TWI460470B - Electrowetting display device - Google Patents
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Description
本發明係關於一種電濕潤顯示裝置,尤指一種具有多重間隙之電濕潤顯示裝置。The present invention relates to an electrowetting display device, and more particularly to an electrowetting display device having multiple gaps.
電濕潤顯示裝置是利用電溼潤力操控非極性液體與極性液體的移動達到顯示效果的一種顯示裝置。電濕潤顯示裝置主要包括兩片基板、分別置於兩片基板之內側的兩電極,以及設置於兩電極之間且彼此不互溶的非極性液體與極性液體。施加於兩電極之間的電壓差可以改變電極的親水效果,進而改變接觸角。也就是說,在不存在電壓差的情況下,電極表面較為疏水親油,而在施加電壓差後,電極表面會變成較為親水疏油,因此可以控制非極性液體覆蓋於基板的面積,進而達到控制灰階的作用。然而,在習知電濕潤顯示裝置中,由於兩電極之間的任何位置的距離均為一致,其所產生的電場會是均勻的電場,因此在連續性地顯示具有不同灰階的畫面時,極性液體與非極性液體會因為受到其它作用力的影響而產生滯留現象(Hysteresis phenomenon)。滯留現象會使的非極性液體實際覆蓋於基板的面積與預定覆蓋於基板的面積有所偏差。如此一來,將使得電濕潤顯示裝置的灰階表現不佳,嚴重影響顯示品質。The electrowetting display device is a display device that utilizes an electric wetting force to control the movement of a non-polar liquid and a polar liquid to achieve a display effect. The electrowetting display device mainly comprises two substrates, two electrodes respectively disposed inside the two substrates, and a non-polar liquid and a polar liquid disposed between the two electrodes and mutually immiscible with each other. The difference in voltage applied between the two electrodes can change the hydrophilic effect of the electrode, thereby changing the contact angle. That is to say, in the absence of a voltage difference, the surface of the electrode is more hydrophobic and oleophilic, and after the application of the voltage difference, the surface of the electrode becomes more hydrophilic and oleophobic, so that the area of the non-polar liquid covering the substrate can be controlled, thereby achieving Control the role of grayscale. However, in the conventional electrowetting display device, since the distance between any two electrodes is uniform, the electric field generated is a uniform electric field, so when continuously displaying pictures having different gray levels, Polar liquids and non-polar liquids can cause a hysteresis phenomenon due to other forces. The retention phenomenon causes the area of the non-polar liquid actually covering the substrate to deviate from the area intended to cover the substrate. As a result, the gray scale performance of the electrowetting display device is not good, which seriously affects the display quality.
本發明之目的之一在於提供一種電濕潤顯示裝置,以解決習知電濕潤顯示裝置之灰階表現不佳的問題。It is an object of the present invention to provide an electrowetting display device that solves the problem of poor gray scale performance of conventional electrowetting display devices.
本發明之一實施例提供一種電濕潤顯示裝置,其具有複數個畫素區,且各畫素區包括一畫素周邊區與一主動區。上述電濕潤顯示裝置包括一第一基板、複數個第一電極、一疏水層、複數個阻隔壁、一第二基板、複數個第二電極、一極性液體以及一非極性液體。第一電極設置於第一基板上並分別位於畫素區內。疏水層設置於第一電極上。阻隔壁設置於疏水層上並分別位於畫素周邊區內。第二基板與第一基板面對設置。第二電極設置於第二基板上並分別位於畫素區內。各第二電極包括一第一子電極部與一第二子電極部。各該第二電極設置於對應之主動區內且彼此電性連接,第一子電極部與疏水層具有一第一距離,第二子電極部與疏水層具有一第二距離,且第一距離大於第二距離。極性液體位於第二電極與疏水層之間,且第二電極與極性液體接觸。非極性液體位於第二電極與疏水層之間。An embodiment of the present invention provides an electrowetting display device having a plurality of pixel regions, and each pixel region includes a pixel peripheral region and an active region. The electrowetting display device comprises a first substrate, a plurality of first electrodes, a hydrophobic layer, a plurality of barrier walls, a second substrate, a plurality of second electrodes, a polar liquid, and a non-polar liquid. The first electrodes are disposed on the first substrate and are respectively located in the pixel region. The hydrophobic layer is disposed on the first electrode. The barrier walls are disposed on the hydrophobic layer and are respectively located in the peripheral regions of the pixels. The second substrate is disposed facing the first substrate. The second electrodes are disposed on the second substrate and are respectively located in the pixel region. Each of the second electrodes includes a first sub-electrode portion and a second sub-electrode portion. Each of the second electrodes is disposed in the corresponding active region and electrically connected to each other, the first sub-electrode portion and the hydrophobic layer have a first distance, the second sub-electrode portion and the hydrophobic layer have a second distance, and the first distance Greater than the second distance. The polar liquid is between the second electrode and the hydrophobic layer, and the second electrode is in contact with the polar liquid. The non-polar liquid is located between the second electrode and the hydrophobic layer.
本發明之電濕潤顯示裝置的第二電極與第一電極之間具有兩種不同的間隙,可以精準且有效地控制極性液體與非極性液體在暗態顯示模式與亮態顯示模式下的位置,進而改善灰階表現並提升顯示品質。The second electrode of the electrowetting display device of the present invention has two different gaps between the second electrode and the first electrode, and can accurately and effectively control the position of the polar liquid and the non-polar liquid in the dark state display mode and the bright state display mode. In turn, it improves grayscale performance and improves display quality.
1‧‧‧電濕潤顯示裝置1‧‧‧Electric humidification display device
10P‧‧‧畫素區10P‧‧‧Photo District
10A‧‧‧主動區10A‧‧‧Active Area
10S‧‧‧畫素周邊區10S‧‧‧ pixels surrounding area
12‧‧‧第一基板12‧‧‧First substrate
14‧‧‧第一電極14‧‧‧First electrode
16‧‧‧疏水層16‧‧‧hydrophobic layer
18‧‧‧阻隔壁18‧‧‧ blocking wall
20‧‧‧第二基板20‧‧‧second substrate
22‧‧‧第二電極22‧‧‧second electrode
24‧‧‧極性液體24‧‧‧Polar liquid
26‧‧‧非極性液體26‧‧‧Non-polar liquid
15‧‧‧絕緣層15‧‧‧Insulation
10B‧‧‧邊框區10B‧‧‧Border area
28‧‧‧框膠28‧‧‧Box glue
221‧‧‧第一子電極部221‧‧‧First sub-electrode
222‧‧‧第二子電極部222‧‧‧Second sub-electrode
d1‧‧‧第一距離D1‧‧‧first distance
d2‧‧‧第二距離D2‧‧‧Second distance
42‧‧‧光源42‧‧‧Light source
44‧‧‧導光板44‧‧‧Light guide plate
L‧‧‧光線L‧‧‧Light
30‧‧‧凸塊結構30‧‧‧Bump structure
1’‧‧‧電濕潤顯示裝置1'‧‧‧Electric humidification display device
222M‧‧‧主電極部222M‧‧‧Main electrode section
222A‧‧‧輔助電極部222A‧‧‧Auxiliary electrode section
1”‧‧‧電濕潤顯示裝置1”‧‧‧Electric humidification display device
S1‧‧‧輔助電極層S1‧‧‧Auxiliary electrode layer
S2‧‧‧輔助電極層S2‧‧‧Auxiliary electrode layer
S3‧‧‧輔助電極層S3‧‧‧Auxiliary electrode layer
2‧‧‧電濕潤顯示裝置2‧‧‧Electric humidification display device
32‧‧‧遮光圖案32‧‧‧ shading pattern
2’‧‧‧電濕潤顯示裝置2'‧‧‧Electric humidification display device
2”‧‧‧電濕潤顯示裝置2”‧‧‧Electric humidification display device
3‧‧‧電濕潤顯示裝置3‧‧‧Electric humidification display device
34‧‧‧波長轉換層34‧‧‧wavelength conversion layer
L’‧‧‧可見光線L’‧‧ Visible light
3’‧‧‧電濕潤顯示裝置3'‧‧‧Electric humidification display
3”‧‧‧電濕潤顯示裝置3"‧‧‧Electric humidification display device
第1圖為本發明之第一實施例之電濕潤顯示裝置於暗態顯示模式之示意圖。Fig. 1 is a schematic view showing the electrowetting display device of the first embodiment of the present invention in a dark state display mode.
第2圖為本發明之第一實施例之電濕潤顯示裝置於亮態顯示模式之示意圖。Fig. 2 is a schematic view showing the electrowetting display device of the first embodiment of the present invention in a bright state display mode.
第3圖繪示了本發明之第一實施例之第一變化實施例之電濕潤顯示裝置的示意圖。FIG. 3 is a schematic view showing an electrowetting display device according to a first variation of the first embodiment of the present invention.
第4圖繪示了本發明之第一實施例之第二變化實施例之電濕潤顯示裝置的示意圖。Fig. 4 is a schematic view showing an electrowetting display device according to a second modified embodiment of the first embodiment of the present invention.
第5圖為本發明之第二實施例之電濕潤顯示裝置於亮態顯示模式之示意圖。Fig. 5 is a schematic view showing the electrowetting display device of the second embodiment of the present invention in a bright state display mode.
第6圖為本發明之第二實施例之電濕潤顯示裝置於暗態顯示模式之示意圖。Figure 6 is a schematic view showing the electrowetting display device in the dark state display mode of the second embodiment of the present invention.
第7圖繪示了本發明之第二實施例之第一變化實施例之電濕潤顯示裝置的示 意圖。7 is a diagram showing an electrowetting display device according to a first variation of the second embodiment of the present invention. intention.
第8圖繪示了本發明之第二實施例之第二變化實施例之電濕潤顯示裝置的示意圖。FIG. 8 is a schematic view showing an electrowetting display device according to a second variation of the second embodiment of the present invention.
第9圖為本發明之第三實施例之電濕潤顯示裝置於亮態顯示模式之示意圖。Figure 9 is a schematic view showing the electrowetting display device of the third embodiment of the present invention in a bright state display mode.
第10圖為本發明之第三實施例之電濕潤顯示裝置於暗態顯示模式之示意圖。Figure 10 is a schematic view showing the electrowetting display device in the dark state display mode according to the third embodiment of the present invention.
第11圖繪示了本發明之第三實施例之第一變化實施例之電濕潤顯示裝置的示意圖。11 is a schematic view showing an electrowetting display device according to a first variation of the third embodiment of the present invention.
第12圖繪示了本發明之第三實施例之第二變化實施例之電濕潤顯示裝置的示意圖。Figure 12 is a schematic view showing an electrowetting display device according to a second modified embodiment of the third embodiment of the present invention.
為使熟習本發明所屬技術領域之一般技藝者能更進一步了解本發明,下文特列舉本發明之較佳實施例,並配合所附圖式,詳細說明本發明的構成內容及所欲達成之功效。The present invention will be further understood by those of ordinary skill in the art to which the present invention pertains. .
請參考第1圖與第2圖。第1圖與第2圖繪示了本發明之第一實施例之電濕潤顯示裝置的示意圖,其中第1圖為第一實施例之電濕潤顯示裝置於暗態顯示模式之示意圖,第2圖為第一實施例之電濕潤顯示裝置於亮態顯示模式之示意圖。如第1圖與第2圖所示,本實施例之電濕潤顯示裝置1具有複數個畫素區10P,且各畫素區10P包括一主動區10A與一畫素周邊區10S。主動區10A係可提供顯示之區域,而畫素周邊區10S則為相鄰之主動區10A之間的區域。電濕潤顯示裝置1包括一第一基板12、複數個第一電極14、一疏水層16、複數個阻隔壁18、一第二基板20、複數個第二電極22、一極性液體24以及一非極性液體26。第一基板12可包括透明基板,其可為硬式透明基板例如玻璃基板或石英基板,或是可撓式透明基板例如塑膠基板,但不以此為限。第一電極14係設置於第一基板12上並分別位於畫素區 10P內。第一電極14可包括透明電極,其材料可為氧化銦錫(ITO)、氧化銦錫(IZO)或其它適合之透明導電材料。第一電極14係為畫素電極,且每一個第一電極14可具有獨立的畫素電壓。電濕潤顯示裝置1可為主動矩陣顯示裝置或被動矩陣顯示裝置,當電濕潤顯示裝置1為主動矩陣顯示裝置,則各第一電極14可與對應的主動開關元件(圖未示)例如薄膜電晶體元件電性連接;當電濕潤顯示裝置1為被動矩陣顯示裝置,則各第一電極14不需與主動開關元件連接,而可直接與訊號線(圖未示)連接。疏水層16係設置於第一電極14上,且疏水層16的材料可為各種具有疏水特性之材料。另外,電濕潤顯示裝置1可選擇性地包括一絕緣層15,設置於第一電極14與疏水層16之間,但不以此為限。阻隔壁18係設置於疏水層16上並分別位於畫素周邊區10S內,且阻隔壁18大體上係環繞主動區10A。阻隔壁18可固定於疏水層16之表面並與疏水層16接觸,且阻隔壁18未與第二電極22接觸。阻隔壁18之材料可為例如光阻或其它絕緣材料。第二基板20係與第一基板12面對設置,且第一基板12與第二基板20可利用設置於邊框區10B的框膠28加以黏著。第二基板20可包括透明基板,其材料可與第一基板12相同,但不以此為限。第二電極22係設置於第二基板20上。精確地說,第一電極14與第二電極22係分別設置於第一基板12與第二基板20的內側表面上。第二電極22係分別位於畫素區10P內,且第二電極22可彼此連接。第二電極22係為一共通電極,其每一個第二電極22可具有相同的共通電壓,但不以此為限。此外,各第二電極22包括一第一子電極部221與一第二子電極部222設置於對應之主動區10A內且彼此電性連接。第一子電極部221與疏水層16具有一第一距離d1,第二子電極部222與疏水層16具有一第二距離d2,且第一距離d1大於第二距離d2。極性液體24與非極性液體26係位於第二電極22與疏水層16之間,極性液體24與非極性液體26彼此不互溶,並可被框膠28封合於第一基板12與第二基板20之間。框膠28可為例如紫外線框膠,或其它各種類型之框膠。詳細地說,極性液體24與非極性液體26係位於主動區10A 內,其中極性液體24大體上會分布於第一基板12與第二基板20之間的空間內,而非極性液體26則大體上會被限制在阻隔壁18所形成的空間內。極性液體24具有極性,其可為例如水或其它具有極性的水性液體,而非極性液體26不具有極性,其可為油墨或其它不具有極性的油性液體。另外,在本實施例中,極性液體24包括一透光液體,其可容許光線穿透,且非極性液體26包括一不透光液體,其可阻擋光線穿透。Please refer to Figure 1 and Figure 2. 1 and 2 are schematic views of an electrowetting display device according to a first embodiment of the present invention, wherein FIG. 1 is a schematic view showing a dark display mode of the electrowetting display device of the first embodiment, FIG. It is a schematic diagram of the electrowetting display device of the first embodiment in a bright state display mode. As shown in FIGS. 1 and 2, the electrowetting display device 1 of the present embodiment has a plurality of pixel regions 10P, and each of the pixel regions 10P includes an active region 10A and a pixel peripheral region 10S. The active area 10A is a display area, and the pixel peripheral area 10S is an area between adjacent active areas 10A. The electrowetting display device 1 includes a first substrate 12, a plurality of first electrodes 14, a hydrophobic layer 16, a plurality of barrier walls 18, a second substrate 20, a plurality of second electrodes 22, a polar liquid 24, and a non- Polar liquid 26. The first substrate 12 may include a transparent substrate, which may be a rigid transparent substrate such as a glass substrate or a quartz substrate, or a flexible transparent substrate such as a plastic substrate, but is not limited thereto. The first electrodes 14 are disposed on the first substrate 12 and respectively located in the pixel area Within 10P. The first electrode 14 may comprise a transparent electrode, the material of which may be indium tin oxide (ITO), indium tin oxide (IZO) or other suitable transparent conductive material. The first electrode 14 is a pixel electrode, and each of the first electrodes 14 may have an independent pixel voltage. The electrowetting display device 1 can be an active matrix display device or a passive matrix display device. When the electrowetting display device 1 is an active matrix display device, each of the first electrodes 14 can be electrically connected to a corresponding active switching element (not shown) such as a thin film. The crystal elements are electrically connected; when the electrowetting display device 1 is a passive matrix display device, the first electrodes 14 do not need to be connected to the active switching elements, but can be directly connected to the signal lines (not shown). The hydrophobic layer 16 is disposed on the first electrode 14, and the material of the hydrophobic layer 16 may be various materials having hydrophobic properties. In addition, the electrowetting display device 1 can optionally include an insulating layer 15 disposed between the first electrode 14 and the hydrophobic layer 16, but is not limited thereto. The barrier wall 18 is disposed on the hydrophobic layer 16 and located in the pixel peripheral region 10S, respectively, and the barrier wall 18 substantially surrounds the active region 10A. The barrier wall 18 can be fixed to the surface of the hydrophobic layer 16 and in contact with the hydrophobic layer 16, and the barrier wall 18 is not in contact with the second electrode 22. The material of the barrier wall 18 can be, for example, a photoresist or other insulating material. The second substrate 20 is disposed to face the first substrate 12, and the first substrate 12 and the second substrate 20 are adhered by the sealant 28 disposed in the frame region 10B. The second substrate 20 may include a transparent substrate, and the material thereof may be the same as that of the first substrate 12, but is not limited thereto. The second electrode 22 is disposed on the second substrate 20. To be precise, the first electrode 14 and the second electrode 22 are disposed on the inner side surfaces of the first substrate 12 and the second substrate 20, respectively. The second electrodes 22 are respectively located in the pixel region 10P, and the second electrodes 22 are connectable to each other. The second electrode 22 is a common electrode, and each of the second electrodes 22 can have the same common voltage, but is not limited thereto. In addition, each of the second electrodes 22 includes a first sub-electrode portion 221 and a second sub-electrode portion 222 disposed in the corresponding active regions 10A and electrically connected to each other. The first sub-electrode portion 221 has a first distance d1 from the hydrophobic layer 16, the second sub-electrode portion 222 and the hydrophobic layer 16 have a second distance d2, and the first distance d1 is greater than the second distance d2. The polar liquid 24 and the non-polar liquid 26 are located between the second electrode 22 and the hydrophobic layer 16, and the polar liquid 24 and the non-polar liquid 26 are mutually immiscible, and can be sealed to the first substrate 12 and the second substrate by the sealant 28. Between 20. The sealant 28 can be, for example, a UV sealant, or other various types of sealant. In detail, the polar liquid 24 and the non-polar liquid 26 are located in the active region 10A. Therein, wherein the polar liquid 24 is substantially distributed in the space between the first substrate 12 and the second substrate 20, and the non-polar liquid 26 is substantially confined within the space formed by the barrier wall 18. The polar liquid 24 has polarity, which may be, for example, water or other polar liquid having polarity, while the non-polar liquid 26 has no polarity, which may be an ink or other oily liquid that does not have polarity. Additionally, in the present embodiment, the polar liquid 24 includes a light transmissive liquid that permits light to pass through, and the non-polar liquid 26 includes an opaque liquid that blocks light from penetrating.
本實施例之電濕潤顯示裝置1可另包括一光源42以及一導光板44。光源42可設置於導光板44之一側,並用以向導光板44發射向光線L,而導光板44係設置於第一基板12之下方,用以將光源42所發射之光線L導向第一基板12。在本實施例中,光源42所發射之光線L係為可見光線,亦即其波長範圍係為人眼可見之光線。舉例而言,光源42可為例如發光二極體元件、螢光燈管或其它類型之發光元件。另外,光源42亦可設置於第一基板12之下方。本實施例之電濕潤顯示裝置1亦可使用環境背光,且在此狀況下則不需使用光源42與導光板44等背光元件。The electrowetting display device 1 of the present embodiment may further include a light source 42 and a light guide plate 44. The light source 42 can be disposed on one side of the light guide plate 44 and used to guide the light guide plate 44 to the light beam L. The light guide plate 44 is disposed under the first substrate 12 for guiding the light L emitted by the light source 42 to the first substrate. 12. In the present embodiment, the light L emitted by the light source 42 is visible light, that is, the wavelength range thereof is light visible to the human eye. For example, light source 42 can be, for example, a light emitting diode element, a fluorescent tube, or other type of light emitting element. In addition, the light source 42 may also be disposed below the first substrate 12 . The electrowetting display device 1 of the present embodiment can also use an environmental backlight, and in this case, it is not necessary to use a backlight element such as the light source 42 and the light guide plate 44.
在本實施例中,第二電極22與疏水層16之間具有兩種不同的間隙,此種不同間隙的設計可以在相同的電壓差下使第一子電極部221與疏水層16之間的壓力不等於第二子電極部222與疏水層16之間的壓力,如此一來可以有效地避免極性液體24與非極性液體26的滯留現象,而可精準地控制極性液體24與非極性液體26在暗態顯示模式與亮態顯示模式下的位置。請參考式1,式1為第二電極22與疏水層16之間的壓力、距離與電壓差的關係。In this embodiment, there are two different gaps between the second electrode 22 and the hydrophobic layer 16. The design of the different gaps can be between the first sub-electrode portion 221 and the hydrophobic layer 16 under the same voltage difference. The pressure is not equal to the pressure between the second sub-electrode portion 222 and the hydrophobic layer 16, so that the retention of the polar liquid 24 and the non-polar liquid 26 can be effectively avoided, and the polar liquid 24 and the non-polar liquid 26 can be precisely controlled. The position in the dark state display mode and the bright state display mode. Referring to Formula 1, Equation 1 is the relationship between the pressure, distance, and voltage difference between the second electrode 22 and the hydrophobic layer 16.
P2-P1=(1/2)*CV2 *((1/d2)-(1/d1))......................................式1其中P1為第一子電極部221與疏水層16之間的壓力; P2為第二子電極部222與疏水層16之間的壓力;V為第一電極14與第二電極22之間的電壓差;d1為第一距離;以及d2為第二距離。P2-P1=(1/2)*CV 2 *((1/d2)-(1/d1))........................ . . . Equation 1 where P1 is the pressure between the first sub-electrode portion 221 and the hydrophobic layer 16; P2 is the pressure between the second sub-electrode portion 222 and the hydrophobic layer 16. V is the voltage difference between the first electrode 14 and the second electrode 22; d1 is the first distance; and d2 is the second distance.
由式1可知,在第一電極14與第二電極22之間的電壓差V相同的情況下,透過改變第一距離d1與第二距離d2的大小關係,即可調整第一子電極部221與疏水層16之間的壓力P1與第二子電極部222與疏水層16之間的壓力P2的關係。如此一來,在驅動電濕潤顯示裝置1時,利用壓力差可更精準且有效地控制極性液體24與非極性液體26在暗態顯示模式與亮態顯示模式下的位置,而改善灰階表現,進而增進顯示品質。As can be seen from Equation 1, when the voltage difference V between the first electrode 14 and the second electrode 22 is the same, the first sub-electrode portion 221 can be adjusted by changing the magnitude relationship between the first distance d1 and the second distance d2. The relationship between the pressure P1 between the hydrophobic layer 16 and the pressure P2 between the second sub-electrode portion 222 and the hydrophobic layer 16. In this way, when the electrowetting display device 1 is driven, the position of the polar liquid 24 and the non-polar liquid 26 in the dark state display mode and the bright state display mode can be controlled more accurately and effectively by using the pressure difference, thereby improving the gray scale performance. , thereby improving display quality.
本實施例之電濕潤顯示裝置1另包括複數個凸塊結構30,分別位於主動區10A內。各凸塊結構30係設置於對應之第二子電極部222與第二基板20之間,但未設置於第一子電極部221與第二基板20之間。因此,相對於第一子電極部221的下表面,第二子電極部222會被凸塊結構30所墊高而突出於第一子電極部221。也就是說,在本實施例中,第一子電極部221與疏水層16之間第一距離d1以及第二子電極部222與疏水層16之間的第二距離d2係藉由於第二子電極部222與第二基板20之間設置凸塊結構30所達成。凸塊結構30之材料可為各式絕緣材料,例如無機絕緣材料像是氧化矽、氮化矽、氧化鋁與氧化鈦等,或者是有機絕緣材料。The electrowetting display device 1 of the present embodiment further includes a plurality of bump structures 30 respectively located in the active region 10A. Each of the bump structures 30 is disposed between the corresponding second sub-electrode portion 222 and the second substrate 20 , but is not disposed between the first sub-electrode portion 221 and the second substrate 20 . Therefore, the second sub-electrode portion 222 is raised by the bump structure 30 and protrudes from the first sub-electrode portion 221 with respect to the lower surface of the first sub-electrode portion 221 . That is, in the present embodiment, the first distance d1 between the first sub-electrode portion 221 and the hydrophobic layer 16 and the second distance d2 between the second sub-electrode portion 222 and the hydrophobic layer 16 are due to the second sub- A bump structure 30 is provided between the electrode portion 222 and the second substrate 20. The material of the bump structure 30 may be various insulating materials, such as inorganic insulating materials such as yttrium oxide, tantalum nitride, aluminum oxide and titanium oxide, or an organic insulating material.
下文將說明本實施例之電濕潤顯示裝置於暗態顯示模式與亮態顯示模式下的操作條件。值得說明的是,暗態顯示模式或亮態顯示模式係指單一畫素的顯示模式,也就是說,每一個畫素可視所欲顯示的畫面而獨立地被控制為暗態顯示模式或亮態顯示模式。The operating conditions of the electrowetting display device of the present embodiment in the dark state display mode and the bright state display mode will be described below. It should be noted that the dark state display mode or the bright state display mode refers to a single pixel display mode, that is, each pixel can be independently controlled to a dark state display mode or a bright state depending on the picture to be displayed. Display mode.
如第1圖所示,於暗態顯示模式下,第一電極14與第二電極22之間無電壓差存在,也就是說,第一電極14的畫素電壓與第二電極22之共通電壓會相等。在此狀況下,極性液體24(透光液體)會與疏水層16排斥,而非極性液體26(不透光液體)會吸附在疏水層16的表面而完全覆蓋主動區10A,因此可遮蔽由導光板44射出之光線L而達到暗態顯示效果。As shown in FIG. 1, in the dark state display mode, there is no voltage difference between the first electrode 14 and the second electrode 22, that is, the pixel voltage of the first electrode 14 and the common voltage of the second electrode 22. Will be equal. In this case, the polar liquid 24 (light-transmitting liquid) repels the hydrophobic layer 16, and the non-polar liquid 26 (opaque liquid) adsorbs on the surface of the hydrophobic layer 16 to completely cover the active region 10A, so that it can be shielded by The light L emitted from the light guide plate 44 reaches a dark state display effect.
如第2圖所示,於亮態顯示模式下,第一電極14與第二電極22之間存在一電場,也就是說,第一電極14的畫素電壓與第二電極22之共通電壓不相等而具有電壓差。在此狀況下,非極性液體26(不透光液體)會受電濕潤力的推擠而移動至阻隔壁18之一側而僅部分覆蓋主動區10A,且極性液體24(透光液體)會因為表面能的改變而覆蓋部分主動區10A。因此,由導光板44射出之光線L(可見光線)可以穿過極性液體24(透光液體)而達到亮態顯示效果。於亮態顯示模式下,各畫素區10P的灰階值(亮度)可利用第一電極14的畫素電壓與第二電極22之共通電壓的電壓差的大小加以控制,也就是說,當電壓差愈大時,灰階值愈大;當電壓差愈小時,灰階值愈小。此外,由於各畫素區10P的第一電極14的畫素電壓為獨立控制,因此可分別顯示出預定的灰階值。As shown in FIG. 2, in the bright state display mode, an electric field exists between the first electrode 14 and the second electrode 22, that is, the pixel voltage of the first electrode 14 and the common voltage of the second electrode 22 are not Equal and have a voltage difference. Under this condition, the non-polar liquid 26 (opaque liquid) may be pushed to one side of the barrier wall 18 by the pushing of the electric wetting force to partially cover the active region 10A, and the polar liquid 24 (light transmitting liquid) may be The surface energy changes to cover part of the active area 10A. Therefore, the light L (visible light) emitted from the light guide plate 44 can pass through the polar liquid 24 (light transmitting liquid) to achieve a bright state display effect. In the bright state display mode, the grayscale value (brightness) of each pixel region 10P can be controlled by the magnitude of the voltage difference between the pixel voltage of the first electrode 14 and the common voltage of the second electrode 22, that is, when The larger the voltage difference is, the larger the gray scale value is; the smaller the voltage difference is, the smaller the gray scale value is. Further, since the pixel voltages of the first electrodes 14 of the respective pixel regions 10P are independently controlled, predetermined gray scale values can be respectively displayed.
本實施例之電濕潤顯示裝置1可以提供黑白顯示功能、單色顯示功能或是全彩顯示功能。舉例而言,若欲提供黑白顯示功能,則光源42所發出之光線L可選用白光。若欲提供單色顯示功能,則光源42所發出之光線L可選用單色光例如紅光、綠光或藍光。若欲提供全彩顯示功能,則光源42可選用掃描式光源,其可依序發出不同顏色之光線L例如依序發出紅光、綠光與藍光;或者,光源42所發出之光線L可選用白光,並於不同的畫素區10P內分別設置不同顏色的彩色濾光片(圖未示)。The electrowetting display device 1 of the embodiment can provide a black and white display function, a monochrome display function or a full color display function. For example, if a black and white display function is to be provided, the light L emitted by the light source 42 may be white light. If a monochrome display function is to be provided, the light L emitted from the light source 42 may be monochromatic light such as red light, green light or blue light. If the full color display function is to be provided, the light source 42 may select a scanning light source, which may sequentially emit different colors of light L, for example, sequentially emitting red light, green light and blue light; or the light L emitted by the light source 42 may be selected. White light, and color filters of different colors (not shown) are respectively disposed in different pixel regions 10P.
本發明之電濕潤顯示裝置並不以上述實施例為限。下文將依序介紹本發明之其它較佳實施例之電濕潤顯示裝置,且為了便於比較各實施例之相異處並簡化說明,在下文之各實施例中使用相同的符號標注相同的元件,且主要針對各實施例之相異處進行說明,而不再對重覆部分進行贅述。The electrowetting display device of the present invention is not limited to the above embodiment. The electrowetting display device of the other preferred embodiments of the present invention will be described in order below, and the same symbols are used to denote the same components in the following embodiments in order to facilitate the comparison of the different embodiments and simplify the description. The description of the differences between the embodiments will be mainly made, and the repeated parts will not be described again.
請參考第3圖。第3圖繪示了本發明之第一實施例之第一變化實施例之電濕潤顯示裝置的示意圖。如第3圖所示,在第一變化實施例之電濕潤顯示裝置1’中,各第二子電極部222包括一主電極部222M與一輔助電極部222A。第二子電極部222之主電極部222M與第一子電極部221係由同一層圖案化透明導電層所構成,各輔助電極部222A係設置於對應之主電極部222M與疏水層16之間。因此,相對於第一子電極部221的下表面,輔助電極部222A會突出於第一子電極部221。也就是說,在第一變化實施例中,第一子電極部221與疏水層16之間第一距離d1以及第二子電極部222與疏水層16之間的第二距離d2係藉由於第二子電極部222的輔助電極部222A所達成。第一變化實施例之電濕潤顯示裝置1’的暗態顯示模式與亮態顯示模式的操作方式與第一實施例相同,在此不多加贅述。Please refer to Figure 3. FIG. 3 is a schematic view showing an electrowetting display device according to a first variation of the first embodiment of the present invention. As shown in Fig. 3, in the electrowetting display device 1' of the first modified embodiment, each of the second sub-electrode portions 222 includes a main electrode portion 222M and an auxiliary electrode portion 222A. The main electrode portion 222M of the second sub-electrode portion 222 and the first sub-electrode portion 221 are formed of the same layer of patterned transparent conductive layer, and each auxiliary electrode portion 222A is disposed between the corresponding main electrode portion 222M and the hydrophobic layer 16. . Therefore, the auxiliary electrode portion 222A protrudes from the first sub-electrode portion 221 with respect to the lower surface of the first sub-electrode portion 221 . That is, in the first variant embodiment, the first distance d1 between the first sub-electrode portion 221 and the hydrophobic layer 16 and the second distance d2 between the second sub-electrode portion 222 and the hydrophobic layer 16 are The auxiliary electrode portion 222A of the two sub-electrode portions 222 is achieved. The operation mode of the dark state display mode and the bright state display mode of the electrowetting display device 1' of the first modified embodiment is the same as that of the first embodiment, and will not be further described herein.
請參考第4圖。第4圖繪示了本發明之第一實施例之第二變化實施例之電濕潤顯示裝置的示意圖。如第4圖所示,不同於第一變化實施例,在第二變化實施例之電濕潤顯示裝置1”中,各輔助電極部222A包括複數個輔助電極層S1,S2,S3,堆疊於對應之主電極部222M與疏水層16之間。輔助電極層S1,S2,S3的面積不同,例如其面積為遞減方式排列。也就是說,靠近疏水層16之輔助電極層S3之面積係小於輔助電極層S2的面積,且輔助電極層S2的面積小於靠近主電極部222M之輔助電極層S1之面積。同樣地,第一子電極部221與疏水層16之間第一距離d1以及第二子電極部222與疏 水層16之間的第二距離d2係藉由於具有多層堆疊結構的輔助電極部222A所達成。第二變化實施例之電濕潤顯示裝置1”的暗態顯示模式與亮態顯示模式的操作方式與第一實施例相同,在此不多加贅述。Please refer to Figure 4. Fig. 4 is a schematic view showing an electrowetting display device according to a second modified embodiment of the first embodiment of the present invention. As shown in FIG. 4, unlike the first variation embodiment, in the electrowetting display device 1" of the second variation embodiment, each of the auxiliary electrode portions 222A includes a plurality of auxiliary electrode layers S1, S2, S3 stacked in correspondence. The main electrode portion 222M is disposed between the main electrode portion 222M and the hydrophobic layer 16. The area of the auxiliary electrode layers S1, S2, and S3 is different, for example, the area thereof is arranged in a decreasing manner. That is, the area of the auxiliary electrode layer S3 adjacent to the hydrophobic layer 16 is smaller than the auxiliary portion. The area of the electrode layer S2, and the area of the auxiliary electrode layer S2 is smaller than the area of the auxiliary electrode layer S1 adjacent to the main electrode portion 222M. Similarly, the first distance d1 between the first sub-electrode portion 221 and the hydrophobic layer 16 and the second sub- Electrode portion 222 and sparse The second distance d2 between the water layers 16 is achieved by the auxiliary electrode portion 222A having a multilayer stacked structure. The operation mode of the dark state display mode and the bright state display mode of the electrowetting display device 1" of the second modified embodiment is the same as that of the first embodiment, and will not be further described herein.
請參考第5圖與第6圖。第5圖與第6圖繪示了本發明之第二實施例之電濕潤顯示裝置的示意圖,其中第5圖為第二實施例之電濕潤顯示裝置於亮態顯示模式之示意圖,第6圖為第二實施例之電濕潤顯示裝置於暗態顯示模式之示意圖。如第5圖與第6圖所示,不同於第一實施例,本實施例之電濕潤顯示裝置2另包括複數個遮光圖案32,分別設置於主動區10A內,且各遮光圖案32僅部分覆蓋對應之主動區10A而部分暴露出對應之主動區10A。遮光圖案32可以阻擋光線L,此外,光源42所發出之光線L可為不可見光線。另外,不同於第一實施例,在第二實施例中,極性液體24包括一透光液體,且非極性液體26包括一波長轉換液體,其中非極性液體26之折射率大於或等於疏水層16之折射率,且極性液體24之折射率小於疏水層16之折射率。舉例而言,非極性液體26與疏水層16之折射率差可介於0.1至1之間,但不以此為限。另外,在本實施例中,第一子電極部221與疏水層16之間第一距離d1以及第二子電極部222與疏水層16之間的第二距離d2係藉由於第二子電極部222與第二基板20之間設置凸塊結構30所達成,但不以此為限。Please refer to Figure 5 and Figure 6. 5 and 6 are schematic views of an electrowetting display device according to a second embodiment of the present invention, wherein FIG. 5 is a schematic view showing the electrowetting display device of the second embodiment in a bright state display mode, FIG. It is a schematic diagram of the electrowetting display device of the second embodiment in a dark state display mode. As shown in FIG. 5 and FIG. 6 , the electrowetting display device 2 of the present embodiment further includes a plurality of light shielding patterns 32 respectively disposed in the active region 10A, and each of the light shielding patterns 32 is only partially partially different from the first embodiment. The corresponding active area 10A is partially covered and the corresponding active area 10A is partially exposed. The light shielding pattern 32 can block the light L. Further, the light L emitted by the light source 42 can be an invisible light. In addition, unlike the first embodiment, in the second embodiment, the polar liquid 24 includes a light transmissive liquid, and the non-polar liquid 26 includes a wavelength converting liquid, wherein the non-polar liquid 26 has a refractive index greater than or equal to the hydrophobic layer 16. The refractive index, and the refractive index of the polar liquid 24 is smaller than the refractive index of the hydrophobic layer 16. For example, the difference in refractive index between the non-polar liquid 26 and the hydrophobic layer 16 may be between 0.1 and 1, but not limited thereto. In addition, in the embodiment, the first distance d1 between the first sub-electrode portion 221 and the hydrophobic layer 16 and the second distance d2 between the second sub-electrode portion 222 and the hydrophobic layer 16 are due to the second sub-electrode portion. The bump structure 30 is disposed between the 222 and the second substrate 20, but is not limited thereto.
如第5圖所示,於亮態顯示模式下,第一電極14與第二電極22之間無電壓差存在,也就是說,第一電極14的畫素電壓與第二電極22之共通電壓會相等。在此狀況下,極性液體24(透光液體)會與疏水層16排斥,而非極性液體26(波長轉換液體)會吸附在疏水層16的表面而完全覆蓋主動區10A。由於非極性液體26之折射率大於或等於疏水層16之折射率,因此光線L會以直接穿透或折射的形式進入並穿透非極性液體26(波長轉換液體), 並激發波長轉換液體而形成一可見光線L’,且由於非極性液體26與極性液體24的界面為曲面,因此可見光線L’仍可穿透極性液體24而達到亮態顯示效果。舉例而言,本實施例之電濕潤顯示裝置2之畫素區10P可以包括複數個不同顏色的畫素區10P,例如紅色畫素區、綠色畫素區與藍色畫素區,且在紅色畫素區、綠色畫素區與藍色畫素區內,彩色波長轉換液體分別為紅色發光液體、綠色發光液體與藍色發光液體,因此可以提供全彩顯示功能。另外,於亮態顯示模式下,各畫素區10P的灰階值(亮度)可利用第一電極14的畫素電壓與第二電極22之共通電壓的電壓差的大小加以控制,也就是說,當電壓差愈大時,灰階值愈小;當電壓差愈小時,灰階值愈大。此外,由於各畫素區10P的第一電極14的畫素電壓為獨立控制,因此可分別顯示出預定的灰階值。As shown in FIG. 5, in the bright state display mode, there is no voltage difference between the first electrode 14 and the second electrode 22, that is, the pixel voltage of the first electrode 14 and the common voltage of the second electrode 22. Will be equal. In this case, the polar liquid 24 (light transmitting liquid) repels the hydrophobic layer 16, and the non-polar liquid 26 (wavelength converting liquid) adsorbs on the surface of the hydrophobic layer 16 to completely cover the active region 10A. Since the refractive index of the non-polar liquid 26 is greater than or equal to the refractive index of the hydrophobic layer 16, the light L enters and penetrates the non-polar liquid 26 (wavelength converting liquid) in a form of direct penetration or refraction. The wavelength conversion liquid is excited to form a visible light line L', and since the interface between the non-polar liquid 26 and the polar liquid 24 is curved, the visible light line L' can still penetrate the polar liquid 24 to achieve a bright display effect. For example, the pixel region 10P of the electrowetting display device 2 of the present embodiment may include a plurality of pixel regions 10P of different colors, such as a red pixel region, a green pixel region, and a blue pixel region, and are in red. In the pixel area, the green pixel area and the blue pixel area, the color wavelength conversion liquids are respectively a red light-emitting liquid, a green light-emitting liquid and a blue light-emitting liquid, so that a full-color display function can be provided. In addition, in the bright state display mode, the grayscale value (brightness) of each pixel region 10P can be controlled by the magnitude of the voltage difference between the pixel voltage of the first electrode 14 and the common voltage of the second electrode 22, that is, When the voltage difference is larger, the gray scale value is smaller; when the voltage difference is smaller, the gray scale value is larger. Further, since the pixel voltages of the first electrodes 14 of the respective pixel regions 10P are independently controlled, predetermined gray scale values can be respectively displayed.
如第6圖所示,於暗態顯示模式下,第一電極14與第二電極22之間存在一電場,也就是說,第一電極14的畫素電壓與第二電極22之共通電壓不相等而具有電壓差。在此狀況下,非極性液體26(波長轉換液體)會受電濕潤力的擠壓而移動至遮光圖案32上,而極性液體24(透光液體)會因為表面能的改變而覆蓋部分主動區10A。極性液體24(透光液體)會阻擋光線L而提供暗態顯示效果。在本實施例中,由於極性液體24之折射率小於疏水層16之折射率,因此由導光板44射出之光線L(不可見光線)會因為全反射效應被極性液體24(透光液體)所反射而無法穿透極性液體24(透光液體)。也就是說,在暗態顯示模式下,光線L(不可見光線)不僅無法穿透遮光圖案32,亦因為全反射效應而無法穿透極性液體24(透光液體),因此未激發波長轉換液體而可達到不發光的暗態顯示效果。As shown in FIG. 6, in the dark state display mode, an electric field exists between the first electrode 14 and the second electrode 22, that is, the pixel voltage of the first electrode 14 and the common voltage of the second electrode 22 are not Equal and have a voltage difference. In this case, the non-polar liquid 26 (wavelength converting liquid) is pressed by the electric wetting force to move onto the light shielding pattern 32, and the polar liquid 24 (light transmitting liquid) covers a part of the active area 10A due to the change in surface energy. . The polar liquid 24 (light-transmissive liquid) blocks the light L and provides a dark display. In the present embodiment, since the refractive index of the polar liquid 24 is smaller than the refractive index of the hydrophobic layer 16, the light L (invisible light) emitted from the light guide plate 44 is affected by the polar liquid 24 (light transmitting liquid) due to the total reflection effect. Reflected and unable to penetrate the polar liquid 24 (light transmitting liquid). That is to say, in the dark state display mode, the light L (invisible light line) can not only penetrate the light shielding pattern 32, but also cannot penetrate the polar liquid 24 (light transmitting liquid) due to the total reflection effect, so the wavelength conversion liquid is not excited. It can achieve a dark state display effect that does not emit light.
請參考第7圖。第7圖繪示了本發明之第二實施例之第一變化實施例之電濕潤顯示裝置的示意圖。如第7圖所示,在第一變化實施例之電濕 潤顯示裝置2’中,各第二子電極部222包括一主電極部222M與一輔助電極部222A。第二子電極部222之主電極部222M係與第一子電極部221係由同一層圖案化透明導電層所構成,各輔助電極部222A係設置於對應之主電極部222M與疏水層16之間。因此,相對於第一子電極部221的下表面,輔助電極部222A會突出於第一子電極部221。也就是說,在第一變化實施例中,第一子電極部221與疏水層16之間第一距離d1以及第二子電極部222與疏水層16之間的第二距離d2係藉由於第二子電極部222的輔助電極部222A所達成。第一變化實施例之電濕潤顯示裝置2’的暗態顯示模式與亮態顯示模式的操作方式與第二實施例相同,在此不多加贅述。Please refer to Figure 7. FIG. 7 is a schematic view showing an electrowetting display device according to a first variation of the second embodiment of the present invention. As shown in Fig. 7, the electrowetting in the first variation embodiment In the display device 2', each of the second sub-electrode portions 222 includes a main electrode portion 222M and an auxiliary electrode portion 222A. The main electrode portion 222M of the second sub-electrode portion 222 and the first sub-electrode portion 221 are formed of the same layer of patterned transparent conductive layer, and each of the auxiliary electrode portions 222A is disposed between the corresponding main electrode portion 222M and the hydrophobic layer 16 between. Therefore, the auxiliary electrode portion 222A protrudes from the first sub-electrode portion 221 with respect to the lower surface of the first sub-electrode portion 221 . That is, in the first variant embodiment, the first distance d1 between the first sub-electrode portion 221 and the hydrophobic layer 16 and the second distance d2 between the second sub-electrode portion 222 and the hydrophobic layer 16 are The auxiliary electrode portion 222A of the two sub-electrode portions 222 is achieved. The operation mode of the dark state display mode and the bright state display mode of the electrowetting display device 2' of the first modified embodiment is the same as that of the second embodiment, and will not be further described herein.
請參考第8圖。第8圖繪示了本發明之第二實施例之第二變化實施例之電濕潤顯示裝置的示意圖。如第8圖所示,不同於第一變化實施例,在第二變化實施例之電濕潤顯示裝置2”中,各輔助電極部222A包括複數個輔助電極層S1,S2,S3,堆疊於對應之主電極部222M與疏水層16之間。輔助電極層S1,S2,S3的面積不同,例如其面積為遞減方式排列。也就是說,靠近疏水層16之輔助電極層S3之面積係小於輔助電極層S2的面積,且輔助電極層S2的面積小於靠近主電極部222M之輔助電極層S1之面積。同樣地,第一子電極部221與疏水層16之間第一距離d1以及第二子電極部222與疏水層16之間的第二距離d2係藉由於具有多層堆疊結構的輔助電極部222A所達成。第二變化實施例之電濕潤顯示裝置2”的暗態顯示模式與亮態顯示模式的操作方式與第二實施例相同,在此不多加贅述。Please refer to Figure 8. FIG. 8 is a schematic view showing an electrowetting display device according to a second variation of the second embodiment of the present invention. As shown in FIG. 8, unlike the first variation embodiment, in the electrowetting display device 2" of the second variation embodiment, each of the auxiliary electrode portions 222A includes a plurality of auxiliary electrode layers S1, S2, S3 stacked in correspondence. The main electrode portion 222M is disposed between the main electrode portion 222M and the hydrophobic layer 16. The area of the auxiliary electrode layers S1, S2, and S3 is different, for example, the area thereof is arranged in a decreasing manner. That is, the area of the auxiliary electrode layer S3 adjacent to the hydrophobic layer 16 is smaller than the auxiliary portion. The area of the electrode layer S2, and the area of the auxiliary electrode layer S2 is smaller than the area of the auxiliary electrode layer S1 adjacent to the main electrode portion 222M. Similarly, the first distance d1 between the first sub-electrode portion 221 and the hydrophobic layer 16 and the second sub- The second distance d2 between the electrode portion 222 and the hydrophobic layer 16 is achieved by the auxiliary electrode portion 222A having a multi-layer stack structure. The dark state display mode and the bright state display of the electrowetting display device 2" of the second modified embodiment The operation mode of the mode is the same as that of the second embodiment, and will not be described here.
請參考第9圖與第10圖。第9圖與第10圖繪示了本發明之第三實施例之電濕潤顯示裝置的示意圖,其中第9圖為第三實施例之電濕潤顯示裝置於亮態顯示模式之示意圖,第10圖為第三實施例之電濕潤顯示裝置於暗態顯示模式之示意圖。如第9圖與第10圖所示,不同於第一與第二實施例, 本實施例之電濕潤顯示裝置3包括一波長轉換層34,設置於第二基板20上。此外,光源42所發出之光線L可為不可見光線,極性液體24包括透光液體,且非極性液體26包括透光液體,其中非極性液體26之折射率大於或等於疏水層16之折射率,且極性液體24之折射率小於疏水層16之折射率。舉例而言,非極性液體26與疏水層16之折射率差可介於0.1至1之間,但不以此為限。Please refer to Figure 9 and Figure 10. 9 and 10 are schematic views of an electrowetting display device according to a third embodiment of the present invention, wherein FIG. 9 is a schematic view showing the electrowetting display device of the third embodiment in a bright state display mode, FIG. It is a schematic diagram of the electrowetting display device of the third embodiment in a dark state display mode. As shown in FIGS. 9 and 10, unlike the first and second embodiments, The electrowetting display device 3 of the present embodiment includes a wavelength conversion layer 34 disposed on the second substrate 20. In addition, the light L emitted by the light source 42 may be an invisible light, the polar liquid 24 includes a light transmitting liquid, and the non-polar liquid 26 includes a light transmitting liquid, wherein the refractive index of the non-polar liquid 26 is greater than or equal to the refractive index of the hydrophobic layer 16. And the refractive index of the polar liquid 24 is smaller than the refractive index of the hydrophobic layer 16. For example, the difference in refractive index between the non-polar liquid 26 and the hydrophobic layer 16 may be between 0.1 and 1, but not limited thereto.
如第9圖所示,於亮態顯示模式下,第一電極14與第二電極22之間無電壓差存在,也就是說,第一電極14的畫素電壓與第二電極22之共通電壓會相等。在此狀況下,極性液體24會與疏水層16排斥,而非極性液體26會吸附在疏水層16的表面而完全覆蓋主動區10A,由於非極性液體26之折射率大於或等於疏水層16之折射率,因此光線L會以直接穿透或折射的形式進入並穿透非極性液體26(透光液體),且由於非極性液體26與極性液體24的界面為曲面,因此可見光線L’仍可穿透極性液體24並激發波長轉換層34而形成一可見光線L’,達到亮態顯示效果。本實施例之電濕潤顯示裝置3之畫素區10P可以包括複數個不同顏色的畫素區10P,例如紅色畫素區、綠色畫素區與藍色畫素區,且在紅色畫素區、綠色畫素區與藍色畫素區內,波長轉換層34可選擇不同材料的波長轉換層,例如紅光發光層、綠光發光層與藍光發光層,其可分別受到不可見光線的激發而產生紅光、綠光與藍光,因此可以提供全彩顯示功能。另外,在一變化實施例中,光源42所發出之光線L亦可為具有短波長的可見光線,例如藍光。在此狀況下,藍色畫素區可不設置波長轉換層34,而在紅色畫素區與綠色畫素區與藍色畫素區內,波長轉換層34可選擇不同材料的波長轉換層,例如紅光發光層與綠光發光層,其可分別受到短波長的藍光的激發而產生紅光與綠光。藉由上述作法,同樣可以提供全彩顯示功能。另外,於亮態顯示模式下,各畫素區10P的灰階值(亮度)可利用第一電極14的畫素電壓與第二電極22之共通電壓的電壓差的大小加 以控制,也就是說,當電壓差愈小時,灰階值愈大;當電壓差愈大時,灰階值愈小。此外,由於各畫素區10P的第一電極14的畫素電壓為獨立控制,因此可分別顯示出預定的灰階值。As shown in FIG. 9, in the bright state display mode, there is no voltage difference between the first electrode 14 and the second electrode 22, that is, the pixel voltage of the first electrode 14 and the common voltage of the second electrode 22. Will be equal. In this case, the polar liquid 24 will repel the hydrophobic layer 16, and the non-polar liquid 26 will adsorb on the surface of the hydrophobic layer 16 to completely cover the active region 10A, since the refractive index of the non-polar liquid 26 is greater than or equal to that of the hydrophobic layer 16. The refractive index, therefore, the light L enters and penetrates the non-polar liquid 26 (translucent liquid) in a form of direct penetration or refraction, and since the interface between the non-polar liquid 26 and the polar liquid 24 is curved, the visible light L' remains The polar liquid 24 can be penetrated and the wavelength conversion layer 34 is excited to form a visible light line L' to achieve a bright state display effect. The pixel region 10P of the electrowetting display device 3 of the present embodiment may include a plurality of pixel regions 10P of different colors, such as a red pixel region, a green pixel region, and a blue pixel region, and in the red pixel region, In the green pixel region and the blue pixel region, the wavelength conversion layer 34 may select wavelength conversion layers of different materials, such as a red light emitting layer, a green light emitting layer and a blue light emitting layer, which may be respectively excited by invisible light lines. Produces red, green and blue light, so full color display is available. In addition, in a variant embodiment, the light L emitted by the light source 42 may also be a visible light having a short wavelength, such as blue light. In this case, the blue pixel region may not be provided with the wavelength conversion layer 34, and in the red pixel region and the green pixel region and the blue pixel region, the wavelength conversion layer 34 may select a wavelength conversion layer of a different material, for example, The red light emitting layer and the green light emitting layer are respectively excited by short-wavelength blue light to generate red light and green light. By the above method, a full color display function can also be provided. In addition, in the bright state display mode, the grayscale value (brightness) of each pixel region 10P can be increased by the voltage difference between the pixel voltage of the first electrode 14 and the common voltage of the second electrode 22. To control, that is, when the voltage difference is smaller, the gray scale value is larger; when the voltage difference is larger, the gray scale value is smaller. Further, since the pixel voltages of the first electrodes 14 of the respective pixel regions 10P are independently controlled, predetermined gray scale values can be respectively displayed.
如第10圖所示,於暗態顯示模式下,第一電極14與第二電極22之間存在一電場,也就是說,第一電極14的畫素電壓與第二電極22之共通電壓不相等而具有電壓差。在此狀況下,非極性液體26會受電濕潤力的推擠而移動至阻隔壁18之一側而僅部分覆蓋主動區10A,且極性液體24會因為表面能的改變而覆蓋部分主動區10A。極性液體24會阻擋光線L而提供暗態顯示效果。在本實施例中,由於極性液體24之折射率小於疏水層16之折射率,因此由導光板44射出之光線L會因為全反射效應被極性液體24所反射而無法穿透極性液體24。As shown in FIG. 10, in the dark state display mode, an electric field exists between the first electrode 14 and the second electrode 22, that is, the pixel voltage of the first electrode 14 and the common voltage of the second electrode 22 are not Equal and have a voltage difference. Under this condition, the non-polar liquid 26 is pushed to one side of the barrier wall 18 by the pushing of the electric wetting force to partially cover the active region 10A, and the polar liquid 24 covers the partial active region 10A due to the change in surface energy. The polar liquid 24 blocks the light L to provide a dark display. In the present embodiment, since the refractive index of the polar liquid 24 is smaller than the refractive index of the hydrophobic layer 16, the light L emitted from the light guide plate 44 is reflected by the polar liquid 24 due to the total reflection effect and cannot penetrate the polar liquid 24.
請參考第11圖。第11圖繪示了本發明之第三實施例之第一變化實施例之電濕潤顯示裝置的示意圖。如第11圖所示,在第一變化實施例之電濕潤顯示裝置3’中,各第二子電極部222包括一主電極部222M與一輔助電極部222A。第二子電極部222之主電極部222M與第一子電極部221係由同一層圖案化透明導電層所構成,各輔助電極部222A係設置於對應之主電極部222M與疏水層16之間。因此,相對於第一子電極部221的下表面,輔助電極部222A會突出於第一子電極部221。也就是說,在第一變化實施例中,第一子電極部221與疏水層16之間第一距離d1以及第二子電極部222與疏水層16之間的第二距離d2係藉由於第二子電極部222的輔助電極部222A所達成。第一變化實施例之電濕潤顯示裝置3’的暗態顯示模式與亮態顯示模式的操作方式與第三實施例相同,在此不多加贅述。Please refer to Figure 11. 11 is a schematic view showing an electrowetting display device according to a first variation of the third embodiment of the present invention. As shown in Fig. 11, in the electrowetting display device 3' of the first modified embodiment, each of the second sub-electrode portions 222 includes a main electrode portion 222M and an auxiliary electrode portion 222A. The main electrode portion 222M of the second sub-electrode portion 222 and the first sub-electrode portion 221 are formed of the same layer of patterned transparent conductive layer, and each auxiliary electrode portion 222A is disposed between the corresponding main electrode portion 222M and the hydrophobic layer 16. . Therefore, the auxiliary electrode portion 222A protrudes from the first sub-electrode portion 221 with respect to the lower surface of the first sub-electrode portion 221 . That is, in the first variant embodiment, the first distance d1 between the first sub-electrode portion 221 and the hydrophobic layer 16 and the second distance d2 between the second sub-electrode portion 222 and the hydrophobic layer 16 are The auxiliary electrode portion 222A of the two sub-electrode portions 222 is achieved. The operation mode of the dark state display mode and the bright state display mode of the electrowetting display device 3' of the first modified embodiment is the same as that of the third embodiment, and will not be further described herein.
請參考第12圖。第12圖繪示了本發明之第三實施例之第二變化 實施例之電濕潤顯示裝置的示意圖。如第4圖所示,不同於第一變化實施例,在第二變化實施例之電濕潤顯示裝置3”中,各輔助電極部222A包括複數個輔助電極層S1,S2,S3,堆疊於對應之主電極部222M與疏水層16之間。輔助電極層S1,S2,S3的面積不同,例如其面積為遞減方式排列。也就是說,靠近疏水層16之輔助電極層S3之面積係小於輔助電極層S2的面積,且輔助電極層S2的面積小於靠近主電極部222M之輔助電極層S1之面積。同樣地,第一子電極部221與疏水層16之間第一距離d1以及第二子電極部222與疏水層16之間的第二距離d2係藉由於具有多層堆疊結構的輔助電極部222A所達成。第二變化實施例之電濕潤顯示裝置3”的暗態顯示模式與亮態顯示模式的操作方式與第三實施例相同,在此不多加贅述。Please refer to Figure 12. Figure 12 is a diagram showing a second variation of the third embodiment of the present invention. A schematic view of an electrowetting display device of an embodiment. As shown in FIG. 4, unlike the first variation embodiment, in the electrowetting display device 3" of the second variation embodiment, each of the auxiliary electrode portions 222A includes a plurality of auxiliary electrode layers S1, S2, S3 stacked in correspondence. The main electrode portion 222M is disposed between the main electrode portion 222M and the hydrophobic layer 16. The area of the auxiliary electrode layers S1, S2, and S3 is different, for example, the area thereof is arranged in a decreasing manner. That is, the area of the auxiliary electrode layer S3 adjacent to the hydrophobic layer 16 is smaller than the auxiliary portion. The area of the electrode layer S2, and the area of the auxiliary electrode layer S2 is smaller than the area of the auxiliary electrode layer S1 adjacent to the main electrode portion 222M. Similarly, the first distance d1 between the first sub-electrode portion 221 and the hydrophobic layer 16 and the second sub- The second distance d2 between the electrode portion 222 and the hydrophobic layer 16 is achieved by the auxiliary electrode portion 222A having a multi-layer stacked structure. The dark state display mode and the bright state display of the electrowetting display device 3" of the second modified embodiment The operation mode of the mode is the same as that of the third embodiment, and will not be described here.
綜上所述,本發明之電濕潤顯示裝置的第二電極與第一電極之間具有兩種不同的間隙,因此可以精準且有效地控制極性液體與非極性液體在暗態顯示模式與亮態顯示模式下的位置,而改善灰階表現,進而增進顯示品質。In summary, the second electrode of the electrowetting display device of the present invention has two different gaps between the second electrode and the first electrode, so that the polar liquid and the non-polar liquid can be accurately and effectively controlled in the dark state display mode and the bright state. Improve the display quality by improving the grayscale performance in the display mode.
以上所述僅為本發明之較佳實施例,凡依本發明申請專利範圍所做之均等變化與修飾,皆應屬本發明之涵蓋範圍。The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.
1‧‧‧電濕潤顯示裝置1‧‧‧Electric humidification display device
10P‧‧‧畫素區10P‧‧‧Photo District
10A‧‧‧主動區10A‧‧‧Active Area
10S‧‧‧畫素周邊區10S‧‧‧ pixels surrounding area
12‧‧‧第一基板12‧‧‧First substrate
14‧‧‧第一電極14‧‧‧First electrode
16‧‧‧疏水層16‧‧‧hydrophobic layer
18‧‧‧阻隔壁18‧‧‧ blocking wall
20‧‧‧第二基板20‧‧‧second substrate
22‧‧‧第二電極22‧‧‧second electrode
24‧‧‧極性液體24‧‧‧Polar liquid
26‧‧‧非極性液體26‧‧‧Non-polar liquid
15‧‧‧絕緣層15‧‧‧Insulation
10B‧‧‧邊框區10B‧‧‧Border area
28‧‧‧框膠28‧‧‧Box glue
221‧‧‧第一子電極部221‧‧‧First sub-electrode
222‧‧‧第二子電極部222‧‧‧Second sub-electrode
d1‧‧‧第一距離D1‧‧‧first distance
d2‧‧‧第二距離D2‧‧‧Second distance
42‧‧‧光源42‧‧‧Light source
44‧‧‧導光板44‧‧‧Light guide plate
L‧‧‧光線L‧‧‧Light
20‧‧‧凸塊結構20‧‧‧Bump structure
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CN103809283B (en) | 2014-02-12 | 2015-11-11 | 北京京东方显示技术有限公司 | The manufacture method of a kind of grating, display device and grating |
CN104330891A (en) * | 2014-10-22 | 2015-02-04 | 深圳市华星光电技术有限公司 | Electrowetting display panel and electrowetting display device |
CN104658431B (en) | 2015-03-11 | 2017-12-15 | 京东方科技集团股份有限公司 | Display panel and the display device including the display panel |
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