CN113759589A - Display device - Google Patents

Abstract

The present disclosure provides a display device. The display device comprises a panel. The panel is provided with a light emitting area, the light emitting area comprises a first sub-pixel, a second sub-pixel and a third sub-pixel, and the first sub-pixel, the second sub-pixel and the third sub-pixel are adjacent to each other. The first sub-pixel has a first frequency spectrum, the second sub-pixel has a second frequency spectrum, the third sub-pixel has a third frequency spectrum, a peak of the first frequency spectrum corresponds to a first wavelength, a peak of the second frequency spectrum corresponds to a second wavelength, a peak of the third frequency spectrum corresponds to a third wavelength, and differences among the first wavelength, the second wavelength and the third wavelength are less than 5 nanometers.

Description

Display device

The application is a divisional application of Chinese patent application with the application number of 201810113949.0 and the name of display device applied in 2018, 2, month and 5

Technical Field

The present disclosure relates to a display device, and more particularly, to a display device capable of adjusting display colors.

Background

Conventionally, a vehicle driver needs to look down at driving information on a display screen, which is likely to affect driving attention, so that a head-up display (HUD) for a vehicle is formed by combining a reality augmentation technology into a human-computer interaction interface of the vehicle, which has become a research and development trend of display companies at present.

However, the head-up display for vehicles or other displays for vehicles consumes more energy because they need higher brightness or chroma than the general displays under outdoor strong light. In addition to head-up displays, other displays used outdoors require higher brightness or chroma. Therefore, how to increase the display brightness and the color or reduce the power consumption is one of the important points in development.

Disclosure of Invention

The present disclosure relates to a display device. According to the embodiments of the present disclosure, by designing the light emitted by the at least two sub-pixels of the single light emitting area to have substantially the same color, the luminance conversion rate of the light emission of the display device can be greatly improved, so that the display device can present a predetermined display image, and the power consumption of the display device can be greatly reduced.

According to an embodiment of the present disclosure, a display device is provided. The display device comprises a panel. The panel is provided with a light emitting area, the light emitting area comprises a first sub-pixel, a second sub-pixel and a third sub-pixel, and the first sub-pixel, the second sub-pixel and the third sub-pixel are adjacent to each other. The first sub-pixel has a first frequency spectrum, the second sub-pixel has a second frequency spectrum, the third sub-pixel has a third frequency spectrum, a peak of the first frequency spectrum corresponds to a first wavelength, a peak of the second frequency spectrum corresponds to a second wavelength, a peak of the third frequency spectrum corresponds to a third wavelength, and differences among the first wavelength, the second wavelength and the third wavelength are less than 5 nanometers.

Drawings

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, wherein:

fig. 1A is a schematic diagram of a display device according to an embodiment of the disclosure.

Fig. 1B is a top view of a backlight module according to an embodiment of the disclosure.

Fig. 1C is a top view of a backlight module according to another embodiment of the disclosure.

Fig. 2 shows a spectrum of light emission of a display device according to an embodiment of the present disclosure.

Fig. 3A-3I illustrate schematic views of display devices according to some embodiments of the present disclosure.

Fig. 4A is a schematic diagram illustrating a predetermined display pattern according to an embodiment of the disclosure.

Fig. 4B is a schematic view illustrating an arrangement of light-emitting areas and opaque areas according to an embodiment of the disclosure.

Fig. 5A is a schematic diagram illustrating an application of the display device according to an embodiment of the disclosure to an augmented reality.

Fig. 5B is another schematic diagram illustrating an application of the display device according to an embodiment of the disclosure to an augmented reality.

Element numbering in the figures:

1. 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I: display device

10: display panel

20: backlight module

20-1: first backlight source

20-2: second backlight source

21: a first backlight region

22: a second backlight area

23: a third backlight area

24: the fourth backlight area

30: optical film

40: lens layer

100: first light-emitting area

100P: a first light-emitting pattern

100-1: first sub-pixel

100-2: second sub-pixel

101: first color sub-block

102: second color sub-block

103: third color sub-block

200: second luminous zone

200P: second light emitting pattern

300: third luminous zone

300P: third light emitting pattern

400: dark area

500: opaque region

1001: first color block

1002: second color block

1003: second color block

2001: white light LED

2002: RGB LED backlight source

L1: first frequency spectrum

L2: second frequency spectrum

P1, P2: wave crest

Δ λ: difference value

Detailed Description

According to the embodiment of the disclosure, by designing the light emitted by the at least two sub-pixels of the single light emitting area to have substantially the same color, the luminance conversion rate of the light emission of the display device can be greatly improved, the initial luminance of the backlight module can be greatly reduced, so that the display device can present a predetermined display image, and the energy consumption of the display device can be greatly reduced.

Embodiments of the present disclosure are described in detail below with reference to the attached drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts. It should be noted that the drawings are simplified to clearly illustrate the embodiments, and the detailed structures of the embodiments are only for illustration and are not intended to limit the scope of the disclosure. One of ordinary skill in the art will readily recognize that there could be variations or modifications made to the structures described herein, depending on the needs of the actual implementation. Further, when a layer is "on" another layer or a substrate, it may mean that the layer is "directly" on the other layer or the substrate, or that the layer is "indirectly" on the other layer or the substrate, that is, that the other layer is interposed between the layer and the other layer or the substrate. When a layer is "in contact with" another layer or a substrate, it may mean that the layer is "in direct contact with" the other layer or the substrate, or that the layer is "in indirect contact with" the other layer or the substrate, i.e., that the layer is sandwiched between the layer and the other layer or the substrate. Furthermore, the use of ordinal numbers such as "first," "second," "third," etc., in the specification and claims to modify a claim element does not by itself connote any preceding ordinal number of the claim element, nor does it denote the order of a certain claim element from another claim element or method of manufacture, but are used merely to distinguish one claim element having a certain name from another element having a same name.

Fig. 1A illustrates a schematic diagram of a display device according to an embodiment of the disclosure, fig. 1B illustrates a top view of a backlight module according to an embodiment of the disclosure, fig. 1C illustrates a top view of a backlight module according to another embodiment of the disclosure, and fig. 2 illustrates a spectrum of light emission of the display device according to an embodiment of the disclosure. As shown in fig. 1A to 2, the display device 1 includes a display panel 10 and a backlight module 20, and the backlight module 20 is disposed corresponding to the display panel 10. The display panel 10 has a first light-emitting area 100, the first light-emitting area 100 includes a first sub-pixel 100-1 and a second sub-pixel 100-2, and the first sub-pixel 100-1 is adjacent to the second sub-pixel 100-2. The backlight module 20 emits a backlight, the backlight has a first spectrum L1 after passing through the first sub-pixel 100-1, the backlight has a second spectrum L2 after passing through the second sub-pixel 100-2, a peak P1 of the first spectrum L1 corresponds to a first wavelength, a peak P2 of the second spectrum L2 corresponds to a second wavelength, and a difference Δ λ between the first wavelength and the second wavelength is less than 5 nm.

As shown in fig. 2, there may be multiple peaks in a spectrum, and the peak referred to in this disclosure refers to the peak of the spectrum having the greatest light intensity. The spectrum in fig. 2 is illustrated as white light, and other examples of the backlight source may be red, for example, and the peak of the maximum light intensity of the spectrum of the backlight source is located in the red region, for example, the corresponding wavelength of the peak of the maximum light intensity is 650 nanometers (nm).

According to an embodiment of the present disclosure, the difference Δ λ between the first wavelength and the second wavelength is less than 5 nm, which is equivalent to indicating that the first wavelength and the second wavelength are substantially the same, thereby indicating that the light emitted from the first sub-pixel 100-1 and the light emitted from the second sub-pixel 100-2 have substantially the same color.

In an embodiment, as shown in fig. 1A, the first sub-pixel 100-1 is, for example, adjacent to the second sub-pixel 100-2, and the first sub-pixel 100-1 and the second sub-pixel 100-2 belong to the same pixel. In other words, according to the embodiments of the present disclosure, the light emitted from the adjacent sub-pixels in one pixel has substantially the same color.

In an embodiment, the first light-emitting area 100 may include a plurality of sub-pixels, for example, at least two sub-pixels 100-1 to 100-2. In the embodiment shown in fig. 1A, the first light emitting area 100 includes, for example, 6 sub-pixels (e.g., equivalent to two pixels), but the disclosure is not limited thereto. According to the embodiment of the disclosure, the peak wavelengths of the light emission spectra of all the sub-pixels of a single light emitting region (e.g., the first light emitting region 100) are all less than 5 nm, in other words, the light emitted by all the sub-pixels of a single light emitting region (e.g., the first light emitting region 100) has substantially the same color.

According to the embodiments of the present disclosure, by designing the light emitted by at least two sub-pixels of a single light emitting region (e.g., the first light emitting region 100) to have substantially the same color, the luminance conversion rate of the light emission of the display device can be greatly improved, the initial luminance of the backlight module can be greatly reduced, so that the display device can present a predetermined display image, and the power consumption of the backlight module can be greatly reduced.

In an embodiment, as shown in fig. 1A, the backlight module 20 may include a first backlight 20-1 and a second backlight 20-2, where the first backlight 20-1 and the second backlight 20-2 are both disposed corresponding to the first light emitting region 100, and the first backlight 20-1 and the second backlight 20-2 have the same light emitting color. For example, as shown in FIG. 1A, the first backlight 20-1 and the second backlight 20-2 both emit red light. In another embodiment, the first light-emitting area 100 may include more pixels and sub-pixels, that is, the first light-emitting area 100 may include more than three pixels, or more than six sub-pixels. The number of pixels or sub-pixels in the second light emitting region 200 can be adjusted as required. Different light emitting areas can have different area sizes and pixel numbers. Depending on design requirements.

As shown in fig. 1A, the display device 1 further includes an optical film 30, and the optical film 30 is disposed between the display panel 10 and the backlight module 20. In some embodiments, the optical film 30 may include at least one of a brightness enhancement film, a reflective brightness enhancement film, and a diffuser film. The brightness enhancement film can be used for collecting light, the reflective brightness enhancement film can increase light efficiency, and the diffusion film can be used for improving light intensity uniformity.

As shown in fig. 1A, the display device 1 may further optionally include a lens layer 40 disposed on the display panel 10. The lens layer 40 may be used to form a three-dimensional image or enhance the depth of field effect. If a three-dimensional image is to be formed, a metal grating or a white photoresist grating may be selectively disposed between the display panel 10 and the backlight module 20, so as to form a three-dimensional image or enhance the depth of field effect.

In some embodiments, the backlight module 20 may include a plurality of backlight regions, such as at least a first backlight region 21 and a second backlight region 22, where the first backlight region 21 and the second backlight region 22 have different light emitting colors.

For example, as shown in fig. 1B (fig. 1B shows a top view of the backlight module 20 shown in fig. 1A), the backlight module 20 of the display device 1 includes at least a first backlight area 21 and a second backlight area 22, where the first backlight area 21 has, for example, red light emitting diodes, and the second backlight area 22 has, for example, green light emitting diodes, so that the first backlight area 21 emits red light and the second backlight area 22 emits green light. As shown in fig. 1B, the backlight module 20 of the display device 1 may further include a third backlight area 23 and/or a fourth backlight area 24, for example, a blue light emitting diode is disposed in the third backlight area 23, and for example, a yellow light emitting diode is disposed in the fourth backlight area 24, so that the third backlight area 23 emits blue light and the fourth backlight area 24 emits yellow light.

For example, as shown in fig. 1C (fig. 1C is a top view of another embodiment of the backlight module 20 different from that shown in fig. 1A), the backlight module 20 shown in fig. 1C may include a first backlight area 21, a second backlight area 22 and a third backlight area 23, where, for example, a red led is disposed in the first backlight area 21, a green led is disposed in the second backlight area 22, and a blue led is disposed in the third backlight area 23, so that the first backlight area 21 emits red light, the second backlight area 22 emits green light, and the third backlight area 23 emits blue light.

In other words, according to some embodiments, the backlight module 20 of the display device may adopt a design that partitions to provide different light emitting colors. However, the light emitting color, the number of backlight regions and the patterns thereof of the backlight module of the embodiment are only for illustration and are not intended to limit the scope of the present disclosure.

Fig. 3A to fig. 3I are schematic diagrams illustrating display devices according to some embodiments of the present disclosure, in which the same or similar elements as those in the previous embodiments are labeled with the same or similar elements, and the description of the same or similar elements refers to the foregoing description, which is not repeated herein.

In some embodiments, as shown in fig. 1A and fig. 3A to fig. 3I, the display panel may further have a second light-emitting region 200, and the second light-emitting region 200 and the first light-emitting region 100 may have the same or different light-emitting colors; the display panel may further have a third light emitting region 300, and the third light emitting region 300 and the second light emitting region 200 and/or the first light emitting region 100 may have the same or different light emitting colors. As shown in fig. 3A to 3I, the first light-emitting region 100 and the third light-emitting region 300 each include, for example, 36 sub-pixels (3 (sub-pixel) x6 (pixel/row) x2 (row)), and the second light-emitting region 200 includes, for example, 72 sub-pixels. In this embodiment, the size and shape of each light emitting region can be adjusted according to the requirement, but not limited thereto.

In some embodiments, the backlight module may include a plurality of backlight regions as shown in fig. 1B or fig. 1C. For example, as shown in fig. 3A, 3D and 3G, each of the backlight modules 20A, 20D and 20G of the display devices 1A, 1D and 1G includes a first backlight area 21, a second backlight area 22 and a third backlight area 23 as shown in fig. 1C, the first backlight area 21 has, for example, a red light emitting diode therein, the second backlight area 22 has, for example, a green light emitting diode therein, and the third backlight area 23 has, for example, a blue light emitting diode therein, so that the first backlight area 21 emits red light, the second backlight area 22 emits green light, and the third backlight area 23 emits blue light. Therefore, the display device shown in fig. 3A, 3D and 3G determines the color distribution of the display image through the partition design of the backlight modules 20A, 20D and 20G, and determines the pattern and brightness of the display image through the display panel. In this embodiment, the partitions of the backlight modules 20A, 20D, and 20G can be adjusted in size and shape according to the requirement, but not limited thereto.

In some embodiments, the backlight module may include a plurality of backlights with the same color, such as white light emitting diodes 2001 or red light emitting diodes. For example, as shown in fig. 3B, 3E and 3H, the backlight modules 20B, 20E and 20H of the display devices 1B, 1E and 1H are each composed of a plurality of white light emitting diodes, so that the backlight modules 20B, 20E and 20H of the display devices 1B, 1E and 1H all emit white light. Compared to the situation where a single backlight source includes three color leds, where the three color leds need to be driven separately, the backlight sources of the backlight modules 20B, 20E, and 20H only include white leds, and thus the required driving power is only one third of that of the former.

In some embodiments, the backlight module may include a plurality of red-green-blue (RGB) light emitting diode backlights 2002, e.g., each backlight includes one red light emitting diode, one green light emitting diode, and one blue light emitting diode. For example, as shown in fig. 3C, 3F and 3I, the backlight modules 20C, 20F and 20I of the display devices 1C, 1F and 1I are each composed of a plurality of RGB light emitting diode backlights 2002, so that the backlight modules 20C, 20F and 20I of the display devices 1C, 1F and 1I can independently control the light emission color thereof.

In some embodiments, the display panel 10 may not include a color filter layer, and thus the color displayed by the sub-pixels of the display panel 10 is completely determined by the backlight design of the backlight module 20. For example, as shown in fig. 3A, 3B, and 3C, none of the display panels 10A, 10B, and 10C of the display devices 1A, 1B, and 1C includes a color filter layer, but can adjust a gradation change.

In some embodiments, the adjacent first sub-pixel 100-1 and the second sub-pixel 100-2 of the first light emitting region 100 may have the same color, which means that the maximum peak difference of the transmission spectrum of the color filter layer is less than 5 nanometers (nm). For example, in one embodiment, the display panel may include a color filter layer, and the portion of the color filter layer corresponding to the first sub-pixel 100-1 and the portion corresponding to the second sub-pixel 100-2 have the same color. For example, as shown in fig. 3D, 3E and 3F, the portions of the color filter layers of the first light-emitting regions 100 of the display panels 10D, 10E and 1F of the display devices 1D, 1E and 1F corresponding to the first sub-pixel 100-1 and the portions corresponding to the second sub-pixel 100-2 have red colors, i.e., the maximum peak difference of the transmission spectra of the red color filter layers thereof is less than 5 nanometers (nm). The color filter layer of the second light emitting area 200 may be blue, for example, and the color filter layer of the third light emitting area 300 may be green, for example.

In some embodiments, the display panel 10 may have a color filter layer, and the color filter layer may include a first color block and a second color block, the first color block is disposed corresponding to the first light emitting region 100, the second color block is disposed corresponding to the second light emitting region 200, different sub-pixels in the first color block may have different colors, and different sub-pixels in the second color block may also have different colors, so that the first light emitting region 100 and the second light emitting region 200 may have different light emitting colors according to the gray scale variation of the display panel. For example, the display panels 10G, 10H, and 1I of the display devices 1G, 1H, and 1I shown in fig. 3G, 3H, and 3I.

Therefore, as shown in fig. 3A, the backlight module 20A of the display device 1A has backlight partitions with different colors, so that the display device 1A can display a color effect according to the design of the backlight partitions. In one embodiment, the display panel 10 does not include a color filter layer, the backlight module 20A has a plurality of backlight areas, the first light-emitting area 100 corresponds to the first backlight area 21, and the second light-emitting area 200 corresponds to the second backlight area 22, so that the first light-emitting area 100 and the second light-emitting area 200 have different light-emitting colors based on the first backlight area 21 and the second backlight area 22 having different light-emitting colors.

As shown in fig. 3B, the backlight module 20B of the display device 1B has a single-color backlight source, so that a gray-scale image is displayed according to the color of the backlight source. For example, the display panel 10B does not include a color filter layer, and the backlight module 20B is composed of a plurality of white light emitting diodes and thus only emits white light, so that the first light emitting area 100 and the second light emitting area 200 have the same light emitting color.

As shown in fig. 3C, the display panel 10C does not include a color filter layer, and the backlight module 20C of the display device 1C includes a plurality of RGB led backlights 2002 that can be controlled respectively, so that the display device 1C can present finer color and pattern variations according to the light emitting color of the backlight module 20C.

For example, as shown in fig. 3D, 3E and 3F, the color filter layer may include a first color zone 1001, a second color zone 1002 and a third color zone 1003, and the first color zone 1001, the second color zone 1002 and the third color zone 1003 are respectively disposed corresponding to the first light emitting zone 100, the second light emitting zone 200 and the third light emitting zone 300. In an embodiment, the first color zone 1001 has, for example, red, the second color zone 1002 has, for example, green, and the third color zone 1003 has, for example, blue, so that the first light emitting zone 100, the second light emitting zone 200, and the third light emitting zone 300 can have different light emitting colors. In another embodiment, quantum dots may be added to the color filter layer to convert incident light entering the color filter layer into emergent light of other colors.

As shown in fig. 3D, the backlight module 20D of the display device 1D has backlight partitions with different colors, the color filter layer of the display device 1D may include a first color partition 1001, a second color partition 1002 and a third color partition 1003, the backlight module 20D has a plurality of backlight areas, the first light-emitting area 100 corresponds to the first backlight area 21, the second light-emitting area 200 corresponds to the second backlight area 22, and the light of the first backlight area 21 may pass through the color partitions, so that the color is more purified or converted into other colors.

As shown in fig. 3E, the backlight module 20E of the display device 1E has a monochromatic backlight source (e.g., a plurality of white light emitting diodes 2001), the color filter layer of the display device 1E may include a first color block 1001, a second color block 1002 and a third color block 1003, the first color block 1001, the second color block 1002 and the third color block 1003 are respectively disposed corresponding to the first light emitting area 100, the second light emitting area 200 and the third light emitting area 300, and the light of the backlight module 20E passes through each color block, so that the first light emitting area 100, the second light emitting area 200 and the third light emitting area 300 have different light emitting colors.

As shown in fig. 3F, the backlight module 20E of the display device 1F includes a plurality of RGB led backlights 2002 that can be controlled respectively, the color filter layer of the display device 1F may include a first color block 1001, a second color block 1002 and a third color block 1003, and the light of each RGB led backlight 2002 of the backlight module 20E passes through each color block, so that the color is more purified or converted into other colors.

As shown in fig. 3G, the backlight module 20G of the display device 1G has backlight partitions with different colors, the color filter layer of the display device 1G may include a plurality of first color sub-blocks 101, second color sub-blocks 102 and third color sub-blocks 103, each of the first color sub-blocks 101, the second color sub-blocks 102 and the third color sub-blocks 103 respectively corresponds to three sub-pixels of one pixel in one light emitting region, for example, one first color sub-block 101, one second color sub-block 102 and one third color sub-block 103 respectively correspond to three sub-pixels of one pixel in the first light emitting region 100. The light in each backlight area (e.g., the first backlight area 21) can pass through the sub-color block, so that the color is more purified or converted into other colors.

As shown in fig. 3H, the backlight module 20H of the display device 1H has a monochromatic backlight source (e.g., a plurality of white light emitting diodes 2001), the color filter layer of the display device 1H may include a plurality of first color sub-blocks 101, second color sub-blocks 102, and third color sub-blocks 103 corresponding to three sub-pixels of a pixel in a light emitting region, respectively, and the light of the backlight module 20H passes through each sub-color sub-block, so that the display device 1H may present finer color and pattern variations according to the arrangement of each sub-color sub-block.

As shown in fig. 3I, the backlight module 20I of the display device 1I includes a plurality of RGB led backlights 2002 that can be controlled respectively, the color filter layer of the display device 1I may include a plurality of first color sub-blocks 101, second color sub-blocks 102, and third color sub-blocks 103 corresponding to three sub-pixels of a pixel in a light emitting region respectively, and light of each RGB led backlight 2002 of the backlight module 20I passes through each sub-color block, so that the display device 1I can present finer color and pattern variations according to the arrangement of each sub-color block.

The element types and display characteristics of the display devices of the embodiments of FIGS. 3A to 3I are listed in tables 1 to 2 below.

In table 1, "Bar" indicates a backlight module having a plurality of backlight areas, "W" indicates a backlight module including white light emitting diodes, "RGB" indicates a backlight module including RGB light emitting diodes, "N/a" indicates that a display panel is not provided with a color filter layer, "CF Bar" indicates that a color filter layer of a display panel has a plurality of color blocks of different colors, "CF RGB" indicates a color filter layer having three different colors respectively corresponding to three sub-pixels, "X" indicates that a color tone/pattern of a display image of the display device cannot be arbitrarily adjusted, "Δ" indicates that a color tone/pattern of a display image of the display device has an adjustment space, "o" indicates that a color tone/pattern of a display image of the display device can be arbitrarily adjusted, "ˇ" indicates that an opaque region should preferably be provided (see the description of fig. 4A to 4B), "optional" indicates that the opaque region may be selectively provided or not provided, and "X3" indicates that the three-dimensional resolution is 3 times that of "X1".

TABLE 1

In table 2, "white power" represents the normalized power of white light emission of the display device, "color power" represents the normalized power of non-white light emission of the display device, and "luminance conversion ratio" represents the ratio of the emission luminance of the display device divided by the luminance of the backlight module, for example, when the luminance of the backlight module is 10000 nits (nits), the emission luminance of the display device with a luminance conversion ratio of 5% is 10000 nits x 5%, "500 nits".

TABLE 2

As shown in tables 1 to 2, in the embodiments of fig. 3C, 3F and 3I, the RGB leds are used as the backlight source to respectively match the display panel without the color filter layer, the color filter layer with a plurality of color blocks with different colors, and the display panel with the common RGB color filter layer, wherein the light emitted by at least two sub-pixels of a single light emitting region (e.g., the first light emitting region 100) has substantially the same color, it can be seen that since the common RGB color filter layer of fig. 3I only allows the light of a single color 1/3 of a pixel to pass through, and the color blocks of the color filter layer of fig. 3F can allow all the light of a single color of a pixel to pass through, the light conversion efficiency of the light of a single color can be improved from 3% to 9%. If the color filter layer is not provided at all, the absorption of light by the color filter layer is further reduced, and thus the light conversion efficiency can be improved from 9% in fig. 3F to 10.8% in fig. 3C. Therefore, it can be seen from the above results that the setting of the color filter layer and the design of the color blocks thereof significantly affect the luminance conversion rate of the backlight module.

As shown in tables 1 to 2, in the embodiments of fig. 3B, 3E and 3H, the white light emitting diode is used as the backlight source to respectively match the display panel without the color filter layer, the color filter layer with a plurality of color blocks with different colors, and the common RGB color filter layer, wherein the light emitted by at least two sub-pixels of a single light emitting region (e.g., the first light emitting region 100) has substantially the same color, and the light conversion efficiency of the light with a single color is increased from 5% in fig. 3H to 15% in fig. 3E, and further to 18% in fig. 3B. Also, the luminance conversion ratios of the single color lights of the embodiments of fig. 3B, 3E, and 3H are all 1.66 times the luminance conversion ratios of the single color lights of the embodiments of fig. 3C, 3F, and 3I, respectively, because the power required for the backlight of the white light emitting diode is lower than the power required for the backlight of the RGB light emitting diode. Therefore, it can be seen from the above results that the backlight type adopted by the backlight module and the design of the backlight area thereof significantly affect the luminance conversion rate of the backlight module.

In some embodiments, the display device of the present disclosure may be applied to an image projection display for displaying augmented reality images in a vehicle or other outdoor displays. The luminance of a display screen of a computer or a mobile phone is about 500 nits, and the luminance of a video projection display for displaying an augmented reality image for a vehicle is about 12000 nits. Therefore, according to the embodiments of the present disclosure, by designing the light emitted by at least two sub-pixels of a single light emitting region (e.g., the first light emitting region 100) to have substantially the same color, the luminance conversion rate is increased from 3% to 9% or even 10.8%, which is equivalent to that the initial luminance of the backlight module can be decreased by 3 times to 3.6 times, for example, from 400000(12000/0.03) nit to 111111 nit (12000/0.108), which is equivalent to that the initial luminance of the backlight module can be decreased by 73%, which is equivalent to that the power consumption of the backlight module is decreased by 73%. Therefore, the display device of the present disclosure is applied to the image projection display for displaying augmented reality images for vehicles, and has the advantage of saving power consumption.

As shown in tables 1 to 2, in the embodiments of fig. 3A, 3D and 3G, the backlight module having a plurality of backlight regions is used as a backlight source to respectively match the display panel without the color filter layer, the color filter layers having a plurality of color blocks with different colors, and the common RGB color filter layers, and the light conversion efficiency of the light with a single color is increased from 3% in fig. 3G to 9% in fig. 3D and further to 10.8% in fig. 3A.

As can be seen from the results of tables 1 to 2, in the embodiments of fig. 3A, 3B and 3C, although the color tone/pattern of the image displayed by the display device of fig. 3A and 3B is substantially only consistent with the existing backlight color and partition design of the backlight module because no color filter layer is provided, the backlight module of the display device of the embodiments of fig. 3A, 3B and 3C has a relatively high luminance conversion rate and has the advantage of saving power.

As can be seen from the results in tables 1 to 2, in the embodiments of fig. 3D, 3E and 3F, although the luminance conversion rate is lower than that of the embodiments of fig. 3A, 3B and 3C due to the color filter layer, the color blocks of the color filter layer and the backlight type of the backlight module are properly matched to match the color and pattern design of the predetermined display image, so as to achieve the display effect with good color tone and pattern.

Fig. 4A is a schematic view illustrating a predetermined display pattern according to an embodiment of the disclosure, and fig. 4B is a schematic view illustrating an arrangement of a light emitting region and an opaque region according to an embodiment of the disclosure. In the embodiments, the same or similar components as those in the previous embodiments are denoted by the same or similar component numbers, and the description of the same or similar components is referred to the foregoing, and will not be repeated herein.

As shown in fig. 4A, in an embodiment, the predetermined display pattern has a first light emitting region 100 presenting green, a second light emitting region 200 presenting blue, a third light emitting region 300 presenting yellow, and a dark region 400 presenting black, each light emitting region includes a plurality of pixels, and the first light emitting region 100 and the second light emitting region 200 have an approximately T-shape. However, in some embodiments, after the light emitted from the backlight module 20 passes through the diffusion film, the light corresponding to each pixel is diffused and may mix with the light corresponding to the adjacent pixel, so that the boundary between two adjacent light emitting areas may generate a color mixture or a blurred pattern boundary with poor contrast.

According to some embodiments of the present disclosure, as shown in fig. 4B, the first light-emitting region 100 and the second light-emitting region 200 are separated from each other by an opaque region 500. In other words, the first light emitting region 100 is not directly adjacent to the second light emitting region 200, but is spaced apart by the opaque region 500. For example, as shown in fig. 4B, the first light emitting region originally has the first light emitting pattern 100P, the second light emitting region originally has the second light emitting pattern 200P, and two pixels at the boundary between the first light emitting pattern 100P and the second light emitting pattern 200P are replaced by the opaque region 500.

Furthermore, as shown in fig. 4B, the opaque regions 500 may be separated from each other between the first light-emitting region 100 and the third light-emitting region 300, and the opaque regions 500 may be separated from each other between the second light-emitting region 200 and the third light-emitting region 300, for example, as shown in fig. 4B, the third light-emitting region originally has the third light-emitting pattern 300P, four pixels at the boundary between the first light-emitting pattern 100P and the third light-emitting pattern 300P are replaced by the opaque regions 500, and four pixels at the boundary between the second light-emitting pattern 200P and the third light-emitting pattern 300P are replaced by the opaque regions 500. Therefore, the condition that the boundary of two adjacent light emitting areas possibly generates color mixing or pattern boundary blurring and poor contrast can be avoided.

In one embodiment, the opaque region 500 may be a light-shielding layer or a plurality of sub-pixels with dark states. For example, in some embodiments, when the light-emitting patterns are all fixed, the opaque region may be a light-shielding layer (e.g., a black matrix) disposed in the display panel. For example, in some other embodiments, when the light-emitting pattern is switched and adjusted according to the user's requirement, the opaque region may be a sub-pixel having a dark state formed by controlling liquid crystal in the display panel.

Fig. 5A is a schematic view illustrating an application of the display device according to an embodiment of the disclosure to an augmented reality, and fig. 5B is another schematic view illustrating an application of the display device according to an embodiment of the disclosure to an augmented reality. In the embodiments, the same or similar components as those in the previous embodiments are denoted by the same or similar component numbers, and the description of the same or similar components is referred to the foregoing, and will not be repeated herein.

As shown in fig. 5A, when the display device according to an embodiment of the present disclosure is applied to an image projection display for displaying augmented reality images in a vehicle, the image emitted by the display device 1 is refracted and reflected by the windshield 610 to form a mirror image display device 620, and further form a virtual image 640 seen by human eyes 630. The distance D1 between the human eye 630 and the windshield 610 is about, for example, 0.7 meters, the distance D2 between the windshield 610 and the mirror image display device 620 is about, for example, 0.3 meters, and the distance D3 between the virtual image 640 and the mirror image display device 620 is less than about 1 meter.

As shown in fig. 5B, when the display device according to an embodiment of the present disclosure is applied to an image projection display for displaying an augmented reality image, an Enlarging projection optics (Enlarging projection optics)650 may be further disposed, and the Enlarging projection optics 650 is disposed corresponding to the display surface of the display device 1. The image emitted from the display device 1 is processed by the enlarging and projecting optical device 650, and then is refracted and reflected by the windshield 610 to form the mirror image display device 620, and further form the virtual image 640 seen by the human eye 630. The distance D1 between the human eyes 630 and the windshield 610 is about 0.7 m, for example, and the distance D2 between the windshield 610 and the mirror image display device 620 is about 1.5-2 m, for example, and the distance D3 between the virtual image 640 and the mirror image display device 620 can be extended to about 30 m by the arrangement of the extended projection optics 650.

Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. A display device, characterized in that the display device comprises:

a panel having a light emitting region including a first sub-pixel, a second sub-pixel and a third sub-pixel, the first sub-pixel, the second sub-pixel and the third sub-pixel being adjacent to each other;

the first sub-pixel has a first frequency spectrum, the second sub-pixel has a second frequency spectrum, the third sub-pixel has a third frequency spectrum, a peak of the first frequency spectrum corresponds to a first wavelength, a peak of the second frequency spectrum corresponds to a second wavelength, a peak of the third frequency spectrum corresponds to a third wavelength, and differences among the first wavelength, the second wavelength and the third wavelength are less than 5 nanometers.

2. The display device according to claim 1, wherein the light emitting region comprises a fourth sub-pixel, a fifth sub-pixel and a sixth sub-pixel, the fourth sub-pixel, the fifth sub-pixel and the sixth sub-pixel are adjacent to each other, the fourth sub-pixel has a fourth spectrum, the fifth sub-pixel has a fifth spectrum, the sixth sub-pixel has a sixth spectrum, a peak of the fourth spectrum corresponds to a fourth wavelength, a peak of the fifth spectrum corresponds to a fifth wavelength, a peak of the sixth spectrum corresponds to a sixth wavelength, and differences among the fourth wavelength, the fifth wavelength and the sixth wavelength are less than 5 nm.

3. The display device of claim 2, wherein the difference between the first wavelength and the fourth wavelength is less than 5 nm.

4. The display device of claim 2, wherein the difference between the second wavelength and the fifth wavelength is less than 5 nm.

5. The display apparatus of claim 2, wherein the difference between the third wavelength and the sixth wavelength is less than 5 nm.

6. The display device of claim 1, further comprising:

a lens layer disposed on the panel.

7. The display device of claim 1, wherein the first sub-pixel, the second sub-pixel and the third sub-pixel belong to a same pixel.

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