Display panel module and display device

Abstract

The present invention discloses a display panel module and a display device, wherein the display panel module includes an upper display panel and a lower display panel. The lower display panel is stacked with the upper display panel, and the lower display panel includes a substrate, a light control layer, and a light focusing layer. The light control layer includes a plurality of light absorbing elements. The light focusing layer includes a plurality of light focusing elements. The light focusing layer is disposed between the light control layer and the upper display panel. The light control layer is disposed between the substrate and the light focusing layer. The vertical projections of the light absorbing elements on the substrate fall within the vertical projections of the light focusing elements on the substrate.

Description

Technical Field

[0001] The present invention relates to a display panel module and a display device. Background Art

[0002] Display technology continues to advance toward thinness, light weight, and high contrast. In some displays, the backlight module is adjusted to make the dark state darker to improve contrast. Alternatively, in some displays, dual display panels are used to enhance contrast. However, because the spatial frequencies of the pixels on the upper and lower display panels are similar, and the upper and lower display panels may be misaligned when aligned, light interference occurs between the upper and lower display panels, forming a Moire pattern that significantly degrades display quality. Summary of the Invention

[0003] The present invention provides a display panel module and a display device, which include an upper display panel and a lower display panel and can avoid or reduce the formation of moiré ripples.

[0004] According to one embodiment of the present invention, a display panel module is provided, comprising an upper display panel and a lower display panel. The lower display panel is stacked with the upper display panel, and the lower display panel comprises a substrate, a light control layer, and a light focusing layer. The light control layer comprises a plurality of light absorbing elements arranged in an array within the light control layer. The light focusing layer comprises a plurality of light focusing elements arranged in an array within the light focusing layer. The light focusing layer is disposed between the light control layer and the upper display panel, and further between the substrate and the light focusing layer. The vertical projections of the light absorbing elements on the substrate fall within the vertical projections of the light focusing elements on the substrate.

[0005] According to an embodiment of the present invention, a display device is provided, including the above-mentioned display panel module and a backlight module. The backlight module is stacked with an upper display panel and a lower display panel, wherein the lower display panel is disposed between the upper display panel and the backlight module.

[0006] Based on the above, the display panel module and display device provided by the embodiments of the present invention utilize a light-gathering layer to offset the light from the backlight module, allowing a portion of the backlight to be emitted from above the light-absorbing element (black matrix), thereby reducing the brightness difference between the black matrix area and the light-transmitting pixel area in the lower display panel, thereby reducing the degree of light interference between the upper and lower display panels, and avoiding or reducing the moiré ripples caused by the alignment offset of the upper and lower display panels.

[0007] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic cross-sectional view of a display device according to an embodiment of the present invention;

[0009] Figure 2 yes Figure 1 A partial plan view of the lower display panel;

[0010] Figure 3 yes Figure 1 A partial cross-sectional schematic diagram of the lower display panel;

[0011] Figure 4 is a partial cross-sectional schematic diagram of a lower display panel according to an embodiment of the present invention;

[0012] Figure 5 yes Figure 4 A partial enlarged view of .

[0013] Explanation of symbols

[0014] 1: Display device

[0015] 10: Backlight module

[0016] 10L: Light

[0017] 100: Lower display panel

[0018] 110, 310: light control layer

[0019] 200: Upper display panel

[0020] AL: Active layer

[0021] BM1~BM3: Light absorption element

[0022] BF: buffer layer

[0023] CL1~CL3: pixel control layer

[0024] CFL: Color resist layer

[0025] CF1~CF3: Color resistance

[0026] DE: drain

[0027] DL: data line

[0028] GE: Gate

[0029] GL: Scanline

[0030] H1, H2: through hole

[0031] LC: Liquid crystal molecules

[0032] LC1, LC2: liquid crystal layer

[0033] ITO1, ITO2: transparent conductive layer

[0034] ILD: Interlayer insulation layer

[0035] PL: Passivation layer

[0036] P1~P3: Polarizing layer

[0037] PE: pixel electrode

[0038] SE: Source

[0039] SM: Shielded Metal

[0040] S1~S4:Substrate

[0041] TFT1, TFT2: switching elements

[0042] TL: Transparent color resist

[0043] VL: Concentrating element DETAILED DESCRIPTION

[0044] Reference Figure 1 , which illustrates a cross-sectional schematic diagram of a display device according to one embodiment of the present invention. The display device 1 includes a backlight module 10, a lower display panel 100, and an upper display panel 200. The lower display panel 100 is disposed between the backlight module 10 and the upper display panel 200. Light beams emitted from the backlight module 10 sequentially pass through the lower display panel 100 and the upper display panel 200.

[0045] The upper display panel 200 includes a polarizing layer P2 , a substrate S3 , a pixel control layer CL2 , a liquid crystal layer LC2 , a transparent conductive layer ITO2 , a color resist layer CFL, a substrate S4 and a polarizing layer P3 stacked in sequence from bottom to top.

[0046] The pixel control layer CL2 includes a plurality of scan lines and a plurality of data lines (not shown) arranged in an array, as well as switching elements TFT2 and pixel electrodes (not shown) corresponding to the plurality of pixels of the upper display panel 200. Each switching element TFT2 is configured to control the voltage difference between the corresponding pixel electrode and the common electrode, thereby controlling the orientation of the corresponding liquid crystal molecules LC in the liquid crystal layer LC2 to determine the light transmittance of each pixel.

[0047] The color resist layer CFL includes a plurality of color resists, and the plurality of pixels of the upper display panel 200 correspond to different color resists (eg Figure 1The color resist CF1 to CF3 shown in the figure are used to display a predetermined color. In one embodiment, the color resist CF1 can be a red color resist, the color resist CF2 can be a green color resist, and the color resist CF3 can be a blue color resist, but the present invention is not limited to this. By controlling the transmittance of each pixel and matching the color of the color resist corresponding to each pixel, the purpose of displaying image (picture) information is achieved. It should be noted that the upper display panel 200 also includes a plurality of light absorbing elements BM2 arranged in an array, corresponding to the plurality of switching elements TFT2 and the boundary configuration between the plurality of pixels, such as the scan lines and the data lines, to block unwanted light and increase the contrast. In one embodiment, the light absorbing element BM2 is a black color resist.

[0048] Also refer to Figure 1 The lower display panel 100 includes a polarizing layer P1, a substrate S1, a pixel control layer CL1, a liquid crystal layer LC1, a transparent conductive layer ITO1, and a substrate S2, stacked in sequence. The lower display panel 100 lacks any color resists, while the upper display panel 200 incorporates color resists CF1-CF3. This is because the image information for the display device 1 is provided by the upper display panel 200, while the lower display panel 100 is used to enhance the contrast of the display device 1.

[0049] The lower display panel 100 also includes a light control layer 110 and a light-collecting layer. The light control layer 110 includes a plurality of light-absorbing elements BM1 arranged in an array within the light control layer 110. In one embodiment, the light-absorbing elements BM1 are black color resists, but the present invention is not limited thereto. The light-collecting layer includes a plurality of light-collecting elements VL arranged in an array within the light-collecting layer. The light-collecting layer is disposed between the light control layer 110 and the upper display panel 200, and between the substrate S1 and the light-collecting layer.

[0050] Please also refer to Figure 1 and Figure 2 , Figure 2 Draws Figure 1 The partial plan view of the lower display panel in FIG. Figure 2 As shown, the pixel control layer CL1 includes a plurality of scan lines GL and a plurality of data lines DL arranged in an array form, and also includes switching elements TFT1 corresponding to a plurality of pixels of the lower display panel 100 .

[0051] It should be noted that although Figure 1 The light control layer 110 is shown in FIG. Figure 2 In an actual implementation, the plurality of light absorbing elements BM1 of the light control layer 110 are arranged corresponding to the plurality of scanning lines GL, the plurality of data lines DL and the plurality of switching elements TFT1 to block unwanted light. In other words, Figure 2A light absorbing element BM1 is arranged between the scan line GL and the light focusing element VL arranged thereon, a light absorbing element BM1 is arranged between the data line DL and the light focusing element VL arranged thereon, and a light absorbing element BM1 is also arranged between the switch element TFT1 and the light focusing element VL arranged thereon.

[0052] The width of the light absorbing element BM1 may be equal to or greater than the width of the corresponding scan line GL, data line DL and switch element TFT1. However, the present invention is not limited thereto, and the width of BM1 may also be smaller than the width of the corresponding scan line GL, data line DL and switch element TFT1.

[0053] The multiple light-concentrating elements VL disposed on the multiple light-absorbing elements BM1 have a greater width than the light-absorbing elements BM1. In one embodiment of the present invention, the width of the light-concentrating elements VL is greater than the width of the corresponding scan lines GL, such that the vertical projection of the scan lines GL on the substrate S1 falls within the vertical projection of the light-concentrating elements VL on the substrate S1. However, the present invention is not limited to this. In one embodiment, the vertical projection of the scan lines GL on the substrate S1 overlaps the vertical projection of the light-concentrating elements VL on the substrate S1.

[0054] In one embodiment of the present invention, the width of the concentrating element VL is greater than the width of the corresponding data line DL, and the vertical projection of the data line DL on the substrate S1 falls within the vertical projection of the concentrating element VL on the substrate S1. However, the present invention is not limited to this. In one embodiment, the vertical projection of the data line DL on the substrate S1 overlaps the vertical projection of the concentrating element VL on the substrate S1.

[0055] exist Figure 1 In the embodiment shown, the vertical projection of the light absorbing element BM1 on the substrate S1 falls within the vertical projection of the corresponding light concentrating element VL on the substrate S1, which allows the light 10L from the backlight module 10 to penetrate the light concentrating element VL. Figure 1 The cross-sectional view of the lens has a plano-convex lens-like profile and has the function of converging light. Therefore, the light 10L passing through the converging element VL changes its direction and exits the converging element VL from above the light absorbing element BM1. Figure 1 In this case, the brightness difference between the area where the light absorbing element BM1 is disposed and the light-transmitting pixel area of the lower display panel 100 is reduced, thereby reducing the degree of light interference between the upper display panel 200 and the lower display panel 100, and avoiding or reducing the moiré ripples caused by the alignment offset between the upper display panel 200 and the lower display panel 100.

[0056] Reference Figure 3 , which depicts Figure 1A partial cross-sectional diagram of the lower display panel in FIG. The pixel control layer CL1 of the lower display panel 100 includes a switching element TFT1 and a pixel electrode PE. The switching element TFT1 includes an active layer AL, a gate electrode GE, a source electrode SE, and a drain electrode DE. A gate insulating layer GI is disposed between the active layer AL and the gate GE, and an interlayer insulating layer ILD is disposed between the source electrode SE and the drain electrode DE and the gate GE. A shielding metal SM corresponding to the active layer AL is disposed on the substrate S1, and a buffer layer BF is disposed between the shielding metal SM and the active layer AL.

[0057] A passivation layer PL is disposed on the source electrode SE and the drain electrode DE. The switching element TFT1 is disposed between the substrate S1 and the passivation layer PL. The passivation layer PL is disposed between the switching element TFT1 and the light absorbing element BM1. The pixel electrode PE is electrically connected to the switching element TFT1 through a through hole H1 in the passivation layer PL.

[0058] The vertical projection of the light absorbing element BM1 on the substrate S1 falls within the vertical projection of the light concentrating element VL on the substrate S1. In one embodiment of the present invention, the light concentrating element VL disposed above the switching element TFT1 is a convex lens or a Fresnel lens, and the diameter of the light concentrating element VL is greater than or equal to the width of the light absorbing element BM1.

[0059] In order to fully illustrate the various embodiments of the present invention, other embodiments of the present invention will be described below. It must be noted that the following embodiments use the component numbers and some of the content of the previous embodiments, wherein the same reference numerals are used to represent the same or similar components, and the description of the same technical content is omitted. For the description of the omitted parts, please refer to the previous embodiments, and the following embodiments will not be repeated.

[0060] Reference Figure 4 and Figure 5 , Figure 4 is a partial cross-sectional schematic diagram of a lower display panel according to an embodiment of the present invention, Figure 5 yes Figure 4 A partial enlarged view of . Figure 4 The lower display panel shown is Figures 1 to 3 The lower display panel 100 shown is the same at least in that the light control layer 310 is arranged between the light focusing layer and the pixel control layer CL3, the light control layer 310 has a plurality of light absorption elements BM3 arranged in an array form, the light focusing layer has a plurality of light focusing elements VL arranged in an array form, and the vertical projection of the light absorption element BM3 on the substrate S1 falls within the vertical projection of the light focusing element VL on the substrate S1. Figure 4The difference between the lower display panel shown and the lower display panel 100 is that the light control layer 310 further includes a transparent color resist TL disposed between the light absorbing elements BM3, and the vertical projection of the focusing element VL on the substrate S1 partially overlaps the vertical projection of the transparent color resist TL on the substrate S1. Figure 5 The transparent color resist TL has a through hole H2 , and the switching element TFT1 is disposed between the substrate S1 and the light control layer 310 , and is connected to the pixel electrode PE through the through hole H2 .

[0061] In summary, the display panel module and display device provided by the embodiments of the present invention utilize a light-gathering layer to offset the light from the backlight module, allowing a portion of the backlight to be emitted from above the light-absorbing element (black matrix), thereby reducing the brightness difference between the black matrix area and the light-transmitting pixel area in the lower display panel, thereby reducing the degree of light interference between the upper and lower display panels, and avoiding or reducing the moiré ripples caused by the alignment offset of the upper and lower display panels.

Claims

1. A display panel module, comprising: upper display panel; as well as A lower display panel is stacked with the upper display panel, and the lower display panel includes: substrate; a light control layer comprising a plurality of light absorbing elements arranged in an array in the light control layer; and A light-gathering layer comprising a plurality of light-gathering elements arranged in an array in the light-gathering layer, the light-gathering layer being arranged between the light-controlling layer and the upper display panel, and the light-controlling layer being arranged between the substrate and the light-gathering layer, The vertical projections of the plurality of light absorbing elements on the substrate fall within the vertical projections of the plurality of light concentrating elements on the substrate.

2. The display panel module as claimed in claim 1 , wherein the lower display panel further comprises a plurality of scan lines disposed between the substrate and the light-gathering layer, and vertical projections of the plurality of scan lines on the substrate overlap vertical projections of the plurality of light-gathering elements on the substrate.

3. The display panel module as claimed in claim 1 , wherein the lower display panel further comprises a plurality of data lines disposed between the substrate and the light-concentrating layer, and vertical projections of the plurality of data lines on the substrate overlap vertical projections of the plurality of light-concentrating elements on the substrate. The display panel module as claimed in claim 1 , wherein the plurality of light absorbing elements are black color resists.

5. The display panel module as claimed in claim 1 , wherein the light control layer further comprises a plurality of transparent color resists disposed between the plurality of light absorbing elements, and the vertical projections of the plurality of light focusing elements on the substrate partially overlap the vertical projections of the plurality of transparent color resists on the substrate.

6. The display panel module according to claim 5, wherein the lower display panel further comprises a switching element and a pixel electrode, the switching element being disposed between the substrate and the light control layer and connected to the pixel electrode via a through hole in the plurality of transparent color resists. 7 . The display panel module according to claim 1 , wherein the plurality of light-concentrating elements are convex lenses or Fresnel lenses, and a diameter of the plurality of light-concentrating elements is greater than or equal to a width of the plurality of light-absorbing elements.

8. The display panel module according to claim 1, wherein the lower display panel further comprises a switching element, a pixel electrode and a passivation layer, the switching element is arranged between the substrate and the passivation layer, the passivation layer is arranged between the switching element and at least one of the plurality of light absorbing elements, and the pixel electrode is connected to the switching element via a through hole in the passivation layer.

9. A display device comprising: The display panel module according to any one of claims 1 to 8; as well as A backlight module is stacked with the upper display panel and the lower display panel, wherein the lower display panel is disposed between the upper display panel and the backlight module.

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