TWI454796B - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
- Publication number
- TWI454796B TWI454796B TW097148108A TW97148108A TWI454796B TW I454796 B TWI454796 B TW I454796B TW 097148108 A TW097148108 A TW 097148108A TW 97148108 A TW97148108 A TW 97148108A TW I454796 B TWI454796 B TW I454796B
- Authority
- TW
- Taiwan
- Prior art keywords
- light
- light emitting
- guide plate
- emitting diode
- liquid crystal
- Prior art date
Links
Landscapes
- Planar Illumination Modules (AREA)
Description
本發明係關於一種液晶顯示裝置，特別是關於一種液晶顯示裝置，其透過將期望之顏色混合入一導光板中且透過將導光板之側表面與一發光二極體陣列之兩端的發光二極體的光發射表面之端部相一致配設以發出光線，能夠去除一導光板之外部及邊緣部份的劣等的色彩分離現象。The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device that mixes a desired color into a light guide plate and transmits the light emitting diodes on both sides of the light guide plate and the two ends of the light emitting diode array. The ends of the light-emitting surface of the body are uniformly arranged to emit light, which can remove the inferior color separation phenomenon of the outer and edge portions of a light guide plate.
近來，通常使用液晶顯示裝置中的陰極射線管(Cathode Ray Tube,CRT)，陰極射線管(CRT)主要用作一電視、一測量裝置、資訊終端裝置等的監視器。然而，由於陰極射線管(CRT)之重量及尺寸，其不能夠積極應用於小尺寸及輕重量的電子產品中。因此，陰極射線管(CRT)對於變得小型及輕型的電子產品之趨勢具有限制。陰極射線管(CRT)之替代品包含有一使用一電場光效應的液晶顯示裝置(LCD)、一使用氣體放電的電漿顯示面板(PDP)、以及一使用一電場發光效應的電致發光顯示(Electro Luminescence Display,ELD)裝置，在這些顯示裝置中，液晶顯示裝置正在受到積極的研究。Recently, a cathode ray tube (CRT) in a liquid crystal display device, which is mainly used as a monitor for a television, a measuring device, an information terminal device, or the like, is generally used. However, due to the weight and size of cathode ray tubes (CRTs), they cannot be actively applied to small-sized and light-weight electronic products. Therefore, cathode ray tubes (CRTs) have limitations on the trend toward becoming smaller and lighter electronic products. A replacement for a cathode ray tube (CRT) includes a liquid crystal display device (LCD) using an electric field light effect, a plasma display panel (PDP) using a gas discharge, and an electroluminescence display using an electric field luminescence effect ( Electro Luminescence Display (ELD) devices, among which liquid crystal display devices are being actively studied.
為了替代陰極射線管(CRT)，近來，具有小尺寸、輕型及低功耗的液晶顯示裝置(LCD)被開發出用作一平板顯示裝置。因此，液晶顯示裝置(LCD)用作一桌面型電腦之監視器且作為大 尺寸的資訊顯示裝置，並且作為許多其他目的的顯示裝置。因此，對液晶顯示裝置(LCD)之需求不斷增加。In order to replace a cathode ray tube (CRT), recently, a liquid crystal display device (LCD) having a small size, a light weight, and a low power consumption has been developed as a flat panel display device. Therefore, a liquid crystal display device (LCD) is used as a monitor for a desktop computer and as a large Size information display device, and as a display device for many other purposes. Therefore, the demand for liquid crystal display devices (LCDs) is increasing.
液晶顯示裝置(LCD)主要可分為一用以顯示影像之液晶顯示面板及一向液晶顯示面板作用驅動訊號之驅動電路。液晶顯示面板包含有第一及第二玻璃基板，第一及第二玻璃基板以其間的一定間隔相結合且一液晶層注入於第一及第二玻璃基板之間。The liquid crystal display device (LCD) can be mainly divided into a liquid crystal display panel for displaying images and a driving circuit for driving driving signals to the liquid crystal display panel. The liquid crystal display panel includes first and second glass substrates, the first and second glass substrates are combined at a certain interval therebetween, and a liquid crystal layer is injected between the first and second glass substrates.
同時，由於液晶顯示裝置主要透過調節光源量實現為顯示影像的光接收裝置，因此需要一單獨的將光線照射於液晶面板之上的光源，此光線稱為背光。背光根據一燈管單元安裝之位置可分類為一邊緣型及一直下型。At the same time, since the liquid crystal display device is mainly realized as a light receiving device for displaying an image by adjusting the amount of the light source, a separate light source for illuminating the liquid crystal panel is required, and the light is referred to as a backlight. The backlight can be classified into an edge type and a continuous type according to the position where a lamp unit is mounted.
此光源可分類為一電致發光(Electro Luminescence,EL)、一發光二極體(LED)、一冷陰極螢光燈管(Cold Cathode Fluorescent Lamp,CCFL)、一外部電極螢光燈管(External Electrode Fluorescent Lamp,EEFL)等。在這些光源之中，冷陰極螢光燈管(CCFL)由於具有長壽命及低功耗且較薄，因此其廣泛應用於大屏幕彩色薄膜電晶體(TFT)液晶顯示裝置中。冷陰極螢光燈管(CCFL)用作一螢光放電管，其中汞(Hg)氣以及添加入汞(Hg)氣中的氬(Ar)、氖(Ne)等以低壓密封以便實現一彭寧效應。The light source can be classified into an electroluminescence (EL), a light emitting diode (LED), a Cold Cathode Fluorescent Lamp (CCFL), and an external electrode fluorescent tube (External). Electrode Fluorescent Lamp, EEFL), etc. Among these light sources, cold cathode fluorescent lamps (CCFLs) are widely used in large-screen color thin film transistor (TFT) liquid crystal display devices because of their long life and low power consumption and thinness. A cold cathode fluorescent lamp (CCFL) is used as a fluorescent discharge tube in which mercury (Hg) gas and argon (Ar), neon (Ne), etc. added to mercury (Hg) gas are sealed at a low pressure to realize a Peng Ning effect.
放電管的兩端形成有電極。一陰極形成為一板狀。當作用一電壓時，類似一噴鍍現象，放電管中之放電粒子與板狀的陰極相碰撞且因此產生一次級電子。因此，外部元件被激發，由此形成 電漿。這使得外圍元件發射一強紫外線。然後，紫外線刺激一螢光物質，並且因此螢光物質發射一可見光。Electrodes are formed at both ends of the discharge tube. A cathode is formed in a plate shape. When a voltage is applied, similar to a sputtering phenomenon, the discharge particles in the discharge tube collide with the plate-shaped cathode and thus generate primary electrons. Therefore, external components are excited, thereby forming Plasma. This causes the peripheral components to emit a strong ultraviolet ray. The ultraviolet light then stimulates a fluorescent substance, and thus the fluorescent substance emits a visible light.
上述之邊緣型表示一燈管單元安裝於導向光線的導光板之側表面。此燈管單元具有一發射光線之燈管、一燈管保持器、以及一燈管反射板，其中燈管保持器透過***至燈管之兩端中用以保護燈管，燈管反射板透過包圍燈管的外圓周表面且具有一個***於導光板之側表面中之側表面用以將燈管照射出之光線朝向導光板反射。燈管單元安裝在導光板側表面的邊緣型通常應用於一相對小型的液晶顯示裝置，例如一膝上型電腦及一桌面型電腦。邊緣型具有光線照射均勻、使用壽命長且液晶顯示裝置能夠容易形成一薄外形之優點。The edge type described above indicates that a lamp unit is mounted on a side surface of the light guide plate that guides the light. The lamp unit has a light-emitting tube, a tube holder, and a tube reflector. The tube holder is inserted into the two ends of the tube for protecting the tube, and the tube reflector is transparent. The outer circumferential surface of the lamp tube is surrounded and has a side surface inserted into the side surface of the light guide plate for reflecting the light emitted from the lamp tube toward the light guide plate. The edge type in which the lamp unit is mounted on the side surface of the light guide plate is generally applied to a relatively small liquid crystal display device such as a laptop computer and a desktop computer. The edge type has the advantages of uniform light irradiation, long service life, and the liquid crystal display device can easily form a thin profile.
根據邊緣型背光單元，從螢光燈管照射出之光線收集於一導光板之光入射表面上且然後順次通過導光板、一擴散板及一棱鏡傳送至液晶顯示面板。然而，使用習知技術之螢光燈管的背光單元由於光源本身的發光特性而具有一低色彩再生範圍。因此由於螢光燈管之尺寸及能力的限制，難以獲得一高亮度的背光單元。According to the edge type backlight unit, the light emitted from the fluorescent tube is collected on the light incident surface of a light guide plate and then sequentially transmitted to the liquid crystal display panel through the light guide plate, a diffusion plate and a prism. However, the backlight unit using the fluorescent tube of the prior art has a low color reproduction range due to the light-emitting characteristics of the light source itself. Therefore, it is difficult to obtain a high-brightness backlight unit due to the limitation of the size and capability of the fluorescent tube.
同時，直下型與邊緣型的不同之處在於光源的位置及排列，直下型積極應用於具有較大尺寸(例如大於20英寸)的液晶顯示裝置之開發中。直下型在擴散板之底表面上將複數個燈管排列成一行且然後直接朝向液晶顯示面板之前表面照射光線。由於直下型背光單元之光線使用效率相比較於邊緣型背光單元更大，因此 其主要用作需要高亮度的大屏幕液晶顯示裝置。At the same time, the difference between the direct type and the edge type is the position and arrangement of the light source, and the direct type is actively applied to the development of a liquid crystal display device having a large size (for example, more than 20 inches). The direct type arranges a plurality of lamps in a row on the bottom surface of the diffusion plate and then directly illuminates the surface toward the front surface of the liquid crystal display panel. Since the light use efficiency of the direct type backlight unit is larger than that of the edge type backlight unit, It is mainly used as a large-screen liquid crystal display device requiring high brightness.
上述之邊緣型及直下型背光單元使用螢光燈管作為光源。然而，由於近來對螢光燈管中的有害氣體的關心，已展開對新型光源的研究。在可用的光源之中，由於發光二極體(LED)不產生環境污染，因此其成為新光源之熱點，發光二極體(LED)能夠產生不同的顏色且能夠減少功耗。The edge type and direct type backlight units described above use a fluorescent tube as a light source. However, research on new light sources has been carried out due to recent concerns about harmful gases in fluorescent tubes. Among the available light sources, since the light-emitting diode (LED) does not cause environmental pollution, it becomes a hot spot of a new light source, and the light-emitting diode (LED) can generate different colors and can reduce power consumption.
以下，將結合「第1圖」至「第5圖」描述習知技術之使用發光二極體(LED)光源的液晶顯示裝置。Hereinafter, a liquid crystal display device using a light-emitting diode (LED) light source of the prior art will be described with reference to "Fig. 1" to "Fig. 5".
「第1圖」係為習知技術之具有一背光單元的液晶顯示裝置之截面圖。The "Fig. 1" is a cross-sectional view of a liquid crystal display device having a backlight unit of the prior art.
「第2圖」係為習知技術之發光二極體(LED)陣列之排列結構及一導光板之平面圖。The "Fig. 2" is an arrangement structure of a light-emitting diode (LED) array of a prior art and a plan view of a light guide plate.
「第3圖」係為習知技術之發光二極體(LED)陣列之示意圖。"Fig. 3" is a schematic diagram of a conventional light emitting diode (LED) array.
「第4圖」係為習知技術之發光二極體(LED)陣列及導光板之示意圖。Fig. 4 is a schematic view of a light-emitting diode (LED) array and a light guide plate of the prior art.
「第5圖」係為在習知技術之液晶顯示裝置中，在導光板與發光二極體(LED)陣列以預定距離(D)彼此相間隔的狀態下，當一光線入射於導光板上時劣等色彩分離現象產生之主視圖。In the liquid crystal display device of the prior art, when a light guide plate and a light emitting diode (LED) array are spaced apart from each other by a predetermined distance (D), a light is incident on the light guide plate. The main view of the color separation phenomenon.
如「第1圖」所示，習知技術之液晶顯示裝置包含有一顯示影像之液晶顯示面板70及一朝向液晶顯示面板70發射光線的背 光單元10。這裡，雖然圖未示，在液晶顯示面板70之中，液晶注入於一頂基板及一底基板之間。進一步而言，液晶顯示面板70具有一間隔物用以維持頂基板及底基板之間均勻的間隔。液晶顯示面板70之頂基板具有一彩色濾光器、一共同電極、一黑矩陣等。液晶顯示面板70之底基板具有訊號線，例如一資料線及一閘極線。此外，一薄膜電晶體(Thin Film Transistor,TFT)形成於資料線及閘極線之交叉處。薄膜電晶體(TFT)根據閘極線的掃描訊號(閘極脈波)轉化資料線的資料訊號用以傳送至一液晶單元。進一步而言，一畫素電極形成於資料線與閘極線之間的一畫素區域。一頂極化面板附加至此液晶顯示面板之頂基板上且一底極化面板附加之其底基板上。As shown in FIG. 1, a liquid crystal display device of the prior art includes a liquid crystal display panel 70 that displays an image and a back that emits light toward the liquid crystal display panel 70. Light unit 10. Here, although not shown, in the liquid crystal display panel 70, liquid crystal is injected between a top substrate and a base substrate. Further, the liquid crystal display panel 70 has a spacer for maintaining a uniform interval between the top substrate and the base substrate. The top substrate of the liquid crystal display panel 70 has a color filter, a common electrode, a black matrix, and the like. The bottom substrate of the liquid crystal display panel 70 has signal lines, such as a data line and a gate line. In addition, a thin film transistor (TFT) is formed at the intersection of the data line and the gate line. The thin film transistor (TFT) converts the data signal of the data line according to the scanning signal (gate pulse wave) of the gate line for transmission to a liquid crystal cell. Further, a pixel electrode is formed in a pixel region between the data line and the gate line. A top polarized panel is attached to the top substrate of the liquid crystal display panel and a bottom polarized panel is attached to the bottom substrate.
同時，如「第1圖」及「第2圖」所示，背光單元10包含有一與液晶顯示面板70相面對的導光板30、一位於發光二極體(LED)陣列之底側面的反射板20。發光二極體(LED)陣列包含有複數個發光二極體(LED)11，發光二極體(LED)11由分別配設於導光板30之側面的紅色、綠色及藍色發光二極體(LED)11R、11G、11B組成。進一步而言，背光單元10更包含有導光板30與液晶顯示面板70之間的一光片60。背光單元10透過固定一主支撐17及一底罩21而***。Meanwhile, as shown in FIG. 1 and FIG. 2, the backlight unit 10 includes a light guide plate 30 facing the liquid crystal display panel 70 and a reflection on the bottom side of the array of light emitting diodes (LEDs). Board 20. The light emitting diode (LED) array includes a plurality of light emitting diodes (LEDs) 11 , and the light emitting diodes (LEDs 11 ) are respectively disposed on the sides of the light guiding plate 30 , and the red, green and blue light emitting diodes are respectively disposed. (LED) 11R, 11G, 11B. Further, the backlight unit 10 further includes a light sheet 60 between the light guide plate 30 and the liquid crystal display panel 70. The backlight unit 10 is inserted by fixing a main support 17 and a bottom cover 21.
光片60可分為一垂直光片61及一水平光片62。這裡，光片60用以增加通過光片60的光線之前部亮度。也就是說，光片60 僅傳送一特定角度之光線。而且，以其他角度入射之光線在光片60中發生內部全反射且因此返回至此光片之底部。然後，此返回之光線透過反射板20反射。The light sheet 60 can be divided into a vertical light sheet 61 and a horizontal light sheet 62. Here, the light sheet 60 is used to increase the brightness of the front portion of the light passing through the light sheet 60. That is to say, the light sheet 60 Only a certain angle of light is transmitted. Moreover, light incident at other angles undergoes internal total reflection in the light sheet 60 and thus returns to the bottom of the light sheet. Then, the returned light is reflected by the reflecting plate 20.
如「第2圖」至「第4圖」所示，由複數個發光二極體(LED)11組成的發光二極體(LED)陣列固定於金屬材料形成的印刷電路板(PCB)13之上。並且印刷電路板(PCB)13安裝於主支撐17之中。進一步而言，一連接件80配設於印刷電路板(PCB)13之一頂表面之邊緣部份以便通過一電纜15將發光二極體(LED)陣列之每一發光二極體(LED)與一外部電路電連接。As shown in "Fig. 2" to "Fig. 4", an array of light emitting diodes (LEDs) composed of a plurality of light emitting diodes (LEDs) 11 is fixed to a printed circuit board (PCB) 13 made of a metal material. on. And a printed circuit board (PCB) 13 is mounted in the main support 17. Further, a connecting member 80 is disposed on an edge portion of a top surface of a printed circuit board (PCB) 13 to connect each of the light emitting diode (LED) arrays through a cable 15. Electrically connected to an external circuit.
此外，導光板停止件19位於主支撐17內部之兩個邊緣部份以便防止發光二極體(LED)11及導光板30受到產品之振動且防止發光二極體(LED)受到由於發光二極體(LED)11與導光板30之間的接觸產生之損壞。這裡，導光板停止件19位於主支撐17內部之兩側且與導光板30之兩個邊緣部份相對應以便與導光板30之兩個邊緣部份相接觸且因此支撐導光板30。導光板停止件19相比較於發光二極體(LED)稍高以便當維持發光二極體(LED)11與導光板30之間的間隙時，能夠與導光板30相接觸且支撐導光板30。因此，能夠防止由於產品之振動產生的導光板30與發光二極體(LED)陣列直接相接觸。In addition, the light guide plate stopper 19 is located at two edge portions inside the main support 17 to prevent the light emitting diode (LED) 11 and the light guide plate 30 from being subjected to vibration of the product and preventing the light emitting diode (LED) from being exposed due to the light emitting diode. Damage caused by contact between the body (LED) 11 and the light guide plate 30. Here, the light guide stop 19 is located on both sides of the inside of the main support 17 and corresponds to both edge portions of the light guide plate 30 so as to be in contact with both edge portions of the light guide plate 30 and thus support the light guide plate 30. The light guide plate stopper 19 is slightly higher than the light emitting diode (LED) so as to be in contact with the light guide plate 30 and support the light guide plate 30 when maintaining a gap between the light emitting diode (LED) 11 and the light guide plate 30. . Therefore, it is possible to prevent the light guide plate 30 which is generated due to the vibration of the product from coming into direct contact with the array of light emitting diodes (LEDs).
這裡，如「第1圖」及「第2圖」所示，發光二極體(LED)陣列與導光板30之光入射表面30a以一預定距離(D)相分離。 這裡，發光二極體(LED)陣列之兩個邊緣部份的最外部份的紅色發光二極體(LED)11R及藍色發光二極體(LED)11B以預定距離與導光板30之光入射表面30a之兩側端相分離。進一步而言，如「第3圖」及「第4圖」所示，連接件80與導光板30之側表面相鄰的光入射表面30a之一邊緣部份相對應，也就是說，連接件80位於印刷電路板(PCB)13的頂表面之一邊緣部份。Here, as shown in "Fig. 1" and "Fig. 2", the light emitting diode (LED) array is separated from the light incident surface 30a of the light guide plate 30 by a predetermined distance (D). Here, the outermost portions of the red light emitting diode (LED) 11R and the blue light emitting diode (LED) 11B of the two edge portions of the light emitting diode (LED) array are separated from the light guide plate 30 by a predetermined distance. The both ends of the light incident surface 30a are separated. Further, as shown in "Fig. 3" and "Fig. 4", the connecting member 80 corresponds to an edge portion of the light incident surface 30a adjacent to the side surface of the light guide plate 30, that is, the connecting member 80 is located at an edge portion of one of the top surfaces of the printed circuit board (PCB) 13.
然而，習知技術之液晶顯示裝置具有以下問題。在習知技術之液晶顯示裝置中，發射之光線不能夠實現為白色，而僅能夠實現為其他顏色。也就是說，當使用R、G、B發光二極體(LED)時，根據R、G、B之波長及光密度或者R、G、B發光二極體(LED)陣列之位置及排列方式，如「第5圖」之〞A〞及〞B〞所示，一紅色光透過紅色發光二極體(LED)在導光板之左端發射且一藍色光透過藍色發光二極體(LED)在導光板之右端發射。由於導光板與發光二極體(LED)陣列以其間的預定間隙(例如，「第1圖」所示之〞D〞)彼此相分離，因此紅色光在導光板之左端發射且一藍色光在導光板之右端發射。特別地，由於此液晶顯示裝置之邊緣部份，即導光板之兩端的色彩分離現象，在導光板之光入射部份之端部不再現期望的白色光線。However, the liquid crystal display device of the prior art has the following problems. In the liquid crystal display device of the prior art, the emitted light cannot be realized in white, but can be realized only in other colors. That is to say, when using R, G, B light-emitting diodes (LEDs), according to the wavelength and optical density of R, G, B or the position and arrangement of R, G, B light-emitting diode (LED) arrays As shown in 第A〞 and 〞B〞 of Figure 5, a red light is emitted through the red light-emitting diode (LED) at the left end of the light guide plate and a blue light is transmitted through the blue light-emitting diode (LED). It is emitted at the right end of the light guide plate. Since the light guide plate and the light emitting diode (LED) array are separated from each other with a predetermined gap therebetween (for example, 〞D〞 shown in FIG. 1), red light is emitted at the left end of the light guide plate and a blue light is emitted. The right end of the light guide plate is emitted. In particular, due to the color separation phenomenon of the edge portions of the liquid crystal display device, that is, both ends of the light guide plate, the desired white light is not reproduced at the end portion of the light incident portion of the light guide plate.
產生色彩分離現象的原因如下。由於發光二極體(LED)陣列端部的一發光二極體(LED)發射之光線相比較於一相鄰發光二極體(LED)發射之光線強度更大，因此甚至當電源精確作用 於每一發光二極體(LED)時，透過實現其他顏色的發光二極體(LED)在導光板之光入射部份之端部不再現期望的白色光線。The reason for the color separation phenomenon is as follows. Since the light emitted by a light emitting diode (LED) at the end of the LED array is more intense than the light emitted by an adjacent light emitting diode (LED), even when the power supply is accurately applied In each of the light-emitting diodes (LEDs), the desired white light is not reproduced at the end of the light incident portion of the light guide plate by the light-emitting diodes (LEDs) that realize other colors.
同時，在習知技術之液晶顯示裝置中，當代替使用白色發光二極體(LED)時，因為習知技術之發光二極體(LED)數目較多，所以可增加功耗及產熱。為了控制產熱之增加，一金屬印刷電路板(PCB)用於此液晶顯示裝置中。當金屬印刷電路板(PCB)用於液晶顯示裝置時，需要連接此發光二極體(LED)驅動單元的另外電纜及連接件。Meanwhile, in the liquid crystal display device of the prior art, when a white light-emitting diode (LED) is used instead, since the number of light-emitting diodes (LEDs) of the prior art is large, power consumption and heat generation can be increased. In order to control the increase in heat generation, a metal printed circuit board (PCB) is used in this liquid crystal display device. When a metal printed circuit board (PCB) is used for a liquid crystal display device, additional cables and connectors for connecting the light emitting diode (LED) drive unit are required.
因此，發光二極體(LED)不能夠設置於具有發光二極體(LED)陣列的金屬印刷電路板(PCB)之一頂表面之一邊緣部份。進一步而言，由於電纜及連接件位於金屬印刷電路板(PCB)之頂表面的邊緣部份，因此金屬印刷電路板(PCB)上用以設置發光二極體(LED)的可用空間會減少，並且因此可減少金屬印刷電路板(PCB)上能夠配設的發光二極體(LED)之數目。Therefore, the light emitting diode (LED) cannot be disposed on one of the edge portions of one of the top surfaces of the metal printed circuit board (PCB) having the array of light emitting diodes (LEDs). Further, since the cable and the connector are located at the edge portion of the top surface of the metal printed circuit board (PCB), the available space for setting the light emitting diode (LED) on the metal printed circuit board (PCB) is reduced. And thus the number of light-emitting diodes (LEDs) that can be placed on a metal printed circuit board (PCB) can be reduced.
而且，為了防止由於發光二極體(LED)陣列與導光板之間的接觸產生對發光二極體(LED)陣列的損傷，一導光板停止件(Light Guide Plate,LGP停止件)應另外形成於主支撐中之兩個邊緣部份，並且與具有發光二極體(LED)陣列的印刷電路板(PCB)相分離。因此，液晶顯示裝置之結構可變複雜且可增加此液晶顯示裝置之製造成本。Moreover, in order to prevent damage to the light emitting diode (LED) array due to contact between the light emitting diode (LED) array and the light guide plate, a light guide plate (LGP stop) should be additionally formed. The two edge portions of the main support are separated from the printed circuit board (PCB) having an array of light emitting diodes (LEDs). Therefore, the structure of the liquid crystal display device can be complicated and the manufacturing cost of the liquid crystal display device can be increased.
因此，鑒於上述問題，本發明之一方面在於提供一液晶顯示裝置，其透過將期望之顏色混合入一導光板中且透過將導光板之側表面與一發光二極體陣列之兩端的發光二極體的光發射表面之端部相一致配設用以發出光線，能夠去除一導光板之外部及邊緣部份的劣等的色彩分離現象。Therefore, in view of the above problems, an aspect of the present invention provides a liquid crystal display device that mixes a desired color into a light guide plate and transmits light from both sides of the light guide plate to both ends of a light emitting diode array. The ends of the light-emitting surfaces of the polar bodies are uniformly arranged to emit light, and the inferior color separation phenomenon of the outer and edge portions of a light guide plate can be removed.
本發明之另一方面在於提供一液晶顯示裝置用以克服與習知技術相關之限制及缺點。Another aspect of the present invention is to provide a liquid crystal display device for overcoming the limitations and disadvantages associated with the prior art.
為了獲得本發明的目的這些和其他優點，現對本發明作具體化和概括性的描述，本發明的一種液晶顯示裝置包含有一液晶顯示面板，一此液晶顯示面板之下的導光板，以及一具有複數個發光二極體的發光二極體陣列，其中這些發光二極體中位於兩端的發光二極體之側表面與導光板之兩個側表面相一致，並且發光二極體之光發射表面靠近於導光板之光入射表面。In order to attain these and other advantages of the present invention, a liquid crystal display device of the present invention includes a liquid crystal display panel, a light guide plate under the liquid crystal display panel, and a a plurality of light emitting diode arrays of light emitting diodes, wherein side surfaces of the light emitting diodes at both ends of the light emitting diodes are coincident with the two side surfaces of the light guide plate, and light emitting surfaces of the light emitting diodes Close to the light incident surface of the light guide plate.
進一步而言，本發明之另一實施例提供的一種液晶顯示裝置包含有一液晶顯示面板，一此液晶顯示面板之下的導光板，以及一具有複數個發光二極體的發光二極體陣列，其中這些發光二極體中位於兩端的發光二極體的至少一半的光發射表面與鄰近導光板之側表面的光入射表面相重疊，並且這些發光二極體的光發射表面靠近於導光板之光入射表面。Further, a liquid crystal display device according to another embodiment of the present invention includes a liquid crystal display panel, a light guide plate under the liquid crystal display panel, and an array of light emitting diodes having a plurality of light emitting diodes. Wherein at least half of the light emitting surfaces of the light emitting diodes at the two ends of the light emitting diodes overlap the light incident surface of the side surface adjacent to the light guiding plate, and the light emitting surfaces of the light emitting diodes are close to the light guiding plate Light is incident on the surface.
另一方面，本發明之一實施例提供的一種液晶顯示裝置包含有一具有液晶的液晶顯示面板，以及一背光單元，背光單元包含 有一發光二極體(LED)陣列，發光二極體(LED)陣列具有複數個發光二極體，具有一周邊發光二極體的發光二極體位於此發光二極體陣列之一外圍端，以及一導光板，其位於液晶顯示面板之下，每一發光二極體具有一光發射表面，光發射表面用以將光線發射至導光板之一光入射表面，其中周邊發光二極體之光發射表面完全覆蓋光入射表面之一外圍端，光入射表面之外圍端為一與導光板之一側表面相鄰之區域。In another aspect, a liquid crystal display device according to an embodiment of the present invention includes a liquid crystal display panel having a liquid crystal, and a backlight unit, and the backlight unit includes An array of light emitting diodes (LEDs) having a plurality of light emitting diodes, and a light emitting diode having a peripheral light emitting diode is disposed at a peripheral end of the light emitting diode array. And a light guide plate, which is located under the liquid crystal display panel, each of the light emitting diodes has a light emitting surface for emitting light to one of the light incident surfaces of the light guide plate, wherein the light of the peripheral light emitting diode The emitting surface completely covers one of the peripheral ends of the light incident surface, and the peripheral end of the light incident surface is a region adjacent to one side surface of the light guide plate.
另一方面，本發明之一實施例提供的一種液晶顯示裝置之背光單元包含有一發光二極體(LED)陣列，此發光二極體(LED)陣列具有複數個發光二極體，具有一周邊發光二極體的這些發光二極體位於發光二極體陣列之一外圍端，以及一導光板，其位於液晶顯示面板之下，每一發光二極體具有一光發射表面，光發射表面用以將光線發射至導光板之一光入射表面，其中周邊發光二極體之光發射表面完全覆蓋光入射表面之一外圍端，光入射表面之外圍端為一與導光板之一側表面相鄰之區域。In another aspect, a backlight unit of a liquid crystal display device according to an embodiment of the present invention includes an array of light emitting diodes (LEDs) having a plurality of light emitting diodes having a periphery. The light-emitting diodes of the light-emitting diode are located at one peripheral end of the light-emitting diode array, and a light guide plate is disposed under the liquid crystal display panel, each light-emitting diode has a light-emitting surface, and the light-emitting surface is used for the light-emitting surface. The light is emitted to one of the light incident surfaces of the light guide plate, wherein the light emitting surface of the peripheral light emitting diode completely covers one of the peripheral ends of the light incident surface, and the peripheral end of the light incident surface is adjacent to one side surface of the light guide plate The area.
另一方面，本發明之一實施例提供的一種液晶顯示裝置包含有一具有液晶的液晶顯示面板，以及一背光單元，背光單元包含有一發光二極體(LED)陣列，此發光二極體(LED)陣列具有複數個發光二極體，以及一導光板，其位於液晶顯示面板之下，每一發光二極體具有一光發射表面，光發射表面用以將光線發射至導光板之一光入射表面，其中這些發光二極體之光發射表面與 導光板之光入射表面之間的一間隙係為這些發光二極體之光線在發光二極體之一視角之範圍內入射於導光板之上的充分之距離。In another aspect, a liquid crystal display device according to an embodiment of the present invention includes a liquid crystal display panel having a liquid crystal, and a backlight unit including an array of light emitting diodes (LEDs), the light emitting diode (LED) The array has a plurality of light emitting diodes, and a light guide plate under the liquid crystal display panel, each light emitting diode has a light emitting surface, and the light emitting surface is used to emit light to one of the light guide plates. a surface, wherein the light emitting surfaces of the light emitting diodes are A gap between the light incident surfaces of the light guide plate is a sufficient distance that the light of the light emitting diodes is incident on the light guide plate within a range of a viewing angle of the light emitting diode.
本發明之上述及其他目的、特徵、方面及優點將透過說明書及圖式部份變得更加清楚。The above and other objects, features, aspects and advantages of the present invention will become apparent from
上述之本發明的描述可在許多方面具有變化。這些變化不應看成脫離本發明之精神及範圍，並且本領域之技術人員可以理解的是任何不脫離本發明主旨要點之變化與修飾均應屬於本發明之專利保護範圍之內。The above description of the invention may vary in many respects. These variations are not to be regarded as a departure from the spirit and scope of the invention, and it is understood by those skilled in the art that any changes and modifications may be made without departing from the spirit and scope of the invention.
以下，將結合圖式部份詳細描述本發明之較佳實施例。Hereinafter, preferred embodiments of the present invention will be described in detail in conjunction with the drawings.
「第6圖」係為本發明之一較佳實施例的液晶顯示裝置之截面圖。Fig. 6 is a cross-sectional view showing a liquid crystal display device of a preferred embodiment of the present invention.
「第7圖」係為本發明之較佳實施例的一發光二極體(LED)陣列之示意圖。Figure 7 is a schematic diagram of an array of light emitting diodes (LEDs) in accordance with a preferred embodiment of the present invention.
「第8圖」係為本發明之較佳實施例的發光二極體(LED)陣列及一導光板之示意圖。Figure 8 is a schematic view of a light emitting diode (LED) array and a light guide plate in accordance with a preferred embodiment of the present invention.
「第9圖」係為本發明之較佳實施例的發光二極體(LED)陣列之排列結構及導光板之平面圖。Fig. 9 is a plan view showing an arrangement structure of a light emitting diode (LED) array and a light guide plate according to a preferred embodiment of the present invention.
「第10圖」係為本發明之另一實施例的一發光二極體(LED)陣列之排列結構及一導光板之平面圖。Fig. 10 is a plan view showing an arrangement of a light emitting diode (LED) array and a light guide plate according to another embodiment of the present invention.
「第11圖」係為在本發明之較佳實施例之液晶顯示裝置中， 在一發光二極體(LED)陣列之兩端的發光二極體(LED)之光發射表面之端部靠近導光板之側表面的狀態下，當光線入射於導光板上時，去除導光板之光入射表面之兩端的劣等色彩分離現象之主視圖。"11th" is a liquid crystal display device in a preferred embodiment of the present invention, In a state where an end portion of a light emitting surface of a light emitting diode (LED) at both ends of a light emitting diode (LED) array is close to a side surface of the light guiding plate, when the light is incident on the light guiding plate, the light guiding plate is removed A front view of the inferior color separation phenomenon at both ends of the light incident surface.
如「第6圖」所示，本發明之液晶顯示裝置包含有一顯示影像的液晶顯示面板170及一朝向液晶顯示面板170發射光線的一背光單元100。進一步而言，複數個垂直光片161及水平光片162位於液晶顯示面板170之下。其中標號123表示一底罩。As shown in FIG. 6, the liquid crystal display device of the present invention comprises a liquid crystal display panel 170 for displaying images and a backlight unit 100 for emitting light toward the liquid crystal display panel 170. Further, a plurality of vertical light sheets 161 and horizontal light sheets 162 are located below the liquid crystal display panel 170. Reference numeral 123 denotes a bottom cover.
這裡，雖然圖未示，在液晶顯示面板170之中，液晶填充於一頂基板與一底基板之間。進一步而言，液晶顯示面板170具有一間隔物用以維持頂基板與底基板之間的均勻間隙。液晶顯示面板170之頂基板具有一彩色濾光器、一共同電極、一黑矩陣等。進一步而言，液晶顯示面板170之底基板具有訊號線，例如一資料線及一閘極線。此外，一薄膜電晶體(TFT)形成於此資料線與閘極線之交叉處。薄膜電晶體(TFT)根據閘極線的一掃描訊號(閘極脈波)轉化資料線的資料訊號用以傳送至一液晶單元。並且，一畫素電極形成於資料線與閘極線之間的一畫素區域。Here, although not shown, in the liquid crystal display panel 170, liquid crystal is filled between a top substrate and a base substrate. Further, the liquid crystal display panel 170 has a spacer for maintaining a uniform gap between the top substrate and the base substrate. The top substrate of the liquid crystal display panel 170 has a color filter, a common electrode, a black matrix, and the like. Further, the bottom substrate of the liquid crystal display panel 170 has signal lines, such as a data line and a gate line. Further, a thin film transistor (TFT) is formed at the intersection of the data line and the gate line. The thin film transistor (TFT) converts the data signal of the data line according to a scan signal (gate pulse wave) of the gate line for transmission to a liquid crystal cell. And, a pixel electrode is formed in a pixel area between the data line and the gate line.
進一步而言，與資料線及閘極線分別相連接的一墊片區形成於底基板之一側面部份。而且，一捲帶式封裝(Tape Carrier Package,TCP圖未示)附加至墊片區上，一向薄膜電晶體(TFT)作用驅動訊號的驅動器積體電路位於捲帶式封裝(TCP)中。捲帶式封裝 (TCP)用以從驅動器積體電路向資料線提供資料訊號且向閘極線提供閘極訊號。此外，一頂極化面板附加至液晶顯示面板之頂基板上且一底極化面板附加至液晶顯示面板之底基板上。Further, a pad region respectively connected to the data line and the gate line is formed on one side of the bottom substrate. Moreover, a tape carrier package (not shown) is attached to the pad area, and the driver integrated circuit for driving the signal to the thin film transistor (TFT) is located in the tape package (TCP). Tape and reel package (TCP) is used to provide a data signal from the driver integrated circuit to the data line and a gate signal to the gate line. In addition, a top polarized panel is attached to the top substrate of the liquid crystal display panel and a bottom polarized panel is attached to the bottom substrate of the liquid crystal display panel.
同時，如「第6圖」至「第8圖」所示，背光單元100包含有一與液晶顯示面板170相面對的導光板130、一位於複數個發光二極體(LED)110、110a之底側的反射板120。複數個發光二極體(LED)組成一發光二極體(LED)陣列，這些發光二極體(LED)由分別與導光板130之光入射表面130a相面對的紅色、綠色及藍色發光二極體(LED)11R、11G、11B組成。進一步而言，背光單元100更包含有導光板130與液晶顯示面板170之間的一光片160。其中光片160包含有複數個垂直光片161及水平光片162。這裡，由於背光單元100變為小、薄及輕型，當與通常用作背光單元的螢光燈管相比較時，用作光源的發光二極體(LED)在功耗、厚度、重量及亮度方面具有優點。Meanwhile, as shown in FIG. 6 to FIG. 8 , the backlight unit 100 includes a light guide plate 130 facing the liquid crystal display panel 170 and a plurality of light emitting diodes (LEDs) 110 and 110a. The reflection plate 120 on the bottom side. A plurality of light emitting diodes (LEDs) constitute an array of light emitting diodes (LEDs) which are illuminated by red, green and blue light respectively facing the light incident surface 130a of the light guide plate 130. Diodes (LEDs) 11R, 11G, 11B are composed. Further, the backlight unit 100 further includes a light sheet 160 between the light guide plate 130 and the liquid crystal display panel 170. The light sheet 160 includes a plurality of vertical light sheets 161 and horizontal light sheets 162. Here, since the backlight unit 100 becomes small, thin, and lightweight, the light-emitting diode (LED) used as a light source consumes power, thickness, weight, and brightness when compared with a fluorescent tube that is generally used as a backlight unit. Aspects have advantages.
背光單元100能夠透過一主支撐117固定。背光單元100之頂部的液晶顯示面板170可透過一頂盤(圖未示)保護。此種情況下，頂盤與主支撐117彼此相耦合且其間具有背光單元100及液晶顯示面板170。The backlight unit 100 can be fixed by a main support 117. The liquid crystal display panel 170 on the top of the backlight unit 100 can be protected by a top plate (not shown). In this case, the top plate and the main support 117 are coupled to each other with the backlight unit 100 and the liquid crystal display panel 170 therebetween.
同時，如「第7圖」至「第8圖」所示，組成發光二極體(LED)陣列的發光二極體(LED)110、110a位於一非導電柔性印刷電路板(PCB)113之上，並且由複數個紅色、綠色及藍色發光二極體 (LED)110R、110G、110B組成。詳細而言，在柔性印刷電路板(PCB)113之上且形成發光二極體(LED)陣列的發光二極體(LED)111、110a中，位於兩個邊緣部份的發光二極體(LED)110a按照相對於相鄰發光二極體(LED)110成一角度旋轉的方式設置。舉例而言，發光二極體(LED)110a能夠與一相鄰發光二極體(LED)110在垂直方向上旋轉一特定角度，例如90度。進一步而言，導光板停止件(LGP停止件)119形成於印刷電路板(PCB)113之空間113a用以防止發光二極體(LED)110、110a及導光板130由於發光二極體(LED)110與導光板130之間的接觸產生損害，空間113a透過將發光二極體(LED)110a旋轉一具體之角度獲得。這裡，導光板停止件(LGP停止件)119與印刷電路板(PCB)113之兩個邊緣部份的發光二極體(LED)110a相鄰，以便接觸及支撐導光板130的兩個邊緣部份。Meanwhile, as shown in "Fig. 7" to "Fig. 8", the light emitting diodes (LED) 110, 110a constituting the array of light emitting diodes (LEDs) are located on a non-conductive flexible printed circuit board (PCB) 113. Above, and by a plurality of red, green and blue light-emitting diodes (LED) 110R, 110G, 110B. In detail, in a light-emitting diode (LED) 111, 110a over a flexible printed circuit board (PCB) 113 and forming an array of light-emitting diodes (LEDs), light-emitting diodes located at two edge portions ( The LEDs 110a are arranged to rotate at an angle with respect to the adjacent light-emitting diodes (LEDs) 110. For example, the light emitting diode (LED) 110a can be rotated in a vertical direction with an adjacent light emitting diode (LED) 110 by a specific angle, such as 90 degrees. Further, a light guide stop (LGP stop) 119 is formed in the space 113a of the printed circuit board (PCB) 113 for preventing the light emitting diodes (LED) 110, 110a and the light guide plate 130 from being illuminated by the LED (LED) The contact between the 110 and the light guide plate 130 is damaged, and the space 113a is obtained by rotating the light emitting diode (LED) 110a by a specific angle. Here, the light guide stop (LGP stopper) 119 is adjacent to the light emitting diode (LED) 110a of the two edge portions of the printed circuit board (PCB) 113 so as to contact and support the two edge portions of the light guide plate 130. Share.
較佳地，導光板停止件(LGP停止件)119相比較於發光二極體(LED)陣列的發光二極體(LED)110、110a稍高以便當維持發光二極體(LED)110、110a與導光板130之間的一定距離時，可與導光板130相接觸且支撐導光板130。因此，導光板停止件119能夠防止由於產品之振動引起導光板130與發光二極體(LED)110、110a相接觸。特別地，導光板停止件(LGP停止件)119具有之高度足以使得發光二極體(LED)110、110a不與導光板130之光入射表面130a相接觸。進一步而言，導光板停止件(LGP停 止件)119形成為能夠減弱或吸收衝擊。舉例而言，導光板停止件(LGP停止件)119可由一柔性材料例如橡膠或一能夠減弱或吸收衝擊之材料形成。舉例而言，光板停止件(LGP停止件)119還可包含有一彈性彈簧型裝置用以減弱或吸收衝擊。Preferably, the light guide stop (LGP stop) 119 is slightly higher than the light emitting diodes (LED) 110, 110a of the light emitting diode (LED) array so as to maintain the light emitting diode (LED) 110, When a certain distance between the light guide plate 130 and the light guide plate 130 is reached, the light guide plate 130 can be in contact with the light guide plate 130. Therefore, the light guide stopper 119 can prevent the light guide plate 130 from coming into contact with the light emitting diodes (LED) 110, 110a due to vibration of the product. In particular, the light guide stop (LGP stop) 119 has a height sufficient for the light emitting diodes (LED) 110, 110a not to be in contact with the light incident surface 130a of the light guide plate 130. Further, the light guide stop (LGP stop) The stopper 119 is formed to be capable of attenuating or absorbing an impact. For example, the light guide stop (LGP stop) 119 can be formed from a flexible material such as rubber or a material that can attenuate or absorb impact. For example, the light panel stop (LGP stop) 119 may also include an elastic spring type device for attenuating or absorbing shock.
此外，一與發光二極體(LED)驅動電路相連接之金屬面板115與柔性印刷電路板(PCB)113之一底表面相耦合。這裡，金屬面板115用以防止柔性印刷電路板(PCB)113彎曲且限制複數個發光二極體(LED)產生的熱之增加。柔性印刷電路板(PCB)113將與發光二極體(LED)陣列之驅動電路電連接的金屬面板115與非導電的柔性印刷電路板(PCB)113相耦合，而代替使用一傳統的金屬印刷電路板(PCB)及一傳統印刷電路板(PCB)的電纜及連接件。因此，能夠舍去傳統的連接件且另外在去除連接件的位置配設一發光二極體(LED)110a。也就是說，發光二極體(LED)110a設置於印刷電路板(PCB)113的兩個邊緣部份得到的空間。複數個發光二極體(LED)110、110a的驅動電路包含有一控制電路，用以從發光二極體(LED)110R、110G、110B發射光線，其中發光二極體(LED)110R、110G、110B作為一點光源可產生特定顏色的光線，例如紅色光、綠色光及藍色光。Further, a metal panel 115 connected to a light emitting diode (LED) driving circuit is coupled to a bottom surface of one of the flexible printed circuit boards (PCB) 113. Here, the metal panel 115 serves to prevent the flexible printed circuit board (PCB) 113 from being bent and to limit the increase in heat generated by a plurality of light emitting diodes (LEDs). A flexible printed circuit board (PCB) 113 couples a metal panel 115 electrically connected to a driving circuit of a light emitting diode (LED) array to a non-conductive flexible printed circuit board (PCB) 113 instead of using a conventional metal printing Cables and connectors for circuit boards (PCBs) and a conventional printed circuit board (PCB). Therefore, it is possible to discard the conventional connector and additionally provide a light emitting diode (LED) 110a at a position where the connector is removed. That is, the light emitting diode (LED) 110a is disposed in a space obtained by the two edge portions of the printed circuit board (PCB) 113. The driving circuit of the plurality of LEDs 110, 110a includes a control circuit for emitting light from the LEDs 110R, 110G, 110B, wherein the LEDs 110R, 110G, 110B acts as a point source to produce light of a particular color, such as red, green, and blue.
同時，複數個垂直光片161、水平光片162用以擴散從導光板130發射出之光線且將光線路徑轉變為與液晶顯示面板170相垂直，由此提高光效率。這裡，光片160可具有一垂直光片161及 一水平光片162，或者可形成為一單層光片。進一步而言，光片160可形成為具有多於兩個光片，舉例而言，可具有多層垂直光片與/或水平光片。這裡，光片160可增加通過的光線的前部之亮度。也就是說，光片160僅傳送一特定角度之光線。而且，其他角度入射之光線透過光片160中之內部全反射而反射。然後，此返回之光線再次透過反射板120反射。At the same time, a plurality of vertical light sheets 161 and horizontal light sheets 162 are used to diffuse the light emitted from the light guide plate 130 and transform the light path to be perpendicular to the liquid crystal display panel 170, thereby improving light efficiency. Here, the light sheet 160 may have a vertical light sheet 161 and A horizontal light sheet 162 may alternatively be formed as a single layer light sheet. Further, the light sheet 160 may be formed to have more than two light sheets, for example, may have multiple layers of vertical light sheets and/or horizontal light sheets. Here, the light sheet 160 can increase the brightness of the front portion of the passing light. That is to say, the light sheet 160 transmits only a specific angle of light. Moreover, light incident at other angles is reflected by internal total reflection in the light sheet 160. Then, the returned light is again reflected by the reflecting plate 120.
同時，如「第9圖」所示，發光二極體(LED)110、110a的光發射表面111靠近於導光板130之光入射表面130a且相面對。這裡，發光二極體(LED)110、110a靠近於光入射表面130a且不與導光板130之光入射表面130a相接觸。特別地，複數個發光二極體(LED)110、110a的每一光發射表面111與導光板130之光入射表面130a之間提供足夠之距離，用以發光二極體(LED)110、110a之光線視角範圍內的光線入射於導光板130之上。一發光二極體(LED)之視角為相對於通過發光二極體(LED)之透鏡中心之中心軸測量的光強度減少為中心軸之光強度的一半之角度。此種情況下，複數個發光二極體(LED)110、110a的每一光發射表面111與導光板130之光入射表面130a之間的間隙之距離可相等或小於每一發光二極體(LED)之寬度。Meanwhile, as shown in FIG. 9, the light-emitting surface 111 of the light-emitting diodes (LED) 110, 110a is close to and facing the light incident surface 130a of the light guide plate 130. Here, the light emitting diodes (LEDs) 110, 110a are close to the light incident surface 130a and are not in contact with the light incident surface 130a of the light guide plate 130. In particular, each light emitting surface 111 of the plurality of light emitting diodes (LEDs) 110, 110a provides a sufficient distance between the light incident surface 130a of the light guide plate 130 for the light emitting diodes (LED) 110, 110a. The light within the range of the light ray is incident on the light guide plate 130. The angle of view of a light emitting diode (LED) is an angle that is reduced relative to the central axis of the lens center of the light emitting diode (LED) by half the light intensity of the central axis. In this case, the distance between each light emitting surface 111 of the plurality of light emitting diodes (LED) 110, 110a and the light incident surface 130a of the light guiding plate 130 may be equal to or smaller than each of the light emitting diodes ( The width of the LED).
如「第9圖」所示，發光二極體(LED)陣列兩端的發光二極體(LED)110a的光發射表面111之每一外端面與導光板130之側表面130b在同一直線上。也就是說，發光二極體(LED)陣 列兩端的發光二極體(LED)110a之光發射表面111的每一端與導光板130之側表面130b相一致。這裡，發光二極體(LED)陣列兩端的發光二極體(LED)110a可為任何紅色、綠色及藍色發光二極體(LED)。進一步而言，如「第9圖」所示，發光二極體(LED)陣列的每一發光二極體(LED)110、110a靠近於導光板130之光入射表面130a，因此全部或大部份從發光二極體(LED)110、110a發射之光線入射於導光板130中。特別地，當導光板130之左或右側表面130b與發光二極體(LED)陣列之發光二極體(LED)110a之光入射表面之每一端面相一致時，根據光線發出方向，發光二極體(LED)110a之視角通常為±50~60°。同時，當發光二極體(LED)110a之光發射表面111之端面與導光板130之側表面130b相一致時，從發光二極體(LED)陣列的發光二極體(LED)110、110a發射之全部或大部份光線入射於導光板130中。As shown in "Fig. 9," each of the outer end faces of the light-emitting surfaces 111 of the light-emitting diodes (LED) 110a at both ends of the light-emitting diode (LED) array is on the same line as the side surface 130b of the light guide plate 130. In other words, the LED array Each end of the light-emitting surface 111 of the light-emitting diode (LED) 110a at both ends of the column coincides with the side surface 130b of the light guide plate 130. Here, the light emitting diode (LED) 110a at both ends of the light emitting diode (LED) array may be any red, green, and blue light emitting diode (LED). Further, as shown in FIG. 9, each of the light emitting diodes (LEDs) 110, 110a of the light emitting diode (LED) array is close to the light incident surface 130a of the light guide plate 130, and thus all or most of the light Light rays emitted from the light emitting diodes (LED) 110, 110a are incident on the light guide plate 130. In particular, when the left or right side surface 130b of the light guide plate 130 coincides with each end surface of the light incident surface of the light emitting diode (LED) 110a of the light emitting diode (LED) array, the light emitting diode is emitted according to the light emitting direction. The viewing angle of the body (LED) 110a is usually ±50 to 60°. Meanwhile, when the end faces of the light-emitting surfaces 111 of the light-emitting diodes (LED) 110a coincide with the side surfaces 130b of the light guide plate 130, the light-emitting diodes (LEDs) 110, 110a from the array of light-emitting diodes (LEDs) All or most of the light emitted is incident on the light guide plate 130.
如「第10圖」所示，根據本發明之另一實施例，在至少多於一半的發光二極體(LED)110a之光發射表面111之與鄰近導光板130之側表面130b的光入射表面130a相重疊之狀態下，或在至少小於一半的發光二極體(LED)110a之光發射表面111從導光板130之側表面130b向外暴露用以設置發光二極體(LED)陣列的發光二極體(LED)的狀態下，發光二極體(LED)110a位於兩端且靠近於光入射表面130a。這裡，發光二極體(LED)110、 110a發射出之光線入射於導光板130之中。As shown in FIG. 10, according to another embodiment of the present invention, light incident on the light emitting surface 111 of at least more than half of the light emitting diode (LED) 110a and the side surface 130b adjacent to the light guiding plate 130 is incident. The surface 130a is overlapped, or at least less than half of the light emitting surface 111 of the light emitting diode (LED) 110a is exposed outwardly from the side surface 130b of the light guide plate 130 to provide an array of light emitting diodes (LEDs). In the state of the light emitting diode (LED), the light emitting diode (LED) 110a is located at both ends and close to the light incident surface 130a. Here, a light emitting diode (LED) 110, The light emitted from 110a is incident on the light guide plate 130.
因此，根據本發明之一實施例，透過將導光板130之側表面130b與發光二極體(LED)110a之光發射表面111的端部彼此相符合，或者根據本發明之另一實施例，將發光二極體(LED)陣列的發光二極體(LED)110a之至少多於一半的光發射表面111與鄰近導光板130之側表面130b的光入射表面130a相重疊，本發明之實施例揭露了發光二極體(LED)之光發射表面111與導光板之光入射表面130a彼此靠近。當實現本發明之這些實施例中之一時，不再存在發光二極體(LED)110a的發射區域與相鄰的發光二極體(LED)110的發射區域之間的光亮度差別。如「第11圖」中之〞C〞所示，甚至在導光板130之兩端能夠維持產生白色光的彩色的亮度比。因此，本發明之實施例能夠去除非混合區，例如「第5圖」所示之〞A〞或〞B〞，在非混合區中不同的彩色光線在一背光有效光線發射區中不能夠正確混合為白色光。Therefore, according to an embodiment of the present invention, by aligning the side surface 130b of the light guide plate 130 with the end of the light emitting surface 111 of the light emitting diode (LED) 110a, or according to another embodiment of the present invention, At least more than half of the light emitting surface 111 of the light emitting diode (LED) 110a of the light emitting diode (LED) array overlaps the light incident surface 130a adjacent to the side surface 130b of the light guiding plate 130, an embodiment of the present invention It is disclosed that the light emitting surface 111 of the light emitting diode (LED) and the light incident surface 130a of the light guiding plate are close to each other. When one of these embodiments of the present invention is implemented, there is no longer a difference in lightness between the emission area of the light emitting diode (LED) 110a and the emission area of the adjacent light emitting diode (LED) 110. As shown in 第C〞 in Fig. 11, the luminance ratio of the color which produces white light can be maintained even at both ends of the light guide plate 130. Therefore, embodiments of the present invention are capable of removing non-mixed regions, such as 〞A〞 or 〞B〞 shown in FIG. 5, in which different colored lights are not correct in a backlight effective light emitting region. Mixed into white light.
因此，形成一白色平板螢光燈管，用以將發光二極體(LED)陣列的發光二極體(LED)110、110a的光線均勻入射於導光板130上。Therefore, a white flat fluorescent tube is formed for uniformly incident light of the light emitting diodes (LEDs) 110, 110a of the light emitting diode (LED) array on the light guiding plate 130.
本發明之較佳實施例的液晶顯示裝置具有以下之優點。The liquid crystal display device of the preferred embodiment of the present invention has the following advantages.
在本發明之實施例的液晶顯示裝置中，在導光板之側表面與發光二極體(LED)陣列兩端的發光二極體(LED)之光發射表面的端部彼此相一致的狀態下，發光二極體(LED)之光發射表 面與導光板之光入射表面彼此靠近或發光二極體(LED)之至少多於一半的光發射表面與和導光板之側表面相鄰的光入射表面相重疊。因此，發光二極體(LED)陣列發射的全部或大部份光線入射於導光板中。In the liquid crystal display device of the embodiment of the present invention, in a state where the side surfaces of the light guide plate and the ends of the light emitting surfaces of the light emitting diodes (LEDs) at both ends of the light emitting diode (LED) array are coincident with each other, Light emitting diode of light emitting diode (LED) The light incident surfaces of the face and the light guide plate are close to each other or at least more than half of the light emitting surfaces of the light emitting diode (LED) overlap with the light incident surface adjacent to the side surface of the light guide plate. Therefore, all or most of the light emitted by the light emitting diode (LED) array is incident on the light guide plate.
因此，不再存在發光二極體(LED)的發射區域與相鄰發光二極體(LED)的發射區域之間的光亮度差別。因此，甚至在導光板之端部能夠維持產生白色光的彩色的亮度比，並且因此能夠去除非混合區，在非混合區中不同的彩色光線在一背光有效光線發射區中不能夠正確混合為白色光。Therefore, there is no longer a difference in lightness between the emission area of the light emitting diode (LED) and the emission area of the adjacent light emitting diode (LED). Therefore, even in the end portion of the light guide plate, the luminance ratio of the color generating white light can be maintained, and thus the non-mixing region can be removed, in which the different colored light rays cannot be correctly mixed in one backlight effective light emitting region. White light.
此外，發光二極體(LED)之光發射表面與導光板之光入射表面彼此相鄰近，並且因此能夠去除背光單元中的邊緣部份之側面發射光線的劣等色彩分離現象。因此，其能夠能夠提高一螢幕質量及作用於具有導光板的背光單元的每一模式的質量。Further, the light emitting surface of the light emitting diode (LED) and the light incident surface of the light guiding plate are adjacent to each other, and thus it is possible to remove the inferior color separation phenomenon of the side emitting light of the edge portion in the backlight unit. Therefore, it is possible to improve the quality of a screen and the quality of each mode of the backlight unit having the light guide plate.
此外，根據本發明之實施例，連接件不與發光二極體(LED)陣列一起配設於印刷電路板(PCB)之上且發光二極體(LED)按照相對於相鄰發光二極體(LED)成特定角度(例如90度)旋轉的方式位於習知技術中連接件之位置。然後，導光板停止件位於此印刷電路板(PCB)之空間上以便防止發光二極體(LED)與導光板彼此相接觸。因此，能夠有效利用產品之空間。進一步而言，由於發光二極體(LED)能夠另外形成於印刷電路板(PCB)之端部，因此其能夠提高產品之光效率。Moreover, in accordance with an embodiment of the present invention, the connector is not disposed over the printed circuit board (PCB) with the array of light emitting diodes (LEDs) and the light emitting diodes (LEDs) are aligned relative to the adjacent light emitting diodes The manner in which the (LED) is rotated at a specific angle (e.g., 90 degrees) is located at the position of the connector in the prior art. Then, the light guide stopper is located on the space of the printed circuit board (PCB) to prevent the light emitting diode (LED) and the light guide from coming into contact with each other. Therefore, the space of the product can be effectively utilized. Further, since the light emitting diode (LED) can be additionally formed at the end of the printed circuit board (PCB), it can improve the light efficiency of the product.
上述之實施例及其優點僅為示例性的，然其並非用以限定本發明。本發明之思想可易於應用至任何其他類型之裝置。本說明書為示例性且並非限制申請專利之範圍。本領域之技術人員應當意識到本發明之不同變化及修改。在此揭露之示例性實施例的特徵、結構、方法以及其他特性可以不同的方式相結合以獲得另外與/或可替換的實施例。The above embodiments and their advantages are merely exemplary, and are not intended to limit the invention. The idea of the invention can be easily applied to any other type of device. This description is exemplary and not limiting as to the scope of the patent application. Different variations and modifications of the invention will be apparent to those skilled in the art. The features, structures, methods, and other characteristics of the exemplary embodiments disclosed herein may be combined in various ways to obtain additional and/or alternative embodiments.
雖然本發明在不脫離其精神的情況下可實現為不同的形式，但是應該理解的是，除非特別指明，上述之實施例並不限制於上述說明書之任何細節，而應該在本發明之專利保護範圍之內作廣泛的理解，並且因此任何不脫離本發明主旨要點之變化與修飾均應屬於本發明之專利保護範圍之內。The present invention may be embodied in various forms without departing from the spirit thereof, and it should be understood that the above-described embodiments are not limited to the details of the above description, but should be protected by the present invention, unless otherwise specified. The scope of the invention is intended to be broadly understood, and it is intended to be within the scope of the invention.
10、100‧‧‧背光單元10, 100‧‧‧ backlight unit
11、110、110a‧‧‧發光二極體11, 110, 110a‧‧‧Lighting diodes
11R‧‧‧紅色發光二極體11R‧‧‧Red LED
11G‧‧‧綠色發光二極體11G‧‧‧Green LED
11B‧‧‧藍色發光二極體11B‧‧‧Blue LED
13、113‧‧‧印刷電路板13, 113‧‧‧ Printed circuit boards
15‧‧‧電纜15‧‧‧ cable
17、117‧‧‧主支撐17, 117‧‧‧ main support
19、119‧‧‧導光板停止件19, 119‧‧‧ Light guide plate stop
20、120‧‧‧反射板20, 120‧‧‧ reflection plate
21、123‧‧‧底罩21, 123‧‧‧ bottom cover
30、130‧‧‧導光板30, 130‧‧‧Light guide plate
30a‧‧‧光入射表面30a‧‧‧Light incident surface
60、160‧‧‧光片60, 160‧‧‧ light film
61、161‧‧‧垂直光片61,161‧‧‧Vertical light film
62、162‧‧‧水平光片62, 162‧‧‧ horizontal light film
70、170‧‧‧液晶顯示面板70, 170‧‧‧ LCD panel
80‧‧‧連接件80‧‧‧Connecting parts
111‧‧‧光發射表面111‧‧‧Light emitting surface
113a‧‧‧空間113a‧‧‧ Space
115‧‧‧金屬面板115‧‧‧Metal panels
130a‧‧‧光入射表面130a‧‧‧Light incident surface
130b‧‧‧側表面130b‧‧‧ side surface
第1圖係為習知技術之具有一背光單元的液晶顯示裝置之截面圖；第2圖係為習知技術之發光二極體陣列之排列結構及一導光板之平面圖；第3圖係為習知技術之發光二極體陣列之示意圖；第4圖係為習知技術之發光二極體陣列及導光板之示意圖；第5圖係為在習知技術之液晶顯示裝置中，在導光板與發光二極體陣列以預定距離(D)彼此相間隔的狀態下，當光線入射於導光板上時劣等色彩分離現象產生之主視圖； 第6圖係為本發明之一較佳實施例的液晶顯示裝置之截面圖；第7圖係為本發明之較佳實施例的一發光二極體陣列之示意圖；第8圖係為本發明之較佳實施例的發光二極體陣列及一導光板之示意圖；第9圖係為本發明之較佳實施例的發光二極體陣列之排列結構及導光板之平面圖；第10圖係為本發明之另一實施例的一發光二極體陣列之排列結構及一導光板之平面圖；以及第11圖係為在本發明之較佳實施例之液晶顯示裝置中，在一發光二極體陣列之兩端的發光二極體之光發射表面之端部靠近導光板之側表面的狀態下，當光線入射於導光板上時，去除導光板之光入射表面之兩端的劣等色彩分離現象之主視圖。1 is a cross-sectional view of a liquid crystal display device having a backlight unit according to the prior art; FIG. 2 is a plan view showing an arrangement structure of a light-emitting diode array of the prior art and a plan view of a light guide plate; A schematic diagram of a conventional LED array; a fourth diagram is a schematic diagram of a conventional LED array and a light guide; and FIG. 5 is a conventional liquid crystal display device in a light guide. a front view in which a color separation phenomenon occurs when light is incident on the light guide plate in a state in which the light emitting diode array is spaced apart from each other by a predetermined distance (D); 6 is a cross-sectional view of a liquid crystal display device according to a preferred embodiment of the present invention; FIG. 7 is a schematic view of a light emitting diode array according to a preferred embodiment of the present invention; FIG. 9 is a plan view showing an arrangement structure of a light-emitting diode array and a light guide plate according to a preferred embodiment of the present invention; FIG. 10 is a plan view of a light-emitting diode array and a light guide plate according to a preferred embodiment of the present invention; An arrangement structure of a light emitting diode array and a plan view of a light guide plate according to another embodiment of the present invention; and FIG. 11 is a light emitting diode in a liquid crystal display device according to a preferred embodiment of the present invention. In a state where the end of the light-emitting surface of the light-emitting diode at both ends of the array is close to the side surface of the light guide plate, when light is incident on the light guide plate, the inferior color separation phenomenon at both ends of the light incident surface of the light guide plate is removed. view.
100‧‧‧背光單元100‧‧‧Backlight unit
110a‧‧‧發光二極體110a‧‧‧Lighting diode
111‧‧‧光發射表面111‧‧‧Light emitting surface
113‧‧‧印刷電路板113‧‧‧Printed circuit board
117‧‧‧主支撐117‧‧‧ main support
119‧‧‧導光板停止件119‧‧‧Light guide stop
120‧‧‧反射板120‧‧‧reflector
123‧‧‧底罩123‧‧‧ bottom cover
130‧‧‧導光板130‧‧‧Light guide plate
130a‧‧‧光入射表面130a‧‧‧Light incident surface
160‧‧‧光片160‧‧‧ light film
161‧‧‧垂直光片161‧‧‧Vertical light film
162‧‧‧水平光片162‧‧‧ horizontal light film
170‧‧‧液晶顯示面板170‧‧‧LCD panel
Claims (13)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020080033342A KR101289070B1 (en) | 2007-11-28 | 2008-04-10 | Liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW200942927A TW200942927A (en) | 2009-10-16 |
| TWI454796B true TWI454796B (en) | 2014-10-01 |
Family
ID=41202291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW097148108A TWI454796B (en) | 2008-04-10 | 2008-12-10 | Liquid crystal display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101556403B (en) |
| TW (1) | TWI454796B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8446547B2 (en) * | 2009-12-03 | 2013-05-21 | Lg Display Co., Ltd. | Liquid crystal display device including back light unit having LED array |
| CN102147082B (en) * | 2010-01-15 | 2012-07-11 | 友达光电股份有限公司 | Backlight module and light source device thereof |
| TWI407199B (en) * | 2010-10-29 | 2013-09-01 | Au Optronics Corp | Flat panel display structure and manufacturing method thereof |
| CN102062972A (en) * | 2010-11-12 | 2011-05-18 | 友达光电股份有限公司 | Plane display structure and manufacturing method thereof |
| US8520162B2 (en) * | 2011-03-14 | 2013-08-27 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Back light module and liquid crystal display thereof |
| KR101780420B1 (en) * | 2011-03-24 | 2017-09-22 | 삼성디스플레이 주식회사 | Back-light unit and 3-dimensional image display device having the same |
| CN202074348U (en) * | 2011-05-16 | 2011-12-14 | 深圳市华星光电技术有限公司 | Liquid-crystal display and backlight module |
| KR101848861B1 (en) | 2011-08-10 | 2018-04-16 | 엘지이노텍 주식회사 | Backlight appartus |
| JP2013171626A (en) * | 2012-02-17 | 2013-09-02 | Sharp Corp | Light source board and light source module |
| KR102034229B1 (en) * | 2013-01-15 | 2019-10-18 | 엘지이노텍 주식회사 | Circuit board, lighting device having the circuit board and flat panel display having the circuit board |
| KR102131274B1 (en) * | 2013-06-28 | 2020-07-07 | 엘지이노텍 주식회사 | Lighting unit |
| CN104534337A (en) * | 2015-01-09 | 2015-04-22 | 华南理工大学 | LED panel lamp based on RGB chips and manufacturing method thereof |
| CN105889814A (en) * | 2015-11-13 | 2016-08-24 | 乐视致新电子科技（天津）有限公司 | LED lamp set, backlight module and display device |
| RU2660376C1 (en) * | 2017-06-23 | 2018-07-10 | Юрий Борисович Соколов | Flat lighting device with side lighting |
| CN110706583A (en) | 2018-07-09 | 2020-01-17 | 中强光电股份有限公司 | Backlight module and display device |
| CN110873922B (en) * | 2018-08-30 | 2022-06-07 | 苏州璨宇光学有限公司 | Backlight module and display device using same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200521535A (en) * | 2003-12-26 | 2005-07-01 | Fujitsu Display Tech | Backlight and liquid crystal display device |
| JP2006269078A (en) * | 2005-03-22 | 2006-10-05 | Hitachi Lighting Ltd | Led light source module |
| US20060220040A1 (en) * | 2005-02-28 | 2006-10-05 | Toshihiro Suzuki | Surface illuminator and liquid crystal display having the same |
| TW200731176A (en) * | 2005-12-16 | 2007-08-16 | Osram Opto Semiconductors Gmbh | Illuminator |
| US20070279944A1 (en) * | 2006-06-05 | 2007-12-06 | Epson Imaging Devices Corporation | Illumination device, liquid crystal device, and electronic apparatus |
-
2008
- 2008-10-31 CN CN2008101749943A patent/CN101556403B/en active Active
- 2008-12-10 TW TW097148108A patent/TWI454796B/en active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200521535A (en) * | 2003-12-26 | 2005-07-01 | Fujitsu Display Tech | Backlight and liquid crystal display device |
| US20060220040A1 (en) * | 2005-02-28 | 2006-10-05 | Toshihiro Suzuki | Surface illuminator and liquid crystal display having the same |
| JP2006269078A (en) * | 2005-03-22 | 2006-10-05 | Hitachi Lighting Ltd | Led light source module |
| TW200731176A (en) * | 2005-12-16 | 2007-08-16 | Osram Opto Semiconductors Gmbh | Illuminator |
| US20070279944A1 (en) * | 2006-06-05 | 2007-12-06 | Epson Imaging Devices Corporation | Illumination device, liquid crystal device, and electronic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101556403A (en) | 2009-10-14 |
| CN101556403B (en) | 2011-01-05 |
| TW200942927A (en) | 2009-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI454796B (en) | Liquid crystal display device | |
| US7944527B2 (en) | Liquid crystal display device with particular LED arrangement in backlight unit | |
| US7554625B2 (en) | Display device and backlight device having plural solid-state emitting element units each emitting at least three colors and contained within a cylindrical air-filled light guide body also surrounded by air | |
| US8967822B2 (en) | Backlight assembly and liquid crystal display module using the same | |
| CN101315439B (en) | Light guide plate, backlight assembly including the same, and liquid crystal display device including the same | |
| US8235571B2 (en) | Backlight unit of liquid crystal display device and liquid crystal display device using the same | |
| JP4896120B2 (en) | Backlight unit and liquid crystal display device using the same | |
| KR101604497B1 (en) | Backlight unit and liquid crystal display device having the same | |
| US8350987B2 (en) | Backlight unit and liquid crystal display device having the same | |
| JP2008192605A (en) | Liquid crystal display device | |
| JP4890485B2 (en) | Backlight unit and liquid crystal display device including the same | |
| TWI434106B (en) | Backlight unit and liquid crystal display device having the same | |
| US9268085B2 (en) | Liquid crystal display device | |
| KR20060010224A (en) | Back-light assembly and display having the same | |
| KR20110024270A (en) | Backlight unit and liquid crystal display device having the same | |
| KR20120049705A (en) | Liquid crystal display device | |
| KR20120075137A (en) | Lcd module including mounting member | |
| KR20120130583A (en) | Liquid crystal display device | |
| KR101415685B1 (en) | Dual display type liquid crystal display device | |
| KR101746846B1 (en) | Backlgiht unit and liquid crystal display device the same | |
| KR101909213B1 (en) | Backlgiht unit and liquid crystal display device the same | |
| KR101107684B1 (en) | LED array and Backlight Unit With Using the Same | |
| KR20140139817A (en) | Light emitting diode and liquid crystal display device having the same | |
| KR101086959B1 (en) | Back light unit | |
| KR20050051915A (en) | Back light unit |