Display device

Abstract

A display device includes: a display including a display panel in which a plurality of pixels are arranged, and a decorative member arranged on one of a display surface side and a rear surface side of the display panel; and a color changer that emits illumination light on the display panel and the decorative member from the rear surface side of the display. Each of the plurality of pixels includes a pixel display area that emits display light and a transmission area that transmits light. The color changer emits illumination light of a predetermined color on the display panel and the decorative member according to a designed color of the decorative member to be presented to an observer.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Japanese Patent Application No. 2023-103472 filed on June 23, 2023, and Japanese Patent Application No. 2024-26834 filed on February 26, 2024, the entire disclosures of which are incorporated herein by reference. Technical Field

[0003] The present disclosure generally relates to a display device. Background Art

[0004] In the prior art, it is known that a liquid crystal display device in which a light-transmitting decorative component is arranged on the display surface side of a display panel to improve the design. For example, unexamined Japanese patent application publication No. 2018-10029 describes a display device including a display device front surface protection panel and a display panel. The display device front surface protection panel includes a first color adjustment layer for adjusting the color of the light-transmitting substrate, a first decorative layer formed by a resin including a white pigment, and a second color adjustment layer for adjusting the color of the first decorative layer on one surface of the light-transmitting substrate. The first color adjustment layer is arranged in the display area and the non-transparent area of ​​the light-transmitting substrate. The second color adjustment layer is arranged on the first color adjustment layer arranged in the non-transparent area of ​​the light-transmitting substrate. The first decorative layer is arranged on the second color adjustment layer.

[0005] In the unexamined Japanese patent application publication No. 2018-10029, the color of the display area is adjusted by the first color adjustment layer. The color of the non-transparent area is adjusted by the first color adjustment layer, the second color adjustment layer and the first decorative layer. Thus, both the display area and the non-transparent area can be adjusted to the desired color.

[0006] In the display device of Unexamined Japanese Patent Application Publication No. 2018-10029, the display device front surface protection panel must be replaced in order to change the color of the display area and the color of the non-transparent area of ​​the manufactured display device. In addition, when the display device of Unexamined Japanese Patent Application Publication No. 2018-10029 is in use, the color of the display area and the color of the non-transparent area cannot be changed.

[0007] The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a display device capable of easily changing the color of a design presented to an observer. Summary of the invention

[0008] The display device of the present disclosure for achieving the above-mentioned purpose includes:

[0009] A display including a display panel in which a plurality of pixels are arranged and a decoration member arranged on one of a display surface side and a rear surface side of the display panel; and

[0010] a color changer that emits illumination light onto the display panel and the decorative member from the rear surface side of the display, wherein each of the plurality of pixels includes a pixel display region that emits display light and a transmission region that transmits light, and the color changer emits the illumination light of a predetermined color onto the display panel and the decorative member according to the color of the design of the decorative member to be presented to an observer.

[0011] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the disclosure.

[0012] According to the present disclosure, the color changer emits light of a predetermined color on the display panel and the decoration member according to the color of the design of the decoration member to be presented to the observer, and thus, the color of the design presented to the observer can be easily changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] A more complete understanding of the present application can be obtained when the following detailed description is considered in conjunction with the following drawings, in which:

[0014] Figure 1 is a schematic diagram showing a side surface of a display device according to Embodiment 1;

[0015] Figure 2 is a plan view showing a display panel according to Embodiment 1;

[0016] Figure 3 is a plan view showing a pixel according to Embodiment 1;

[0017] Figure 4 It is taken along line AA Figure 3 A cross-sectional view of a pixel shown in ;

[0018] Figure 5 It is taken along line BB Figure 3 A cross-sectional view of a pixel shown in ;

[0019] Figure 6 is a plan view showing a decorative member according to Embodiment 1;

[0020] Figure 7 is a diagram showing a view taken along line CC Figure 6 A cross-sectional view of the decorative component shown in ;

[0021] Figure 8 is a plan view showing a color changer according to Embodiment 1;

[0022] Fig. 9 is a schematic diagram showing a cross section of a color changer according to Embodiment 1;

[0023] Fig.10 is a schematic diagram showing a pixel of a color changer according to Embodiment 1;

[0024] Fig.11 is a block diagram showing the configuration of a controller according to Embodiment 1;

[0025] Fig.12 is a schematic diagram showing a side surface of a display panel, a decoration member, and a color changer according to Embodiment 2;

[0026] Fig.13 is a plan view showing a region where a display element is not displayed according to Embodiment 2;

[0027] Fig.14 is a schematic diagram showing a side surface of a display device according to Embodiment 3;

[0028] Fig.15 is a plan view showing a display panel according to Embodiment 4;

[0029] Fig.16 is a schematic diagram showing a pixel according to Embodiment 4;

[0030] Fig.17 is a diagram showing a pixel circuit according to Embodiment 4;

[0031] Fig.18 is a cross-sectional view showing an organic light emitting diode according to Example 4;

[0032] Fig.19 is a plan view showing an example of illumination light according to Embodiment 5;

[0033] Fig. 20 is a plan view showing an example of display of a display device according to Embodiment 5;

[0034] Fig.21 is a schematic diagram showing the connection of a signal line and a pixel electrode according to Embodiment 6;

[0035] Fig. 22 is a cross-sectional view showing a micro LED element according to a modified example;

[0036] Fig.23 is a schematic diagram showing a pixel according to a modified example;

[0037] Fig.24 is a cross-sectional view showing a light shielding layer according to a modified example;

[0038] Fig.25 is a cross-sectional view showing a light shielding layer according to a modified example;

[0039] Fig.26 is a schematic diagram illustrating a side surface of a display device according to a modified example. DETAILED DESCRIPTION

[0040] Hereinafter, a display device according to various embodiments is described with reference to the accompanying drawings.

[0041] Example 1

[0042] Reference Figures 1 to 11 The display device 10 according to the present embodiment will be described. Figure 1 As shown, the display device 10 includes a display 50, a color changer 300 and a controller 500. The display 50 includes a display panel 100 and a decorative member 200. The display panel 100 displays display elements. The decorative member 200 is a member that provides a design to an observer (user). The color changer 300 emits illumination light onto the display panel 100 and the decorative member 200 from the rear surface side of the display 50. The controller 500 controls the display panel 100 and the color changer 300. In this specification, the term "display element" refers to a character, a character string, an image, an icon, an operation button, a menu, etc.

[0043] The display device 10 is provided on a dashboard of a vehicle, furniture, a home electronic device, etc. Note that in this specification, for ease of understanding, Figure 1 In the display device 10, the longitudinal right direction (right direction on the paper) is called the "+X direction", the upward direction (upward direction on the paper) is called the "+Z direction", and the direction perpendicular to the +X direction and the +Z direction (depth direction on the paper) is called the "+Y direction".

[0044] show

[0045] In one example, the display panel 100 of the display 50 is implemented as a micro light emitting diode (LED) display panel. Figure 2 As shown, the display panel 100 includes a light-transmitting substrate 110 and a sealing member 170 .

[0046] The light-transmitting substrate 110 of the display panel 100 includes a displayable area 120 and a frame area 160 surrounding the displayable area 120. The displayable area 120 is an area where display elements can be displayed. Pixels 122R that emit red light, pixels 122G that emit green light, and pixels 122B that emit blue light are arranged in the displayable area 120. The frame area 160 is an area where display elements cannot be displayed. Hereinafter, pixels 122R, 122B, and 122G may be collectively referred to as "pixels 122".

[0047] The pixel 122R, the pixel 122B, and the pixel 122G are arranged in the +X direction to form one main pixel 128. The main pixel 128 is arranged in a matrix. The pixel 122R, the pixel 122B, and the pixel 122G are also arranged in a single row in the Y direction, respectively.

[0048] like Figure 3 As shown, each pixel 122 includes a transmission area 124 and a pixel display area 126. The transmission area 124 transmits light. The pixel display area 126 is an area that emits display light for displaying display elements. In the present embodiment, the micro LED elements 130 are arranged in the pixel display area 126. Specifically, a micro LED element 130R that emits red display light is arranged in the pixel display area 126 of the pixel 122R. A micro LED element 130G that emits green display light is arranged in the pixel display area 126 of the pixel 122G. A micro LED element 130B that emits blue display light is arranged in the pixel display area 126 of the pixel 122B. Note that in Figure 3 The sealing member 170 and the first insulating layer 146 described later are omitted. Furthermore, it is noted that the micro LED element 130R, the micro LED element 130G, and the micro LED element 130B correspond to light emitting elements.

[0049] like Figure 4 As shown, micro LED element 130R includes a micro LED chip 132R emitting red light, a cathode 134, and an anode 136. Micro LED element 130G includes a micro LED chip (not shown) emitting green light, a cathode 134, and an anode 136. Micro LED element 130B includes a micro LED chip (not shown) emitting blue light, a cathode 134, and an anode 136. Cathode 134 and anode 136 are respectively connected to a first wiring 142 and a second wiring 144 described later.

[0050] The light emission intensity (intensity of display light) of micro LED element 130R, micro LED element 130G, and micro LED element 130B is independently adjusted by power supplied from an unillustrated driver integrated circuit (IC) via first wiring 142 and second wiring 144. As a result, display elements are displayed on display panel 100.

[0051] like Figure 3 and Figure 4As shown, the light-transmitting substrate 110 includes a plurality of first wirings 142 and a plurality of second wirings 144 on the main surface 110a on which the micro LED element 130 is mounted. The first wirings 142 and the second wirings 144 supply power to the micro LED elements 130R, 130G, and 130B. The first wirings 142 and the second wirings 144 are formed of a metal such as indium tin oxide (ITO), copper (Cu), etc. The first wirings 142 and the second wirings 144 are connected to the terminals 145 (described later) via wirings (not shown) arranged in the frame region 160.

[0052] The first wiring 142 is formed on the main surface 110a of the light-transmitting substrate 110. The first wiring 142 extends in the X direction and is arranged in the Y direction. The first wiring 142 is covered by the first insulating layer 146 and the second insulating layer 148. The first wiring 142 is connected to the cathode 134 of the micro LED element 130 via the through hole of the first insulating layer 146 and the second insulating layer 148.

[0053] Second wiring 144 is formed on first insulating layer 146. Second wiring 144 extends in the Y direction and is arranged in the X direction. Second wiring 144 is covered by second insulating layer 148. Second wiring 144 is connected to anode 136 of micro LED element 130 via a through hole of second insulating layer 148.

[0054] The first insulating layer 146 and the second insulating layer 148 are formed of silicon nitride (SiNx), silicon oxide (SiOx), etc. Figure 5 As shown, the first insulating layer 146 and the second insulating layer 148 are not formed in the transmissive region 124 .

[0055] like Figure 2 As shown, the terminal 145 is provided in a terminal region 162 located at the −X side end portion of the light-transmitting substrate 110 . Note that the terminal region 162 is a part of the frame region 160 .

[0056] The terminal 145 is a terminal for connecting the first wiring 142 and the second wiring 144 to the outside of the display panel 100. The phrase "outside the display panel 100" refers to a device, a member, a driving circuit, etc. other than the display panel 100. In the present embodiment, the terminal 145 is connected to the driver IC via a flexible printed circuit (FPC).

[0057] The seal 170 of the display panel 100 is disposed on the main surface 110a of the light-transmitting substrate 110. The seal 170 covers the micro LED element 130, the first wiring 142, the second wiring 144, the second insulating layer 148, etc., and protects these components. In one example, the seal 170 is formed of a light-transmitting resin.

[0058] The decoration member 200 of the display 50 is a light-transmitting member that provides a design to the viewer. Figure 1 As shown, the decoration member 200 is disposed on the display surface 100a side (+Z side) of the display panel 100 via the light-transmitting adhesive layer 52. In the present embodiment, the decoration member 200 transparently displays the display elements to be displayed on the display panel 100.

[0059] like Figure 6 and Figure 7 As shown, the decoration member 200 includes a display area 210 in a flat plate shape and a non-display area 220 surrounding the display area 210. Figure 1 As shown, the display area 210 overlaps the displayable area 120 of the display panel 100 and transparently displays the display elements to be displayed on the display panel 100. The non-display area 220 overlaps the frame area 160 of the display panel 100.

[0060] like Figure 7 As shown, the decorative member 200 includes a light-transmitting film 202 and a decorative layer 204. In one example, the light-transmitting film 202 is formed of a light-transmitting synthetic resin. The decorative layer 204 is a layer that provides a design to an observer. In one example, the decorative layer 204 is formed by printing a desired pattern (such as a wood grain appearance, a marble appearance, or a geometric pattern) in a desired color on the light-transmitting film 202. Hereinafter, an example in which the color of the design of the decorative member 200 (decorative layer 204) is dark brown is described.

[0061] Color Changer

[0062] The color changer 300 of the display device 10 emits illumination light of a predetermined color on the display panel 100 and the decoration member 200 (display 50) according to the color of the design of the decoration member 200 (decoration layer 204) to be presented to the observer. The color changer 300 can change the color of the design of the decoration member 200 to be presented to the observer by changing the color (wavelength region) of the illumination light emitted from the rear surface 50a side (-Z side) of the display 50 to the display panel 100 and the decoration member 200.

[0063] In this embodiment, the color changer 300 is implemented as an electrophoretic display panel, which includes a color filter and is driven by a thin film transistor (TFT). Figure 1As shown, the color changer 300 is arranged on the rear surface 50a side (-Z side) of the display 50. The color changer 300 is attached to the display panel 100 via the light-transmitting adhesive layer 62. The color changer 300 reflects the external light entering through the light-transmitting decorative member 200 and the transmission area 124 of each pixel 122 of the display panel 100. The color changer 300 changes the color of the light reflected toward the display panel 100 and the decorative member 200 to change the color of the illumination light emitted on the display panel 100 and the decorative member 200. Here, the term "external light" refers to light entering the display device 10 from the surroundings of the display device 10, including sunlight and illumination light.

[0064] like Figure 8 As shown, the color changer 300 includes an emission area 302 and a frame area 304 surrounding the emission area 302. The emission area 302 is an area that reflects external light toward the display panel 100 and the decoration member 200. Pixels 312R that reflect red light, pixels 312G that reflect green light, pixels 312B that reflect blue light, and pixels 312W that reflect white light are arranged in the emission area 302. The frame area 304 is an area that cannot reflect external light. Figure 1 As shown, the emission area 302 overlaps the displayable area 120 of the display panel 100 and the display area 210 of the decoration member 200, and the frame area 304 overlaps the frame area 160 of the display panel 100 and the non-display area 220 of the decoration member 200. Hereinafter, the pixels 312R, 312G, 312B, and 312W may be collectively referred to as "pixels 312".

[0065] like Figure 8 As shown, the pixel 312R, the pixel 312B, the pixel 312G and the pixel 312W are arranged in the +X direction to form a main pixel 314. The main pixel 314 is arranged in a matrix. In addition, the pixel 312R, the pixel 312B, the pixel 312G and the pixel 312W are arranged in a single row in the Y direction.

[0066] like Fig. 9 As shown, the color changer 300 includes a first substrate 320, a second substrate 340, and an electrophoretic layer 360. The first substrate 320 and the second substrate 340 sandwich the electrophoretic layer 360.

[0067] In one example, the first substrate 320 of the color changer 300 is implemented as a glass substrate. A pixel electrode 324 is provided on the main surface 320a of the electrophoretic layer 360 side of the first substrate 320. In addition, a TFT for selecting the pixel 312, a plurality of signal lines, a plurality of scan lines, etc. (none of which are shown in the figure) are provided on the main surface 320a of the first substrate 320. The signal line supplies a voltage to the pixel electrode 324 via the TFT, and the pixel electrode 324 applies a voltage to the electrophoretic layer 360. The scan line supplies a voltage to operate the TFT. The pixel 312 is surrounded by the signal line and the scan line, and the TFT is provided at the intersection between the scan line and the signal line.

[0068] As with the light-transmitting substrate 110 of the display panel 100, the terminal region 326 is disposed at the -X side end of the first substrate 320. A plurality of terminals 328 are arranged in the terminal region 326. The terminal 328 connects the signal line, the scan line and the counter electrode 344 of the second substrate 340 described later to the outside. In the present embodiment, the terminal 328 is connected to a driver IC not shown via an FPC. The terminal region 326 is a part of the frame region 304.

[0069] The second substrate 340 of the color changer 300 is opposite to the first substrate 320. The second substrate 340 is attached to the first substrate 320 through the sealing material 306. In one example, the second substrate 340 is implemented as a glass substrate. The color filter layer 342 is provided on the main surface 340a of the electrophoretic layer 360 side of the second substrate 340. In one example, the color filter layer 342 is implemented as a stripe color filter. The red color filter R, the green color filter G, the blue color filter B and the white color filter W of the color filter layer 342 correspond to the pixel 312R, the pixel 312B, the pixel 312G and the pixel 312W, respectively. In addition, the counter electrode 344 is provided on the main surface 340a of the second substrate 340.

[0070] like Fig.10 As shown, the electrophoretic layer 360 of the color changer 300 includes a plurality of microcapsules MC. Each microcapsule MC includes a dispersion medium 364, white particles 366, and black particles 368 in a shell 362. The shell 362 is formed of a light-transmitting resin (e.g., acrylic resin). The dispersion medium 364 is an alcohol solvent, a silicon solvent, etc. The white particles 366 are white particles with positive or negative charges, and are formed of titanium oxide (TiO2) in one example. The black particles 368 are black particles with opposite charges to the white particles 366, and are formed of carbon black in one example.

[0071] The white particles 366 and the black particles 368 of the microcapsule MC move toward the first substrate 320 side or the second substrate 340 side according to the voltage applied between the pixel electrode 324 of the first substrate 320 and the counter electrode 344 of the second substrate 340. Therefore, the color of the light reflected toward the display panel 100 and the decorative member 200 can be changed by controlling the voltage applied between the pixel electrode 324 and the counter electrode 344. For example, Fig.10 , the white particles 366 of the pixel 312R move to the second substrate 340 side, the black particles 368 of the pixels 312G and 312B move to the second substrate 340 side, and the white particles 366 and the black particles 368 of the pixel 312W are uniformly dispersed. In this case, red light is reflected by the pixel 312R, and white light is reflected by the pixel 312W. Therefore, red illumination light is emitted from the color changer 300 to the display panel 100 and the decorative member 200.

[0072] When the white particles 366 of the pixel 312R and the pixel 312G move to the second substrate 340 side and the black particles 368 of the pixel 312B move to the second substrate 340 side, yellow illumination light is emitted from the color changer 300 onto the display panel 100 and the decoration member 200. When the black particles 368 of the pixel 312R, the pixel 312G, the pixel 312B, and the pixel 312W move to the second substrate 340 side, external light is not reflected by the color changer 300, and illumination light is not emitted from the color changer 300 onto the display panel 100 and the decoration member 200.

[0073] The illumination light emitted from the color changer 300 onto the display panel 100 and the decoration member 200 enters the decoration member 200 through the transmission area 124 of each pixel 122 of the display panel 100. In the present embodiment, the color of the design of the decoration member 200 is dark brown, and thus, when red illumination light is emitted, the observer recognizes the color of the design of the decoration member 200 as reddish brown. Therefore, when the color of the design of the decoration member 200 presented to the observer is set to reddish brown, the color changer 300 emits red illumination light (illumination light of a predetermined color). In addition, when the color of the design of the decoration member 200 presented to the observer is set to yellowish brown, it is sufficient for the color changer 300 to emit yellow illumination light.

[0074] As described above, with the display device 10, the color changer 300 can easily change the color of the design presented to the observer by emitting illumination light of a predetermined color on the display panel 100 and the decoration member 200 according to the color of the design of the decoration member 200 to be presented to the observer. Note that when the color changer 300 does not emit illumination light to the decoration member 200, the observer recognizes the color of the design of the decoration member 200 as dark brown.

[0075] Controller

[0076] The controller 500 of the display device 10 controls the display panel 100 and the color changer 300. Fig.11 As shown, the controller 500 includes a display controller 520 and a color change controller 540 .

[0077] The display controller 520 of the controller 500 controls the display of the display panel 100 via the driver IC. The display controller 520 generates a display signal based on data representing a display element input from the outside, and sends the display signal to the driver IC. The display panel 100 displays the display element based on a signal (voltage) from the driver IC. The display controller 520 can set the color of the decorative member 200 passing through the display element (i.e., the color of the display element presented to the observer) to the complementary color of the color of the design of the decorative member 200 to be presented to the observer. For example, when the color of the design of the decorative member 200 to be presented to the observer is set to reddish brown (e.g., for RGB values, R: 102, G: 21, B: 24), the display controller 520 can set the color of the decorative member 200 passing through the display element to dark gray-blue-green (e.g., for RGB values, R: 21, G: 102, B: 99). As a result, the recognizability of the display element can be enhanced.

[0078] The color change controller 540 of the controller 500 controls the illumination light (light amount, color, etc.) emitted by the color changer 300 onto the display panel 100 and the decoration member 200 (display 50) via the driver IC based on a command from the outside. For example, when the color of the design of the decoration member 200 to be presented to the observer is set to dark brown, the color change controller 540 controls the voltage applied between the pixel electrode 324 and the counter electrode 344 of the color changer 300 via the driver IC, and moves the black particles 368 of the pixel 312R, the pixel 312G, the pixel 312B, and the pixel 312W to the second substrate 340 side. As a result, the color changer 300 does not emit illumination light onto the decoration member 200, and thus, the observer recognizes the color of the design of the decoration member 200 as dark brown. In addition, when the color of the design of the decoration member 200 to be presented to the observer is set to reddish brown, the color change controller 540 controls the voltage applied between the pixel electrode 324 and the counter electrode 344 of the color changer 300 and causes the color changer 300 to emit red illumination light.

[0079] The controller 500 is configured by a central processing unit (CPU), a memory, etc. In one example, the CPU executes a program stored in the memory to implement the functions of the controller 500 .

[0080] As described above, the color changer 300 emits a predetermined color of illumination light on the display panel 100 and the decoration member 200 according to the color of the design of the decoration member 200 to be presented to the observer, and thus, the display device 10 can easily change the color of the design to be presented to the observer. In addition, the controller 500 can enhance the recognizability of the display element of the display device 10 by setting the color of the decoration member 200 passing through the display element to the complementary color of the color of the design of the decoration member 200 to be presented to the observer.

[0081] Example 2

[0082] A configuration may be adopted in which the color changer 300 emits light on the non-display area 220 of the decoration member 200. Like the display device 10 of Embodiment 1, the display device 10 of this embodiment includes a display panel 100, a decoration member 200, a color changer 300, and a controller 500.

[0083] In this embodiment, if Fig.12 As shown, the decoration member 200 and the color changer 300 have an outer shape larger than that of the display panel 100. In addition, the emission area 302 of the color changer 300 overlaps the display area 210 and the non-display area 220 of the decoration member 200. Due to this configuration, the color changer 300 can emit illumination light on the display area 210 and the non-display area 220 of the decoration member 200. The other configurations of the display panel 100, the decoration member 200, the color changer 300, and the controller 500 of this embodiment are the same as those in Embodiment 1.

[0084] A configuration may be adopted in which the color changer 300 of the present embodiment emits illumination light of different colors on the display area 210 of the decoration member 200 and the non-display area 220 of the decoration member 200 based on the control of the color change controller 540 of the controller 500. This configuration makes it possible to increase the variation of the design to be presented to the observer.

[0085] A configuration may be adopted in which the color changer 300 of the present embodiment changes the color of the display element according to the area 121 (see FIG. 1 ) in the displayable area 120 of the display panel where the display element is not displayed, under the control of the color change controller 540 of the controller 500. Fig.13) to change the amount of illumination light emitted on the non-display area 220 of the decoration member 200. In one example, the color change controller 540 of the controller 500 controls the amount of illumination light emitted on the non-display area 220 of the decoration member 200 to an amount that matches the brightness of the area 121 where the display element is not displayed and the brightness of the non-display area 220 of the decoration member 200. This configuration makes it difficult to see the boundary between the displayable area 120 of the display panel 100 and the frame area 160 through the decoration member 200. Note that in Fig.13 In the figure, for easy understanding, a region 121 where no display element is displayed is illustrated as a hatched line.

[0086] Example 3

[0087] In Embodiment 1, the decoration member 200 is provided on the display surface 100a side (+Z side) of the display panel 100. However, a configuration may be adopted in which the decoration member 200 is provided on the rear surface 100b side of the display panel 100.

[0088] Like the display device 10 of Embodiment 1, the display device 10 of this embodiment includes a display panel 100, a decoration member 200, a color changer 300, and a controller 500. Fig.14 As shown, the decoration member 200 is disposed on the rear surface 100b side (-Z side) of the display panel 100 via the light-transmitting adhesive layer 52. The other configurations of the display panel 100, the decoration member 200, the color changer 300 and the controller 500 of this embodiment are the same as those in Embodiment 1.

[0089] In the present embodiment, the illumination light emitted from the color changer 300 to the display panel 100 and the decoration member 200 passes through the light-transmitting decoration member 200, then passes through the transmission area 124 of each pixel 122 of the display panel 100, and is emitted from the display panel 100 (display 50). That is, the display panel 100 of the present embodiment transparently displays the design of the decoration member 200.

[0090] As in Embodiment 1, in this embodiment, the color changer 300 also emits illumination light of a predetermined color on the display panel 100 and the decorative member 200 according to the color of the design of the decorative member 200 to be presented to the observer, whereby the display device 10 can easily change the color of the design to be presented to the observer. In addition, the display panel 100 is placed closer to the observer side (+Z side) than the decorative member 200, and thus, the display device 10 of this embodiment can display the display elements more clearly.

[0091] Example 4

[0092] In Embodiments 1 to 3, micro LED elements 130R, 130G, and 130B are arranged as light emitting elements in the pixel display region 126 of each pixel 122 of the display panel 100. However, a configuration in which other light emitting elements are arranged in the pixel display region 126 may be adopted.

[0093] Like the display device 10 of Embodiment 1, the display device 10 of this embodiment includes a display panel 100, a decoration member 200, a color changer 300, and a controller 500. The display panel 100 of this embodiment is implemented as an organic light emitting diode (OLED) display panel driven by TFT. The configurations of the decoration member 200, the color changer 300, and the controller 500 in this embodiment are the same as those in Embodiment 1, and thus, the display panel 100 of this embodiment is described.

[0094] First, the overall configuration of the display panel 100 of this embodiment is described. Fig.15 As shown, the display panel 100 of the present embodiment includes a TFT substrate 600 , a driver IC 740 , and a sealing substrate 760 . The TFT substrate 600 includes a light-transmitting substrate 610 and a driver circuit 720 .

[0095] The light-transmitting substrate 610 of the TFT substrate 600 includes a displayable area 620 and a frame area 690 surrounding the displayable area 620. The displayable area 620 is an area capable of displaying display elements. The driver circuit 720 of the TFT substrate 600 is disposed in the frame area 690 of the light-transmitting substrate 610.

[0096] In one example, the light-transmitting substrate 610 is implemented as a glass substrate. A plurality of pixels 622R, 622B, 622G are arranged in a displayable area 620 of the light-transmitting substrate 610. Hereinafter, the pixels 622R, 622B, and 622G may be collectively referred to as "pixels 622".

[0097] The pixel 622R, the pixel 622B, and the pixel 622G are arranged in the +X direction to form one main pixel 628. The main pixel 628 is arranged in a matrix. The pixel 622R, the pixel 622B, and the pixel 622G are also arranged in a single row in the Y direction, respectively.

[0098] like Fig.16 As shown, like the pixel 122 of Example 1, each pixel 622 includes a transmission area 624 and a pixel display area 626. Like the transmission area 124 of Example 1, the transmission area 624 is an area that transmits light. Nothing is formed on the transmission area 624 of the light-transmitting substrate 610. The pixel display area 626 is an area that emits display light for displaying display elements.

[0099] An organic light emitting diode 642, a pixel circuit 640 to be described later that controls light emission of the organic light emitting diode 642, and the like are provided in the pixel display region 626. The organic light emitting diode 642 of the pixel 622R emits red light. The organic light emitting diode 642 of the pixel 622G emits green light. The organic light emitting diode 642 of the pixel 622B emits blue light.

[0100] Return to Fig.15 The driver circuit 720 drives the pixel circuit 640 provided in the pixel display area 626 of each pixel 622 via the gate lines 631, 633, the data line (Vdata) 635, the power line (Vdd) 636, the reference voltage supply line (Vref) 637, and the cathode line 638. The gate lines 631, 633, the data line 635, the power line (Vdd) 636, etc. are formed on the light-transmitting substrate 610.

[0101] The driver IC 740 is provided on the -X side end portion (frame region 690) of the light-transmitting substrate 610. The driver IC 740 supplies power, timing signals, and the like to the driver circuit 720. The driver IC 740 is connected to the controller 500 via an FPC.

[0102] The sealing substrate 760 is a light-transmitting substrate and is bonded to the TFT substrate 600 through glass frit to seal the displayable region 620 of the TFT substrate 600. In one example, dry air is enclosed between the sealing substrate 760 and the TFT substrate 600.

[0103] Next, the pixel circuit 640 and the organic light emitting diode 642 are described. The pixel circuit 640 is provided in the pixel display region 626 of each pixel 622, and controls the light emission of the organic light emitting diode 642. The pixel circuit 640 is connected to the driver circuit 720 via gate lines 631, 633, a data line (Vdata) 635, a power line (Vdd) 636, a reference voltage supply line (Vref) 637, and a cathode line 638.

[0104] like Fig.17 As shown, the pixel circuit 640 includes a switching TFT 651, a driving TFT 652, a reset TFT 653, and a holding capacitor C1. The switching TFT 651, the driving TFT 652, and the reset TFT 653 are used as thin film transistors for controlling the light emission of the organic light emitting diode 642. Hereinafter, the switching TFT 651, the driving TFT 652, and the reset TFT 653 may be collectively referred to as "pixel TFT 650".

[0105] The switching TFT 651 is a transistor for selecting the pixel 622. The gate of the switching TFT 651 is connected to the gate line 631 serving as a scanning line. The source of the switching TFT 651 is connected to the data line (Vdata) 635. The drain of the switching TFT 651 is connected to the gate of the driving TFT 652.

[0106] The driving TFT 652 is a transistor that drives the organic light emitting diode 642. The gate of the driving TFT 652 is connected to the drain of the switching TFT 651. The source of the driving TFT 652 is connected to the power supply line (Vdd) 636. The drain of the driving TFT 652 is connected to the anode of the organic light emitting diode 642. Note that the cathode of the organic light emitting diode 642 is connected to the cathode line 638.

[0107] The holding capacitor C1 is formed between the anode of the organic light emitting diode 642 and the gate of the driving TFT 652 .

[0108] In one example, the reset TFT 653 is used to apply a voltage less than or equal to a threshold voltage of the organic light emitting diode 642 to the anode of the organic light emitting diode 642. By applying a voltage less than or equal to the threshold voltage of the organic light emitting diode 642 to the anode of the organic light emitting diode 642, crosstalk caused by a leakage current of the organic light emitting diode 642 can be suppressed. The gate of the reset TFT 653 is connected to the gate line 633. The source of the reset TFT 653 is connected to the reference voltage supply line (Vref) 637. The drain of the reset TFT 653 is connected to the anode of the organic light emitting diode 642.

[0109] Next, the operation of the pixel circuit 640 is described. First, the driver circuit 720 outputs a selection signal to the gate line 631, thereby setting the switching TFT 651 to an off state. When the switching TFT 651 takes the off state, the data voltage supplied via the data line (Vdata) 635 is held by the holding capacitor C1. Based on the voltage held by the holding capacitor C1, the off / on state of the driving TFT 652 changes, and a current corresponding to the grayscale of the organic light emitting diode 642 is supplied from the power supply line (Vdd) 636 to the organic light emitting diode 642.

[0110] Then, the organic light emitting diode 642 provided in each pixel 622 emits light, and a color image is displayed in the displayable area 620. The reset TFT 653 is in an off state before a light emission period in which the organic light emitting diode 642 emits light. When the reset TFT 653 takes the off state, a voltage less than or equal to the threshold voltage of the organic light emitting diode 642 is applied from the reference voltage supply line (Vref) 637 to the anode of the organic light emitting diode 642. As a result, the potential of the anode of the organic light emitting diode 642 is reset.

[0111] like Fig.18 As shown, the organic light emitting diode 642 includes an anode 645, a light emitting layer 646 and a cathode 647. In one example, the anode 645 is formed of three layers, namely, ITO, an aluminum alloy or a silver alloy, and ITO. In one example, the light emitting layer 646 is formed of a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer and an electron injection layer. The cathode 647 is formed of lithium (Li), aluminum, magnesium (Mg), ytterbium (Yb), their alloys, etc.

[0112] The anode 645 is connected to the drain of the reset TFT 653. The cathode 647 is connected to the cathode line 638.

[0113] Also in the present embodiment, each pixel 622 of the display panel 100 includes a transmissive region 624 that transmits light. Thus, the illumination light emitted from the color changer 300 onto the display panel 100 and the decorative member 200 passes through the transmissive region 624 of each pixel 622 of the display panel 100 and enters the decorative member 200. Therefore, for the display device 10 of the present embodiment, the color changer 300 can also easily change the color of the design presented to the observer by emitting illumination light of a predetermined color onto the display panel 100 and the decorative member 200 according to the color of the design of the decorative member 200 to be presented to the observer.

[0114] Example 5

[0115] In Embodiment 1, the color changer 300 emits monochromatic (red, yellow, etc.) illumination light onto the display panel 100 and the decoration member 200. However, a configuration may be adopted in which the color changer 300 changes the color, brightness, etc. of the illumination light according to the position within the displayable area 120 of the display panel 100 or the position within the decoration member 200.

[0116] Like the display device 10 of Embodiment 1, the display device 10 of this embodiment includes a display panel 100, a decoration member 200, a color changer 300, and a controller 500. The configurations of the display panel 100, the decoration member 200, and the color changer 300 of this embodiment are the same as those of Embodiment 1, and thus, the controller 500 of this embodiment and examples of illumination light and display are described.

[0117] Like the controller 500 of Embodiment 1, the controller 500 of this embodiment includes a display controller 520 and a color change controller 540. The configuration of the display controller 520 of this embodiment is the same as that of the display controller 520 of Embodiment 1. Therefore, the color change controller 540 of this embodiment is described here.

[0118] The color change controller 540 of this embodiment generates a scan signal, a grayscale signal and a control signal including a synchronization signal based on illumination data representing the pattern of illumination light input from the outside. In one example, the illumination data includes the pattern of illumination light, the relationship between the grayscale of the pattern and the color, etc.

[0119] The color change controller 540 of this embodiment sequentially outputs a scan signal to each scan line of the color changer 300 based on the control signal. In addition, the color change controller 540 of this embodiment converts a grayscale signal into a data voltage based on the control signal and outputs the data voltage to each signal line of the color changer 300.

[0120] In the present embodiment, each electrophoretic layer 360 (each microcapsule MC) of the pixel 312 of the color changer 300 is driven by the potential difference between the data voltage applied to the pixel electrode 324 and the voltage of the counter electrode 344. Therefore, the color changer 300 of the present embodiment can change the pattern of the illumination light reflected toward the display panel 100 and the decoration member 200, the color and grayscale of the pattern, etc. according to the illumination data.

[0121] For example, Fig.19 As shown, the color changer 300 of the present embodiment can emit illumination light whose color gradually becomes lighter from the center of the displayable area 120 of the display panel 100 (the emission area 302 of the color changer 300) toward the periphery (i.e., illumination light whose brightness gradually decreases from the center of the displayable area 120 of the display panel 100 toward the periphery) toward the display panel 100 and the decoration member 200. As a result, as shown in FIG. Fig. 20 As shown, the display device 10 displays an image in which the background color of the display element and the background color of the periphery of the display element are dark and the background color of the periphery of the display area 210 is bright. Since the background color of the display element and the background color of the periphery of the display element are dark, and the background color of the periphery of the display area 210 is bright, the display device 10 can make it easier for the observer to see the display element. In addition, the display device 10 can give a sense of luxury to the display.

[0122] Example 6

[0123] In Embodiment 1, the color changer 300 is an active matrix driven by TFT. However, a configuration may be adopted in which the color changer 300 is not driven by an active matrix.

[0124] Like the display device 10 of Embodiment 1, the display device 10 of this embodiment includes a display panel 100, a decoration member 200, a color changer 300, and a controller 500. The configuration of the display device 10 of this embodiment is the same as that of the display device 10 of Embodiment 1 except for the configuration of the signal lines 329R, 329G, 329B, and 329W and the pixel electrode 324 of the color changer 300, and the color change controller 540 of the controller 500. Therefore, the signal lines 329R, 329G, 329B, and 329W and the pixel electrode 324 of the color changer 300, and the color change controller 540 are described here. Note that the signal lines 329R, 329G, 329B, and 329W are collectively referred to as "signal lines 329".

[0125] Like the signal line of the color changer 300 of Embodiment 1, the signal line 329 of the color changer 300 of this embodiment is provided on the main surface 320a of the first substrate 320 of the color changer 300. The signal line 329 connects the pixel electrode 324 of each pixel 312 and the color change controller 540 to each other via the terminal 328.

[0126] Specifically, Fig.21 As shown, signal line 329R connects pixel electrodes 324 of all pixels 312R. Signal line 329G connects pixel electrodes 324 of all pixels 312G. Signal line 329B connects pixel electrodes 324 of all pixels 312B. Signal line 329W connects pixel electrodes 324 of all pixels 312W. Signal lines 329R, 329G, 329B and 329W are each connected to color change controller 540 via terminal 328.

[0127] The pixel electrode 324 of the pixel 312 of this embodiment is directly connected to the signal line 329 .

[0128] The color change controller 540 of the present embodiment supplies a grayscale voltage (data voltage) to each of the pixels 312R, 312G, 312B, and 312W via the signal line 329 based on a command from the outside. Thus, the color changer 300 of the present embodiment reflects illumination light of uniform color onto the entire surface of the emission region 302 toward the display panel 100 and the decoration member 200.

[0129] In the present embodiment, there is no need to provide a TFT in the color changer 300, and the display device 10 can easily change the color of a design to be presented to an observer with a simple configuration.

[0130] Modify the example

[0131] The embodiments have been described, but various modifications may be made to the present disclosure without departing from the spirit and scope of the present disclosure.

[0132] For example, like the display panel 100 of Embodiment 4, a configuration may be adopted in which the display panel 100 of Embodiment 1 (micro LED display panel) is driven by TFT.

[0133] The display panel 100 is not limited to a display panel including a light emitting element. For example, a configuration in which the display panel 100 is implemented as a liquid crystal display panel including a transmissive region in a pixel may be adopted.

[0134] The color changer 300 is not limited to the electrophoretic display panel. A configuration in which the color changer 300 is implemented as a micro LED display panel, an OLED display panel, a liquid crystal display panel, etc. may be adopted. In addition, a configuration in which the color changer 300 is implemented as a backlight device including an LED element emitting red light, an LED element emitting green light, an LED element emitting blue light, and a light guide plate may be adopted.

[0135] like Fig. 22 As shown, a configuration may be adopted in which the micro LED element 130 of the display panel 100 includes a light shielding film 138 that covers the light-emitting side surface of the micro LED chip 132. The light shielding film 138 blocks the emitted light from the micro LED chip 132. Thus, the color mixing of the display light of the display panel 100 and the light emitted from the color changer 300 can be suppressed, and a design of a desired color can be presented to the observer.

[0136] like Fig.23 As shown, a configuration may be adopted in which a micro LED element 130R emitting red display light, a micro LED element 130G emitting green display light, and a micro LED element 130B emitting blue display light are arranged in the pixel display region 126 of one pixel 122 of the display panel 100. This configuration makes it possible to increase the area of ​​the transmission region 124 of each pixel 122 and increase the brightness of the color of the design of the decorative member 200.

[0137] like Fig.24 As shown, a configuration may be adopted in which the light-transmitting substrate 110 of the display panel 100 includes a light-shielding layer 112 in a region where the micro LED element 130 is mounted. The light-shielding layer 112 blocks the display light from the micro LED element 130 and the light emitted from the color changer 300. Thus, the color mixing of the display light of the display panel 100 and the light emitted from the color changer 300 can be suppressed, and a design of a desired color can be presented to the observer. Note that in Fig.24 In the embodiment, the light shielding layer 112 is formed on the main surface 110 a of the light-transmitting substrate 110 and is covered by the third insulating layer 149 .

[0138] like Fig.25 As shown, a configuration may be adopted in which the second wiring 144 of the light-transmitting substrate 110 of the display panel 100 is covered by a light-shielding layer 114 provided on the observer side (+Z side). The light-shielding layer 114 is provided on the second insulating layer 148 and blocks external light. Due to this configuration, glare due to reflection of the second wiring 144 can be suppressed. As with the second wiring 144, a configuration may be adopted in which the first wiring 142 of the light-transmitting substrate 110 of the display panel 100 is also covered by a light-shielding layer provided on the observer side (+Z side).

[0139] like Figure 1 As shown, it is preferred that, when viewed in a plan view, the terminal region 162 of the display panel 100 overlaps with the terminal region 326 of the color changer 300. Due to this configuration, the size of the terminal regions 162, 326 recognized by an observer can be reduced.

[0140] like Fig.26 As shown, a configuration may be adopted in which the decoration member 200 includes a light shielding member 206 that blocks external light in an area where the terminal area 162 of the display panel 100 overlaps with the terminal area 326 of the color changer 300. This configuration makes it difficult to see the boundary between the displayable area 120 and the frame area 160 of the display panel 100 through the decoration member 200. The light shielding member 206 is a metal design that reflects external light, a black design that absorbs external light, or the like.

[0141] In Embodiment 5, the color changer 300 emits illumination light whose color gradually becomes lighter from the center to the periphery of the displayable area 120 of the display panel 100 toward the display panel 100 and the decoration member 200. However, a configuration may be adopted in which the color changer 300 emits illumination light whose color is different for the center of the displayable area 120 and the periphery of the displayable area 120 toward the display panel 100 and the decoration member 200. Due to this configuration, the display device 10 can make it easier for an observer to see the display elements.

[0142] Some example embodiments have been described above for purposes of illustration. Although specific embodiments have been given in the above discussion, those skilled in the art will recognize that changes may be made in form and detail without departing from the broader spirit and scope of the present invention. Therefore, the description and drawings are to be regarded as illustrative rather than restrictive. Therefore, this detailed description should not be taken in a restrictive sense, and the scope of the present invention is limited only by the claims included therein and the full scope of equivalents to which such claims are entitled.

Claims

1. A display device, comprising: A display including a display panel in which a plurality of pixels are arranged and a decoration member arranged on one of a display surface side and a rear surface side of the display panel; as well as a color changer that emits illumination light onto the display panel and the decoration member from the rear surface side of the display, wherein Each of the plurality of pixels includes a pixel display region that emits display light and a transmission region that transmits light, and The color changer emits the illumination light of a predetermined color onto the display panel and the decoration member according to the color of the design of the decoration member to be presented to an observer.

2. The display device according to claim 1, wherein: The decoration member is arranged on the display surface side of the display panel, and transparently displays a display element to be displayed on the display panel.

3. The display device according to claim 2, further comprising: a controller that controls the color of the display element to be displayed on the display panel, wherein The controller controls the color of the display element passing through the decoration member to be a complementary color of a design color of the decoration member to be presented to an observer.

4. The display device according to claim 2, further comprising: a controller that controls the amount of illumination light emitted by the color changer onto the display panel and the decorative member, wherein The display panel includes a displayable area in which the plurality of pixels are arranged and in which the display elements are displayed, and a frame area surrounding the displayable area, The decoration member includes a display area overlapping with the displayable area of ​​the display panel when viewed in a plan view, and a non-display area overlapping with the frame area of ​​the display panel, and The controller controls the amount of the illumination light emitted by the color changer on the non-display area of ​​the decoration member according to the brightness of an area of ​​the displayable area of ​​the display panel where the display element is not displayed, which passes through the decoration member.

5. The display device according to claim 2, wherein Each of the display panel and the color changer includes a terminal region in which a terminal connected to the outside is arranged, The decoration member includes a light shielding member that blocks external light, and When viewed in a plan view, the terminal region of the display panel, the terminal region of the color changer, and a light shielding member of the decoration member overlap.

6. The display device according to claim 1, wherein: The display panel includes a light-transmitting substrate in which the plurality of pixels are arranged, and the display panel includes wirings driving the plurality of pixels.

7. The display device according to claim 6, wherein: Each of the plurality of pixels includes a light emitting element located in the pixel display region.

8. The display device according to claim 7, wherein: The light emitting element is a micro LED element.

9. The display device according to claim 8, wherein: The micro LED element includes an LED chip that emits light, an electrode connected to the wiring, and a light shielding film that covers a side surface of the LED chip.

10. The display device according to claim 8, wherein: The light-transmitting substrate includes a light-shielding layer in a region where the micro LED element is mounted.

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