TWI648726B - Display device - Google Patents

Abstract

A display device includes a first display panel and a second display panel. The first display panel includes a plurality of first pixels arranged in an array. The second display panel and the first display panel are stacked one on top of the other, and the second display panel includes a plurality of second pixels arranged in an array, wherein the brightness of the first display panel independently presented when all the first pixels are turned on in the maximum bright state. Different from the brightness independently presented by the second display panel when the second pixels are all turned on in the maximum bright state.

Description

Display device

The present invention relates to a display device, and more particularly to a display device having a multi-layer display panel.

In recent years, due to the continuous development of display technology, many electronic devices such as automotive dashboards, watches, and game consoles have been transformed from early mechanical physical structures to flat digital display devices to provide users with Get personalized information from your display device. However, the flat digital display device cannot truly present the three-dimensional feeling of the traditional mechanical solid structure. With the popularization and diversification of stereoscopic display technology, various stereoscopic display devices that currently provide users with a multi-dimensional display information of a flat digital display device and a stereoscopic visual effect of a realistic mechanical solid structure are springing up like mushrooms. Emerging.

The current rendering methods of stereoscopic display technology can be divided into volumetric (Volumetric), integral imaging (Integral imaging), parallax barrier (Parallax barrier), and multi-layer (Multi-layer) technologies. Among them, the multi-layer display technology is compared with In terms of other stereoscopic display technologies, it has better resolution, contrast, depth of field, layering, and can provide excellent stereoscopic display effects in a limited space. Of course However, compared with a single-layer display device, the display brightness may be attenuated due to the light source having to penetrate more layers of display panels, and the pixel contours of the display panels in the multi-layer display device may be parallel to each other and Each is arranged in a periodic manner so that the moiré effect is more pronounced. In the prior art, a haze diffusion sheet is added between two layers of display panels stacked one above the other to blur the moire phenomenon to reduce the moire problem. However, this way of diffusing the sheet will reduce the brightness performance and image clarity of the display device, and will also increase the manufacturing cost and overall thickness of the display device.

The invention provides a display panel, which can effectively improve the overall brightness performance and display quality of a display device.

The display device of the present invention includes a first display panel and a second display panel. The first display panel includes a plurality of first pixels arranged in an array. The second display panel and the first display panel are stacked one on top of the other, and the second display panel includes a plurality of second pixels arranged in an array, wherein the brightness of the first display panel independently presented when all the first pixels are turned on in the maximum bright state. Different from the brightness independently presented by the second display panel when the second pixels are all turned on in the maximum bright state.

In an embodiment of the present invention, the aperture ratio of the first pixel is different from the aperture ratio of the second pixel.

In an embodiment of the present invention, the resolution of the first display panel is different from the resolution of the second display panel.

In an embodiment of the present invention, one of the first display panel and the second display panel is a transflective display panel, and the other is a transmissive display panel.

In an embodiment of the present invention, the first display panel and the second display panel are both liquid crystal display panels, and the liquid crystal material characteristics of the first display panel are different from those of the second display panel.

In an embodiment of the present invention, each of the first pixels of the first display panel includes a plurality of first sub-pixels, and the first sub-pixels have N colors, where N is a positive integer.

In an embodiment of the present invention, the second pixels of the second display panel respectively include a plurality of second sub-pixels, and the second sub-pixels have M colors, where M is a positive integer.

In an embodiment of the present invention, the second pixels of the second display panel further include at least one white sub-pixel.

In an embodiment of the present invention, each of the second sub-pixels of the different colors has a different area.

In an embodiment of the invention, the aforementioned N is not equal to M.

In an embodiment of the present invention, each of the second pixels of the second display panel includes at least one white sub-pixel.

In an embodiment of the present invention, each of the first pixels has a first outline, each of the second pixels has a second outline, and the sides of the first outline are not parallel to the sides of the second outline.

In an embodiment of the present invention, the sides of the first contour and the sides of the second contour intersect at an angle, and the angle is 30 degrees to 60 degrees.

In an embodiment of the present invention, the first display panel further includes a plurality of first display signal lines, wherein each of the first display signal lines is bent.

In an embodiment of the present invention, the second display panel further includes a plurality of second display signal lines, wherein the second display signal lines are each bent.

The display device of the present invention includes a first display panel and a second display panel. The first display panel includes a plurality of first pixels arranged in an array. The second display panel is stacked on top of the first display panel, and the second display panel includes a plurality of second pixels arranged in an array, wherein the aperture ratio of the first pixel is different from the aperture ratio of the second pixel.

In an embodiment of the present invention, the second pixels of the second display panel respectively include a plurality of second sub pixels, and some of the second sub pixels have different sizes.

In an embodiment of the present invention, the first pixels of the first display panel include a plurality of first sub-pixels, and the first sub-pixels have the same size.

In an embodiment of the present invention, the first sub-pixels are all transmissive display pixels.

In an embodiment of the present invention, at least one of the second sub-pixels is a transflective display pixel.

In an embodiment of the present invention, the above-mentioned first pixel includes first sub-pixels of N colors, the second pixel includes second sub-pixels of M colors, and N and M are positive integers.

In an embodiment of the present invention, the N is different from M.

The display device of the present invention includes a first display panel and a second display panel. The first display panel includes a plurality of first pixels and a plurality of first display signal lines that transmit signals to the first pixels. The second display panel is stacked on top of the first display panel, and the second display panel includes a plurality of second pixels and a plurality of second display signal lines that transmit signals to the second pixels. The trace of each first display signal line has a first extension direction, and the trace of each second display signal line has a second extension direction. The first extension direction is not parallel and perpendicular to the second extension direction.

In an embodiment of the present invention, an angle at which the first extending direction and the second extending direction intersect with each other is 30 to 60 degrees.

In an embodiment of the present invention, each of the second display signal lines is bent.

In an embodiment of the present invention, each of the first display signal lines is linear.

In an embodiment of the present invention, the display device further includes a first polarizer and a second polarizer. The first display panel and the second display panel are located between the first polarizer and the second polarizer.

In an embodiment of the present invention, the display light passing through one of the first display panel and the second display panel has a polarization state, and the display light enters the other of the first display panel and the second display panel while maintaining the polarization state.

In an embodiment of the present invention, there is no polarizer between the first display panel and the second display panel.

Based on the above, since the display panel of the present invention includes a first A display panel and a second display panel, and the first display panel includes the first pixels arranged in an array; the second display panel includes the second pixels arranged in an array; The brightness independently presented by a display panel is different from the brightness independently presented by the second display panel when the second pixels are all turned on in the maximum bright state. Thereby, the display brightness performance and display quality of the display device can be effectively improved.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200‧‧‧ display devices

110, 210, 310, 410, 510, 610, 710, 810, 910, 1010, 1110, 1210‧‧‧ first display panel

120, 220, 320, 420, 520, 620, 720, 820, 920, 1020, 1120, 1220‧‧‧ second display panel

112, 212, 312, 412, 414, 512, 612, 712, 812, 912, 1012, 1112‧‧‧ first pixel

122, 222, 224, 322, 324, 422, 424, 522, 622, 624, 722, 822, 922, 924, 1022, 1122 ‧ ‧ second pixel

112a, 112b, 112c, 212a, 212b, 212c, 312a, 312b, 312c, 412a, 412b, 412c, 412d, 414a, 414b, 414c, 414d, 512a, 512b, 512c, 612a, 612b, 612c, 712a, 712b, 712c, 812a, 812b, 812c, 912a, 912b, 912c, 1012a, 1012b, 1012c, 1112a, 1112b, 1112c

1111‧‧‧First contour

1121‧‧‧Second Outline

122a, 122b, 122c, 122d, 222a, 222b, 222c, 222d, 224a, 224b, 224c, 224d, 322a, 322b, 322c, 322d, 324a, 324b, 324c, 324d, 422a, 422b, 422c, 422d, 424a, 424b, 424c, 424d, 522a, 522b, 522c, 622a, 622b, 622c, 624a, 624b, 624c, 722a, 722b, 722c, 722d, 1022a, 1022b, 1022c, 1022d, 1122a, 1122b, 1122c ‧ ‧ second sub pixel

1022d (T) ‧‧‧ Penetration zone

522e, 622e, 624e, 1022d (R) ‧‧‧Reflection zone

1116‧‧‧The first display signal line

1126‧‧‧Second display signal line

1230‧‧‧First polarizer

1232, 1242‧‧‧ Direction of light absorption axis

1240‧‧‧Second Polarizer

1250‧‧‧Display light

1250’‧‧‧ backlight

1252, 1254‧‧‧ Display light

D1‧‧‧First extension direction

D2‧‧‧Second extension direction

FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention.

2 to 10 are schematic diagrams of display devices according to different embodiments of the present invention.

FIG. 11A is a schematic diagram of a display device according to another embodiment of the present invention.

FIG. 11B is a schematic top view of the wiring of the display device of FIG. 11A.

FIG. 12 is a schematic diagram of a display device according to another embodiment of the present invention.

FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention. Referring to FIG. 1, the display device 100 of this embodiment includes a first display panel 110 and a second display panel 120. The second display panel 120 and the first display panel 110 are stacked on top of each other, and in order to clearly illustrate the design of the display device 100, FIG. 1 presents a schematic diagram of the first display panel 110 and the second display panel 120 separated from each other. In actual structure, the first A display panel 110 and a second display panel 120 may be closely stacked together and attached to each other by an adhesive material or assembled by a structure such as a frame. The first display panel 110 includes a plurality of first pixels 112 arranged in an array. The second display panel 120 includes a plurality of second pixels 122 arranged in an array. Here, the first display panel 110 and the second display panel 120 may both be liquid crystal display panels. In some embodiments, the liquid crystal material characteristics of the first display panel 110 may be different from the liquid crystal material characteristics of the second display panel 120, but is not limited thereto. In addition, this embodiment only schematically shows a first display panel 110 and a second display panel 120. However, in other embodiments not shown, additional ones stacked on top of each other can be added according to the actual needs of the display device. The number of the first display panel and the second display panel is not limited herein.

Specifically, in this embodiment, each first pixel 112 of the first display panel 110 includes three first sub-pixels 112a, 112b, and 112c, and the first sub-pixel 112a, 112b, and 112c have The same size, and the first sub-pixels 112a, 112b, 112c are all transmissive display pixels. Here, the first display panel 110 may be, for example, a display panel of an RGB color array, that is, the first sub-pixels 112a, 112b, and 112c of the first pixel 112 may be composed of red, green, and blue sub-pixels, respectively. Made up. That is, among the first pixels 112 of the first display panel 110, the first sub-pixels 112a, 112b, and 112c that are sequentially arranged along the same column direction are red, green, and blue, respectively, so that the display device 100 can display Full color picture. However, in other embodiments not shown, the first sub-pixels 112a, 112b, and 112c arranged in order along the same column direction may not be arranged in the order of red, green, and blue, so that the first sub-pixels 112a, 112a, 112b, 112c There are different permutations and combinations, which are not limited here.

Each second pixel 122 of the second display panel 120 includes four second sub-pixels 122a, 122b, 122c, 122d, and each second sub-pixel 122a, 122b, 122c, 122d has the same size. And the second sub-pixels 122a, 122b, 122c, and 122d are all through-display pixels. Here, the second display panel 120 may be, for example, a RGBW array display panel, that is, the second sub-pixels 122a, 122b, 122c, and 122d of the second pixel 122 may be red, green, blue, Made up of white sub pixels. Each second pixel 122 of the second display panel 120 includes at least one white sub-pixel to increase the transmittance of the second display panel 120 and increase the display brightness.

The first display panel 110 and the second display panel 120 are stacked on top of each other so that each first pixel 112 of the first display panel 110 and each second pixel 122 of the second display panel 120 correspond to each other. Here, each first pixel 112 of the first display panel 110 and each second pixel 122 of the second display panel 120 may have the same size. However, the number of each first pixel 112 may be three first sub-pixels 112a, 112b, 112c, and the number of each second pixel 122 may be four second sub-pixels 122a, 122b, 122c. , 122d, so the aperture ratio of the first pixel 112 is different from the aperture ratio of the second pixel 122, but it is not limited thereto. Here, the first sub-pixel 112a of this embodiment corresponds to the second sub-pixels 122a, 122b, and the first sub-pixel 112b corresponds to the second sub-pixel 122b, 122c, and the first sub-pixel 112c corresponds to To the second sub-pixel 122c, 122d. That is, each of the first sub-pixels 112a, 112b, and 112c corresponds to two of the second sub-pixels 122a, 122b, 122c, and 122d, but is not limited thereto.

Therefore, when both the first pixel 112 and the second pixel 122 are turned on in the maximum bright state, the brightness independently presented by the first display panel 110 is different from the brightness independently presented by the second display panel 120. Here, the brightness independently presented by the first display panel 110 and the brightness independently presented by the second display panel 120 are such that the light source (not shown) incident on the first display panel 110 is the same as the light source incident on the second display panel 120 ( (Not shown). In other words, the so-called independently presented brightness refers to the state where the first display panel 110 and the second display panel 120 are separated from each other, and the first display panel 110 and the second display panel 120 are respectively measured under a selected light source. To the brightness. In other embodiments not shown, the aperture ratio of the first pixel and the aperture ratio of the second pixel can also be adjusted and set by adjusting the line width of the circuit wiring or setting the black matrix according to the actual design requirements. The position of the layer increases or decreases the aperture ratio of the pixels to provide that the first pixels of the first display panel and the second pixels of the second display panel have the same aperture ratio.

For example, if the opening area of each of the first sub-pixel 112a, 112b, 112c and the second sub-pixel 122a, 122b, 122c, 122d is A, then the opening area of the first pixel 112 It is 3A and the opening area of the second pixel 122 is 4A. If the display area area of the first display panel 110 and the second display panel 120 is B, the aperture ratio occupied by the first pixel 112 (the opening area of a single pixel over the entire display area area) is 3A / B and the second image The aperture ratio occupied by the element 122 is 4A / B. Therefore, the pixel aperture ratios of the first display panel 110 and the second display panel 120 may be different. However, the aperture ratio of each of the first sub-pixel 112a, 112b, 112c and the second sub-pixel 122a, 122b, 122c, 122d is A / B. Therefore, the first display panel 110 and the second display panel 110 The sub-pixel aperture ratio of the display panel 120 may be the same.

In other embodiments, the opening area of each of the first sub-pixels 112a, 112b, and 112c may be A1, and that of each of the second sub-pixels 122a, 122b, 122c, and 122d. The opening area may be A2, and A1 is different from A2. At this time, the first display panel 110 and the second display panel 120 may have the same number of sub pixels, so the resolutions of the first display panel 110 and the second display panel 120 are the same. However, because the design of the sub-pixel opening area is different, the sub-pixel opening ratios of the first display panel 110 and the second display panel 120 may be different.

In addition, since display images such as car dashboards, watches, and game consoles do not need to achieve photo-like effects in color expression, multi-layer displays do not require the pixels of each layer of the display panel to be highly Color performance. Therefore, the pixel configuration of some display panels can be adaptively adjusted according to different needs, so as to achieve better visual effects and display quality than single-layer display devices. For example, in order to improve the overall display brightness, as in this embodiment, a second display panel 120 having a white sub-pixel may be used.

It must be noted here that the following embodiments use the component numbers and parts of the foregoing embodiments, in which the same reference numerals are used to indicate the same or similar components, and the description of the same technical content is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments are not repeatedly described in detail.

FIG. 2 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to FIG. 1 and FIG. 2 at the same time. The display device 200 of this embodiment is similar to the display device 100 of FIG. 1. Therefore, the same or similar components are denoted by the same or similar reference numerals. Specifically That is, the display device 200 includes a first display panel 210 and a second display panel 220. The first display panel 210 includes a first pixel 212 and the second display panel 220 includes second pixels 222 and 224. The first pixel 212 includes a first sub-pixel 212a, 212b, 212c, the second pixel 222 includes a second sub-pixel 222a, 222b, 222c, 222d, and the second pixel 224 includes a second sub-pixel 224a, 224b, 224c, and 224d, where the first display panel 210, the first pixel 212, and the first sub-pixel 212a, 212b, and 212c are configured and related, and the second display panel 220, the second pixel 222, 224, and For the effects of the second sub-pixels 222a, 222b, 222c, 222d, 224a, 224b, 224c, and 224d, reference may be made to the detailed description of the embodiment in FIG. 1, and details are not described herein again. The difference is that the second display panel 220 in this embodiment may be, for example, a subpixel rendering (SPR) display panel, and the second pixels 222 and 224 of the second display panel 220 are The first pixel 212 is larger than the first pixel 212 of the first display panel 210 to increase the display brightness of the display device 200.

Specifically, the second pixel 222 includes a plurality of second sub pixels 222a, 222b, 222c, and 222d arranged in an array, and the second pixel 224 includes a plurality of second sub pixels 224a, 224b, and 224c arranged in an array. , 224d, where the arrangement and combination of the color configurations of the second sub-pixels 222a, 222b, 222c, and 222d of the second pixel 222 are different from the colors of the second sub-pixels 224a, 224b, 224c, and 224d of the second pixel 224 The permutations and combinations configured, for example, the second red sub-pixel 222a of the second pixel 222 is located in the n-th column of the pixel area (not shown) of the second display panel 220, and the second sub-pixel 222c of blue is located The n + 1th column of the pixel area of the second display panel 220, and the red second sub-pixel 224a of the second pixel 224 is located in the pixel area of the second display panel 220. In the n + 1th column, the blue second sub-pixel 224c is located in the n-th column of the pixel area of the second display panel 220, but is not limited thereto. In other embodiments not shown, the color arrangement of the second sub-pixel of each second pixel may have other permutations and combinations according to the actual design requirements. In addition, the size of the second sub-pixel 222a, 222c of the second pixel 222 is different from that of the second sub-pixel 222b, 222d, and the size of the second sub-pixel 224a, 224c of the second pixel 224 is different from that of the second The sizes of the sub pixels 224b and 224d are different.

In this embodiment, the second sub-pixels 222a, 222b, 222c, and 222d of the second pixel 222 and the second sub-pixels 224a, 224b, 224c, and 224d of the second pixel 224 may be respectively red and green. , Blue, and green subpixels. That is, the second pixels 222 and 224 of the second display panel 220 may be, for example, display panels of an RGBG color array, and the second sub pixels 222b and 222d of the second pixel 222 and the first pixels of the second pixel 224 The two sub-pixels 224b and 224d may have the same color and the same size. In addition, each second sub-pixel of a different color may have a different area, for example, the second sub-pixel 224a of red and the second sub-pixel 224b of green have different areas, but not limited thereto.

As can be seen from FIG. 2, the size of each first pixel 212 in this embodiment is smaller than the size of each second pixel 222, 224. The area of the second pixel 222 corresponds to the area of the two first pixels 212, and the area of the second pixel 224 corresponds to the area of the other two first pixels 212. Some of the second sub pixels 222a, 222c , 224a, 224c respectively correspond to the two first sub-pixels 212a, 212b of the corresponding first pixel 212, and the remaining second sub-pixels 222b, 222d, 224b, 224d respectively correspond to the corresponding A first sub-pixel 212c. That is, each second sub-pixel 222a, 222c, 224a, 224c may be twice the area of each first sub-pixel 212a, 212b, and each second sub-pixel 222a, 222c, 224a, 224c It can be twice the area of each second sub-pixel 222b, 222d, 224b, 224d, but not limited to this. Since the size of the second pixels 222 and 224 in the second display panel 220 is larger than the size of the first pixels 212 in the first display panel 210, when the first pixels 212 and the second pixels 222 and 224 are all When the maximum bright state is turned on, the brightness independently presented by the first display panel 210 is different from the brightness independently presented by the second display panel 220.

FIG. 3 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to FIG. 1 and FIG. 3 at the same time. The display device 300 of this embodiment is similar to the display device 100 of FIG. 1. Therefore, the same or similar components are denoted by the same or similar reference numerals. Specifically, the display device 300 includes a first display panel 310 and a second display panel 320. The first display panel 310 includes a first pixel 312, and the second display panel 320 includes a second pixel 322, 324. The first pixel 312 includes a first sub-pixel 312a, 312b, 312c, the second pixel 322 includes a second sub-pixel 322a, 322b, 322c, 322d, and the second pixel 324 includes a second sub-pixel 324a, 324b, 324c, and 324d, where the first display panel 310, the first pixel 312, and the first sub-pixel 312a, 312b, and 312c are configured and related, and the second display panel 320, the second pixel 322, 324, and For the effects of the second sub-pixels 322a, 322b, 322c, 322d, 324a, 324b, 324c, and 324d, reference may be made to the detailed description of the embodiment in FIG. 1, and details are not described herein again. The difference between the two is that the second display panel 320 in this embodiment may be a display surface of a multi-primary color (MPC) sub-pixel rendering technology (SPR). The second pixels 322 and 324 of the second display panel 320 have a larger aperture ratio and a different color array arrangement than the first pixels 312 to increase the brightness of the display device 300.

Specifically, the second pixel 322 includes four second sub-pixels 322a, 322b, 322c, 322d arranged in an array, and the second pixel 324 includes four second sub-pixels 324a, 324b, 324c arranged in an array. 324d, wherein the arrangement and combination of the color configuration of the sub-pixels of the second pixel 322 is different from the arrangement and combination of the color configuration of the sub-pixels of the second pixel 324, for example, the red sub-picture of the second pixel 322 The pixels 322a and the green second sub-pixel 322b are located in the n-th column of the pixel area (not shown) of the second display panel 320, and the blue second sub-pixel 322c and the white second sub-pixel 322d are located The n + 1th column of the pixel region of the second display panel 320, and the red second sub-pixel 324a and the green second sub-pixel 324b of the second pixel 324 are located in the pixel region of the second display panel 320 In the (n + 1) th column, the blue second sub-pixel 324b and the white second sub-pixel 324d are located in the n-th column of the pixel area of the display panel 320, but not limited thereto. That is, the second pixels 322 and 324 of the second display panel 320 may be, for example, display panels of an RGBW color array, and the second sub pixels 322a, 322b, 322c, and 322d of the second pixel 322 and the second pixel The second sub-pixels 324a, 324b, 324c, and 324d of 324 may be composed of sub-pixels of red, green, blue, and white, but are not limited thereto. In other embodiments not shown, the second pixel may also be an RGBY (red, green, blue, yellow) color array or other color configuration, which is not limited herein.

In this embodiment, the size of each first pixel 312 is smaller than the size of each second pixel 322, 324. The area of the second pixel 322 corresponds to two first pixels The area of 312, the area of the second pixel 324 corresponds to the area of the other two first pixels 312, where each of the second sub-pixels 322a, 322b, 322c, 322d, 324a, 324b, 324c, and 324d correspond to two of the first sub-pixels 312a, 312b, and 312c, respectively, but are not limited thereto. In terms of the number of sub-pixels shown in FIG. 3, the area of each second sub-pixel 322a, 322b, 322c, 322d, 324a, 324b, 324c, 324d is approximately the first sub-pixel 312a, 312b, 312c, respectively. 1.5 times, but not limited to this. As in the foregoing embodiment, the first display panel 310 and the second display panel 320 in this embodiment have different pixel aperture ratios. In addition, when the first pixel 312 and the second pixels 322 and 324 are all turned on in the maximum bright state, the brightness independently presented by the first display panel 310 is different from the brightness independently presented by the second display panel 320.

FIG. 4 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to FIG. 3 and FIG. 4 at the same time. The display device 400 of this embodiment is similar to the display device 300 of FIG. 3, and therefore the same or similar elements are denoted by the same or similar reference numerals. Specifically, the display device 400 includes a first display panel 410 and a second display panel 420. The first display panel 410 includes first pixels 412 and 414, and the second display panel 420 includes second pixels 422 and 424. The first pixel 412 includes first sub pixels 412a, 412b, and 412c, the first pixel 414 includes first sub pixels 414a, 414b, and 414c, and the second pixel 422 includes second sub pixels 422a, 422b, and 422c 422d, and the second pixel 424 includes second sub-pixels 424a, 424b, 424c, 424d, where the second display panel 420, the second pixel 422, 424, and the second sub-pixel 422a, 422b, 422c, 422d , 424a, 424b, 424c, and 424d, and the first display panel 410, For the effects of the first pixels 412, 414 and the first sub-pixels 412a, 412b, 412c, 412d, 414a, 414b, 414c, and 414d, reference may be made to the detailed description of the embodiment in FIG. 3, and details are not described herein again. The difference between the two is that the first display panel 410 in this embodiment may be a sub-pixel rendering technology (SPR) display panel of an RGB array to further increase the brightness of the display device 400.

Specifically, the first pixel 412 includes four first sub-pixels 412a, 412b, 412c, 412d arranged in an array, and the first pixel 414 includes four first sub-pixels 414a, 414b, 414c arranged in an array. 414d, wherein the arrangement and combination of the color configuration of the sub-pixels of the first pixel 412 is different from the arrangement and combination of the color configuration of the sub-pixels of the first pixel 414, for example, the first red sub-picture of the first pixel 412 The pixel 412a is located in the n-th column of the pixel area (not shown) of the first display panel 410, and the blue first sub-pixel 412c is located in the n + 1th column of the pixel area of the first display panel 410. A red first sub-pixel 414a of a pixel 414 is located in the n + 1th column of the pixel area of the first display panel 410, and a blue first sub-pixel 414c is located in the pixel area of the first display panel 410. Column n, but not limited to this. In addition, the size of the first sub-pixel 412a, 412c of the first pixel 412 is different from that of the first sub-pixel 412b, 412d, and the size of the first sub-pixel 414a, 414c of the first pixel 414 is different from that of the first The sub pixels 414b and 414d have different sizes.

In this embodiment, the first sub-pixels 412a, 412b, 412c, and 412d of the first pixel 412 and the first sub-pixels 414a, 414b, 414c, and 414d of the first pixel 414 may be respectively red and green. , Blue, and green subpixels. That is, the first pixels 412 and 414 of the first display panel 410 may be, for example, RGBG color arrays. The display panel, and the first sub-pixels 412b and 412d of the first pixel 412 and the first sub-pixels 414b and 414d of the first pixel 414 may have the same color and the same size. In addition, each of the first sub-pixels of different colors has a different area, for example, the first sub-pixel 412a of red and the first sub-pixel 412b of green have different areas, but not limited thereto.

As can be seen from FIG. 4, the size of the first pixels 412 and 414 is equal to the size of the second pixels 422 and 424. The area of the first pixel 412 corresponds to the area of the second pixel 422, and the area of the first pixel 414 corresponds to the area of the second pixel 424. Some of the first sub pixels 412b, 412d, 414b, and 414d Corresponds to a second sub-pixel 422b, 422d, 424d, 424b, and the remaining first sub-pixels 412a, 412c, 414a, 414c correspond to the second sub-pixel 422a, 422b, 422c, 422d, 424a, Two of 424b, 424c, and 424d. That is, the first sub-pixel 412a, 412c, 414a, 414c may be twice the area of the first sub-pixel 412b, 412d, 414b, 414d, but not limited thereto. As in the foregoing embodiment, the first display panel 410 and the second display panel 420 in this embodiment have different pixel aperture ratios. In addition, when the first pixels 412, 414 and the second pixels 422, 424 are all turned on in the maximum bright state, the brightness independently presented by the first display panel 410 is different from the brightness independently presented by the second display panel 420.

FIG. 5 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to FIG. 1 and FIG. 5 at the same time. The display device 500 of this embodiment is similar to the display device 100 of FIG. 1. Therefore, the same or similar elements are denoted by the same or similar reference numerals. Specifically, the display device 500 includes a first display panel 510 and a second display panel 520. A display panel 510 includes a first pixel 512 and a second display panel 520 includes a second pixel 522. The first pixel 512 includes a first sub-pixel 512a, 512b, and 512c, and the second pixel 522 includes a second sub-pixel 522a, 522b, 522c, and 522e. The first display panel 510, the first pixel 512, and For the configuration relationship and efficacy of the first sub-pixels 512a, 512b, and 512c, and the efficacy of the second display panel 520, the second pixel 522, and the second sub-pixel 522a, 522b, and 522c, please refer to the details of the embodiment of FIG. 1 Explanation, will not be described in detail here. The difference between the two is that the second display panel 520 in this embodiment may be a transflective (T / R) multi-color (MPC) display panel to improve the image quality of the display device 500 when the ambient light intensity is high. Visibility. That is, the display device 500 may use one of the first display panel 510 and the second display panel 520 as a transflective display panel and the other as a transmissive display panel according to actual installation requirements. Here, the second display panel 520 of this embodiment may be a transflective display panel, so the display device 500 may timely select a backlight module (not shown) to penetrate or reflect the ambient light source according to the intensity of the ambient light. As a result, the display device 500 has good development quality under any environment.

Specifically, the second display panel 520 in this embodiment may be a second pixel 522. For example, the second pixel 522 may be a display panel arranged by an array of RGB and reflective regions. That is, the second sub-pixels 522a, 522b, 522c, and 522e may be respectively It is composed of red sub pixels, green sub pixels, blue sub pixels, and reflective sub pixels, but it is not limited to this. Here, each second sub-pixel 522a, 522b, 522c, 522e of the second pixel 522 corresponds to two of the first sub-pixels 512a, 512b, 512c of the first pixel 512, respectively. That is, each second sub-pixel 522a, 522b, 522c, 522e can be Three-quarters of the area of the first sub-pixel 512a, 512b, 512c, but not limited to this.

FIG. 6 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to FIG. 3 and FIG. 6 at the same time. The display device 600 of this embodiment is similar to the display device 300 of FIG. 3, and therefore the same or similar elements are denoted by the same or similar reference numerals. Specifically, the display device 600 includes a first display panel 610 and a second display panel 620. The first display panel 610 and the second display panel 620 include first pixels 612 and second pixels 622 and 624, respectively. Pixel 612 includes first sub-pixels 612a, 612b, 612c, second pixel 622 includes second sub-pixels 622a, 622b, 622c, 622e, and second pixel 624 includes second sub-pixels 624a, 624b, 624c, 624e, where the configuration relationship and effect of the first display panel 610, the first pixel 612 and the first sub-pixel 612a, 612b, 612c, and the second display panel 620, the second pixel 622, 624 and the second For the effects of the sub-pixels 622a, 622b, 622c, 624a, 624b, and 624c, reference may be made to the detailed description of the embodiment in FIG. 3, and details are not described herein again. The difference between the two is that the second display panel 620 of this embodiment may be a transflective (T / R) multi-color (MPC) sub-pixel rendering technology (SPR) display panel to improve the display device 600. Visibility of the image at high ambient light. That is, the display device 600 may use one of the first display panel 610 and the second display panel 620 as a transflective display panel and the other as a transmissive display panel according to the actual installation requirements. Here, the second display panel 620 of this embodiment may be a transflective display panel, so the display device 600 may timely select a backlight module (not shown) to penetrate or reflect the ambient light source according to the intensity of the ambient light. As a result, the display device 600 has good image quality under any environment.

Specifically, in this embodiment, the second display panel 620 may be a second pixel 622, 624, for example, a display panel arranged by an array of RGB and reflection areas, that is, a second sub-pixel of the second pixel 622 The second sub-pixels 624a, 624b, 624c, 624e of 622a, 622b, 622c, 622e and the second pixel 624 can be composed of red sub-pixel, green sub-pixel, blue sub-pixel and reflective sub-pixel, respectively. Composition, but not limited to this.

FIG. 7 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to FIG. 1 and FIG. 7 at the same time. The display device 700 of this embodiment is similar to the display device 100 of FIG. 1. Therefore, the same or similar elements are denoted by the same or similar reference numerals. Specifically, the display device 700 includes a first display panel 710 and a second display panel 720. The first display panel 710 includes a first pixel 712 and the second display panel 720 includes a second pixel 722. The first pixel 712 includes first sub-pixels 712a, 712b, and 712c, and the second pixel 722 includes second sub-pixels 722a, 722b, 722c, and 722d. The first display panel 710, the first pixel 712, and The configuration relationship and efficacy of the first sub-pixels 712a, 712b, and 712c, and the efficacy of the second display panel 720, the second pixel 722, and the second sub-pixels 722a, 722b, 722c, and 722d can be referred to the embodiment of FIG. 1 The detailed description will not be repeated here. The difference between the two is that the second pixel 722 of the second display panel 720 in this embodiment has a larger aperture ratio than the first pixel 712 of the first display panel 710, so that the display device 700 can greatly Increase brightness.

Specifically, in this embodiment, the second sub-pixels 722a, 722b, 722c, and 722d of the second pixel 722 may be composed of red, green, blue, and white sub-pixels, respectively. That is, the second pixel 722 of the second display panel 720 may be, for example, Display panel of RGBW color array. In terms of the number of sub-pixels shown in FIG. 7, the area of each second pixel 722 corresponds to the area of the first pixel 712 arranged in four arrays, where each second sub-pixel 722a, 722b, 722c , 722d corresponds to two of the first sub-pixels 712a, 712b, 712c of each two adjacent first pixels 712. That is, each second sub-pixel 722a, 722b, 722c, 722d is approximately three times the area of the first sub-pixel 712a, 712b, 712c, but is not limited thereto. As in the foregoing embodiment, the first display panel 710 and the second display panel 720 in this embodiment have different pixel aperture ratios. In addition, when both the first pixel 712 and the second pixel 722 are turned on in the maximum bright state, the brightness independently presented by the first display panel 710 is different from the brightness independently presented by the second display panel 720.

FIG. 8 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to FIG. 1 and FIG. 8 at the same time. The display device 800 of this embodiment is similar to the display device 100 of FIG. 1. Therefore, the same or similar elements are denoted by the same or similar reference numerals. Specifically, the display device 800 includes a first display panel 810 and a second display panel 820, and the first display panel 810 and the second display panel 820 include a first pixel 812 and a second pixel 822, respectively, and the first pixel 812 includes the first sub-pixels 812a, 812b, and 812c, and the second pixel 822 includes a single color system sub-pixel, wherein the first display panel 810, the first pixel 812, and the first sub-pixel 812a, 812b, For the configuration relationship and efficacy of 812c, and the efficacy of the second display panel 820 and the second pixel 822, reference may be made to the detailed description of the embodiment in FIG. 1, which will not be described in detail here. The difference between the two is that the second display panel 820 in this embodiment may be a single-color display panel, that is, the second pixel 822 is a monochrome sub-pixel. Here, the second pixel 822 of this embodiment may be, for example, It is a white sub pixel. When the second pixel 822 of the second display panel 820 is turned on, the second pixel 822 has a high light transmittance, which can greatly increase the brightness of the display device 800.

As can be seen from FIG. 8, the area of the second pixel 822 corresponds to the area of the four first pixels 812. That is, each second pixel 822 may be three times the area of each first sub-pixel 812a, 812b, 812c, but is not limited thereto. As in the foregoing embodiment, the first display panel 810 and the second display panel 820 in this embodiment have different pixel aperture ratios. In addition, when the first pixel 812 and the second pixel 822 are all turned on in the maximum bright state, the brightness independently presented by the first display panel 810 is different from the brightness independently presented by the second display panel 820.

FIG. 9 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to FIG. 8 and FIG. 9 at the same time. The display device 900 of this embodiment is similar to the display device 800 of FIG. 8. Therefore, the same or similar elements are denoted by the same or similar reference numerals. Specifically, the display device 900 includes a first display panel 910 and a second display panel 920, the first display panel 910 includes a first pixel 912, and the second display panel 920 includes second pixels 922, 924. The first pixel 912 includes first sub-pixels 912a, 912b, and 912c, and the second pixels 922 and 924 are single-color sub-pixels of different colors. The first display panel 910, the first pixel 912, and For the configuration relationship and efficacy of the first sub-pixels 912a, 912b, and 912c, and the efficacy of the second display panel 920, the second pixels 922, and 924, reference may be made to the detailed description of the embodiment in FIG. The difference between the two is that the second display panel 920 in this embodiment may be a two-color display panel, that is, the color of the second pixel 922 is different from the color of the second pixel 924, thereby increasing the brightness of the display device 900. Here, the second pixel 922 of this embodiment may be A single blue sub-pixel is constituted, and the second pixel 924 may be constituted by a single green sub-pixel, and the second pixel 922 and the second pixel 924 are arranged alternately with each other, but not limited thereto. In other embodiments not shown, the second pixels 922 and 924 may also be composed of white and green sub-pixels or have different color configurations according to the actual design.

FIG. 10 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to FIG. 1 and FIG. 10 at the same time. The display device 1000 of this embodiment is similar to the display device 100 of FIG. 1. Therefore, the same or similar elements are denoted by the same or similar reference numerals. Specifically, the display device 1000 includes a first display panel 1010 and a second display panel 1020, the first display panel 1010 includes a first pixel 1012, and the second display panel 1020 includes a second pixel 1022. The first pixel 1012 includes first sub-pixels 1012a, 1012b, and 1012c, the second pixel 1022 includes second sub-pixels 1022a, 1022b, 1022c, and 1022d, and the second sub-pixel 1022d includes a penetration region 1022d (T ) And the reflection area 1022d (R), in which the first display panel 1010, the first pixel 1012, and the first sub-pixels 1012a, 1012b, 1012c and the second display panel 1020, the second pixel 1022 For the effects of the second sub-pixels 1022a, 1022b, 1022c, and 1022d, reference may be made to the detailed description of the embodiment in FIG. 1, and details are not described herein again. The difference between the two is that the second sub-pixel 1022d in this embodiment includes a transmissive region 1022d (T) and a reflective region 1022d (R). That is, the second sub-pixel 1022d is a transflective display pixel, and The display device 1000 can effectively use an backlight light source (not shown) and ambient light (not shown) to perform image display, but it is not limited thereto. In other embodiments not shown, each second sub-pixel of the second pixel of the second display panel may also be set. There are a penetrating region and a reflecting region, so that the display device can have good image quality under any environment.

Therefore, in all embodiments of the present invention, the first pixel of the first display panel includes a plurality of first sub-pixels, respectively. The first sub-pixel has N colors, where N is a positive integer, and the second display The second pixels of the panel each include a plurality of second sub-pixels. The second sub-pixels have M colors, where M is a positive integer and N is not equal to M. Accordingly, the first display panel and the second display panel of the display device in different embodiments of the present invention have different pixel configurations and sizes, so that the resolution of the first display panel is different from that of the second display panel. The resolution of the display panel and / or the aperture ratio of the first pixel is different from the aperture ratio of the second pixel, which can effectively improve the overall brightness and display quality of the display device. In addition, the display device may also be provided with a reflection area in a part of the display panel, so as to improve the visibility of the image when the ambient light is strong.

It is worth mentioning that because the image suitable for car dashboards, watches, or game consoles does not need to achieve a photo-like effect in color performance, multi-layer displays do not require the pixels of each layer of the display panel. It is required to have high color performance. Therefore, some display panels can be adaptively adjusted according to different needs to achieve better visual effects and display quality than single-layer display devices. FIG. 11A is a schematic diagram of a display device according to another embodiment of the present invention. FIG. 11B is a schematic top view of the wiring of the display device of FIG. 11A. Please refer to FIG. 1 and FIG. 11A at the same time. The display device 1100 in this embodiment is similar to the display device 100 in FIG. 1. Therefore, the same or similar components are denoted by the same or similar reference numerals. The display device 1100 includes a first display panel 1110 and a second display panel 1120. The first display panel 1110 includes a plurality of first display panels 1110. A pixel 1112 and a plurality of first display signal lines 1116 that transmit signals to the first pixel 1112. The second display panel 1120 includes a plurality of second pixels 1122 and a plurality of second signals that transmit signals to the second pixel 1122. The signal line 1126 is displayed. The first pixel 1112 includes first sub-pixels 1112a, 1112b, and 1112c, and the second pixel 1122 includes second sub-pixels 1122a, 1122b, and 1122c. The first display panel 1110, the first pixel 1112, and the first For the configuration relationship and efficacy of the sub-pixels 1112a, 1112b, and 1112c, and the efficacy of the second display panel 1120, the second pixel 1122, and the second sub-pixels 1122a, 1122b, and 1122c, please refer to the detailed description of the embodiment of FIG. It will not be described in detail here. The difference between the two is that each first pixel 1112 of the first display panel 1110 in this embodiment has a first outline 1111, and each second pixel 1222 has a second outline 1121, and the The sides are not parallel to the sides of the second profile 1121 to avoid the problem of overlapping. It should be noted that the first display signal line 1116 of the first display panel 1110 and the second display signal line 1126 of the second display panel 1120 are only schematically and partially shown on the first display panel 1110 and the second display panel, respectively. Within 1120, however, a person skilled in the art should know that the number of the first display signal lines 1116 will increase or decrease correspondingly with the number of the first pixels 112, and the number of the second display signal lines 1126 will follow the first The number of two pixels 1122 increases and decreases correspondingly.

Specifically, please refer to FIGS. 11A and 11B at the same time. The sides of the first contour 1111 and the sides of the second contour 1121 intersect at an angle, and the angle is 30 degrees to 60 degrees. phenomenon. In particular, when the intersection angle of the side of the first contour 1111 and the side of the second contour 1121 is 45 degrees, the problem of moire can be effectively avoided, but not limited to this, as long as the first display stacked on top of Panel 1110 with The different orientations of the outlines of the pixels of the second display panel 1120 can help avoid the occurrence of display moire.

In addition, the trace of each first display signal line 1116 (that is, the linear trajectory defined by the signal line entity) has a first extension direction D1, and the trace of each second display signal line 1126 has a second extension direction D2. Moreover, the first extension direction D1 is not parallel and perpendicular to the second extension direction D2, and the angle between the first extension direction D1 and the second extension direction D2 is 30 degrees to 60 degrees. Particularly, when the intersection angle of the first extension direction D1 and the second extension direction D2 is 45 degrees, the problem of moire can be effectively avoided. Here, each of the second display signal lines 1126 is bent, and each of the first display signal lines 1116 is straight. That is, the second display signal line 1126 may be a U-shape. However, in other embodiments not shown, the first display signal line may also be bent, which is not limited herein.

In addition, the first display panel 1110 of the display device 1100 of this embodiment further includes a first black matrix layer (not shown), and the second display panel 1120 further includes a second black matrix layer (not shown), where the first The black matrix layer circles the outline of each first sub-pixel 1112a, 1112b, 1112c of each first pixel 1112, and the second black matrix layer circles each second sub-picture of each second pixel 1122 The outline of the prime 1122a, 1122b, 1122c. Therefore, the first contour 1111 and the second contour 1121 of the display device can also be arranged in a non-parallel manner by adjusting the pattern settings of the first black matrix layer and the second black matrix layer to avoid the occurrence of the moire problem.

FIG. 12 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to FIG. 1 and FIG. 12 at the same time. The display device 1200 in this embodiment is similar to the display device in FIG. 1. 100, therefore the same or similar elements are denoted by the same or similar reference numerals. Specifically, the display device 1200 includes a first display panel 1210, a second display panel 1220, a first polarizing plate 1230, and a second polarizing plate 1240. The first display panel 1210 and the second display panel 1220 are located between the first polarizer 1230 and the second polarizer 1240. The light absorption axis direction 1232 of the first polarizer 1230 is different from the light absorption axis direction of the second polarizer 1240. 1242. Here, the light absorption axis direction 1232 of the first polarizer 1230 intersects the light absorption axis direction 1242 of the second polarizer 1240 and the included angle is 90 degrees, but it is not limited thereto. The display light 1252 of one of the first display panel 1210 and the second display panel 1220 has a polarization state, and the display light 1252 maintains the polarization state and enters the other of the first display panel 1210 and the second display panel 1220.

As shown in FIG. 12, when the backlight 1250 ′ generated by the backlight module (not shown) is incident on the display device 1200 from the side of the second polarizer 1240 that is relatively far away from the second display panel 1220, the second polarizer 1240 is only Part of the light in the backlight 1250 'having the same vibration direction as the light absorption axis direction 1242 is allowed to pass through to form polarized light 1250 having a polarization state. The polarized light 1250 passes through the second display panel 1220 to form a display light 1252 with a polarization state. The polarization state of the display light 1252 may be determined by the optical characteristics of the display medium (such as liquid crystal molecules) inside the second display panel 1220. Therefore, The polarization state of the display light 1252 may be different from or the same as the polarization state of the polarized light 1250. Next, since there is no polarizer between the first display panel 1210 and the second display panel 1220, the display light 1252 maintains the polarization state when it leaves the second display panel 1220 and enters the first display panel 1210 to form display light. Line 1254, where the polarization state of the display light 1254 may be determined by the optical characteristics of the display medium (eg, liquid crystal molecules) inside the first display panel 1210. Finally, the display light 1254 can pass through the portion of the first polarizing plate 1230 and can be emitted away from the first polarizing plate 1230 to present the required brightness to realize the display of the screen.

Compared with a display device in which one polarizer is sandwiched between two sides of each display panel and two polarizers are sandwiched between display panels stacked on top of each other, the first display of the display device 1200 of this embodiment is There is no polarizer between the panel 1210 and the second display panel 1220, and the overall display brightness of the display device 1200 can be effectively improved. That is, the first polarizing plate 1230 and the second polarizing plate 1240 are located only at the outermost sides of the first display panel 1210 and the second display panel 1220 stacked one above the other, so that the light transmittance of the display device 1200 is improved to have a good Performance of development brightness.

In other embodiments not shown, when the display device has a plurality of first display panels, a plurality of second display panels, or a combination thereof, the display device still has only a first polarizer and a first polarizer. Two polarizers. That is, the first polarizer will be located on the side of the uppermost display panel that is relatively far from the lowermost display panel, and the second polarizer will be on the side of the lowermost display panel that is relatively far from the uppermost display panel. A first display panel, a plurality of second display panels, or a combination of the above-mentioned multilayer display panels are located between the first polarizer and the second polarizer.

It is worth mentioning that, in the above embodiment, the display device only schematically illustrates one first display panel and one second display panel respectively as an example. However, in other embodiments that are not shown, the display device may include a plurality of first display panels and a plurality of second display panels, which are stacked on top of each other, so that the display panel can be It is required or preferred to switch the display screen, maintain the stereo visual effect brought by the mechanical components of the traditional mechanical display device, and have a good image resolution.

In addition, in the above embodiment, the first display panel and the second display panel with pixels in different array arrangements, and the display device having an intersection angle can be used together or individually, that is, a composite setting combination makes the display device With excellent display effects. In addition, in all the embodiments of the present invention, the first display panel and the second display panel can adaptively adjust the function of which display panel to develop the color function according to the design requirements of the actual product. Be restricted.

In summary, since the display device of the present invention includes a first display panel and a second display panel stacked one above the other, the first display panel includes the first pixels arranged in an array, and the second display panel includes the pixels arranged in an array. The brightness of the first display panel independently when the second pixel is turned on in the maximum bright state is different from the brightness of the second display panel independently when the second pixel is turned on in the maximum bright state. That is, by this, the display brightness performance and the display quality of the display device can be effectively improved.

Furthermore, due to the display panel provided by the present invention, the display panels of each layer have pixels in different arrays and combinations, different aperture ratios, and different configuration angles, which can effectively avoid the moire phenomenon and have better display brightness performance and Development quality.

Although the present invention has been disclosed as above by way of example, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and decorations without departing from the spirit and scope of the present invention. The protection scope of the present invention Subject to the scope of the attached patent application.

Claims (22)

A display device includes: a first display panel including a plurality of first pixels arranged in an array; and a second display panel stacked on top of the first display panel, and the second display panel includes an array A plurality of second pixels arranged, wherein when the first pixels are all turned on in the maximum bright state, the brightness independently displayed by the first display panel is different from the second pixels when the second pixels are turned on in the maximum bright state. The brightness independently presented by the display panel, wherein there is no polarizer between the first display panel and the second display panel, and both the first display panel and the second display panel are liquid crystal display panels. The display device according to item 1 of the application, wherein the aperture ratio of the first pixels is different from the aperture ratio of the second pixels. The display device according to item 1 of the scope of patent application, wherein a resolution of the first display panel is different from a resolution of the second display panel. The display device according to item 1 of the scope of patent application, wherein one of the first display panel and the second display panel is a transflective display panel, and the other is a transmissive display panel. According to the display device of claim 1, the liquid crystal material characteristics of the first display panel are different from the liquid crystal material characteristics of the second display panel. The display device according to item 1 of the scope of patent application, wherein the first pixels of the first display panel each include a plurality of first sub-pixels, and the first sub-pixels have N colors, where N Is a positive integer. The display device according to item 6 of the scope of patent application, wherein the second pixels of the second display panel each include a plurality of second sub-pixels, and the second sub-pixels have M colors, where M Is a positive integer. The display device according to item 7 of the scope of patent application, wherein each of the second pixels of the second display panel further includes at least one white sub-pixel. The display device according to item 7 of the scope of patent application, wherein the second sub-pixels of different colors have different areas. The display device according to item 7 of the scope of patent application, wherein N is not equal to M. The display device according to item 6 of the scope of patent application, wherein each of the second pixels of the second display panel further includes at least one white sub-pixel. The display device according to item 1 of the scope of patent application, wherein each of the first pixels has a first outline, each of the second pixels has a second outline, and the sides of the first outline and the second outline The sides are not parallel. The display device according to item 12 of the application, wherein the sides of the first contour and the sides of the second contour intersect at an angle, and the angle is 30 degrees to 60 degrees. The display device according to item 1 of the scope of patent application, wherein the first display panel further includes a plurality of first display signal lines, and each of the first display signal lines is bent. The display device according to item 1 of the scope of patent application, wherein the second display panel further includes a plurality of second display signal lines, wherein the second display signal lines are each bent. A display device includes: a first display panel including a plurality of first pixels arranged in an array; and a second display panel stacked on top of the first display panel, and the second display panel includes an array A plurality of arranged second pixels, wherein an aperture ratio of the first pixels is different from an aperture ratio of the second pixels, wherein a polarizer is not provided between the first display panel and the second display panel, The first display panel and the second display panel are both liquid crystal display panels. The display device according to item 16 of the scope of patent application, wherein the second pixels of the second display panel include a plurality of second sub-pixels, respectively, and some of the second sub-pixels have different sizes. The display device according to item 17 of the scope of patent application, wherein the first pixels of the first display panel include a plurality of first sub-pixels, respectively, and the first sub-pixels have the same size. The display device according to item 18 of the scope of patent application, wherein the first sub-pixels are all transmissive display pixels. The display device according to item 17 of the scope of patent application, wherein at least one of the second sub-pixels is a transflective display pixel. The display device according to item 16 of the scope of patent application, wherein the first pixels include first sub-pixels of N colors, the second pixels include second sub-pixels of M colors, and N and M is a positive integer. The display device as described in claim 21, wherein N is different from M.