Image display method

Abstract

The present invention provides an image display method capable of reducing the influence of the destruction of the color mixing balance of the light emitted from the backlight source. The above-mentioned image display method comprises the following steps: a step (S2) of creating brightness setting data (D2) for each input image (IM) input to the controller (150) of the backlight source (110) and the liquid crystal panel (130); a step (S3) of creating grayscale setting data (D3); and a step (S4) of displaying the image on the liquid crystal panel. For a first input image (IM) among a plurality of input images, k ) Create brightness setting data (D2 k ) is performed, creating brightness data (D1) which converts the maximum grayscale of each area corresponding to each light-emitting area of ​​the backlight source in the first input image into brightness. k ), based on the brightness and brightness data of the second input image (IM k－1 ) creates brightness setting data (D2 k－1 ) brightness setting value (L2 k－1 (n, m)) and specifies the brightness setting value (L2 k (n, m)).

Description

Technical Field

[0001] Embodiments relate to an image display method. Background Art

[0002] It has long been known that there is an image display device comprising: a backlight having a plurality of light-emitting areas arranged in a matrix and a light source disposed in each light-emitting area; a liquid crystal panel disposed above the backlight and having a plurality of pixels; and a controller. If such an image display device is used, the controller can independently set the brightness of each light-emitting area according to the image to be displayed on the liquid crystal panel, and set the grayscale of each pixel of the liquid crystal panel according to the brightness of each light-emitting area. In this way, the contrast of the image displayed on the liquid crystal panel can be improved. Such a technology is called "local dimming".

[0003] A light source is provided in each light-emitting area of ​​the backlight source. Each light source includes a light-emitting element and a phosphor whose light-emitting peak wavelength is different from the light-emitting peak wavelength of the light-emitting element. Each light source mixes the light generated by the light-emitting element with the light generated by the phosphor, thereby being able to emit white light. However, when the controller changes the set value of the brightness of the light-emitting area, the light-emitting element responds faster than the phosphor, and thus the balance of the mixed colors of the light emitted from the light source is destroyed.

[0004] [Prior art literature]

[0005] [Patent Document]

[0006] Patent Document 1: International Publication No. 2019 / 124254 Summary of the invention

[0007] An object of the embodiment is to provide an image display method capable of reducing the influence of the destruction of the color mixing balance of light emitted from a backlight.

[0008] The image display method according to the embodiment comprises the following steps: for each of a plurality of continuous input images input to a controller of a backlight source having a plurality of light-emitting areas arranged in a matrix and a liquid crystal panel having a plurality of pixels, a step of creating brightness setting data that specifies a set value of brightness of each of the light-emitting areas of the backlight source; a step of creating grayscale setting data that specifies a set value of grayscale of each of the pixels of the liquid crystal panel based on the brightness setting data and each of the input images; a step of controlling the backlight source based on the brightness setting data and controlling the liquid crystal panel based on the grayscale setting data, thereby displaying an image on the liquid crystal panel. The step of creating the brightness setting data for a first input image among the plurality of input images comprises: a step of creating brightness data that converts the maximum grayscale of each area corresponding to each of the light-emitting areas of the backlight source in the first input image into brightness; a step of specifying the set value of brightness of each of the light-emitting areas based on the average value of the brightness of each of the areas of the brightness data and the set value of the brightness of each of the light-emitting areas of the brightness setting data created for a second input image immediately before the first input image among the plurality of input images.

[0009] The image display method of the embodiment comprises: a process of creating brightness setting data that specifies a set value of brightness of each of the light-emitting areas of the backlight source for each of a plurality of continuous input images input to a controller of a backlight source having a plurality of light-emitting areas arranged in a matrix and a liquid crystal panel having a plurality of pixels; a process of creating grayscale setting data that specifies a set value of grayscale of each of the pixels of the liquid crystal panel based on the brightness setting data and each of the input images; and a process of controlling the backlight source based on the brightness setting data and controlling the liquid crystal panel based on the grayscale setting data, thereby displaying an image on the liquid crystal panel. In the process of creating the brightness setting data for a first input image among the plurality of input images, the set value of brightness of each of the light-emitting areas of the backlight source is specified in such a manner that the brightness difference with the set value of brightness of the brightness setting data created for a second input image immediately before the first input image among the plurality of input images is within a threshold value.

[0010] The image display method of the embodiment comprises the following steps: for each of the continuous multiple input images input to the controller of the backlight source having multiple light-emitting areas arranged in a matrix and the liquid crystal panel having multiple pixels, the step of creating brightness setting data that specifies the setting value of the brightness of each of the light-emitting areas of the backlight source based on each of the input images; the step of creating grayscale setting data that specifies the setting value of the first grayscale of the first sub-pixel and the setting value of the second grayscale of the second sub-pixel contained in each of the pixels of the liquid crystal panel based on each corrected image obtained by correcting each of the input images according to the brightness setting data; the step of controlling the backlight source based on the brightness setting data, controlling the liquid crystal panel based on the grayscale setting data, and displaying an image on the liquid crystal panel. Each of the light-emitting areas of the backlight source can emit light including the first light and the second light having different light emission peak wavelengths. Each of the first sub-pixels can project the first light, and each of the second sub-pixels can project the second light. In the process of creating the above-mentioned grayscale setting data for the first input image among the above-mentioned multiple input images, the brightness difference between the above-mentioned brightness setting value of the above-mentioned brightness setting data of the above-mentioned first input image and the above-mentioned brightness setting value of the above-mentioned brightness setting data of the second input image directly in front of the above-mentioned first input image among the above-mentioned multiple input images is calculated for each of the above-mentioned light-emitting areas, and in the above-mentioned liquid crystal panel, for the above-mentioned pixel located directly above the above-mentioned light-emitting area where the above-mentioned brightness difference exceeds a threshold value, the above-mentioned corrected image is corrected based on the change in the ratio of the amount of light of the above-mentioned first light and the amount of light of the above-mentioned second light contained in the above-mentioned light emitted from the above-mentioned light-emitting area when the above-mentioned brightness setting value changes, so as to define the above-mentioned first grayscale setting value and the above-mentioned second grayscale setting value.

[0011] According to the embodiment, it is possible to provide an image display method capable of reducing the influence of the destruction of the color mixing balance of the mixed color light emitted from the backlight. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an exploded perspective view showing the image display device according to the first embodiment.

[0013] Figure 2 It is a top view showing a planar light source of a backlight of the image display device according to the first embodiment.

[0014] Figure 3 yes Figure 2 Cross-sectional view along line III-III.

[0015] Figure 4 It is a top view showing the liquid crystal panel of the image display device according to the first embodiment.

[0016] Figure 5 yes Figure 4 Cross-sectional view of the V-V line.

[0017] Figure 6 It is a block diagram showing the image display device according to the first embodiment.

[0018] Figure 7 This is a flowchart showing the image display method according to the first embodiment.

[0019] Figure 8 This is a schematic diagram showing the relationship between pixels of an input image input to a controller, a light emitting area of ​​a backlight, and pixels of a liquid crystal panel in the image display device according to the first embodiment.

[0020] Fig. 9 It is a schematic diagram showing a method of creating brightness setting data in the image display method according to the first embodiment.

[0021] Fig.10 It is a schematic diagram showing a method of creating grayscale setting data in the image display method according to the first embodiment.

[0022] Fig.11 FIG. 1 is a schematic diagram showing a method of creating brightness setting data in the image display method according to the second embodiment.

[0023] Fig. 12A FIG. 1 is a schematic diagram showing a method of creating brightness setting data in the image display method according to the second embodiment.

[0024] Fig. 12B FIG. 1 is a schematic diagram showing a method of creating brightness setting data in the image display method according to the second embodiment.

[0025] Fig.13 FIG. 1 is a schematic diagram showing a method of creating brightness setting data in the image display method according to the third embodiment.

[0026] Fig.14 It is a schematic diagram showing a method of creating grayscale setting data in the image display method according to the third embodiment.

[0027] Fig.15 It is a schematic diagram showing a method of creating grayscale setting data in the image display method according to the third embodiment.

[0028] Fig.16 It is a schematic diagram showing a modified example of the method of creating grayscale setting data.

[0029] Fig.17 It is a schematic diagram showing a modified example of the method of creating grayscale setting data.

[0030] Fig.18 It is a schematic diagram showing a modified example of the method of creating grayscale setting data.

[0031] Explanation of symbols

[0032] 100: Image display device

[0033] 110: Backlight

[0034] 110s: Luminous area

[0035] 111: Surface light source

[0036] 112: Substrate

[0037] 113: Light guide components

[0038] 113a: Light source configuration unit

[0039] 113b: Separation slot

[0040] 114: Light Source

[0041] 114a: Light-emitting element

[0042] 114b: Wavelength conversion component

[0043] 114c: Semiconductor stack

[0044] 114d, 114e: Electrode

[0045] 114f: Translucent parts

[0046] 114h: Wavelength conversion material

[0047] 114g, 114r: phosphor

[0048] 114i: Second light adjustment component

[0049] 114j: Third light adjustment component

[0050] 116: First light adjustment component

[0051] 117: Light reflecting parts

[0052] 118: Optical components

[0053] 120: Driver for backlight source

[0054] 130: LCD panel

[0055] 130p: Pixel

[0056] 130sb, 130sg, 130sr: Sub-pixel

[0057] 131: First polarizing plate

[0058] 132: First glass substrate

[0059] 133: Single electrode

[0060] 134: Liquid crystal layer

[0061] 135: Shared Electrode

[0062] 136: Color Filter

[0063] 136b, 136g, 136r: Filters

[0064] 136s: Filter set

[0065] 137: Second glass substrate

[0066] 138: Second polarizing plate

[0067] 140: Driver for LCD panel

[0068] 150: Controller

[0069] 151: Input interface

[0070] 152: Memory

[0071] 153: Processor

[0072] 153a: Brightness setting data creation unit

[0073] 153b: Grayscale setting data creation unit

[0074] 153c: Control Department

[0075] 154: Output interface

[0076] 900: External machine

[0077] D1k: Luminance data

[0078] D2, D2k, D2k-1D22k, D22k-1: Brightness setting data

[0079] D3, D3k, D32k, D32k-1, D33k: Brightness setting data

[0080] D4: Data indicating brightness distribution

[0081] Ef: correction formula

[0082] Efb, Efg, Efr: Output value (grayscale value of the corrected image)

[0083] Exb, Exg, Exr: Grayscale setting value

[0084] Gb, Gg, Gr: grayscale of the input image

[0085] Gmax: Maximum grayscale

[0086] IM, IMk, IMk-1, IMk-2: input image

[0087] IMak: Correcting Images

[0088] IMp: Pixel

[0089] IMs: Region

[0090] L(n,m): Brightness

[0091] L2k, L2k-1, L22k, L22k-1: Brightness setting value

[0092] Lb, Lg, Lr, Lw: light

[0093] SG1: Backlight control data

[0094] SG2: LCD panel control data

[0095] V(i, j): brightness value

[0096] K2, K1: correction coefficient

[0097] ΔL: Brightness difference

[0098] ΔLa: poor

[0099] ΔLdet: Threshold DETAILED DESCRIPTION

[0100] Hereinafter, each embodiment will be described with reference to the accompanying drawings. It should be noted that the accompanying drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the ratio of the size between the parts, etc. are not necessarily the same as in reality. In addition, when representing the same part, the size and ratio of each other may also be represented differently according to the accompanying drawings. In addition, in this specification and each figure, the same elements as the elements described in the drawings are attached with the same symbols, and the detailed description is appropriately omitted.

[0101] In addition, in order to facilitate the understanding of the description, the configuration and structure of each part of the image display device are described using the XYZ orthogonal coordinate system. The X-axis, Y-axis, and Z-axis are orthogonal to each other. In addition, the direction in which the X-axis extends is the "X direction", the direction in which the Y-axis extends is the "Y direction", and the direction in which the Z-axis extends is the "Z direction". In addition, in order to facilitate the understanding of the description, the Z direction is taken as the top and the opposite direction is taken as the bottom, but these directions have nothing to do with the direction of gravity. In addition, in order to facilitate the understanding of the description, in each figure, in the direction in which the X-axis extends, the direction of the arrow is taken as the "+X direction", and the opposite direction is taken as the "-X direction". Similarly, in the direction in which the Y-axis extends, the direction of the arrow is taken as the "+Y direction", and the opposite direction is taken as the "-Y direction".

[0102] <First embodiment>

[0103] First, the first embodiment will be described.

[0104] Figure 1 It is an exploded perspective view showing the image display device according to the present embodiment.

[0105] The image display device 100 of this embodiment is, for example, a liquid crystal module (LCM) used in a display of a device such as a television, a personal computer, or a game console. The image display device 100 includes a backlight 110, a driver 120 for the backlight, a liquid crystal panel 130, a driver 140 for the liquid crystal panel, and a controller 150. The following describes each component of the image display device 100. It should be noted that Figure 1 In the drawings, for easy understanding of the description, components are connected by solid lines, which means that the components are electrically connected to each other.

[0106] The backlight source 110 may be driven by local dimming. The backlight source 110 includes a planar light source 111 and an optical component 118 disposed on the planar light source 111.

[0107] The optical component 118 is not particularly limited, and may be, for example, a sheet, film, or plate having a light adjustment function such as a light diffusion function. In this embodiment, the number of optical components 118 provided in the backlight source 110 is one. However, the number of optical components provided in the backlight source may be two or more.

[0108] Figure 2 It is a top view showing a planar light source of a backlight of the image display device according to the present embodiment.

[0109] Figure 3 yes Figure 2 Cross-sectional view along line III-III.

[0110] like Figure 2 and Figure 3 As shown, in this embodiment, the planar light source 111 includes a substrate 112 , a light reflective sheet 112 s , a light guide member 113 , a plurality of light sources 114 , a light transmissive member 115 , a first light adjustment member 116 , and a light reflecting member 117 .

[0111] The substrate 112 is a wiring substrate having an insulating member and a plurality of wirings provided on the insulating member. The top view shape of the substrate 112 in this embodiment is as follows: Figure 2 The substrate 112 is shown as a substantially rectangular shape. However, the shape of the substrate is not limited to the above-mentioned shape. The upper and lower surfaces of the substrate 112 are flat surfaces, and the X direction and the Y direction are substantially parallel.

[0112] like Figure 3 As shown, the light reflective sheet 112s is disposed on the substrate 112. In this embodiment, the light reflective sheet 112s has a first adhesive layer, a light reflective layer disposed on the first adhesive layer, and a second adhesive layer disposed on the light reflective layer. The light reflective sheet 112s is attached to the substrate 112 via the first adhesive layer.

[0113] The light-guiding component 113 is disposed on the light-reflecting sheet 112s. At least a portion of the lower surface of the light-guiding component 113 is attached to the light-reflecting sheet 112s via a second adhesive layer. The shape of the light-guiding component 113 is plate-shaped in the present embodiment. The thickness of the light-guiding component 113 is preferably 200 μm to 800 μm, for example. The light-guiding component 113 may be composed of a single layer in the thickness direction, or may be composed of a laminate of a plurality of layers. The shape of the light-guiding component 113 when viewed from above is as follows in the present embodiment: Figure 2 However, the shape of the light guide member is not limited to the above-mentioned shape.

[0114] As a material used for such a light guide member 113, for example, a thermoplastic resin such as acrylic, polycarbonate, cyclic polyolefin, polyethylene terephthalate, or polyester, a thermosetting resin such as epoxy or silicone, or glass can be used.

[0115] The light guide member 113 is provided with a plurality of light source configuration parts 113a. The plurality of light source configuration parts 113a are arranged in a matrix shape when viewed from above. Figure 3 As shown in FIG. 1 , each light source placement portion 113 a is a through hole that penetrates the light guide member 113 in the Z direction. However, the light source placement portion may be a bottomed recessed portion provided on the lower surface of the light guide member.

[0116] Each light source 114 is disposed in each light source disposition part 113a. Figure 2However, it is not necessary to configure a light guide component in a planar light source. For example, a planar light source may not be configured with a light guide component, and a plurality of light sources may be simply arranged in a matrix on a substrate. It should be noted that the light source configuration portion when no light guide component is configured is the portion of the substrate where the light source is configured.

[0117] Each light source 114 may be a single light emitting element, or may include a light emitting device such as a wavelength conversion component in the light emitting element. Figure 3 As shown, each light source 114 includes a light emitting element 114a, a wavelength conversion component 114b, and a second light adjustment component 114i and a third light adjustment component 114j.

[0118] The light emitting element 114a is, for example, an LED (Light Emitting Diode), and includes a semiconductor stack 114c and a pair of electrodes 114d and 114e that electrically connect the semiconductor stack 114c to the wiring of the substrate 112. A through hole is provided in the portion of the light reflective sheet 112s directly below each electrode 114d and 114e. A conductive member 112m that electrically connects each electrode 114d and 114e to the substrate 112 is disposed in the through hole.

[0119] The wavelength conversion member 114b includes a translucent member 114f covering the upper surface and side surfaces of the semiconductor stack 114c, and a wavelength conversion material 114h disposed in the translucent member 114f to convert the wavelength of light emitted from the semiconductor stack 114c into a different wavelength. The wavelength conversion material 114h is, for example, a phosphor.

[0120] In this embodiment, the light emitting element 114a emits blue light Lb. On the other hand, the wavelength conversion member 114b includes, for example, a CASN-based phosphor (e.g., CaAlSiN 3 :Eu), quantum dot phosphors (e.g., AgInS 2 、AgInSe 2 ), KSF-based phosphors (e.g., K 2 SiF 6 :Mn) or KSAF-based phosphors (e.g., K 2 (Si,Al)F 6 : Mn, more specifically, including K 2 Si 0.99 Al 0.01 F 5.99 : Mn) or the like that emits red light Lr (hereinafter referred to as the red phosphor 114r), or a phosphor having a perovskite structure (for example, CsPb(F, Cl, Br, I) 3), quantum dot phosphors (e.g., CdSe, InP), β-sialon phosphors (e.g., (Si, Al) 3 (O, N) 4 :Eu) or LAG-based phosphors (e.g., Lu 3 (Al, Ga) 5 O 12 :Ce) and other fluorescent bodies 114g (hereinafter referred to as green fluorescent bodies 114g) that emit green light Lg. Therefore, each light source 114 can emit light Lw containing blue light Lb, green light Lg and red light Lr with different emission peak wavelengths. The ratio of the amount of blue light Lb, the amount of green light Lg, and the amount of red light Lr contained in the light Lw is set according to the ratio of the color of the light Lw to white. It should be noted that the wavelength conversion component 114b can be replaced by a translucent component that does not contain a fluorescent body. In this case, for example, by arranging a fluorescent body sheet containing a red fluorescent body and a green fluorescent body on the light guide component, or arranging a fluorescent body sheet containing a red fluorescent body and a fluorescent body sheet containing a green fluorescent body on the light guide component respectively, the same white light can be obtained.

[0121] In addition, the KSAF-based phosphor may have a composition represented by the following formula (I).

[0122] M 2 [Si p Al q Mn r F s ](I)

[0123] In formula (I), M represents an alkali metal and may contain at least K. Mn may be a tetravalent Mn ion. p, q, r and s may satisfy 0.9≤p+q+r≤1.1, 0<q≤0.1, 0<r≤0.2, and 5.9≤s≤6.1. Preferably, 0.95≤p+q+r≤1.05 or 0.97≤p+q+r≤1.03, 0<q≤0.03, 0.002≤q≤0.02 or 0.003≤q≤0.015, 0.005≤r≤0.15, 0.01≤r≤0.12 or 0.015≤r≤0.1, 5.92≤s≤6.05 or 5.95≤s≤6.025. For example, K 2 [Si 0.946 Al 0.005 Mn 0.049 F 5.995 ], K 2 [Si 0.942 Al 0.008 Mn 0.050 F 5.992 ], K 2 [Si 0.939 Al0.014 Mn 0.047 F 5.986 Based on such a KSAF-based phosphor, red light emission with high brightness and a narrow half-value width of the emission peak wavelength can be obtained.

[0124] The second light adjustment component 114i is arranged on the upper surface of the wavelength conversion component 114b, and can control the amount and direction of light emitted from the upper surface of the wavelength conversion component 114b. In addition, the third light adjustment component 114j is arranged on the lower surface of the light emitting element 114a and the lower surface of the wavelength conversion component 114b in a manner that the lower surfaces of the electrodes 114d and 114e are exposed. The third light adjustment component 114j can be controlled to reflect light toward the lower surface of the wavelength conversion component 114b and emit it from the upper surface and side of the wavelength conversion component 114b. Such a second light adjustment component 114i and a third light adjustment component 114j can be respectively composed of a translucent resin, a light diffusing agent contained in the translucent resin, and the like. The translucent resin is, for example, a silicone resin, an epoxy resin, or an acrylic resin. The light diffusing agent, for example, can be TiO 2 、SiO 2 , Nb 2 O 5 、BaTiO 3 、 2 O 5 、Zr 2 O 3 , Y 2 O 3 、Al 2 O 3 、ZnO、MgO、BaSO 4 Or particles such as glass, etc. In addition, the second light adjustment member 114i may be made of a metal member such as Al or Ag, so that the brightness directly above the light source 114 is not too high.

[0125] A light-transmitting member 115 is disposed in the light source arrangement portion 113a. The light-transmitting member 115 covers the light source 114. A first light-adjusting member 116 is disposed on the light-transmitting member 115. The first light-adjusting member 116 can reflect a portion of the light incident from the light-transmitting member 115 and transmit the other portion so that the brightness directly above the light source 114 is not too high. Such a first light-adjusting member 116 can use the same member as the second light-adjusting member 114i or the third light-adjusting member 114j.

[0126] In addition, the light guide member 113 is provided with a partition groove 113b in a manner that surrounds each light source configuration portion 113a when viewed from above. The partition groove 113b extends in a lattice shape in the X direction and the Y direction. The partition groove 113b penetrates the light guide member 113 in the Z direction. However, the partition groove may be a recessed portion provided on the upper surface or the lower surface of the light guide member. In addition, the partition groove may not be provided on the light guide member.

[0127] A light reflecting member 117 is disposed in the dividing groove 113b. As the light reflecting member 117, for example, a light-transmitting resin containing a light diffusing agent can be used. As the light diffusing agent, for example, TiO 2 、SiO 2 , Nb 2 O 5 、BaTiO 3 、 2 O 5 、Zr 2 O 3 , ZnO, Y 2 O 3 、Al 2 O 3 、MgO、BaSO 4 Or glass particles. As the light-transmitting resin, for example, silicone resin, epoxy resin or acrylic resin can be cited. In addition, as the light-reflecting component 117, for example, a metal component such as Al or Ag can be used. The light-reflecting component 117 covers a part of the side surface of the separation groove 113b in a layered manner. However, the light-reflecting component can be configured to fill the entire separation groove. In addition, the light-reflecting component may not be configured in the separation groove.

[0128] In this embodiment, the outputs of the plurality of light sources 114 can be individually controlled by a backlight driver 120. Here, "capable of controlling the output" means that the light can be switched between on and off, and the brightness in the on state can be adjusted. For example, the planar light source can be configured to control the output of each light source, or can be configured to control the output of each light source group by arranging a plurality of light source groups in a matrix.

[0129] In this specification, each area when the planar light source is divided into each area including a light source or a light source group whose output is individually controlled when viewed from above is referred to as a "luminous area". In other words, the luminous area refers to the area in the backlight source where the brightness is the smallest by local dimming. Therefore, in this embodiment, when the planar light source 111 is divided into a grid shape like the dividing grooves 113b, each area corresponds to the luminous area 110s.

[0130] Each light emitting region 110s is rectangular in shape. In the present embodiment, one light source 114 is provided in one light emitting region 110s. Furthermore, the output of the plurality of light sources 114 is individually controlled by the backlight driver 120, and the brightness of the plurality of light emitting regions 110s is individually controlled. It should be noted that, as described above, when the output is controlled by a plurality of light source groups, one light source group, i.e., a plurality of light sources, is arranged in one light emitting region, and the plurality of light sources are simultaneously lit or extinguished.

[0131] The plurality of light-emitting regions 110s are arranged in a matrix shape when viewed from above. Hereinafter, for a matrix structure such as the plurality of light-emitting regions 110s, a group of elements such as rows and columns of light-emitting regions 110s arranged in parallel in the X direction is referred to as a "row", and a group of elements such as rows and columns of light-emitting regions 110s arranged in parallel in the Y direction is referred to as a "column". For example, Figure 2 As shown in , the row located most in the +Y direction (the row located most on the left) is regarded as the "first row", and the row located most in the -Y direction (the row located most on the right) is regarded as the "last row". Figure 2 As shown, the column located most in the -X direction (the column located at the bottom) is regarded as the "first column", and the column located most in the +X direction (the column located at the top) is regarded as the "last column". The plurality of light-emitting regions 110s are arranged to form N1 rows and M1 columns. Here, N1 and M1 are arbitrary integers, Figure 2 , an example in which N1 is 8 and M1 is 16 is shown.

[0132] like Figure 1 As shown, the backlight driver 120 is connected to the substrate 112 and the controller 150. The backlight driver 120 includes a driving circuit for the plurality of light sources 114. The backlight driver 120 adjusts the brightness of each light emitting region 110s based on the backlight control data SG1 received from the controller 150.

[0133] Figure 4 It is a top view showing a liquid crystal panel of the image display device according to this embodiment.

[0134] Figure 5 yes Figure 4 Cross-sectional view of the V-V line.

[0135] A liquid crystal panel 130 is disposed on the backlight source 110. Figure 4 As shown in FIG. 1 , the shape of the liquid crystal panel 130 when viewed from above is a substantially rectangular shape in this embodiment. Figure 5 As shown, in this embodiment, the liquid crystal panel 130 includes a first polarizing plate 131 , a first glass substrate 132 , a plurality of individual electrodes 133 , a liquid crystal layer 134 , a common electrode 135 , a color filter 136 , a second glass substrate 137 , and a second polarizing plate 138 .

[0136] A first glass substrate 132 is disposed on the first polarizing plate 131. A plurality of individual electrodes 133 are disposed on the first glass substrate 132. The plurality of individual electrodes 133 are arranged in a matrix in the X direction and the Y direction. A liquid crystal layer 134 is disposed on the plurality of individual electrodes 133. A common electrode 135 is disposed on the liquid crystal layer 134.

[0137] A color filter 136 is disposed on the common electrode 135. In the present embodiment, the color filter 136 includes a blue filter 136b capable of projecting blue light Lb in the light Lw emitted from the light source 114, a green filter 136g capable of projecting green light Lg in the light Lw, and a red filter 136r capable of projecting red light Lr in the light Lw. In the present embodiment, a filter group 136s including a blue filter 136b, a green filter 136g, and a red filter 136r is arranged in a matrix in the X direction and the Y direction. Moreover, in each filter group 136s, a blue filter 136b, a green filter 136g, and a red filter 136r are arranged in sequence in the X direction. Each filter 136b, 136g, and 136r is disposed at a position overlapping with each individual electrode 133 when viewed from above.

[0138] A second glass substrate 137 is disposed on the color filter 136. A second polarizing plate 138 is disposed on the second glass substrate 137.

[0139] However, the specific structure of the liquid crystal panel is not particularly limited to the above-mentioned structure.

[0140] Hereinafter, in the liquid crystal panel 130, a portion consisting of one filter group 136s, a portion located directly above it, and a portion located directly below it is referred to as a "pixel 130p". Figure 4 As shown, in this embodiment, the liquid crystal panel 130 has a plurality of pixels 130 p arranged in a matrix in the X direction and the Y direction.

[0141] In addition, hereinafter, in one pixel 130p, a portion consisting of a blue filter 136b, a portion located directly above the blue filter 136b, and a portion located directly below the blue filter 136b will be referred to as a "blue sub-pixel 130sb". The blue sub-pixel 130sb can project blue light Lb. Similarly, in one pixel 130p, a portion consisting of a green filter 136g, a portion located directly above the blue filter 136g, and a portion located directly below the blue filter 136g will be referred to as a "green sub-pixel 130sg". The green sub-pixel 130sg can project green light Lg. Similarly, in one pixel 130p, a portion consisting of a red filter 136r, a portion located directly above the blue filter 136r, and a portion located directly below the blue filter 136r will be referred to as a "red sub-pixel 130sr". The red sub-pixel 130sr can project red light Lr.

[0142] The driver 140 for the liquid crystal panel adjusts the voltage applied between the common electrode 135 and each individual electrode 133, thereby adjusting the light transmittance of each portion of the liquid crystal layer 134 located directly above each individual electrode 133. In this way, the grayscale of each pixel 130p of the liquid crystal panel 130, more specifically, the grayscale of each sub-pixel 130sb, 130sg, and 130sr is adjusted.

[0143] The plurality of pixels 130p are arranged in a manner to form N2 rows and M2 columns. Here, N2 and M2 are arbitrary integers, N2>N1, M2>M1. In a top view, a plurality of pixels 130p are arranged in each light emitting region 110s. It should be noted that Figure 4 , an example in which one light-emitting region 110s corresponds to four pixels 130p is shown. The number of pixels 130p corresponding to one light-emitting region 110s may be less than three or may be more than five.

[0144] like Figure 1 As shown, the liquid crystal panel driver 140 is connected to the liquid crystal panel 130 and the controller 150. The liquid crystal panel driver 140 includes a driving circuit for the liquid crystal panel 130. The liquid crystal panel driver 140 adjusts the grayscale of each pixel 130p based on the liquid crystal panel control data SG2 received from the controller 150.

[0145] Figure 6 This is a block diagram showing the image display device according to this embodiment.

[0146] In this embodiment, the controller 150 includes an input interface 151, a memory 152, a processor 153 such as a CPU (central processing unit), and an output interface 154. These are connected to each other via a bus.

[0147] The input interface 151 is connected to an external device 900 such as a tuner, a personal computer, or a game console. The input interface 151 includes, for example, a connection terminal for the external device 900 such as an HDMI (registered trademark) terminal. The external device 900 inputs an input image IM to the controller 150 via the input interface 151.

[0148] The memory 152 includes, for example, ROM (Read-Only Memory) and RAM (Random-Access Memory), etc. The memory 152 stores various programs, various parameters, and various data for displaying images on the liquid crystal panel.

[0149] The processor 153 reads the program stored in the memory 152, processes the input image IM, specifies the setting value of the brightness of each light-emitting area 110s of the backlight source 110 and the setting value of the grayscale of each pixel 130p of the liquid crystal panel 130, and controls the backlight source 110 and the liquid crystal panel 130 based on these setting values. Thus, an image corresponding to the input image IM is displayed on the liquid crystal panel 130. The processor 153 includes a brightness setting data creation unit 153a, a grayscale setting data creation unit 153b, and a control unit 153c.

[0150] The output interface 154 is connected to the backlight driver 120. The output interface includes a connection terminal of the liquid crystal panel driver 140 such as an HDMI (registered trademark) terminal, and is connected to the liquid crystal panel driver 140. The backlight driver 120 obtains the backlight control data SG1 via the output interface 154. The liquid crystal driver 140 obtains the liquid crystal panel control data SG2 via the output interface 154.

[0151] Next, an image display method using the image display device 100 of this embodiment will be described. In addition, the functions of the brightness setting data creation unit 153a, the grayscale setting data creation unit 153b, and the control unit 153c as the processor 153 will also be described.

[0152] Figure 7 : is a flowchart showing the image display method according to this embodiment.

[0153] In this embodiment, a plurality of continuous input images IM are input to the controller 150. The image display method of this embodiment includes an input image IM acquisition step S1, a brightness setting data D2 creation step S2, a grayscale setting data D3 creation step S3, and an image display step S4 for each of the plurality of input images IM.

[0154] Each step is described in detail below. k A method of displaying an image corresponding to the (first input image) on the liquid crystal panel 130 will be described. Here, k is an arbitrary natural number.

[0155] First, the input image IM k The acquisition step S1 is described below.

[0156] First, if Figure 6 As shown, the input interface 151 of the controller 150 obtains the input image IM from the external device 900. k The input image IM is obtained k Stored in memory 152.

[0157] Figure 8This is a schematic diagram showing the relationship between pixels of an input image of an input controller, a light emitting area of ​​a backlight source, and pixels of a liquid crystal panel in the image display device of this embodiment.

[0158] Each input image IM has a plurality of pixels IMp arranged in a matrix. In the following, for easy understanding, in data in which elements such as pixels IMp are arranged in a matrix like the input image IM, an xy orthogonal coordinate system is used to represent the arrangement direction of the elements. In addition, in the direction in which the x-axis extends, the direction of the arrow is the "+x direction", and the opposite direction is the "-x direction". Similarly, in the direction in which the y-axis extends, the direction of the arrow is the "+y direction", and the opposite direction is the "-y direction". In addition, in the following, the group of elements of the matrix arranged in the x-direction is referred to as a "row", and the group of elements of the matrix arranged in the y-direction is referred to as a "column". For example, Figure 8 As shown in , the row located in the most +y direction (the row located on the leftmost side) is the "first row", and the row located in the most -y direction (the row located on the rightmost side) is the "last row". Figure 8 As shown, the column located most in the -x direction (the column located at the bottom) is the "first column", and the column located most in the +x direction (the column located at the top) is the "last column".

[0159] In addition, for ease of understanding, the following describes an example in which, for example, a pixel Imp of the input image IM corresponds to a pixel 130p of the liquid crystal panel 130. That is, in the present embodiment, a plurality of pixels IMp are arranged to form N2 rows and to form M2 columns. Moreover, in the input image IM, a plurality of pixels IMp are included in an area IMs corresponding to a light-emitting area 110s of the backlight source 110. However, the correspondence between the pixels of the input image and the pixels of the liquid crystal panel is not one-to-one. In this case, the processor 153 of the controller 150 performs pre-processing on the input image so that the pixels of the input image correspond one-to-one to the pixels of the liquid crystal panel, and then performs the following processing.

[0160] Grayscale is set for each pixel Imp. In the present embodiment, the input image IM is a color image. Therefore, the blue grayscale Gb(i, j), the green grayscale Gg(i, j) and the red grayscale Gr(i, j) are set in the pixel Imp located in the i-th row and the j-th column. Here, i is an arbitrary integer from 1 to N2, and j is an arbitrary integer from 1 to M2. Each grayscale Gb(i, j), Gg(i, j), and Gr(i, j) is a number from 0 to 255 when represented by 8 bits, for example.

[0161] Next, the creation step S2 of the brightness setting data D2 will be described.

[0162] Fig. 9Schematic diagram showing a method of creating brightness setting data in the image display method according to the present embodiment.

[0163] Next, we will also perform the k-th input image IM k The created brightness setting data D2 is referred to as brightness setting data D2 k The brightness setting data creating unit 153a creates brightness setting data D2 defining the setting value of the brightness of each light emitting region 110s of the backlight 110. k .

[0164] Next, the brightness setting data D2 k The specific method of creating the method is described below.

[0165] First, the brightness setting data creating unit 153a creates a k The maximum grayscale Gmax of each region IMs corresponding to each luminous region 110s is converted into the brightness L k Brightness data D1 of (n, m) k .

[0166] Specifically, the brightness setting data creation unit 153a first extracts the region IMs corresponding to the light-emitting region 110s located at the nth row and the mth column. Next, the brightness setting data creation unit 153a sets the maximum value of the blue grayscale Gb(i, j), the green grayscale Gg(i, j), and the red grayscale Gr(i, j) of all the pixels IMp included in the region IMs as the maximum grayscale Gmax of the region IMs. Next, the brightness setting data creation unit 153a converts the maximum grayscale Gmax into a brightness L k Next, the brightness setting data creating unit 153a sets the brightness L k (n, m) is set as brightness data D1 k The element e1 located at the nth row and the mth column k Here, n is an arbitrary integer between 1 and N1, and m is an arbitrary integer between 1 and M1.

[0167] The brightness setting data creating unit 153a performs this process on all the regions IMs.

[0168] The brightness data D1 obtained in this way k The data is in a matrix with N1 rows and M1 columns. k The element e1 k The value of (n, m) is the value obtained by converting the maximum grayscale Gmax of the region IMs located at the nth row and the mth column into the brightness L.

[0169] The brightness setting data creating unit 153a generates the brightness data D1 k Stored in memory 152.

[0170] When the setting value of the brightness of the light-emitting area 110s of the controller 150 is changed in order to change the image displayed on the liquid crystal panel 130, the amount of light from the light-emitting element 114a changes before the amount of light from the green phosphor 114g and the red phosphor 114r. In addition, the response speeds of the green phosphor 114g and the red phosphor 114r are sometimes different from each other. For example, when the response speed of the red phosphor 114r is slower than the response speed of the green phosphor 114g, when the controller 150 increases the setting value of the brightness of the light-emitting area 110s, the amount of light from the light-emitting element 114a and the green phosphor 114g increases before the amount of light from the red phosphor 114r, and a greenish blue (cyan) light Lw is emitted from the light source 114 during the increase in brightness. In addition, when the controller 150 lowers the set value of the brightness of the light-emitting area 110s, the amount of light from the red phosphor 114r decreases after the amount of light from the light-emitting element 114a and the green phosphor 114g, so that light Lw with a reddish color is emitted from the light source 114 as the brightness decreases.

[0171] In this way, when the set value of the brightness of the light emitting area 110s is changed, the ratio of the amount of blue light Lb, the amount of green light Lg, and the amount of red light Lr contained in the light Lw changes. As a result, the balance of the mixed colors of the light Lw is destroyed. Such a destruction of the balance of the mixed colors of the light Lw becomes more significant as the amount of change in the set value of the brightness of the light emitting area 110s increases. In the past, the controller based on the input image IM k Create brightness data D1 k , and controls the backlight source 110. Therefore, the amount of change in the brightness of the light emitting area 110s is large enough to significantly disrupt the color mixing balance of the light Lw.

[0172] In contrast, in the image display method of this embodiment, based on the brightness data D1 k Brightness L k (n, m) and for the k-1th input image IM k－1 Created brightness setting data D2 k－1 The setting value L2 of the brightness of the (second input image) k－1 The average value of (n, n) specifies the input image IM k Brightness setting data D2 k The brightness setting value L2 k (n, m).

[0173] Specifically, first, the brightness setting data creating unit 153a calculates the brightness data D1k The element e1 at row n and column m in k The brightness L of (n, m) k (n, m) and brightness setting data D2 k－1 The element e2 located at the nth row and mth column k－1 The setting value L2 of the brightness of (n, m) k－1 Next, the brightness setting data creating unit 153a sets the average value as the brightness setting data D2 k The element e2 located at the nth row and mth column k The value of (n, m), that is, the set value L2 of the brightness of the light-emitting region 110s located in the nth row and the mth column k (n, m).

[0174] The brightness setting data creating unit 153 a performs this process on all the light emitting areas 110 s of the backlight 110 .

[0175] The brightness setting data D2 thus obtained k The data is in a matrix form with N1 rows and M1 columns. The brightness setting data D2 located in the nth row and the mth column k Element e2 k The value of (n, m) is the set value L2 of the brightness of the light emitting area 110s located in the nth row and the mth column in the backlight source 110 k (n, m).

[0176] The brightness setting data creating unit 153a generates the brightness setting data D2 k Stored in memory 152.

[0177] It should be noted that for the k-1th input image IM k－1 Created brightness setting data D2 k－1 The brightness setting data creating unit 153a creates the image IM in advance and stores it in the memory 152. k－2 In the case of k Create brightness setting data D2 in the same way as k－1 In addition, there is no k-1th preceding input image IM k－2 In the case of k－1 In the case of the first input image, the brightness setting data creating unit 153a may generate the brightness setting data based on the input image IM k－1 The created brightness data is set as brightness setting data D2 k－1 .

[0178] Next, the creation step S3 of the grayscale setting data D3 will be described.

[0179] Fig.10 This is a schematic diagram showing a method of creating grayscale setting data in the image display method according to the present embodiment.

[0180] Hereinafter, the grayscale setting data D3 created for the k-th input image IMk will be referred to as “grayscale setting data D3 k The grayscale setting data creating unit 153b is based on the input image IM k and brightness setting data D2 k The grayscale setting data D3 that specifies the grayscale setting value of each pixel 130p of the liquid crystal panel 130 is created. k .

[0181] Next, the grayscale setting data D3 k A specific example of the creation method is described below.

[0182] In this embodiment, the memory 152 stores in advance data D4 indicating the brightness distribution at each position on the XY plane when the light source 114 in one light emitting region 110s is turned on. Fig.10 In the figure, ON represents the light emitting area 110s where the light source 114 is on, and OFF represents the light emitting area 110s where the light source 114 is off.

[0183] In step S2, the set value of the brightness of each light emitting area 110s of the backlight source 110 is specified. However, in reality, as shown in FIG. Fig.10 As shown in the data D4 of the brightness distribution, even in one light-emitting area 110s, the brightness may be different at each position on the XY plane. In addition, when the light source 114 in one light-emitting area 110s is turned on, the light may spread to the surrounding light-emitting areas 110s.

[0184] Therefore, first, the grayscale setting data creating unit 153b generates the brightness setting data D2 k The luminance value V(i, j) directly below the pixel 130 p located at the i-th row and the j-th column of the liquid crystal panel 130 is inferred from the luminance distribution data D4.

[0185] Specifically, the grayscale setting data creating unit 153b generates the grayscale setting data based on the brightness setting data D2 k The element e2 corresponding to the light emitting region 110s located directly below the pixel 130p is kThe luminance value V1(i, j) directly below the pixel 130p when only the light source 114 in the light-emitting area 110s is lit is estimated by using the value of (n, m) (the set value of luminance) and the data D4 indicating the luminance distribution. k The element e2 corresponding to the light emitting area 110s around the light emitting area 110s k The value of (s, t) and the data D4 indicating the brightness distribution are used to estimate the brightness value V2(i, j) directly below the pixel 130p when only the light source 114 in the surrounding light-emitting area 110s is lit. Furthermore, the value obtained by adding these brightness values ​​V1(i, j) and V2(i, j) is estimated as the brightness value V(i, j) directly below the pixel 130p. Thus, the grayscale setting data creation unit 153b combines the brightness distribution in one light-emitting area 110s and the light leakage from the surrounding light-emitting areas 110s, and can estimate the brightness value V(i, j) directly below the pixel 130p.

[0186] Next, the grayscale setting data creation unit 153b compares the estimated brightness value V(i, j) with the input image IM k The blue grayscale Gb(i, j) of the pixel IMp corresponding to the pixel 130p is substituted into the correction formula Ef. The correction formula Ef converts the brightness into grayscale based on gamma correction, and uses the converted grayscale to correct the input image IMp. k Correction formula. The grayscale setting data creation unit 153b substitutes the blue grayscale Gb(i, j) into the correction formula Ef, and sets the output value Efb(i, j) of the correction formula Ef as the setting value of the blue grayscale of the pixel 130p. The same process is performed on the green grayscale Gg(i, j), and the output value Efg(i, j) of the correction formula Ef obtained thereby is set as the setting value of the green grayscale of the pixel 130p. The grayscale setting data creation unit 153b also performs the same process on the red grayscale Gr(i, j), and the output value Efr(i, j) of the correction formula Ef obtained thereby is set as the setting value of the red grayscale of the pixel 130p. That is, the grayscale setting data creation unit 153b sets the output values ​​Efb(i, j), Efg(i, j), and Efr(i, j) as the grayscale setting data D3 k The element e3 located at the i-th row and j-th column k The value of (i, j).

[0187] The grayscale setting data creation unit 153b performs this process on each pixel 130p(i, j) of the liquid crystal panel 130. In this way, the grayscale setting data D3 is created. k Thus, in this embodiment, the brightness setting data D2 k Correct the input image IMk Thus, the grayscale setting data D3 is created.

[0188] The grayscale setting data D3 obtained in this way k The element e3 located at the i-th row and the j-th column in the grayscale setting data D3 is a matrix of N2 rows and M2 columns. k The three values ​​of (i, j) Efb(i, j), Efg(i, j), and Efr(i, j) correspond to the blue grayscale setting value, the green grayscale setting value, and the red grayscale setting value of the pixel 130p located in the i-th row and j-th column of the liquid crystal panel 130, respectively.

[0189] The grayscale setting data creating unit 153b generates the grayscale setting data D3 k Stored in memory 152.

[0190] The above describes an example of a method for creating grayscale setting data D3, but the method for creating grayscale setting data is not limited to the above method. For example, after the brightness values ​​directly below all pixels of the liquid crystal panel are estimated, each brightness value is substituted into the conversion formula.

[0191] Next, the image display step S4 will be described.

[0192] The control unit 153c controls the brightness setting data D2 based on the brightness setting data D2. k Control the backlight source 110 based on the grayscale setting data D3 k The liquid crystal panel 130 is controlled to display an image on the liquid crystal panel 130 .

[0193] Specifically, if Figure 6 As shown, the control unit 153c sends the backlight control data SG1 created based on the brightness setting data D2 to the backlight driver 120 via the output interface 154. The backlight control data SG1 is not particularly limited as long as it is data that can control the driving of the backlight driver 120, for example, it is data in the form of PWM (Pulse Width Modulation). The backlight driver 120 controls the output of each light source 114 based on the backlight control data SG1.

[0194] In addition, the control unit 153c outputs the grayscale setting data D3 to the output interface 154. k The liquid crystal panel control data SG2 is sent to the driver 140 for the liquid crystal panel. However, the liquid crystal panel control data SG2 may be the grayscale setting data D3 kThe data is converted into a format capable of controlling the driving of the liquid crystal panel driver 140. The liquid crystal panel driver 140 controls the light transmittance of each pixel 130p, more specifically, each sub-pixel 130sb, 130sg, 130sr, based on the liquid crystal panel control data SG2.

[0195] The brightness setting data D2 is used k The timing of switching to the backlight control data SG1 is not particularly limited as long as it is after step S2. k When switching to the liquid crystal panel control data SG2, the timing of switching is not particularly limited as long as it is after step S3.

[0196] Next, the effects of this embodiment will be described.

[0197] In the image display method of this embodiment, an input image IM among a plurality of input images IM is k Create brightness setting data D2 k Step S2 has the following steps: creating an input image IM k The maximum grayscale Gmax of each area IMs corresponding to each light emitting area 110s of the backlight source 110 is converted into the brightness L k Brightness data D1 of (n, m) k Based on the brightness data D1 k The brightness L of each area IMs k (n, m) and the input image IM in the plurality of input images IM k The previous input image IM k－1 Created brightness setting data D2 k－1 The setting value L2 of the brightness of each light emitting area 110s k－1 The average value of (n, m) specifies the brightness setting data D2 of each light emitting area 110s. k The brightness setting value L2 k (n, m) process.

[0198] Therefore, it is possible to suppress the input image IM k The setting value L2 of the brightness of each light emitting area 110s k with the input image IM immediately preceding it k－1 The setting value L2 of the brightness of each light emitting area 110s k－1 The brightness difference becomes larger. Thus, it is possible to suppress the brightness change of each light emitting area 110s when switching the image displayed by the liquid crystal panel 130. Based on the above, it is possible to provide an image display method that can reduce the influence of the destruction of the color mixing balance of the light Lw emitted from the backlight source 110.

[0199] <Second embodiment>

[0200] Next, a second embodiment will be described.

[0201] Fig.11 , Fig. 12A and Fig. 12B Schematic diagram showing a method of creating brightness setting data in the image display method according to the present embodiment.

[0202] Brightness setting data D22 of the image display method of this embodiment k The creation step S2 is different from the image display method of the first embodiment.

[0203] In addition, in the following description, only the differences from the first embodiment are described as a principle. Except for the matters described below, it is the same as the first embodiment. The same is true for the other embodiments described below.

[0204] Next, for the kth input image IM k Brightness setting data D22 k The creation step S2 is described below.

[0205] like Fig. 12A and Fig. 12B As shown, the brightness setting data creating unit 153a sets the brightness of each light emitting area 110s of the backlight source 110 to match the brightness of the light emitting area 110s immediately following the k-th input image IM. k The previous k-1th input image IM k－1 Created brightness setting data D22 k－1 The brightness setting value L22 k－1 The input image IM is processed so that the brightness difference ΔL between (n, m) is within the threshold ΔLdet. k The setting value L22 that specifies the brightness of each light emitting area 110s k (n, m).

[0206] Specifically, first, Fig.11 As shown, the brightness setting data creating unit 153a generates a brightness setting data based on the input image IM. k , using the same method as the first embodiment to create brightness data D1 k .

[0207] Next, the brightness setting data creating unit 153a calculates the brightness data D1 k The element e1 located at the nth row and the mth column k The brightness L of (n, m) k (n, m) and the k-1th input image IM k－1 Created brightness setting data D22 k－1The element e22 located at the nth row and the mth column k－1 The setting value L22 of the brightness of (n, m) k－1 The difference ΔLa between (n, m).

[0208] Next, the brightness setting data creating unit 153 a determines whether the difference ΔLa is equal to or smaller than a threshold ΔLdet.

[0209] When the difference ΔLa is determined to be less than the threshold ΔLdet, the brightness setting data creating unit 153a changes the brightness data D1 to k The element e1 located at the nth row and the mth column k The brightness L of (n, m) k (n, m) is set as brightness setting data D22 k The element e22 located at the nth row and the mth column k The value of (n, m), that is, the set value L22 of the brightness of the light-emitting region 110s located in the nth row and the mth column k (n, m).

[0210] If the difference ΔLa is not less than the threshold ΔLdet, the brightness setting data creating unit 153a determines that the brightness L k Is (n, m) greater than the brightness setting value L22? k－1 (n, m).

[0211] Determine the brightness L k (n, m) is greater than the brightness setting value L22 k－1 (n, m), such as Fig.11 and Fig. 12A As shown, the brightness setting data creating unit 153a sets the brightness setting value L22 k－1 The value obtained by adding the threshold value ΔLdet to (n, m) is set as the brightness setting data D22 k The element e22 located at the nth row and the mth column k The value of (n, m), that is, the set value L22 of the brightness of the light-emitting region 110s located in the nth row and the mth column k (n, m).

[0212] Determine the brightness L k (n, m) is not greater than the brightness setting value L22 k－1 (n, m), such as Fig.11 and Fig. 12B As shown, the brightness setting data creating unit 153a will set the brightness setting value L22 k－1 The value obtained by subtracting the threshold value ΔLdet from (n, m) is set as the brightness setting data D22 k The element e22 located at the nth row and the mth column kThe value of (n, m), that is, the set value L22 of the brightness of the light-emitting region 110s located in the nth row and the mth column k (n, m).

[0213] The brightness setting data creating unit 153a performs this process on all the light emitting areas 110s of the backlight 110. In this way, the brightness setting data D22 is created. k .

[0214] In addition, the method of creating the brightness setting data is not limited to the above method. For example, the brightness setting data creating unit 153a determines the brightness L k Is (n, m) greater than the brightness setting value L22? k－1 (n, m), thereby determining the brightness L k (n, m) and the brightness setting value L22 k－1 However, the brightness L k (n, m) and the brightness setting value L22 k－1 The method for determining the magnitude relationship of (n, m) is not limited to the above method. For example, the brightness setting data creation unit 153a may determine the brightness L k Is (n, m) less than the brightness setting value L22? k－1 (n, m).

[0215] As described above, in the image display method of this embodiment, an input image IM k Create brightness setting data D22 k In step S2, each light emitting region 110s of the backlight source 110 is calibrated to correspond to the light emitting region 110s immediately adjacent to the input image IM in the plurality of input images IM. k The previous input image IM k－1 Created brightness setting data D22 k－1 The brightness setting value L22 k－1 The set value L22 of the brightness of each light-emitting region 110s is defined so that the brightness difference ΔL between (n, m) is within the threshold ΔLdet. k (n, m) Therefore, it is possible to suppress the amount of change in brightness of each light emitting region 110s from exceeding the threshold value ΔLdet when changing the image displayed on the liquid crystal panel 130. As described above, it is possible to provide an image display method that can reduce the influence of the destruction of the color mixing balance of the light Lw.

[0216] In addition, for the input image IM k Create brightness setting data D22 k In step S2, the input image IM is created k The maximum grayscale Gmax of each area IMs corresponding to each light emitting area 110s of the backlight source 110 is converted into the brightness Lk Brightness data D1 of (n, m) k Moreover, for the brightness data D1 k Brightness L k (n, m) and the input image IM k－1 Created brightness setting data D22 k－1 The brightness setting value L22 k－1 The light-emitting area 110s where the difference ΔLa between (n, m) is within the threshold ΔLdet is set to the brightness data D1 k Brightness L k (n, m) is set as the setting value L22 of the brightness of the light-emitting area 110s. k (n, m).

[0217] In addition, for the backlight source 110, the difference ΔLa exceeds the threshold ΔLdet and the brightness data D1 k The brightness L(n, m) is less than the input image IM k－1 Created brightness setting data D22 k－1 The brightness setting value L22 k－1 The luminous area 110s will be changed from the input image IM k－1 Created brightness setting data D22 k－1 The brightness setting value L22 k－1 The value obtained by subtracting the threshold ΔLdet from (n, m) is set as the set value L22 of the brightness of the light-emitting region 110s. k (n, m).

[0218] In addition, for the backlight source 110, the difference ΔLa exceeds the threshold ΔLdet and the brightness data D1 k Brightness L k (n, m) is greater than the input image IM k－1 Created brightness setting data D22 k－1 The brightness setting value L22 k－1 The luminous area 110s of (n, m) will be k－1 Created brightness setting data D22 k－1 The brightness setting value L22 k－1 The value obtained by adding the threshold ΔLdet to (n, m) is set as the set value L22 of the brightness of the light-emitting area 110s. k (n, m).

[0219] Therefore, the input image IM can be converted into k Created brightness setting data D22 k The brightness setting value L22 k (n, m) and the input image IM immediately before k－1Created brightness setting data D22 k The brightness setting value L22 k－1 The brightness difference ΔL of (n, m) is controlled within the threshold ΔLdet.

[0220] <Third Embodiment>

[0221] Next, a third embodiment will be described.

[0222] Fig.13 Schematic diagram showing a method of creating brightness setting data in the image display method according to the present embodiment.

[0223] Fig.14 and Fig.15 This is a schematic diagram showing a method of creating grayscale setting data in the image display method according to the present embodiment.

[0224] Brightness setting data D32 of the image display method of this embodiment k Creation process S2 and grayscale setting data D33 k The creation step S3 is different from the image display method of the first embodiment.

[0225] It should be noted that, below, an example is described in which the difference in response speed between the light emitting element 114a and the green phosphor 114g is sufficiently small, and the difference in response speed between the light emitting element 114a and the red phosphor 114r is large. It should be noted that, in the following example, the blue light Lb corresponds to the first light, and the red light Lr corresponds to the second light. In addition, the red phosphor 114r corresponds to the first phosphor. In addition, the blue sub-pixel 130sb corresponds to the first sub-pixel, and the red sub-pixel 130sr corresponds to the second sub-pixel.

[0226] First, for the kth input image IM k Brightness setting data D32 k The creation step S2 is described below.

[0227] The brightness setting data creating unit 153a uses Fig.13 The brightness data D1 is created in the same way as in the first embodiment shown in FIG. k , the brightness data D1 k Set as brightness setting data D32 k Therefore, in this embodiment, the brightness setting data D32 k The element e32 at row n and column m of k The value of (n, m) is the maximum grayscale Gmax converted to brightness L k The following will be the value of brightness L k (n, m) is called the "brightness setting value L k (n, m)”.

[0228] Next, for the kth input image IM k Grayscale setting data D33 k The creation step S3 is described below.

[0229] The grayscale setting data creating unit 153b generates grayscale setting data based on the brightness setting data D32. k Corrected input image IM k Each corrected image IMa k , grayscale setting data D33 is created to define grayscale setting values ​​Exb(i, j) of the blue sub-pixel 130sb, grayscale setting values ​​Exg(i, j) of the green sub-pixel 130sg, and grayscale setting values ​​Exr(i, j) of the red sub-pixel 130sr included in each pixel 130p of the liquid crystal panel 130. k .

[0230] First, if Fig.14 As shown, the grayscale setting data creating unit 153b creates the correction image IMa. k Specifically, the brightness setting data D32 is used. k The luminance value V(i, j) directly below the pixel at the i-th row and the j-th column is estimated by using the estimated luminance value V(i, j) and the correction formula Ef to correct the input image IM. k The grayscale setting data creation unit 153b sets the output value Efb(i, j) of the correction formula Ef as the corrected image IMa. k The blue grayscale value of the pixel IMp located in the i-th row and the j-th column is set as the output value Efg(i, j) to be the corrected image IMa k The green grayscale value of the pixel IMp located in the i-th row and the j-th column is set as the output value Efr(i, j) to be the corrected image IMa k The grayscale value of the red pixel IMp located in the i-th row and the j-th column. k The blue grayscale value Efb(i, j), the green grayscale value Efg(i, j) and the red grayscale value Efr(i, j) of the pixel Imp located in the i-th row and the j-th column are associated with each other.

[0231] Next, if Fig.15 As shown, the grayscale setting data creation unit 153b calculates the input image IM k Brightness setting data D32 k The element e32 at row n and column m of kThe setting value L of the brightness of (n, m) k (n, m) and the input image IM k－1 Brightness setting data D32 k－1 The element e32 at row n and column m k－1 The setting value L of the brightness of (n, m) k－1 The brightness difference ΔL of (n, m).

[0232] Next, the grayscale setting data creation unit 153b determines whether the luminance difference ΔL is less than the threshold ΔLdet. In addition, the grayscale setting data creation unit 153b extracts the correction image IMa. k The area IMs corresponding to the light-emitting area 110s located in the nth row and the mth column.

[0233] If it is determined that the luminance difference ΔL is less than the threshold ΔLdet, the grayscale setting data creating unit 153b does not generate the corrected image IMa. k The blue grayscale value Efb(i, j) of each pixel IMp included in the extracted area IMs is corrected to be equal to the grayscale setting data D33 k The corresponding element e33 k Similarly, the grayscale setting data creation unit 153b does not correct the green grayscale value Efg(i, j) of each pixel IMp included in the extracted area IMs, and sets the grayscale setting data D33 as follows: k Corresponding element e33 k Similarly, the grayscale setting data creation unit 153b does not correct the red grayscale value Efr(i, j) of each pixel IMp included in the extracted area IMs, and the grayscale setting data D33 k The corresponding element e33 k The red grayscale setting value Exr(i, j) of (i, j).

[0234] If the difference ΔLa is not less than the threshold ΔLdet, the brightness setting data creating unit 153a determines whether the brightness setting value L k Is (n, m) greater than the brightness setting value L? k－1 (n, m).

[0235] Determine the brightness setting value L k (n, m) is greater than the brightness setting value L k－1 In the case of (n, m), the grayscale setting data creating unit 153b multiplies the blue grayscale value Efb(i, j) of each pixel IMp included in the extracted area IMs by the correction coefficient K1. The multiplied value is set as the grayscale setting data D33k The corresponding element e33 k Similarly, the grayscale setting data creation unit 153b multiplies the green grayscale value Efg(i, j) of each pixel IMp included in the extracted area IMs by the correction coefficient K1. The multiplied value is set as the grayscale setting data D33 k The corresponding element e33 k The grayscale setting data creation unit 153b does not correct the red grayscale value Efr(i, j) of each IMp included in the extracted area IMs, and sets it as grayscale setting data D33 k The corresponding element e33 k The red grayscale setting value Exr(i, j) of (i, j).

[0236] Determine the brightness setting value L k (n, m) is not greater than the brightness setting value L k－1 In the case of (n, m), the grayscale setting data creating unit 153b multiplies the blue grayscale value Efb(i, j) of each pixel IMp included in the extracted area IMs by the correction coefficient K2. The multiplied value is set as the grayscale setting data D33 k The corresponding element e33 k Similarly, the grayscale setting data creation unit 153b multiplies the green grayscale value Efg(i, j) of each pixel IMp included in the area IMs by the correction coefficient K2. The multiplied value is set as the grayscale setting data D33 k The corresponding element e33 k The grayscale setting data creation unit 153b does not correct the red grayscale value Efr(i, j) of each pixel IMp(i, j) included in the extracted area IMs, and sets it as grayscale setting data D33 k The corresponding element e33 k The setting value Exr(i, j) of the blue grayscale of (i, j).

[0237] The grayscale setting data creating unit 153b generates the correction image IMa. k The above processing is performed on all pixels IMp. Thus, grayscale setting data D33 is created which specifies the grayscale setting values ​​Exb(i, j), Exg(i, j), and Exr(i, j) of each sub-pixel 130sb, 130sg, and 130sr. k .

[0238] In the present embodiment, in the light-emitting region 110s where the luminance increases by exceeding the threshold ΔLdet, the amount of light from the light-emitting element 114a and the green phosphor 114g increases faster than the amount of light from the red phosphor 114r, so the color of the light Lw becomes a greenish blue (cyan) color. Therefore, in the present embodiment, the correction coefficient K1 is set to a value less than 1, and the grayscale value Efb(i, j) of blue is multiplied by the grayscale value Efg(i, j) of green. Thus, for the pixel 130p located directly above the light-emitting region 110s where the luminance increases by exceeding the threshold ΔLdet, the grayscale setting values ​​Exb(i, j) and Exg(i, j) of each sub-pixel 130sb and 130sg are defined in such a way that the amount of light transmitted by the blue light Lb and the green light Lg is reduced.

[0239] In addition, in the present embodiment, in the light-emitting region 110s where the luminance drops due to exceeding the threshold ΔLdet, the amount of light from the red phosphor 114r decreases more slowly than the amount of light from the light-emitting element 114a and the green phosphor 114g during the drop, and thus the color of the light Lw becomes a reddish color. Therefore, in the present embodiment, the correction coefficient K2 is set to a value greater than 1, and the grayscale value Efb(i, j) of blue is multiplied by the grayscale value Efg(i, j) of green. Thus, for the pixel 130p located directly above the light-emitting region 110s where the luminance drops due to exceeding the threshold ΔLdet, the grayscale setting values ​​Exb(i, j) and Exg(i, j) of each sub-pixel 130sb and 130sg are defined in such a manner that the amount of light transmitted by the blue light Lb and the green light Lg increases.

[0240] In this way, by adjusting the light transmission amounts of the lights Lb and Lg of the sub-pixels 130sb and 130sg of the liquid crystal panel 130 , it is possible to reduce the influence of the destruction of the color mixing balance of the lights Lw emitted from the light emitting regions 110s .

[0241] Next, the effects of this embodiment will be described.

[0242] In the image display method of this embodiment, an input image IM among a plurality of input images IM is k Create grayscale setting data D33 k In step S3, the input image IM is calculated for each light emitting area 110s. k Brightness setting data D32 k The brightness setting value L k (n, m) and the input image IM in the plurality of input images IM k The previous input image IM k－1 Brightness setting data D32 k－1 The setting value L of the brightness of (n, m) k－1Furthermore, for the pixel 130p located directly above the light emitting region 110s where the light emitting region 110s has a light emitting difference ΔL exceeding the threshold ΔLdet in the liquid crystal panel 130, the correction image IMa is adjusted based on the change in the ratio of the amount of blue light Lb, the amount of green light Lg, and the amount of red light Lr contained in the light Lw emitted from the light emitting region 110s when the set value of the brightness changes. k Correction is performed to define the blue grayscale setting value Exb(i, j), the green grayscale setting value Exg(i, j), and the red grayscale setting value Exr(i, j).

[0243] In this way, by adjusting the balance of the transmitted light amounts of the lights Lb, Lg, and Lr of the sub-pixels 130sb and 130sr of the liquid crystal panel 130 , it is possible to reduce the influence of the destruction of the color mixing balance of the lights Lw emitted from the light emitting regions 110s .

[0244] In this embodiment, the corrected image IMa k In each pixel Imp, the blue grayscale value Efb(i, j) corresponding to the blue light Lb, the green grayscale value Efg(i, j) corresponding to the green light Lg, and the red grayscale value Efr(i, j) corresponding to the red light Lr are correlated with each other. k Create grayscale setting data D33 k In the process of determining the correction coefficients K1 and K2, for the light emitting area 110s where the brightness difference ΔL exceeds the threshold ΔLdet, the correction coefficients K1 and K2 are determined based on the change in the ratio of the amount of blue light Lb, the amount of green light Lg, and the amount of red light Lr contained in the light Lw emitted from the light emitting area 110s when the set value of the brightness changes. Furthermore, for the pixel 130p located directly above the light emitting area 110s where the brightness difference ΔL exceeds the threshold ΔLdet, the correction coefficients K1 and K2 are multiplied by the correction image IMa. k The blue grayscale value Efb(i, j) and the green grayscale value Efg(i, j) are determined by the correction coefficients K1 and K2, respectively, and the blue grayscale setting value Exr(i, j) and the green grayscale setting value Exg(i, j) are determined. Therefore, the balance of the light transmission amount of each sub-pixel 130sb, 130sr of the liquid crystal panel 130 can be adjusted by a simple method of multiplying the correction coefficients K1 and K2.

[0245] In addition, for the input image IM k Brightness setting data D32 k The brightness setting value L k (n, m) is greater than the input image IM k－1 Brightness setting data D32 k－1 The brightness setting value L k－1For the light emitting region 110s of (n, m), the correction coefficient K1 is set to a value smaller than 1. k Brightness setting data D32 k The brightness setting value L k (n, m) is smaller than the input image IM k－1 Brightness setting data D32 k－1 The brightness setting value L k－1 For the light-emitting region 110s with a luminance difference ΔL exceeding the threshold ΔLdet, the correction coefficient K2 is set to a value greater than 1. Furthermore, for the pixel 130p located directly above the light-emitting region 110s with a luminance difference ΔL exceeding the threshold ΔLdet, the correction coefficients K1 and K2 are multiplied by the corrected image IMa. k Therefore, the balance of the light transmission amounts of the light Lb, Lg, and Lr of each sub-pixel 130sb and 130sr of the liquid crystal panel 130 can be adjusted by a simple method of multiplying the correction coefficients K1 and K2.

[0246] Figure 16 to Figure 18 A schematic diagram showing a modified example of the method of creating grayscale setting data in the image display method according to the present embodiment.

[0247] like Fig.16 As shown, the correction coefficient K1 can be set to a value less than 1 and multiplied by the grayscale value Efb(i, j) of blue and the grayscale value Efg(i, j) of green, and the correction coefficient K2 can be set to a value less than 1 and multiplied by the grayscale value Efr(i, j) of red. In the light emitting area 110s where the brightness of the liquid crystal panel 130 drops by exceeding the threshold ΔLdet, the color of the light Lw is a bit red. Therefore, for the pixel 130p located directly above the light emitting area 110s where the brightness drops by exceeding the threshold ΔLdet, as shown in FIG. Fig.16 As shown, the grayscale setting value Exr(i, j) of the red sub-pixel 130sr can be specified so that the amount of transmitted light of the red light Lr decreases.

[0248] In addition, if Fig.17 As shown, the correction coefficient K1 can be set to a value greater than 1, and the correction coefficient K1 can be multiplied by the grayscale value Efr(i, j) of red. The correction coefficient K2 can be set to a value greater than 1, and the correction coefficient K2 can be multiplied by the grayscale value Efb(i, j) of blue and the grayscale value Efg(i, j) of green. In the luminous region 110s where the luminance is increased by exceeding the threshold value ΔLdet, the color of the light Lw becomes a blue (cyan) color with a hint of green. Therefore, for the pixel 130p located directly above the luminous region 110s where the luminance is increased by exceeding the threshold value ΔLdet, as shown in FIG. Fig.17As shown, the grayscale setting value Exr(i, j) of the red sub-pixel 130sr can be specified so that the amount of transmitted light of the red light Lr increases.

[0249] In addition, if Fig.18 As shown, the correction coefficient K1 is set to a value greater than 1, and the correction coefficient K1 is multiplied by the red grayscale value Efr(i, j). The correction coefficient K2 is set to a value less than 1, and the correction coefficient K2 is multiplied by the red grayscale value Efr(i, j).

[0250] It should be noted that the specific values ​​of the correction coefficients K1 and K2 can be appropriately set according to the type of the light emitting element 114a and the type of the phosphors 114g and 114r. In addition, when the difference in response speed between the light emitting element 114a and the green phosphor 114g is large enough to affect the degree of destruction of the color mixing balance of the light Lw, the correction image IMa can be corrected based on the change in the ratio of the light amount of the blue light Lb to the light amount of the green light Lg. k , specify the blue grayscale setting value Exb(i, j) and the green grayscale setting value Exg(i, j).

[0251] The methods of the above-mentioned multiple embodiments can be appropriately combined within the scope of non-contradiction. For example, the method of the first embodiment and the method of the third embodiment can be combined. The specific method is described in detail below.

[0252] As in the first embodiment, based on the brightness data D1 k The brightness L of each area IMs k (n, m) and brightness setting data D2 k－1 The setting value L2 of the brightness of each light emitting area 110s k－1 The average value of (n, m) specifies the brightness setting data D2 k The setting value L2 of the brightness of each light emitting area 110s k (n, m).

[0253] Next, similarly to the third embodiment, the brightness setting data D2 is created. k Correct the input image IM k Corrected image IMa k .

[0254] Next, for each light emitting area 110s, the brightness setting data D2 is calculated. k The brightness setting value L k (n, m) and brightness setting data D2 k－1 The setting value L of the brightness of (n, m) k－1 The brightness difference ΔL of (n, m).

[0255] Next, for the pixel 130p located directly above the light emitting region 110s where the luminance difference ΔL exceeds the threshold ΔLdet, based on the set value L of the luminance, k－1 (n, m) becomes the brightness setting value L k The change in the ratio of the amount of blue light Lb, the amount of green light Lg, and the amount of red light Lr included in the light Lw emitted from the light emitting area 110s at (n, m) has an effect on the corrected image IMa. k Correction is performed to define the blue grayscale setting value Exb(i, j), the green grayscale setting value Exg(i, j), and the red grayscale setting value Exr(i, j).

[0256] Industrial Applicability

[0257] The present invention can be used, for example, in displays of devices such as televisions, personal computers, or game consoles.

Claims

1. An image display method, comprising the following steps: For each of a plurality of continuous input images input to a controller of a backlight having a plurality of light emitting areas arranged in a matrix and a liquid crystal panel having a plurality of pixels, A step of creating brightness setting data that specifies a setting value of brightness of each of the light-emitting areas of the backlight source; A step of creating grayscale setting data that specifies a grayscale setting value for each pixel of the liquid crystal panel based on the brightness setting data and each of the input images; as well as The process of controlling the backlight source based on the brightness setting data, controlling the liquid crystal panel based on the grayscale setting data, and displaying an image on the liquid crystal panel; The step of creating the brightness setting data for a first input image among the plurality of input images comprises the following steps: A step of creating brightness data obtained by converting the maximum grayscale of each area corresponding to each of the light-emitting areas of the backlight source in the first input image into brightness; A process for determining a setting value of the brightness of each of the light-emitting areas based on the brightness of each of the areas of the brightness data and an average value of the setting value of the brightness of each of the light-emitting areas of the brightness setting data created for a second input image that is immediately before the first input image among the plurality of input images, Each of the light emitting regions of the backlight source can emit light including a first light and a second light having different emission peak wavelengths, and is provided with a light emitting element that emits the first light and a first phosphor that emits the second light when the first light is incident.

2. An image display method, comprising the following steps: For each of a plurality of continuous input images input to a controller of a backlight having a plurality of light emitting areas arranged in a matrix and a liquid crystal panel having a plurality of pixels, A step of creating brightness setting data that specifies a setting value of brightness of each of the light-emitting areas of the backlight source; A step of creating grayscale setting data that specifies a grayscale setting value for each pixel of the liquid crystal panel based on the brightness setting data and each of the input images; as well as The process of controlling the backlight source based on the brightness setting data, controlling the liquid crystal panel based on the grayscale setting data, and displaying an image on the liquid crystal panel; wherein, in the process of creating the brightness setting data for a first input image among the plurality of input images, the brightness setting value of each light-emitting area of ​​the backlight source is specified in such a manner that the brightness difference from the brightness setting value of the brightness setting data created for a second input image immediately before the first input image among the plurality of input images is within a threshold value, Furthermore, in the step of creating the brightness setting data for the first input image, creating brightness data obtained by converting the maximum grayscale of each area corresponding to each of the light-emitting areas of the backlight source in the first input image into brightness, For the luminous area where the difference between the brightness of the brightness data and the brightness setting value of the brightness setting data created for the second input image is within the threshold, setting the brightness of the brightness data to the brightness setting value, For the luminous area where the difference exceeds the threshold value and the brightness of the brightness data is less than the brightness setting value of the brightness setting data created for the second input image, a value obtained by subtracting the threshold value from the brightness setting value of the brightness setting data created for the second input image is set as the brightness setting value, For the luminous area where the difference exceeds the threshold value and the brightness of the brightness data is greater than the brightness setting value of the brightness setting data created for the second input image, a value obtained by adding the threshold value to the brightness setting value of the brightness setting data created for the second input image is set as the brightness setting value, Each of the light emitting regions of the backlight source can emit light including a first light and a second light having different emission peak wavelengths, and is provided with a light emitting element that emits the first light and a first phosphor that emits the second light when the first light is incident.

3. An image display method comprising the following steps: For each of a plurality of continuous input images input to a controller of a backlight having a plurality of light emitting areas arranged in a matrix and a liquid crystal panel having a plurality of pixels, A step of creating brightness setting data that specifies a setting value of brightness of each of the light-emitting areas of the backlight source based on each of the input images; A step of creating grayscale setting data defining a first grayscale setting value of a first sub-pixel and a second grayscale setting value of a second sub-pixel included in each pixel of the liquid crystal panel based on each corrected image obtained by correcting each input image using the brightness setting data; as well as The process of controlling the backlight source based on the brightness setting data, controlling the liquid crystal panel based on the grayscale setting data, and displaying an image on the liquid crystal panel; Each of the light-emitting regions of the backlight source can emit light including a first light and a second light having different light emission peak wavelengths, and is provided with a light-emitting element that emits the first light and a first phosphor that emits the second light when the first light is incident. Each of the first sub-pixels can transmit the first light, and each of the second sub-pixels can transmit the second light, In the step of creating the grayscale setting data for a first input image among the plurality of input images, For each of the luminous areas, a brightness difference between the brightness setting value of the brightness setting data of the first input image and the brightness setting value of the brightness setting data of the second input image immediately before the first input image among the plurality of input images is calculated, In the liquid crystal panel, for the pixel located directly above the luminous area where the brightness difference exceeds the threshold, the corrected image is corrected according to the change in the ratio of the amount of the first light to the amount of the second light contained in the light emitted from the luminous area when the set value of the brightness changes, and the set value of the first grayscale and the set value of the second grayscale are specified.

4. The image display method according to claim 3, wherein: In each pixel of the corrected image, a first grayscale value of a color corresponding to the color of the first light and a second grayscale value of a color corresponding to the color of the second light are associated with each other, In the step of creating the grayscale setting data for the first input image, for the pixel located directly above the light-emitting area where the brightness difference exceeds the threshold, The correction coefficient corresponding to the change in the ratio of the amount of light of the first light to the amount of light of the second light contained in the light emitted from the light-emitting area when the set value of the brightness changes is multiplied by the first grayscale value or the second grayscale value of the corrected image to determine the set value of the first grayscale and the set value of the second grayscale.

5. The image display method according to claim 4, wherein: For the luminous area where the brightness setting value of the brightness setting data of the first input image is greater than the brightness setting value of the brightness setting data of the second input image, the correction coefficient is set to a value smaller than 1, For the luminous area where the brightness setting value of the brightness setting data of the first input image is smaller than the brightness setting value of the brightness setting data of the second input image, the correction coefficient is set to a value greater than 1, For the pixel located directly above the light-emitting region where the brightness difference exceeds the threshold, the correction coefficient is multiplied by the first grayscale value of the corrected image.

6. The image display method according to claim 4, wherein: For the luminous area where the brightness setting value of the brightness setting data of the first input image is greater than the brightness setting value of the brightness setting data of the second input image, the correction coefficient is set to a value greater than 1, For the luminous area where the brightness setting value of the brightness setting data of the first input image is smaller than the brightness setting value of the brightness setting data of the second input image, the correction coefficient is set to a value smaller than 1, For the pixel located directly above the light-emitting region where the brightness difference exceeds the threshold, the correction coefficient is multiplied by the second grayscale value of the corrected image.

7. The image display method according to claim 4, wherein: For the light-emitting area where the brightness difference exceeds the threshold, the correction coefficient is set to a value less than 1, For the pixel located directly above the luminous area where the brightness difference exceeds the threshold and the brightness setting value of the brightness setting data of the first input image is greater than the brightness setting value of the brightness setting data of the second input image, multiplying the correction coefficient by the first grayscale value of the correction image, For the pixel located directly above the luminous area where the brightness difference exceeds the threshold and the brightness setting value of the brightness setting data of the first input image is smaller than the brightness setting value of the brightness setting data of the second input image, the correction coefficient is multiplied by the second grayscale value of the corrected image.

8. The image display method according to claim 4, wherein: For the luminous area where the brightness difference exceeds the threshold, the correction coefficient is set to a value greater than 1, For the pixel located directly above the luminous area where the brightness difference exceeds the threshold and the brightness setting value of the brightness setting data of the first input image is greater than the brightness setting value of the brightness setting data of the second input image, multiplying the correction coefficient by the second grayscale value of the correction image, For the pixel located directly above the luminous area where the brightness difference exceeds the threshold and the brightness setting value of the brightness setting data of the first input image is smaller than the brightness setting value of the brightness setting data of the second input image, the correction coefficient is multiplied by the first grayscale value of the corrected image.

Images