201003212 九、發明說明： 【發明所屬之技術領域】 尤其涉及一種可兼做鏡 本發明涉及一種液晶顯示幕 子之液晶顯示幕。 【先前技術】 液晶顯示幕因其具有低輕射性、輕薄短小及耗電低等 特點’故應用日漸廣泛’且隨著相關技術之成熟及創新， 其種類也日益繁多。 先前技術之液晶顯示幕已廣泛用於各種各樣電器中， 如液晶電視、手機等。然而所述液晶顯示幕—般都不呈有 鏡子之功能，導致具有液晶電視之家中還需另外設置一個 較大之梳妝鏡’以及在旅行過程中又要攜帶小型梳妝鏡來 整理儀容，便於社會交往。然而，在家中額外設置一個較 大梳妝鏡會佔用屋内空間，在旅行過程中攜帶小型梳妝鏡 會給旅行帶來額外之負擔。 【發明内容】 有鑒於此，有必要提供一種能兼做鏡子之液晶顯示幕。 一種液晶顯示幕，其沿出光方向依次包括：一背光板、 一下基板、一液晶及電極層、一上基板及一帶通濾光層。 該帶通濾光層透射紅、綠、藍三色光，而反射其他波長光 線0 所述液晶顯示幕在其液晶及電極層外設置一允許紅、 綠、藍三色光透射，而反射其他波長光線之帶通濾光層， 從而使得該液晶顯示幕在斷電時也可作為鏡子使用。達到 6 201003212 一物多用之目的，從而大大方便人們之生活。 【實施方式】 下面將結合附圖，對本發明作進一步之詳細說明。 請參閱圖i，為本發明第一實施方式提供之一種液晶 顯示幕100。所述液晶顯示幕100沿出光方向依次包括一 背光層10、一下基板20、一液晶及電極層3〇、一上基板 40、一彩色濾光片50、一帶通濾光層60及—觸控面板7〇。 所述背光層1〇用於為液晶顯示幕1〇〇提供背光，當背 光層10被點亮時，光線會依次經過所述下基板2〇、液晶 及電極層30、上基板40、彩色濾光片5〇、帶通濾光層6〇 及觸控面板70 ’此時液晶顯示幕1〇〇會顯示圖像。 所述液晶及電極層30位於下基板2〇與上基板4〇之 間，其包括複數正型浪晶分子（未標示）。通過改變液晶及 電極層30中之液晶之方向來控制背光之出射。 所述彩色濾光片50用於為液晶顯示幕1〇〇提供紅、 綠、藍三原色，以使得浪晶顯示幕100具有彩色顯示功能。 所述帶通濾光層60位於彩色濾光片50遠離背光層10 之一側’其包括一透明基板61及形成於所述透明基板61 上之帶通濾光膜62。所述帶通濾光層60也可僅包括一個 帶通濾光膜62，該帶通濾光臈62可直接鍍設在所述彩色 濾光片50遠離背光層10之表面。所述帶通濾光層60為 紅、藍、綠光帶通濾光層，對於紅光、藍光及綠光具有較 高之穿射率，而反射其他波長之光線。優選地’所述帶通 滤光層60對紅、藍、綠光透射率大於90%。採用該種帶通 7 201003212 濾光層60，可提高經過彩色濾光片5〇之背光之利用率。 本實施方式中，所述帶通濾光臈62由高低折射率材料交替 • 鍍制而成。所述高折射率材料之折射率範圍為2.1-2.5，所 . 述低折射率材料之折射率範圍為1.3-1.5。所述高折射率材 料可選自Ta205、Ti〇2、Ti3〇5及Nb205中〆種或幾種之 混合。所述低折射率材料可選自Si〇2。圖2為本實施方式 中之所述帶通濾光膜62之光譜圖。由於所述帶通濾光層 60反射除紅、藍、綠光外之其他波長之光線，因此，當該 背光層1〇未被點亮時，外部光線在穿過觸控面板7〇後會 被帶通濾光層60反射，此時所述液晶顯示幕1〇〇則可作為 鏡子使用。 所述觸控面板70用於為採用所述液晶顯示幕1〇〇之電 器或電子裝置長:供一種信號輸入方式。同時，由於所述觸 控面板70設於所述帶通濾光層6〇外侧，可防止所述帶通 濾光層60上之帶通濾光膜62被刮傷，而影響帶通濾光膜 62之性能。具體應用中，所述觸控面板7〇可通過程式設 計而作為手寫板使用，如此，使用者則可在觸控面板7〇上 寫字並顯示在液晶顯示幕100上。例如，對於家用之液晶 電視，採用上述液晶顯示幕1〇〇後，該液晶電視則可被當 作黑板使用。 請參閱圖3,為本發明第二實施方式提供之一種液晶 顯示幕200。所述液晶顯示幕2〇〇沿出光方向依次包括一 背光層210、一半穿透半反射層28〇、一彩色濾光片25〇、 一下基板220、一液晶及電極層23〇、一上基板24〇、一帶 8 201003212 通濾光層260及一觸控面板270。 所述帶通濾光層260與本發明第一實施方式中之帶通 滤光層60基本相同，所述帶通濾光層260包括一透明基板 261及一形成於所述透明基板261上之帶通濾光膜262。優 選地，所述濾光層260形成於所述透明基板261遠離背光 層210之表面，如此，當液晶顯示幕200作為鏡子使用時’ 可避免外部入射光線因為經過透明基板261而損耗。所述 帶通濾光層260也可僅包括一個帶通濾光膜262，該帶通 濾光膜262可直接鍍設在所述上透明基板240遠離背光層 210之表面上。 所述半穿透半反射層280包括複數反射區281與複數 透射區282，且該反射區281與透射區282交錯設置。反 射區281用來反射外界光線，從而使得液晶顯示幕200可 利用外部光線進行顯示，透射區282能夠透射背光，從而 使得液晶顯示幕200亦能夠利用背光進行顯示。優選地， 所述每一反射區281上分散設置有複數反射式奈米粒子， 以加強反射區281之反射性能，提高外部光線利用率。該 奈米反射粒子之大小範圍為2奈米到1〇〇奈米，優選為5 不米到20奈米。如此’所述液晶顯示幕200則既可利用外 4光線進行顯示’也可利用背光進行顯示。 所述液晶顯示幕在其液晶及電極層外設置一允許紅、 ^、藍三色光透射，而反射其他波長光線之帶通濾光層， 從而使彳寸該液晶顯示幕在斷電時也可作為鏡子使用。達到 物多用之目的，從而大大方便人們之生活。 9 201003212 綜上所述，本發明符合發明專利要件，爰依法提出專 利申請。惟，以上所述者僅為本發明之較佳實施方式，本 發明之範圍並不以上述實施方式為限，舉凡熟悉本案技藝 之人士援依本發明之精神所作之等效修飾或變化，皆應涵 蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1係本發明第一實施方式提供之一種液晶顯示幕之截面 示意圖。 圖2係圖1中液晶顯示幕中之半穿透半反射層上之半穿透 半反射膜之光譜圖。 圖3係本發明第二實施方式提供之一種液晶顯示幕之截面 示意圖。 【主要元件符號說明】 液晶顯不幕 100,200 背光層 10,210 下基板 20,220 液晶及電極層 30,230 上基板 40,240 彩色濾光片 50,250 帶通濾光層 60,260 觸控面板 70,270 半穿透半反射層 280 透明基板 61,261 帶通濾、光膜 62,262 反射區 281 透射區 282201003212 IX. Description of the invention: [Technical field to which the invention pertains] In particular, the invention relates to a liquid crystal display screen of a liquid crystal display screen. [Prior Art] Liquid crystal display screens have become increasingly popular due to their low light-emitting properties, light weight, shortness, and low power consumption. With the maturity and innovation of related technologies, their types are becoming more and more diverse. Prior art liquid crystal display screens have been widely used in various electrical appliances such as liquid crystal televisions, mobile phones, and the like. However, the liquid crystal display screen generally does not have the function of a mirror, which leads to the need to additionally set a larger vanity mirror in the home of the LCD TV, and to carry a small vanity mirror during the travel process to organize the appearance and facilitate the society. Communication. However, the extra size of a large vanity mirror at home can take up space inside the house, and carrying a small vanity mirror during travel can put an extra burden on travel. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a liquid crystal display screen that can also serve as a mirror. A liquid crystal display screen includes a backlight, a lower substrate, a liquid crystal and an electrode layer, an upper substrate and a band pass filter layer in sequence along the light exiting direction. The band pass filter layer transmits red, green and blue light, and reflects other wavelengths of light. The liquid crystal display screen is provided with a red, green and blue light transmission outside the liquid crystal and the electrode layer, and reflects other wavelengths of light. The band pass filter layer, so that the liquid crystal display screen can also be used as a mirror when the power is off. Achieve 6 201003212 A multi-purpose purpose, which greatly facilitates people's lives. [Embodiment] Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings. Please refer to FIG. 1 , which is a liquid crystal display screen 100 according to a first embodiment of the present invention. The liquid crystal display screen 100 includes a backlight layer 10, a lower substrate 20, a liquid crystal and an electrode layer 3A, an upper substrate 40, a color filter 50, a band pass filter layer 60, and a touch control layer. Panel 7〇. The backlight layer 1 is used to provide backlight for the liquid crystal display screen. When the backlight layer 10 is illuminated, the light passes through the lower substrate 2, the liquid crystal and electrode layer 30, the upper substrate 40, and the color filter. The light film 5 〇, the band pass filter layer 6 〇 and the touch panel 70 ′ will display an image at this time. The liquid crystal and electrode layer 30 is located between the lower substrate 2 and the upper substrate 4, and includes a plurality of positive-type sea crystal molecules (not shown). The exit of the backlight is controlled by changing the direction of the liquid crystal in the liquid crystal and electrode layer 30. The color filter 50 is used to provide three primary colors of red, green and blue for the liquid crystal display screen 1 to enable the display screen 100 to have a color display function. The band pass filter layer 60 is located on a side of the color filter 50 away from the backlight layer 10 and includes a transparent substrate 61 and a band pass filter film 62 formed on the transparent substrate 61. The band pass filter layer 60 may also include only one band pass filter 62, which may be directly plated on the surface of the color filter 50 away from the backlight layer 10. The band pass filter layer 60 is a red, blue, and green bandpass filter layer having a high transmittance for red, blue, and green light, and reflecting light of other wavelengths. Preferably, the bandpass filter layer 60 has a transmittance of red, blue, and green light of greater than 90%. By using the bandpass 7 201003212 filter layer 60, the utilization of the backlight passing through the color filter 5〇 can be improved. In the present embodiment, the band pass filter 62 is formed by alternately plating high and low refractive index materials. The high refractive index material has a refractive index ranging from 2.1 to 2.5, and the low refractive index material has a refractive index ranging from 1.3 to 1.5. The high refractive index material may be selected from the group consisting of Ta205, Ti〇2, Ti3〇5, and Nb205, or a mixture thereof. The low refractive index material may be selected from Si 〇 2 . Fig. 2 is a spectrum diagram of the band pass filter film 62 in the present embodiment. Since the band pass filter layer 60 reflects light of other wavelengths except red, blue, and green light, when the backlight layer 1 is not illuminated, the external light passes through the touch panel 7 It is reflected by the band pass filter layer 60, and the liquid crystal display screen 1 can be used as a mirror. The touch panel 70 is used for an electric device or an electronic device that adopts the liquid crystal display screen: for a signal input mode. At the same time, since the touch panel 70 is disposed outside the band pass filter layer 6 , the band pass filter film 62 on the band pass filter layer 60 can be prevented from being scratched, thereby affecting the band pass filter. The performance of film 62. In a specific application, the touch panel 7 can be used as a tablet by using a program design, so that the user can write on the touch panel 7A and display it on the liquid crystal display screen 100. For example, for a home LCD TV, after using the above liquid crystal display screen, the LCD TV can be used as a blackboard. Please refer to FIG. 3, which illustrates a liquid crystal display panel 200 according to a second embodiment of the present invention. The liquid crystal display screen 2 includes a backlight layer 210, a half-transparent semi-reflective layer 28A, a color filter 25A, a lower substrate 220, a liquid crystal and an electrode layer 23A, and an upper substrate in sequence along the light-emitting direction. 24", a belt 8 201003212 pass filter layer 260 and a touch panel 270. The band pass filter layer 260 is substantially the same as the band pass filter layer 60 in the first embodiment of the present invention. The band pass filter layer 260 includes a transparent substrate 261 and a transparent substrate 261 formed thereon. Bandpass filter 262. Preferably, the filter layer 260 is formed on the surface of the transparent substrate 261 away from the backlight layer 210. Thus, when the liquid crystal display panel 200 is used as a mirror, external incident light can be prevented from being lost due to passing through the transparent substrate 261. The band pass filter layer 260 may also include only one band pass filter film 262 that may be directly plated on the surface of the upper transparent substrate 240 away from the backlight layer 210. The transflective layer 280 includes a plurality of reflective regions 281 and a plurality of transmissive regions 282, and the reflective regions 281 are interleaved with the transmissive regions 282. The reflection area 281 is used to reflect external light, so that the liquid crystal display panel 200 can be displayed by external light, and the transmission area 282 can transmit the backlight, so that the liquid crystal display screen 200 can also be displayed by using the backlight. Preferably, a plurality of reflective nanoparticles are dispersedly disposed on each of the reflective regions 281 to enhance the reflective performance of the reflective region 281 and improve external light utilization. The nano reflective particles range in size from 2 nanometers to 1 nanometer, preferably from 5 to 20 nanometers. Thus, the liquid crystal display panel 200 can be displayed by using only external light rays, or can be displayed by using a backlight. The liquid crystal display screen is provided with a band pass filter layer for allowing light of three colors of red, ^, and blue to be transmitted outside the liquid crystal and the electrode layer, so that the liquid crystal display screen can be turned off when the liquid crystal display screen is powered off. Used as a mirror. Achieve the purpose of multi-use, which greatly facilitates people's lives. 9 201003212 In summary, the present invention complies with the patent requirements of the invention and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing a liquid crystal display panel according to a first embodiment of the present invention. Figure 2 is a spectrum diagram of a transflective film on a transflective layer in the liquid crystal display of Figure 1. Fig. 3 is a cross-sectional view showing a liquid crystal display panel according to a second embodiment of the present invention. [Main component symbol description] LCD display 100, 200 backlight layer 10, 210 lower substrate 20, 220 liquid crystal and electrode layer 30, 230 upper substrate 40, 240 color filter 50, 250 band pass filter layer 60, 260 touch panel 70, 270 transflective layer 280 transparent substrate 61, 261 Band pass filter, light film 62, 262 reflection area 281 transmission area 282