Display device

Abstract

A display device includes a transflective display panel, a backlight module, and a light-adjusting panel disposed between the transflective display panel and the backlight module. The transflective display panel has a plurality of sub-pixel and includes a first substrate, a second substrate, a first circuit layer disposed on a surface of the first substrate, a plurality of reflective electrodes disposed on the first circuit layer, a first color filter layer including a plurality of color filters and disposed on a surface of the second substrate, and a first liquid crystal layer disposed between the color filters and the reflective electrodes. Each of the reflective electrodes respectively has an opening, and each of the color filters respectively corresponds to one of the reflective electrodes and is disposed within a sub-pixel. The light-adjusting panel includes a third substrate, a fourth substrate, a second circuit layer disposed on a surface of the third substrate, and a second liquid crystal layer disposed between the second circuit layer and the fourth substrate.

Description

Technical Field

[0001] This invention relates to a display device, and more particularly to a transmissive and reflective display device. Prior Technology

[0002] With the development of technology, various types of display devices have emerged. Among them, transflective display devices utilize ambient light as part of the light source to achieve the display effect, thus offering the advantage of low power consumption. Currently, many electronic products, such as writing tablets, e-books, tablet PCs, and laptops, use transflective display panels. However, in traditional transflective display devices, only the opening of the reflective electrode allows light from the backlight module to pass through, resulting in reduced image contrast. Furthermore, to improve reflectivity, the color filter layer in transflective display devices needs to be thinner, leading to reduced color saturation and impacting the user experience. Therefore, improving the contrast and color saturation of transflective display devices is one of the objectives of this invention. Summary of the Invention

[0003] The technical problem to be solved by this invention is how to improve the contrast and color saturation of transmissive and reflective display devices.

[0004] To address the aforementioned technical problems, the present invention provides a display device comprising a semi-transparent reflective display panel, a backlight module disposed on one side of the semi-transparent reflective display panel, and a dimming panel disposed between the semi-transparent reflective display panel and the backlight module. The semi-transparent reflective display panel has a plurality of sub-pixels and includes a first substrate, a second substrate disposed opposite to the first substrate, a first circuit layer disposed on a surface of the first substrate, a plurality of reflective electrodes disposed on the first circuit layer, a first color filter layer including a plurality of color filters and disposed on a surface of the second substrate, and a first liquid crystal layer disposed between the color filters and the reflective electrodes. Each reflective electrode includes an opening, and each color filter corresponds to one of the reflective electrodes and is located within one of the sub-pixels. The dimming panel includes a third substrate, a fourth substrate disposed opposite to the third substrate, a second circuit layer disposed on a surface of the third substrate, and a second liquid crystal layer disposed between the second circuit layer and the fourth substrate.

[0005] This invention improves the contrast of a display device by placing a dimming panel between a transflective display panel and a backlight module. Furthermore, according to one embodiment of the invention, the dimming panel may also include a second color filter layer, thereby enhancing the color saturation of the display device. Simple Explanation of the Diagram

[0006] Figure 1 shows a cross-sectional schematic diagram of a first embodiment of the display device of the present invention. Figure 2 shows an exploded view of the structural configuration of a first embodiment of the display device of the present invention. Figure 3 shows a cross-sectional schematic diagram of a second embodiment of the display device of the present invention. Figure 4 shows an exploded view of the structural configuration of a second embodiment of the display device of the present invention. Figure 5 shows a cross-sectional schematic diagram of a third embodiment of the display device of the present invention. Figure 6 shows an exploded view of the structural configuration of a third embodiment of the display device of the present invention. Figure 7 shows a cross-sectional schematic diagram of a fourth embodiment of the display device of the present invention. Figure 8 shows an exploded view of the structural configuration of a fourth embodiment of the display device of the present invention. Implementation

[0007] To enable those skilled in the art to further understand the present invention, preferred embodiments of the present invention are described below, along with a detailed description of the invention's structure and desired effects in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are simplified schematic diagrams; therefore, only elements and combinations related to the present invention are shown to provide a clearer description of the basic structure or implementation method of the present invention, while the actual elements and layout may be more complex. Furthermore, for ease of explanation, the elements shown in the various drawings of the present invention are not drawn to scale according to the actual number, shape, and size; the detailed scale can be adjusted according to design requirements.

[0008] Please refer to Figure 1, which illustrates a cross-sectional schematic diagram of a first embodiment of the display device of the present invention. The first embodiment of the present invention provides a display device 100, comprising a half-transflective display panel 110, a backlight module 120, and a dimming panel 130, wherein the backlight module 120 is disposed on one side of the half-transflective display panel 110, and the dimming panel 130 is located between the half-transflective display panel 110 and the backlight module 120. The half-transflective display panel 110 has a plurality of sub-pixels SP, and the half-transflective display panel 110 includes a first substrate 111, a first circuit layer 115, a plurality of reflective electrodes RE, a first color filter layer 117, a first liquid crystal layer LC1, and a second substrate 113 arranged sequentially from bottom to top. The second substrate 113 is disposed opposite to the first substrate 111. A first circuit layer 115 is disposed on a surface 111S of the first substrate 111. A reflective electrode RE is disposed on the first circuit layer 115. A first color filter layer 117 includes a plurality of color filters CF and is disposed on a surface 113S of the second substrate 113. A first liquid crystal layer LC1 is disposed between the color filters CF and the reflective electrodes RE. Each reflective electrode RE includes an opening OP1. Each color filter CF corresponds to one of the reflective electrodes RE and is located within one of the sub-pixels SP. In other words, each reflective electrode RE corresponds to one sub-pixel SP. The dimming panel 130 includes a third substrate 131, a second circuit layer 135, a second liquid crystal layer LC2, and a fourth substrate 133 arranged sequentially from bottom to top. The fourth substrate 133 is disposed opposite to the third substrate 131, the second circuit layer 135 is disposed on a surface 131S of the third substrate 131, and the second liquid crystal layer LC2 is disposed between the second circuit layer 135 and the fourth substrate 133.

[0009] As shown in Figure 1, the dimming panel 130 has a plurality of dimming zones LARs, and the second circuit layer 135 of the dimming panel 130 may selectively include a plurality of switching elements SW1 corresponding to one of the dimming zones LARs to control the opening and closing of the corresponding dimming zone LAR. In other words, a dimming zone LAR may include one switching element SW1. In detail, the second circuit layer 135 of the dimming panel 130 may also include a plurality of data lines (not shown), a plurality of scan lines (not shown), and a plurality of transparent electrodes (not shown), electrically connected to the corresponding switching elements SW1. The scanning lines can control the opening and closing of the corresponding switching elements SW1, thereby controlling the opening and closing of the dimming zone LAR through the corresponding transparent electrodes, and providing a grayscale value of the dimming zone LAR through the data lines. For example, when the switching element SW1 is turned on, the corresponding dimming area LAR can be in a transparent state, and when the switching element SW1 is turned off, the corresponding dimming area LAR can be in an opaque state, or it can be designed to be the opposite. Furthermore, the dimming panel 130 can also be designed so that the dimming area LAR has different levels of transmittance depending on the signal provided by the data line. Additionally, as shown in Figure 1, the dimming panel 130 may also include a black matrix layer BML and a cover layer OC, wherein the black matrix layer BML is disposed on a surface 133S of the fourth substrate 133, the black matrix layer BML has a plurality of openings OP2 each corresponding to one of the dimming areas LAR, and the cover layer OC is disposed in the openings OP2 of the black matrix layer BML. It is worth noting that, as shown in Figure 1, the width W1 of the dimming area LAR in direction Dx is greater than the width W2 of the color filter CF in direction Dx; in other words, the size of any dimming area LAR is greater than the size of any color filter CF, that is, the size of each dimming area LAR is greater than the size of any sub-pixel SP. For example, the width W1 can be approximately three times the width W2 or slightly more than three times the width W2, but is not limited to this.

[0010] Furthermore, in the embodiment shown in Figure 1, the first circuit layer 115 of the transflective display panel 110 includes a plurality of switching elements SW2, a plurality of data lines (not shown), a plurality of scan lines (not shown), and a plurality of pixel electrodes (not shown), electrically connected to the corresponding switching elements SW2, and each pixel electrode can be electrically connected to one of the reflective electrodes RE. The scanning lines control the opening and closing of the corresponding switching elements SW2, thereby controlling the opening and closing of the sub-pixels SP through the corresponding pixel electrodes, and providing a grayscale value for the sub-pixels SP through the data lines. In addition, the color filter CF of the first color filter layer 117 may include a plurality of first color filters CF1, a plurality of second color filters CF2, and a plurality of third color filters CF3. The first color filters CF1, second color filters CF2, and third color filters CF3 are filters of different colors, such as red, green, and blue filters, but are not limited thereto. In this embodiment, the sub-pixel SP corresponding to the first color filter CF1 is the first sub-pixel SP1, the sub-pixel corresponding to the second color filter CF2 is the second sub-pixel SP2, and the sub-pixel SP corresponding to the third color filter CF3 is the third sub-pixel SP3. For example, the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 are respectively a red sub-pixel, a green sub-pixel, and a blue sub-pixel, but this is not a limitation. Furthermore, the first color filter layer 117 may also include a black matrix BM disposed between any two adjacent color filters CF to reduce the problem of cross-interference between different colors of light between sub-pixels SP. The ambient light reflected by the reflective electrode RE and / or the light generated by the backlight module 120 passes through the opening OP1 of the reflective electrode RE and then through the different colors of the color filters CF of the first color filter layer 117, enabling the display device 100 to display a color image.

[0011] The backlight module 120 is disposed on the side of the dimming panel 130 opposite to the transflective display panel 110. The light generated by the module can be emitted from its upper surface and provided as a light source for the transflective display panel 110 through the dimming panel 130. In this embodiment, the backlight module 120 can be turned on or off depending on the display mode. For example, in the transmissive mode of the display device 100, the backlight module 120 can be turned on to provide a backlight source, and the generated light can pass through the opening OP1 of the reflective electrode RE to provide a light source for the sub-pixel SP to display an image. In the reflective mode of the display device 100, the backlight module 120 can be turned off and no light source can be provided. At this time, the transflective display panel 110 can use ambient light to display an image, but the present invention is not limited to the above.

[0012] Please refer to Figure 2, and simultaneously to Figure 1, where Figure 2 shows an exploded view of the structural configuration of a first embodiment of the display device of the present invention. It should be noted that, to simplify the drawings and clearly illustrate the features of the present invention, Figure 2 only shows the configuration of the backlight module 120, the sub-pixels SP of the transflective display panel 110 and their corresponding reflective electrodes RE, and the range of the dimming zones LAR of the dimming panel 130, while omitting other components of the dimming panel 130 and the transflective display panel 110 (e.g., the first substrate 111, the third substrate 131, the switching element SW1, the switching element SW2, etc.). According to the present invention, the dimming panel 130 can control the opening and closing of each dimming zone LAR separately, thereby increasing the brightness difference between each dimming zone LAR, which in turn increases the brightness difference between the sub-pixels SP corresponding to different dimming zone LARs, thereby improving the contrast of the display device 100. In detail, multiple sub-pixels SP can correspond to one dimming area LAR. For example, three sub-pixels SP1, SP2, and SP3 of different colors correspond to one dimming area LAR, but this is not a limitation. The number of sub-pixels SP corresponding to the dimming area LAR can be changed according to actual design needs. The backlight brightness of the corresponding sub-pixels SP can be determined according to the light transmission state of the dimming area LAR. Taking Figure 2 as an example, dimming area LAR1 is opaque or has low light transmission (represented by a diagonal grid pattern in Figure 2), while dimming area LAR2, which is adjacent to dimming area LAR1 in direction Dy or direction Dx, is transparent (represented by a pattern without a grid in Figure 2). Since the brightness difference between dimming area LAR1 and dimming area LAR2 is large, the sub-pixels SP corresponding to dimming area LAR1 and dimming area LAR2 will also have a large brightness difference, thus improving the contrast of the display device 100. In this embodiment, direction Dy can be perpendicular to direction Dx.

[0013] Please refer to Figure 1. As shown in Figure 1, in this embodiment, the number of switching elements SW2 in the first circuit layer 115 of the transflective display panel 110 is greater than the number of switching elements in the second circuit layer 135 of the dimming panel 130. In other words, the number of sub-pixels SP in the display device 100 is greater than the number of dimming zones LAR, meaning that one dimming zone LAR can correspond to multiple sub-pixels SP. In the embodiment of Figure 1, one dimming zone LAR can correspond to three sub-pixels SP, but this is not a limitation. In one embodiment, one dimming zone LAR can correspond to 300 sub-pixels SP, but this is not a limitation. In another embodiment, the transflective display panel 110 can have a resolution of 1920×1080, that is, 5760×3240 sub-pixels SP, while the dimming panel 130 can have 480×360 dimming zone LARs, but this is not a limitation. In yet another embodiment, the transflective display panel 110 may have a resolution of 1920×1080, which is 5760×3240 sub-pixels, while the dimming panel 130 may have 384 dimming zones (LARs), but is not limited thereto.

[0014] Furthermore, as shown in Figure 1, the transflective display panel 110, the dimming panel 130, and the backlight module 120 can be manufactured independently. The transflective display panel 110 is then fixed to the upper side of the dimming panel 130 via a first adhesive layer AD1, and the backlight module 120 is fixed to the lower side of the dimming panel 130 via a second adhesive layer AD2, thereby forming the display device 100. In the embodiment shown in Figure 1, the first adhesive layer AD1 and the second adhesive layer AD2 may contain adhesive tape, such as double-sided tape, but are not limited thereto. In some embodiments, the first adhesive layer AD1 may also contain optically clear adhesive as shown in Figure 3, applied across the entire surface between the transflective display panel 110 and the dimming panel 130, but is not limited thereto.

[0015] The first substrate 111, second substrate 113, third substrate 131, and fourth substrate 133 may comprise rigid or flexible substrates. Rigid substrates may include, for example, glass, ceramic, quartz, or sapphire, while flexible substrates may include, for example, polyimide (PI), polycarbonate (PC), polyethylene terephthalate (PET), or poly(methyl methacrylate) (PMMA), but are not limited thereto. In this embodiment, the material of the capping layer OC may comprise a colorless material, but is not limited thereto. The reflective electrode RE may comprise a highly reflective metal, such as silver, aluminum, the aforementioned alloys, or other suitable materials, but is not limited thereto. Switching elements SW1 and SW2 may comprise thin-film transistors, but are not limited thereto. In this embodiment, the first liquid crystal layer LC1 may comprise the same liquid crystal material as the second liquid crystal layer LC2, but is not limited thereto. In some embodiments, the first liquid crystal layer LC1 may comprise a liquid crystal material different from the second liquid crystal layer LC2. The backlight module 120 may include, for example, a direct-lit backlight, a side-lit backlight, or other suitable backlight.

[0016] The display device of the present invention is not limited to the embodiments described above. Other embodiments of the present invention will be disclosed below; however, for the sake of simplifying the description and highlighting the differences between the embodiments, the same reference numerals are used to refer to the same components, and repeated parts will not be described again. In addition, the following embodiments can achieve the effects of the first embodiment.

[0017] Please refer to Figures 3 and 4 together. Figure 3 shows a cross-sectional schematic diagram of the second embodiment of the display device of the present invention, and Figure 4 shows an exploded view of the structural configuration of the second embodiment of the display device of the present invention. As shown in Figure 4, the difference between the display device 200 provided in this embodiment and the display device 100 shown in Figure 1 is that the backlight module 220 is a locally dimming backlight module, which may include a plurality of light-emitting elements LE and a plurality of backlight switching elements SWL, and each light-emitting element LE is electrically connected to a corresponding backlight switching element SWL. Furthermore, as shown in Figure 4, each light-emitting element LE may correspond to a light-emitting area LER, and the backlight switching element SWL can control the opening and closing of the light-emitting element LE, that is, each backlight switching element SWL can independently control the opening and closing of the corresponding light-emitting area LER. The light-emitting element LE may include an organic light-emitting diode (OLED), a mini LED, or a micro LED, but is not limited thereto.

[0018] As shown in Figures 3 and 4, in this embodiment, one light-emitting area (LER) corresponds to one dimming area (LAR). That is, the number of light-emitting areas (LER) can be the same as the number of dimming areas (LAR). In other words, the number of switching elements (SW1) in the second circuit layer 135 can be equal to the number of backlight switching elements (SWL), but this is not limited to this. In some embodiments, one light-emitting area (LER) can correspond to multiple dimming areas (LAR). That is, the number of light-emitting areas (LER) can be less than the number of dimming areas (LAR), meaning the number of switching elements (SW1) in the second circuit layer 135 is greater than the number of backlight switching elements (SWL), but this is not limited to this. In this embodiment, by controlling the opening and closing of each light-emitting area (LER) and controlling the opening and closing or light transmission state of each dimming area (LAR), the brightness difference of light passing through each dimming area (LAR) can be increased, thereby increasing the brightness difference between the corresponding sub-pixels (SP) and improving the contrast of the display device 200.

[0019] Furthermore, as shown in Figure 3, another difference between this embodiment and the display device 100 shown in Figure 1 is that the first adhesive layer AD1 of the display device 200 may include optical adhesive, which is coated across its entire surface between the semi-reflective display panel 110 and the dimming panel 130, but is not limited thereto. For example, in a variant embodiment, the first adhesive layer AD1 of the display device 200 may also include octane adhesive. Other parts of the display device 200 in this embodiment can be referred to in the first embodiment described above, and will not be repeated here.

[0020] Please refer to Figures 5 and 6. Figure 5 shows a cross-sectional schematic diagram of the third embodiment of the display device of the present invention, and Figure 6 shows an exploded view of the structural configuration of the third embodiment of the display device of the present invention. For the sake of simplicity, only the second color filter layer 337 is shown in the dimming panel 330 in Figure 6, and only the configuration of the reflective electrode RE and the sub-pixel SP is shown in the transflective display panel 110, omitting other components. As shown in Figures 5 and 6, the difference between the display device 300 provided in this embodiment and the display device 100 shown in Figure 1 is that the dimming panel 330 in this embodiment further includes a second color filter layer 337 disposed between the second liquid crystal layer LC2 and the fourth substrate 133. The second color filter layer 337 may include a plurality of color filters CF', wherein, in a top view TD of the display device 300, the color filters CF' of the second color filter layer 337 are respectively superimposed on one of the color filters CF of the first color filter layer 117. In detail, as shown in Figure 5, the color filter CF' may also include a plurality of first color filters CF4, a plurality of second color filters CF5, and a plurality of third color filters CF6. In the top-view direction TD, the first color filters CF4 of the second color filter layer 337 may overlap with the first color filter CF1 of the first color filter layer 117, the second color filters CF5 may overlap with the second color filter CF2, and the third color filters CF6 may overlap with the third color filter CF3. The second color filter layer 337 may also include a black matrix BM' disposed between any two adjacent color filters CF' to reduce light interference issues.

[0021] The color of the color filter CF' of the second color filter layer 337 can be the same as the corresponding first color filter CF1, second color filter CF2, or third color filter CF3. For example, the first color filter CF4, second color filter CF5, and third color filter CF6 can be red, green, and blue filters, respectively, but this is not a limitation. In this embodiment, the first color filter CF4, second color filter CF5, and third color filter CF6 of the second color filter layer 337 can each contain the same material as the first color filter CF1, second color filter CF2, and third color filter CF3 of the first color filter layer 117, but this is not a limitation. In other embodiments, the first color filter CF4, second color filter CF5, and third color filter CF6 of the second color filter layer 337 can each contain a different material than the first color filter CF1, second color filter CF2, and third color filter CF3 of the first color filter layer 117.

[0022] In this embodiment, by providing a second color filter layer 337 in the dimming panel 330, the light emitted by the backlight module 120 first passes through the color filter CF' of the second color filter layer 337, then through the opening OP1 of the reflective electrode RE, and finally through the color filter CF of the corresponding first color filter layer 117, thus improving the color saturation of the display device 300. Furthermore, the switching element SW1 of the dimming panel 330 can control the on / off state or light transmission state of each dimming zone LAR, increasing the brightness difference between each dimming zone LAR. Therefore, the sub-pixels SP of the dimming zone LARs corresponding to different light transmission states have a larger brightness difference, thereby improving the contrast of the display device 200. Other parts of the display device 300 in this embodiment can be referred to in the above embodiment, and will not be described in detail here.

[0023] Please refer to Figures 7 and 8 together. Figure 7 shows a cross-sectional schematic diagram of the fourth embodiment of the display device of the present invention, and Figure 8 shows an exploded view of the structural configuration of the fourth embodiment of the display device of the present invention. As shown in Figure 8, the difference between the display device 400 provided in this embodiment and the display device 300 shown in Figure 5 is that the backlight module 420 may include a plurality of light-emitting elements LE and a plurality of backlight switching elements SWL as shown in Figure 4, and the light-emitting elements LE are electrically connected to one of the backlight switching elements SWL respectively. As shown in Figure 8, a light-emitting area LER may include a plurality of light-emitting elements LE, and each backlight switching element SWL can control the opening and closing of the corresponding light-emitting element LE, thereby controlling the opening and closing of each light-emitting area LER. In a variant embodiment, the plurality of light-emitting elements LE of a light-emitting area LER may be electrically connected to the same backlight switching element SWL, that is, one backlight switching element SWL can control the opening and closing of all light-emitting elements LE of a single light-emitting area LER, but this is not a limitation. As shown in Figure 7, in this embodiment, one light-emitting area (LER) can correspond to three dimming areas (LAR), meaning that the number of switching elements (SW1) in the second circuit layer 135 is greater than the number of backlight switching elements (SWL), but this is not the only limitation. In this embodiment, by controlling the opening and closing or light-transmitting state of the light-emitting area (LER) and controlling the opening and closing of the dimming areas (LAR), the brightness difference between each dimming area (LAR) is increased. Therefore, the brightness difference between sub-pixels (SP) corresponding to different dimming areas (LAR) can be increased, thereby improving the contrast of the display device 400. In addition, by providing a second color filter layer 337 in the dimming panel 330, the light emitted by the backlight module 420 will first pass through the color filter CF' of the second color filter layer 337, then through the opening OP1 of the reflective electrode RE, and finally through the color filter CF of the corresponding first color filter layer 117, thus improving the color saturation of the display device 400. Other parts of the display device 400 in this embodiment can be referred to the above embodiment, and will not be described in detail here.

[0024] In summary, in the display device of the present invention, by setting a dimming panel between the transflective display panel and the backlight module and controlling the opening and closing or light transmission state of the dimming areas, the brightness difference between each dimming area can be increased. Therefore, the brightness difference between sub-pixels corresponding to different dimming areas can be increased, thereby improving the contrast of the display device. Furthermore, according to an embodiment of the present invention, the backlight module can be a locally dimming backlight module, comprising a plurality of light-emitting areas, and each light-emitting area includes one or more light-emitting elements and at least one backlight switching element. Each backlight switching element can control the opening and closing of its corresponding light-emitting area, thereby increasing the brightness difference between each dimming area and further improving the contrast of the display device. As can be seen from the above, in the display device of the present invention, the number of dimming areas of the dimming panel can be less than or equal to the number of sub-pixels of the transflective display panel, and the number of light-emitting areas of the locally dimmable backlight module can be less than or equal to the number of dimming areas. However, the number of at least one of the sub-pixels, dimming areas, and light-emitting areas is different from the number of the other two; this design can improve image contrast. Furthermore, according to the present invention, the dimming panel may also include a second color filter layer. The light emitted by the backlight module will first pass through the color filter of the second color filter layer, and then through the color filter of the corresponding first color filter layer, thereby improving the color saturation of the display device. The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made in accordance with the claims of the present invention shall be covered by the present invention.

[0025] 100, 200, 300, 400: Display devices 110: Half-reflected display panel 111: First substrate 111S, 113S, 131S, 133S: Surface 113: Second substrate 115: First Circuit Layer 117: First color filter layer 120, 220, 420: Backlight Module 130, 330: Dimming panel 131: Third substrate 133: Fourth substrate 135: Second Circuit Layer 337: Second color filter layer AD1: First adhesive layer AD2: Second adhesive layer BM,BM': Black Matrix BML: Black Matrix Layer CF,CF': Color filters CF1, CF4: First color filters CF2, CF5: Second color filters CF3, CF6: Third color filters Dx, Dy: Direction LAR, LAR1, LAR2: Dimming areas LC1: First liquid crystal layer LC2: Second liquid crystal layer LE: Light-emitting element LER: Light-emitting area OC: Overlay OP1, OP2: Openings RE: Reflective Electrode SP: Subpixel SP1: First sub-pixel SP2: Second subpixel SP3: Third subpixel SW1, SW2: Switching elements SWL: Backlight Switch Component TD: View from above W1, W2: Width

Claims

1. A display device comprising: a semi-transparent reflective display panel having a plurality of sub-pixels, comprising: a first substrate; a second substrate disposed opposite to the first substrate; a first circuit layer disposed on a surface of the first substrate; a plurality of reflective electrodes disposed on the first circuit layer, each of the reflective electrodes comprising an opening; a first color filter layer comprising a plurality of color filters disposed on a surface of the second substrate, each of the color filters corresponding to one of the reflective electrodes and located within one of the sub-pixels; and a first liquid crystal layer disposed between the color filters and the reflective electrodes; a backlight module disposed on one side of the semi-transparent reflective display panel; and a dimming panel disposed between the semi-transparent reflective display panel and the backlight module, the dimming panel comprising: a third substrate; a fourth substrate disposed opposite to the third substrate; a second circuit layer disposed on a surface of the third substrate; and a second liquid crystal layer disposed between the second circuit layer and the fourth substrate. The dimming panel has a plurality of dimming zones, and the second circuit layer includes a plurality of switching elements, each corresponding to one of the dimming zones, to control the opening and closing of the corresponding dimming zone.

2. The display device as claimed in claim 1, wherein the dimming panel further comprises: a black matrix layer disposed on a surface of a fourth substrate, wherein the black matrix layer has a plurality of openings, each corresponding to one of the dimming areas; and a cover layer disposed within the openings of the black matrix layer; wherein, The size of any of these dimming zones is larger than the size of any of these color filters.

3. The display device as claimed in claim 1, wherein the first circuit layer includes a plurality of switching elements, and the number of the switching elements in the first circuit layer is greater than the number of the switching elements in the second circuit layer.

4. The display device as claimed in claim 1, wherein the dimming panel further includes a second color filter layer disposed between the second liquid crystal layer and the fourth substrate.

5. The display device as claimed in claim 4, wherein the second color filter layer comprises a plurality of color filters, wherein, in a top view of the display device, the color filters of the second color filter layer are respectively superimposed on one of the color filters of the first color filter layer.

6. The display device as claimed in claim 5, wherein the color filters of the first color filter layer comprise a plurality of first color filters, a plurality of second color filters, and a plurality of third color filters, and the colors of the color filters of the second color filter layer are each the same as the corresponding first color filter, the second color filter, or the third color filter.

7. The display device as claimed in claim 1, wherein the backlight module includes a plurality of light-emitting elements and a plurality of backlight switching elements, and the light-emitting elements are electrically connected to one of the backlight switching elements.

8. The display device as claimed in claim 7, wherein the number of such switching elements is greater than or equal to the number of such backlight switching elements.

9. The display device as claimed in claim 1, further comprising a first adhesive layer disposed between the transflective display panel and the dimming panel, and a second adhesive layer disposed between the dimming panel and the backlight module.

Images