Display system

Abstract

To provide a display system capable of imaging a display image on a display without coloring.SOLUTION: A display system 200 includes a display device 100 having a display panel P and an imaging device 300 for imaging an image including at least the display panel P in an imaging range IR. One frame period for displaying the image for one frame on the display panel P includes a plurality of sub-field periods for displaying different colors respectively. The display device 100 is configured so as to change a frame rate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a display system. [Background technology]

[0002] BACKGROUND ART Conventionally, a technique has been disclosed in which a transparent display is used as a background plate for photographing people (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-048433 Summary of the Invention [Problem to be solved by the invention]

[0004] A known transparent display is a transmissive liquid crystal display device that displays images by emitting light from different colored light emitters in a time-division manner. When photographing such a transparent display that displays images using the so-called Field Sequential Color (FSC) method, depending on the shutter speed of the camera, coloring may occur in the image captured by the camera.

[0005] The present disclosure has been made in view of the above-mentioned problems, and aims to provide a display system capable of capturing an image displayed on a display without coloring. [Means for solving the problem]

[0006] A display system according to one embodiment of the present disclosure comprises a display device having a display panel and an imaging device that captures an image that includes at least the display panel within an imaging range, wherein one frame period during which one frame of image is displayed on the display panel includes multiple subfield periods in which different colors are displayed, and the display device is configured to be able to change the frame rate. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a display system according to the first embodiment. [Figure 2] FIG. 2 is a schematic circuit diagram showing the main configuration of the display device. [Figure 3] FIG. 3 is a schematic cross-sectional view of the display panel. [Figure 4] FIG. 4 is a timing chart showing an example of one frame period. [Figure 5] FIG. 5 is a diagram showing a first example of image capture timing in the image capture device and display timing in the display device. [Figure 6] FIG. 6 is a diagram showing a second example of the image capturing timing in the image capturing device and the display timing in the display device. [Figure 7] FIG. 7 is a first conceptual diagram showing a first specific example of frame rate change in a display device. [Figure 8] FIG. 8 is a second conceptual diagram showing a first specific example of frame rate change in a display device. [Figure 9A] FIG. 9A is a first conceptual diagram showing a second specific example of frame rate change in a display device. [Figure 9B] FIG. 9B is a second conceptual diagram showing a second specific example of frame rate change in the display device. [Figure 10] FIG. 10 is a third conceptual diagram showing a second specific example of frame rate change in a display device. [Figure 11] FIG. 11 is a diagram showing a third example of the imaging timing in the imaging device and the display timing in the display device. [Figure 12] FIG. 12 is a diagram showing a fourth example of the imaging timing in the imaging device and the display timing in the display device. [Figure 13] FIG. 13 is a diagram showing a schematic configuration of a display system according to the second embodiment. [Figure 14]FIG. 14 is a conceptual diagram showing a third specific example of frame rate change in a display device. DETAILED DESCRIPTION OF THE INVENTION

[0008] Modes (embodiments) for carrying out the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the contents described in the following embodiments. Furthermore, the components described below include those that can be easily imagined by a person skilled in the art and those that are substantially identical. Furthermore, the components described below can be combined as appropriate. Furthermore, the disclosure is merely an example, and appropriate modifications that a person skilled in the art can easily conceive while maintaining the gist of the disclosure are naturally included within the scope of the present disclosure. Furthermore, for clarity of explanation, the drawings may schematically depict the width, thickness, shape, etc. of each part compared to the actual embodiment. However, these are merely examples and are not intended to limit the interpretation of the present disclosure. Furthermore, in this specification and each figure, elements similar to those described above with reference to the previous figures may be designated by the same reference numerals, and detailed descriptions may be omitted as appropriate.

[0009] (Embodiment 1) 1 is a diagram showing a schematic configuration of a display system according to Embodiment 1. As shown in FIG.

[0010] In the present disclosure, the display device 100 is a transmissive liquid crystal display device that performs display output using a so-called field sequential color (FSC) method, which controls pixels so that multiple colors of light are transmitted from the same pixel at different times.

[0011] In the present disclosure, imaging device 300 is a camera that captures an image that includes at least display panel P of display device 100 within an imaging range IR. Imaging device 300 may be a still camera that captures so-called still images, or a video camera that captures moving images. Imaging device 300 may also be a so-called film camera that captures images by exposing a film coated with a photosensitive agent, or a digital camera that acquires images using an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor).

[0012] 2 is a schematic circuit diagram showing the main components of the display device 100. The display device 100 includes a display panel module DPM and an image processing circuit 70. The display panel module DPM includes a display panel P and a light source device L.

[0013] The display panel P includes a display area 7, a signal output circuit 8, a scanning circuit 9, a VCOM drive circuit 10, a timing controller 13, and a power supply circuit 14. Hereinafter, one side of the display panel P facing the display area 7 will be referred to as the display surface, and the other side will be referred to as the rear surface. Furthermore, when referring to a side of the display device 100, it refers to a position that is located in a direction that intersects (e.g., perpendicular to) the opposing direction of the display surface and the rear surface with the display device 100 as the reference.

[0014] In the display area 7, a plurality of pixels Pix are arranged in a matrix in the X direction (first direction) and the Y direction (second direction). The Y direction (second direction) is a direction that intersects with the X direction (first direction). More specifically, in the example shown in FIG. 2, the Y direction (second direction) is a direction that is perpendicular to the X direction (first direction).

[0015] The pixel Pix includes a switching element 1 and two electrodes. Fig. 3 is a schematic cross-sectional view of a display panel. In Figs. 2 and 3, a pixel electrode 2 and a common electrode 6 are shown as the two electrodes.

[0016] The display panel P has two opposing substrates and a liquid crystal 3 sealed between the two substrates. Hereinafter, one of the two substrates will be referred to as a first substrate 30, and the other as a second substrate 20.

[0017] The first substrate 30 includes a light-transmitting glass substrate 35, a pixel electrode 2 laminated on the second substrate 20 side of the glass substrate 35, and an alignment film 55 laminated on the second substrate 20 side so as to cover the pixel electrode 2. The pixel electrode 2 is provided individually for each pixel Pix. The second substrate 20 includes a light-transmitting glass substrate 21, a common electrode 6 laminated on the first substrate 30 side of the glass substrate 21, and an alignment film 56 laminated on the first substrate 30 side so as to cover the common electrode 6. The common electrode 6 has a plate-like or film-like shape that is shared by multiple pixels Pix.

[0018] The liquid crystal 3 in the first embodiment is a polymer dispersed liquid crystal (PDLC). In other words, in this embodiment, the display panel P is a liquid crystal panel in which a polymer dispersed liquid crystal is sealed. Specifically, the liquid crystal 3 includes a bulk 51 and fine particles 52. The orientation of the fine particles 52 changes within the bulk 51 depending on the potential difference between the pixel electrode 2 and the common electrode 6. The potential of the pixel electrode 2 is individually controlled for each pixel Pix, thereby controlling the scattering state of the liquid crystal 3 for each pixel Pix.

[0019] Figure 3 shows an example in which the pixel electrode 2 and the common electrode 6 are arranged opposite each other with the liquid crystal 3 in between, but the display panel P may also be configured in such a way that the pixel electrode 2 and the common electrode 6 are provided on a single substrate, and the orientation changes due to the electric field generated by the pixel electrode 2 and the common electrode 6, thereby controlling the scattering state of the liquid crystal 3.

[0020] The display device 100 according to the present disclosure is a transparent display device configured to allow an image transmitted through the display panel P to be visible by controlling the potentials of the pixel electrodes 2 and the common electrode 6. Next, a mechanism for controlling the potentials of the pixel electrodes 2 and the common electrode 6 will be described.

[0021] The switching element 1 is a switching element that uses a semiconductor, such as a thin film transistor (TFT). One of the source or drain of the switching element 1 is connected to one of two electrodes (pixel electrode 2). The other of the source or drain of the switching element 1 is connected to a signal line SDL(m) (m is an integer from 1 to M, M is the total number of signal lines). The gate of the switching element 1 is connected to a scanning line SCL(n) (n is an integer from 1 to N, N is the total number of scanning lines). The scanning line SCL(n) applies a potential to open and close between the source and drain of the switching element 1 under the control of a scanning circuit 9. The scanning circuit 9 controls the potential.

[0022] In the example shown in FIG. 2, multiple signal lines SDL(n) are arranged along one of the arrangement directions of the pixels Pix (row direction). Signal line SDL(m) extends along the other of the arrangement directions of the pixels Pix (column direction). The signal line SDL(m) is shared by the switching elements 1 of multiple pixels Pix arranged in the column direction. Multiple scanning lines SCL(n) are arranged along the column direction. The scanning line SCL(n) extends along the row direction. The scanning line SCL(n) is shared by the switching elements 1 of multiple pixels Pix arranged in the row direction.

[0023] In the present disclosure, the direction in which the scanning lines SCL(n) extend is defined as the X direction (first direction), and the direction in which the multiple scanning lines SCL(n) are arranged is defined as the Y direction (second direction).

[0024] The common electrode 6 is connected to a VCOM drive circuit 10. The VCOM drive circuit 10 applies a common potential to the common electrode 6.

[0025] The scanning circuit 9 sequentially supplies a driving signal that functions as an on-potential (driving potential) of the switching element 1 to the scanning line SCL(n) to which the multiple pixels Pix aligned in the X direction (first direction) are connected. In other words, the scanning circuit 9 simultaneously supplies the driving signal to the multiple pixels Pix aligned in the X direction (first direction). The scanning circuit 9 also sequentially supplies the driving signal to the multiple pixels Pix aligned in the Y direction (second direction).

[0026] The signal output circuit 8 sequentially supplies pixel signals that function as pixel data (hereinafter also referred to as "pixel data") corresponding to each pixel Pix to signal lines SDL(m) to which multiple pixels Pix aligned in the Y direction (second direction) are connected. In other words, the signal output circuit 8 sequentially supplies pixel data to multiple pixels Pix aligned in the Y direction (second direction). The signal output circuit 8 also simultaneously supplies pixel data to multiple pixels Pix aligned in the X direction (first direction).

[0027] When the scanning circuit 9 supplies a drive signal to the scanning line SCL(n) and the switching elements 1 of the multiple pixels Pix arranged in the X direction (first direction) are controlled to be on, the signal output circuit 8 supplies a pixel signal to the signal line SDL(m), thereby charging the storage capacitance formed between the pixel electrodes 2 and the common electrode 6 of the multiple pixels Pix arranged in the X direction (first direction) and the liquid crystal 3 (particles 52) which serves as a capacitive load. As a result, a voltage corresponding to pixel data corresponding to each pixel Pix is ​​applied between the pixel electrodes 2 and the common electrode 6 of the multiple pixels Pix arranged in the X direction (first direction). The scanning circuit 9 sequentially supplies drive signals to the scanning lines SCL(n) arranged in the Y direction (second direction), and the signal output circuit 8 supplies pixel data corresponding to the multiple pixels Pix connected to the scanning line SCL(n) to which the drive signal is supplied by the scanning circuit 9, thereby writing pixel data for one subfield's worth of image (multiple monochrome images constituting one frame's worth of image).

[0028] After the switching element 1 is turned off, the voltage applied between the pixel electrode 2 and the common electrode 6 is maintained by the liquid crystal 3 (particles 52), which is a storage capacitor and a capacitive load. The degree of scattering of the liquid crystal 3 (particles 52) is controlled according to the voltage applied between the pixel electrode 2 and the common electrode 6 for each pixel Pix. The liquid crystal 3 may be, for example, a polymer dispersed liquid crystal in which the degree of scattering increases as the voltage applied between the pixel electrode 2 and the common electrode 6 for each pixel Pix increases, or may be a polymer dispersed liquid crystal in which the degree of scattering increases as the voltage applied between the pixel electrode 2 and the common electrode 6 for each pixel Pix decreases.

[0029] As shown in Fig. 3, a light source device L is disposed on the side of the display panel P (below the display panel P in Fig. 2). The light source device L includes a light source 11 that irradiates light onto the side surface of the display panel P, and a light source drive circuit 12 that controls the light source 11. The light source 11 includes a first light source 11R, a second light source 11G, and a third light source 11B.

[0030] The first light source 11R, the second light source 11G, and the third light source 11B each emit light under the control of a light source drive circuit 12. The first light source 11R, the second light source 11G, and the third light source 11B are light sources that use light-emitting elements such as light-emitting diodes (LEDs), but are not limited to this and may be any light source whose emission timing can be controlled.

[0031] The light source drive circuit 12 controls the light emission timing of the first light source 11R, the second light source 11G, and the third light source 11B under the control of the timing controller 13. In the present disclosure, the emission color (first color) of the first light source 11R is red (R), the emission color (second color) of the second light source 11G is green (G), and the emission color (third color) of the third light source 11B is blue (B).

[0032] When light is emitted from the light source 11, the display area 7 is illuminated by the light (first color, second color, third color) emitted from one side in the Y direction. Each pixel Pix transmits or scatters the light emitted from one side in the Y direction. The degree of scattering of the liquid crystal 3 for each pixel Pix depends on the state of the liquid crystal 3, which is controlled in accordance with the pixel signal for each pixel Pix.

[0033] The timing controller 13 is a circuit that controls the operation timing of the signal output circuit 8, the scanning circuit 9, the VCOM drive circuit 10, and the light source drive circuit 12. In the present disclosure, the timing controller 13 operates based on a signal input via the image processing circuit 70.

[0034] The image processing circuit 70 outputs a signal based on the display image data to the signal output circuit 8 and the timing controller 13. If pixel data is data indicating RGB gradation values ​​assigned to one pixel Pix among the multiple pixels Pix provided in the display area 7, the display image data input to the image processing circuit 70 to output a display image is a collection of multiple pixel data for each pixel Pix in the display area 7. The image processing circuit 70 may be provided on one of the substrates constituting the display panel P, or may be mounted on a flexible printed circuit board on which wiring and the like extending from the display panel P are provided, or may be configured to be provided outside the display panel P.

[0035] FIG. 4 is a timing chart showing sub-field periods and light emission periods in one frame period in which display image data is displayed.

[0036] In a display device 100 that performs display output using the FSC method, an image display period FP of one frame based on display image data is time-divided into a first sub-field period RF, a second sub-field period GF, and a third sub-field period BF, as shown in FIG.

[0037] During the vertical scanning period GateScan (first period) of the first sub-field period RF, pixel data is written according to the output gradation value of each pixel Pix corresponding to the first color (red (R)) of the display image data. As a result, a voltage according to the pixel data for each pixel Pix is ​​applied to the pixel electrode 2, and the scattering state of the liquid crystal 3 for each pixel Pix is ​​controlled according to the applied voltage to the pixel electrode 2.

[0038] In the subsequent light emission period RON (second period), the first light source 11R emits light. During this light emission period RON (second period), light of the first color (red (R)) corresponding to the pixel data for each pixel Pix written in the immediately preceding vertical scanning period GateScan is scattered and displayed.

[0039] During the vertical scanning period GateScan (first period) of the second sub-field period GF, pixel data is written according to the output gradation value of each pixel Pix corresponding to the second color (green (G)) of the display image data. As a result, a voltage according to the pixel data for each pixel Pix is ​​applied to the pixel electrode 2, and the scattering state of the liquid crystal 3 for each pixel Pix is ​​controlled according to the applied voltage to the pixel electrode 2.

[0040] In the subsequent light emission period GON (second period), the second light source 11G emits light. In this light emission period GON (second period), light of a second color (green (G)) corresponding to the pixel data for each pixel Pix written in the immediately preceding vertical scanning period GateScan is scattered and displayed.

[0041] During the vertical scanning period GateScan (first period) of the third sub-field period BF, pixel data is written according to the output gradation value of each pixel Pix corresponding to the third color (blue (B)) of the display image data. As a result, a voltage according to the pixel data for each pixel Pix is ​​applied to the pixel electrode 2, and the scattering state of the liquid crystal 3 for each pixel Pix is ​​controlled according to the applied voltage to the pixel electrode 2.

[0042] In the subsequent light emission period BON (second period), the third light source 11B emits light. In this light emission period BON (second period), light of a third color (blue (B)) corresponding to the pixel data for each pixel Pix written in the immediately preceding vertical scanning period GateScan is scattered and displayed.

[0043] In the above-described FSC display device 100, due to the afterimage phenomenon that occurs due to the limitations of the temporal resolution of the human eye, an image that is a composite (mixture) of three colors, namely, a first color (red (R)), a second color (green (G)), and a third color (blue (B)), is perceived. Furthermore, in the FSC display device 100, there is no need to provide a color filter for each pixel Pix, so the light transmittance in the display area 7 can be increased.

[0044] Fig. 5 is a diagram showing a first example of imaging timing in an imaging device and display timing in a display device. Fig. 6 is a diagram showing a second example of imaging timing in an imaging device and display timing in a display device. Here, an example is shown in which one frame period IF for imaging one frame of image by the imaging device 300 is (1 / 24) s (in other words, the imaging frame rate of the imaging device 300 is 24 fps), and the shutter speed of the imaging device 300 is (1 / 48) s. Note that the imaging frame rate of the imaging device 300 is not limited to 24 fps. Furthermore, the shutter speed of the imaging device 300 is not limited to (1 / 48) s.

[0045] 5 shows an example in which one frame period FP for displaying one frame of an image on the display device 100 is (1 / 60) s (in other words, the display frame rate of the display device 100 is 60 fps). In this case, the balance between the subfield periods RF, GF, and BF included in the period ((1 / 48) s) in which the shutter of the imaging device 300 is open is lost (for example, RF:GF:BF=1.75:1:1 or RF:GF:BF=1:1.5:1.25 in the example shown in FIG. 5), and coloring occurs in the display image of the display device 100 captured in each imaging frame of the imaging device 300.

[0046] 6 shows an example in which one frame period FP for displaying one frame of an image on the display device 100 is (1 / 48) s (in other words, the display frame rate of the display device 100 is 48 fps). In this case, the balance between the subfield periods RF, GF, and BF included in the period ((1 / 48) s) in which the shutter of the imaging device 300 is open is not lost (as shown in FIG. 6, RF:GF:BF=1:1:1), and no coloring occurs in the display image of the display device 100 captured in each imaging frame of the imaging device 300.

[0047] The display system 200 according to the present disclosure is configured to be able to change the frame rate of the display device 100. A specific example of changing the frame rate in the display device 100 will be described below.

[0048] Fig. 7 is a first conceptual diagram showing a first specific example of frame rate change in a display device. Fig. 8 is a second conceptual diagram showing a first specific example of frame rate change in a display device.

[0049] 7 and 8, the display device 100 repeats a period P in which the display frame rate is changed stepwise (for example, in 1 fps increments) from a first frame rate (for example, 60 fps) to a second frame rate (for example, 120 fps). As a result, when the display frame rate is 96 fps, the balance between the subfield periods RF, GF, and BF included in the period ((1 / 48) s) in which the shutter of the imaging device 300 is open is not lost, and no coloring occurs in the display image of the display device 100 captured in the imaging frame of the imaging device 300. As a result, the display image of the display device 100 can be captured without coloring.

[0050] Fig. 9A is a first conceptual diagram showing a second specific example of frame rate change in a display device. Fig. 9B is a second conceptual diagram showing a second specific example of frame rate change in a display device. Fig. 10 is a third conceptual diagram showing a second specific example of frame rate change in a display device.

[0051] 9A, 9B, and 10, the display device 100 repeats a first period P1 in which the display frame rate is changed stepwise (e.g., in 1 fps increments) from a first frame rate (e.g., 60 fps) to a second frame rate (e.g., 120 fps) and a second period P2 in which the display frame rate is changed stepwise (e.g., in 1 fps increments) from the second frame rate (here, 120 fps) to the first frame rate (here, 60 fps). As a result, when the display frame rate is 96 fps, the balance between the subfield periods RF, GF, and BF included in the period ((1 / 48) s) in which the shutter of the imaging device 300 is open is not lost, and no coloring occurs in the display image of the display device 100 captured in the imaging frame of the imaging device 300. As a result, the display image of the display device 100 can be captured without coloring.

[0052] Fig. 11 is a diagram showing a third example of the imaging timing in the imaging device and the display timing in the display device, and Fig. 12 is a diagram showing a fourth example of the imaging timing in the imaging device and the display timing in the display device.

[0053] The third example shown in FIG. 11 and the fourth example shown in FIG. 12 illustrate an embodiment in which one frame period FP (=60 fps) includes a dummy field period DF in which no display is performed.

[0054] 11 shows an example in which the display frame rate is 60 fps. In this case, the balance between the subfield periods RF, GF, and BF included in the period ((1 / 48) s) in which the shutter of the imaging device 300 is open is lost (for example, RF:GF:BF=2:1:1 or RF:GF:BF=1:1:2 in the example shown in FIG. 11), and coloring occurs in the display image of the display device 100 captured in each imaging frame of the imaging device 300.

[0055] 12 shows an example in which the display frame rate is 48 fps. In this case, the balance between the subfield periods RF, GF, and BF included in the period ((1 / 48) s) in which the shutter of the imaging device 300 is open is maintained (RF:GF:BF=1:1:1 as shown in FIG. 12), and no coloring occurs in the display image of the display device 100 captured in each imaging frame of the imaging device 300.

[0056] 11 and the fourth example shown in Fig. 12, in an aspect including a dummy field period DF in which no display is performed in one frame period FP (=60 fps), the display frame rate can be changed by changing the length of the dummy field period DF without changing the lengths of the subfield periods RF, GF, and BF. This makes it possible to capture the display image of the display device 100 without coloring.

[0057] (Embodiment 2) Fig. 13 is a diagram showing a schematic configuration of a display system according to embodiment 2. Fig. 14 is a conceptual diagram showing a third specific example of frame rate change in a display device. In a display system 200a according to embodiment 2 shown in Fig. 13, the display device 100a includes a switch SW for changing the display frame rate.

[0058] An example of the switch SW is a configuration that allows multiple settings using binary codes, such as a DIP (Dual In-line Package) switch. Note that the switch SW is not limited to a physical switch configured by hardware, such as a DIP switch, and may be a software switch realized by, for example, a PLD (Programmable Logic Device) such as an FPGA (Field Programmable Gate Array) or an MCU (Micro Control Unit).

[0059] Fig. 14 shows an example in which a two-circuit DIP switch is provided as the switch SW. In the example shown in Fig. 14, one of 48 fps, 60 fps, 72 fps, and 84 fps can be selected as the display frame rate by combining the "0" and "1" states of SW1 and the "0" and "1" states of SW2.

[0060] 14, by selecting 48 fps as the display frame rate, the balance between the subfield periods RF, GF, and BF included in the period ((1 / 48) s) in which the shutter of the imaging device 300 is open is not lost, and no coloring occurs in the display image of the display device 100a captured in each imaging frame of the imaging device 300. This makes it possible to capture the display image of the display device 100a without coloring.

[0061] Although preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to such embodiments. The contents disclosed in the embodiments are merely examples, and various modifications are possible within the scope of the present disclosure. For example, appropriate modifications made within the scope of the present disclosure naturally fall within the technical scope of the present invention. [Explanation of symbols]

[0062] 3 LCD 7 Display area 11 Light source 11R 1st light source 11G 2nd light source 11B Third light source 70 Image processing circuit 100,100a display device 200,200a display system 300 Imaging device 400 Network 500 Information terminal 600 LCD shutter DPM Display Panel Module IR imaging range L light source device P Display Panel PA Subject SW switch

Claims

1. a display device having a display panel; an imaging device that captures an image including at least the display panel within an imaging range; and One frame period for displaying one frame of an image on the display panel includes a plurality of subfield periods for displaying different colors, The display device is configured to be able to change the frame rate. Display system.

2. The display device changes the frame rate for each frame. The display system of claim 1 .

3. The display device includes: repeating a period in which the frame rate is changed in a stepwise manner from a first frame rate to a second frame rate different from the first frame rate; The display system of claim 2 .

4. The display device includes: a first period in which the frame rate is changed in a stepwise manner from a first frame rate to a second frame rate different from the first frame rate, and a second period in which the frame rate is changed in a stepwise manner from the second frame rate to the first frame rate, are repeated; The display system of claim 2 .

5. The display device is provided with a switch for changing the frame rate. The display system of claim 1 .

6. The plurality of subfield periods are a first subfield period in which a first color is displayed; a second subfield period in which a second color different from the first color is displayed; a third sub-field period in which a third color different from the first color and the second color is displayed; Including, A display system according to any one of claims 1 to 5.

7. the one frame period includes a dummy field period in which no display is performed, the display device changes the length of the dummy field period to change the frame rate. The display system of claim 6.

8. The display panel is a liquid crystal panel in which a polymer dispersed liquid crystal is sealed. A display system according to any one of claims 1 to 5.

9. The display device is a transparent display configured to allow an image transmitted through the display panel to be visible. A display system according to any one of claims 1 to 5.

Images