TWI386726B - Liquid crystal display and lighting method - Google Patents
Liquid crystal display and lighting method Download PDFInfo
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Description
本發明是有關於一種液晶顯示器及發光方法，且特別是有關於一種可發出綠色光的液晶顯示器及發光方法。The present invention relates to a liquid crystal display and a light emitting method, and more particularly to a liquid crystal display capable of emitting green light and a light emitting method.
隨著顯示科技之發展，液晶顯示裝置之應用係越來越普遍。液晶顯示裝置通常係利用背光源及彩色濾光片相互配合來顯示全彩之畫面。背光源可為冷陰極螢光燈管(Cold Cathode Fluorescent Lamp,CCFL)或發光二極體(Light Emitting Diode,LED)。由於發光二極體具有體積小、低污染及省電之優點，因此，發光二極體受到業界之青睞。With the development of display technology, the application of liquid crystal display devices is becoming more and more popular. A liquid crystal display device usually uses a backlight and a color filter to cooperate with each other to display a full-color picture. The backlight can be a Cold Cathode Fluorescent Lamp (CCFL) or a Light Emitting Diode (LED). Because the light-emitting diode has the advantages of small size, low pollution and power saving, the light-emitting diode is favored by the industry.
以發光二極體作為液晶顯示裝置之背光源來舉例說明。發光二極體所發出之顏色光，例如是白光，係通過彩色濾光片來改變其之發光頻譜，使得液晶顯示裝置可顯示不同顏色之畫面。因此，液晶顯示裝置之色彩表現往往係取決於發光二極體之發光頻譜與彩色濾光片之穿透頻譜。A light-emitting diode is used as a backlight of a liquid crystal display device as an example. The color light emitted by the light-emitting diode, for example, white light, is changed by a color filter to change the light-emitting spectrum thereof, so that the liquid crystal display device can display pictures of different colors. Therefore, the color performance of the liquid crystal display device often depends on the light-emitting spectrum of the light-emitting diode and the transmission spectrum of the color filter.
然而，在低成本的考量下，現有之低價發光二極體在配合彩色濾光片時，液晶顯示裝置所發出之綠色光往往有飽和度不足的情況，使得液晶顯示裝置之整體的色彩表現不佳。因此，如何在低成本之考量下，選用適當的發光二極體及彩色濾光片，以提升液晶顯示裝置之畫面的色彩表現，乃為業界努力之課題之一。However, under the consideration of low cost, when the existing low-cost light-emitting diode is matched with the color filter, the green light emitted by the liquid crystal display device tends to have insufficient saturation, so that the overall color performance of the liquid crystal display device is achieved. Not good. Therefore, how to improve the color performance of the liquid crystal display device by selecting appropriate light-emitting diodes and color filters under low cost considerations is one of the projects of the industry.
本發明係有關於一種液晶顯示器及發光方法，其藉由白光與彩色濾光片之相互配合來提升綠色光之飽和度，使得根據本發明之液晶顯示器可具有良好的色彩表現。The invention relates to a liquid crystal display and a light-emitting method, which enhance the saturation of green light by the interaction of white light and color filter, so that the liquid crystal display according to the invention can have good color performance.
根據本發明之一實施例，提出一種液晶顯示器，包括背光源及液晶顯示面板。背光源用以發出白光。白光之歸一化(normalized)之發光頻譜具有第一峰值(peak)及第二峰值。第一峰值係實質上等於1。對應於第一峰值之波長係小於對應於第二峰值之波長，且第二峰值之半高寬小於100奈米。液晶顯示面板設置於背光源之一側，且具有彩色濾光片。彩色濾光片之一部分係用以過濾白光並發出綠色光。用以發出綠色光之部分之彩色濾光片之穿透頻譜與白光之歸一化之發光頻譜相交於第一交會點及第二交會點。對應於第一交會點之波長與對應於第二交會點之波長的差值係小於127奈米。According to an embodiment of the present invention, a liquid crystal display including a backlight and a liquid crystal display panel is provided. The backlight is used to emit white light. The normalized luminescence spectrum of white light has a first peak and a second peak. The first peak is substantially equal to one. The wavelength corresponding to the first peak is less than the wavelength corresponding to the second peak, and the half-height of the second peak is less than 100 nm. The liquid crystal display panel is disposed on one side of the backlight and has a color filter. One part of the color filter is used to filter white light and emit green light. The transmission spectrum of the color filter for emitting green light is intersected with the normalized illumination spectrum of white light at the first intersection point and the second intersection point. The difference between the wavelength corresponding to the first intersection point and the wavelength corresponding to the second intersection point is less than 127 nm.
根據本發明之另一實施例，提出一種發光方法，包括以下步驟。首先，產生白光。白光之歸一化之發光頻譜具有第一峰值及第二峰值。第一峰值係實質上等於1。對應於第一峰值之波長係小於對應於第二峰值之波長，且第二峰值之半高寬小於100奈米。接著，利用液晶顯示面板之彩色濾光片之一部分過濾白光並發出綠色光。發出綠色光之部分之彩色濾光片之穿透頻譜與白光之歸一化之發光頻譜相交於第一交會點及第二交會點。對應於第一交會點之波長與對應於第二交會點之波長的差值係小於127奈 米。According to another embodiment of the present invention, a method of illuminating is provided, comprising the following steps. First, white light is produced. The normalized luminescence spectrum of white light has a first peak and a second peak. The first peak is substantially equal to one. The wavelength corresponding to the first peak is less than the wavelength corresponding to the second peak, and the half-height of the second peak is less than 100 nm. Next, a portion of the color filter of the liquid crystal display panel is used to partially filter the white light and emit green light. The transmission spectrum of the color filter that emits the green light intersects the normalized illumination spectrum of the white light at the first intersection point and the second intersection point. The difference between the wavelength corresponding to the first intersection point and the wavelength corresponding to the second intersection point is less than 127 Nai Meter.
為讓本發明之上述內容能更明顯易懂，下文特舉較佳實施例，並配合所附圖式，作詳細說明如下：In order to make the above-mentioned contents of the present invention more comprehensible, the preferred embodiments are described below, and the detailed description is as follows:
本發明之一實施例所提出之液晶顯示器，包括背光源及液晶顯示面板。背光源用以發出白光。白光之歸一化之發光頻譜具有第一峰值及第二峰值。第一峰值係實質上等於1。對應於第一峰值之波長係小於對應於第二峰值之波長，且第二峰值之半高寬小於100奈米。此處之半高寬意指具有第二峰值之波形於其1/2第二峰值處所對應之兩個波長的差值。液晶顯示面板設置於背光源之一側，且具有彩色濾光片。彩色濾光片之一部分係用以過濾白光並發出綠色光。用以發出綠色光之濾光片的穿透頻譜與白光歸一化後之發光頻譜相交於第一交會點及第二交會點。對應於第一交會點之波長與對應於第二交會點之波長的差值係小於127奈米。A liquid crystal display according to an embodiment of the present invention includes a backlight and a liquid crystal display panel. The backlight is used to emit white light. The normalized luminescence spectrum of white light has a first peak and a second peak. The first peak is substantially equal to one. The wavelength corresponding to the first peak is less than the wavelength corresponding to the second peak, and the half-height of the second peak is less than 100 nm. Here, the full width at half maximum means the difference between the two wavelengths corresponding to the waveform having the second peak at the second peak of 1/2 thereof. The liquid crystal display panel is disposed on one side of the backlight and has a color filter. One part of the color filter is used to filter white light and emit green light. The transmission spectrum of the filter for emitting green light intersects the white light normalized illumination spectrum at the first intersection point and the second intersection point. The difference between the wavelength corresponding to the first intersection point and the wavelength corresponding to the second intersection point is less than 127 nm.
請參照第1圖，其繪示根據本發明一較佳實施例之液晶顯示器之示意圖。液晶顯示器200包括背光源210及液晶顯示面板230。液晶顯示面板230設置於背光源210之一側。背光源210例如是包括數個發光二極體211，用以發出白光W。Please refer to FIG. 1 , which is a schematic diagram of a liquid crystal display according to a preferred embodiment of the present invention. The liquid crystal display 200 includes a backlight 210 and a liquid crystal display panel 230. The liquid crystal display panel 230 is disposed on one side of the backlight 210. The backlight 210 includes, for example, a plurality of light emitting diodes 211 for emitting white light W.
液晶顯示面板230具有上基板230a、下基板230b、絕緣層232、配向膜233a及233b、畫素電極234、保護層 235、液晶層236、共同電極237、薄膜電晶體239及彩色濾光片231。薄膜電晶體239之閘極(未標號)、絕緣層232、薄膜電極體239之主動層(未標號)、汲極(未標號)及源極(未標號)、保護層235、畫素電極234及配向膜233b係依序設置於下基板233b上。畫素電極234係電性耦接於薄膜電晶體239之源極。彩色濾光片231、共同電極237及配向膜233a係依序設置於上基板230a上。液晶層236係密封於上基板230a與下基板230b之間。The liquid crystal display panel 230 has an upper substrate 230a, a lower substrate 230b, an insulating layer 232, alignment films 233a and 233b, a pixel electrode 234, and a protective layer. 235, a liquid crystal layer 236, a common electrode 237, a thin film transistor 239, and a color filter 231. The gate (not labeled) of the thin film transistor 239, the insulating layer 232, the active layer (not labeled) of the thin film electrode body 239, the drain (not labeled) and the source (not labeled), the protective layer 235, and the pixel electrode 234 The alignment film 233b is sequentially disposed on the lower substrate 233b. The pixel electrode 234 is electrically coupled to the source of the thin film transistor 239. The color filter 231, the common electrode 237, and the alignment film 233a are sequentially disposed on the upper substrate 230a. The liquid crystal layer 236 is sealed between the upper substrate 230a and the lower substrate 230b.
於本實施例中，彩色濾光片231具有黑色矩陣BM、紅色濾光層231R、藍色濾光層231B及綠色濾光層231G。當背光源210之發光二極體211所發出的白光W通過液晶顯示面板230時，紅色濾光層231R、藍色濾光層231B及綠色濾光層231G係過濾白光W並分別發出紅色光R、藍色光B及綠色光G。In the present embodiment, the color filter 231 has a black matrix BM, a red filter layer 231R, a blue filter layer 231B, and a green filter layer 231G. When the white light W emitted from the light-emitting diode 211 of the backlight 210 passes through the liquid crystal display panel 230, the red filter layer 231R, the blue filter layer 231B, and the green filter layer 231G filter the white light W and emit red light respectively. , blue light B and green light G.
請同時參照第2圖，其繪示第1圖中之背光源之發光頻譜及綠色濾光層之穿透頻譜之示意圖。第2圖中之左縱座標、右縱座標及橫座標分別表示歸一化之光強度、單位光強度(cd/單位)及波長(nm)。右縱座標上之數值y1~y12分別表示y1~y12個單位之光強度。白光W之歸一化之發光頻譜係以虛線L1表示，且對應於左縱座標。用以發出綠色光G之部分之彩色濾光片231，也就是綠色濾光層231G，的穿透頻譜係以實線L2表示，且對應於右縱座標。Please refer to FIG. 2 at the same time, which shows a schematic diagram of the illumination spectrum of the backlight and the penetration spectrum of the green filter layer in FIG. 1 . The left ordinate, the right ordinate, and the abscissa in Fig. 2 represent the normalized light intensity, unit light intensity (cd/unit), and wavelength (nm), respectively. The values y1 to y12 on the right ordinate indicate the light intensity of y1 to y12 units, respectively. The normalized luminescence spectrum of white light W is indicated by the dashed line L1 and corresponds to the left ordinate. The color filter 231 for emitting a portion of the green light G, that is, the green filter layer 231G, has a penetration spectrum indicated by a solid line L2 and corresponds to a right ordinate.
本實施例之白光W例如是由數個藍色發光二極體發出藍色光來激發設置於其上之螢光物質而產生。如第2圖 所示，白光W之歸一化之發光頻譜L1具有第一峰值P1及第二峰值P2，且第一峰值P1係實質上等於1。對應於第一峰值P1之波長wP1係小於對應於第二峰值P2之波長wP2，且第二峰值P2之半高寬FWHM小於100奈米。The white light W of the present embodiment is generated, for example, by emitting blue light from a plurality of blue light-emitting diodes to excite the fluorescent material disposed thereon. As shown in Figure 2 As shown, the normalized luminescence spectrum L1 of white light W has a first peak P1 and a second peak P2, and the first peak P1 is substantially equal to one. The wavelength wP1 corresponding to the first peak P1 is smaller than the wavelength wP2 corresponding to the second peak P2, and the half-height width FWHM of the second peak P2 is less than 100 nm.
用以發出綠色光G之部分之彩色濾光片231，也就是綠色濾光層231G，之穿透頻譜L2與白光W之歸一化之發光頻譜L1係相交於第一交會點I1及第二交會點I2。於本實施例中，對應於第一交會點I1之波長wI1與對應於第二交會點I2之波長wI2的差值D係小於127奈米。如此一來，綠色光G之色彩表現係具有較佳的飽和度。The color filter 231 for emitting a portion of the green light G, that is, the green filter layer 231G, the normalized light-emitting spectrum L1 of the penetration spectrum L2 and the white light W intersects at the first intersection point I1 and the second Intersection point I2. In the present embodiment, the difference D between the wavelength wI1 corresponding to the first intersection point I1 and the wavelength wI2 corresponding to the second intersection point I2 is less than 127 nm. As a result, the color performance of the green light G has better saturation.
與未選擇發出綠色光之彩色濾光片的穿透頻譜與白光歸一化後之發光頻譜的兩個交會點之間距的情況相較，本實施例之液晶顯示器200所發出之綠色光G具有較佳的飽和度，且可避免綠色光G之顏色產生偏差之情況，使得液晶顯示器200具有良好的色彩表現。Compared with the case where the penetration spectrum of the color filter that does not emit green light is selected and the distance between the two intersections of the white light normalized emission spectrum, the green light G emitted by the liquid crystal display 200 of the present embodiment has The saturation is better, and the deviation of the color of the green light G can be avoided, so that the liquid crystal display 200 has good color performance.
於本實施例中，第1圖中之背光源210係以直下式背光源為例做說明，但不以此為限。此技術領域中具有通常知識者應明瞭，只要是可提供白光至液晶顯示面板230中之背光源，例如是側光式之背光源，皆可應用於本實施例中。In the embodiment, the backlight 210 in FIG. 1 is described by taking a direct type backlight as an example, but is not limited thereto. It should be apparent to those skilled in the art that any backlight that can provide white light to the liquid crystal display panel 230, such as an edge-lit backlight, can be used in this embodiment.
茲將本實施例之液晶顯示器200進一步說明如下。較佳地，如第2圖所示之白光W之歸一化之發光頻譜L1的第一峰值P1係大於第二峰值P2，且對應於第二峰值P2之波長wP2大於500奈米。再者，為了具有更富飽和度之 綠色光來提升液晶顯示器200之色彩表現，本實施例中之波長wI1與波長wI2的差值D的範圍係可為90至127奈米，但並不以此為限。只要白光之歸一化之發光頻譜與用以發出綠色光之部分之彩色濾光片在相互配合下，使得對應於第一交會點之波長與對應於第二交會點之波長的差值係小於127奈米，皆可應用於本實施例中。The liquid crystal display 200 of the present embodiment will be further described below. Preferably, the first peak P1 of the normalized light-emitting spectrum L1 of the white light W as shown in FIG. 2 is larger than the second peak P2, and the wavelength wP2 corresponding to the second peak P2 is greater than 500 nm. Furthermore, in order to have more saturation The green light is used to enhance the color performance of the liquid crystal display 200. The difference D between the wavelength wI1 and the wavelength wI2 in this embodiment may range from 90 to 127 nm, but is not limited thereto. As long as the normalized light spectrum of the white light and the color filter for emitting the green light are coordinated, the difference between the wavelength corresponding to the first intersection and the wavelength corresponding to the second intersection is less than 127 nm can be applied to this embodiment.
如第1圖所示，本實施例之彩色濾光片231包括紅色濾光層231R、藍色濾光層231B及綠色濾光層231G，且綠色濾光層231G係用以過濾白光W以發出綠色光G。然而，本實施例並不以利用具有紅色濾光層、藍色濾光層及綠色濾光層之彩色濾光片為限。具有其他可過濾白光以發出兩種以上之顏色光來混合出綠色光的彩色濾光片亦可應用於本實施例中。以下將舉例說明。當然，此技術領域中具有通常知識者應明瞭，無論係利用任何數量之顏色光來混合出綠色光之彩色濾光片皆可應用於本實施例中。As shown in FIG. 1 , the color filter 231 of the present embodiment includes a red filter layer 231R, a blue filter layer 231B, and a green filter layer 231G, and the green filter layer 231G is used to filter the white light W to emit Green light G. However, this embodiment is not limited to the use of a color filter having a red filter layer, a blue filter layer, and a green filter layer. A color filter having other white light that can filter white light to emit two or more colors of light to mix green light can also be applied to the present embodiment. The following will be illustrated. Of course, it will be apparent to those of ordinary skill in the art that color filters that utilize any amount of color light to mix green light can be used in this embodiment.
請參照第3圖，其繪示另一種液晶顯示器之示意圖。液晶顯示器200’之彩色濾光片231’例如是包括第一顏色濾光層231a’、第二顏色濾光層231b’、紅色濾光層231R’及藍色濾光層231B’。第一顏色濾光層231a’之顏色例如是黃色，且第二顏色濾光層231b’之顏色例如是青色。第一顏色濾光層231a’及第二顏色濾光層231b’係過濾白光W以發出綠色光G’，且紅色濾光層231R’及藍色濾光層231B’係過濾白光W以分別發出紅色光R’及藍色光B’。Please refer to FIG. 3, which illustrates a schematic diagram of another liquid crystal display. The color filter 231' of the liquid crystal display 200' includes, for example, a first color filter layer 231a', a second color filter layer 231b', a red filter layer 231R', and a blue filter layer 231B'. The color of the first color filter layer 231a' is, for example, yellow, and the color of the second color filter layer 231b' is, for example, cyan. The first color filter layer 231a' and the second color filter layer 231b' filter the white light W to emit green light G', and the red filter layer 231R' and the blue filter layer 231B' filter the white light W to respectively emit Red light R' and blue light B'.
第一顏色濾光層231a’與第二顏色濾光層231b’之等 效穿透頻譜與白光W之歸一化之發光頻譜係相交於第一交會點與第二交會點，使得對應於第一交會點之波長與對應於第二交會點之波長的差值係小於127奈米。因此，液晶顯示器200’亦可用以避免綠色光G’之顏色產生偏差的情況。如此，液晶顯示器200’之綠色光G’係具良好的飽和度，使得液晶顯示器200’之色彩表現提升。當然，此處之第一顏色濾光層之顏色及第二顏色濾光層之顏色僅為一例子，並非用以限定本發明。First color filter layer 231a' and second color filter layer 231b' The normalized illuminating spectrum of the effective penetration spectrum and the white light W intersect at the first intersection point and the second intersection point such that the difference between the wavelength corresponding to the first intersection point and the wavelength corresponding to the second intersection point is less than 127 nm. Therefore, the liquid crystal display 200' can also be used to avoid a deviation in the color of the green light G'. Thus, the green light G' of the liquid crystal display 200' has good saturation, so that the color performance of the liquid crystal display 200' is improved. Of course, the color of the first color filter layer and the color of the second color filter layer are merely examples, and are not intended to limit the present invention.
請參照第4圖，其繪示根據本發明之一較佳實施例之發光方法流程圖。第4圖中之發光方法係利用第1圖中之液晶顯示器200來說明。然而，此技術領域中具有通常知識者應明瞭，發光方法並不限定於第4圖中之步驟及步驟之順序，且亦無限定於僅可利用第1圖中之液晶顯示器200來執行。Referring to FIG. 4, a flow chart of a method of illuminating according to a preferred embodiment of the present invention is shown. The light-emitting method in Fig. 4 is explained using the liquid crystal display 200 in Fig. 1 . However, it should be understood by those of ordinary skill in the art that the method of illuminating is not limited to the order of steps and steps in FIG. 4, and is not limited to being performed only by the liquid crystal display 200 of FIG.
如第4圖所示，發光方法包括以下之步驟。首先，於步驟501中，利用第1圖中之背光源210來產生白光W。如第2圖所示，白光W之歸一化之發光頻譜L1具有第一峰值P1及第二峰值P2，且第一峰值P1係實質上等於1。對應於第一峰值P1之波長wP1係小於對應於第二峰值P2之波長wP2，且第二峰值P2之半高寬FWHM小於100奈米。As shown in Fig. 4, the light-emitting method includes the following steps. First, in step 501, the white light W is generated by the backlight 210 in FIG. As shown in FIG. 2, the normalized light-emission spectrum L1 of the white light W has a first peak P1 and a second peak P2, and the first peak P1 is substantially equal to 1. The wavelength wP1 corresponding to the first peak P1 is smaller than the wavelength wP2 corresponding to the second peak P2, and the half-height width FWHM of the second peak P2 is less than 100 nm.
接著，於步驟503中，利用第1圖中之液晶顯示面板230之彩色濾光片231之部分，例如是其之綠色濾光層231G，來過濾白光W並發出綠色光G。發出綠色光G之 綠色濾光層231G之穿透頻譜L2與白光W之歸一化之發光頻譜L1相交於第一交會點I1及第二交會點I2。由於對應於第一交會點I1之波長wI1與對應於第二交會點I2之波長wI2的差值係小於127奈米，因此，綠色光G係具有良好的飽和度。Next, in step 503, the portion of the color filter 231 of the liquid crystal display panel 230 in Fig. 1, for example, the green filter layer 231G thereof, is used to filter the white light W and emit green light G. Glow green light G The normalized light-emitting spectrum L1 of the green filter layer 231G intersects the normalized light-emitting spectrum L1 of the white light W at the first intersection point I1 and the second intersection point I2. Since the difference between the wavelength wI1 corresponding to the first intersection point I1 and the wavelength wI2 corresponding to the second intersection point I2 is less than 127 nm, the green light G has good saturation.
當然，第4圖中之發光方法亦可利用第3圖中之液晶顯示器200’來執行各個步驟，且於第4圖中之步驟503係利用液晶顯示面板230’之彩色濾光片231’的第一顏色濾光層231a’及第二顏色濾光層231b’來過濾白光W以發出綠色光G’。第一顏色濾光層231a’與第二顏色濾光層231b’之等效穿透頻譜與白光W之歸一化之發光頻譜係相交於第一交會點與第二交會點，使得對應於第一交會點之波長與對應於第二交會點之波長的差值係小於127奈米。如此，綠色光G’係具有較佳的飽和度。此處之第一顏色濾光層231a’之顏色例如為黃色，且第二顏色濾光層231b’之顏色例如為青色。Of course, the light-emitting method in FIG. 4 can also perform the steps using the liquid crystal display 200' in FIG. 3, and the step 503 in FIG. 4 utilizes the color filter 231' of the liquid crystal display panel 230'. The first color filter layer 231a' and the second color filter layer 231b' filter the white light W to emit green light G'. The equivalent transmission spectrum of the first color filter layer 231a' and the second color filter layer 231b' intersects with the normalized luminescence spectrum of the white light W at the first intersection point and the second intersection point, so that the corresponding The difference between the wavelength of one intersection point and the wavelength corresponding to the second intersection point is less than 127 nm. Thus, the green light G' has a better saturation. Here, the color of the first color filter layer 231a' is, for example, yellow, and the color of the second color filter layer 231b' is, for example, cyan.
另外，較佳地，步驟501中所形成之白光W的歸一化之發光頻譜L1的第一峰值P1係大於第二峰值P2，且對應於第二峰值P2之波長wP2係大於500奈米。再者，於本實施例中，若欲進一步提高第1圖中之綠色光G之飽和度，亦可藉由限定對應於第一交會點之波長與對應於第二交會點之波長的差值，例如是選擇兩個交會點所分別對應之波長的差值之範圍為90至127奈米，的範圍來達成。然而，對應於第一交會點之波長與對應於第二交會點之波 長的差值的範圍並不以此為限。In addition, preferably, the first peak P1 of the normalized luminescence spectrum L1 of the white light W formed in step 501 is greater than the second peak P2, and the wavelength wP2 corresponding to the second peak P2 is greater than 500 nm. Furthermore, in this embodiment, if the saturation of the green light G in FIG. 1 is further improved, the difference between the wavelength corresponding to the first intersection point and the wavelength corresponding to the second intersection point may also be defined. For example, the range in which the difference between the wavelengths corresponding to the two intersection points is selected is in the range of 90 to 127 nm. However, the wavelength corresponding to the first intersection point and the wave corresponding to the second intersection point The range of long differences is not limited to this.
本發明上述實施例所揭露之液晶顯示器及發光方法，其規範背光源之發光頻譜與用以發出綠色光之部分的彩色濾光片之穿透頻譜，使得背光源之發光頻譜與該部分之彩色濾光片之穿透頻譜之兩個交會點所分別對應之波長的差值係小於127奈米。如此，根據本實施例所發出之綠色光係具有良好的飽和度，使得本實施例之液晶顯示器可具有良好的色彩表現。The liquid crystal display and the light-emitting method disclosed in the above embodiments of the present invention, which modulate the light-emitting spectrum of the backlight and the transmission spectrum of the color filter for emitting the green light, so that the light-emitting spectrum of the backlight and the color of the portion The difference between the wavelengths of the two intersections of the filter's transmission spectrum is less than 127 nm. Thus, the green light emitted according to the present embodiment has good saturation, so that the liquid crystal display of the embodiment can have good color performance.
綜上所述，雖然本發明已以較佳實施例揭露如上，然其並非用以限定本發明。本發明所屬技術領域中具有通常知識者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾。因此，本發明之保護範圍當視後附之申請專利範圍所界定者為準。In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.
200、200’‧‧‧液晶顯示器200, 200'‧‧‧ liquid crystal display
210‧‧‧背光源210‧‧‧Backlight
230、230’‧‧‧液晶顯示面板230, 230'‧‧‧ LCD panel
230a‧‧‧上基板230a‧‧‧Upper substrate
230b‧‧‧下基板230b‧‧‧lower substrate
231、231’‧‧‧彩色濾光片231, 231'‧‧‧ color filters
231a’‧‧‧第一顏色濾光層231a’‧‧‧First color filter
231B、231B’‧‧‧藍色濾光層231B, 231B'‧‧‧ blue filter layer
231b’‧‧‧第二顏色濾光層231b’‧‧‧Second color filter
231G‧‧‧綠色濾光層231G‧‧‧Green filter layer
231R、231R’‧‧‧紅色濾光層231R, 231R'‧‧‧ red filter layer
232‧‧‧絕緣層232‧‧‧Insulation
233a、233b‧‧‧配向膜233a, 233b‧‧‧ alignment film
234‧‧‧畫素電極234‧‧‧ pixel electrodes
235‧‧‧保護層235‧‧ ‧ protective layer
236‧‧‧液晶層236‧‧‧Liquid layer
237‧‧‧共同電極237‧‧‧Common electrode
239‧‧‧薄膜電晶體239‧‧‧film transistor
B、B’‧‧‧藍色光B, B’‧‧‧Blue light
D‧‧‧差值D‧‧‧Difference
FWHM‧‧‧半高寬FWHM‧‧‧Half width
G、G’‧‧‧綠色光G, G’‧‧‧ Green Light
11‧‧‧第一交會點11‧‧‧First meeting point
12‧‧‧第二交會點12‧‧‧Second meeting point
L1‧‧‧白光之歸一化之發光頻譜The normalized luminescence spectrum of L1‧‧‧ white light
L2‧‧‧綠色濾光層之穿透頻譜L2‧‧‧Green filter layer penetration spectrum
P1‧‧‧第一峰值P1‧‧‧ first peak
P2‧‧‧第二峰值P2‧‧‧ second peak
R、R’‧‧‧紅色光R, R’‧‧‧ red light
W‧‧‧白色光W‧‧‧White light
wI1、wI2、wP1、wP2‧‧‧波長wI1, wI2, wP1, wP2‧‧‧ wavelength
第1圖繪示根據本發明一較佳實施例之液晶顯示器之示意圖。FIG. 1 is a schematic view of a liquid crystal display according to a preferred embodiment of the present invention.
第2圖繪示第1圖中之背光源之發光頻譜及綠色濾光層之穿透頻譜之示意圖。FIG. 2 is a schematic diagram showing the light-emitting spectrum of the backlight and the penetration spectrum of the green filter layer in FIG. 1 .
第3圖繪示另一種液晶顯示器之示意圖。FIG. 3 is a schematic view showing another liquid crystal display.
第4圖繪示根據本發明之一較佳實施例之發光方法流程圖。4 is a flow chart showing a method of illuminating according to a preferred embodiment of the present invention.
D‧‧‧差值D‧‧‧Difference
FWHM‧‧‧半高寬FWHM‧‧‧Half width
I1‧‧‧第一交會點I1‧‧‧First meeting point
I2‧‧‧第二交會點I2‧‧‧Second meeting point
L1‧‧‧白光之歸一化之發光頻譜The normalized luminescence spectrum of L1‧‧‧ white light
L2‧‧‧綠色濾光層之穿透頻譜L2‧‧‧Green filter layer penetration spectrum
P1‧‧‧第一峰值P1‧‧‧ first peak
P2‧‧‧第二峰值P2‧‧‧ second peak
wI1、wI2、wP1、wP2‧‧‧波長wI1, wI2, wP1, wP2‧‧‧ wavelength
Claims (14)
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| US20050116619A1 (en) * | 2002-03-15 | 2005-06-02 | Idemitsu Kosan Co. Ltd. | Color emission device |
| EP1715473A2 (en) * | 2005-04-18 | 2006-10-25 | Avago Technologies General IP (Singapore) Pte. Ltd | Colour filter arrangement for a liquid crystal display device |
| TW200736676A (en) * | 2006-03-01 | 2007-10-01 | Toyo Ink Mfg Co | Color filter and liquid crystal display device |
| US20080084706A1 (en) * | 2006-10-04 | 2008-04-10 | Rakesh Roshan | Display |
| TW200825518A (en) * | 2006-12-15 | 2008-06-16 | Au Optronics Corp | Liquid crystal display |
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| US20050116619A1 (en) * | 2002-03-15 | 2005-06-02 | Idemitsu Kosan Co. Ltd. | Color emission device |
| EP1715473A2 (en) * | 2005-04-18 | 2006-10-25 | Avago Technologies General IP (Singapore) Pte. Ltd | Colour filter arrangement for a liquid crystal display device |
| TW200736676A (en) * | 2006-03-01 | 2007-10-01 | Toyo Ink Mfg Co | Color filter and liquid crystal display device |
| US20080084706A1 (en) * | 2006-10-04 | 2008-04-10 | Rakesh Roshan | Display |
| TW200825518A (en) * | 2006-12-15 | 2008-06-16 | Au Optronics Corp | Liquid crystal display |
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