TW200944886A - Transflective display unit and driving method thereof - Google Patents

Abstract

A transflective display unit and the driving method thereof are provided. The transflective display unit includes a first reflecting region and a transmitting region, wherein the transmitting region includes a second reflecting region. The region ratio between the first reflecting region and the transmitting region is adjusted so as to the reflecting rate accords with a curve related the transmitting rate vary with a driving voltage.

Description

200944886

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a transflective display, and more particularly to a display unit for a transflective display having the same liquid crystal thickness. [Prior Art]

Generally, liquid crystal displays can be classified into three types: transmissive, reflective, and transflective. The transflective liquid crystal display can be used in both light and low light, so it can be applied in a wide range.

In a bull's-eye reverse liquid crystal display, it is usually divided into a transmissive area and a reflective area in one element. The light source in the penetrating zone comes from the backlight, and the light source in the reflecting zone comes from ambient light. When a voltage is applied to the liquid crystal layer, the retardation amount of the liquid crystal layer to the phase is changed, and then there is a change in brightness and darkness through the polarizing plate. Since the transmission distance of the light in the liquid crystal layer of the reflection area is about twice the transmission distance of the light in the liquid crystal layer of the penetration area, the self-reflection area and the liquid crystal layer of the wearing side cause a phase imbalance of the light, so The brightness of the reflective area is different for the voltage change ΐΐίΪΪί. As shown in Figure 1, '® 1 is a pressure curve according to the conventional technique. The liquid crystal is vertically aligned, in which the curvature is only 6〇%: two = already; the semi-reflective liquid (5) of the fruit tree species 1 material + penetration so that the right to achieve a better display effect, • Adjust the light intensity curve of the reflection zone and the through hole of the 200944886 -1Z1TW 23516twf.doc/n to a similar position to make it similar to the chemical relationship. The invention provides a transflective display unit for a transflective display, which adjusts the light reflectance by adding an insulating layer in the reflective area and adding a new reflective area in the transmissive area. It is similar to the light penetration rate. The present invention provides a driving method for a transflective display unit. The liquid crystal cross-over of the reflective region is adjusted by means of voltage coupling, so that the relationship between the reflectance and the transmittance and the voltage is similar to improve the display quality. The present invention provides a transflective display unit comprising a first reflective region and a transmissive region, wherein the transmissive region has a second reflective region. The first reflective region is configured to display a first image, and the transparent region is configured to display a second image, wherein the first reflective region includes at least a first reflective electrode and a first insulating layer, wherein the first reflective electrode The first crucible edge is formed on the upper and lower sides of the first reflective electrode or between the first reflex electrode and the first substrate. The penetrating region includes at least a transparent electrode and a second reflective electrode, and the transparent electrode is adjacent to the second reflective electrode and formed on the substrate. The first reflective area and the transparent area respectively have a second substrate, a common electrode and a liquid crystal layer. The common electrode is formed on the second substrate and adjacent to the liquid crystal layer, and the liquid crystal layer is located at the common electrode. The first reflective region is adjacent to the penetrating region and the first reflective electrode forms a second reflective region. In an embodiment of the invention, the penetrating region further comprises a second insulation 200944886 J.

rZITW 23516twf.doc/n layer and a common electrode The second insulating layer is formed between the first substrate and the transparent electrode. In another embodiment of the invention, the second reflective electrode is formed of aluminum and the second substrate is formed of a color filter. In another embodiment of the present invention, the liquid crystal thickness of the first reflective region and the penetrating region is the same, and the penetrating region operates in a first voltage interval, the first

The emitter operates in the second voltage interval and the voltage difference between the second voltage section is less than the voltage difference of the first voltage interval. In another embodiment of the invention, the phase retardation 上述 of the first reflective region is a quarter of a wavelength of light. The phase delay amount of the above-mentioned penetration region is one-half of the wavelength of light. From another point of view, the present invention further proposes that the transflective liquid crystal display device L comprises a first substrate and a second substrate, wherein the first substrate comprises a reflective display region and a transmissive display region. The reflective display area includes a first reflective electrode 2 and the transparent display electrode includes a transparent electrode and a second reflective electrode, wherein

The second reflective electrode is located in the transparent electrode. The second substrate includes a common electric and/or liquid crystal layer. The liquid crystal layer is formed on the first substrate 2. In an embodiment of the present invention, the first substrate: the upper and lower sides of the (two) two-electrode are formed or formed. In the second = for the above-mentioned display driving method, the active method can be reversed and the half-through anti-cell is not reduced early. The driving method includes the following steps: providing - the halogen driving voltage 7 200944886

: 1Z1TW 23516twf.doc / n a reflective region; providing a coupling voltage coupled to the first reflective region via the storage capacitor; and adjusting the coupling voltage to adjust the voltage difference across the first reflective region. In an embodiment of the present invention, the driving method, wherein the step of adjusting the coupling voltage comprises: when the pixel driving voltage is positive polarity driving, causing the coupling voltage to be less than a common voltage; and when the pixel driving voltage is When the negative polarity is driven, the coupling voltage is made larger than the common voltage.

In an embodiment of the present invention, the driving method, wherein the step of adjusting a coupling voltage comprises: when the pixel driving voltage is a positive polarity driving day, the coupling voltage is greater than a common voltage; and when the pixel driving voltage is When driving for the negative polarity, the consumption voltage is made smaller than the common voltage. In an embodiment of the present invention, the driving method described above provides for the step of providing a light and voltage, and more includes providing? The through-area engages the voltage and is coupled to the penetration region via the through-region coupling capacitor. The invention is plated with an aluminum plate in a part of the area of the original penetration zone, adding one

a reflective region, and then through the second reflective region and the original design phase retardation amount of λ / 4 ^; λ is the light-wavelength of the first - reflection region, with different area ratio, to reflect the reflectivity versus voltage The inter-luminance part makes it more in line with the penetration voltage side of '2' and thus improves the display effect of the transflective liquid crystal display. The above and other objects, features, and advantages of the present invention will become more apparent. [Embodiment] 8 200944886ziTw 23516twf.doc/n First Embodiment Fig. 2A is a schematic view showing the structure of a transflective display unit according to a first embodiment of the present invention. The transflective display unit 200 includes a first reflective area 2〇1 and a transmissive area 203, wherein the transmissive area 203 has a second reflective area 2〇4 therein. The second reflective region 201 is composed of a first substrate 210, a first reflective electrode 22, an insulating layer 230, a liquid crystal layer 260, a common electrode 270, and a second substrate 28A. The first reflective electrode 220 is formed on the first substrate 210, the insulating layer 230 is formed on the first reflective electrode 22, and the liquid crystal layer 260 is disposed between the insulating layer 230 and the common electrode 270. The common electrode 270 is formed on the common electrode 270. Above the second substrate 280. The penetration region 203 is composed of a first substrate 21, an insulating layer 24, a transparent electrode 250, a liquid crystal layer 260, a common electrode 27A, and a second substrate 280. The insulating layer 240 is formed between the first substrate 21 and the transparent electrode 250, and the liquid crystal layer 260 is disposed between the transparent electrode 25A and the common electrode 270, and the common electrode 270 is formed on the second substrate 28A. Further, a second reflective electrode 225 is further included in the region of the transparent electrode 250 to form the second reflective region 204. Further, it is noted that the insulating layer 23 can be formed on the upper and lower sides of the first reflective electrode 220 or open between the first reflective electrode and the first substrate 210. The insulating layers 230 and 240 may be formed by the same process or by different processes, that is, the insulating layers 23, 24 may be the same layer insulating layer or the independently formed insulating layer. Not limited. In the present embodiment, the second substrate 280 and the first substrate 210 are, for example, a glass substrate, and the second substrate 280 is made of a color light-emitting sheet (c〇1〇r (4) (not 200944886).

• The glass substrate of 1Z1TW 23516twf.doc/n is replaced by the 'common electrode 270' which can be formed directly on the glass substrate of the color filter and adjacent to the liquid crystal layer. The insulating layer 230 is, for example, a transparent material. The light can penetrate the insulating layer 230 and be reflected by the first reflective electrode 220 to display the corresponding light intensity through the liquid crystal layer 260. The common electrode 270 and the transparent electrode 250 are, for example, indium tin oxide QJQ) or a transparent conductive material (such as materials such as IT0, TiO2, Ti, and TiN), wherein the common electrode 270 is normally connected to a common voltage (common v〇itage) Or simply referred to as Xin VCOM). The first reflective electrode 220 and the second reflective electrode 225 in the second reflective region 2〇4 are, for example, aluminum plates. The area of the second reflective electrode 225 can be adjusted according to the design requirements. By adjusting the ratio of the area of the second reflective electrode 225 and the first reflective electrode 220, the relationship between the intensity of the light and the voltage caused by the reflective region can be adjusted, that is, the reflection. rate. The light source of the penetrating region 203 is from a backlight (not shown), and the light source of the first reflecting region 201 is derived from ambient light. When a voltage is applied to the liquid crystal layer, the phase retardation of the liquid crystal layer is changed, and there is a change in light and dark by the upper polarizing plate (generally disposed on the second substrate 280). The 行进 travel path of the light is generally indicated by the arrow in Fig. 2A, and the liquid crystal layer 260 is directly penetrated by the backlight in the penetration region 203. In the first reflective region 201 and the second reflective region 204, light is formed by reflection. Since the insulating layer 230 causes the substantial cross-voltage (the voltage difference between the common electrode 270 and the surface of the insulating layer 23) of the liquid crystal layer 260 in the first reflective region 2〇1 to decrease, the same driving voltage (usually by the capital) The remaining _ line · the supplied pixel drive voltage) has a low reflectance. The reflectance formed by the second reflective region ′ in combination with the south reflectance can have a similar voltage relationship with the light transmittance of the penetrating region "Z1TW 23516twf.doc/n 200944886". In this embodiment, the relationship between the relative intensity of the light generated by the reflective region (including the first reflective region 201 and the second reflective region 204) and the voltage is referred to as the reflectance, and the penetration region is subtracted (excluding the second reflective region 204). Penetration zone 203) - The relationship between the relative intensity of light produced and the voltage is called the penetration rate. Please refer to FIG. 2B. FIG. 2B is a graph showing the relationship between the relative intensity of light and the voltage according to FIG. 2A. The curve C201 represents the relationship between the light reflectance of the first reflection region 201 and the Lu voltage, the curve C204 represents the relationship between the reflectance and the voltage caused by the second reflection region 204, and the curve C2〇 indicates the synthesis. A relationship between light reflectance and voltage of the first reflective region 201 and the second reflective region 204. Curve C203 shows the relationship between the light transmittance of the penetrating region 203 and the voltage. In the present embodiment, the second reflective electrode 225 is formed on the transparent electrode 250 by the aluminum plate, thereby increasing the effect of light reflection. A curve C2 形成 formed by combining the light intensity of the first reflection area 2〇1 and the second reflection area 204 is similar to the curve C203 (dotted line portion), in other words, at the required voltage 犹 Jujube Μ, 歧 显 it it it it it it 与 与 与 与 与 与 与 与 与 与 f f f f f f f f f f f f f f f f f f f + + + 在 在 在 在 在 在 在 在 在230 may cause the liquid crystal layer 26 in the first reflective region 2 to produce a smaller amount of phase retardation, for example, half of the penetrating region 203. Since the line needs to pass through the liquid crystal twice in the first reflecting region 2? The layer 26. Therefore, the wavelength of the light is λ', the phase retardation amount of the penetration region 2()3 can be designed as the edge, and the phase retardation amount of the first reflection region 201 is λ/4, so that the 200944886 can be made.

irZITW 23516twf.doc/n The amount of phase delay caused by a reflection region 201 and the penetration region 203 is the same, so that the relationship between the transmittance and the reflectance is consistent with the voltage. In addition, by adjusting the ratio of the area of the second reflective area 204 to the first reflective area 201, the reflectivity of the entire transflective display unit 200 is changed, and the configuration of the second reflective area 204 is not limited to the position in FIG. 2B. And the number thereof can also be formed by a plurality of dispersed regions, and has the effect of adjusting the reflectance. Since different pixel designs correspond to different pixel structures, and corresponding switching elements (such as transistors) and storage capacitors are also set, look for the main capacitor structure in Figure 2A only in the pixel structure ^ The main technical means of the embodiment is to provide a second reflection zone in the penetration zone. The embodiment is not limited to the above-mentioned structure of FIG. 2A. In this embodiment, a different pixel is set to § ten, and a required second reflection area is disposed in the penetration area. Next, please refer to FIG. 2C, which is a schematic structural view of a transflective display unit according to a first embodiment of the present invention. 2C is different from FIG. 2A in that the position of the transistor and the storage capacitor CST are further illustrated, and the first reflective region capacitance CR1, the insulating layer capacitance COG, the second reflective region capacitance CR2, and the penetration are shown in more detail. The structure of the area capacitor cr and the storage capacitor CST1 in the actual process. The first reflective electrode 220 of the first reflective region 201 is formed by a third metal layer (for example, a nameplate) M3 and is located in the insulating layer 230 (ie, the insulating layer 230 is formed on the upper and lower sides of the first reflective electrode 220). The position of the first reflective electrode 220 can be adjusted to adjust the capacitance of the insulating layer capacitor COG, and the liquid crystal cross-over voltage in the first reflective region 201 can also be adjusted (ie, the first 12 1Z1TW 23516twf.doc/n 200944886 reflective region capacitance CRl The voltage difference between the two ends is proportional to the pixel driving voltage transmitted by the data line dl. When the insulating layer 230 between the first reflective electrode 22 and the liquid crystal layer 260 is thinner, the voltage difference across the first reflective region capacitance CR1 (which can be inferred from the electric field distribution and the thickness of the liquid crystal layer 260) is closer to the data line DL. The transmitted pixel driving voltage can also be adjusted by adjusting the thickness of the insulating layer 230 between the first reflective electrode 220 and the liquid crystal layer 260. • The reflectance in the first reflective region 201. The first reflective electrode 225 is also formed by the third metal layer m3 and electrically connected to the transparent electrode 250 for forming the second reflective region 204 in the transmissive region 203, wherein the second reflective electrode 225 and the transparent electrode 250 are They are electrically connected to each other and have the same potential. When the scan line SL conducts the crystal M201, the data line DL transmits the pixel driving voltage to the transflective display unit 290 via the transistor M2〇1 and causes the first reflective electrode 22, the second reflective electrode 225, and the transparent electrode 250. Has the same pixel drive voltage. In the present embodiment, the reflectance and the transmittance of the transflective display unit 290 can be adjusted by the area of the second reflective electrode 225 so that the voltages of the two are relatively close to each other to improve the picture display quality. In the semiconductor driving circuit of the transflective display unit, the gate terminal GT of the transistor M2〇i is coupled to the scan line 'there is no extreme DT lightly connected to the data line, and the source terminal is via the second metal layer M2. The three metal layers m3 are electrically connected to the first reflective electrode 220, the second reflective electrode 225, and the transparent electrode 25A. The terminal P1 of the storage capacitor CST can be used to improve the driving effect of the transflective display unit, for example, by connecting the common voltage to the external voltage. For example, the end point P1 of the storage capacitor CST is consumed by the consumption voltage. Adjust the light voltage of 13.1Z1TW 23516twf.doc/n to achieve the driving effect of overdrive (0 verdriving). In addition, it should be noted that the above-mentioned two methods of using the second reflective electrode 225 and the thickness of the insulating layer 230 between the first reflective electrode 220 and the liquid crystal layer 260 can be used alone or in combination, which can be more effective. The reflectance and transmittance of the transflective display unit 290 are adjusted. 2D is an equivalent pixel circuit diagram according to FIG. 2C. Referring to FIG. 2A and FIG. 2C, the pixel circuit 295 includes a transistor M201, a φ-th reflection region capacitor CR, an insulation layer capacitor COG, a second reflection region capacitor CR2, a penetration region capacitor CT, and a storage capacitor CST. . The first reflective region 2〇1 mainly includes a first reflective region capacitor CR1 and an insulating layer capacitor c〇G, and the through region 203 mainly includes a penetrating region capacitor CT. In the process of a general liquid crystal display panel, the transistor M201 and the storage capacitor CST are generally composed of a first metal layer M1, a second metal layer M2, a semiconductor layer (semitted by SE), and an isolation layer (insuiator). The composition is as shown in Fig. 2C. The second reflective region capacitor CR2, the transmissive region capacitor CT, and one end of the storage valley CST (ie, the common electrode 270) are coupled to the common voltage ❹VC0M, and the other end (ie, the first reflective electrode 220, the second reflective electrode 225, and The transparent electrode 250) is coupled to the transistor M2〇1, and the first reflective region capacitor CR1 and the insulating layer capacitor c〇G are coupled in series between the transistor M2〇1 and the common voltage VC0M. The transistor M201 is coupled to the data line DL ^ trace SL. When the transistor 201 is turned on by the scan line SL, the data line DL ' can charge the capacitor in the pixel circuit 295 via the transistor. Corresponding to FIG. 2D and FIG. 2C, since the first reflective electrode 220 and the common electrode 270 have an insulating layer 230 and a liquid crystal layer 260, an insulation 200944886 ---------1Z1TW 23516twf.doc/n layer capacitance is formed. COG and first reflection area capacitance CR1. The transparent electrode 25A and the common electrode 270 form a penetration area capacitance CT, and the second reflection electrode 225 and the same electrode 270 form a second reflection area capacitance CR2. For the corresponding positions of the components in Figure 2] ^ and ^ 2C, please refer directly to the labels and component names in the figure, and will not be described in detail here. In the present embodiment, the transflective display unit 200 represents a pixel structure in a liquid crystal display panel, wherein the first reflective area 201 is used to display a first image and the transmissive area 203 is used to display a The second image combines the first image with the second image to form a pixel image. Since the first reflecting area 204' is also included in the penetrating area 2〇3, it can be used to enhance the reflection effect of the overall book. In the case of a pixel structure, the first reflective electrode can be regarded as a reflective display region, and the transparent electrode and the second reflective electrode are regarded as a penetrating display region. SECOND EMBODIMENT Fig. 3A is a schematic view showing the structure of a transflective display unit according to a second embodiment of the present invention. The transflective display unit 3 in the present embodiment also includes a transmissive region 203 and a first reflective region 201, and the transmissive region 203 further includes a second reflective region 204. The main difference between FIG. 3A and FIG. 2C is that the first reflective region 20 and the 1 penetrating region 203 in FIG. 3A are controlled by the transistors M301 and M303, respectively, and the first reflective electrode 220 is disposed on the insulating layer 230, so There is no equivalent insulating layer capacitance in a reflective region 201. The one end of the penetration area capacitor CT, the second reflection area capacitor CR2, and the storage capacitor CST2 of the penetration region 203 is coupled to the source terminal of the transistor M3〇3, and the first reflection area capacitor in the first reflection area 201 CR1 and stored electricity 15 200944886 ------—1Z1TW 23516twf.doc/n One end of the CST1 is coupled to the source terminal of the transistor M3〇1. The transistor M3 (H, M303 has no extreme DT coupled to the data line, and its gate terminal GT is coupled to the scan line. In other words, the half-transflective display unit 3 is divided into two sub-cell structures. , respectively, the first reflective region 2〇1 and the transmissive region. 203. Because the first reflective region 201 and the transmissive region 2〇3 are separated from the electroporation bodies M301 and M303, The storage capacitors CST1 and CST2 respectively adjust the liquid crystal crossover voltage during driving. The storage capacitors CST1 and CST2 may be composed of the first metal layer m and the second metal layer M2 in the liquid crystal panel process. 〃 When the scan line is enabled, the electricity is The crystals M301 and M303 are turned on, and the data line can charge the first reflection area capacitor CR1, the storage capacitor CST1, the penetration area electric valley ct, the second reflection area capacitance, and the storage capacitor CST2. The area of the two reflective electrodes 222 is adjusted to adjust the average reflectance of the entire transflective display unit 300 to be similar to the voltage variation curve of the transmittance. Further, since the first reflective area 2〇1 and the transmissive area 203 are respectively The transistors M301 and M303 are controlled, so this The liquid crystal cross-over in the first reflective region 201 and the transmissive region 203 can be adjusted via the endpoints P2 and P3 of the storage capacitors CST1 and CST2, respectively, so that the reflectivity of the transflective display unit 300 is similar to the transmittance. Next, please refer to FIG. 3A and FIG. 3B simultaneously, and FIG. 3B is an equivalent pixel circuit diagram according to FIG. 3A. The pixel circuit 31 includes a transistor M3〇1, M303': a reflection area capacitor CR1, a storage capacitor CST1, penetrating region capacitor CT, second reflecting region capacitor CR2, and storage capacitor CST2, wherein the first reflective region capacitor CR1 and the storage capacitor CST1 represent the first reflective region 2〇1 16 200944886 1 , TW TW 23516twf.doc/n The equivalent circuit, the penetration area capacitance CT, the second reflection area capacitance CR2, and the storage capacitance CST2 represent the equivalent circuit in the penetration area 203. The corresponding positions of the components in Fig. 3a and Fig. 3B should refer directly to the reference numerals and components in the figure. The name is not described in detail here. The transistor M301 is coupled between the first reflection area capacitor cri, the storage capacitor CST1 and the data line DL, and the transistor M303 is coupled to the penetration area ct and the second reflection area. Capacitor CR2, storage capacitor CST2 and data line DL The gates of the inter-cells M301 and M303 are all coupled to the scan line SL. The other end of the first reflective region capacitor CR1 (common electrode 27A) is coupled to the common voltage VCOM, and the other end of the storage capacitor CST1 (end point p2) And coupling the two coupling voltages vst. The other end of the penetrating region capacitor CT and the second reflecting region capacitor CR2 (the common electrode 270) are coupled to the common voltage VCOM, and the other end of the storage capacitor CST2 (the end point P3) The same is also coupled to the common voltage VCOM. In the present embodiment, in addition to the adjustment of the reflectance by the arrangement area of the second reflection regions 2〇4, the reflectance of the first reflection region 201 can be adjusted by the coupling voltage VST. Via the storage capacitor CST1, the coupling voltage vst can be coupled to the pixel electrode in the first reflection region 201 to adjust its driving voltage V2. Thereby, the relative intensity versus voltage curve (i.e., reflectance) of the light in the first reflection region 2〇1 can be adjusted to make the relationship between the reflectance and the transmittance similar, so as to improve the display quality of the facet. Further, since the actual pixel structure differs depending on the liquid crystal panel process and the array design, the present invention is not limited to the above-described structures of Figs. 2C and 3A. And with regard to the remaining structural details in FIG. 2C and FIG. 3A above, it is generally known in the art. 17 200944886

-1Z1TW 23516twf.doc/n Applicant's disclosure by the present invention should be readily inferred and will not be described here. Third embodiment

From another point of view, the above embodiment can be summarized as a driving method for improving the asymmetry of the reflectance and the transmittance of the transflective display unit. 4A is a driving method of a transflective display unit according to a third embodiment of the present invention. The driving method of this embodiment is suitable for driving the transflective display unit 300 in the above-described embodiment of Fig. 3A. The driving method includes the following steps: step S41: providing a pixel driving voltage to the penetrating region and the first reflecting region; step S420 providing a coupling voltage, coupling to the first reflecting region via the storage capacitor, and step S430 adjusting the coupling voltage to Adjust the liquid crystal cross-pressure of the first reflective area. The main purpose of adjusting the coupling voltage is to make the reflectivity and transmittance of the transflective display unit 3 相 close to each other at the same pixel driving voltage. Therefore, in combination with the structure of the transflective display unit 300, the step of adjusting the coupling voltage in step S43 further includes: when the pixel driving voltage is positive polarity driving, making the light combining voltage less than the - sharing voltage; and when the pixel driving When the voltage is driven by the negative polarity, the engagement voltage is made larger than the common voltage. The common voltage is the common voltage level of the penetration region ❹ 2G3 and the first reflection region 201 when driving, and may be a specific voltage level or a ground voltage level. At the same pixel driving voltage, by adjusting the coupling voltage, the liquid helium cross-pressure in the first reflective region 2〇1 can be changed to make both the transmittance and the reflectivity of the transflective display unit 300 pressed. _ - To. In the present invention, the radiation can also be applied via a coupling capacitor (end point P3) of the penetrating region to provide a coupling voltage to the pixel electrode of the penetrating region to adjust the liquid crystal cross-pressure in the penetrating region. Adjust to near reflectivity. The size of the combined voltage is determined according to the original position of the transmittance and the reflectivity of the 200944886 ---------1Z1TW 23516twf.doc/n line, which is generally known in the art. The disclosure should be easily inferred and will not be repeated here. In order to clarify the driving method of the embodiment of the present invention, the following description refers to FIGS. 3A and 3B at the same time. In the panel, the semi-transmissive display units are usually arranged in an array, and in Fig. 3B, the equivalent pixel circuit of the reverse display unit is only a single half. After the data line DL outputs the pixel driving voltage to the pixel electrodes of the first reflective region 2〇1 and the transmissive region 203 (ie, the first reflective electrode 220, the second reflective electrode 225, and the transparent electrode 250), the scan line SL will The transistors M301 and M303 are turned off. At this time, the coupling voltage VST changes the voltage level with the driving polarity of the book-driven driving lightning voltage, so that the voltage difference between the two ends of the === is smaller than the voltage difference across the penetrating region capacitor CT. When the pixel driving voltage is positive polarity driving, the 'combining voltage VST will be less than the common voltage VCOM. When the pixel driving voltage is negative polarity driving, the light combination voltage vst will be greater than the common voltage VCOM, and the light combination voltage will change. Affecting the driving voltage V2, it can be expressed as: av2 AV.

Csn

^R\ + ^stl + ^gs2 where 'Cstl represents the capacitance value of the storage capacitor CST1, Cri represents the capacitance value of the first reflection capacitor CR1, and Cgs2 represents the parasitic capacitance between the gate and source of the transistor M301 (please confirm the Cgs2 Description). Next, the driving method of the present embodiment will be further described with a waveform diagram, and Fig. 4B is a signal waveform diagram according to the third embodiment. The signal corresponding to the data line dl represents the pixel drive signal. When the scan line SL· is enabled, the data line DL outputs the corresponding pixel drive voltage to the corresponding semi-transparent display 200944886zitw 23516twf.doc/n unit. The above-described pixel circuit 310 is taken as an example. The data line DL charges the first reflection area 201 and the penetration area 203, and the voltages on both sides of the penetration area 203 and the first reflection area 201 are represented by drive voltages vi and V2, respectively. If the handle voltage VST is equal to the common voltage VCOM, the drive voltages VI, V2 are equal. In the present embodiment, the coupling voltage VST drops to below the common voltage VC0M during the positive polarity driving period T1, and rises to the common voltage vc〇M during the negative polarity driving period T2. Therefore, the driving voltage V2 is higher than the driving voltage V2 in the negative polarity driving period T2 during the positive polarity driving period T2 due to the coupling voltage VST during the positive polarity driving period T1. Through the influence of the coupling voltage VST, the substantial cross-pressure of the liquid crystal in the first reflective region 201 is lower, so the curve C2〇1 of the first reflective region 2〇1 will shift to the right to further affect the overall transversal display. The reflectivity of unit 200 is as shown in Figure 4C. Fig. 4C is a graph showing the relationship between the relative intensity of light and voltage in accordance with the third embodiment of the present invention. The position of the curve C2 便可 can be finely adjusted by adjusting the voltage level of the surface voltage VST. Please compare Figure 4c with Figure 2B' to see that the curve (3) 修正 after the correction of the VST voltage is closer to C2G3. In other words, the 'integrated second complemented half-transmissive display unit structure and the driving method of the third embodiment will more effectively fit the curve C20 and the curve C2〇3' to make the light reflectance and transmittance of the transflective display unit have Similar voltage changes. In addition, in the invention, the lightening voltage vst can also be applied in the transmissive region. The storage capacitor CST1 is coupled to the driving capacitor through the transmissive region, but the 1st pressing level needs to be inverted. The effect of fitting the curve. In summary, the light-shielding voltage VST can be used to adjust the liquid crystal cross-pressure of the reflective or transmissive region 20 1Z1TW 23516twf.doc/u 200944886, __half-inverted single-tree transmittance is similar, and the modified dry σ-shot is achieved. Sheep /, first line and have access to HS. In the technical field

Eight has a towel to know the scale, and the method of applying H of the present invention is not described here. It is inferred that the other two diametric zones are provided with a second reflection zone 'and the light combination voltage adjustment parameter = 2 rate curve is more similar' effective to improve the transflective liquid crystal display. Although the present invention has been disclosed in the preferred embodiment Too nL belongs to the catching field towel with mt knowledge, in the absence of this god and Fan _, # can make some changes and retouching, whichever is. _ _ Scope #视_巾, please specify _ circumference defined [Simplified illustration] = is the light intensity and voltage curve according to the traditional technology. The structural diagram is a diagram of a transflective display unit according to a first embodiment of the present invention. Figure 2A is a graph showing the relationship between the relative intensity of light and the voltage according to Figure 2. Figure 2D is a diagram of an equivalent pixel circuit according to Figure 2C. Figure 2B is an equivalent pixel circuit diagram according to Figure 3A. Figure 4A is a semi-transparent display according to a third embodiment of the present invention. Figure 2B is a diagram of an equivalent pixel circuit according to Figure 3A. Fig. 4 is a signal waveform diagram according to a third embodiment. Fig. 4C is a graph showing relative light intensity versus voltage according to a third embodiment of the present invention. [Main component symbol description] 200, 290, 300: The transflective display unit 201: the first reflective region 203, the transmissive region 204: the second reflective region 210: the first substrate 220: the first reflective electrode 225: the second reflective electrode 230, 240: the insulating layer 250 the transparent electrode 260 Liquid crystal layer 270 common electrode 280 second substrate 295, > 310: pixel circuit C C2, C2 (U, C204, C20, C203: curve CR1: first reflection area capacitance CR2: second reflection area capacitance CST, CST1 , CST2 : storage capacitor 22 rznw 23516twf.doc / n 200944886 CT : penetration area capacitance COG : insulation layer capacitance DL : data line SL : scan line DT : 汲 extreme GT : gate terminal • M201, M301, M303 : transistor

Ml: first metal layer® M2: second metal layer M3: third metal layer PI, P2, P3: terminal VCOM: common voltage VST: coupling voltage VI, V2: driving voltage T1: positive polarity driving period T2: negative electrode Sex drive period ❹ S410~S430: Step 23

Claims (1)

200944886 -1Z1TW 23516twf.doc/n X. Patent application: 1. A transflective display unit comprising: a first reflective area for displaying a first image, the first reflective area comprising at least a first a reflective electrode and a first insulating layer, wherein the first reflective electrode is formed on the first substrate, and the first insulating layer is formed on the upper and lower sides of the first reflective electrode or formed on the first reflective electrode And the first substrate; and a penetrating region for displaying a second image, the penetrating region comprising at least a transparent electrode and a second reflective electrode, the transparent electrode being electrically connected to the second reflection An electrode is formed on the first substrate; wherein the first reflective region and the transparent region respectively have a second substrate, a common electrode and a liquid crystal layer, and the common electrode is formed on the second substrate Adjacent to the liquid crystal layer, the liquid crystal layer is located between the first electrode and the second substrate, the first reflective region is adjacent to the penetrating region, and the second reflective electrode forms a second reflective region. 2. The pixel of claim 1, wherein the penetrating region further comprises: a second insulating layer formed between the second substrate and the transparent electrode. 3. The transflective display unit of claim 1, wherein the second substrate is a glass substrate of a color filter. 4. The transflective display unit of claim 1, wherein the first reflective electrode and the second reflective electrode are formed of aluminum. 5. The transflective display unit of claim 1, wherein the first reflective region has a phase retardation amount of one quarter of a wavelength of light. The semi-transflective display unit of claim 1, wherein the phase retardation of the penetrating region is one-half of the wavelength of light. 7. The transflective display unit of claim 1, wherein the first reflective region has the same liquid crystal thickness as the transmissive region. 8. The transflective display unit of claim 1, wherein the first reflective region comprises: a first reflective region capacitance; and an insulating layer capacitance. 9. The transflective display unit of claim 1, wherein the first reflective region comprises a first reflective region capacitance. 10. The transflective display unit of claim 1, wherein the penetrating region comprises: a penetrating region capacitor; and a second reflecting region capacitor formed by the second reflecting region. 11. The transflective display unit of claim 1, further comprising: G - a first transistor coupled between the first reflective region and a data line; and a second transistor, The gate is coupled to the data line; and the gate of the first transistor and the second transistor are coupled to a scan line. 12. A driving method for a transflective display unit, the transflective display unit comprising a penetrating region and a first reflecting region, the driving method comprising the steps of: providing a pixel driving voltage to the wearing a through region and the first reflective region; 25 200944886 ..... - rZ1TW 23516twf.doc / n providing a - surface voltage, lightly coupled to the reflective region via a storage capacitor; and adjusting the surface voltage to adjust the The voltage difference across the first reflection zone. 13. The driving method according to claim 12, wherein the step of adjusting the coupling voltage comprises: when the driving voltage of the animal is positively driven, the coupling voltage is made smaller than a common voltage; When the driving voltage of the battery is negative polarity driving, the coupling voltage is made larger than the common voltage. 14. The driving method of claim 12, wherein the step of adjusting the coupling voltage further comprises: when the driving voltage of the element is positively driven, causing the engagement voltage to be greater than a common voltage; When the halogen drive voltage is driven by a negative polarity, the engagement voltage is made smaller than the common voltage. 15. The driving method of claim 12, wherein the 穿透 penetration region further comprises a second reflection region, and the first reflection region and the penetration region have the same liquid crystal thickness. 16. The driving method of claim 12, wherein the first reflective region comprises: a first substrate; a first reflective electrode formed on the first substrate; an insulating layer formed on a liquid crystal layer disposed between the reflective electrode and a second substrate; and a common electrode formed on the second substrate by 26 200944886 x wxvxw^fZlTW 23516twf.doc/n and a common electrode In the layer; wherein the first reflective electrode and the common electrode form the reflective region capacitor. The driving method of claim 12, wherein the penetrating region comprises: a first substrate; an insulating layer formed on the first substrate; a transparent electrode formed on the Above the insulating layer, the region of the transparent electrode includes a second reflective electrode to form the second reflective region; a liquid crystal layer disposed between the transparent electrode and a second substrate; and a common electrode formed on Above the second substrate and adjacent to the liquid crystal layer. 18. The driving method of claim π, wherein the first substrate is a glass substrate of a color light film. 19. The driving method of claim π, wherein the second substrate is a glass substrate of a color filter. 20. The driving method of claim 1, wherein the second reflective electrode is formed by the name. The driving method according to claim 12, wherein the phase retardation amount of the penetrating region is one-half of a wavelength of light. The driving method according to claim 12, wherein the phase retardation amount of the reflection region is one quarter of a wavelength of light. 27 200944886 JZ1TW 23516twf.doc/n 23. A transflective liquid crystal display device comprising: a first substrate comprising: a reflective display region comprising a first reflective electrode; and a transmissive display region comprising a transparent An electrode and a second reflective electrode. The second reflective electrode is located in the transparent electrode; a second substrate includes a common electrode; and a liquid crystal layer formed on the first substrate and the second substrate between. 24. The transflective liquid crystal display device of claim 23, further comprising: an insulating layer formed on the upper and lower sides of the first reflective electrode or formed on the first reflective electrode and the Between the first substrates. 25. The transflective liquid crystal display device of claim 23, further comprising: an insulating layer formed between the first substrate and the transparent electrode. 26. The transflective liquid crystal display device of claim 23, wherein the first substrate is a glass substrate of a color filter. The transflective liquid crystal display device of claim 23, wherein the first reflective electrode and the second reflective electrode are formed of aluminum. 28. The transflective liquid crystal display device of claim 23, wherein the first reflective region has a phase retardation amount of one quarter of a wavelength of light. 29. The transflective liquid crystal display device of claim 23, wherein the phase retardation amount of the penetrating region is one-half of a wavelength of light. 30. The transflective liquid crystal display device of claim 23, wherein the thickness of the liquid crystal disposed in the reflective display region and the transmissive display region is the same. 28