer includes a first lens, The second focal conversion layer includes a second lens, The display device of claim 14 , wherein the first lens and the second lens have different focal lengths.

16. Further including a third focal conversion layer overlapping the third pixel and a fourth focal conversion layer overlapping the fourth pixel; The third focal conversion layer includes a third lens, the fourth focal conversion layer includes a fourth lens; the first lens and the third lens have the same focal length; 16. The display device of claim 15, wherein the second lens and the fourth lens have the same focal length.

17. A first reflector overlapping the first focal conversion layer and the second focal conversion layer; The display device of claim 16, further comprising: a second reflector overlapping the third and fourth focus conversion layers.

18. Further comprising a path conversion layer disposed between the first pixel and the first focal conversion layer and between the third pixel and the third focal conversion layer; The display device of claim 16 , wherein the path conversion layer comprises a lens array.

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