Display system

Abstract

To provide a display system capable of maintaining transparency of an active region by rotating a display device.SOLUTION: A display system comprises: a display device having an active area in which a plurality of pixels is arranged, and having a plurality of display panels that displays an image in the active area; and a rotation device provided to be able to rotate the display device, where the pixels are surrounded by adjacent signal lines and adjacent scanning lines, the scanning lines extend along a first direction and are arranged at intervals in a second direction intersecting the first direction, the signal lines extend along the second direction and are arranged at intervals in the first direction, and the plurality of display panels is arranged in a circumferential direction around a rotation center of the rotation device.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] A display device is known that includes a first light-transmitting substrate, a second light-transmitting substrate arranged opposite the first light-transmitting substrate, a liquid crystal layer having a polymer-dispersed liquid crystal sealed between the first light-transmitting substrate and the second light-transmitting substrate, and at least one light-emitting unit arranged opposite at least one side surface of the first light-transmitting substrate and the second light-transmitting substrate (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-021974 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the display device described in Patent Document 1, the scanning lines and signal lines are thick, so that the wiring portions in the active region stand out, and there is a possibility that the transparency of the display panel cannot be maintained.

[0005] It is an object of the present invention to provide a display system that can maintain the transparency of the active area by rotating the display device. [Means for solving the problem]

[0006] A display system according to one embodiment of the present disclosure comprises a display device having an active area in which a plurality of pixels are arranged, the display device having a plurality of display panels that display an image in the active area, and a rotation device arranged to rotate the display device, wherein the pixels are surrounded by adjacent signal lines and adjacent scanning lines, the scanning lines extend along a first direction and are arranged at intervals in a second direction intersecting the first direction, the signal lines extend along the second direction and are arranged at intervals in the first direction, and the plurality of display panels are arranged in a circumferential direction around a rotation center of the rotation device. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a front view illustrating an example of a display system according to the present embodiment. [Diagram 2] FIG. 2 is a side view illustrating an example of a display system according to the present embodiment. [Diagram 3] FIG. 3 is a block diagram showing a display system according to the present embodiment. [Figure 4] FIG. 4 is an explanatory diagram showing the relationship between the display element radius and the rotation angle, and between the display element radius and the display element angle. [Diagram 5] FIG. 5 is a perspective view illustrating an example of the display device according to the first embodiment. [Figure 6] FIG. 6 is a block diagram illustrating the display device of the first embodiment. [Figure 7] FIG. 7 is an explanatory diagram showing the relationship between the voltage applied to the pixel electrode and the scattering state of the pixel. [Figure 8a] FIG. 8a is a cross-sectional view showing an example of use of the display device of FIG. 5 during monochromatic emission. [Figure 8b] FIG. 8b is a cross-sectional view showing an example of use of the display device of FIG. 5 when no light is emitted. [Figure 9] FIG. 9 is a plan view showing the plane of the display device of FIG. [Figure 10] FIG. 10 is an enlarged cross-sectional view of the liquid crystal layer portion of FIG. 8a. [Figure 11]FIG. 11 is a cross-sectional view for explaining the non-scattering state in the liquid crystal layer. [Figure 12] FIG. 12 is a cross-sectional view for explaining a scattering state in the liquid crystal layer. [Figure 13] FIG. 13 is a plan view showing transmissive and non-transmissive areas of the display system. [Figure 14] FIG. 14 is a plan view showing an arbitrary display image visually recognized from the observer side. [Figure 15] FIG. 15 is an explanatory diagram showing the change over time of an arbitrary displayed image represented by the radius of the display element and the rotation angle. [Figure 16] FIG. 16 is an explanatory diagram showing the change over time of an arbitrary displayed image represented by the display element radius and the display element angle. [Figure 17] FIG. 17 is a flowchart showing the flow of pixel drawing processing in the display device of the first embodiment. [Figure 18] FIG. 18 is an explanatory diagram showing the presence or absence of pixels corresponding to the display element radius and the display element angle. [Figure 19a] FIG. 19a is an explanatory diagram showing the change in the shift amount during data transmission in an arbitrary displayed image represented by the display element radius and the display element angle. [Figure 19b] FIG. 19b is a time chart of display data when an image is generated on a frame-by-frame basis. [Figure 19c] FIG. 19c is a time chart of display data when shift correction is performed in line units. [Figure 20] FIG. 20 is a graph showing the relationship between the display element radius and the element packing rate in the display device of the first embodiment. [Figure 21] FIG. 21 is a graph showing the relationship between the radius of the display element and the correction factor for the grayscale value in the display device of the first embodiment. [Figure 22] FIG. 22 is a plan view illustrating an example of a display system according to Modification 1 of the first embodiment. [Diagram 23] FIG. 23 is a graph showing the relationship between the display element radius and the element packing ratio in the display device according to the first modification of the first embodiment. [Figure 24] FIG. 24 is a graph showing the relationship between the radius of the display element and the correction factor for the grayscale value in the display device according to the first modification of the first embodiment. [Diagram 25] FIG. 25 is a plan view illustrating an example of a display system according to the second modification of the first embodiment. [Figure 26] FIG. 26 is a graph showing the relationship between the display element radius and the element packing rate in the display device according to the second modification of the first embodiment. [Figure 27] FIG. 27 is a graph showing the relationship between the radius of the display element and the correction factor for the grayscale value in the display device according to the second modification of the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, each embodiment of the present disclosure will be described with reference to the drawings. Note that the disclosure is merely an example, and those who are skilled in the art can easily come up with appropriate modifications while maintaining the gist of the invention are naturally included in the scope of the present disclosure. In addition, in order to make the explanation clearer, the drawings may be schematic in terms of the width, thickness, shape, etc. of each part compared to the actual embodiment, but they are merely examples and do not limit the interpretation of the present disclosure. In addition, in this specification and each figure, elements similar to those described above with respect to the previous figures may be given the same reference numerals, and detailed explanations may be omitted as appropriate.

[0009] (Embodiment 1) The overall configuration of the display system 1 will be described. FIG. 1 is a plan view showing an example of the display system according to the present embodiment. FIG. 2 is a side view showing an example of the display system according to the present embodiment. FIG. 3 is a block diagram showing the display system according to the present embodiment. FIG. 4 is an explanatory diagram showing the relationship between the display element radius and the appearance angle, and between the display element radius and the display element angle. FIG. 5 is a perspective view showing an example of the display device according to the present embodiment. As shown in FIG. 1, the display system 1 includes a display device 100, a light-shielding panel 200, a rotation device 300, and a control circuit 400. Here, one direction of the plane of the display system 1 is the first direction Dx, a direction perpendicular to the first direction Dx is the second direction Dy, and a direction perpendicular to the Dx-Dy plane is the third direction Dz. In addition, "planar view" means viewing the display device 1 from the -Dz side toward the +Dz side along the third direction Dz. Note that the directions of Dx, Dy, and Dz are only examples, and the present disclosure is not limited to these directions.

[0010] 1 and 2, the rotation device 300 includes a mounting portion 310, a shaft 320, and a motor 330. As shown in FIG. 2, the mounting portion 310 is connected to the shaft 320 via a slip ring SR in the third direction Dz. The shaft 320 is connected to the motor 330 disposed at a position opposite the mounting portion 310 in the third direction Dz. The mounting portion 310 has a circular shape. Note that the shape of the mounting portion 310 may be any shape that can fix the display panel 2, and may be, for example, a polygonal shape.

[0011] 1 and 2, in the rotating device 300, when the motor 330 is driven, the shaft 320 rotates around a rotation axis AX that passes through a rotation center O and extends along the third direction Dz. The shaft 320 is coupled to the mounting portion 310, and the mounting portion 310 rotates in response to the rotation of the shaft 320. In this embodiment, the mounting portion 310 and the shaft 320 are provided to be rotatable around the rotation axis AX, and rotate clockwise or counterclockwise as viewed in the third direction Dz.

[0012] As shown in FIG. 1, the display device 100 includes four display devices 100. As shown in FIG. 1 and FIG. 5, each display device 100 has a display panel 2, a light source 3, and a driving circuit 4. As shown in FIG. 5, the display panel 2 includes an array substrate 10, a counter substrate 20, and a liquid crystal layer 50 (see FIG. 9). The driving circuit 4 is fixed to the surface of the array substrate 10. The array substrate 10 includes a second side surface 10D on the driving circuit 4 side. The counter substrate 20 faces the surface of the array substrate 10 in a direction perpendicular to the surface of the array substrate 10 (the Dz direction shown in FIG. 4). In the liquid crystal layer 50 (see FIG. 8a), a polymer-dispersed liquid crystal LC described later is sealed between the array substrate 10, the counter substrate 20, and a sealing portion 18.

[0013] 1, the two display devices 100 on one side face each other in the first direction Dx with the rotation device 300 therebetween. The two display devices 100 on the other side face each other in the second direction Dy with the rotation device 300 therebetween. The active area AA side of each display panel 2 is disposed on the -Dz side along the third direction Dz, and the second side surface 10D side is fixed to the attachment portion 310. The display panels 2 are arranged in a circumferential direction around the rotation center O of the rotation device 300.

[0014] This enables the display panel 2, together with the mounting portion 310 and the shaft 320, to rotate around the rotation axis AX, and an observer can view the time-averaged brightness of any display image displayed within the active area AA at the position of each display panel 2 as the display panel 2 rotates at high speed.

[0015] As shown in FIG. 5, the display panel 2 has an active area AA capable of displaying an image, and a peripheral area FR outside the active area AA. In the active area AA, a plurality of pixels Pix are arranged in a matrix. In this disclosure, a row refers to a pixel row having m pixels Pix arranged in one direction. Also, a column refers to a pixel column having n pixels Pix arranged in a direction perpendicular to the direction in which the rows are arranged. The values ​​of m and n are determined according to the display resolution in the vertical direction and the display resolution in the horizontal direction. Also, a plurality of scanning lines GL are wired for each row, and a plurality of signal lines SL are wired for each column.

[0016] 1 and 2, the light-shielding panel 200 is disposed on the -Dz side of the rotation device 300 and the display device 100 in the third direction Dz in a plan view. The light-shielding panel 200 blocks light from the display panel 2 overlapping with the light-shielding panel 200. The light-shielding panel 200 is formed of a black resin or metal material. Note that, in the first embodiment, the light-shielding panel 200 is formed in a sector shape in a plan view, but may be, for example, a shape with a part of a square, polygon, or the like cut out.

[0017] 1 and 2, the control circuit 400 is fixed to the mounting portion 310. As shown in Fig. 3, the control circuit 400 has a controller IC, an angular velocity sensor 440, and a receiver 460. The control circuit 400 is electrically connected to each display panel 2. The controller IC has a memory circuit 410, a display position calculation circuit 420, and a display conversion circuit 430.

[0018] The control circuit 400 is supplied with power and a drive signal from an external drive power source AW via a slip ring SR. The slip ring SR separates the power and the drive signal on the rotating device 300 side. The slip ring SR can prevent twisting and interference of the wiring.

[0019] The memory circuit 410 stores data of the external display position (X, Y). As shown in Fig. 4, the external display position (X, Y) is a coordinate system with the rotation center O as the origin, which indicates the position of a display image viewed from the observer side when the display panel 2 rotates in a circumferential direction around the rotation center O. The coordinate X indicates the coordinate of a position parallel to the first direction Dx. The coordinate Y indicates the coordinate of a position parallel to the second direction Dy.

[0020] The storage circuit 410 includes a coordinate conversion table 411. A correspondence table or a relational expression showing the relationship between the display element radius r and the display element angle Φ and the display element position (x, y) is input to the coordinate conversion table 411. The storage circuit 410 stores the data input to the coordinate conversion table 411.

[0021] Here, as shown in Fig. 4, the display element radius r represents the distance from the rotation center O to each lit pixel Pix in the display image T0. The display element angle Φ is an angle representing how much the display element radius r is shifted from the second reference line CL2, which is shifted by π / 4 counterclockwise around the rotation center O from the first reference line CL1 passing through the center of the active area AA along the second direction Dy, as shown in Fig. 4.

[0022] 4, the display element position (x, y) represents the position of each lit pixel Pix in the display image T0 displayed in the active AA. The display element position (x, y) is a coordinate with the origin o being the intersection of the reference line CL2 and the pixel Pix closest to the rotation center O. The coordinate x represents the coordinate of a position parallel to the first direction Dx. The coordinate y represents the coordinate of a position parallel to the second direction Dy.

[0023] The angular velocity sensor 440 detects the angular velocity ω of the rotationally driven display panel 2. The angular velocity ω is the speed per unit time of the display panel 2 rotating in the circumferential direction around the rotation center O. For example, when the radius of the display element of the display panel 2 is 25 cm, the angular velocity ω is, for example, 1080° / s or more.

[0024] The angle sensor 441 is disposed on the rotationally driven shaft 320, and detects the rotation angle θ of the shaft 320. The rotation angle θ is the rotation angle of the display panel 2 in the circumferential direction around the rotation center O from the first reference line CL1, as shown in FIG.

[0025] The display position calculation circuit 420 calculates the display element radius r and the rotation angle θ from the coordinates X and Y of the appearance display position stored in the storage circuit 410 according to the following formulas (1-1) to (1-3).

[0026]

number

[0027] This converts the coordinates from the Cartesian coordinate system (X, Y) of the appearance display to the polar coordinate system (r, θ) of the appearance display.

[0028] Next, the display position calculation circuit 420 calculates the display element angle Φ from the display element radius r, the rotation angle θ detected by the angle sensor 441, and the angular velocity ω detected by the angular velocity sensor 440 according to the following formulas (2-1) to (2-3).

[0029]

number

[0030] When the display panel 2 at i=0 is parallel to the second direction Dy and is located on the +Dy side of the second direction Dy, the display panel 2 at i=1 is positioned at a position shifted by π / 2 counterclockwise in the circumferential direction around the rotation center O relative to the display panel 2 at i=0. The display panel 2 at i=2 is positioned at a position shifted by π / 2 counterclockwise in the circumferential direction around the rotation center O relative to the display panel 2 at i=1. The display panel 2 at i=3 is positioned at a position shifted by π / 2 counterclockwise in the circumferential direction around the rotation center O relative to the display panel 2 at i=2.

[0031] The display conversion circuit 430 converts the display element radius r and display element angle Φ (=Φi) calculated by the display position calculation circuit 420 into x coordinates and y coordinates based on the correspondence table or relational expressions (formulas (2-1) to (2-3)) input to the coordinate conversion table 411 for each display panel 2.

[0032] A display signal DS1 that drives a display image is transmitted to an externally located transmitter 450. The transmitter 450 wirelessly communicates with a receiver 460. The receiver 460 transmits the display signal DS1 to a display conversion circuit 430.

[0033] The control circuit 400 controls the display panel 2 in response to the display signal DS1 so that the display elements are displayed at the x-coordinate and y-coordinate positions of the respective display panels 2 while sliding over time.

[0034] Next, the display device will be described in detail with reference to Fig. 6, which is a block diagram showing the display device of Fig. 5.

[0035] The light source 3 includes a plurality of light-emitting units 31. As shown in Fig. 6, the light source control unit 32 is included in the drive circuit 4. The light source control unit 32 may be a circuit separate from the drive circuit 4. The light-emitting units 31 and the light source control unit 32 are electrically connected by wiring in the array substrate 10.

[0036] 6, the drive circuit 4 includes a signal processing circuit 41, a pixel control circuit 42, a gate drive circuit 43, a source drive circuit 44, and a common potential drive circuit 45. The array substrate 10 has a larger area in the Dx-Dy plane than the counter substrate 20, and the drive circuit 4 is provided on the protruding portion of the array substrate 10 exposed from the counter substrate 20.

[0037] An input signal (such as an RGB signal) VS is input to the signal processing circuit 41 from an image output unit 91 of an external upper level control unit 9 via a flexible substrate 92.

[0038] The signal processing circuit 41 includes an input signal analysis unit 412 and a signal adjustment unit 413. The input signal analysis unit 412 generates a second input signal VCS based on a first input signal VS input from the outside.

[0039] The second input signal VCS is a signal that determines, based on the first input signal VS, what gradation value is to be given to each pixel Pix of the display panel 2. In other words, the second input signal VCS is a signal that includes gradation information related to the gradation value of each pixel Pix.

[0040] The signal adjustment unit 413 generates a third input signal VCSA from the second input signal VCS. The signal adjustment unit 413 sends the third input signal VCSA to the pixel control circuit 42, and sends a light source control signal LCSA to the light source control unit 32. The light source control signal LCSA is, for example, a signal including information on the amount of light of the light-emitting unit 31 that is set according to the input gradation value to the pixel Pix. For example, when a dark image is displayed, the amount of light of the light-emitting unit 31 is set to be small. When a bright image is displayed, the amount of light of the light-emitting unit 31 is set to be large.

[0041] The pixel control circuit 42 then generates a horizontal drive signal HDS and a vertical drive signal VDS based on the third input signal VCSA.

[0042] The gate drive circuit 43 sequentially selects the scanning lines GL of the display panel 2 within one vertical scanning period based on the horizontal drive signal HDS. The order in which the scanning lines GL are selected is arbitrary.

[0043] The source drive circuit 44 supplies a gray scale signal corresponding to the output gray scale value of each pixel Pix to each signal line SL of the display panel 2 within one horizontal scanning period based on the vertical drive signal VDS.

[0044] In this embodiment, the display panel 2 is an active matrix panel, which has signal (source) lines SL extending in the second direction Dy and scanning (gate) lines GL extending in the first direction Dx in a plan view, and has switching elements Tr at the intersections of the signal lines SL and the scanning lines GL.

[0045] A thin film transistor is used as the switching element Tr. A bottom gate type transistor or a top gate type transistor may be used as the thin film transistor. Although a single gate thin film transistor is illustrated as the switching element Tr, a double gate transistor may be used. One of the source electrode and the drain electrode of the switching element Tr is connected to the signal line SL, the gate electrode is connected to the scanning line GL, and the other of the source electrode and the drain electrode is connected to one end of the capacitance of a polymer dispersed liquid crystal LC described later. One end of the capacitance of the polymer dispersed liquid crystal LC is connected to the switching element Tr via the pixel electrode PE, and the other end is connected to the common potential wiring COML via the common electrode CE. In addition, a storage capacitance HC is generated between the pixel electrode PE and the storage capacitance electrode IO electrically connected to the common potential wiring COML. In addition, the common potential wiring COML is supplied from a common potential driving circuit 45.

[0046] The light emitting unit 31 includes a first color (e.g., red) light emitter 33R, a second color (e.g., green) light emitter 33G, and a third color (e.g., blue) light emitter 33B. Based on a light source control signal LCSA, the light source control unit 32 controls the first color light emitter 33R, the second color light emitter 33G, and the third color light emitter 33B to emit light simultaneously and emit white light. This causes a scattered image to be displayed depending on the presence or absence of light scattering. The emitted light is not limited to white light emission, and any monochromatic light emission may be used.

[0047] FIG. 7 is an explanatory diagram showing the relationship between the voltage applied to a pixel electrode and the scattering state of a pixel. FIG. 8a is a cross-sectional view showing an example of use of the display device of FIG. 5 when emitting monochromatic light. FIG. 8b is a cross-sectional view showing an example of use when no light is emitted. FIG. 9 is a plan view showing the plane of the display device of FIG. 5. FIG. 10 is an enlarged cross-sectional view of the liquid crystal layer portion of FIG. 8a. FIG. 11 is a cross-sectional view for explaining the non-scattering state in the liquid crystal layer. FIG. 12 is a cross-sectional view for explaining the scattering state in the liquid crystal layer.

[0048] If a grayscale signal corresponding to the output grayscale value of each pixel Pix selected within one vertical scanning period GateScan is supplied to each of the signal lines SL described above, the voltage applied to the pixel electrode PE changes according to the grayscale signal. When the voltage applied to the pixel electrode PE changes, the voltage between the pixel electrode PE and the common electrode CE changes. Then, as shown in FIG. 4, the scattering state of the liquid crystal layer 50 for each pixel Pix is ​​controlled according to the voltage applied to the pixel electrode PE, and the scattering ratio within the pixel Pix changes.

[0049] 7, when the voltage applied to the pixel electrode PE becomes equal to or higher than the saturation voltage Vsat, the change in the scattering ratio in the pixel Pix becomes smaller. Therefore, the drive circuit 4 changes the voltage applied to the pixel electrode PE in accordance with the vertical drive signal VDS in a voltage range Vdr lower than the saturation voltage Vsat.

[0050] As shown in Figures 8a and 9, the array substrate 10 has a first main surface 10A, a second main surface 10B, a first side surface 10C, a second side surface 10D, a third side surface 10E, and a fourth side surface 10F. The first main surface 10A and the second main surface 10B are parallel planes. The first side surface 10C and the second side surface 10D are parallel planes. The third side surface 10E and the fourth side surface 10F are parallel planes.

[0051] As shown in Figures 8a and 9, the counter substrate 20 has a first main surface 20A, a second main surface 20B, a first side surface 20C, a second side surface 20D, a third side surface 20E, and a fourth side surface 20F. The first main surface 20A and the second main surface 20B are parallel planes. The first side surface 20C and the second side surface 20D are parallel planes. The third side surface 20E and the fourth side surface 20F are parallel planes.

[0052] As shown in Fig. 8a and Fig. 9, the light source 3 faces the second side surface 20D of the counter substrate 20. The light source 3 is sometimes called a side light source. As shown in Fig. 5, the light source 3 irradiates the light source light L to the second side surface 20D of the counter substrate 20. The second side surface 20D of the counter substrate 20 facing the light source 3 serves as a light incident surface.

[0053] 8a, the light source light L emitted from the light source 3 propagates in a direction (second direction Dy) away from the second side surface 20D while being reflected by the first main surface 10A of the array substrate 10 and the first main surface 20A of the counter substrate 20. When the light source light L travels from the first main surface 10A of the array substrate 10 or the first main surface 20A of the counter substrate 20 to the outside, it travels from a medium with a large refractive index to a medium with a small refractive index. Therefore, if the incident angle of the light source light L on the first main surface 10A of the array substrate 10 or the first main surface 20A of the counter substrate 20 is larger than the critical angle, the light source light L is totally reflected by the first main surface 10A of the array substrate 10 or the first main surface 20A of the counter substrate 20.

[0054] 8a, the light source light L propagating inside the array substrate 10 and the counter substrate 20 is scattered by pixels Pix having liquid crystal in a scattering state, and the incident angle of the scattered light becomes smaller than the critical angle, so that emitted light 68, 68A is radiated to the outside from the first main surface 20A of the counter substrate 20 and the first main surface 10A of the array substrate 10, respectively. The emitted light 68, 68A radiated to the outside from the first main surface 20A of the counter substrate 20 and the first main surface 10A of the array substrate 10, respectively, is observed by an observer.

[0055] 8b, the external light L2 is scattered by the pixel Pix, and a cloud-like pattern is visually recognized. When there is sufficient external light, the observer can observe a scattered image even if the light-emitting unit 31 is not used and light is not emitted.

[0056] Next, the polymer dispersed liquid crystal in the scattering state and the polymer dispersed liquid crystal in the non-scattering state will be described with reference to FIGS.

[0057] As shown in FIG. 10, the array substrate 10 is provided with a first alignment film AL1. The counter substrate 20 is provided with a second alignment film AL2. When the alignment film is subjected to an alignment treatment, for example, the alignment direction of the first alignment film AL1 is one side of a first direction Dx, and the alignment direction of the second alignment film AL2 is the other side of the first direction Dx. The first alignment film AL1 and the second alignment film AL2 may be, for example, vertical alignment films, or may be alignment films that are aligned in the first direction Dx in which the multiple light emitting sections 31 are arranged. The alignment treatment is performed by a rubbing treatment or a photo-alignment treatment.

[0058] 11 is filled between the array substrate 10 and the counter substrate 20. Next, in a state in which the monomer and liquid crystal are aligned by the first alignment film AL1 and the second alignment film AL2, the monomer is polymerized by ultraviolet light or heat to form a three-dimensional mesh-like polymer network 510. This forms the liquid crystal layer 500 having a reverse mode polymer dispersed liquid crystal LC in which liquid crystal molecules 520 are dispersed in the gaps of the three-dimensional mesh-like polymer network 510 formed in a mesh shape.

[0059] Thus, the polymer dispersed liquid crystal LC has a three-dimensional mesh-like polymer network 510 and liquid crystal molecules 520 .

[0060] The orientation of the liquid crystal molecules 520 is controlled by the voltage difference between the pixel electrode PE and the common electrode CE. The voltage applied to the pixel electrode PE changes the orientation of the liquid crystal molecules 520. The change in the orientation of the liquid crystal molecules 520 changes the degree of scattering of light passing through the pixel Pix.

[0061] 11, when no voltage is applied between the pixel electrode PE and the common electrode CE, the optical axis Ax1 of the polymer network 510 and the optical axis Ax2 of the liquid crystal molecules 520 are oriented substantially the same as each other. The optical axis Ax2 of the liquid crystal molecules 520 is parallel to the first direction Dx (FIG. 8a) of the liquid crystal layer 500. The optical axis Ax1 of the polymer network 510 is also parallel to the first direction Dx of the liquid crystal layer 500 regardless of the presence or absence of a voltage.

[0062] The ordinary light refractive indexes of the polymer network 510 and the liquid crystal molecules 520 are equal to each other. When no voltage is applied between the pixel electrode PE and the common electrode CE, the difference in refractive index between the polymer network 510 and the liquid crystal molecules 520 is almost zero in all directions. The liquid crystal layer 500 is in a non-scattering state in which it does not scatter the light source light. The light source light propagates in a direction away from the light source 3 (light-emitting section 31). When the liquid crystal layer 500 is in a non-scattering state in which it does not scatter the light source light, the background on the first main surface 20A side of the counter substrate 20 is visible from the first main surface 10A of the array substrate 10, and the background on the first main surface 10A side of the array substrate 10 is visible from the first main surface 20A of the counter substrate 20.

[0063] 12, between the pixel electrode PE and the common electrode CE to which a voltage is applied, the optical axis Ax2 of the liquid crystal molecules 520 is tilted by the electric field generated between the pixel electrode PE and the common electrode CE. Since the optical axis Ax1 of the polymer network 510 does not change due to the electric field, the optical axis Ax1 of the polymer network 510 and the optical axis Ax2 of the liquid crystal molecules 520 are oriented in different directions. In the pixel Pix in which the pixel electrode PE to which a voltage is applied is located, the light source light is scattered. As described above, a part of the scattered light source light is radiated to the outside from the first main surface 10A of the array substrate 10 or the first main surface 20A of the counter substrate 20, and the light is observed by the observer.

[0064] In a pixel Pix having a pixel electrode PE to which no voltage is applied, the background on the first main surface 20A side of the counter substrate 20 is visible from the first main surface 10A of the array substrate 10, and the background on the first main surface 10A side of the array substrate 10 is visible from the first main surface 20A of the counter substrate 20. When the display device 1 of this embodiment receives a first input signal VS from the image output unit 91, a voltage is applied to the pixel electrode PE of the pixel Pix where an image is displayed, and an image based on the third input signal VCSA is visible together with the background. In this way, when the polymer dispersed liquid crystal LC is in a scattering state, an image is displayed in the display region.

[0065] An image displayed by light emitted to the outside after light source light is scattered in a pixel Pix having a pixel electrode PE to which a voltage is applied is superimposed on the background. In other words, the display device 1 of this embodiment can display an image superimposed on the background by combining the emitted light 68 or 68A with the background.

[0066] Fig. 13 is a plan view showing a transmissive region and a non-transmissive region of the display system, Fig. 14 is a plan view showing an arbitrary display image visually recognized from the observer side.

[0067] 13, the area where the shading panel 200 is located is a non-transmissive area DA where light is not transmitted. The shading panel 200 also has a cutout portion 210 where a part of the shading panel 200 is cut out. The cutout portion 210 is a transmissive area DB where light is transmitted.

[0068] 13, even if the display panel 2 is rotated counterclockwise, the observer OB can view the display panel 2 within the transmissive region DB. This allows the observer OB to recognize the display image T1 shown in FIG. 14, which is displayed on the display panel 2.

[0069] When the pixels Pix in the active area AA around the periphery of the display image T1 shown in Fig. 14 are in the first state, the background is visible around the display image T1. When the pixels Pix in the active area AA corresponding to the display image T1 are in the second state, the background becomes less visible around the display image T1, and the display image T1 becomes easier to view.

[0070] Here, the first state refers to a state in which the liquid crystal layer 500 is in a non-scattering state, the pixels Pix do not scatter light, and the background BG is visible, while the second state refers to a state in which the liquid crystal layer 500 is in a scattering state, the pixels Pix scatter light, and the display image T1 is displayed.

[0071] As a result, even when the display panel 2 is viewed in a rotated state, the scanning lines GL and signal lines SL in the active area AA are difficult to see, and the transparency of the pixels Pix can be maintained in the first state.

[0072] Here, as shown in FIG. 13, the radius r of the display element is a minimum value r 10 to maximum value r 25 The minimum value r 10 The size of is, for example, 10 mm, and the maximum value r 25 The size of the display element radius is, for example, 25 mm. 18 is the minimum value r 10 and the maximum value r 25 The intermediate value r 18 The size is 18mm.

[0073] Fig. 15 is an explanatory diagram showing the change over time of an arbitrary display image represented by the radius of a display element and the rotation angle. Fig. 16 is an explanatory diagram showing the change over time of an arbitrary display image represented by the radius of a display element and the angle of a display element.

[0074] As shown in FIG. 15, in the polar coordinate system (r, θ) of the appearance display, the display image T1 recognized by the observer OB is a still image. The position of a still image does not change with time. In other words, as shown in FIG. 16, the position of the display image T1 does not change in the polar coordinate system (r, θ) of the appearance display even with the passage of time. Therefore, the observer OB can view the display image T1 at the intended position.

[0075] As shown in FIG. 16, the display element angle Φi(x, y, t) of each display panel 2 depends on time, so that over time it shifts in the opposite direction to the rotation direction of the display panel 2, and the display image T1 in the active area AA is displayed sliding and moving at the same speed as the display panel 2 in the direction opposite to the rotation direction of the display panel 2.

[0076] As a result, when the display image T1 is converted into a display in the polar coordinate system (r, θ) of the appearance display shown in FIG. 15, the display image T1 is visually recognized by the observer OB as if it were a still image.

[0077] Also, a different image can be switched for each frame so that the display image T1 is displayed differently over time. At this time, as time passes, the display panel 2 shifts in the direction opposite to the direction of rotation, and the display image T1, which is displayed differently over time, is displayed while sliding at the same speed as the display panel 2.

[0078] As a result, when the display image T1 is converted into a display in the polar coordinate system (r, θ) of the appearance display shown in Figure 15, it is perceived by the observer OB as a moving image rather than a still image, as if the display image T1 is displayed moving over time.

[0079] Fig. 17 is a flowchart showing the flow of a drawing process for a pixel in the display device of embodiment 1. Fig. 18 is an explanatory diagram showing the presence or absence of a pixel corresponding to the display element radius and the display element angle.

[0080] The following describes a flow for drawing an image on the pixel Pix of each display panel 2. First, as shown in Fig. 17, the display position calculation circuit 420 calculates the display element radius r and the rotation angle θ from the coordinate X and coordinate Y of the appearance display position stored in the storage circuit 410 according to the formulas (1-1) to (1-3) (step S1).

[0081] This converts the coordinates from the Cartesian coordinate system (X, Y) of the appearance display to the polar coordinate system (r, θ) of the appearance display.

[0082] Next, display position calculation circuit 420 calculates display element angle Φi from display element radius r, rotation angle θ, and angular velocity ω detected by angular velocity sensor 440 according to formulas (2-1) to (2-3) (step S1).

[0083] The display conversion circuit 430 converts the display element radius r and the display element angle Φi calculated by the display position calculation circuit 420 into x coordinates and y coordinates (xi, yi) for each display panel 2.

[0084] Here, the presence or absence of pixels corresponding to the display element radius r and the display element angle Φi will be described. Fig. 18 is a graph in which the horizontal axis is the display element angle Φmap and the vertical axis is the display element radius r. Here, the display element angle Φi calculated in step S1 is set to the display element angle Φmap.

[0085] As shown in FIG. 18, the pixel display area AP is an area where the display element position (xi, yi) of the pixel Pix corresponding to the display element radius r and the display element angle Φmap exists. The non-pixel display area BP is an area where the display element position (xi, yi) of the pixel Pix corresponding to the display element radius r and the display element angle Φmap does not exist. Within the range of the display element angle Φmap from 0° to 360°, a mountain-shaped pixel display area AP is displayed for each display panel 2. At this time, the shift amount Φshift of the display element angle Φmap increases with the passage of time, and the area is divided into a drawing area AP1 that can be drawn at the display element position (xi, yi) and a non-drawing area BP1 that is not drawn at the display element position (xi, yi). Here, the shift amount Φshift is the amount of deviation, expressed in degrees, of the display element position (xi, yi) selected by the gate drive circuit 43 as time passes while each display panel 2 rotates at high speed.

[0086] After step S1, the display position calculation circuit 420 calculates the display element angle roll(Φi) according to the following formula (3-1) (step S2).

[0087]

number

[0088] Here, a correspondence table or a relational expression showing the relationship between the display element radius r and roll(Φi) and the display element position (xi, yi) is inputted into the coordinate conversion table 411. For example, when xy_Datatable(r,roll(φ)):exist (when the display element position (xi, yi) exists), the relational expression is (x_i, y_i)=xy_Datatable(r,roll(φ)).

[0089] The control circuit 400 determines whether or not there is a display element position (xi, yi) of the pixel Pix corresponding to the display element radius r and roll (Φi) (step S3).

[0090] In step S3, if it is determined that the display element position (xi, yi) exists (Yes in step S3), an image is drawn in the pixel Pix of each display panel 2 in the pixel display area AP (step S4).

[0091] On the other hand, if it is determined in step S3 that the display element position (xi, yi) does not exist (No in step S3), then since there is no display element position (xi, yi) of pixel Pix corresponding to the display element radius r and rоll(Φi), no image is drawn at pixel Pix in the non-pixel display area BP (step S5).

[0092] Next, a display update method of the display panel 2 will be described. Fig. 19a is an explanatory diagram showing the change in the shift amount during image data transmission in an arbitrary display image represented by the display element radius and the display element angle. As shown in Fig. 19a, a shift amount Φshift occurs in the display image T1 from image data AX1 to AX6 during the transmission of one frame of data.

[0093] Fig. 19b is a time chart of display data when an image is generated in units of frames. Fig. 19c is a time chart of display data when there is shift correction in units of lines. As shown in Fig. 19b, when an image is generated in units of frames, in order to correct the shift amount Φshift of the display data 90 in units of one frame, it is necessary to correct the shift amount Φshift of up to 2ωt. This is because an error occurs in the position where the image is displayed due to a rotational movement during updating of the display of one frame.

[0094] In contrast, as shown in FIG. 19c, in the case where line-by-line shift correction is performed, if the shift amount Φshift of the display data 90 is corrected in units of lines selected by the gate drive circuit 43, the error can be eliminated by simply correcting the maximum ωt.

[0095] Fig. 20 is a graph showing the relationship between the display element radius and the element packing rate in the display device of embodiment 1. Fig. 21 is a graph showing the relationship between the display element radius and the correction factor for the grayscale value in the display device of embodiment 1.

[0096] 13, in the display system 1 of the first embodiment, each display panel 2 has a rectangular shape in a plan view, and has long and short sides, with the long sides extending radially from a rotation center O. The display panels 2 are structured such that the gap between the display panels 2 becomes wider as they move away from the rotation center O in the circumferential direction.

[0097] With this structure, as shown in FIG. 20, the pixel Pix closest to the rotation center O (when the display element radius r is the minimum value r 10 ) from the pixel Pix farthest from the rotation center O (when the display element radius r is the maximum value r 25 ), the element filling rate of the pixels Pix that light up the display image T1 becomes lower.

[0098] Therefore, as shown in FIG. 21, the pixel Pix closest to the rotation center O (when the display element radius r is the minimum value r 10 ) from the pixel Pix farthest from the rotation center O (when the display element radius r is the maximum value r 25 ), the gradation value of the pixel Pix in the display image T1 is corrected to be larger as the gradation value becomes larger. Here, the correction rate when the gradation value is 255 is set to 100%.

[0099] This makes it possible to uniformly brighten the luminance of the display image T1 visually recognized by the observer OB.

[0100] (Modification 1 of the first embodiment) Fig. 22 is a plan view showing an example of a display system according to Modification 1 of Embodiment 1. Fig. 23 is a graph showing the relationship between the display element radius and the element packing rate in the display device according to Modification 1 of Embodiment 1. Fig. 24 is a graph showing the relationship between the display element radius and the correction factor for the gradation value in the display device according to Modification 1 of Embodiment 1. In the following description, the same components as those described in the above-mentioned embodiment are denoted by the same reference numerals, and duplicated description will be omitted.

[0101] In a display system 1A according to a first modification of the first embodiment, each display device 100A includes a display panel 2A, a light source 3A, and a drive circuit 4A, as shown in Fig. 22. Each of the display panels 2A, the light source 3A, and the drive circuit 4A has a fan shape in a plan view. The display panels 2A are structured such that the gap between the display panels 2 is uniform even if they are farther outward in the circumferential direction from the rotation center O.

[0102] With this structure, as shown in FIG. 23, the pixel Pix closest to the rotation center O (when the display element radius r is the minimum value r 10 ) from the pixel Pix farthest from the rotation center O (when the display element radius r is the maximum value r 25 ), the element filling rate of the pixels Pix that light up the display image T1 remains constant.

[0103] Therefore, as shown in FIG. 25, the pixel Pix closest to the rotation center O (when the display element radius r is the minimum value r 10 ) from the pixel Pix farthest from the rotation center O (when the display element radius r is the maximum value r 25 ), the gradation value of the pixel Pix in the display image T1 is corrected to be larger. This makes it possible to uniformly brighten the luminance of the display image T1 viewed by the observer OB.

[0104] (Modification 2 of the first embodiment) Fig. 25 is a plan view showing an example of a display system according to Modification 2 of Embodiment 1. Fig. 26 is a graph showing the relationship between the display element radius and the element packing rate in the display device according to Modification 2 of Embodiment 1. Fig. 27 is a graph showing the relationship between the display element radius and the correction factor for the gradation value in the display device according to Modification 2 of Embodiment 1. In the following description, the same components as those described in the above-mentioned embodiment are denoted by the same reference numerals, and duplicated description will be omitted.

[0105] 27, in a display system 1B according to the second modification of the first embodiment, each display device 100B includes a display panel 2, a light source 3, and a drive circuit 4. The number of each display device 100B is eight.

[0106] Each display panel 2 has a rectangular shape in a plan view, and has long and short sides, and the long sides extend radially from a rotation center O. In the display system 1B, the display element radius r is r 13 On the circumference when this is the case, the pixels Pix of the adjacent display panels 2 partially overlap each other. In this structure, the gap between the display panels 2 becomes wider as it goes further outward in the circumferential direction from the rotation center O.

[0107] The display position calculation circuit 420 in the display system 1B calculates the display element angle Φ from the display element radius r, the rotation angle θ, and the angular velocity ω detected by the angular velocity sensor 440 according to the following formula (3-1), and formulas (2-1) and (2-2).

[0108]

number

[0109] When the display panel 2 of i=0 is parallel to the second direction Dy and is located on the +Dy side of the second direction Dy, the display panel 2 of i=1 is located at a position shifted by π / 4 counterclockwise in the circumferential direction around the rotation center O from the display panel 2 of i=0. The display panel 2 of i=2 is located at a position shifted by π / 4 counterclockwise in the circumferential direction around the rotation center O from the display panel 2 in the state when i is 1. The display panel 2 of i=3 is located at a position shifted by π / 4 counterclockwise in the circumferential direction around the rotation center O from the display panel 2 of i=2. The display panel 2 of i=4 is located at a position shifted by π / 4 counterclockwise in the circumferential direction around the rotation center O from the display panel 2 in the state when i is 3. The display panel 2 of i=5 is located at a position shifted by π / 4 counterclockwise in the circumferential direction around the rotation center O from the display panel 2 in the state when i is 4. The display panel 2 at i=6 is positioned at a circumferential offset of π / 4 counterclockwise around the rotation center O relative to the display panel 2 at i=5. The display panel 2 at i=7 is positioned at a circumferential offset of π / 4 counterclockwise around the rotation center O relative to the display panel 2 at i=6.

[0110] With this structure, as shown in FIG. 28, the element packing ratio of the pixel Pix that lights up the display image T1 is the pixel Pix closest to the rotation center O (when the display element radius r is the minimum value r 10 ) to the position where a part of the pixel Pix overlaps between the adjacent display panels 2 (when the display element radius r is r 13 ), but the position where a part of the pixel Pix overlaps between adjacent display panels 2 (when the display element radius r is r 13 ) from the pixel Pix farthest from the rotation center O (when the display element radius r is the maximum value r 25 ), the element packing rate of the pixels Pix that light up the display image T1 decreases. 13 The size is, for example, 13 mm.

[0111] Therefore, as shown in FIG. 29, the pixel Pix closest to the rotation center O (when the display element radius r is the minimum value r 10) to the position where a part of the pixel Pix overlaps between the adjacent display panels 2 (when the display element radius r is r 13 ), the gradation value of pixel Pix in display image T1 is corrected to be constant.

[0112] In addition, the position where a part of the pixel Pix overlaps between the adjacent display panels 2 (when the display element radius r is r 13 ) from the pixel Pix farthest from the rotation center O (when the display element radius r is the maximum value r 25 ), the gradation value of the pixel Pix in the display image T1 is corrected to be larger.

[0113] This makes it possible to uniformly brighten the luminance of the display image T1 visually recognized by the observer OB.

[0114] Furthermore, other advantageous effects brought about by the aspects described in this embodiment that are obvious from the description in this specification or that can be appropriately thought of by a person skilled in the art are naturally understood to be brought about by the present disclosure. [Explanation of symbols]

[0115] 1, 1A, 1B Display System 100, 100A, 100B display device 2, 2A Display Panel 3 light source 4. Drive circuit 300 Rotating Device 500 Liquid crystal layers O Rotation Center AX Rotation Axis SL signal line GL scanline AA active area CL1, CL2 reference line

Claims

1. A display device having an active area in which a plurality of pixels are provided, the display device having a plurality of display panels for displaying an image in the active area; A rotation device that is provided so as to be able to rotate the display device, The pixel is surrounded by adjacent signal lines and adjacent scanning lines, The scanning lines extend along a first direction and are spaced apart in a second direction intersecting the first direction; The signal lines extend along a second direction and are arranged at intervals in the first direction, The plurality of display panels are arranged in a circumferential direction around the rotation center of the rotating device. Display system.

2. the display image displayed within the active area moves in a direction opposite to the direction in which the display panel rotates, at the same speed as the display panel. The display system of claim 1 .

3. The display image varies with time. The display system of claim 2 .

4. the display panel has a rectangular shape in a plan view, the display panel has a long side and a short side, The long sides extend radially from the center of rotation. The display system of claim 3.

5. the gradation value of the pixel in the display image increases from the pixel closest to the rotation center to the pixel farthest from the rotation center; 5. The display system of claim 4.

6. the gradation value of the pixel in the display image is constant from the pixel closest to the rotation center to the pixel farthest from the rotation center, The display panel has a sector shape in a plan view.

5. The display system of claim 4.

7. The number of the display panels is eight.

5. The display system of claim 4.

8. a gradation value of the pixel in the display image is constant from the pixel closest to the rotation center to a position where a portion of the pixel overlaps between adjacent display panels; the higher the pixel becomes the farthest from the rotation center from the position where the part of the pixel of the display panel overlaps, 8. The display system of claim 7.

9. the display panel displays a background when the pixel is in a first state, and displays a display image when the pixel is in a second state. A display system according to any one of claims 5, 6 and 8.

10. The display panel has a liquid crystal layer between two opposing substrates, The liquid crystal layer is a polymer dispersed liquid crystal.

10. The display system of claim 9.

Images