TWI646511B - Mosaic display device - Google Patents

Abstract

A spliced display device includes a first display panel, a second display panel, and an optical unit. The optical unit is disposed on the first display panel, the stitching seam, and the second display panel. The first display panel includes a first sub-pixel and a second sub-pixel. The second display panel includes a third sub-pixel and a fourth sub-pixel. The second sub-pixel is located between the stitching seam and the first sub-pixel. The fourth sub-pixel is located between the stitching seam and the third sub-pixel. The optical unit includes a transparent substrate, a reflective sheet, and a transflective sheet. The reflection sheet is arranged on the splicing seam. The transflective sheet is disposed on the inclined surface of the transparent substrate and overlaps at least a portion of the second sub-pixel and at least a portion of the fourth sub-pixel, respectively.

Description

Mosaic display device

The present invention relates to a display device, and more particularly, to a spliced display device.

In order to meet the needs of users to display a variety of shared information and comprehensive information in a large area. The spliced display device with multiple display panel integration has been widely used in various fields. For example, a mosaic display device is commonly used in the field of public information display (such as large-scale advertisements, monitoring and management screens, etc.) or in the field of private information display (such as mobile phones, etc.).

However, the spliced display device usually has the problem of discontinuous display screens overall, which affects the viewing quality.

The invention provides a spliced display device with better display effect.

The mosaic display device of the present invention includes a first display panel, a second display panel, and an optical unit. The first display panel includes a first display area having a plurality of first sub-pixels and at least a first area having a plurality of second sub-pixels. Second display panel package A second display area including a plurality of third sub-pixels and at least a second area including a plurality of fourth sub-pixels. There is a splicing seam between at least one side of the second display panel adjacent to the first display panel and the first display panel. The second sub-pixel in the first area is located between the stitching seam and the first sub-pixel in the first display area. The fourth sub-pixel in the second area is located between the stitching seam and the third sub-pixel in the second display area. The optical unit is disposed on the first display panel, the stitching seam, and the second display panel. The optical unit includes a transparent substrate, a reflective sheet, and a transflective sheet. The transparent substrate is disposed on the first display panel, the stitching seam, and the second display panel. The transparent substrate overlaps at least a portion of the second sub-pixel in the first region and at least a portion of the fourth sub-pixel in the second region. The transparent substrate has a top surface and a bottom surface, and the top surface has at least two inclined surfaces and a plane located between the at least two inclined surfaces. The reflection sheet is arranged on the splicing seam. The reflection sheet has a scattering surface, and a plane of the top surface of the transparent substrate overlaps at least a part of the reflection sheet. The transflective sheet is disposed on the first display panel and the second display panel, respectively. The semi-transmissive and semi-reflective sheet overlaps at least a part of the second sub-pixel in the first region and at least a part of the fourth sub-pixel in the second region, respectively. The semi-transparent and semi-reflective sheets are respectively disposed on the inclined surfaces of the transparent substrate.

Based on the above, a mosaic display device according to an embodiment of the present invention utilizes a transflective sheet and a reflection sheet of an optical unit. The mosaic display device can guide part of the light from the second sub-pixel and the fourth sub-pixel to the boundary area. Light is emitted from above and the overall thickness of the spliced display device is thin.

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

10‧‧‧ Upper substrate

10 ’, 20’‧‧‧ outer surface

20‧‧‧ lower substrate

30‧‧‧Display media

100‧‧‧ the first display panel

100b ~ 100d, 200a ~ 200d‧‧‧side

110‧‧‧ first sub pixel

120‧‧‧ second sub-pixel

152, 154‧‧‧‧Brightness attenuation film

162, 164‧‧‧ transparent substrate

162a, 164a, 310a‧‧‧ Top

162b, 164b, 310b‧‧‧ Underside

162c, 164c, 310a-1, 310a-2‧‧‧ bevel

162d, 164d, 310c-1, 310c-2‧‧‧ side

200‧‧‧Second display panel

210‧‧‧ third sub pixel

220‧‧‧ fourth sub pixel

300‧‧‧ Optical unit

310‧‧‧ transparent substrate

310a-3‧‧‧plane

320‧‧‧Reflector

320a‧‧‧ scattering surface

330A, 330B ‧‧‧Transflective sheet

1000, 1000A‧‧‧Mosaic display device

1000a, 1000b ‧‧‧ border area

A‧‧‧display area

A1‧‧‧The first display area

A2‧‧‧Second display area

I-I’‧‧‧ hatched

B1‧‧‧ District 1

B2‧‧‧Second District

f1, f2‧‧‧ edge

H1‧‧‧ height

L, L1, L2‧‧‧‧light

P1, P2‧‧‧polarizing plates

S‧‧‧ splicing seam

P‧‧‧ lens layer

T, t, tg, tp, t1‧‧‧thickness

Wb, Wp‧‧‧Width

x, y, z, d1, d2‧‧‧ directions

θ, θ1, θ2‧‧‧ angle

1 is a schematic top view of a mosaic display device according to an embodiment of the present invention; FIG. 2 is a schematic cross-sectional view of a mosaic display device according to an embodiment of the present invention; FIG. 3 is an enlarged schematic view of a part of the mosaic display device of FIG. 2; A schematic cross-sectional view of a mosaic display device of a comparative example; FIG. 5 simulates the relative intensity of light L on the boundary area of the mosaic display device at an acute angle θ = 35.5 °; FIG. 6 simulates the boundary area of the mosaic display device at an acute angle θ = 36 ° Relative intensity of light L on the surface; FIG. 7 simulates the relative intensity of light L on the boundary area of the mosaic display device at an acute angle θ = 36.5 °; FIG. 8 simulates the light of L on the boundary area of the mosaic display device at an acute angle θ = 36.5 ° Relative intensity; FIG. 9A simulates the brightness of light L on the boundary area and its sub-pixels at a viewing angle of 0 ° according to an embodiment of the present invention; FIG. 9B simulates the boundary area and its sub-pictures at a viewing angle of 15 ° according to an embodiment of the present invention Brightness of light L on a prime; FIG. 9C simulates the brightness of light L on the border area and its two sub-pixels at a viewing angle of 30 ° according to an embodiment of the present invention; FIG. 9D simulates the border area and its brightness at a 45 ° viewing angle of an embodiment of the present invention Light L on both sub pixels Brightness; FIG. 10 is a light field type for simulating the mosaic display device of FIGS. 9A to 9D; FIG. 11 is a schematic cross-sectional view of a mosaic display device according to another embodiment of the present invention.

In the drawings, the thicknesses of layers, films, panels, regions, etc. are exaggerated for clarity. Throughout the description, the same reference numerals denote the same elements. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to a physical and / or electrical connection.

As used herein, "about", "approximately" or "substantially" includes the stated value and the average value within an acceptable deviation range of a particular value determined by one of ordinary skill in the art, taking into account the measurements and A specific number of measurement-related errors (ie, limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ± 30%, ± 20%, ± 10%, ± 5%. Furthermore, "about", "approximately" or "substantially" as used herein may select a more acceptable range of deviations or standard deviations based on optical properties, etching properties, or other properties, and all properties can be applied without one standard deviation .

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that, such as those defined in commonly used dictionaries Terms should be construed to have meanings consistent with their meanings in the context of the related art and the present invention, and will not be construed as idealized or overly formal meanings unless explicitly defined as such herein.

In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element to another element, as shown. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientation shown in the figures. For example, if the device in one of the figures is turned over, elements described as being on the "lower" side of other elements would then be oriented on "upper" sides of the other elements. Thus, the exemplary term "under" may include orientations of "under" and "upper" depending on the particular orientation of the drawings. Similarly, if the device in one of the figures is turned over, elements described as "below" or "beneath" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "below" or "below" may include orientations above and below.

FIG. 1 is a schematic top view of a mosaic display device according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a mosaic display device according to an embodiment of the present invention. Among them, Fig. 2 corresponds to the section line I-I 'of Fig. 1. Referring to FIGS. 1 and 2, the mosaic display device 1000 includes at least two display panels. For example, in this embodiment, the spliced display device 1000 includes a first display panel 100 and a second display panel 200 that can be spliced to each other, and there is a splicing seam S between the first display panel 100 and the second display panel 200. . In this embodiment, the second display panel 200 is located on one side 200 a of the first display panel 100. However, the present invention is not limited to this. In other embodiments, the mosaic display device 1000 may also include three or more display panels, the second display panel 200 and / or 200b, 200c, 200d of the first display panel 100. , 100b, 100c, and 100d At least one side may have other splicing seams between adjacent display panels (not shown).

In this embodiment, the first display panel 100 and the second display panel 200 include an upper substrate (or a first substrate) 10, a lower substrate (or a second substrate) 20, and an upper substrate 10 and a lower substrate, respectively. Display medium 30 between 20. For example, the materials of the upper substrate 10 and the lower substrate 20 may be glass, quartz, ceramic, metal, alloy, or polyimide (PI), polyethylene terephthalate (PET), Organic materials such as polyethylene naphthalate (PEN), polyamide (PA), or other suitable materials or a combination of at least two of the above materials. The first display panel 100 and the second display panel 200 may be any kind of display panel. For example, the display medium 30 may be a non-self-luminous material, such as liquid crystal (Liquid crystal) or other suitable materials, and the first display panel 100 and the second display panel 200 may be liquid crystal display panels, but the present invention is not limited to this. Therefore, in other embodiments, the first display panel 100 and the second display panel 200 may also be self-luminous display panels (eg, organic light-emitting elements, inorganic light-emitting elements, or other suitable elements) or other suitable types of display panels.

Referring to FIG. 2, the first display panel 100 includes a first display area A1 having a plurality of first sub-pixels 110, a first area B1 having a plurality of second sub-pixels 120, and an edge f1. The second sub-pixel 120 of the first region B1 of the first display panel 100 is located between the edge f1 and the first sub-pixel 110 of the first display region A1 of the first display panel 100. For example, in the first display panel 100, the second sub-pixel 120 is larger than the first sub-pixel 120 The element 110 is adjacent to the border area 1000a or the stitching seam S of the stitching display device 1000. Similarly, the second display panel 200 includes a second display area A2 having a plurality of third sub-pixels 210, a second area B2 having a plurality of fourth sub-pixels 220, and an edge f2. The fourth sub-pixel 220 of the second area B2 of the second display panel 200 is located between the edge f2 and the third sub-pixel 210 of the second display area A2 of the second display panel 200. For example, in the second display panel 200, the fourth sub-pixel 220 is closer to the boundary area 1000a or the stitching seam S of the mosaic display device 1000 than the third sub-pixel 210. In one embodiment, the plurality of first sub-pixels 110 may display sub-pixels of different colors, for example, a red sub-pixel, a green sub-pixel, and a blue sub-pixel, but are not limited thereto. The plurality of second sub-pixels 120 may display sub-pixels of different colors, for example, a red sub-pixel, a green sub-pixel, and a blue sub-pixel, but are not limited thereto. The plurality of third sub-pixels 210 may display child pixels of different colors, for example, a red sub-pixel, a green sub-pixel, and a blue sub-pixel, but are not limited thereto. The plurality of fourth sub-pixels 220 may display sub-pixels of different colors, for example, a red sub-pixel, a green sub-pixel, and a blue sub-pixel, but are not limited thereto. In this embodiment, the first display area A1 and the first area B1 of the first display panel 100 are preferably composed of a red sub-pixel, a green sub-pixel, and a blue sub-pixel, respectively, but are not limited thereto. Similarly, the second display area A2 and the second area B2 of the second display panel 200 are preferably composed of a red sub-pixel, a green sub-pixel, and a blue sub-pixel, respectively, but are not limited thereto. Generally speaking, regardless of the type of display panel (for example, a non-self-emissive display panel or a self-emissive display panel), the aforementioned sub-pixels (for example, the first sub-pixel 110, the second sub-pixel 120, and the third sub-pixel 210 and fourth sub-pixel 220) at least one of which basically includes at least one switching element (not shown) (Shown), which has a gate (not shown) connected to at least one scan line (not shown), a source (not shown) connected to at least one data line (not shown), and a drain connected to a control display Electrodes (not shown) of the medium (for example, self-emitting materials or non-self-emitting materials, not shown), and the switching element (not shown) may be a bottom-gate transistor, a top-gate transistor or other suitable Transistor. The mosaic display device 1000 includes an optical unit 300. The optical unit 300 is disposed on the first display panel 100, the stitching seam S, and the second display panel 200. In this embodiment, the optical unit 300 extends along the extending direction of the stitching seam S (for example, the y direction in FIG. 1), and the optical unit 300 covers the boundary area 1000 a. The optical unit 300 includes a transparent substrate 310. The transparent substrate 310 is disposed on the first display panel 100, the stitching seam S, and the second display panel 200. For example, the transparent substrate 310 and the plurality of second sub-pixels 120 in the first region B1 of the first display panel 100. At least a part of the second display panel 200 and at least a part of the plurality of fourth sub-pixels 220 in the second region B2 of the second display panel 200 overlap in a predetermined direction (for example, the z direction in FIG. 2). In this embodiment, the material of the transparent substrate 310 is, for example, glass or acrylic, but the present invention is not limited thereto. In other embodiments, the transparent substrate 310 may also use other suitable materials.

The transparent substrate 310 has a top surface 310a and a bottom surface 310b. The top surface 310a is farther away from the first display panel 100 and the second display panel 200 than the bottom surface 310b. The top surface 310a of the transparent substrate 310 has at least two inclined surfaces 310a-1, 310a-2 and a plane 310a-3 located between the at least two inclined surfaces 310a-1, 310a-2. For example, in this embodiment, the inclined surface 310a-1 of the transparent substrate 310 is located above at least a portion of the second sub-pixel 120 of the first display panel 100, and the inclined surface 310a-2 of the transparent substrate 310 is located on the second display. Above at least part of the fourth sub-pixel 220 of the panel 200, and the transparent substrate 310 The plane 310a-3 is located above the splicing seam S. The inclined surfaces 310 a-1 and 310 a-2 are respectively located on both sides of the joint S and are far from the joint S. In this embodiment, the inclined surface 310a-1 and the inclined surface 310a-2 may be inclined in opposite directions. For example, the inclined surface 310a-1 is inclined toward the right side of FIG. 2 and the inclined surface 310a-2 is inclined toward the left side of FIG. 2, but the present invention is not limited thereto.

In addition, in this embodiment, the transparent substrate 310 may optionally have side surfaces 310c-1, 310c-2. The side surface 310c-1 connects the bottom surface 310b and the inclined surface 310a-1. The side surface 310c-2 connects the bottom surface 310b and the inclined surface 310a-2. The following paragraphs and other illustrations will be used in the following paragraphs as examples to explain under what circumstances the transparent substrate 310 may or may not have the sides 310c-1, 310c-2.

The optical unit 300 includes transflective sheets 330A and 330B. The transflective sheets 330A and 330B are disposed on the first display panel 100 and the second display panel 200, respectively. For example, the transflective sheets 330A and 330B overlap the second sub-pixel 120 of the first display panel 100 and the fourth sub-pixel 220 of the second display panel 200, respectively. The semi-transmissive and semi-reflective sheets 330A and 330B may be respectively disposed on the inclined surfaces 310 a-1 and 310 a-2 of the transparent substrate 310 and are inclined relative to the first display panel 100 and the second display panel 200. In this embodiment, the semi-transmissive and semi-reflective sheets 330A and 330B are located on both sides of the splicing seam S and are far away from the splicing seam S, respectively. In this embodiment, the semi-transparent semi-reflective sheets 330A, 330B are inclined in opposite directions. For example, the semi-transparent semi-reflective sheet 330A is inclined toward the right direction of FIG. The direction pointing to the left of FIG. 2 is inclined, but the present invention is not limited thereto.

Semi-transparent and semi-reflective sheets 330A, 330B can reflect part of the light from sub-pixels Line L allows another part of the light L from the sub-pixel to pass through. The light L from the sub-pixel may be different according to different types of display panels. For example, the sub-pixel light from the non-self-luminous display panel comes from the backlight. Module (not shown), and the sub-pixel light of the self-luminous display panel comes from the light emitting layer (not shown). For example, in this embodiment, the transflective sheets 330A and 330B can reflect about 50% of the light L2 and can pass about 50% of the light L1. In other words, in this embodiment, the semi-transparent half Reflective sheet 330A. 330B can selectively have a reflectance of about 50% and a transmittance of about 50%, but the invention is not limited thereto. It should be noted that although the semi-transmissive semi-reflective sheets 330A and 330B are named as “semi-transparent” semi-reflective sheets, the present invention does not limit the reflectivity and transmittance of the semi-transparent semi-reflective sheets 330A and 330B to be constant If it is about 50%. In other embodiments, the reflectance and transmittance of the semi-transparent and semi-reflective sheets 330A and 330B may be designed to other appropriate values according to actual requirements.

The optical unit 300 includes a reflection sheet 320. The reflective sheet 320 is disposed on the splicing seam S between the first display panel 100 and the second display panel 200, and overlaps at least a part of the plane 310a-3 of the transparent substrate 310. The reflection sheet 320 has a scattering surface 320a. In this embodiment, the scattering surface 320a of the reflection sheet 320 may be, for example, a scattering layer formed on the substrate of the reflection sheet 320. The scattering layer is, for example, but not limited to, a white paint layer. Not limited to barium sulfate. However, the present invention is not limited to this. In other embodiments, the scattering surface 320a of the reflection sheet 320 may also be formed by other suitable methods. For example, an uneven microstructure may be formed on the surface of the substrate of the reflection sheet 320 to make It is a scattering surface 320a.

The scattering surface 320a of the reflection sheet 320 can diffuse / reflect light L2 in all directions Shoot. In this embodiment, the scattering surface 320a of the reflection sheet 320 can shield the area between the splicing seam S and the second sub-pixel 120 and the fourth sub-pixel 220, but not the first sub-pixel 110, the second The sub-pixel 120, the third sub-pixel 210, and the fourth sub-pixel 220. Preferably, the reflection sheet 320 can completely shield the border area 1000a (ie, edge f1, edge f2) of the mosaic display device 1000, and not the area with the actual sub-pixels (that is, the first display area A1, the first area B1, and the like). The second display area A2, the second area B2), but the present invention is not limited to this. In other embodiments, a part of the mosaic display device 1000 can be selectively masked by not affecting the quality of the mosaic display screen as a requirement. The boundary area 1000a (that is, part of the edge f1 and / or part of the edge f2), without obscuring the area with the actual sub-pixels (that is, the first display area A1, the first area B1, the second display area A2, the first The second area B2) or the border area 1000a (ie, the edge f1, the edge f2), a part of the first area B1, and / or a part of the second area B2, without shielding the first display area A1 and the second Display area A2.

Through the arrangement of the optical unit 300, the mosaic display device 1000 can optimize the display effect of the boundary area 1000a. For example, a sub-pixel (eg, a second sub-pixel 120 and / or a fourth sub-pixel 220) of the display panel (for example, the first display panel 100 and / or the second display panel 200) near the boundary area 1000a. The light L emitted through the transparent substrate 310 passes through the bottom surface 310b of the transparent substrate 310 and is transmitted to the transflective sheet (e.g., transflective sheet) on the inclined surface (e.g., inclined surface 310a-1 and / or inclined surface 310a-2). 330A and / or transflective sheet 330B), part of the light L1 will pass through the transflective sheet (eg, transflective sheet 330A and / or transflective sheet 330B) and The display function above the pixels (for example: the second sub-pixel 120 and / or the fourth sub-pixel 220) Yes, the other part of the light L2 will be reflected by the transflective sheet (eg, the transflective sheet 330A and / or the transflective sheet 330B) to the reflective sheet 320 on the splicing seam S, The scattering surface 320a of the reflection sheet 320 can reflect a part of the light L2 from the sub-pixel (for example, the second sub-pixel 120 and / or the fourth sub-pixel 220) to the boundary area 1000a, so as to make the mosaic display device 1000 The border area 1000a has a display effect.

In this embodiment, taking a non-self-emitting display panel as an example, the spliced display device 1000 may optionally include polarizing plates P1 and P2. The polarizing plates P1 and P2 may be respectively disposed on the upper substrate 10 and the lower substrate 20 corresponding to the first display panel 100 and the second display panel 200. For example, the polarizing plate P1 is located between the bottom surface 310b of the transparent substrate 310 of the optical unit 300 and the outer surface 10 'of the upper substrate 10, and the polarizing plate P2 is disposed on the outer surface 20' of the lower substrate 20. The polarizing plates P1 and P2 overlap at least a part of the first display panel 100 and at least a part of the second display panel 200, respectively. For example, in this embodiment, the polarizing plate P1 may overlap the first sub-pixel 110 and the second sub-pixel 120 of the first display panel 100, and the polarizing plate P2 may be the third sub-pixel of the second display panel 200 The pixels 210 and the fourth sub-pixel 220 are overlapped, and the polarizing plates P1 and P2 may selectively not cover the splicing seam S, but the present invention is not limited thereto. In this embodiment, at least one of the polarizing plates P1 and P2 may be a wire grid polarizer (WGP) or other polarizers, and the wire grid polarizer or other polarizers may be If necessary, the first display panel 100 and / or the second display panel 300 are disposed at appropriate positions, instead of being disposed only at the aforementioned positions. In some embodiments, if the first display panel 100 and the second display panel 200 can be self-luminous display panels, It is necessary to selectively set or not set the polarizing plate in the light emitting direction. For example, if a polarizing plate is required and the light emission direction is upward (for example: positive z direction (+ z direction)), only the polarizing plate P1 is disposed on the bottom surface 310b of the transparent substrate 310 of the optical unit 300 and the upper substrate 10 Between the outer surfaces 10 ′; if a polarizing plate is required, and the light emitting direction is to emit light downward (for example: negative z direction (-z direction)), only the polarizing plate P2 is disposed on the outer surface 20 ′ of the lower substrate 20 If a polarizing plate is required and the light emission direction is upward and downward (for example, positive z and negative z directions), the polarizing plate P1 is located between the bottom surface 310b of the transparent substrate 310 of the optical unit 300 and the outer surface 10 'of the upper substrate 10. Meanwhile, the polarizing plate P2 is disposed on the outer surface 20 'of the lower substrate 20, and the remaining description can be referred to the foregoing.

FIG. 4 is a schematic cross-sectional view of a mosaic display device of a comparative example. Please refer to FIG. 4. The same components of the mosaic display device of the comparative example as in FIG. 2 are denoted by the same or similar reference numerals; the difference between the two is that the mosaic display device of FIG. 4 uses the optical unit 300 of the mosaic display device 1000 of FIG. 2. Replaced with a lens (or lens layer P), the concave depression of the lens layer P (as shown in FIG. 4) is aligned with the stitching seam S, and the lens layer P will also be set at a commonly used sub-pixel (see FIG. 2). For example, the sub-pixels at A1 and A2), wherein the lens layer P does not have any semi-transmissive and semi-reflective sheet, and the reflective sheet is not disposed on the splicing seam S and the boundary area 1000b. Generally speaking, the lens layer P is formed by splicing two lenses respectively on the first display panel 100 and the second display panel 200. The lens layer P is used to refract the light L emitted from the display area A on both sides of the boundary area 1000b above the splicing seam S, so that the splicing seam S and the boundary area 1000b of the splicing display device have a display effect. Limited by the type of the lens structure of the lens layer P, the light L emitted from above the stitching seam S and the frame area 1000b is concentrated along a specific direction (Eg, direction z that is almost parallel to the frontal direction), so when a user views the mosaic display device of the comparative example at a large viewing angle, the display screen near the stitching seam S cannot be viewed by the user with a large viewing angle, resulting in a boundary area 1000b display is not good.

Referring to FIG. 2, the mosaic display device 1000 uses a combination of a transflective sheet (eg, a transflective sheet 330A and / or a transflective sheet 330B) and a reflective sheet 320 from the vicinity of the boundary area 1000a. Part of the light L2 of the child pixels (for example, the second child pixel 120 and the fourth child pixel 220) can be reflected multiple times before being emitted inside the optical unit 300; thus, the optical unit 300 does not need to have an excessively large thickness t, that is, It can provide a sufficient light path length for the light L2 to pass from the sub-pixels (eg, the second sub-pixel 120 and the fourth sub-pixel 220) near the boundary area 1000a to the top of the boundary area 1000a and exit. In addition to the comparative example of the optical unit 300 in FIG. 2 (for example, as shown in FIG. 4, in order to design the light L to be refracted above the splicing seam S, it is usually necessary to increase the thickness of the lens layer P to provide a sufficient light path length). In addition to the function of the lens layer P, the overall thickness T of the thin display device 1000 can be reduced.

In the embodiment and the comparative example of FIG. 2, the display panels are all taken as examples of non-emissive display panels, and the display panels may have polarizing plates P1 and P2. If the display panel is a self-luminous display panel, the required polarizing plate P1 and / or polarizing plate P2 may be selected according to the foregoing description. For example, in the embodiment of FIG. 2, the thickness t1 of the display panel and the polarizing plates P1 and P2 is added (eg, the first display panel 100 and the polarizing plates P1 and P2 are added together or the second display panel 200 and the polarizing plate are added together). P1, P2); the optical unit 300 has a thickness t; the overall thickness T of the stitching display device 1000 is approximately equal to the thickness t1 (for example, the thickness of the first display panel 100 and the thickness of the polarizing plates P1 and P2 are summed or the second display The sum of the thickness of the display panel 200 and the thickness of the polarizing plates P1 and P2) and the thickness t (for example, the optical unit 300), the overall thickness T, for example, is about 1500 μm. The overall thickness of the spliced display device of the comparative example (see FIG. 4) is equal to the thickness of the lens layer P and the thickness of the display panel and the polarizing plates P1 and P2, t1 (for example, the thickness of the first display panel 100 and the thickness of the polarizing plates P1 and P2 are added together Or the thickness of the second display panel 200 and the thickness of the polarizing plates P1 and P2); in general, under the condition that the angle between the light L and the direction z is greater than or equal to 0 ° and less than or equal to 10 °, Let the light rays L from the spectroscopic pixels (that is, the second sub-pixel 120 and / or the fourth sub-pixel 220) exit from the lens layer P (for example, from the depression of the curvature of the lens layer P) above the middle of the boundary area 1000b The thickness of the upper substrate 10, the polarizing plate P1, and the lens layer is about 3335 μm. In other words, compared to the thickness of the mosaic display device of the comparative example (see FIG. 4), the overall thickness T of the mosaic display device 1000 of this embodiment (for example, FIG. 2) can be reduced by about 50% or more.

In this embodiment, the reflection sheet 320 of the optical unit 300 of the mosaic display device 1000 uses the scattering surface 320a to "scatter" and reflect from the sub-pixels near the boundary area 1000a (that is, the second sub-pixel 120 and the fourth sub-picture). Prime 220), therefore, the light L2 emitted from above the boundary area 1000a will be transmitted in all directions. Thereby, the problem of deterioration of the display effect in the boundary region of the mosaic display device of the comparative example viewed from a large viewing angle can be improved. Therefore, the stitching display device 1000 of FIG. 2 is compared with the stitching display device of the comparative example of FIG. 4. In addition to the stitching display device 1000 of FIG. 2, the stitching display device 1000 of FIG. The design light L is concentrated and refracted in the concave portion of the lens layer P having a curvature, and usually the thickness of the lens layer P needs to be increased.) In addition to being thinner, the boundary area 1000a of the mosaic display device 1000 in FIG. 2 The display effect viewed at a large viewing angle can also be better than that of the border area 1000b of the mosaic display device of the comparative example of FIG. 4.

In this embodiment, the brightness per unit area of each second sub-pixel 120 may be selectively greater than the brightness per unit area of each first sub-pixel 110, and the unit area of each fourth sub-pixel 220 The brightness of can be selectively larger than the brightness of the unit area of each third sub-pixel 210. The brightness comparison unit per unit area must be consistent, such as lumens (lm) or brightness (cd / m ² ). With this, even if a part of the light L2 emitted by the sub-pixel (for example, the second sub-pixel 120 and / or the fourth sub-pixel 220) is scattered on the boundary area 1000a, the sub-pixel (for example: the second sub-pixel) (Pixel 120 and / or fourth sub-pixel 220) and the unit area brightness formed by part of the light L1 emitted above it will be close to that of the sub-pixel (eg, the first sub-pixel 110 and / or the third sub-pixel 210) The unit area brightness formed by the emitted light (not shown). Therefore, increasing the unit area brightness of the second sub-pixel 120 (and the fourth sub-pixel 220) can make the brightness of the mosaic display device 1000 close, which is helpful to the display effect of the mosaic display device 1000.

Please refer to FIG. 2. In this embodiment, the extension direction (for example, extension direction d1 and / or extension direction d2) and the bottom surface of the inclined surface (for example, inclined surface 310a-1 and / or inclined surface 310a-2) of the transparent substrate 310. An acute angle (for example, an acute angle θ1 and / or an acute angle θ2) is sandwiched between the extension direction (for example, extension direction -x and / or extension direction x) of 310b. The acute angle (for example, the acute angle θ1 and / or the acute angle θ2) may be designed in an appropriate range to optimize the overall performance of the mosaic display device 1000. The following uses FIG. 3 as an example.

FIG. 3 is an enlarged schematic view of a part of the mosaic display device 1000 of FIG. 2. Please refer to FIG. 2 and FIG. 3, the light L is emitted from the second sub-pixel 120 of the first display panel 100 and is transmitted in a direction z substantially parallel to the front view direction. Sheet 330A, transflective sheet 330A partially reflects light L2 at a reflection angle θ, the upper substrate 10 of the first display panel 100 has a thickness tg in the direction z, and the upper polarizing plate P1 has a thickness tp in the direction z. The transparent base The side 310c-1 of the material 310 has a height H1 in the direction z, a boundary area 1000a of the mosaic display device 1000 has a width Wb in the direction x, and one pixel composed of a plurality of second sub-pixels 120 has the direction x Width Wp. From the tangent function, the following relationship can be obtained . In order to reduce the overall thickness T of the mosaic display device 1000, H1 = 0 may be selectively set (that is, the transparent substrate 300 does not have the side 310c-1). In the case of H1 = 0, according to the thickness tg of the general upper substrate 10, the thickness tp of the upper polarizing plate P1, the width Wp of the pixels, the width Wb of the boundary region 1000a, and the above-mentioned relationship (1), the reflection angle θ is relatively Preferably, it is greater than 0 degrees and less than or equal to 36 degrees, so that part of the light L2 from the second sub-pixel 120 can form a uniform light distribution above the boundary area 1000a. It can be seen from the geometric relationship shown in FIG. 3 that the reflection angle θ is approximately equal to the acute angle θ1 between the extending direction d1 of the inclined surface 310a-1 of the transparent substrate 310 and the extending direction -x of the bottom surface 310b. In other words, when H1 = 0 (that is, the overall thickness T of the mosaic display device 1000 is optimized), the acute angle θ1 between the extending direction d1 of the inclined surface 310c-1 of the transparent substrate 310 and the extending direction -x of the bottom surface 310b is smaller than It is preferably designed to be within a range of greater than 0 degrees and less than or equal to 36 degrees. This is further described below with reference to FIGS. 5 to 8.

Preliminary design with Matlab mathematical software Figure 5, Figure 6, Figure 7, Figure 8 Experiment with Figure 9A to Figure 9D with TracePro optical mechanism simulation analysis software, where Figure 5, Figure 6, Figure 7 and Figure 8, the abscissa represents the position of the boundary area 1000a, for example: the width Wb of the boundary area 1000a About 1000 microns (um). The ordinate indicates the relative energy intensity (unitless). FIG. 5 shows the energy ratio of the light L on the boundary area 1000a of the mosaic display device 1000 at an acute angle θ = 35.5 °. FIG. 6 shows the energy ratio of the light L on the boundary area 1000a of the mosaic display device 1000 at an acute angle θ = 36 °. FIG. 7 shows the energy ratio of the light L on the boundary area 1000a of the mosaic display device 1000 at an acute angle θ = 36.5 °. FIG. 8 shows the energy ratio of the light L on the boundary area 1000a of the mosaic display device 1000 at an acute angle θ = 37 °.

The design of the mosaic display device 1000 is preferably that the brightness is slightly higher at the middle position of the boundary region 1000a (for example, the position on the boundary region corresponding to FIG. 5 to FIG. 8 is about 500 μm), and both sides of the boundary region 1000a (for example: The brightness on the boundary area 1000a corresponding to FIG. 5 to FIG. 8 is about 0 μm and 1000 μm), so that the brightness on both sides of the boundary area 1000a will not affect the display brightness of the display areas A1 and A2. It can be seen from FIGS. 5 to 8 that when the acute angle θ increases from about 35.5 ° to about 37 °, the curve shown in FIG. 8 slightly rises on the left and right sides (as circled by the dotted line in FIG. 8), which represents The increase in brightness on both sides of the boundary area 1000a will affect the display brightness of the display areas A1 and A2; and, as can be seen from FIGS. 5 to 8, when the acute angle θ increases from about 35.5 ° to about 37 °, the boundary area 1000a The overall energy of the light on it is also reduced, which is not conducive to the display effect of the boundary area 1000a. Based on the data in Figures 5 to 8, as shown in Figures 5 and 8, when the acute angle θ is about 35.5 ° and 36 °, will the curve rise at the left and right sides, and the peak value of the curve can be maintained at about About 1.2 (that is, the overall energy of the light on the boundary area 1000a is high). It can be proved that the acute angle θ 1 is preferably designed in a range greater than 0 degrees and less than or equal to 36 degrees to facilitate the display effect of the boundary area 1000 a.

9A to 9D simulate the brightness of light L on the boundary area 1000a and its sub-pixels (eg, A1, A2, B1, and B2) at viewing angles of 0 °, 15 °, 30 °, and 45 °, respectively, where The acute angle θ is in a range greater than 0 degrees and less than or equal to 36 degrees. For example, the acute angle θ is about 34 ° and 35.5 °. FIG. 10 is a light field pattern used to simulate the mosaic display device of FIGS. 9A to 9D, wherein the abscissa simulates the light angle of the backlight entering the display panel 100/200, and the ordinate represents the normalized relative intensity of the energy (unitless). The data of FIGS. 9A to 9D can prove that if the acute angle θ is 34 ° and 35.5 °, the light L on the boundary area 1000a has sufficient brightness at an angle of view of 0 ° to 45 °. In other words, when the user views the mosaic display device 1000 from various perspectives, the border area 1000a of the mosaic display device 1000 has sufficient brightness and a good display effect.

However, the present invention does not limit the acute angle θ1 to be designed in a range greater than 0 degrees and less than or equal to 36 degrees. In the case where it is difficult to form an acute angle θ1 with a small angle and / or the width Wb of the boundary region 1000 a is large, the acute angle θ1 may also be selectively greater than 36 degrees. For example, in the case where the width Wb of the boundary area 1000a is greater than 3 times the pixel width Wp, if H1 = 0, according to the thickness tg of the general upper substrate 10, the thickness tp of the upper polarizing plate P1, and the above relationship In formula (1), the reflection angle θ will be greater than 36 degrees; at this time, the light distribution on the boundary area 1000a of the mosaic display panel 1000 is liable to be uneven. Therefore, when the width Wb of the boundary region 1000a is large (for example, Wb is greater than 3 times Wb), it is preferable to selectively make H1 greater than 0 so that the light distribution on the boundary region 1000a can be more uniform. . It is worth noting that while increasing H1, the second The sub-pixel 120 is susceptible to light leakage. Therefore, a brightness attenuation sheet 152 (for example, shown in FIG. 2) can be selectively disposed on the side 310 c-1 of the transparent substrate 310 to reduce the light leakage of the second sub-pixel 120. The effect of the display effect of the first sub-pixel 110. The brightness attenuating sheet 152 refers to a neutral density filter having approximately the same transmittance for various light wavelengths. The transmittance of the brightness attenuation sheet 152 may be determined according to actual requirements. In this embodiment, the transmittance of the brightness attenuating sheet 152 is not greater than the transmittance of the semi-transmissive and semi-reflective sheet 330A. For example, if the unit area brightness of the second sub-pixel 120 near the stitching seam S is N times the unit area brightness of the first sub-pixel 110, the transmittance of the brightness attenuation sheet 152 can be designed as (1 / N), but the present invention is not limited to this, nor is it limited to integers.

Similarly, the extending direction d2 of the inclined surface 310a-2 of the transparent substrate 310 and the extending direction x of the bottom surface 310b have an acute angle θ2. The acute angle θ2 can also be designed in an appropriate range as described above. For example, when H1 = 0 (for example, the overall thickness T of the mosaic display device 1000 is optimized, and the transparent substrate 310 does not have the sides 310c-1, 310c-2), the acute angle θ2 is preferably designed to be greater than 0. Within a range of less than or equal to 36 degrees; at an acute angle θ2 that is not easy to form a small angle and / or the width Wb of the border area 1000a is large (for example: the width Wb of the border area 1000a is greater than 3 times the pixel width Wp) In the case of a sharp angle, the acute angle θ2 may also be selectively greater than 36 degrees. In addition, similarly, when H1 is increased, the fourth sub-pixel 220 is prone to light leakage. Therefore, a brightness attenuation sheet 154 can also be selectively disposed on the side surface 310c-2 of the transparent substrate 310 (for example, as shown in FIG. 2). ). The optical characteristics and functions of the brightness attenuating sheet 154 are similar to the optical characteristics and functions of the brightness attenuating sheet 152, and will not be repeated here.

FIG. 11 is a schematic cross-sectional view of a mosaic display device according to another embodiment of the present invention. The stitching display device 1000A in FIG. 11 is similar to the stitching display device 1000 in FIG. 2, so the same or corresponding components are represented by the same or corresponding reference numerals. The differences between the two are described below, and the same or corresponding parts, please refer to The foregoing description will not be repeated here.

The difference between the mosaic display device 1000A and the mosaic display device 1000 is that the mosaic display device 1000A further includes transparent substrates 162 and 164. The transparent substrates 162 and 164 are respectively disposed on the first display panel 100 and the second display panel 200. The transparent substrates 162 and 164 partially overlap the optical unit 300. The transparent substrate 162 includes at least a bottom surface 162b, a top surface 162a, and an inclined surface 162c. The inclined surface 162c of the transparent substrate 162 corresponds to the inclined surface 310a-1 of the transparent substrate 310. The top surface 162 a of the transparent substrate 162 overlaps the first sub-pixel 110. In some embodiments, the top surface 162a of the transparent substrate 162 may also overlap at least a portion of the second sub-pixel 120, but is not limited thereto. In addition, if the transparent substrate 310 has a side surface 310c-1, the transparent substrate 162 may include a side surface 162d connecting the inclined surface 162c and the bottom surface 162b. The side surface 162d of the transparent substrate 162 corresponds to the side surface 310c-1 of the transparent substrate 310. Similarly, the transparent substrate 164 includes at least a bottom surface 164b, a top surface 164a, and an inclined surface 164c. The inclined surface 164c of the transparent substrate 164 corresponds to the inclined surface 310a-2 of the transparent substrate 310. The top surface 164 a of the transparent substrate 164 overlaps the third sub-pixel 210. In some embodiments, the top surface 164a of the transparent substrate 164 may also overlap at least part of the fourth sub-pixel 220, but it is not limited thereto. In addition, if the transparent substrate 310 has a side surface 310c-2, the transparent substrate 164 may include a side surface 164d connecting the inclined surface 164c and the bottom surface 164b. The side 164d of the transparent substrate 164 corresponds to the transparent substrate 310 The side 310c-2.

In this embodiment, the haze of the top surfaces 162a and 164a of the transparent substrates 162 and 164 may be greater than the haze of the plane 310a-3 of the transparent substrate 310. Thereby, the display effect of the border area 1000a can be close to that of other areas of the mosaic display device 1000A. In detail, the divergence of the light L2 scattered by the reflection sheet 320 is greater than the light L directly emitted by the first sub-pixel 110, the second sub-pixel 120, the third sub-pixel 210, and / or the fourth sub-pixel 220. The degree of divergence is large, but the light L2 scattered by the scattering surface 320a and having a large degree of divergence is transmitted to the user's eyes through the plane 310a-3 of the transparent substrate 310 with small haze, and is not scattered by the scattering surface 320a. The light L is transmitted to the user's eyes through the top surfaces 162a, 164 of the transparent substrates 162, 164 with high haze. Thereby, the degree of divergence of the light L2 emitted from the boundary area 1000a will be close to the degree of divergence of the light L emitted from other areas, so that the display effect of the boundary area 1000a is close to that of the other areas of the mosaic display device 1000A.

There are many methods for making the top surfaces 162a and 164a of the transparent substrates 162 and 164 have a high haze. For example, in this embodiment, uneven microstructures can be formed on the top surfaces 162a, 164a of the transparent substrates 162, 164, so as to cause the effect of scattering light and increase the haze. However, the present invention is not limited to this. In other embodiments, the top surfaces 162a and 164a may have a high haze by other methods. For example, a transparent scattering material layer is formed on the top surfaces 162a and 164a of the transparent substrates 162 and 164. (For example: barium sulfate) and so on. In some embodiments, the top surfaces 310a-3 of the transparent substrate 310 can be selectively flush with the top surfaces 162a and 164a of the transparent substrates 162 and 164 to form The coplanar connection surface is about the transparent substrate 310, but the transparent substrate 310 may be a connection piece connecting the transparent substrates 162 and 164 as a whole, but it is not limited thereto.

In summary, a mosaic display device according to an embodiment of the present invention includes a first display panel, a second display panel, and an optical unit. The first display panel is spliced with the second display panel. The optical unit is disposed on the first display panel, the second display panel, and a splicing seam of the first display panel and the second display panel. By using the combination of the semi-transparent and semi-reflective sheet of the optical unit and the reflective sheet, the mosaic display device can guide part of the light from the sub-pixels to the top of the boundary area to emit light, and make the overall thickness of the mosaic display device thin. In addition, the reflection sheet of the optical unit uses the scattering surface to "scatter" and reflect part of the light from the sub-pixels, and the light emitted from above the boundary area will be transmitted in all directions. Thereby, the problem of deterioration of the display effect when viewing the boundary region of the conventional mosaic display device under a large viewing angle can be improved.

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

Claims (15)

A spliced display device includes: a first display panel including a first display area having a plurality of first sub-pixels and at least a first area having a plurality of second sub-pixels; a second display panel, A second display area including a plurality of third sub-pixels and at least a second area including a plurality of fourth sub-pixels, wherein at least one of the second display panel adjacent to the first display panel There is a splicing seam between the side and the first display panel, and the second sub-pixels of the first area are located between the splicing seam and the first sub-pixels of the first display area, The fourth sub-pixels of the second area are located between the stitching seam and the third sub-pixels of the second display area; and an optical unit is disposed on the first display panel, the stitching And the second display panel, wherein the optical unit includes: a transparent substrate disposed on the first display panel, the splicing seam and the second display panel, wherein the transparent substrate and the first display panel At least a part of the second sub-pixels of the region and the fourth sub-pixels of the second region At least a part of which overlaps, and the transparent substrate has a top surface and a bottom surface, the top surface has at least two inclined surfaces and a plane located between the inclined surfaces; a reflective sheet is disposed on the splicing seam, wherein, the The reflecting sheet has a scattering surface, and the plane of the top surface of the transparent substrate overlaps at least a part of the reflecting sheet; and two semi-transmissive transflective sheets are respectively disposed on the first display panel and the second display. On the panel, and the semi-transmissive and semi-reflective sheets respectively overlap with at least a part of the second sub-pixels of the first region and at least a part of the fourth sub-pixels of the second region, wherein, the The semi-transparent and semi-reflective sheets are respectively disposed on the inclined surfaces of the transparent substrate. The mosaic display device according to item 1 of the scope of patent application, wherein the brightness of the unit area of each of the second sub-pixels is greater than the brightness of the unit area of each of the first sub-pixels, and The brightness per unit area is greater than the brightness per unit area of each of the third sub-pixels. The splicing display device according to item 1 of the scope of patent application, wherein an extending angle between each extending direction of the inclined surface and an extending direction of the bottom surface is at an acute angle. The mosaic display device according to item 3 of the scope of patent application, wherein the acute angle is greater than 0 degrees and less than or equal to 36 degrees. The mosaic display device according to item 1 of the scope of patent application, wherein the oblique directions are inclined in opposite directions. The spliced display device described in item 1 of the patent application scope further includes: two transparent substrates respectively disposed on the first display panel and the second display panel, wherein each of the transparent substrates includes at least a bottom surface and a top surface. A plane and an inclined plane, and the inclined plane of each transparent substrate corresponds to each of the inclined planes of the transparent substrate. The spliced display device according to item 6 of the scope of patent application, wherein the haze of the top surface of each transparent substrate is greater than the haze of the plane of the transparent substrate. The spliced display device according to item 6 of the scope of patent application, wherein each of the transparent substrates partially overlaps the optical unit. The spliced display device according to item 1 of the patent application scope, wherein the transparent substrate further includes at least two sides, wherein one of the sides is connected to one of the bottom surface and one of the inclined surfaces, and the other of the sides is The bottom surface and the inclined surfaces are connected to each other, and the optical unit further includes: at least two brightness attenuating sheets respectively disposed on the side surfaces of the transparent substrate. The mosaic display device according to item 9 of the scope of the patent application, wherein the transmittance of the brightness attenuating sheets is not greater than the transmittance of the semi-transmissive and semi-reflective sheets. The spliced display device according to item 9 of the scope of patent application, further comprising: two transparent substrates respectively disposed on the first display panel and the second display panel, wherein each of the transparent substrates includes at least a bottom surface and a top surface. Surface, an inclined surface, and a side surface, the inclined surface of each transparent substrate corresponds to each of the inclined surfaces of the transparent substrate, and the side surface of each transparent substrate is opposite to each of the side surfaces of the transparent substrate. The splicing display device according to item 11 of the scope of patent application, wherein the haze of the plane of the transparent substrate is greater than the haze of the top surface of each transparent substrate. The spliced display device according to item 11 of the scope of patent application, wherein each of the transparent substrates partially overlaps the optical unit. The splicing display device according to item 1 of the scope of patent application, wherein the optical unit extends along an extending direction of the splicing seam. The splicing display device according to item 1 of the scope of patent application, further comprising: at least two polarizing plates disposed under the transparent substrate of the optical unit, wherein the polarizing plates are respectively connected to the first display panel and the first At least a part of the two display panels overlap.