TWI711859B - Display device - Google Patents

Display device Download PDF

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Publication number
TWI711859B
TWI711859B TW108144909A TW108144909A TWI711859B TW I711859 B TWI711859 B TW I711859B TW 108144909 A TW108144909 A TW 108144909A TW 108144909 A TW108144909 A TW 108144909A TW I711859 B TWI711859 B TW I711859B
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Taiwan
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liquid crystal
crystal layer
incident light
display device
brightness
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TW108144909A
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Chinese (zh)
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TW202122883A (en
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鍾霈俊
吳易駿
郭毓峰
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和碩聯合科技股份有限公司
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Priority to TW108144909A priority Critical patent/TWI711859B/en
Priority to CN202010946159.8A priority patent/CN113031319A/en
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Publication of TWI711859B publication Critical patent/TWI711859B/en
Publication of TW202122883A publication Critical patent/TW202122883A/en

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    • 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
    • G02F1/1323—Arrangements for providing a switchable viewing angle
    • 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
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • 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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Dispersion Chemistry (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

A display device includes a backlight module, a privacy filter, a first liquid-crystal layer and a brightness enhancement film. The backlight module provides incident light. The privacy filter is disposed on the backlight module, and is configured to emit incident light perpendicular to a surface of the privacy filter, and the incident light emitted from the privacy filter has a first brightness. The first liquid-crystal layer is disposed on the privacy filter. The first liquid-crystal layer is configured to output incident light emitted from the privacy filter. The brightness enhancement film is disposed on the first liquid-crystal layer. The incident light emitted from the first liquid-crystal layer and output through the internal reflection of the brightness enhancement film has a second brightness. The second brightness is larger than the first brightness.

Description

顯示裝置Display device

本發明是有關於一種顯示裝置，且特別是有關於一種能夠提高亮度及節省電源消耗的顯示裝置。The present invention relates to a display device, and more particularly to a display device capable of improving brightness and saving power consumption.

一般的可攜式電子裝置，為了達到防窺的效果，其中一種方式是透過搭配外掛式防窺片來達成。此方式的結構配置是在可攜式電子裝置中另提供一層防窺片配置在背光模組及液晶層之間，如此控制顯示器輸出的光的角度以降低可視角度。In order to achieve the anti-peep effect of a general portable electronic device, one of the methods is to achieve it by matching an external peep-proof sheet. The structural configuration of this method is to provide another layer of privacy sheet between the backlight module and the liquid crystal layer in the portable electronic device, so as to control the angle of the light output by the display to reduce the viewing angle.

然而，透過另提供一層防窺片來達到防窺效果的方式，由於防窺片會大幅降低顯示器輸出的光的亮度，因而產生了使用者觀感不佳的問題。另一方面，若是手動提高顯示器的亮度，如此將會有額外產生電源功耗的問題。However, by providing another layer of anti-peeping sheet to achieve the anti-peeping effect, since the anti-peeping sheet will greatly reduce the brightness of the light output by the display, the problem of poor perception of the user arises. On the other hand, if the brightness of the display is manually increased, there will be additional power consumption problems.

本發明提供一種顯示裝置，能夠解決顯示器亮度不足以及手動提高顯示器的亮度會額外產生電源功耗的問題。The present invention provides a display device, which can solve the problem that the brightness of the display is insufficient and that the manual increase of the brightness of the display will cause additional power consumption.

本發明的一種顯示裝置包括一背光模組、一防窺片、一第一液晶層以及一增亮層。背光模組提供入射光。防窺片配置於背光模組上，用以射出垂直於防窺片表面方向的入射光且自防窺片射出的入射光具有一第一亮度。第一液晶層配置於防窺片上。第一液晶層用以輸出自防窺片射出的入射光。增亮層配置於第一液晶層上。自第一液晶層射出並通過增亮層的內部反射輸出的入射光具有一第二亮度。第二亮度大於第一亮度。A display device of the present invention includes a backlight module, a privacy sheet, a first liquid crystal layer and a brightness enhancement layer. The backlight module provides incident light. The privacy sheet is disposed on the backlight module and used for emitting incident light perpendicular to the surface of the privacy sheet and the incident light emitted from the privacy sheet has a first brightness. The first liquid crystal layer is configured on the privacy sheet. The first liquid crystal layer is used for outputting incident light emitted from the privacy sheet. The brightness enhancement layer is configured on the first liquid crystal layer. The incident light emitted from the first liquid crystal layer and output through the internal reflection of the brightness enhancement layer has a second brightness. The second brightness is greater than the first brightness.

在本發明的一實施例中，上述的顯示裝置包括第二液晶層。第二液晶層配置於增亮層上。第二液晶層用以輸出自增亮層射出的入射光。In an embodiment of the present invention, the above-mentioned display device includes a second liquid crystal layer. The second liquid crystal layer is disposed on the brightness enhancement layer. The second liquid crystal layer is used for outputting incident light emitted from the brightness enhancement layer.

在本發明的一實施例中，上述的顯示裝置包括液晶顯示模組。液晶顯示模組配置於第二液晶層上並用以輸出自第二液晶層射出的入射光。In an embodiment of the present invention, the above-mentioned display device includes a liquid crystal display module. The liquid crystal display module is disposed on the second liquid crystal layer and used for outputting incident light emitted from the second liquid crystal layer.

在本發明的一實施例中，上述的第一液晶層及第二液晶層為高分子分散型液晶層。In an embodiment of the present invention, the aforementioned first liquid crystal layer and second liquid crystal layer are polymer dispersed liquid crystal layers.

在本發明的一實施例中，上述當第一液晶層接受一預設外加電壓時，第一液晶層能夠使入射至第一液晶層的入射光以垂直於第一液晶層表面方向射出。In an embodiment of the present invention, when the first liquid crystal layer receives a predetermined applied voltage, the first liquid crystal layer can make the incident light incident on the first liquid crystal layer emit in a direction perpendicular to the surface of the first liquid crystal layer.

在本發明的一實施例中，上述當第一液晶層接受小於預設外加電壓時，第一液晶層將部分的入射至第一液晶層的入射光以垂直於第一液晶層表面方向射出。In an embodiment of the present invention, when the first liquid crystal layer receives an applied voltage smaller than the preset voltage, the first liquid crystal layer emits part of the incident light incident on the first liquid crystal layer in a direction perpendicular to the surface of the first liquid crystal layer.

在本發明的一實施例中，上述當第二液晶層接受一預設外加電壓時，第二液晶層能夠使入射至第二液晶層的入射光以垂直於第二液晶層表面方向射出。In an embodiment of the present invention, when the second liquid crystal layer receives a predetermined applied voltage, the second liquid crystal layer can make the incident light incident on the second liquid crystal layer emit in a direction perpendicular to the surface of the second liquid crystal layer.

在本發明的一實施例中，上述當第二液晶層接受電壓小於預設外加電壓時，第二液晶層將部分的入射至第二液晶層的入射光以垂直於第二液晶層表面方向射出。In an embodiment of the present invention, when the voltage received by the second liquid crystal layer is less than the preset applied voltage, the second liquid crystal layer emits part of the incident light incident on the second liquid crystal layer in a direction perpendicular to the surface of the second liquid crystal layer. .

在本發明的一實施例中，上述當第一液晶層或第二液晶層未接受預設外加電壓時，第一液晶層或第二液晶層將入射至第一液晶層及第二液晶層的入射光以散射方式射出。In an embodiment of the present invention, when the first liquid crystal layer or the second liquid crystal layer does not receive the preset applied voltage, the first liquid crystal layer or the second liquid crystal layer will be incident on the first liquid crystal layer and the second liquid crystal layer. The incident light is emitted in a scattered manner.

在本發明的一實施例中，上述的增亮層為菱鏡片。In an embodiment of the present invention, the above-mentioned brightness enhancement layer is a diamond lens.

基於上述，在本發明的顯示裝置中，能夠達到提高亮度以及節省電源消耗的功效。Based on the above, in the display device of the present invention, the effects of improving brightness and saving power consumption can be achieved.

為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

圖1是本發明一實施例的一種顯示裝置的示意圖。請參考圖1，本實施例的顯示裝置100包括一背光模組110、一防窺片120、一第一液晶層130以及一增亮層140。FIG. 1 is a schematic diagram of a display device according to an embodiment of the invention. Please refer to FIG. 1, the display device 100 of this embodiment includes a backlight module 110, a privacy sheet 120, a first liquid crystal layer 130 and a brightness enhancement layer 140.

具體而言，防窺片120配置於背光模組110上。第一液晶層130配置於防窺片120上。增亮層140配置於第一液晶層130上。換言之，防窺片120位於背光模組110及第一液晶層130之間。第一液晶層130位於防窺片120及增亮層140之間。Specifically, the privacy sheet 120 is disposed on the backlight module 110. The first liquid crystal layer 130 is disposed on the privacy sheet 120. The brightness enhancement layer 140 is disposed on the first liquid crystal layer 130. In other words, the privacy sheet 120 is located between the backlight module 110 and the first liquid crystal layer 130. The first liquid crystal layer 130 is located between the privacy sheet 120 and the brightness enhancement layer 140.

圖2是本發明一實施例的一種顯示裝置的示意圖。圖3是圖2的顯示裝置的第一液晶層及第二液晶層皆接受預設外加電壓的示意圖。圖4是圖2的顯示裝置的第一液晶層及第二液晶層皆未接受預設外加電壓的示意圖。為了清楚表示與便於說明，在圖3及圖4中以單方向的單個箭頭表現多個垂直於防窺片120表面方向的光，以多方向的不同箭頭表現發散光，並以多方向的不同數量的箭頭表現發散光的散射程度的改變。此外，為了簡潔說明，以下僅以圖2、圖3及圖4所示的內容來敘述，然圖式所示內容及以下的描述內容並非用以限制本發明。FIG. 2 is a schematic diagram of a display device according to an embodiment of the invention. 3 is a schematic diagram of both the first liquid crystal layer and the second liquid crystal layer of the display device of FIG. 2 receiving a preset applied voltage. FIG. 4 is a schematic diagram of the first liquid crystal layer and the second liquid crystal layer of the display device of FIG. 2 not receiving a preset applied voltage. For clarity and ease of explanation, in FIGS. 3 and 4, a single arrow in a single direction is used to represent a plurality of lights perpendicular to the surface of the privacy sheet 120, and different arrows in multiple directions are used to represent divergent light, and different in multiple directions. The number of arrows show changes in the degree of scattering of divergent light. In addition, for the sake of concise description, only the content shown in FIG. 2, FIG. 3, and FIG. 4 are described below, but the content shown in the drawings and the following description content are not intended to limit the present invention.

如圖2、圖3及圖4所示，顯示裝置可更包括一第二液晶層150以及一液晶顯示模組160。第二液晶層150配置於增亮層140上。液晶顯示模組160配置於第二液晶層150上。換言之，增亮層140位於第一液晶層130及第二液晶層150之間。第二液晶層150位於增亮層140及液晶顯示模組160之間。As shown in FIGS. 2, 3 and 4, the display device may further include a second liquid crystal layer 150 and a liquid crystal display module 160. The second liquid crystal layer 150 is disposed on the brightness enhancement layer 140. The liquid crystal display module 160 is disposed on the second liquid crystal layer 150. In other words, the brightness enhancement layer 140 is located between the first liquid crystal layer 130 and the second liquid crystal layer 150. The second liquid crystal layer 150 is located between the brightness enhancement layer 140 and the liquid crystal display module 160.

背光模組110提供入射光。防窺片120用以射出垂直於防窺片120表面方向的入射光，也可說用以射出高指向性的入射光。且自防窺片120射出的入射光具有一第一亮度。第一液晶層130用以輸出自防窺片120射出的入射光。增亮層140例如但不限於非0度角的菱鏡片(Brightness Enhancement Film，BEF)。自第一液晶層130射出的入射光通過增亮層140的內部反射輸出的入射光具有一第二亮度。第二亮度大於第一亮度。因此，透過增亮層140的配置，能夠提高亮度。另外，由於不用額外增加背光模組110的功率即可透過增亮層140提高亮度，故能夠節省電源消耗。The backlight module 110 provides incident light. The privacy sheet 120 is used to emit incident light in a direction perpendicular to the surface of the privacy sheet 120, which can also be said to be used to emit incident light with high directivity. In addition, the incident light emitted from the privacy sheet 120 has a first brightness. The first liquid crystal layer 130 is used for outputting incident light emitted from the privacy sheet 120. The brightness enhancement layer 140 is, for example, but not limited to, a non-zero angle diamond lens (Brightness Enhancement Film, BEF). The incident light emitted from the first liquid crystal layer 130 through the internal reflection of the brightness enhancement layer 140 has a second brightness. The second brightness is greater than the first brightness. Therefore, through the arrangement of the brightness enhancement layer 140, the brightness can be improved. In addition, since the brightness can be increased through the brightness enhancement layer 140 without additional power of the backlight module 110, power consumption can be saved.

另一方面，第二液晶層150用以輸出自增亮層140射出的入射光。液晶顯示模組160用以輸出自第二液晶層150射出的入射光。On the other hand, the second liquid crystal layer 150 is used to output incident light emitted from the brightness enhancement layer 140. The liquid crystal display module 160 is used for outputting incident light emitted from the second liquid crystal layer 150.

更進一步來說，第一液晶層130及第二液晶層150兩者皆例如但不限於高分子分散型液晶層。請參考圖2及圖3，在本實施例中，當第一液晶層130接受一預設外加電壓時，第一液晶層130能夠使入射至第一液晶層130的入射光以垂直於第一液晶層130表面方向射出。當第二液晶層150接受一預設外加電壓時，第二液晶層150能夠使入射至第二液晶層150的入射光以垂直於第二液晶層150表面方向射出。換句話說，當第一液晶層130及第二液晶層150各自接受預設外加電壓時，第一液晶層130、第二液晶層150及液晶顯示模組160皆射出垂直於防窺片120表面方向的光，由於液晶顯示模組160輸出的光為垂直於防窺片120表面方向的光，限制了顯示裝置100的可視角度，圖3所示狀態下的顯示裝置100具有較窄的可視角度。另外，由於液晶顯示模組160輸出的光已先行經過增亮層140增亮，故液晶顯示模組160輸出的光的亮度可被提高。再者，使用者並不需要另外手動增加背光模組110的功率來提高顯示裝置100的亮度，故可節省電源消耗。Furthermore, both the first liquid crystal layer 130 and the second liquid crystal layer 150 are for example, but not limited to, a polymer dispersed liquid crystal layer. 2 and 3, in this embodiment, when the first liquid crystal layer 130 receives a preset applied voltage, the first liquid crystal layer 130 can make the incident light incident on the first liquid crystal layer 130 perpendicular to the first The surface direction of the liquid crystal layer 130 is emitted. When the second liquid crystal layer 150 receives a predetermined applied voltage, the second liquid crystal layer 150 can make the incident light incident on the second liquid crystal layer 150 exit in a direction perpendicular to the surface of the second liquid crystal layer 150. In other words, when the first liquid crystal layer 130 and the second liquid crystal layer 150 each receive a predetermined applied voltage, the first liquid crystal layer 130, the second liquid crystal layer 150 and the liquid crystal display module 160 are all projected perpendicular to the surface of the privacy sheet 120 Directional light, since the light output by the liquid crystal display module 160 is perpendicular to the surface of the privacy sheet 120, the viewing angle of the display device 100 is limited. The display device 100 in the state shown in FIG. 3 has a narrow viewing angle . In addition, since the light output by the liquid crystal display module 160 has been brightened by the brightness enhancement layer 140 in advance, the brightness of the light output by the liquid crystal display module 160 can be increased. Furthermore, the user does not need to manually increase the power of the backlight module 110 to increase the brightness of the display device 100, so power consumption can be saved.

請參考圖2及圖4，當第一液晶層130未接受預設外加電壓時，第一液晶層130散射自防窺片120入射至第一液晶層130的入射光。當第二液晶層150未接受外加電壓時，第二液晶層150散射自增亮層140入射至第二液晶層150的入射光。換句話說，當第一液晶層130及第二液晶層150皆未接受外加電壓時，第一液晶層130及第二液晶層150皆散射入射至第一液晶層130及第二液晶層150的入射光，由於液晶顯示模組160輸出的光為經過第一液晶層130及第二液晶層150共兩次散射的光，故增加了顯示裝置100的可視角度，圖4所示狀態下的顯示裝置100具有較廣的可視角度。另外，由於液晶顯示模組160輸出的光已先行經過增亮層140增亮，故液晶顯示模組160輸出的光的亮度可被提高。再者，使用者並不需要另外手動增加背光模組110的功率來提高顯示裝置100的亮度，故可節省電源消耗。此外，透過在第一液晶層130及第二液晶層150的中間再隔離一層增亮層140，可增加第一液晶層130及第二液晶層150之間的距離，使得光的散射效果更加地顯著，以使顯示裝置100得到更大的可視角度。2 and 4, when the first liquid crystal layer 130 does not receive a predetermined applied voltage, the first liquid crystal layer 130 scatters the incident light from the privacy sheet 120 to the first liquid crystal layer 130. When the second liquid crystal layer 150 does not receive an external voltage, the second liquid crystal layer 150 scatters the incident light from the brightness enhancement layer 140 to the second liquid crystal layer 150. In other words, when the first liquid crystal layer 130 and the second liquid crystal layer 150 do not receive an external voltage, the first liquid crystal layer 130 and the second liquid crystal layer 150 are scattered and incident on the first liquid crystal layer 130 and the second liquid crystal layer 150. Incident light, since the light output by the liquid crystal display module 160 is light scattered twice through the first liquid crystal layer 130 and the second liquid crystal layer 150, the viewing angle of the display device 100 is increased. The display in the state shown in FIG. 4 The device 100 has a wide viewing angle. In addition, since the light output by the liquid crystal display module 160 has been brightened by the brightness enhancement layer 140 in advance, the brightness of the light output by the liquid crystal display module 160 can be increased. Furthermore, the user does not need to manually increase the power of the backlight module 110 to increase the brightness of the display device 100, so power consumption can be saved. In addition, by separating a layer of brightness enhancement layer 140 between the first liquid crystal layer 130 and the second liquid crystal layer 150, the distance between the first liquid crystal layer 130 and the second liquid crystal layer 150 can be increased, so that the light scattering effect is more enhanced. Significantly, so that the display device 100 can obtain a larger viewing angle.

簡言之，第一液晶層130及第二液晶層150被配置用以射出散射性的光或射出高指向性的光，以決定最終液晶顯示模組160射出的光為散射性的光或高指向性的光。當液晶顯示模組160輸出高指向性的光，顯示裝置100提供較窄的可視角度，可保護使用者的隱私。當液晶顯示模組160輸出散射性的光，顯示裝置100提供較廣的可視角度，可便於共享顯示畫面。In short, the first liquid crystal layer 130 and the second liquid crystal layer 150 are configured to emit scattered light or high-directivity light to determine that the final light emitted by the liquid crystal display module 160 is scattered light or high-directivity light. Directional light. When the liquid crystal display module 160 outputs high-directivity light, the display device 100 provides a narrow viewing angle, which can protect the privacy of the user. When the liquid crystal display module 160 outputs scattered light, the display device 100 provides a wider viewing angle, which can facilitate the sharing of display images.

圖5是本發明另一實施例的一種顯示裝置的示意圖，其中第一液晶層及第二液晶層皆未接受預設外加電壓。圖6是圖5的顯示裝置的第一液晶層接受預設外加電壓且第二液晶層接受小於預設外加電壓的示意圖。為了清楚表示與便於說明，在圖5及圖6中以單方向的單個箭頭表現垂直於防窺片220表面方向的光，以多方向的不同箭頭表現發散光，以箭頭長短的改變表現光的增減，並以多方向的不同數量的箭頭表現發散光的散射程度的改變。請參考圖5及圖6，在圖6的顯示裝置200中背光模組210及防窺片220的配置與作用方式相同於圖2的顯示裝置100中背光模組110及防窺片120的配置與作用方式，於此不再贅述。本實施例與前述實施例的差異在於，顯示裝置200的增亮層240例如但不限於0度角的菱鏡片。藉此，可降低增亮層240所輸出的高指向性的光的光量並增加發散性的光的光量，使得正視於液晶顯示模組260的輝度降低，而斜視於液晶顯示模組260的輝度變高，因此可應用在使用者需要斜視顯示裝置200的場合，例如但不限於應用在車載顯示裝置。FIG. 5 is a schematic diagram of a display device according to another embodiment of the present invention, in which neither the first liquid crystal layer nor the second liquid crystal layer receives a preset applied voltage. 6 is a schematic diagram of the first liquid crystal layer of the display device of FIG. 5 receiving a predetermined applied voltage and the second liquid crystal layer receiving a predetermined applied voltage less than the predetermined applied voltage. For clarity and convenience, in Figures 5 and 6, a single arrow in a single direction is used to represent the light perpendicular to the surface of the privacy filter 220, and different arrows in multiple directions are used to represent divergent light, and the length of the arrow is changed to represent the light. Increase or decrease, and show the change in the degree of scattering of divergent light with different numbers of arrows in multiple directions. Please refer to FIGS. 5 and 6, the configuration and function of the backlight module 210 and the privacy sheet 220 in the display device 200 of FIG. 6 are the same as the configuration of the backlight module 110 and the privacy sheet 120 in the display device 100 of FIG. And the mode of action will not be repeated here. The difference between this embodiment and the foregoing embodiments is that the brightness enhancement layer 240 of the display device 200 is, for example, but not limited to, a diamond lens with an angle of 0 degrees. As a result, the amount of high-directivity light output by the brightness enhancement layer 240 can be reduced and the amount of divergent light can be increased, so that the brightness of the liquid crystal display module 260 is reduced while the brightness of the liquid crystal display module 260 is obliquely viewed. Therefore, it can be applied to occasions where the user needs to squint the display device 200, such as, but not limited to, a vehicle display device.

當第一液晶層230及第二液晶層250各自接受一預設外加電壓時，第一液晶層230、第二液晶層250及液晶顯示模組260皆射出垂直於防窺片220表面方向的光。此預設外加電壓例如但不限於是第一液晶層230及第二液晶層250的額定電壓，能夠使第一液晶層230及第二液晶層250內部的液晶分子整齊排列，使光線往同一個方向通過。當第一液晶層230接受小於預設外加電壓(不足額定電壓)時，第一液晶層230內部的液晶分子無法完整地整齊排列，第一液晶層230將部分的入射至第一液晶層230的入射光以垂直於第一液晶層230表面方向射出。當第二液晶層250接受小於預設外加電壓(不足額定電壓)時，第二液晶層250內部的液晶分子無法完整地整齊排列，第二液晶層250將部分的入射至第二液晶層250的入射光以垂直於第二液晶層250表面方向射出，如此第二液晶層250可達到遮蔽增亮層240表面瑕疵的功效。When the first liquid crystal layer 230 and the second liquid crystal layer 250 each receive a predetermined applied voltage, the first liquid crystal layer 230, the second liquid crystal layer 250, and the liquid crystal display module 260 all emit light in a direction perpendicular to the surface of the privacy sheet 220. . The preset applied voltage is, for example, but not limited to, the rated voltages of the first liquid crystal layer 230 and the second liquid crystal layer 250, which can make the liquid crystal molecules in the first liquid crystal layer 230 and the second liquid crystal layer 250 line up neatly so that the light goes to the same The direction passed. When the first liquid crystal layer 230 receives less than the preset applied voltage (less than the rated voltage), the liquid crystal molecules inside the first liquid crystal layer 230 cannot be completely and neatly arranged, and the first liquid crystal layer 230 will partially incident on the first liquid crystal layer 230 The incident light is emitted in a direction perpendicular to the surface of the first liquid crystal layer 230. When the second liquid crystal layer 250 receives less than the preset applied voltage (less than the rated voltage), the liquid crystal molecules inside the second liquid crystal layer 250 cannot be completely and neatly arranged, and the second liquid crystal layer 250 will partially incident on the second liquid crystal layer 250 The incident light is emitted in a direction perpendicular to the surface of the second liquid crystal layer 250, so the second liquid crystal layer 250 can achieve the effect of shielding the surface defects of the brightness enhancement layer 240.

綜上所述，在本發明的顯示裝置中，背光模組提供入射光，防窺片用以射出垂直於防窺片表面方向的入射光且具有第一亮度，第一液晶層用以輸出自防窺片射出的入射光，自第一液晶層射出的入射光通過增亮層的內部反射輸出的入射光具有第二亮度，第二亮度大於第一亮度，第二液晶層用以輸出自增亮層射出的入射光，且液晶顯示模組用以輸出自第二液晶層射出的入射光，藉此能夠達到提高亮度以及節省電源消耗的功效。In summary, in the display device of the present invention, the backlight module provides incident light, the privacy sheet is used to emit incident light perpendicular to the surface of the privacy sheet and has a first brightness, and the first liquid crystal layer is used to output light from The incident light emitted by the privacy sheet, the incident light emitted from the first liquid crystal layer, and the incident light output by the internal reflection of the brightness enhancement layer have a second brightness, the second brightness is greater than the first brightness, and the second liquid crystal layer is used to output self-increasing The incident light emitted from the bright layer, and the liquid crystal display module is used to output the incident light emitted from the second liquid crystal layer, thereby achieving the effects of improving brightness and saving power consumption.

雖然本發明已以實施例揭露如上，然其並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明的精神和範圍內，當可作些許的更動與潤飾，故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

100、200:顯示裝置 110、210:背光模組 120、220:防窺片 130、230:第一液晶層 140、240:增亮層 150、250:第二液晶層 160、260:液晶顯示模組 100, 200: display device 110, 210: backlight module 120, 220: privacy film 130, 230: the first liquid crystal layer 140, 240: Brightness enhancement layer 150, 250: second liquid crystal layer 160, 260: LCD module

圖1是本發明一實施例的一種顯示裝置的示意圖。 圖2是本發明一實施例的一種顯示裝置的示意圖。 圖3是圖2的顯示裝置的第一液晶層及第二液晶層皆接受預設外加電壓的示意圖。 圖4是圖2的顯示裝置的第一液晶層及第二液晶層皆未接受預設外加電壓的示意圖。 圖5是本發明另一實施例的一種顯示裝置的示意圖，其中第一液晶層及第二液晶層皆未接受預設外加電壓。 圖6是圖5的顯示裝置的第一液晶層接受預設外加電壓且第二液晶層接受小於預設外加電壓的示意圖。 FIG. 1 is a schematic diagram of a display device according to an embodiment of the invention. FIG. 2 is a schematic diagram of a display device according to an embodiment of the invention. 3 is a schematic diagram of both the first liquid crystal layer and the second liquid crystal layer of the display device of FIG. 2 receiving a preset applied voltage. FIG. 4 is a schematic diagram of the first liquid crystal layer and the second liquid crystal layer of the display device of FIG. 2 not receiving a preset applied voltage. FIG. 5 is a schematic diagram of a display device according to another embodiment of the present invention, in which neither the first liquid crystal layer nor the second liquid crystal layer receives a preset applied voltage. 6 is a schematic diagram of the first liquid crystal layer of the display device of FIG. 5 receiving a predetermined applied voltage and the second liquid crystal layer receiving a predetermined applied voltage less than the predetermined applied voltage.

100:顯示裝置 100: display device

110:背光模組 110: Backlight module

120:防窺片 120: Privacy Filter

130:第一液晶層 130: the first liquid crystal layer

140:增亮層 140: Brightness enhancement layer

150:第二液晶層 150: second liquid crystal layer

160:液晶顯示模組 160: LCD module

Claims (9)

一種顯示裝置，包括：一背光模組，提供入射光；一防窺片，配置於該背光模組上，用以射出垂直於該防窺片表面方向的入射光，且自該防窺片射出的入射光具有一第一亮度；一第一液晶層，配置於該防窺片上，該第一液晶層用以輸出自該防窺片射出的入射光；以及一增亮層，配置於該第一液晶層上，自該第一液晶層射出並通過該增亮層的內部反射而輸出的入射光具有一第二亮度，其中該第二亮度大於該第一亮度，當該第一液晶層接受一預設外加電壓時，該第一液晶層能夠使入射至該第一液晶層的入射光以垂直於該第一液晶層表面方向射出，當該第一液晶層接受小於該預設外加電壓時，該第一液晶層將部分的入射至該第一液晶層的入射光以垂直於該第一液晶層表面方向射出。 A display device includes: a backlight module that provides incident light; and a privacy sheet disposed on the backlight module for emitting incident light perpendicular to the surface of the privacy sheet and emitted from the privacy sheet The incident light has a first brightness; a first liquid crystal layer is disposed on the privacy sheet, the first liquid crystal layer is used to output the incident light emitted from the privacy sheet; and a brightness enhancement layer is disposed on the second On a liquid crystal layer, incident light emitted from the first liquid crystal layer and output by the internal reflection of the brightness enhancement layer has a second brightness, wherein the second brightness is greater than the first brightness, and when the first liquid crystal layer receives When a predetermined external voltage is applied, the first liquid crystal layer can make the incident light incident on the first liquid crystal layer emit in a direction perpendicular to the surface of the first liquid crystal layer, and when the first liquid crystal layer receives less than the predetermined external voltage The first liquid crystal layer emits part of the incident light incident on the first liquid crystal layer in a direction perpendicular to the surface of the first liquid crystal layer. 如申請專利範圍第1項所述的顯示裝置，更包括：一第二液晶層，配置於該增亮層上，該第二液晶層用以輸出自該增亮層射出的入射光。 The display device described in item 1 of the scope of patent application further includes: a second liquid crystal layer disposed on the brightness enhancement layer, and the second liquid crystal layer is used for outputting incident light emitted from the brightness enhancement layer. 如申請專利範圍第2項所述的顯示裝置，更包括：一液晶顯示模組，配置於該第二液晶層上並用以輸出自該第二液晶層射出的入射光。 The display device described in item 2 of the scope of patent application further includes a liquid crystal display module disposed on the second liquid crystal layer and used for outputting incident light emitted from the second liquid crystal layer. 如申請專利範圍第2項所述的顯示裝置，其中該第一液晶層及該第二液晶層為高分子分散型液晶層。 According to the display device described in item 2 of the scope of patent application, the first liquid crystal layer and the second liquid crystal layer are polymer dispersed liquid crystal layers. 如申請專利範圍第2項所述的顯示裝置，其中當該第二液晶層接受一預設外加電壓時，該第二液晶層能夠使入射至該第二液晶層的入射光以垂直於該第二液晶層表面方向射出。 As for the display device described in item 2 of the scope of patent application, when the second liquid crystal layer receives a predetermined applied voltage, the second liquid crystal layer can make the incident light incident on the second liquid crystal layer perpendicular to the first liquid crystal layer. The surface direction of the liquid crystal layer is emitted. 如申請專利範圍第5項所述的顯示裝置，其中當該第二液晶層接受小於該預設外加電壓時，該第二液晶層將部分的入射至該第二液晶層的入射光以垂直於該第二液晶層表面方向射出。 For the display device described in item 5 of the scope of patent application, when the second liquid crystal layer receives an applied voltage less than the predetermined applied voltage, the second liquid crystal layer converts part of the incident light to the second liquid crystal layer perpendicular to The surface direction of the second liquid crystal layer is emitted. 如申請專利範圍第1項所述的顯示裝置，其中當該第一液晶層未接受該預設外加電壓時，該第一液晶層將入射至該第一液晶層的入射光以散射方式射出。 As for the display device described in claim 1, wherein when the first liquid crystal layer does not receive the predetermined applied voltage, the first liquid crystal layer emits incident light incident on the first liquid crystal layer in a scattering manner. 如申請專利範圍第5項所述的顯示裝置，其中當該第二液晶層未接受該預設外加電壓時，該第二液晶層將入射至該第二液晶層的入射光以散射方式射出。 According to the display device described in item 5 of the scope of patent application, when the second liquid crystal layer does not receive the predetermined applied voltage, the second liquid crystal layer emits incident light incident on the second liquid crystal layer in a scattering manner. 如申請專利範圍第1項所述的顯示裝置，其中該增亮層為菱鏡片。 In the display device described in item 1 of the scope of patent application, the brightness enhancement layer is a rhombohedral lens.
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