TWI738465B - Display device - Google Patents

Display device Download PDF

Info

Publication number
TWI738465B
TWI738465B TW109127711A TW109127711A TWI738465B TW I738465 B TWI738465 B TW I738465B TW 109127711 A TW109127711 A TW 109127711A TW 109127711 A TW109127711 A TW 109127711A TW I738465 B TWI738465 B TW I738465B
Authority
TW
Taiwan
Prior art keywords
light
display device
microstructures
optical plate
film
Prior art date
Application number
TW109127711A
Other languages
Chinese (zh)
Other versions
TW202206908A (en
Inventor
陳明倫
林義文
陳政傳
林晉安
田堃正
Original Assignee
友達光電股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 友達光電股份有限公司 filed Critical 友達光電股份有限公司
Priority to TW109127711A priority Critical patent/TWI738465B/en
Priority to CN202011607047.6A priority patent/CN112526783B/en
Application granted granted Critical
Publication of TWI738465B publication Critical patent/TWI738465B/en
Publication of TW202206908A publication Critical patent/TW202206908A/en

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

A display device including a liquid crystal module and a backlight module is provided. The liquid crystal module includes a dual-domains liquid crystal layer, a lower polarizer and an upper polarizer. The lower polarizer has a transmission axis along a first direction. The backlight module includes a light emitting module, a first prism sheet, a second prism sheet, a reflective-polarizing film and a light expanding film. The reflective-polarizing film has a transmission axis along a third direction, wherein an angle between the third direction and the first direction falls within a range of 0±5 degrees. The light expanding film has a plurality of first microstructures extending along a first extension direction. A light emitted by the light emitting module is emitted through a light emitting surface of an optical plate, and then sequentially passes through the first prism sheet, the second prism sheet, the reflective-polarizing film, the light expanding film and the liquid crystal module to form an image light.

Description

顯示裝置Display device

本發明是有關於一種光學模組，且特別是有關於一種顯示裝置。The present invention relates to an optical module, and particularly relates to a display device.

由於電視、電腦、筆記型電腦、行動裝置、智慧型手機等電子產品的發展，顯示裝置的使用體驗的提升已經成為市場上的趨勢。現有的顯示裝置例如使用多域垂直配向式（Vertical Alignment, VA）液晶層來改善顯示裝置所呈現的顯示畫面在大視角時的色偏問題（color washout）。此外，為了改善顯示畫面在大視角時的伽瑪（Gamma）值不佳的問題，顯示裝置可使用多域共面切換式（In-Plane-Switching, IPS）液晶層，或顯示裝置可在多域垂直配向式液晶層上設置微結構膜。Due to the development of electronic products such as TVs, computers, laptops, mobile devices, and smart phones, the improvement of the experience of display devices has become a trend in the market. Existing display devices, for example, use a multi-domain vertical alignment (VA) liquid crystal layer to improve the color washout problem (color washout) of the display screen presented by the display device at a large viewing angle. In addition, in order to improve the problem of poor gamma (Gamma) value of the display screen at a large viewing angle, the display device can use a multi-domain coplanar switching (In-Plane-Switching, IPS) liquid crystal layer, or the display device can be used in multiple A microstructure film is arranged on the domain vertical alignment type liquid crystal layer.

然而，設置微結構膜的成本較高，使得顯示裝置的整體成本提高，且使得顯示裝置顯示畫面的對比度不佳。再者，液晶層的區域（domains）數越高雖能減少顯示畫面的色偏問題，但也造成顯示裝置的光能利用率較差而使得顯示畫面的輝度不佳。反之，液晶層的區域數較少的顯示裝置，例如雙域式液晶層，顯示裝置也因各膜層的搭配方式而存在顯示裝置的背光模組所提供的面光源的光形不對稱的問題，以及在最低灰階時也存在垂直視角及水平視角的大視角漏光的問題。However, the cost of providing the microstructure film is high, which increases the overall cost of the display device and makes the contrast of the display screen of the display device poor. Furthermore, although the higher the number of domains of the liquid crystal layer can reduce the color shift problem of the display screen, it also causes the poor utilization of light energy of the display device and the poor brightness of the display screen. Conversely, for display devices with a small number of areas of the liquid crystal layer, such as a dual-domain liquid crystal layer, the display device also has the problem of asymmetrical light shape of the surface light source provided by the backlight module of the display device due to the matching method of the various layers. , And at the lowest gray level, there is also the problem of light leakage at the large viewing angles of the vertical viewing angle and the horizontal viewing angle.

本發明提供一種顯示裝置，其能有效地減少面光源的光形不對稱的問題以及降低顯示裝置所呈現的顯示畫面在最低灰階時的大視角漏光的問題。The present invention provides a display device, which can effectively reduce the problem of asymmetry of the light shape of the surface light source and the problem of light leakage at a large viewing angle when the display picture presented by the display device is at the lowest gray level.

本發明的一實施例的顯示裝置包括一液晶模組以及一背光模組。液晶模組包括一雙域式液晶層、一下偏光片以及一上偏光片。雙域式液晶層的液晶分子在未施加電壓時沿一水平排列方向排列。下偏光片具有沿一第一方向的穿透軸，其中第一方向與水平排列方向之間的夾角落在45±5度的範圍內。上偏光片具有沿一第二方向的穿透軸。下偏光片、雙域式液晶層與上偏光片在一排列方向上依序排列。背光模組用以提供一面光源。背光模組包括一出光模組、一第一稜鏡片、一第二稜鏡片、一反射式偏極化膜片以及一擴光膜。出光模組包括一光學板以及一光源。光學板具有一出光面以及一入光面。光源設置在光學板的入光面的一側。反射式偏極化膜片具有沿一第三方向的穿透軸，其中第三方向與第一方向之間的夾角落在0±5度的範圍內。擴光膜具有多個沿一第一延伸方向延伸的第一微結構。出光模組、第一稜鏡片、第二稜鏡片、反射式偏極化膜片、擴光膜與液晶模組在排列方向上依序排列。由出光模組所發出的光經過光學板的出光面射出，再依序經過第一稜鏡片、第二稜鏡片、反射式偏極化膜片、擴光膜與液晶模組，以形成一影像光。The display device of an embodiment of the present invention includes a liquid crystal module and a backlight module. The liquid crystal module includes a dual domain liquid crystal layer, a lower polarizer and an upper polarizer. The liquid crystal molecules of the dual-domain liquid crystal layer are arranged along a horizontal arrangement direction when no voltage is applied. The lower polarizer has a penetration axis along a first direction, wherein the corner between the first direction and the horizontal arrangement direction is within a range of 45±5 degrees. The upper polarizer has a penetration axis along a second direction. The lower polarizer, the dual domain liquid crystal layer and the upper polarizer are arranged in sequence in an arrangement direction. The backlight module is used to provide a surface light source. The backlight module includes a light emitting module, a first light emitting film, a second light emitting film, a reflective polarization film and a light diffusing film. The light emitting module includes an optical plate and a light source. The optical plate has a light-emitting surface and a light-incident surface. The light source is arranged on one side of the light incident surface of the optical plate. The reflective polarization film has a penetration axis along a third direction, wherein the corner between the third direction and the first direction is within a range of 0±5 degrees. The light diffusing film has a plurality of first microstructures extending along a first extending direction. The light emitting module, the first light emitting film, the second light emitting film, the reflective polarizing film, the light diffusing film and the liquid crystal module are arranged in sequence in the arrangement direction. The light emitted by the light-emitting module is emitted through the light-emitting surface of the optical plate, and then sequentially passes through the first film, the second film, the reflective polarization film, the light diffusing film and the liquid crystal module to form an image Light.

基於上述，在本發明的一實施例的顯示裝置中，由於反射式偏極化膜片上設置了擴光膜，以及顯示裝置中各膜層的搭配，因此，顯示裝置的背光模組所提供的面光源的光形較佳，且顯示裝置的顯示效果較佳。Based on the above, in the display device of an embodiment of the present invention, because the reflective polarizing film is provided with a light-diffusing film and the combination of each film layer in the display device, the backlight module of the display device provides The light shape of the surface light source is better, and the display effect of the display device is better.

現將詳細地參考本發明的示範性實施例，示範性實施例的實例說明於附圖中。只要有可能，相同元件符號在圖式和描述中用來表示相同或相似部分。Reference will now be made in detail to the exemplary embodiments of the present invention, and examples of the exemplary embodiments are illustrated in the accompanying drawings. Whenever possible, the same component symbols are used in the drawings and descriptions to indicate the same or similar parts.

應當理解，當諸如層、膜、區域或基板的元件被稱為在另一元件“上”或“連接到”另一元件時，其可以直接在另一元件上或與另一元件連接，或者中間元件可以也存在。相反，當元件被稱為“直接在另一元件上”或“直接連接到”另一元件時，不存在中間元件。如本文所使用的，“連接”可以指物理及/或電性連接。再者，“電性連接”或“耦合”係可為二元件間存在其它元件。It should 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 can 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. As used herein, "connected" can refer to physical and/or electrical connection. Furthermore, "electrically connected" or "coupled" may mean that there are other elements between two elements.

本文使用的“約”、“近似”、或“實質上”包括所述值和在本領域普通技術人員確定的特定值的可接受的偏差範圍內的平均值，考慮到所討論的測量和與測量相關的誤差的特定數量（即，測量系統的限制）。例如，“約”可以表示在所述值的一個或多個標準偏差內，或±30％、±20％、±10％、±5％內。再者，本文使用的“約”、“近似”或“實質上”可依光學性質、蝕刻性質或其它性質，來選擇較可接受的偏差範圍或標準偏差，而可不用一個標準偏差適用全部性質。As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within the acceptable deviation range of the specific value determined by a person of ordinary skill in the art, taking into account the measurement in question and the The specific amount of measurement-related error (ie, the limitation 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 can be based on optical properties, etching properties or other properties to select a more acceptable range of deviation or standard deviation, and not one standard deviation can be applied to all properties .

除非另有定義，本文使用的所有術語（包括技術和科學術語）具有與本發明所屬領域的普通技術人員通常理解的相同的含義。將進一步理解的是，諸如在通常使用的字典中定義的那些術語應當被解釋為具有與它們在相關技術和本發明的上下文中的含義一致的含義，並且將不被解釋為理想化的或過度正式的意義，除非本文中明確地這樣定義。Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of related technologies and the present invention, and will not be interpreted as idealized or excessive The formal meaning, unless explicitly defined as such in this article.

圖1是依據本發明的一實施例的顯示裝置的立體***圖。請參考圖1，本發明的一實施例的顯示裝置10包括一液晶模組100以及一背光模組200。液晶模組100包括一雙域式（two domains）液晶層110、一下偏光片120以及一上偏光片130。下偏光片120、雙域式液晶層110與上偏光片130在一排列方向A上依序排列。背光模組200包括一出光模組210、一第一稜鏡片220、一第二稜鏡片230、一反射式偏極化膜片240以及一擴光膜250。出光模組210、第一稜鏡片220、第二稜鏡片230、反射式偏極化膜片240、擴光膜250與液晶模組100在排列方向A上依序排列。FIG. 1 is a three-dimensional exploded view of a display device according to an embodiment of the invention. Please refer to FIG. 1, a display device 10 according to an embodiment of the present invention includes a liquid crystal module 100 and a backlight module 200. The liquid crystal module 100 includes a two domains liquid crystal layer 110, a lower polarizer 120 and an upper polarizer 130. The lower polarizer 120, the dual-domain liquid crystal layer 110, and the upper polarizer 130 are sequentially arranged in an arrangement direction A. The backlight module 200 includes a light emitting module 210, a first light emitting film 220, a second light emitting film 230, a reflective polarization film 240, and a light diffusing film 250. The light emitting module 210, the first light emitting film 220, the second light emitting film 230, the reflective polarizing film 240, the light diffusing film 250, and the liquid crystal module 100 are arranged in sequence in the arrangement direction A.

詳細來說，本實施例的雙域式液晶層110的液晶分子在未施加電壓時沿一水平排列方向H排列。下偏光片120具有沿一第一方向D1的穿透軸，其中第一方向D1與水平排列方向H之間的夾角落在45±5度的範圍內。上偏光片130具有沿一第二方向D2的穿透軸，其中上偏光片130的第二方向D2與下偏光片120的第一方向D1之間的夾角落在90±5度的範圍內。在一實施例中，第二方向D2與第一方向D1較佳是互相垂直。In detail, the liquid crystal molecules of the dual domain liquid crystal layer 110 of this embodiment are arranged along a horizontal arrangement direction H when no voltage is applied. The lower polarizer 120 has a penetration axis along a first direction D1, wherein the corner between the first direction D1 and the horizontal arrangement direction H is within a range of 45±5 degrees. The upper polarizer 130 has a transmission axis along a second direction D2, wherein the corner between the second direction D2 of the upper polarizer 130 and the first direction D1 of the lower polarizer 120 is within a range of 90±5 degrees. In an embodiment, the second direction D2 and the first direction D1 are preferably perpendicular to each other.

在本實施例中，背光模組200用以提供一面光源。具體來說，背光模組200得出光模組210包括一光學板212以及一光源214。光學板212具有一出光面212S1以及一入光面212S2。光源214設置在光學板212的入光面212S2的一側。再者，光源214例如是發光二極體（Light-emitting diode, LED）光源、次毫米發光二極體（mini LED）光源或其他合適的光源。由出光模組210所發出的光經過光學板212的出光面212S1射出，再依序經過第一稜鏡片220、第二稜鏡片230、反射式偏極化膜片240、擴光膜250與液晶模組100，以形成一影像光。圖1示意了光學板212的出光面212S1相鄰於入光面212S2。也就是說，圖1的光學板212可為導光板，但本發明不以此為限。在一實施例中，光學板可為擴散板，且出光面相對於入光面。也就是說，光源設置於光學板的下方。在本發明的一實施例的顯示裝置10中，當光學板212為導光板時，顯示裝置10的整體體積較小；當光學板為擴散板時，由於光源設置於光學板的下方，背光模組的出光光形可藉由光源設置的位置來調整，因此背光模組的出光光形較為均勻。In this embodiment, the backlight module 200 is used to provide a surface light source. Specifically, the backlight module 200 indicates that the light module 210 includes an optical plate 212 and a light source 214. The optical plate 212 has a light-emitting surface 212S1 and a light-incident surface 212S2. The light source 214 is arranged on one side of the light incident surface 212S2 of the optical plate 212. Furthermore, the light source 214 is, for example, a light-emitting diode (LED) light source, a sub-millimeter light-emitting diode (mini LED) light source, or other suitable light sources. The light emitted by the light-emitting module 210 is emitted through the light-emitting surface 212S1 of the optical plate 212, and then sequentially passes through the first sheet 220, the second sheet 230, the reflective polarization film 240, the light diffusing film 250, and the liquid crystal The module 100 forms an image light. FIG. 1 illustrates that the light-emitting surface 212S1 of the optical plate 212 is adjacent to the light-incident surface 212S2. In other words, the optical plate 212 in FIG. 1 may be a light guide plate, but the present invention is not limited to this. In one embodiment, the optical plate may be a diffuser plate, and the light-emitting surface is opposite to the light-incident surface. In other words, the light source is arranged under the optical plate. In the display device 10 of an embodiment of the present invention, when the optical plate 212 is a light guide plate, the overall volume of the display device 10 is small; when the optical plate is a diffuser plate, since the light source is arranged under the optical plate, the backlight module The light shape of the group can be adjusted by the position of the light source, so the light shape of the backlight module is more uniform.

在一實施例中，背光模組200更包括設置於光學板212上的一量子點（quantum dots）層260，且光源214包括藍光光源。量子點層260設置於光學板212與第一稜鏡片220之間。在另一實施例中，量子點層260可直接設置於光學板212的出光面212S1上。在本發明的一實施例的顯示裝置10中，由於背光模組200包括了量子點層260，因此，背光模組200所提供的面光源的演色性較佳。In one embodiment, the backlight module 200 further includes a quantum dots layer 260 disposed on the optical plate 212, and the light source 214 includes a blue light source. The quantum dot layer 260 is disposed between the optical plate 212 and the first sheet 220. In another embodiment, the quantum dot layer 260 can be directly disposed on the light-emitting surface 212S1 of the optical plate 212. In the display device 10 of an embodiment of the present invention, since the backlight module 200 includes the quantum dot layer 260, the surface light source provided by the backlight module 200 has better color rendering properties.

在本實施例中，反射式偏極化膜片240具有沿一第三方向D3的穿透軸，其中第三方向D3與第一方向D1之間的夾角落在0±5度的範圍內。在一實施例中，第三方向D3與第一方向D1較佳是互相平行。In this embodiment, the reflective polarization film 240 has a penetration axis along a third direction D3, wherein the corner between the third direction D3 and the first direction D1 is within a range of 0±5 degrees. In an embodiment, the third direction D3 and the first direction D1 are preferably parallel to each other.

圖2是依據本發明的一實施例的顯示裝置的擴光膜的剖面圖。請同時參考圖1與圖2，在本實施例中，擴光膜250具有多個沿一第一延伸方向E1延伸的第一微結構252。具體來說，擴光膜250包括基板254，且第一微結構252設置於基板254在相對於光學板212的上表面254S上，但本發明不以此為限。再者，第一微結構252具有多個第一轉折區252F。第一轉折區252F為第一微結構252在相對於光學板212的表面252S的每一局部極值處與其相鄰的局部極值處之間於沿著排列方向A上的高度差L’落在0至10%的範圍內的區域，其中高度為第一微結構252的表面252S與基板254的上表面254S之間的距離。第一轉折區252F的延伸方向垂直於第一微結構252的排列的方向。附帶一提，在圖2的第一轉折區252F1中，第一轉折區252F1包括了局部極值LM2、LM3、LM4。局部極值LM2的第一轉折區為與其相鄰的局部極值LM1和LM3之間的高度差落在0至10%的範圍內的區域。同理，局部極值LM3的第一轉折區為與其相鄰的局部極值LM2和LM4之間的高度差落在0至10%的範圍內的區域，且局部極值LM4的第一轉折區為與其相鄰的局部極值LM3和LM5之間的高度差落在0至10%的範圍內的區域。因此，為了方便示意，圖2的第一轉折區252F1包括了前述的局部極值LM2、LM3、LM4的三個第一轉折區。2 is a cross-sectional view of a light diffusing film of a display device according to an embodiment of the invention. Please refer to FIG. 1 and FIG. 2 at the same time. In this embodiment, the light diffusing film 250 has a plurality of first microstructures 252 extending along a first extension direction E1. Specifically, the light diffusing film 250 includes a substrate 254, and the first microstructure 252 is disposed on the substrate 254 on the upper surface 254S opposite to the optical plate 212, but the present invention is not limited thereto. Furthermore, the first microstructure 252 has a plurality of first turning regions 252F. The first turning area 252F is the height difference L′ of the first microstructure 252 between each local extremum relative to the surface 252S of the optical plate 212 and its adjacent local extremum along the arrangement direction A. The area in the range of 0 to 10%, where the height is the distance between the surface 252S of the first microstructure 252 and the upper surface 254S of the substrate 254. The extension direction of the first turning area 252F is perpendicular to the arrangement direction of the first microstructures 252. Incidentally, in the first turning area 252F1 of FIG. 2, the first turning area 252F1 includes the local extreme values LM2, LM3, and LM4. The first turning area of the local extremum LM2 is an area in which the height difference between the adjacent local extremums LM1 and LM3 falls within a range of 0 to 10%. In the same way, the first turning zone of the local extremum LM3 is the area where the height difference between the adjacent local extremums LM2 and LM4 falls within the range of 0 to 10%, and the first turning zone of the local extremum LM4 It is the area where the height difference between the adjacent local extreme values LM3 and LM5 falls within the range of 0 to 10%. Therefore, for the convenience of illustration, the first turning area 252F1 of FIG. 2 includes the aforementioned three first turning areas of local extrema LM2, LM3, and LM4.

在本實施例中，第一轉折區252F在擴光膜250相對於光學板212的上表面254S的投影面積與第一微結構252在擴光膜250的上表面254S的投影面積的比值大於等於30%且小於等於60%。In this embodiment, the ratio of the projection area of the first turning area 252F on the upper surface 254S of the light diffusing film 250 relative to the optical plate 212 to the projection area of the first microstructure 252 on the upper surface 254S of the light diffusing film 250 is greater than or equal to 30% and less than or equal to 60%.

圖3是依據本發明的一實施例的顯示裝置的輝度增益率相對於第一微結構之間的平均高度L/平均間距P的曲線圖。請同時參考圖2與圖3，在本實施例中，擴光膜250的第一微結構252還滿足以下條件：4%≦L/P≦25%，其中L為第一微結構252的平均高度差，且P為第一微結構252的平均間距。圖3示意了不同的L/P產生了不同的輝度增益率。在一較佳的實施例中，L/P=4%。FIG. 3 is a graph of the luminance gain ratio of the display device according to an embodiment of the present invention with respect to the average height L/average pitch P between the first microstructures. Please refer to FIGS. 2 and 3 at the same time. In this embodiment, the first microstructure 252 of the light diffusing film 250 also satisfies the following condition: 4%≦L/P≦25%, where L is the average of the first microstructure 252 The height difference, and P is the average pitch of the first microstructure 252. Figure 3 shows that different L/Ps produce different luminance gain rates. In a preferred embodiment, L/P=4%.

圖4是依據本發明的一實施例的顯示裝置的上偏光片的剖面圖。請同時參考圖1與圖4，在本實施例中，上偏光片130具有多個沿一第二延伸方向E2的第二微結構132，其中第二延伸方向E2與水平排列方向H之間的夾角小於等於20度。具體來說，上偏光片130包括基板134，且第二微結構132設置於基板134在相對於光學板212的上表面134S上，但本發明不以此為限。再者，第二微結構132具有多個第二轉折區132F。第二轉折區132F為第二微結構132在相對於光學板212的表面132S的每一局部極值處與其相鄰的局部極值處之間於沿著排列方向A上的高度差L’落在0至10%的範圍內的區域，其中高度為第二微結構132的表面132S與基板134的上表面134S之間的距離。第二轉折區132F的延伸方向垂直於第二微結構132的排列的方向。4 is a cross-sectional view of an upper polarizer of a display device according to an embodiment of the invention. Please refer to FIGS. 1 and 4 at the same time. In this embodiment, the upper polarizer 130 has a plurality of second microstructures 132 along a second extension direction E2, wherein the distance between the second extension direction E2 and the horizontal arrangement direction H The included angle is less than or equal to 20 degrees. Specifically, the upper polarizer 130 includes a substrate 134, and the second microstructure 132 is disposed on the substrate 134 on the upper surface 134S opposite to the optical plate 212, but the present invention is not limited thereto. Furthermore, the second microstructure 132 has a plurality of second turning regions 132F. The second turning area 132F is the height difference L′ of the second microstructure 132 along the arrangement direction A between each local extremum of the surface 132S of the optical plate 212 and its adjacent local extremum. The area in the range of 0 to 10%, where the height is the distance between the surface 132S of the second microstructure 132 and the upper surface 134S of the substrate 134. The extension direction of the second turning area 132F is perpendicular to the arrangement direction of the second microstructure 132.

在本實施例中，第二轉折區132F在上偏光片130相對於光學板212的上表面134S的投影面積與第二微結構132在上偏光片130的上表面134S的投影面積的比值大於等於85%且小於等於93%。In this embodiment, the ratio of the projection area of the second turning area 132F on the upper polarizer 130 relative to the upper surface 134S of the optical plate 212 to the projection area of the second microstructure 132 on the upper surface 134S of the upper polarizer 130 is greater than or equal to 85% and 93% or less.

圖5A是依據本發明的一實施例的顯示裝置中，上偏光片未設置第二微結構在垂直視角方向的伽瑪值相對於灰階的曲線圖。圖5B是依據本發明的一實施例的顯示裝置中，上偏光片設置第二微結構在垂直視角方向的伽瑪值相對於灰階的曲線圖。請參考圖5A與圖5B，在圖5A中，曲線C1、C3、C5分別為在垂直視角方向上的視角為30、45、60度的伽瑪值相對於灰階的曲線圖；在圖5B中，曲線C2、C4、C6分別為在垂直視角方向上的視角為30、45、60度的伽瑪值相對於灰階的曲線圖。其中，曲線C1的平均伽瑪值約為1.2，且曲線C2的平均伽瑪值約為1.3；曲線C3的平均伽瑪值約為0.5，且曲線C4的平均伽瑪值約為0.8；曲線C5的平均伽瑪值約為-0.1，且曲線C6的平均伽瑪值約為0.5。也就是說，當在本發明的一實施例的顯示裝置10中的上偏光片130設置了第二微結構132時，顯示裝置10的整體的伽瑪值較佳，且第二微結構132的設置也克服了顯示裝置在垂直視角方向上的大視角處的灰階反轉的問題。5A is a graph of the gamma value versus gray scale in the vertical viewing angle direction of the display device without the second microstructure on the upper polarizer according to an embodiment of the present invention. FIG. 5B is a graph of the gamma value in the vertical viewing angle direction with respect to the gray scale in the display device with the upper polarizer provided with the second microstructure in an embodiment of the present invention. Please refer to FIG. 5A and FIG. 5B. In FIG. 5A, curves C1, C3, and C5 are graphs of gamma values versus gray scales with viewing angles of 30, 45, and 60 degrees in the vertical viewing direction, respectively; in FIG. 5B Among them, the curves C2, C4, and C6 are graphs of gamma values versus gray scales with viewing angles of 30, 45, and 60 degrees in the vertical viewing angle direction, respectively. Among them, the average gamma value of curve C1 is about 1.2, and the average gamma value of curve C2 is about 1.3; the average gamma value of curve C3 is about 0.5, and the average gamma value of curve C4 is about 0.8; curve C5 The average gamma value of is about -0.1, and the average gamma value of curve C6 is about 0.5. That is to say, when the second microstructure 132 is provided on the upper polarizer 130 in the display device 10 of an embodiment of the present invention, the overall gamma value of the display device 10 is better, and the second microstructure 132 has a better The arrangement also overcomes the problem of grayscale inversion of the display device at a large viewing angle in the vertical viewing angle direction.

圖6A是依據本發明的一實施例的顯示裝置的第一稜鏡片或第二稜鏡片的剖面圖。請同時參考圖1與圖6A，在圖1中，為了清楚呈現第一稜鏡微結構222與第二稜鏡微結構232的結構，圖1僅繪示了一個第一稜鏡微結構222與第二稜鏡微結構232。在本實施例中，第一稜鏡片220具有多個沿一第三延伸方向E3延伸的第一稜鏡微結構222，其中第三延伸方向E3與第一方向D1之間的夾角落在90±20度的範圍內。第二稜鏡片230具有多個沿一第四延伸方向E4延伸的第二稜鏡微結構232，其中第四延伸方向E4與第一方向D1之間的夾角小於等於20度。在一實施例中，第三延伸方向E3與第四延伸方向E4較佳是互相垂直。FIG. 6A is a cross-sectional view of the first or second ridge of the display device according to an embodiment of the present invention. Please refer to FIG. 1 and FIG. 6A at the same time. In FIG. 1, in order to clearly show the structure of the first microstructure 222 and the second microstructure 232, FIG. 1 only shows a first microstructure 222 and The second 稜鏡 microstructure 232. In this embodiment, the first scallop sheet 220 has a plurality of first scallop microstructures 222 extending along a third extension direction E3, wherein the corner between the third extension direction E3 and the first direction D1 is 90± Within 20 degrees. The second scallop sheet 230 has a plurality of second scallop microstructures 232 extending along a fourth extension direction E4, wherein the included angle between the fourth extension direction E4 and the first direction D1 is less than or equal to 20 degrees. In one embodiment, the third extension direction E3 and the fourth extension direction E4 are preferably perpendicular to each other.

在本實施例中，擴光膜250的第一延伸方向E1與第二稜鏡片230的第四延伸方向E4之間的夾角落在45±10度的範圍內。In this embodiment, the corner between the first extension direction E1 of the light diffusing film 250 and the fourth extension direction E4 of the second scallop 230 is within a range of 45±10 degrees.

具體來說，本實施例的第一稜鏡片220包括基板224，且第一稜鏡微結構222設置於基板224在相對於光學板212的上表面224S1上，但本發明不以此為限。再者，第一稜鏡微結構222具有多個第三轉折區222F。第三轉折區222F為第一稜鏡微結構222在相對於光學板212的表面222S的每一局部極值處與其相鄰的局部極值處之間於沿著排列方向A上的高度差L’落在0至10%的範圍內的區域，其中高度為第一稜鏡微結構222的表面222S與基板224的上表面224S1之間的距離。第三轉折區222F的延伸方向垂直於第一稜鏡微結構222的排列的方向。Specifically, the first ridge sheet 220 of this embodiment includes a substrate 224, and the first ridge microstructure 222 is disposed on the substrate 224 on the upper surface 224S1 opposite to the optical plate 212, but the invention is not limited thereto. Furthermore, the first microstructure 222 has a plurality of third turning regions 222F. The third turning area 222F is the height difference L between each local extremum of the first microstructure 222 relative to the surface 222S of the optical plate 212 and its adjacent local extremum along the arrangement direction A. The area falling within the range of 0 to 10%, where the height is the distance between the surface 222S of the first microstructure 222 and the upper surface 224S1 of the substrate 224. The extension direction of the third turning area 222F is perpendicular to the arrangement direction of the first ridged microstructures 222.

在本實施例中，第三轉折區222F在第一稜鏡片220相對於光學板212的上表面224S1的投影面積與第一稜鏡微結構222在第一稜鏡片220的上表面224S1的投影面積的比值大於等於21%且小於等於25%。In the present embodiment, the projection area of the third turning area 222F on the upper surface 224S1 of the first ridge sheet 220 relative to the optical plate 212 and the projection area of the first ridge microstructure 222 on the upper surface 224S1 of the first ridge sheet 220 The ratio of is greater than or equal to 21% and less than or equal to 25%.

相同的，本實施例的第二稜鏡片230包括基板234，且第二稜鏡微結構232設置於基板234在相對於光學板212的上表面234S1上，但本發明不以此為限。再者，第二稜鏡微結構232具有多個第四轉折區232F。第四轉折區232F為第二稜鏡微結構232在相對於光學板212的表面232S的每一局部極值處與其相鄰的局部極值處之間於沿著排列方向A上的高度差L’落在0至10%的範圍內的區域，其中高度為第二稜鏡微結構232的表面232S與基板234的上表面234S1之間的距離。第四轉折區232F的延伸方向垂直於第二稜鏡微結構232的排列的方向。Similarly, the second sheet 230 of this embodiment includes a substrate 234, and the second microstructure 232 is disposed on the substrate 234 on the upper surface 234S1 opposite to the optical plate 212, but the invention is not limited thereto. Furthermore, the second microstructure 232 has a plurality of fourth turning regions 232F. The fourth turning area 232F is the height difference L along the arrangement direction A between each local extremum of the second 稜鏡 microstructure 232 relative to the surface 232S of the optical plate 212 and its adjacent local extremum. The area falling within the range of 0 to 10%, where the height is the distance between the surface 232S of the second microstructure 232 and the upper surface 234S1 of the substrate 234. The extension direction of the fourth turning area 232F is perpendicular to the arrangement direction of the second ridged microstructures 232.

在本實施例中，第四轉折區232F在第二稜鏡片230相對於光學板212的上表面234S1的投影面積與第二稜鏡微結構232在第二稜鏡片230的上表面234S1的投影面積的比值大於等於21%且小於等於25%。In the present embodiment, the projection area of the fourth turning area 232F on the upper surface 234S1 of the second optical plate 230 relative to the optical plate 212 and the projected area of the second microstructure 232 on the upper surface 234S1 of the second optical plate 230 The ratio of is greater than or equal to 21% and less than or equal to 25%.

圖6B是圖6A在第一稜鏡微結構或第二稜鏡微結構的局部放大圖。請參考圖6B，在本實施例中，第一稜鏡微結構222與第二稜鏡微結構232的在相對於光學板212的稜鏡尖端222T與232T可為圓角。再者，每一第二稜鏡微結構232的稜鏡尖端232T的曲率半徑R2小於等於每一第一稜鏡微結構222的稜鏡尖端232T的曲率半徑R1。Fig. 6B is a partial enlarged view of Fig. 6A in the first microstructure or the second microstructure. Please refer to FIG. 6B. In this embodiment, the tips 222T and 232T of the first microstructure 222 and the second microstructure 232 relative to the optical plate 212 may be rounded. Furthermore, the radius of curvature R2 of the tip 232T of each second microstructure 232 is less than or equal to the radius of curvature R1 of the tip 232T of each first microstructure 222.

圖7是依據本發明的一實施例的顯示裝置中，第一稜鏡片的第一稜鏡微結構的稜鏡尖端的曲率半徑大於及小於第二稜鏡片的第二稜鏡微結構的稜鏡尖端的曲率半徑在最低灰階時且水平視角方向的相對輝度值相對於視角的曲線圖。圖7中的曲線C7為第一稜鏡微結構222的稜鏡尖端222T的曲率半徑R1小於第二稜鏡微結構232的稜鏡尖端232T的曲率半徑R2，其中R1為0.5微米，且R2為7微米；曲線C8為第一稜鏡微結構222的稜鏡尖端222T的曲率半徑R1大於第二稜鏡微結構232的稜鏡尖端232T的曲率半徑R2，其中R1為7微米，且R2為0.5微米。請參考圖7，在本發明的一實施例的顯示裝置10中，當第二稜鏡微結構232的稜鏡尖端232T的曲率半徑R2小於等於第一稜鏡微結構222的稜鏡尖端232T的曲率半徑R1時，顯示裝置10在最低灰階時的大視角漏光的問題被改善了。FIG. 7 is a display device according to an embodiment of the present invention, the radius of curvature of the tip of the first ridge microstructure of the first ridge is greater than and smaller than the radius of curvature of the second ridge of the second ridge of the second plate in the display device according to an embodiment of the present invention. The curve graph of the relative luminance value of the horizontal viewing angle direction with respect to the viewing angle when the radius of curvature of the tip is at the lowest gray level. The curve C7 in FIG. 7 shows that the radius of curvature R1 of the tip 222T of the first microstructure 222 is smaller than the radius of curvature R2 of the tip 232T of the second microstructure 232, where R1 is 0.5 microns, and R2 is 7 microns; the curve C8 is that the radius of curvature R1 of the tip 222T of the first microstructure 222 is greater than the radius of curvature R2 of the tip 232T of the second microstructure 232, where R1 is 7 microns, and R2 is 0.5 Micrometers. Please refer to FIG. 7, in the display device 10 of an embodiment of the present invention, when the radius of curvature R2 of the ridge tip 232T of the second ridge microstructure 232 is less than or equal to that of the ridge tip 232T of the first ridge microstructure 222 With the radius of curvature R1, the problem of light leakage at a large viewing angle of the display device 10 at the lowest gray level is improved.

在本實施例中，第二稜鏡片230的稜鏡折射率大於等於第一稜鏡片220的稜鏡折射率。圖8是依據本發明的一實施例的顯示裝置中，第一稜鏡片的稜鏡折射率大於及小於第二稜鏡片的稜鏡折射率在最低灰階時且水平視角方向的相對輝度值相對於視角的曲線圖。圖8中的曲線C9示意了第一稜鏡片220的稜鏡折射率為1.65，且第二稜鏡片230的稜鏡折射率為1.52；曲線C10示意了第一稜鏡片220的稜鏡折射率為1.52，且第二稜鏡片230的稜鏡折射率為1.65。請參考圖8，在本發明的一實施例的顯示裝置10中，當第二稜鏡片230的稜鏡折射率大於等於第一稜鏡片220的稜鏡折射率時，顯示裝置10在最低灰階時的大視角漏光的問題也被改善了。In this embodiment, the refractive index of the second sheet 230 is greater than or equal to the refractive index of the first sheet 220. 8 is a display device according to an embodiment of the present invention, the refractive index of the first film is greater than and smaller than the refractive index of the second film at the lowest gray level and the relative luminance value in the horizontal viewing angle direction is relatively A graph based on the viewing angle. Curve C9 in FIG. 8 indicates that the refractive index of the first sheet 220 is 1.65, and the refractive index of the second sheet 230 is 1.52; the curve C10 indicates that the refractive index of the first sheet 220 is 1.52, and the refractive index of the second sheet 230 is 1.65. Referring to FIG. 8, in the display device 10 of an embodiment of the present invention, when the refractive index of the second sheet 230 is greater than or equal to the refractive index of the first sheet 220, the display device 10 is at the lowest gray scale The problem of light leakage at large viewing angles has also been improved.

請再參考圖6A，在一實施例中，第一稜鏡片220與第二稜鏡片230分別在朝向光學板212的下表面224S2、234S2具有一第一霧化結構層226與一第二霧化結構層236，其中第二霧化結構層236的霧度較佳是小於等於第一霧化結構層226的霧度。圖9是依據本發明的一實施例的顯示裝置中，第一稜鏡片的第一霧化結構層的霧度大於及小於第二稜鏡片的第二霧化結構層的霧度在最低灰階時且水平視角方向的相對輝度值相對於視角的曲線圖。圖9中的曲線C11示意了第一霧化結構層226的霧度為3%，且第二霧化結構層236的霧度為8%；曲線C12示意了第一霧化結構層226的霧度為8%，且第二霧化結構層236的霧度為3%。請參考圖9，在本發明的一實施例的顯示裝置10中，當第二霧化結構層236的霧度小於等於第一霧化結構層226的霧度時，顯示裝置10在最低灰階時的大視角漏光的問題也被改善了。Please refer to FIG. 6A again. In one embodiment, the first ridge sheet 220 and the second ridge sheet 230 respectively have a first atomization structure layer 226 and a second atomization structure on the lower surface 224S2, 234S2 facing the optical plate 212 The structure layer 236, wherein the haze of the second atomized structure layer 236 is preferably less than or equal to the haze of the first atomized structure layer 226. 9 is a display device according to an embodiment of the present invention, the haze of the first atomized structure layer of the first sheet is greater than and smaller than the haze of the second atomized structure layer of the second sheet at the lowest gray level Time and horizontal viewing angle relative brightness value versus viewing angle curve. The curve C11 in FIG. 9 indicates that the haze of the first atomization structure layer 226 is 3%, and the haze of the second atomization structure layer 236 is 8%; the curve C12 indicates the fog of the first atomization structure layer 226 The degree is 8%, and the haze of the second atomization structure layer 236 is 3%. Please refer to FIG. 9, in the display device 10 of an embodiment of the present invention, when the haze of the second atomized structure layer 236 is less than or equal to the haze of the first atomized structure layer 226, the display device 10 is at the lowest gray level. The problem of light leakage at large viewing angles has also been improved.

圖10A是依據本發明的一實施例的顯示裝置的出光光形的一種示例。圖10B是依據本發明的一實施例的顯示裝置的背光模組的出光光形的一種示例。圖10A與圖10B示意了顯示裝置10與背光模組200的擴光膜250的第一延伸方向E1在軸向0度，反射式偏極化膜片240的第三方向D3在軸向45度，第二稜鏡片230的第四延伸方向E4在軸向45度，且第一稜鏡片220的第三延伸方向E3在軸向135度。請參考圖10A與圖10B，在本發明的一實施例的顯示裝置10中，由於顯示裝置10各模層的設置，背光模組200的出光光形較為對稱且準直，且顯示裝置10所呈現的顯示畫面的光形也較為對稱。FIG. 10A is an example of a light shape of a display device according to an embodiment of the present invention. FIG. 10B is an example of the light-emitting shape of the backlight module of the display device according to an embodiment of the present invention. 10A and 10B illustrate that the first extension direction E1 of the light diffusing film 250 of the display device 10 and the backlight module 200 is 0 degrees in the axial direction, and the third direction D3 of the reflective polarizing film 240 is 45 degrees in the axial direction. , The fourth extension direction E4 of the second ridge piece 230 is 45 degrees in the axial direction, and the third extension direction E3 of the first ridge piece 220 is 135 degrees in the axial direction. 10A and 10B, in the display device 10 of an embodiment of the present invention, due to the arrangement of the mold layers of the display device 10, the light output of the backlight module 200 is more symmetrical and collimated, and the display device 10 is The light shape of the displayed display screen is also more symmetrical.

圖11A是依據本發明的一實施例的顯示裝置在最低灰階時且水平視角方向的相對輝度值相對於視角的曲線圖。圖11B是依據本發明的一實施例的顯示裝置在最低灰階時且垂直視角方向的相對輝度值相對於視角的曲線圖。圖11A與圖11B中的曲線C13與C15為顯示裝置未設置擴光膜，且其反射式偏極化膜片的第三方向在軸向45度，第二稜鏡片的第四延伸方向在軸向150度，以及第一稜鏡片的第三延伸方向在軸向60度；曲線C14與C16為顯示裝置的擴光膜250的第一延伸方向E1在軸向0度，反射式偏極化膜片240的第三方向D3在軸向45度，第二稜鏡片230的第四延伸方向E4在軸向45度，且第一稜鏡片220的第三延伸方向E3在軸向135度。請參考圖11A與圖11B，在本發明的一實施例的顯示裝置10中，由於顯示裝置10各模層的設置，顯示裝置10在最低灰階時的垂直視角及水平視角於大視角的峰值減少了40%，因此，顯示裝置10在最低灰階時的垂直視角及水平視角的大視角漏光的問題有效地被改善了。FIG. 11A is a graph of the relative luminance value in the horizontal viewing angle direction with respect to the viewing angle of the display device according to an embodiment of the present invention at the lowest gray level. FIG. 11B is a graph of the relative luminance value in the vertical viewing angle direction with respect to the viewing angle of the display device according to an embodiment of the present invention at the lowest gray level. The curves C13 and C15 in FIGS. 11A and 11B show that the display device is not provided with a light-diffusing film, and the third direction of the reflective polarizing film is 45 degrees in the axial direction, and the fourth extension direction of the second thin film is in the axial direction. 150 degrees, and the third extension direction of the first film is 60 degrees in the axial direction; curves C14 and C16 are the first extension direction E1 of the light diffusing film 250 of the display device at 0 degrees in the axial direction, the reflective polarization film The third direction D3 of the sheet 240 is at 45 degrees in the axial direction, the fourth extension direction E4 of the second sheet 230 is at 45 degrees in the axial direction, and the third direction E3 of the first sheet 220 is at 135 degrees in the axial direction. Please refer to FIGS. 11A and 11B. In the display device 10 of an embodiment of the present invention, due to the arrangement of the various modes of the display device 10, the vertical viewing angle and the horizontal viewing angle of the display device 10 at the lowest gray level are at the peak of the large viewing angle. It is reduced by 40%. Therefore, the problem of light leakage of the vertical viewing angle and the large viewing angle of the horizontal viewing angle of the display device 10 at the lowest gray level is effectively improved.

除此之外，在本實施例中，影像光在沿著液晶模組10的60度視角的32至192灰階值的範圍內的伽瑪平均值於水平視角方向大於垂直視角方向。In addition, in this embodiment, the average gamma value of the image light in the range of 32 to 192 gray scale values along the 60-degree viewing angle of the liquid crystal module 10 is greater in the horizontal viewing angle direction than in the vertical viewing angle direction.

綜上所述，在本發明的一實施例的顯示裝置中，由於反射式偏極化膜片上設置了擴光膜，以及顯示裝置中各膜層的搭配，因此，顯示裝置的背光模組所提供的面光源的光形較為對稱且準直，以及顯示裝置在最低灰階時的垂直視角及水平視角的大視角漏光的問題有效地被改善了。此外，顯示裝置採用雙域式液晶層，因此顯示裝置的輝度表現較佳。In summary, in the display device of an embodiment of the present invention, because the reflective polarizing film is provided with a light-diffusing film and the combination of various layers in the display device, the backlight module of the display device The light shape of the provided surface light source is more symmetrical and collimated, and the problem of light leakage from the vertical viewing angle and the horizontal viewing angle of the display device at the lowest gray level is effectively improved. In addition, the display device adopts a dual-domain liquid crystal layer, so the brightness performance of the display device is better.

10:顯示裝置10: Display device

100:液晶模組100: LCD module

110:雙域式液晶層110: Dual domain liquid crystal layer

120:下偏光片120: Lower polarizer

130:上偏光片130: upper polarizer

132:第二微結構132: The second microstructure

132F:第二轉折區132F: The second turning area

132S、252S、222S、232S:表面132S, 252S, 222S, 232S: surface

134、224、234、254:基板134, 224, 234, 254: substrate

134S、224S1、234S1、254S:上表面134S, 224S1, 234S1, 254S: upper surface

200:背光模組200: Backlight module

210:出光模組210: Light emitting module

212:光學板212: Optical Board

212S1:出光面212S1: Glossy surface

212S2:入光面212S2: Glossy surface

214:光源214: light source

220:第一稜鏡片220: The first 稜鏡 piece

222:第一稜鏡微結構222: The first microstructure

222F:第三轉折區222F: The third turning area

222T、232T:尖端222T, 232T: tip

224S2、234S2:下表面224S2, 234S2: bottom surface

226:第一霧化結構層226: The first atomization structure layer

230:第二稜鏡片230: The second 稜鏡 piece

232:第二稜鏡微結構232: The second microstructure

232F:第三轉折區232F: The third turning area

236:第二霧化結構層236: The second atomization structure layer

240:反射式偏極化膜片240: Reflective polarization diaphragm

250:擴光膜250: light diffusion film

252:第一微結構252: The first microstructure

252F、252F1:第一轉折區252F, 252F1: the first turning area

260:量子點層260: Quantum dot layer

A:排列方向A: Arrangement direction

C1、C2、C3、C4、C5、C6、C7、C8、C9、C10、C11、C12、C13、C14、C15、C16:曲線C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16: Curve

D1:第一方向D1: First direction

D2:第二方向D2: second direction

D3:第三方向D3: Third party

E1:第一延伸方向E1: The first extension direction

E2:第二延伸方向E2: second extension direction

E3:第三延伸方向E3: Third extension direction

E4:第四延伸方向E4: Fourth extension direction

H:水平排列方向H: Horizontal arrangement direction

L’:高度差L’: Height difference

LM1、LM2、LM3、LM4、LM5:局部極值LM1, LM2, LM3, LM4, LM5: local extremum

P:間距P: Pitch

R1、R2:曲率半徑R1, R2: radius of curvature

圖1是依據本發明的一實施例的顯示裝置的立體***圖。 圖2是依據本發明的一實施例的顯示裝置的擴光膜的剖面圖。 圖3是依據本發明的一實施例的顯示裝置的輝度增益率相對於第一微結構之間的平均高度L/平均間距P的曲線圖。 圖4是依據本發明的一實施例的顯示裝置的上偏光片的剖面圖。 圖5A是依據本發明的一實施例的顯示裝置中，上偏光片未設置第二微結構在垂直視角方向的伽瑪值相對於灰階的曲線圖。 圖5B是依據本發明的一實施例的顯示裝置中，上偏光片設置第二微結構在垂直視角方向的伽瑪值相對於灰階的曲線圖。 圖6A是依據本發明的一實施例的顯示裝置的第一稜鏡片或第二稜鏡片的剖面圖。 圖6B是圖6A在第一稜鏡微結構或第二稜鏡微結構的局部放大圖。 圖7是依據本發明的一實施例的顯示裝置中，第一稜鏡片的第一稜鏡微結構的稜鏡尖端的曲率半徑大於及小於第二稜鏡片的第二稜鏡微結構的稜鏡尖端的曲率半徑在最低灰階時且水平視角方向的相對輝度值相對於視角的曲線圖。 圖8是依據本發明的一實施例的顯示裝置中，第一稜鏡片的稜鏡折射率大於及小於第二稜鏡片的稜鏡折射率在最低灰階時且水平視角方向的相對輝度值相對於視角的曲線圖。 圖9是依據本發明的一實施例的顯示裝置中，第一稜鏡片的第一霧化結構層的霧度大於及小於第二稜鏡片的第二霧化結構層的霧度在最低灰階時且水平視角方向的相對輝度值相對於視角的曲線圖。 圖10A是依據本發明的一實施例的顯示裝置的出光光形的一種示例。 圖10B是依據本發明的一實施例的顯示裝置的背光模組的出光光形的一種示例。 圖11A是依據本發明的一實施例的顯示裝置在最低灰階時且水平視角方向的相對輝度值相對於視角的曲線圖。 圖11B是依據本發明的一實施例的顯示裝置在最低灰階時且垂直視角方向的相對輝度值相對於視角的曲線圖。 FIG. 1 is a three-dimensional exploded view of a display device according to an embodiment of the invention. 2 is a cross-sectional view of a light diffusing film of a display device according to an embodiment of the invention. FIG. 3 is a graph of the luminance gain ratio of the display device according to an embodiment of the present invention with respect to the average height L/average pitch P between the first microstructures. 4 is a cross-sectional view of an upper polarizer of a display device according to an embodiment of the invention. 5A is a graph of the gamma value versus gray scale in the vertical viewing angle direction of the display device without the second microstructure on the upper polarizer according to an embodiment of the present invention. FIG. 5B is a graph of the gamma value in the vertical viewing angle direction with respect to the gray scale in the display device with the upper polarizer provided with the second microstructure in an embodiment of the present invention. FIG. 6A is a cross-sectional view of the first or second ridge of the display device according to an embodiment of the present invention. Fig. 6B is a partial enlarged view of Fig. 6A in the first microstructure or the second microstructure. FIG. 7 is a display device according to an embodiment of the present invention, the radius of curvature of the tip of the first ridge microstructure of the first ridge is greater than and smaller than the radius of curvature of the second ridge of the second ridge of the second plate in the display device according to an embodiment of the present invention. The curve graph of the relative luminance value of the horizontal viewing angle direction with respect to the viewing angle when the radius of curvature of the tip is at the lowest gray level. 8 is a display device according to an embodiment of the present invention, the refractive index of the first film is greater than and smaller than the refractive index of the second film at the lowest gray level and the relative luminance value in the horizontal viewing angle direction is relatively A graph based on the viewing angle. 9 is a display device according to an embodiment of the present invention, the haze of the first atomized structure layer of the first sheet is greater than and smaller than the haze of the second atomized structure layer of the second sheet at the lowest gray level Time and horizontal viewing angle relative brightness value versus viewing angle curve. FIG. 10A is an example of a light shape of a display device according to an embodiment of the present invention. FIG. 10B is an example of the light-emitting shape of the backlight module of the display device according to an embodiment of the present invention. FIG. 11A is a graph of the relative luminance value in the horizontal viewing angle direction with respect to the viewing angle of the display device according to an embodiment of the present invention at the lowest gray level. FIG. 11B is a graph of the relative luminance value in the vertical viewing angle direction with respect to the viewing angle of the display device according to an embodiment of the present invention at the lowest gray level.

10:顯示裝置 10: Display device

100:液晶模組 100: LCD module

110:雙域式液晶層 110: Dual domain liquid crystal layer

120:下偏光片 120: Lower polarizer

130:上偏光片 130: upper polarizer

132:第二微結構 132: The second microstructure

200:背光模組 200: Backlight module

210:出光模組 210: Light emitting module

212:光學板 212: Optical Board

212S1:出光面 212S1: Glossy surface

212S2:入光面 212S2: Glossy surface

214:光源 214: light source

220:第一稜鏡片 220: The first 稜鏡 piece

222:第一稜鏡微結構 222: The first microstructure

230:第二稜鏡片 230: The second 稜鏡 piece

232:第二稜鏡微結構 232: The second microstructure

240:反射式偏極化膜片 240: Reflective polarization diaphragm

250:擴光膜 250: light diffusion film

252:第一微結構 252: The first microstructure

260:量子點層 260: Quantum dot layer

A:排列方向 A: Arrangement direction

D1:第一方向 D1: First direction

D2:第二方向 D2: second direction

D3:第三方向 D3: Third party

E1:第一延伸方向 E1: The first extension direction

E2:第二延伸方向 E2: second extension direction

E3:第三延伸方向 E3: Third extension direction

E4:第四延伸方向 E4: Fourth extension direction

H:水平排列方向 H: Horizontal arrangement direction

Claims (19)

一種顯示裝置，包括：一液晶模組，包括：一雙域式液晶層，其中該雙域式液晶層的液晶分子在未施加電壓時沿一水平排列方向排列；一下偏光片，具有沿一第一方向的穿透軸，其中該第一方向與該水平排列方向之間的夾角落在45±5度的範圍內；以及一上偏光片，具有沿一第二方向的穿透軸，其中該下偏光片、該雙域式液晶層與該上偏光片在一排列方向上依序排列；以及一背光模組，用以提供一面光源，該背光模組包括：一出光模組，包括：一光學板，具有一出光面以及一入光面；以及一光源，設置在該光學板的該入光面的一側；一第一稜鏡片；一第二稜鏡片；一反射式偏極化膜片，具有沿一第三方向的穿透軸，其中該第三方向與該第一方向之間的夾角落在0±5度的範圍內；以及一擴光膜，具有多個沿一第一延伸方向延伸的第一微結構； 其中該出光模組、該第一稜鏡片、該第二稜鏡片、該反射式偏極化膜片、該擴光膜與該液晶模組在該排列方向上依序排列，由該出光模組所發出的光經過該光學板的該出光面射出，再依序經過該第一稜鏡片、該第二稜鏡片、該反射式偏極化膜片、該擴光膜與該液晶模組，以形成一影像光，其中該第二稜鏡片的稜鏡折射率大於等於該第一稜鏡片的稜鏡折射率。 A display device includes: a liquid crystal module, including: a dual domain liquid crystal layer, wherein the liquid crystal molecules of the dual domain liquid crystal layer are arranged along a horizontal arrangement direction when no voltage is applied; A penetration axis in one direction, wherein the corner between the first direction and the horizontal arrangement direction is within a range of 45±5 degrees; and an upper polarizer having a penetration axis in a second direction, wherein the The lower polarizer, the dual domain liquid crystal layer, and the upper polarizer are sequentially arranged in an arrangement direction; and a backlight module for providing a surface light source. The backlight module includes: a light emitting module, including: a The optical plate has a light-emitting surface and a light-incident surface; and a light source disposed on one side of the light-incident surface of the optical plate; a first optical plate; a second optical plate; a reflective polarization film Sheet, having a penetration axis along a third direction, wherein the corner between the third direction and the first direction is within a range of 0±5 degrees; and a light-diffusing film having a plurality of first The first microstructure extending in the extension direction; The light emitting module, the first light emitting film, the second light emitting film, the reflective polarization film, the light diffusing film and the liquid crystal module are arranged in sequence in the arrangement direction, and the light emitting module The emitted light is emitted through the light-emitting surface of the optical plate, and then sequentially passes through the first film, the second film, the reflective polarizing film, the light diffusing film and the liquid crystal module, and An image light is formed, wherein the refractive index of the second sheet is greater than or equal to the refractive index of the first sheet. 如請求項1所述的顯示裝置，其中該上偏光片的該第二方向與該下偏光片的該第一方向之間的夾角落在90±5度的範圍內，且該上偏光片具有多個沿一第二延伸方向的第二微結構，該第二延伸方向與該水平排列方向之間的夾角小於等於20度。 The display device according to claim 1, wherein the corner between the second direction of the upper polarizer and the first direction of the lower polarizer is within a range of 90±5 degrees, and the upper polarizer has A plurality of second microstructures along a second extension direction, the included angle between the second extension direction and the horizontal arrangement direction is less than or equal to 20 degrees. 如請求項2所述的顯示裝置，其中該第一稜鏡片具有多個沿一第三延伸方向延伸的第一稜鏡微結構，其中該第三延伸方向與該第一方向之間的夾角落在90±20度的範圍內。 The display device according to claim 2, wherein the first ridge sheet has a plurality of first ridged microstructures extending along a third extending direction, wherein the corner between the third extending direction and the first direction Within the range of 90±20 degrees. 如請求項3所述的顯示裝置，其中該第二稜鏡片具有多個沿一第四延伸方向延伸的第二稜鏡微結構，其中該第四延伸方向與該第一方向之間的夾角小於等於20度。 The display device according to claim 3, wherein the second ridge sheet has a plurality of second ridged microstructures extending along a fourth extension direction, wherein the included angle between the fourth extension direction and the first direction is less than Equal to 20 degrees. 如請求項4所述的顯示裝置，其中該擴光膜的該第一延伸方向與該第二稜鏡片的該第四延伸方向之間的夾角落在45±10度的範圍內。 The display device according to claim 4, wherein the corner between the first extension direction of the light-diffusing film and the fourth extension direction of the second sheet is within a range of 45±10 degrees. 如請求項5所述的顯示裝置，其中該些第一微結構、該些第二微結構、該些第一稜鏡微結構與該些第二稜鏡微結構分 別具有多個第一轉折區、多個第二轉折區、多個第三轉折區與多個第四轉折區，該些第一轉折區、該些第二轉折區、該些第三轉折區與該些第四轉折區分別為該些第一微結構、該些第二微結構、該些第一稜鏡微結構與該些第二稜鏡微結構在相對於該光學板的表面的每一局部極值處與其相鄰的局部極值處之間於沿著該排列方向上的高度差落在0至10%的範圍內的區域；該些第一轉折區、該些第二轉折區、該些第三轉折區與該些第四轉折區的延伸方向分別垂直於該些第一微結構、該些第二微結構、該些第一稜鏡微結構與該些第二稜鏡微結構的排列的方向。 The display device according to claim 5, wherein the first microstructures, the second microstructures, the first microstructures and the second microstructures are separated There are multiple first turning areas, multiple second turning areas, multiple third turning areas, and multiple fourth turning areas, the first turning areas, the second turning areas, and the third turning areas And the fourth turning regions are the first microstructures, the second microstructures, the first microstructures, and the second microstructures on each surface relative to the optical plate. The area where the height difference between a local extreme value and its neighboring local extreme values along the arrangement direction falls within a range of 0 to 10%; the first turning areas and the second turning areas , The extension directions of the third turning regions and the fourth turning regions are respectively perpendicular to the first microstructures, the second microstructures, the first microstructures, and the second microstructures. The direction of the arrangement of the structure. 如請求項6所述的顯示裝置，其中該些第一轉折區在該擴光膜相對於該光學板的上表面的投影面積與該些第一微結構在該擴光膜的該上表面的投影面積的比值大於等於30%且小於等於60%。 The display device according to claim 6, wherein the projection area of the first turning areas on the upper surface of the light-expanding film relative to the optical plate and the difference between the first microstructures on the upper surface of the light-expanding film The ratio of the projected area is greater than or equal to 30% and less than or equal to 60%. 如請求項6所述的顯示裝置，其中該些第二轉折區在該上偏光片相對於該光學板的上表面的投影面積與該些第二微結構在該上偏光片的該上表面的投影面積的比值大於等於85%且小於等於93%。 The display device according to claim 6, wherein the projection area of the second turning areas on the upper polarizer relative to the upper surface of the optical plate and the projection area of the second microstructures on the upper surface of the upper polarizer The ratio of the projected area is greater than or equal to 85% and less than or equal to 93%. 如請求項6所述的顯示裝置，其中該些第三轉折區在該第一稜鏡片相對於該光學板的上表面的投影面積與該些第一稜鏡微結構在該第一稜鏡片的該上表面的投影面積的比值大於等於21%且小於等於25%。 The display device according to claim 6, wherein the projected area of the third turning areas on the upper surface of the first optical plate and the projection area of the first optical microstructures on the first optical plate The ratio of the projected area of the upper surface is greater than or equal to 21% and less than or equal to 25%. 如請求項6所述的顯示裝置，其中該些第四轉折區在該第二稜鏡片相對於該光學板的上表面的投影面積與該些第二稜鏡微結構在該些第二稜鏡片的該上表面的投影面積的比值大於等於21%且小於等於25%。 The display device according to claim 6, wherein the projection area of the fourth turning areas on the second ridge sheet relative to the upper surface of the optical plate and the second ridge microstructures on the second ridge sheet The ratio of the projected area of the upper surface is greater than or equal to 21% and less than or equal to 25%. 如請求項1所述的顯示裝置，其中該些第一微結構的平均高度差為L，平均間距為P，且4%≦L/P≦25%。 The display device according to claim 1, wherein the average height difference of the first microstructures is L, the average pitch is P, and 4%≦L/P≦25%. 如請求項4所述的顯示裝置，其中每一第二稜鏡微結構在相對於該光學板的稜鏡尖端的曲率半徑小於等於每一第一稜鏡微結構在相對於該光學板的稜鏡尖端的曲率半徑。 The display device according to claim 4, wherein the radius of curvature of each second ridge microstructure relative to the ridge tip of the optical plate is less than or equal to the edge of each first ridge microstructure relative to the optical plate The radius of curvature of the mirror tip. 如請求項1所述的顯示裝置，其中該第一稜鏡片與該第二稜鏡片分別在朝向該光學板的下表面具有一第一霧化結構層與一第二霧化結構層，該第二霧化結構層的霧度小於等於該第一霧化結構層的霧度。 The display device according to claim 1, wherein the first ridge sheet and the second ridge sheet respectively have a first atomization structure layer and a second atomization structure layer on the lower surface facing the optical plate, and the first atomization structure layer The haze of the second atomization structure layer is less than or equal to the haze of the first atomization structure layer. 如請求項1所述的顯示裝置，其中該光學板為導光板，且該出光面相鄰於該入光面。 The display device according to claim 1, wherein the optical plate is a light guide plate, and the light-emitting surface is adjacent to the light-incident surface. 如請求項1所述的顯示裝置，其中該光學板為擴散板，且該出光面相對於該入光面。 The display device according to claim 1, wherein the optical plate is a diffuser plate, and the light-emitting surface is opposite to the light-incident surface. 如請求項1所述的顯示裝置，其中該背光模組更包括設置於該光學板上的一量子點層，且該光源包括藍光光源。 The display device according to claim 1, wherein the backlight module further includes a quantum dot layer disposed on the optical plate, and the light source includes a blue light source. 如請求項16所述的顯示裝置，其中該量子點層設置於該光學板與該第一稜鏡片之間。 The display device according to claim 16, wherein the quantum dot layer is disposed between the optical plate and the first sheet. 如請求項1所述的顯示裝置，其中該影像光在沿著該液晶模組的60度視角的32至192灰階值的範圍內的伽瑪平均值於水平視角方向大於垂直視角方向。 The display device according to claim 1, wherein the average gamma value of the image light in the range of 32 to 192 gray scale values along the 60-degree viewing angle of the liquid crystal module is greater in the horizontal viewing angle direction than in the vertical viewing angle direction. 如請求項2所述的顯示裝置，其中該影像光在沿著該液晶模組的60度視角的32至192灰階值的範圍內的伽瑪平均值於水平視角方向大於垂直視角方向。The display device according to claim 2, wherein the average gamma value of the image light in the range of 32 to 192 gray scale values along the 60-degree viewing angle of the liquid crystal module is greater in the horizontal viewing angle direction than in the vertical viewing angle direction.
TW109127711A 2020-08-14 2020-08-14 Display device TWI738465B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
TW109127711A TWI738465B (en) 2020-08-14 2020-08-14 Display device
CN202011607047.6A CN112526783B (en) 2020-08-14 2020-12-30 Display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW109127711A TWI738465B (en) 2020-08-14 2020-08-14 Display device

Publications (2)

Publication Number Publication Date
TWI738465B true TWI738465B (en) 2021-09-01
TW202206908A TW202206908A (en) 2022-02-16

Family

ID=74977081

Family Applications (1)

Application Number Title Priority Date Filing Date
TW109127711A TWI738465B (en) 2020-08-14 2020-08-14 Display device

Country Status (2)

Country Link
CN (1) CN112526783B (en)
TW (1) TWI738465B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023102802A1 (en) * 2021-12-09 2023-06-15 瑞仪(广州)光电子器件有限公司 Optical film set, backlight module, and display device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150009451A1 (en) * 2012-09-14 2015-01-08 Apple Inc. Displays With Reflective Polarizers
CN106547138A (en) * 2016-12-08 2017-03-29 深圳市华星光电技术有限公司 Display and its display floater

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100520523C (en) * 2007-02-27 2009-07-29 友达光电股份有限公司 Optical diaphragm assembly back light module and liquid crystal display device
TWI358000B (en) * 2008-09-15 2012-02-11 Au Optronics Corp Display device with low scratch visibility and man
CN101852876B (en) * 2009-04-02 2012-06-13 财团法人工业技术研究院 Composite optical diaphragm and surface light source module
TWI657291B (en) * 2018-03-14 2019-04-21 友達光電股份有限公司 Backlight module
CN108897083B (en) * 2018-08-28 2021-09-14 张家港康得新光电材料有限公司 Optical composite film and preparation method thereof
TWI726251B (en) * 2018-10-30 2021-05-01 友達光電股份有限公司 Display module

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150009451A1 (en) * 2012-09-14 2015-01-08 Apple Inc. Displays With Reflective Polarizers
CN106547138A (en) * 2016-12-08 2017-03-29 深圳市华星光电技术有限公司 Display and its display floater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023102802A1 (en) * 2021-12-09 2023-06-15 瑞仪(广州)光电子器件有限公司 Optical film set, backlight module, and display device

Also Published As

Publication number Publication date
CN112526783A (en) 2021-03-19
TW202206908A (en) 2022-02-16
CN112526783B (en) 2022-12-13

Similar Documents

Publication Publication Date Title
US10488708B2 (en) Backlight module
KR102003038B1 (en) Optical film and display device comprising the same
TW201734602A (en) Backlight module and display apparatus
TWI470319B (en) Liquid crystal display
CN105867011B (en) A kind of display panel and display device
TWI726251B (en) Display module
TW548463B (en) Liquid crystal display device
CN211979374U (en) Light modulation assembly, backlight module and liquid crystal display device
CN105700269A (en) Display device
WO2022000689A1 (en) Viewing angle diffusion film and display panel
KR101408324B1 (en) Led lens for wide diffusion light
TWI738465B (en) Display device
CN104280811B (en) Polaroid, liquid crystal panel and liquid crystal display
US7084941B2 (en) Liquid crystal display device
US20090296022A1 (en) Optical sheet, backlight unit, and liquid crystal display
JP2006251352A (en) Display device and lens array sheet
TW200909866A (en) Backlight module and optical film thereof
WO2019148820A1 (en) Optical structure, display device and manufacturing method for optical structure
WO2022002268A1 (en) Display screen, display screen protective film and electronic device
TWI754318B (en) Display apparatus
WO2013081038A1 (en) Light source device, surface light source device, display device and lighting device
CN109407366B (en) Liquid crystal display device having a plurality of pixel electrodes
KR102112838B1 (en) Optical film and display device comprising the same
US20170082897A1 (en) Backlight module and display apparatus
TWM584899U (en) Vehicle display device