Display device

Abstract

A display device (1) comprises a transparent light-emitting layer (2) and a display layer (3). The transparent light-emitting layer (2) has a first light-emitting pixel (L1) and a second light-emitting pixel (L2) that emit light of a first color and light of a second color, respectively. The display layer (3) has: a first display pixel (D1) disposed corresponding to the first light-emitting pixel (L1) and the second light-emitting pixel (L2) in order to emit light of a third color and; and a second display pixel (D2) adjacent to the first display pixel (D1) in order to emit light of the first color. The transparent light-emitting layer (2) further has a third light-emitting pixel (L3) and a fourth light-emitting pixel (L4) disposed corresponding to the second display pixel (D2) in order to emit light of the second color and light of the third color.

Description

[Technical field]

[0001] The present invention relates to a display device that achieves both a high frame rate and a high resolution. [Background technology]

[0002] A display device in which a first light-emitting layer and a second light-emitting layer are overlapped in a display panel using organic EL elements is known (Patent Document 1). In this display device, a pixel in which a light-emitting element of a first color is formed in the first light-emitting layer and light-emitting elements of a second color and a third color are formed in the second light-emitting layer, and a pixel in which a light-emitting element of a first color is formed in the second light-emitting layer and light-emitting elements of a second color and a third color are formed in the first light-emitting layer are alternately arranged on a glass substrate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2013-243048 Summary of the Invention [Problem to be solved by the invention]

[0004] The display device described in Patent Document 1 can display a full-color image using three or more colors with only the first light-emitting layer or only the second light-emitting layer. However, since the resolution of the light-emitting elements of the first to third colors in the first light-emitting layer is the same as the resolution of the light-emitting elements of the first to third colors in the second light-emitting layer, it is not possible to display images with different resolutions.

[0005] An object of one embodiment of the present invention is to provide a display device capable of displaying images with various resolutions. [Means for solving the problem]

[0006] In order to solve the above problem, a display device according to one embodiment of the present invention includes a transparent light-emitting layer provided on a viewing surface side and a display layer provided on an opposite side to the viewing surface, the transparent light-emitting layer having first and second light-emitting pixels adjacent to each other along a first direction parallel to the viewing surface to emit a first color and a second color that are different from each other, the display layer having a first display pixel arranged corresponding to the first light-emitting pixel and the second light-emitting pixel to emit a third color that is different from the first color and the second color, and a second display pixel adjacent to the first display pixel along the first direction to emit the first color, and the transparent light-emitting layer further has a third light-emitting pixel and a fourth light-emitting pixel arranged corresponding to the second display pixel to emit the second color and the third color, respectively. Effect of the Invention

[0007] According to one aspect of the present invention, video can be displayed at a variety of resolutions. [Brief description of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view of a display device according to a first embodiment. [Diagram 2] FIG. 2 is a plan view of the display device as viewed from the viewing surface side. [Diagram 3] FIG. 2 is a perspective view of a main part of the display device. [Figure 4] FIG. 2 is a plan view showing a pixel structure of the display device. [Diagram 5] FIG. 4 is a plan view showing another pixel structure of the display device. [Figure 6] FIG. 4 is a plan view showing still another pixel structure of the display device. [Figure 7] FIG. 2 is a system block diagram of the display device. [Figure 8] 4 is a timing chart showing an operation of the display device. [Figure 9] FIG. 11 is a system block diagram of a display device according to a second embodiment. [Figure 10] 4 is a timing chart showing an operation of the display device. [Figure 11] FIG. 11 is a system block diagram of a display device according to a third embodiment. [Figure 12] 4 is a timing chart showing an operation of the display device. [Figure 13] FIG. 11 is a cross-sectional view of a display device according to a fourth embodiment. [Figure 14] FIG. 11 is a cross-sectional view of a display device according to a fifth embodiment. [Figure 15] FIG. 2 is a perspective view of a main part of the display device. [Figure 16] FIG. 11 is a perspective view of a main part of a modified example of the display device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (Embodiment 1) Fig. 1 is a cross-sectional view of a display device 1 according to embodiment 1. Fig. 2 is a plan view of the display device 1 as viewed from the viewing surface side. Fig. 3 is a perspective view of a main part of the display device 1.

[0010] The display device 1 includes a transparent light-emitting layer 2 provided on the viewing surface 17 side, and a display layer 3 provided on the opposite side to the viewing surface 17. The display layer 3 is formed on a TFT substrate 18. An insulating layer 19 is formed on the display layer 3. The transparent light-emitting layer 2 is formed on the insulating layer 19.

[0011] The transparent light-emitting layer 2 has a first light-emitting pixel L1 and a second light-emitting pixel L2 adjacent to each other along a first direction (X direction) parallel to the viewing surface 17 to emit a first color (green) and a second color (red) that are different from each other, respectively.

[0012] The display layer 3 has a first display pixel D1 arranged corresponding to the first light-emitting pixel L1 and the second light-emitting pixel L2 to emit a third color (blue) different from the first color (green) and the second color (red), and a second display pixel D2 adjacent to the first display pixel D1 along the X direction to emit the first color (green).

[0013] The transparent light-emitting layer 2 further includes a third light-emitting pixel L3 and a fourth light-emitting pixel L4 that are arranged corresponding to the second display pixel D2 to emit light of a second color (red) and a third color (blue), respectively.

[0014] The first light emitting pixel L1 and the fourth light emitting pixel L4 are adjacent to each other in the X direction.

[0015] The display layer 3 further includes a third display pixel D3 adjacent to the second display pixel D2 along the X direction for emitting light of a second color (red).

[0016] The transparent light-emitting layer 2 further includes a fifth light-emitting pixel L5 and a sixth light-emitting pixel L6 that are arranged corresponding to the third display pixel D3 to emit light of a first color (green) and a third color (blue), respectively.

[0017] 2 and 3, first display pixels D1 are arranged adjacent to each other along the Y direction, second display pixels D2 are arranged adjacent to each other along the Y direction, and third display pixels D3 are arranged adjacent to each other along the Y direction.

[0018] The first light emitting pixels L1 are arranged adjacent to each other along the Y direction. The second light emitting pixels L2 are arranged adjacent to each other along the Y direction. The third light emitting pixels L3 are arranged adjacent to each other along the Y direction. The fourth light emitting pixels L4 are arranged adjacent to each other along the Y direction. The fifth light emitting pixels L5 are arranged adjacent to each other along the Y direction. The sixth light emitting pixels L6 are arranged adjacent to each other along the Y direction.

[0019] Each of the first to sixth light-emitting pixels L1, L2, L3, L4, L5, and L6 and the first to third display pixels D1, D2, and D3 includes a pair of electrodes, a quantum dot layer (electroluminescent light-emitting layer) formed between the pair of electrodes, a hole transport layer formed between one of the pair of electrodes and the quantum dot layer, and an electron transport layer formed between the other of the pair of electrodes and the quantum dot layer.

[0020] The transparent light-emitting layer 2 is transparent and includes first to sixth light-emitting pixels L1 to L6 each including a self-emitting quantum dot layer. The display layer 3 may be transparent or opaque. The display layer 3 may also include self-emitting elements, or may be a panel including a liquid crystal display element and a backlight.

[0021] The transparent light-emitting layer 2 is provided on the viewing surface 17 side of the display device 1, and the display layer 3 is provided on the opposite side to the viewing surface 17. The transparent light-emitting layer 2 and the display layer 3 may be composed of organic or inorganic LEDs (Light Emitting Diodes). The transparent light-emitting layer 2 and the display layer 3 may contain QDs (quantum dots).

[0022] Pixels of the display layer 3 are provided corresponding to the plurality of pixels of the transparent light-emitting layer 2. At this time, the color of the pixels of the transparent light-emitting layer 2 and the color of the pixels of the display layer 3 are overlapped, as shown in Figs.

[0023] Fig. 4 is a plan view showing the pixel structure of the display device 1. In this pixel structure, a first light-emitting pixel L1 and a second light-emitting pixel L2 arranged on the transparent light-emitting layer 2, and a first display pixel D1 arranged on the display layer 3 constitute one RGB pixel. A third light-emitting pixel L3, a fourth light-emitting pixel L4, and a second display pixel D2 constitute one pixel, and a fifth light-emitting pixel L5, a sixth light-emitting pixel L6, and a third display pixel D3 constitute one pixel. In the example shown in Fig. 4, six pixels in two rows and three columns are configured.

[0024] Fig. 5 is a plan view showing another pixel structure of the display device 1. In this other pixel structure, a first light-emitting pixel L1, a second light-emitting pixel L2, and a fourth light-emitting pixel L4 arranged on the transparent light-emitting layer 2 constitute one RGB pixel. A third light-emitting pixel L3, a fifth light-emitting pixel L5, and a sixth light-emitting pixel L6 arranged on the transparent light-emitting layer 2 constitute one pixel. In the example shown in Fig. 5, four pixels in two rows and two columns are configured.

[0025] Fig. 6 is a plan view showing yet another pixel structure of the display device 1. In this yet another pixel structure, a first display pixel D1, a second display pixel D2, and a third display pixel D3 arranged on the display layer 3 constitute one RGB pixel. In the example shown in Fig. 6, two pixels in two rows and one column are constituted.

[0026] In this way, the color combination shown in FIG. 2 can be displayed at three different resolutions as shown in FIG. 4 to FIG. 6. Consider a pixel consisting of three sub-pixels of R / G / B with the color combination in FIG. 2. Looking at only the transparent light-emitting layer 2, which is the upper light-emitting layer, it can be considered as a total of four pixels, two pixels horizontally and two pixels vertically, as shown in FIG. 5. Looking at only the display layer 3, which is the lower display layer, it can be considered as a total of two pixels, one pixel horizontally and two pixels vertically, as shown in FIG. 6. Furthermore, if the first and second light-emitting pixels L1 and L2 of the transparent light-emitting layer 2 and the first display pixel D1 of the display layer 3 at the upper left are considered as one pixel, and the third and fourth light-emitting pixels L3 and L4 of the transparent light-emitting layer 2 to the right of them and the second display pixel D2 of the display layer 3 are considered as one pixel, it is possible to display a total of six pixels, three pixels horizontally and two pixels vertically, as shown in FIG. 4.

[0027] Of the pixel structures shown in FIGS. 4 to 6, the pixel structure shown in FIG. 4 is the finest.

[0028] Fig. 7 is a system block diagram of the display device 1. Fig. 8 is a timing chart showing the operation of the display device 1.

[0029] It is advisable to provide a counter 20 and selectors 21, 22, and 23 so that the input video data is decomposed into three color components, for example, R (red component), G (green component), and B (blue component), and when the pixels arranged on the transparent light-emitting layer 2 display R and G, the pixels arranged on the display layer 3 display B, when the pixels of the transparent light-emitting layer 2 display B and R, the pixels of the display layer 3 display G, and when the pixels of the transparent light-emitting layer 2 display G and B, the pixels of the display layer 3 display R.

[0030] Specifically, if the values ​​of three consecutive pixel data of the input video data are (R0, G0, B0), (R1, G1, B1), and (R2, G2, B2), the transparent light-emitting layer 2 can be controlled to display (R0, G0), (B1, R1), and (G2, B2), and the display layer 3 can be controlled to display (B0), (G1), and (R2).

[0031] Furthermore, even if the transparent luminescent layer 2 and the display layer 3 display the same color, the light intensity and characteristics may be different, and the color will change if the transparent luminescent layer 2 and the display layer 3 are displayed overlapping each other. Therefore, it is better to provide different correction tables for the transparent luminescent layer 2 and the display layer 3 and perform correction so that they appear to be the same color.

[0032] As shown in FIG. 7, the display device 1 further includes selectors 21 and 22 each having an R terminal for receiving pixel data R0 of the input video data via a correction table 24, a B terminal for receiving pixel data B0 of the input video data via a correction table 25, and a G terminal for receiving pixel data G0 of the input video data via a correction table 26, a selector 23 having an R terminal for receiving pixel data R1 of the input video data via a correction table 29, a B terminal for receiving pixel data B1 of the input video data via a correction table 27, and a G terminal for receiving pixel data G1 of the input video data via a correction table 28, a counter 20 for providing a count value of the input video data to the selectors 21, 22, and 23, a light emitting drive circuit 13 for driving first to sixth light emitting pixels L1 to L6 arranged on the transparent light emitting layer 2 based on the output of the selector 21 and the output of the selector 22, and a display drive circuit 14 for driving first to third display pixels D1 to D3 arranged on the display layer 3 based on the output of the selector 23.

[0033] In this manner, for example, by lighting both the first light-emitting pixel L1 and the second light-emitting pixel L2 of the transparent light-emitting layer 2 and the first display pixel D1 of the display layer 3, the brightness is improved compared to lighting a single layer of pixels.

[0034] One pixel can be configured with an area of ​​two sub-pixels (for example, the area of ​​the first light-emitting pixel L1 and the second light-emitting pixel L2) when viewed from the front of the display device 1. Therefore, input image data can be displayed with a resolution 1.5 times that of the transparent light-emitting layer 2.

[0035] Since the lower display layer 3 has a smaller number of pixels, the amount of data transfer is smaller and the frame time may be shortened. This will be described in detail in the second embodiment and onwards. For this reason, moving images can be quickly rewritten as coarse images using the pixels of the lower display layer 3. Still images are then slowly rewritten as fine images using the pixels of the upper transparent light-emitting layer 2.

[0036] (Embodiment 2) Fig. 9 is a system block diagram of a display device 1A according to embodiment 2. Fig. 10 is a timing chart showing the operation of the display device 1A. The same reference characters are used to refer to the components described above, and detailed description thereof will not be repeated.

[0037] In the first embodiment, as shown in Fig. 8, the frame time, which is the period of the vertical synchronization signal, is the same for the pixels of the display layer 3 and the pixels of the transparent light-emitting layer 2. However, since the number of pixels of the display layer 3 is smaller than that of the transparent light-emitting layer 2, it is possible to shorten the frame time if they have the same band. Therefore, as the second embodiment, an example in which the frame rates of the transparent light-emitting layer 2 and the display layer 3 are changed is given, and Fig. 9 shows a system block diagram and Fig. 10 shows a timing chart.

[0038] The frame time for driving the first display pixel D1 arranged in the display layer 3 (display frame time) is shorter than the frame time for driving the first light-emitting pixel L1 arranged in the transparent light-emitting layer 2 (light-emitting frame time).

[0039] The display drive circuit 14 drives the first to third display pixels D1 to D3 arranged on the display layer 3 based on input video data. The light emission drive circuit 13 drives the first to sixth light emitting pixels L1 to L6 arranged on the transparent light emitting layer 2 based on the input video data. The display device 1A further includes a frame memory 15 arranged upstream of the light emission drive circuit 13 to extend the frame time (light emission frame time) of the input video data for the first to sixth light emitting pixels L1 to L6.

[0040] 9 and 10 show the case where input video data is input in half the frame time of FIG. 8. For example, a 120 Hz video signal is input to a panel with an original specification of 60 Hz input. Then, data is transmitted to the display layer 3 in the frame time of the input video data and displayed. Since the transparent light-emitting layer 2 cannot transmit data at that frame rate, the input video data is temporarily stored in the frame memory 15 as shown in FIG. 9, and the frame time is extended twice and transmitted. In that case, since two frames of input video data need to be transmitted in one frame time, one frame may be thinned out, or the average of two frames may be calculated. Specifically, if the input video of three consecutive pixels in the nth frame is (R0(n), G0(n), B0(n)), (R1(n), G1(n), B1(n)), (R2(n), G2(n), B2(n)), the displayed values ​​are as follows.

[0041] (2n) frame, Display layer 3: (B0(2n)), (G1(2n)), (R2(2n)), Transparent light emitting layer 2: ((R0(2n)+R0(2n+1)) / 2, (G0(2n)+G0(2n+1)) / 2), ((B1(2n)+B1(2n+1) ) / 2, (R1(2n)+R1(2n+1)) / 2), ((G2(2n)+G2(2n+1)) / 2, (B2(2n)+B2(2n+1)) / 2), (2n+1)th frame, Display layer 3: (B0(2n+1)), (G1(2n+1)), (R2(2n+1)), Transparent light-emitting layer: Same as the (2n) frame, In this way, the display frame time for driving the first display pixel D1 is shorter than the light emission frame time for driving the first light emission pixel L1.

[0042] The display device 1A further includes a display drive circuit 14 that drives the first display pixel D1 based on input video data, a light emission drive circuit 13 that drives the first light emission pixel L1 based on the input video data, and a frame memory 15 arranged upstream of the light emission drive circuit 13 to extend the light emission frame time of the input video data.

[0043] Conventionally, when two panels are overlapped, display is performed according to the longer frame time, but according to this embodiment, display can be performed according to the shorter frame time. Images with short frame times have low resolution, but this is not a problem for moving images because fine details cannot be distinguished, and high resolution can be obtained for still images. In this way, according to the second embodiment, it is possible to achieve both high definition and a high frame rate.

[0044] (Embodiment 3) Fig. 11 is a system block diagram of a display device 1B according to embodiment 3. Fig. 12 is a timing chart showing the operation of the display device 1B. The same reference characters are used to refer to the components described above, and detailed description thereof will not be repeated.

[0045] The display device 1B further includes a display drive circuit 14 that drives the first to third display pixels D1 to D3 of the display layer 3 based on input video data, a light-emitting drive circuit 13 that drives the first to sixth light-emitting pixels L1 to L6 of the transparent light-emitting layer 2 based on the input video data, and a frame rate conversion circuit 16 and a frame memory 15 that are arranged upstream of the display drive circuit 14 in order to shorten the frame time (display frame time) of the input video data.

[0046] In the second embodiment, the frame time of the input video data is halved.

[0047] As a third embodiment, an example will be shown in which video data with a half frame time is generated by the frame rate conversion circuit 16 and displayed on the display layer 3.

[0048] 11 and 12, input video data having the same frame time as that of Fig. 8 is input, and video data having half the frame time is generated by frame rate conversion circuit 16. Frame rate conversion circuit 16 may output the same video data twice, or may predict motion and output video data that is temporally interpolated.

[0049] Data is transmitted to and displayed on the transparent light-emitting layer 2 in the frame time of the input video data. The display layer 3 transmits video data generated by the frame rate conversion circuit 16 and having half the frame time.

[0050] As such, the display device 1B further includes a display drive circuit 14 that drives the first display pixel D1 based on the input video data, a light-emitting drive circuit 13 that drives the first light-emitting pixel L1 based on the input video data, and a frame rate conversion circuit 16 arranged upstream of the display drive circuit 14 to shorten the display frame time of the input video data.

[0051] Since the frame rate conversion circuit 16 only needs to convert the video data of the display layer 3, the number of pixels corresponding to the video data to be converted can be reduced compared to the case where the video data of the transparent light-emitting layer 2 is also converted. In the example of this embodiment, since it is only necessary to convert 1 / 3 of the amount of data, the capacity of the frame memory 15 and the calculation processing can be reduced to 1 / 3 compared to the case where the frame rate of all the input video data is converted. In this way, compared to a monitor having a conventional frame rate conversion circuit 16, it is possible to achieve both high definition and a high frame rate while reducing resources such as memory and circuits.

[0052] (Embodiment 4) 13 is a cross-sectional view of a display device 1C according to embodiment 4. The same reference characters are used to refer to the components described above, and detailed description thereof will not be repeated.

[0053] The display device 1C includes a transparent light-emitting layer 2 provided on the viewing surface 17 side, and a display layer 3C provided on the opposite side to the viewing surface 17. The display layer 3C includes a liquid crystal panel 30 and a backlight 31 provided on the opposite side to the viewing surface 17 of the liquid crystal panel 30.

[0054] The liquid crystal panel 30 includes a pair of polarizing plates 31 P and a polarizing plate 31 for transmitting blue light corresponding to the first and second light-emitting pixels L1 and L2. P and a polarizing plate 31B formed between the third and fourth light emitting pixels L3 and L4 to transmit green light. P A color filter 33G is formed between the fifth and sixth light emitting pixels L5 and L6, and a polarizing plate 31 is formed between the fifth and sixth light emitting pixels L5 and L6 to transmit red light. P The color filter 33R is formed between the color filters 33R, 33G, and 33B and the polarizing plate 31. P a pair of glass substrates 34 disposed between the pair of glass substrates 34, a pair of electrodes 35B formed on the pair of glass substrates 34 corresponding to color filter 33B, a pair of electrodes 35G formed on the pair of glass substrates 34 corresponding to color filter 33G, a pair of electrodes 35R formed on the pair of glass substrates 34 corresponding to color filter 33R, and a liquid crystal layer 36 formed between the pair of glass substrates 34.

[0055] The backlight 31 includes a backlight substrate 37 and a light source 38 disposed on the backlight substrate 37 .

[0056] The color filter 33B, the pair of electrodes 35B, the liquid crystal layer 36, and the backlight 31 constitute a first display pixel D1C. The color filter 33G, the pair of electrodes 35G, the liquid crystal layer 36, and the backlight 31 constitute a second display pixel D2C. The color filter 33R, the pair of electrodes 35R, the liquid crystal layer 36, and the backlight 31 constitute a third display pixel D3C.

[0057] The structure of the display device 1C viewed from the viewing surface 17 side is equivalent to the structure shown in Fig. 2 of the first embodiment. The structure of the display device 1C viewed obliquely is equivalent to the structure shown in Fig. 3.

[0058] The backlight 31 may be composed of a light-emitting section that emits blue light and ultraviolet light, and a sheet that includes phosphors and quantum dots (QDs).

[0059] Since liquid crystal display elements have a slower response speed than self-luminous display elements, it is possible to achieve a significant effect by making the frame time shorter than the frame time of the first to sixth light-emitting pixels L1 to L6 of the transparent light-emitting element 2, thereby increasing the frame rate.

[0060] (Embodiment 5) Fig. 14 is a cross-sectional view of a display device 1D according to embodiment 5. Fig. 15 is a perspective view of a main part of the display device 1D. The same reference characters are used to refer to the same components as above, and detailed description thereof will not be repeated.

[0061] The display device 1D includes a transparent light-emitting layer 2 provided on the viewing surface 17 side, and a display layer 3D provided on the opposite side to the viewing surface 17. The display layer 3D includes a first display pixel D1D arranged corresponding to the first light-emitting pixel L1 and the second light-emitting pixel L2 to emit a third color (blue) different from the first color (green) and the second color (red) by photoluminescence (PL), a second display pixel D2D adjacent to the first display pixel D1D along the X direction to emit the first color (green) by PL, and a third display pixel D3D adjacent to the second display pixel D2D along the X direction to emit the second color (red) by PL.

[0062] The second display pixel D2D is disposed corresponding to the third and fourth light emitting pixels L3 and L4, and the third display pixel D3D is disposed corresponding to the fifth and sixth light emitting pixels L5 and L6.

[0063] The display layer 3D includes an ultraviolet light source 39 for supplying ultraviolet light to the first display pixel D1D, an ultraviolet light source 39 for supplying ultraviolet light to the second display pixel D2D, and a 3The display pixel D3D further includes an ultraviolet light source 39 that supplies ultraviolet light to the display pixel D3D. Electrodes 40 are provided on both sides of each ultraviolet light source 39. The first to third display pixels D1D to D3D emit light based on the ultraviolet light supplied from each ultraviolet light source 39.

[0064] An ultraviolet ray cut filter 41 for absorbing ultraviolet rays supplied from an ultraviolet ray light source 39 is provided on the transparent light emitting layer 2 on the opposite side to the display layer 3D.

[0065] The display device 1D according to embodiment 5 has a wide color reproducibility because quantum dots are used in both the transparent light-emitting layer 2 and the display layer 3D. In addition, the first to sixth light-emitting pixels L1 to L6 using quantum dots are provided in the transparent light-emitting layer 2, so that high transmittance can be obtained.

[0066] The first to third display pixels D1D to D3D of the display layer 3D are excited by ultraviolet light to emit light, so that the luminance can be increased and degradation is reduced.

[0067] 16 is a perspective view of a main part of a display device 1E according to a modified example. The same reference characters are used to refer to the same components as described above, and detailed description thereof will not be repeated.

[0068] Display device 1 E The display layer 3E includes a transparent light-emitting layer 2 and a display layer 3E. The display layer 3E includes a first display pixel D1E arranged corresponding to two first light-emitting pixels L1 and two second light-emitting pixels L2 to emit light of a third color (blue) by PL, a second display pixel D2E arranged corresponding to two third light-emitting pixels L3 and two fourth light-emitting pixels L4 to emit light of the first color (green) by PL, and a third display pixel D3E arranged corresponding to two fifth light-emitting pixels L5 and two sixth light-emitting pixels L6 to emit light of the second color (red) by PL.

[0069] In this manner, the first to third display pixels D1E to D3E may be connected across four light emitting pixels. This makes the area of ​​the first to third display pixels D1E to D3E for PL emission larger than the first to third display pixels D1D to D3D, making it easier to apply QD during manufacturing.

[0070] The display device 1E according to the fifth embodiment can expand the color gamut because quantum dots are used in both the transparent light-emitting layer 2 and the display layer 3E. In addition, during manufacturing, it is possible to share the QD material in an area corresponding to four light-emitting pixels arranged in two rows and two columns.

[0071] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. The technical scope of the present invention also includes embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Furthermore, new technical features can be formed by combining the technical means disclosed in the respective embodiments. [Explanation of symbols]

[0072] 1 Display device 2 Transparent light-emitting layer 3 Display layer L1 First light-emitting pixel L2 Second light-emitting pixel L3 Third pixel L4 4th pixel L5 Fifth pixel L6 6th pixel D1 First display pixel D2 Second display pixel D3 Third display pixel D1D First display pixel D2D Second display pixel D3D 3rd display pixel D1E 1st display pixel D2E Second display pixel D3E 3rd display pixel 13 Light Emitting Driver Circuit 14 Display driver circuit 15 Frame Memory 16 Frame rate conversion circuit 30 Liquid crystal panel 31 Backlight 39 Ultraviolet light source

Claims

1. A transparent light-emitting layer provided on the viewing surface side; An indication layer provided on the opposite side to the viewing surface, the transparent light-emitting layer has a first light-emitting pixel and a second light-emitting pixel adjacent to each other along a first direction parallel to the viewing surface to emit a first color and a second color different from each other, the display layer includes a first display pixel arranged corresponding to the first light-emitting pixel and the second light-emitting pixel for emitting a third color different from the first color and the second color, and a second display pixel adjacent to the first display pixel along the first direction for emitting the first color, the transparent light-emitting layer further includes a third light-emitting pixel and a fourth light-emitting pixel arranged corresponding to the second display pixel to emit the second color and the third color, respectively; The first light emitting pixel and the fourth light emitting pixel are adjacent to each other along the first direction.

2. A transparent light-emitting layer provided on the viewing surface side; An indication layer provided on the opposite side to the viewing surface, the transparent light-emitting layer has a first light-emitting pixel and a second light-emitting pixel adjacent to each other along a first direction parallel to the viewing surface to emit a first color and a second color different from each other, the display layer includes a first display pixel arranged corresponding to the first light-emitting pixel and the second light-emitting pixel for emitting a third color different from the first color and the second color, and a second display pixel adjacent to the first display pixel along the first direction for emitting the first color, the transparent light-emitting layer further includes a third light-emitting pixel and a fourth light-emitting pixel arranged corresponding to the second display pixel to emit the second color and the third color, respectively; the display layer further comprising a third display pixel adjacent to the second display pixel along the first direction for emitting the second color; the transparent light emitting layer further comprises a fifth light emitting pixel and a sixth light emitting pixel arranged corresponding to the third display pixel for emitting the first color and the third color, respectively.

3. the first to third display pixels are arranged adjacent to each other along a second direction intersecting the first direction, The display device according to claim 2 , wherein the first to sixth light-emitting pixels are arranged adjacent to each other along the second direction.

4. 4. The display device according to claim 1, wherein the first light-emitting pixel includes a pair of electrodes, a quantum dot layer formed between the pair of electrodes, a hole transport layer formed between one of the pair of electrodes and the quantum dot layer, and an electron transport layer formed between the other of the pair of electrodes and the quantum dot layer.

5. 4. The display device of claim 1 or 3, wherein the first light-emitting pixel comprises an organic or inorganic electroluminescent light-emitting layer.

6. 6. A display device as claimed in claim 1 or 5, wherein the first display pixel comprises an organic or inorganic electroluminescent light-emitting layer.

7. The display device according to claim 1 , wherein the first display pixel includes a liquid crystal panel and a backlight.

8. 6. The display device according to claim 1, wherein the first display pixel emits light by photoluminescence and includes an ultraviolet light source that supplies ultraviolet light to the first display pixel.

Images