TWI529453B - Dual modes liquid crystal display - Google Patents

Description

Dual display mode LCD

The present invention relates to a liquid crystal display, and more particularly to a dual display mode liquid crystal display.

With the development of display technology, liquid crystal display (LCD) has been widely used in various electronic products such as notebook computers, tablet computers, mobile phones, and digital cameras.

The individual pixels in a conventional semi-reflective semi-transparent liquid crystal display are generally divided into a transmissive sub-pixel region and a reflective sub-pixel region. In the transmissive sub-pixel region, the light generated by the backlight module adjusts the optical phase difference to control the amount of light transmitted through the liquid crystal deflection mode of the transmissive sub-pixel region. In the reflective sub-pixel area, the ambient light reflected from the outside and reflected by the reflective sub-pixel area adjusts the optical phase difference by the liquid crystal deflection mode of the reflective sub-pixel area to control the reflection. The amount of light.

A typical semi-reflective semi-transmissive liquid crystal display can simultaneously improve the low brightness of the reflective display when the ambient illumination is insufficient and the image display fades under the outdoor sunlight, and reduce the power consumption of the backlight. However, since both the transmissive sub-pixel region and the reflective sub-pixel region adopt the same liquid crystal display mode, for example, both Twisted Nematic liquid crystal alignment structures or Vertically Aligned liquid crystal alignment structures are used. Therefore, the penetrating sub-pixel region and the reflective sub-pixel region generally have the same liquid crystal arrangement and the same alignment structure. However, in the above-mentioned liquid crystal alignment structure, the liquid crystal display mode is limited in the transmissive sub-pixel region, and the viewing angle is not good, and the effect of the full viewing angle and the wide viewing angle cannot be achieved.

Specifically, a preferred liquid crystal alignment mode of a generally transflective liquid crystal display is a Reflective Electrically Controlled Birefringence (RTN) or a so-called twisted liquid crystal alignment structure. However, the conventional twisted liquid crystal alignment structure has a light leakage phenomenon in the oblique direction. Therefore, when the front side and the oblique direction are viewed, the brightness and the contrast change depending on the viewing angle, which has the disadvantage of a poor viewing angle. In general, when the reflective sub-pixel area is made, the reflective sub-pixel area is normally white, and the optical compensation film is added to enhance the black state. The perspective of the black state. Therefore, in the semi-reflective semi-transparent liquid crystal display, an optical compensation mode is added simultaneously with the transmissive sub-pixel region and the reflective sub-pixel region. However, the optical compensation mode can generally only assist in the front direction, and there is another light leakage at the oblique angle, so that the black state of the penetrating sub-pixel region is not black enough. Accordingly, the semi-reflective semi-transmissive liquid crystal display can not exhibit a wide viewing angle display effect when operated in the through mode display mode, and even has a worse contrast effect than the conventional transmissive liquid crystal display, and reduces the transmissive viewing angle. Furthermore, the effect of the full viewing angle and the wide viewing angle cannot be achieved.

Accordingly, it is an object of the present invention to provide a dual display mode liquid crystal display having a wide viewing angle effect in a penetration mode.

To achieve the above objective, an embodiment of the present invention provides a dual display mode liquid crystal display including an active matrix substrate, an upper substrate, a liquid crystal display layer, and a plurality of matrix devices formed on the active matrix substrate. A pixel between the substrates. The upper substrate is disposed above the active matrix substrate, and the liquid crystal display layer is sandwiched between the active matrix Between the substrate and the upper substrate. Each pixel has at least a first area and a second area. The first region has at least one transmissive sub-pixel region, and the second region has at least one reflective sub-pixel region. The penetrating sub-pixel region has a first display mode, and the reflective sub-pixel region has a second display mode. The first display mode is a Vertically Aligned mode, a Multi-Domain Aligned mode, an In Plane Switching mode, a Fringe Field Switching mode, or a surface enhancement mode. Surface Enhanced Fringe Field. The second display mode is a Reflective Twisted Nematic, a Reflective Electrically Controlled Birefringence, a Mixed Mode Twisted Nematic, and a Reflective Optical Compensation Mode (Reflective). Optical Compensation) or Reflective Vertically Aligned mode.

In one embodiment of the present invention, when the first display mode is a transverse electric field mode, a marginal electric field switching mode, or a surface enhanced electric field mode, the lower surface of the upper substrate is further dispersed and disposed, and the plurality of strips respectively extend across the corresponding column. A common electrode of the same pixel, and the common electrodes are not located on the lower surface of the upper substrate of the first region, but only on the lower surface of the substrate above the second region.

In one embodiment of the present invention, when the first display mode is a transverse electric field mode, a marginal electric field switching mode or a surface enhanced electric field mode, each of the pixels has a position in the transmissive sub-pixel region on the active matrix substrate. The first electrode is provided with a first common electrode at a position on the upper surface of the transparent substrate that is offset from the first electrode. Each of the pixels has a position in the reflective sub-pixel The second electrode of the region, and the lower surface of the substrate above the reflective sub-pixel region is provided with a second common electrode. The first common electrode is electrically coupled to the second common electrode, wherein the first secondary electrode and the second secondary electrode form a pixel electrode. The first common electrode and the partial pixel electrode are blocked by an insulating layer. The first common electrode has a comb shape, a grid shape, a wrap shape or a curved shape, and includes an electrode line on a side of the partial pixel electrode and a plurality of bends extending from the electrode line toward a central region of the partial pixel electrode Electrode wire.

In one embodiment of the present invention, the first liquid crystal display layer is a horizontally arranged positive liquid crystal or a negative liquid crystal or a vertically arranged negative liquid crystal, and the second liquid crystal display layer is a horizontally arranged positive liquid crystal or Negative liquid crystal or vertical liquid crystal arranged vertically.

In one embodiment of the present invention, the first region of each of the pixels has at least a first gamma transmittance gray-voltage conversion curve. The second region has at least a second gamma reflectance gray-to-voltage conversion curve.

In one embodiment of the present invention, the first gamma transmittance gray-voltage conversion curve and the second gamma reflectance-gray-voltage conversion curve are inverse curves.

In one embodiment of the present invention, the driving circuit of the first display mode and the driving circuit of the second display mode further include dot inversion, line inversion driving or frame inversion ( Frame inversion) driver.

In summary, the embodiment of the present invention provides a dual display mode liquid crystal display, which provides a dual display mode by arranging a wide viewing angle liquid crystal alignment structure in a transmissive sub-pixel region of each pixel. When the liquid crystal display operates in the penetrating mode, it can increase the viewing angle and reach a wide range. The power and purpose of the perspective.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

[Embodiment of Dual Display Mode Liquid Crystal Display]

Please refer to FIG. 1 and FIG. 2 simultaneously. FIG. 1 is a schematic side cross-sectional view of a dual display mode liquid crystal display according to an embodiment of the present invention. 2 is a schematic diagram showing a detailed circuit of a partial pixel of a dual display mode liquid crystal display according to an embodiment of the present invention. In this embodiment, the dual display mode liquid crystal display includes an active matrix substrate 100, an upper substrate 200 disposed at intervals above the active matrix substrate 100, and a liquid crystal sandwiched between the active matrix substrate 100 and the upper substrate 200. The display layer 300, and a plurality of pixels formed in a matrix between the active matrix substrate 100 and the upper substrate 200.

2 is exemplified by only four pixels P ₁₁ , P ₁₂ , P ₂₁ , and P ₂₂ , each of which has at least a first area and a second area. The first area has at least one transmissive sub-pixel area TA. The second region has at least one reflective sub-pixel area RA. That is, the pixels P ₁₁ , P ₁₂ , P ₂₁ , and P ₂₂ respectively have a first area and a second area, wherein the first area is provided with at least one transmissive sub-pixel area TA, and in the second area At least one reflective sub-pixel area RA is provided. The transmissive sub-pixel area TA has a first display mode such that liquid crystal molecules distributed in the transmissive sub-pixel area TA have a first alignment structure that produces a wide viewing angle effect. The reflective sub-pixel area RA has a second display mode such that the liquid crystal molecules distributed in the reflective sub-pixel area RA have a second alignment structure.

Further, the first display mode may be a Transmissive Vertically Aligned (TVA), a Multi-domain Vertical Alignment (MVA), and a transverse electric field in this embodiment. One of the modes (In-Plane Switching, IPS for short), the enhanced Fringe Field Switching (FFS), and the Surface Enhanced Fringe Field.

The second display mode may be Reflective Twist Nematic (RTN), Reflective Electrically Controlled Birefringence (R-ECB), Mixed Twisted Nematic (Mixed Mode Twisted Nematic) , referred to as MTN), Reflective Optical Compensative (ROC) or Reflective Vertical Alignment (RVA). The arrangement of the liquid crystal molecules in the first display mode and the second display mode, for example, the tilt angle of the liquid crystal molecules, may be configured according to actual viewing angle design requirements, display operation modes, and actual production requirements, and the embodiment is not limited.

In this embodiment, the first display mode is exemplified by the multi-domain division vertical alignment alignment mode. Therefore, the first display mode of the dual display mode liquid crystal display includes two upper surfaces and an upper substrate respectively disposed on the active matrix substrate 100. a lower surface of 200, and corresponding to the first alignment film structure 11, 12 of the transmissive sub-pixel region TA, such that liquid crystal molecules interposed between the first alignment film structures 11, 12 are in the first alignment direction The first liquid crystal display layer LC1 having the first alignment structure is formed in an ordered manner.

The second display mode may adopt a reflective twisted nematic mode, a reflective electronically controlled birefringence mode, a hybrid twisted nematic mode, a reflective optical compensation mode, or a reflective vertical alignment mode. The structure of the second display mode of the dual display mode liquid crystal display mainly comprises two second alignment film structures respectively disposed on the upper surface of the active matrix substrate 100 and the lower surface of the upper substrate 200 and corresponding to the reflective sub-pixel area RA. 21, 22, so that the liquid crystal molecules sandwiched therebetween are sequentially arranged in the second alignment direction to form the second liquid crystal display layer LC2 having the second alignment structure.

It should be noted that the first alignment film structures 11, 12 and the second alignment film structures 21, 22 may be bump structures or slits, wherein the material of the bump structure may include polyvinyl alcohol, poly Asia. Indoleamine, polyamine, polyurea, nylon, ceria or lecithin. The materials of the first alignment film structures 11 and 12 and the second alignment film structures 21 and 22 may be the same material or a similar structure material or a high molecular polymer, and the first alignment film structures 11 and 12 and the first The materials of the two alignment film structures 21, 22 may also be different materials, but the embodiment is not limited. In addition, the first alignment direction and the second alignment direction may be the same alignment direction or a specific angle alignment direction, and the first alignment direction and the second alignment direction may also be different alignment directions. In practice, the actual alignment of the first alignment and the second alignment is configured according to the actual arrangement of the liquid crystals, and thus the embodiment is not limited.

The first liquid crystal display layer LC1 is a horizontally arranged positive liquid crystal (ie, Δε>0), and as shown in FIG. 1, the alignment technique of the vertical alignment mode is formed on the side of the upper substrate 200 (and/or on the side of the active matrix substrate 100). The protrusions 13 (and/or grooves) of the liquid crystals are not in a conventional upright arrangement when the liquid crystal is at rest, but are inclined at a certain angle. Thus, when a voltage is applied, the liquid crystal can be divided. The sub-items are rapidly changed to a horizontal arrangement to greatly shorten the display time, and the alignment of the liquid crystal molecules is changed by the protrusions 13 (and/or the grooves) to make the viewing angle wider.

The second liquid crystal display layer LC2 is also horizontally arranged positive liquid crystal (ie, Δε>0), but the liquid crystal will stand straight and twist after applying a voltage, wherein the liquid crystal twist angle may range between 30 degrees and 90 degrees. Further, the first liquid crystal display layer LC1 may be a horizontally arranged negative liquid crystal (ie, Δε<0) or a vertically arranged negative liquid crystal. The second liquid crystal display layer LC2 may be a vertically arranged negative liquid crystal or a horizontally arranged or negative liquid crystal.

As shown in FIG. 2, the active matrix substrate 100 further includes a transparent substrate 101, a plurality of scanning lines S1, S2 or S3 arranged in parallel and spaced apart on the upper surface of the transparent substrate 101, and a plurality of parallel and spacedly disposed transparent substrates 101. The upper surface, and the data lines D1, D2 or D3 interleaved with the scan lines S1, S2, S3. Each of the pixels (i.e., pixels P _11, P _12, P ₂₁ or P ₂₂₎ comprises a pixel electrode formed on the upper surface 102 of the transparent substrate 101 and an active matrix T. The portion of the pixel electrode 102 in the transmissive sub-pixel region TA is divided into two sub-electrodes 1021, 1022 by a slit 14, and the first alignment is disposed on the surfaces of the sub-electrode 1021 and the sub-electrode 1022, respectively. Membrane structure 12. The pixel electrode 102 is further provided with a reflection unit 103 (for example, an aluminum layer) on a part of the surface of the reflective sub-pixel area RA, and the second alignment film structure 22 is actually disposed on the surface of the reflection unit 103.

As shown in FIG. 2, each active matrix T is realized by a transistor such as a thin film transistor switch, a double gate thin film transistor or a lightly doped thin film transistor. The gates G of the active matrix T are electrically coupled to corresponding scan lines S1, S2 or S3, respectively. The source S of the active matrix (such as the transistor) T and the corresponding The data line D1, D2 or D3 is electrically coupled to receive data signals from the data line D1, D2 or D3. The drain D of the active matrix (e.g., transistor) T is electrically coupled to the pixel electrode 102.

Between the lower surface of the upper substrate 200 and the first alignment film structure 11 and the second alignment film structure 21 (not shown in FIG. 1 ), a plurality of common electrodes Vcom extending through the corresponding columns respectively are dispersedly disposed. The pixel electrode 102, the first liquid crystal display layer LC1 and the common electrode Vcom of the transmissive sub-pixel area TA together form a first liquid crystal capacitor C _LC1 . The pixel electrode 102, the second liquid crystal display layer LC2 of the reflective sub-pixel area RA, and the common electrode Vcom together form a second liquid crystal capacitor C _LC2 . The reflective unit 103 (eg, an aluminum layer) is electrically coupled to the drain D of the active matrix (transistor) T. It is worth mentioning that the secondary electrodes 1021, 1022 and the common electrode Vcom are indium tin oxide (ITO), indium zinc oxide (IZO), metal or alloy.

In addition, as shown in FIG. 2, each of the pixels (ie, pixels P ₁₁ , P ₁₂ , P ₂₁ or P ₂₂ ) further includes a storage capacitor C _ST formed on the upper surface of the transparent substrate 101, and each of the storage capacitors C _ST One end is electrically coupled to the corresponding common electrode Vcom, and the other end of the storage capacitor C _ST is electrically coupled to the drain D of the corresponding active matrix T.

Thereby, as shown in FIG. 1, when the dual display mode liquid crystal display of the embodiment operates in a reflective mode (for example, working in a bright place), the external ambient light source 30 is incident on the reflective sub-pixel area RA of the pixel. The data line D1 connected to the source S of the active matrix T inputs a data signal to charge the second liquid crystal capacitor C _LC2 and the storage capacitor C _ST to control the second liquid crystal display layer LC2 of the reflective sub-pixel area RA. The liquid crystal molecules are appropriately deflected to adjust the external ambient light source 30 that is externally incident into the reflective sub-pixel area RA and reflected back by the reflective unit 103 of the reflective sub-pixel area RA, thereby displaying an image representing the data signal.

When the dual display mode liquid crystal display operates in a penetrating mode (for example, working in a dark place), the backlight 40 generated by the backlight module (not shown) of the dual display mode liquid crystal display passes through the pixel through-sub-picture. The prime region TA is punctured. At this time, the first liquid crystal capacitor C _LC1 and the storage capacitor C _{ST are} charged by the data signal input from the data line D1 connected to the source S of the active matrix T, so that the control penetrating sub-pixel is controlled. The liquid crystal molecules in the first liquid crystal display layer LC1 of the area TA are appropriately deflected to adjust the backlight 40 that passes through the transmissive sub-pixel area TA, and the image representing the data signal is displayed. In other words, the backlight module has a backlight driving architecture that adjusts the backlight 40 or the on/off function according to the ambient light source dimming and the switching state according to the first display mode and the second display mode.

Incidentally, the driving method of the first display mode and the second display mode may include a dot inversion driving, a line inversion driving, or a frame inversion driving. Furthermore, the first display mode and the second display mode may have different driving modes. It should be noted that the first display mode and the second display mode may respectively have different update frequencies, and even the first display mode and the second display mode may have two or more update frequencies respectively.

For example, in a specific driving manner, the first display mode can be driven using a dot inversion mode, and the second display mode can be driven using line inversion or frame inversion. Specifically, in the second display mode, the line inversion driving method is used as an example, and the data signal can be transmitted to the pixels P ₁₁ , P ₁₂ , P ₂₁ , and P ₂₂ through the data lines (for example, D1, D2, and D3). The polarity of the first liquid crystal capacitor C _LC1 in the pixel, for example, pixel P ₁₁ , is opposite to the polarity of charging of the first liquid crystal capacitor C _{LC1 of the} other pixels P ₁₂ , P ₂₁ , P ₂₂ around it. At the same time, through the data lines (e.g. D1, D2, D3) transmits data signals to the pixels _{P 11, P 12, P 21} , P 22 so that in any pixel, for example, P _11, P ₁₂ of an adjacent second horizontal scan line the liquid crystal capacitor C _LC2 of the polarity of the voltage charged pixels P _21, P in the second liquid crystal capacitor C _LC2 of ₂₂ is charged voltage polarity opposite to each other.

It is worth noting that the driving mode in which the first display mode has a better display effect is generally a dot inversion driving mode, and the power consumption of the dot inversion driving mode is large. Therefore, in the embodiment, the driving mode corresponding to the first display mode is dot inversion, and the driving mode corresponding to the two display modes is line inversion or frame inversion to save the second display mode driving. Explicit power. In addition, the driving manners of the first display mode and the second display mode may be configured according to the power of the electronic device using the dual display mode liquid crystal display or the light source strength of the use environment, which is not limited in this embodiment.

In addition, since the above-mentioned dot inversion, line inversion or frame inversion driving are conventional liquid crystal display driving technologies, those skilled in the art should know the above-mentioned dot inversion, line inversion or frame inversion. The actual application method is not described here.

In addition, since the transmissive sub-pixel area TA is a multi-domain segmentation and vertically arranged wide viewing angle alignment structure, when the dual display mode liquid crystal display operates in the penetrating mode, the viewing angle is increased, and the dual display mode liquid crystal display has a field of view. The angle is wider.

[Another embodiment of a dual display mode liquid crystal display]

Referring to FIG. 3 to FIG. 4, FIG. 3 is a schematic cross-sectional view of a pixel side of a dual display mode liquid crystal display according to another embodiment of the present invention. The dual display mode liquid crystal display shown in FIG. 3 to FIG. 4 has the same feature as the dual display mode liquid crystal display shown in FIG. 1 in that the common electrode and the pixel electrode are disposed on the active matrix substrate 100.

The difference between the dual display mode liquid crystal display shown in FIG. 3 to FIG. 4 and the dual display mode liquid crystal display shown in FIG. 1 is that in the embodiment, the penetrating sub-pixel area TA of the pixel is the first. A display mode is to use the transverse electric field mode (IPS), the enhanced transverse electric field mode (Advanced In-Plane Switching (AIPS), the super transverse-electric field mode (SIPS) or the enhanced marginal electric field switching mode (Advanced Fringe). Field Switching (AFFS) is one of them.

As shown in FIG. 3, when the first display mode is a transverse electric field mode, a marginal electric field switching mode, or a surface enhanced electric field mode, the lower surface of the upper substrate 200 above the active matrix substrate 100 is further dispersed and arranged to extend through the corresponding columns. a common electrode of the pixels, the common electrodes are not located in the lower region of the substrate 200 above the trans-sub-pixel region TA in the first region, but only in the second region The lower surface of the substrate 200 above the area RA.

In this embodiment, the first display mode of the dual display mode liquid crystal display is exemplified by using the marginal electric field switching mode. As shown in FIG. 4, each of the pixels has a transmissive sub-pixel area in the first region. The first electrode 105 of the TA and the second electrode 106 of the reflective sub-pixel area RA in the second region constitute the pixel electrode 102.

Further, the first electrode 105 of the transmissive sub-pixel area TA A first common electrode Vcom1 is disposed above the first common electrode Vcom1, and the first common electrode 105 is blocked by an insulating layer 104, and the first common electrode Vcom1 includes an electrode line on a side of the first electrode 105. 31, and a plurality of bent electrode lines 32 extending from the electrode line 31 toward the central region of the first electrode 105. The first common electrode 105 can be configured in a comb shape, a grid shape, a wrap shape or a curved shape, and is configured according to actual design requirements. This embodiment is not limited.

The first display mode has a first liquid crystal capacitor formed by the liquid crystal display layer, the first common electrode of the active matrix substrate, and a bending electric field of the pixel electrode; the second display mode has the liquid crystal display layer, the The second common electrode of the upper substrate and the electric field of the pixel electrode of the active matrix substrate form a second liquid crystal capacitor.

Since the marginal electric field switching mode is a conventional wide viewing angle technology, it will not be described in detail herein. As shown in FIG. 3, a lower surface of the substrate 200 corresponding to the reflective sub-pixel area RA of each pixel is provided with a second common electrode Vcom2, and the first common electrode Vcom1 and the second common electrode Vcom2 are electrically coupled. Connected to the common potential.

The active matrix substrate 100 includes a transparent substrate 101, a plurality of scanning lines S1 disposed in parallel and spaced apart on the upper surface of the transparent substrate 101, and a plurality of parallel and spacedly disposed upper surfaces of the transparent substrate 101, and interlaced with the scanning lines S1. Data lines D1, D2. Each of the pixels includes a pixel electrode 102, a first active matrix T1, and a second active matrix T2 formed on the upper surface of the transparent substrate 101. The first active matrix T1 and the second active matrix T2 may be implemented by a transistor, such as a thin film transistor switch, a double gate thin film transistor, or a lightly doped thin film transistor, respectively.

As shown in FIG. 4, each of the pixels is located in the reflective sub-pixel area RA. The source S of the first active matrix T1 is electrically coupled to the data line D1. The gate G of the first active matrix T1 is electrically coupled to a corresponding scan line, such as the scan line S1, and the drain D of the first active matrix T1 is electrically coupled. The pixel electrode 102 is connected. The source S of the second active matrix T2 in the transmissive sub-pixel area TA is electrically coupled to the data line D2, and the gate G of the second active matrix T2 is electrically coupled to the corresponding scan line, for example The line S1 is scanned, and the drain D of the second active matrix T2 is electrically coupled to the pixel electrode 102.

It is worth mentioning that the first display mode of the transmissive sub-pixel area TA and the second display mode of the reflective sub-pixel area RA may have different update frequencies as described above. Therefore, in the present embodiment, the first display mode of the transmissive sub-pixel area TA uses an update frequency of 20 Hz, and the second display mode of the reflective sub-pixel area RA uses an update frequency of 5 Hz.

The dual display mode liquid crystal display architecture and other circuit architecture of FIG. 3 are similar to the dual display mode liquid crystal display of FIG. 1 and those skilled in the art should be able to infer the operation mode of the dual display mode liquid crystal display of FIG. 3, I will not repeat them here.

[Another embodiment of a dual display mode liquid crystal display]

Referring to FIG. 5, FIG. 5 is a cross-sectional view of a pixel side of a dual display mode liquid crystal display according to another embodiment of the present invention. In addition, as shown in FIG. 5, each pixel of the dual display mode liquid crystal display is shown in FIG. The first display mode of the transmissive sub-pixel area TA is an example of a transverse electric field mode alignment mode (IPS) structure, which is different from the marginal electric field switching mode used by the first display mode of the dual display mode liquid crystal display of FIG. The first electrode 105' located in the transmissive sub-pixel area TA and the first common electrode Vcom1' are vertically staggered and staggered on the upper surface of the transparent substrate 101. The face is separated by an insulating layer 104'. The first electrode 105' is electrically coupled to the source of the active matrix T (not shown in FIG. 5), and the first common electrode Vcom1' is disposed under the substrate 200 disposed above the reflective sub-pixel area RA. The second common electrode Vcom2 of the surface is electrically coupled to have a common potential.

The dual display mode liquid crystal display architecture and other circuit architecture of FIG. 5 are similar to the dual display mode liquid crystal display of FIG. 1 and those of ordinary skill in the art should be able to infer the operation mode of the dual display mode liquid crystal display of FIG. 5, I will not repeat them here.

[Another embodiment of a dual display mode liquid crystal display]

In addition, please refer to FIG. 6. FIG. 6 is a detailed circuit diagram of each pixel of the dual display mode liquid crystal display according to another embodiment of the present invention.

In this embodiment, the transmissive sub-pixel area TA and the reflective sub-pixel area RA of each pixel (for example, pixel P ₁₁ ) in FIG. 6 can be individually controlled. That is to say, each row of pixels is assigned two data lines D1, D2, and each column of pixels is assigned a scan line S1. Each of the pixels includes a first storage capacitor C _ST1 corresponding to the transmissive sub-pixel area TA and a first active matrix T1, and a second storage capacitor C corresponding to the reflective sub-pixel area RA. _ST2 and a second active matrix T2. Each pixel (e.g., pixel P ₁₁₎ Vcom1 the first common electrode is electrically coupled to the first end of the storage capacitor C _ST1 and the corresponding, and each pixel (e.g., pixel P ₁₁₎ of the second storage capacitor One end of the CST2 is electrically coupled to the corresponding second common electrode Vcom2. The gate G of the first active matrix T1 in each pixel (for example, pixel P ₁₁ ) is electrically coupled to the corresponding scan line S1, and the source S and one of the two data lines, such as the data line D1. Coupling, the drain D is electrically coupled to the other end of the corresponding first storage capacitor C _ST1 and the corresponding first sub-electrode 105, and further includes a first sub-electrode 105, a first liquid crystal display layer LC1, and a first The common electrode Vcom1 forms a first liquid crystal capacitor C _LC1 . The gate G of the second active matrix T2 in each pixel (for example, pixel P ₁₁ ) is electrically coupled to the corresponding scan line S1, and the source S is electrically coupled to the other of the two data lines, that is, the data line D2. Connected, the drain D is electrically coupled to the other end of the corresponding second storage capacitor C _ST2 and the corresponding second sub-electrode 106, and further by the second sub-electrode 106, the second liquid crystal display layer LC2, and the second The electrode Vcom2 forms a second liquid crystal capacitor C _LC2 .

Thereby, when the dual display mode display operates in the penetration mode, the scan line S1 will simultaneously drive the first active matrix T1 and the first active matrix T2 of the same column of pixels (for example, pixel P11), but only the data line D1 Sending a data signal to the first active matrix T1 to charge the first liquid crystal capacitor C _LC1 and the first storage capacitor C _ST1 to control proper deflection of liquid crystal molecules in the first liquid crystal display layer LC1 of the transmissive sub-pixel region TA Then, the backlight 40 passing through the transmissive sub-pixel area TA is adjusted to display an image representing the data signal. In addition, since the transmissive sub-pixel area TA is a wide viewing angle alignment structure using the marginal electric field switching mode, the viewing angle of the dual display mode liquid crystal display can be increased. In this embodiment, the transmissive sub-pixel area TA is a wide viewing angle alignment structure using a marginal electric field switching mode, but in practice, the transmissive sub-pixel area TA may also be configured to enhance the transverse electric field mode and the super transverse electric field. The mode or the enhanced fringe field switching mode (Fringe Field Switching) is not limited in this embodiment.

When the dual display mode liquid crystal display operates in the reflective mode, the scan line S1 simultaneously drives the first active matrix T1 and the second active matrix T2 of the same column of pixels (for example, pixel P ₁₁ ), but only the data line D2 sends the data. The signal is applied to the second active matrix T2 to charge the second liquid crystal capacitor C _LC2 and the second storage capacitor C _ST2 to control the proper deflection of the liquid crystal molecules in the second liquid crystal display layer LC2 of the reflective sub-pixel region RA, so as to adjust Enter the reflective sub-pixel area RA. At the same time, the external ambient light source 30 is reflected back by the reflecting unit 103 of the reflective sub-pixel area RA, so that the image representing the data signal is displayed.

Moreover, when the dual display mode liquid crystal display operates in a penetration and reflection mode, the scan line S1 simultaneously drives the first active matrix T1 and the second active matrix T2 of the pixels (eg, pixels P11) of the same column, The first active matrix T1 and the second active matrix T2 simultaneously receive the data signals sent by the corresponding data lines D1 and D2, so that the first active matrix T1 is opposite to the first liquid crystal capacitor C _LC1 and the first storage capacitor C _ST1 Charging, the second active matrix T2 charges the second liquid crystal capacitor C _LC2 and the second storage capacitor C _ST2 .

It is worth mentioning that the single pixel uses two active matrices T1 and T2 to control the advantages of the transmissive sub-pixel area TA and the reflective sub-pixel area RA, respectively, to reduce leakage current and power consumption. In addition, the second active matrix may include at least two or more thin film transistor switches, double gate thin film transistors or lightly doped thin film transistors.

[Embodiment of Dual Display Mode Liquid Crystal Display]

Referring to FIG. 7, FIG. 7 is a detailed circuit diagram of each pixel of the dual display mode liquid crystal display according to another embodiment of the present invention. The pixel circuit of the dual display mode liquid crystal display of FIG. 7 is different from the pixel circuit of the dual display mode liquid crystal display of FIG. 6 in that, in this embodiment, only one data line D1 is assigned to each row of pixels, and each column The pixels are assigned two scanning lines S1, S2. The gate G of the first active matrix T1 of each pixel (for example, pixel P ₁₁ ) is electrically coupled to one of the two scan lines, such as the scan line S1 (ie, the first scan line), and the source S thereof The corresponding data line D1 is electrically coupled, and the drain D is electrically coupled to the other end of the corresponding first storage capacitor C _ST1 and the corresponding first sub-electrode 105. The gate G of the second active matrix T2 of each pixel (for example, pixel P ₁₁ ) is electrically coupled to the other scan line S2 (ie, the second scan line) of the two scan lines, and the source S thereof corresponds to The data line D1 is electrically coupled, and the drain D is electrically coupled to the other end of the corresponding second storage capacitor C _ST2 and the corresponding second secondary electrode 106.

Therefore, when the dual display mode liquid crystal display operates in the penetrating mode, the data line D1 simultaneously sends the data signal to the first active matrix T1 and the second active matrix T2 of the same pixel, but only the same column of pixels An active matrix T1 is driven (turned on) by the scan line S1 (ie, the first scan line) to input the data signal into the first active matrix T1, and charge the first storage capacitor C _ST1 and the first liquid crystal capacitor C _LC1 . Therefore, the liquid crystal molecules in the first liquid crystal display layer LC1 of the transmissive sub-pixel area TA can be appropriately deflected to adjust the backlight (not shown) passing through the transmissive sub-pixel area TA to make the representative data signal The image is displayed, and since the transmissive sub-pixel area TA is a wide viewing angle alignment structure using the marginal electric field switching mode, the viewing angle of the dual display mode liquid crystal display is increased. In this embodiment, the transmissive sub-pixel area TA is a wide viewing angle alignment structure using a marginal electric field switching mode, but in practice, the transmissive sub-pixel area TA may also be configured to enhance the transverse electric field mode and the super transverse electric field. The mode or the enhanced marginal electric field switching mode is not limited in this embodiment.

Then, when the dual display mode liquid crystal display operates in the reflective mode, the data line D1 simultaneously sends the data signal to the first active matrix T1 and the second active matrix T2 of the same pixel, but only the second active of the same column of pixels The matrix T2 is driven (turned on) by the scan line S2 (ie, the second scan line), so that the data signal is input to the second active matrix T2, so that the second active matrix T2 charges the second storage capacitor C _ST2 and the second liquid crystal capacitor C _{LC2 .} The liquid crystal molecules in the second liquid crystal display layer LC2 of the reflective sub-pixel area RA are appropriately deflected. Thereby, the external ambient light source (not shown) which enters the reflective sub-pixel area RA and is reflected back by the reflection unit 103 of the reflective sub-pixel area RA can be adjusted to display the image representing the data signal.

Furthermore, when the dual display mode liquid crystal display operates in a penetration and reflection mode, the first active matrix T1 and the second active matrix T2 of the same row of pixels simultaneously receive a data sent by the corresponding data line D1. a signal, and the first active matrix T1 of the same column of pixels is driven (conducted) by the corresponding scan line S1 (ie, the first scan line), and the second active matrix T2 of the same column of pixels is corresponding to the scan line S2 (ie, the second scan line) is driven (conducted). Therefore, the first active matrix T1 and the second active matrix T2 are respectively charged to the first storage capacitor C _ST1 and the first liquid crystal capacitor C _LC1 and the second storage capacitor C _ST2 and the second liquid crystal capacitor C _LC2 .

It is worth mentioning that the second active matrix may include at least two or more thin film transistor switches, double gate thin film transistors or lightly doped thin film transistors.

[Embodiment of Dual Display Mode Liquid Crystal Display]

Referring to FIG. 8 again, FIG. 8 is a detailed circuit diagram of each pixel of the dual display mode liquid crystal display according to another embodiment of the present invention. The dual display mode liquid crystal display of FIG. 8 is different from the dual display mode liquid crystal display of FIG. 7 in that each pixel further includes a third active matrix T3, the gate G thereof and the scan line S2 in the two scan lines. The source S is electrically coupled to the other end of the corresponding first storage capacitor C _ST1 , and the drain D is electrically coupled to the source S of the corresponding second active matrix T2 .

Therefore, when the dual display mode liquid crystal display operates in the reflective mode, the scan line S2 (ie, the second scan line) simultaneously drives the second active matrix T2 and the third active matrix T3 that turn on the same column of pixels to make the first storage. The capacitor C _ST1 and the second storage capacitor C _ST2 are connected in parallel to each other, thereby increasing the storage capacity of the reflective sub-pixel area RA. When the storage capacity of the reflective sub-pixel area RA increases, a large amount of charge can be stored, and a lower update frequency can be used in operation, thereby saving power required for the operation of the reflective sub-pixel area RA. Accordingly, the storage capacity of the reflective sub-pixel area RA can be adjusted, and the first display mode and the second display mode can also have an update frequency lower than 20 Hz (Hertz).

It is worth mentioning that the first liquid crystal capacitor C _{LC1 is} related to the first storage capacitor C _ST1 and the second liquid crystal capacitor C _LC2 and the second storage capacitor C _ST2 , and the formula is as follows:

Wherein C _{lc 1} represents a capacitance value of the first liquid crystal capacitor; C _{st 1} represents a capacitance value of the first storage capacitor; C _{lc 2} represents a capacitance value of the second liquid crystal capacitor; C _{st 2} represents a capacitance of the second storage capacitor Capacitance value. Therefore, the storage capacity of the reflective sub-pixel area RA can be configured by arranging the number of active matrices in series or in parallel with the first storage capacitor C _ST1 and the second storage capacitor C _ST2 .

In addition, since the first display mode of the transmissive sub-pixel area TA adopts the multi-domain segmentation arrangement mode, the transverse electric field mode, the enhanced transverse electric field mode, the super transverse electric field mode or the enhanced marginal electric field switching mode described in the foregoing embodiments. Or the like, which is all black when no voltage is applied, that is, it is normally black, and gradually brightens as the voltage increases, and the second display mode of the reflective sub-pixel area RA adopts the foregoing embodiment. The reflective twisting arrangement mode, the reflective electronically controlled birefringence mode, the hybrid torsional arrangement mode, or the reflective optical compensation mode, etc., which are fully bright when no voltage is applied, that is, normally white, and Darkens as the voltage increases.

Therefore, the gamma curve generated by the first display mode of the transmissive sub-pixel area TA and the second display mode of the reflective sub-pixel area RA is reversed. In other words, the first display mode may have a first gamma transmittance-grayscale-voltage conversion curve or a first comparison table corresponding to the transmittance-grayscale-voltage conversion according to different liquid crystal alignment modes, and the second The display mode has a second gamma reflectance-grayscale-voltage conversion curve or a second comparison table corresponding to reflectance-grayscale-voltage conversion. The first gamma transmittance-grayscale-voltage conversion curve and the second gamma reflectance-grayscale-voltage conversion curve are inverse curves. Those of ordinary skill in the art should be able to infer from the above description that the first gamma-grayscale-voltage-transmission conversion curve of the first display mode and the second gamma-grayscale-voltage-transmission of the second display mode The actual configuration of the rate conversion curve is not described here.

[Possible effects of the examples]

In summary, the embodiment of the present invention provides a dual display mode liquid crystal display, which can be provided with a transmissive sub-pixel area and a reflective sub-pixel area respectively in each pixel. A liquid crystal alignment structure with a wide viewing angle is disposed in the transmissive sub-pixel region, so that the dual display mode liquid crystal display can increase the viewing angle and achieve the function and purpose of wide viewing angle when operating in the penetrating mode.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

100‧‧‧Active matrix substrate

101‧‧‧Transparent substrate

102‧‧‧ pixel electrodes

1021, 1022‧‧‧ secondary electrodes

103‧‧‧Reflective unit

104, 104'‧‧‧Insulation

105, 105'‧‧‧ first electrode

106‧‧‧second electrode

200‧‧‧Upper substrate

300‧‧‧LCD layer

11, 12‧‧‧ First alignment film structure

13‧‧‧Protrusions

14‧‧‧Slit

21, 22‧‧‧ second alignment film structure

30‧‧‧External ambient light source

31‧‧‧Electrode lines

32‧‧‧Bending electrode line

40‧‧‧ Backlight

LC1‧‧‧First LCD display layer

LC2‧‧‧Second LCD display layer

C _LC1 ‧‧‧First LCD Capacitor

C _LC2 ‧‧‧Second liquid crystal capacitor

C _ST ‧‧‧ storage capacitor

C _ST1 ‧‧‧First storage capacitor

C _ST2 ‧‧‧Second storage capacitor

P ₁₁ , P ₁₂ , P ₂₁ , P ₂₂ ‧ ‧ pixels

T‧‧‧Active Matrix

T1‧‧‧First Active Matrix

T2‧‧‧ second active matrix

T3‧‧‧ third active matrix

D‧‧‧ Active matrix bungee

Source of S‧‧‧ active matrix

Gate of the G‧‧‧ active matrix

TA‧‧‧Transparent sub-picture area

RA‧‧‧Reflective sub-pixel area

Vcom‧‧‧ common electrode

Vcom1, Vcom1'‧‧‧ first common electrode

Vcom2‧‧‧Second common electrode

X, Y, Z‧‧‧ axial

S1, S2, S3‧‧‧ scan lines

D1, D2, D3‧‧‧ data lines

1 is a cross-sectional view of a pixel side of a dual display mode liquid crystal display according to an embodiment of the present invention, wherein a transmissive sub-pixel region is displayed by using a vertically-aligned alignment structure in which a reflection is displayed. The pixel region is a reflective vertical alignment mode (Reflective Vertically Aligned) or a so-called Inversed Twisted Nematic alignment structure. FIG. 2 is a dual display mode liquid crystal according to an embodiment of the present invention. FIG. 3 is a schematic cross-sectional view showing a pixel side of a dual display mode liquid crystal display according to another embodiment of the present invention, wherein the transmissive sub-pixel area is switched by an enhanced marginal electric field. (Fringe-Field Effect) alignment structure, and the first common electrode of the transmissive sub-pixel region is disposed on the upper surface of the active matrix substrate, and the second common electrode of the reflective sub-pixel region is disposed on the lower surface of the upper substrate FIG. 4 is a schematic structural diagram of a pixel provided by an embodiment of the present invention, in which a single pixel is allocated with two data lines for separately controlling respectively. An active matrix of the transmissive sub-pixel region and the reflective sub-pixel region, and the first common electrode of the transmissive sub-pixel region and the second common electrode of the reflective sub-pixel region are disposed on different surfaces FIG. 5 is a cross-sectional view of a pixel side of a dual display mode liquid crystal display according to another embodiment of the present invention, wherein the through-sub-pixel area is an In-Plane Switching (IPS) alignment structure. And a part of the pixel electrode and the first common electrode located in the transmissive sub-pixel area TA are The second common electrode is disposed on the upper surface of the upper substrate, and the second common mode is provided on the lower surface of the upper substrate. FIG. 6 is a dual display mode liquid crystal according to another embodiment of the present invention. A detailed circuit diagram of each pixel of the display, wherein each pixel is controlled by two data lines to control the active matrix of the transmissive sub-pixel region and the reflective sub-pixel region, respectively, and the penetrating sub-pixel region FIG. 7 is a detailed circuit diagram of each pixel of the dual display mode liquid crystal display according to another embodiment of the present invention, wherein each pixel is displayed by two scans. The lines respectively control the active matrix of the transmissive sub-pixel region and the reflective sub-pixel region, and the transmissive sub-pixel region and the reflective sub-pixel region are respectively provided with a storage capacitor; and FIG. 8 is the present invention. A detailed circuit diagram of each pixel of the dual display mode liquid crystal display provided by an embodiment, wherein each pixel is controlled by two scan lines to respectively control the first of the transmissive sub-pixel area and the reflective sub-pixel area Active matrix and two active Array, and the transmissive sub-pixel area and the reflective sub-pixel area are respectively provided with a storage capacitor, and the pixel also has a third active matrix, which is controlled by the scan line of the second active matrix, and Simultaneously conducting with the second active matrix, so that the two storage capacitors are connected in parallel.

100‧‧‧Active matrix substrate

101‧‧‧Transparent substrate

102‧‧‧ pixel electrodes

1021, 1022‧‧‧ secondary electrodes

103‧‧‧Reflective unit

104‧‧‧Insulation

200‧‧‧Upper substrate

300‧‧‧LCD layer

11, 12‧‧‧ First alignment film structure

13‧‧‧Protrusions

14‧‧‧Slit

21, 22‧‧‧ second alignment film structure

30‧‧‧External ambient light source

40‧‧‧ Backlight

LC1‧‧‧First LCD display layer

LC2‧‧‧Second LCD display layer

TA‧‧‧Transparent sub-picture area

RA‧‧‧Reflective sub-pixel area

Vcom‧‧‧ common electrode

X, Y, Z‧‧‧ axial

Claims (20)

A dual display mode liquid crystal display includes: an active matrix substrate; an upper substrate disposed above the active matrix substrate; a liquid crystal display layer sandwiched between the active matrix substrate and the upper substrate; and a plurality of Forming a pixel between the active matrix substrate and the upper substrate, each of the pixels having at least a first region and a second region; the first region having at least one transmissive sub-pixel region The second region has at least one reflective sub-pixel region, and the transmissive sub-pixel region has a first display mode, and the reflective sub-pixel region has a second display mode, wherein the first display mode Transmissive Vertically Aligned, Multi-Domain Aligned, In Plane Switching, Fringe Field Switching, or Surface Enhanced Electric Field Mode ( Surface Enhanced Fringe Field); the second display mode is Reflective Twisted Nematic, Reflective Electronically Controlled Birefringence Mode (Reflective El) Ectrically Controlled Birefringence), Mixed Mode Twisted Nematic, Reflective Optical Compensation, or Reflective Vertically Aligned; wherein the first display mode is a transverse electric field mode , marginal electric field switching mode or In the surface-enhanced electric field mode, each of the pixels has a first electrode located on the transmissive sub-pixel region on the active matrix substrate, and on a surface of a transparent substrate of the active matrix substrate a first common electrode is disposed at a position where the primary electrodes are staggered, and each of the pixels further has a second electrode located in the reflective sub-pixel region, and is located under the substrate above the reflective sub-pixel region a second common electrode is disposed on the surface, and the first common electrode is electrically coupled to the second common electrode, wherein the first secondary electrode and the second secondary electrode form a pixel electrode, wherein the first common electrode and the first common electrode Part of the pixel electrodes are blocked by an insulating layer; the first common electrode is comb-like or grid-like, surrounded or curved, and includes an electrode line on one side of the partial pixel electrode and a plurality of a curved electrode line extending toward the central region of the portion of the pixel electrode; wherein the active matrix substrate has a plurality of scan lines and a plurality of data lines interlaced with the scan lines, wherein each row of pixels is assigned at least two Data line, and each column Having at least one scan line, each of the pixels includes a first storage capacitor and a first active matrix corresponding to the transmissive sub-pixel region and a second corresponding to the reflective sub-pixel region a storage capacitor and a second active matrix; one end of each of the first storage capacitors is electrically coupled to the corresponding first common electrode, and one end of each of the second storage capacitors is electrically coupled to the corresponding second common electrode; The first active matrix is electrically coupled to the scan line, wherein one of the data lines and the first storage capacitor; each of the second active matrix is electrically coupled to the other data line of the scan line and the first Two storage capacitors. The dual display mode liquid crystal display according to claim 1, wherein the first display mode is a transmissive vertical alignment alignment mode, a multi-domain division alignment mode, a transverse electric field mode, a marginal electric field switching mode, or a surface enhanced electric field mode. The first display mode includes two first alignment film structures respectively disposed on the upper surface of the active matrix substrate and the lower surface of the upper substrate, and corresponding to the transmissive sub-pixel region, so as to be interposed The liquid crystal molecules therebetween form a first liquid crystal display layer; the second display mode is a reflective twist arrangement, a reflective electronically controlled birefringence, a mixed torsion arrangement, a reflective optical compensation or a reflective vertical alignment, and the second display mode And a second alignment film structure respectively disposed on the upper surface of the active matrix substrate and the lower surface of the upper substrate, and corresponding to the reflective sub-pixel region, so as to form liquid crystal molecules interposed therebetween a second liquid crystal display layer. The dual display mode liquid crystal display of claim 2, wherein the first liquid crystal display layer is a horizontally arranged positive liquid crystal or a negative liquid crystal or a vertically arranged negative liquid crystal, and the second liquid crystal display layer It is a horizontally arranged positive liquid crystal or a negative liquid crystal or a vertically arranged negative liquid crystal. The dual display mode liquid crystal display of claim 2, wherein the first alignment film structure and the second alignment film structure are the same material or a similar structure material or a high molecular polymer. A dual display mode liquid crystal display as described in claim 2, The first alignment structure has a first alignment direction such that liquid crystal molecules on the first alignment structure are sequentially arranged along the first alignment direction, and the second alignment structure has a second alignment direction, such that the first alignment direction The liquid crystal molecules on the two alignment structures are arranged in the second alignment direction, wherein the first alignment direction and the second alignment direction are the same alignment direction or a specific angle alignment direction or a vertical alignment direction. The dual display mode liquid crystal display according to claim 1, wherein when the first display mode is a transverse electric field mode, a marginal electric field switching mode or a surface enhanced electric field mode, the lower surface of the upper substrate is further dispersed and disposed respectively. Extending across the common electrodes of the corresponding columns of the pixels, the common electrodes are not located on the lower surface of the upper substrate of the first region, but only on the lower surface of the upper substrate of the second region. The dual display mode liquid crystal display of claim 1, wherein the first display mode has one of a bending electric field formed by the liquid crystal display layer, the first common electrode of the active matrix substrate, and the pixel electrode. a first liquid crystal capacitor; the second display mode has a second liquid crystal capacitor formed by an electric field of the liquid crystal display layer, the second common electrode of the upper substrate, and the pixel electrode of the active matrix substrate, and each of the The first area of the pixel has at least one first storage capacitor, and the second area has at least one second storage capacitor, wherein the first liquid crystal capacitor and the first storage capacitor and the second liquid crystal capacitor and the first The second storage capacitor is related, and its formula is as follows: Wherein C _{lc 1} represents a capacitance value of the first liquid crystal capacitor; C _{st 1} represents a capacitance value of the first storage capacitor; Cl _{c 2} represents a capacitance value of the second liquid crystal capacitor; C _{st 2} represents a capacitance of the second storage capacitor Capacitance value. The dual display mode liquid crystal display of claim 7, wherein the first region of each pixel has at least a first gamma transmittance-grayscale-voltage conversion curve or a first comparison table. The second region has at least a second gamma reflectance-grayscale-voltage conversion curve or a second comparison table. The dual display mode liquid crystal display of claim 8, wherein the first gamma transmittance-grayscale-voltage conversion curve and the second gamma reflectance-grayscale-voltage conversion curve are opposite The curve of the direction. The dual display mode liquid crystal display of claim 1, wherein the first active matrix and the second active matrix of the pixels in the same column when the dual display mode liquid crystal display operates in a penetrating mode The first active matrix receives a data signal sent by the corresponding data line and charges the first storage capacitor; when the dual display mode liquid crystal display works in a reflection In the mode, the first active matrix and the second active matrix of the pixel of the same column are simultaneously driven by the corresponding scan line, and the second active matrix receives the corresponding data signal sent by the data line, and Second storage Capacitor; when the dual display mode liquid crystal display operates in a penetration and reflection mode, the first active matrix and the second active matrix of each pixel of the same column are simultaneously driven by the corresponding scan line, the first An active matrix and the second active matrix receive the corresponding data signal sent by the data line, and the first active matrix and the second active matrix respectively charge the first storage capacitor and the second storage capacitor. The dual display mode liquid crystal display of claim 7, wherein the active matrix substrate has a plurality of scan lines and a plurality of data lines interlaced with the scan lines, wherein each row of pixels is assigned at least one data line. Each column of pixels is assigned at least two scan lines, and each of the pixels includes a first active matrix corresponding to the transmissive sub-pixel region and a corresponding one of the reflective sub-pixel regions a second active matrix, wherein the first active matrix of each pixel is electrically coupled to one of the scan lines, the data line and the first storage capacitor; each of the second active matrix is electrically coupled to another scan line and the data line And the second storage capacitor. The dual display mode liquid crystal display of claim 11, wherein the first active matrix and the second active of each pixel of the same row when the dual display mode liquid crystal display operates in a penetrating mode The matrix simultaneously receives a data signal sent by the data line, and the first active matrix of each pixel of the same column is driven to be turned on by a first scan line of the scan lines, so that the data signal is input into the first active a matrix and charging the first storage capacitor; when the dual display mode When the liquid crystal display operates in a reflection mode, the first active matrix and the second active matrix of each pixel of the same row simultaneously receive the data signal sent by the data line, and the pixel of the same column The second active matrix is driven to be turned on by a second scan line of the scan lines, so that the data signal is input to the second active matrix to charge the second storage capacitor; when the dual display mode liquid crystal display works in a penetration In the cum-reflection mode, the first active matrix and the second active matrix of the pixels of the same row simultaneously receive a data signal sent by the data line, and the first active matrix of each pixel of the same column and The second active matrix is driven to be turned on by a first scan line and a second scan line of the scan lines. The dual display mode liquid crystal display according to any one of claims 1 to 10, wherein the second active matrix is a thin film transistor switch or a double gate film comprising at least two or more A transistor or a lightly doped thin film transistor. The dual display mode liquid crystal display of claim 11, wherein each of the pixels further comprises a third active matrix, the galvanic connection is one of the two scan lines, the first storage capacitor and the second An active matrix, and when the dual display mode liquid crystal display operates in a reflective mode, the second active matrix of the pixels of the same column and the second active matrix are corresponding to a second scan of the scan lines The wires are simultaneously driven to connect the first storage capacitor in parallel with the second storage capacitor to increase the storage capacity of the reflective sub-pixel region. The dual display mode liquid crystal display according to any one of claims 1 to 7, wherein the pixel electrode, the first electrode, the second electrode, The first common electrode and the second common electrode are ITO, IZO, metal or alloy. The dual display mode liquid crystal display of claim 1, wherein the dual display mode liquid crystal display has a backlight module, wherein the backlight module has a dimming according to an ambient light source and according to the first display mode and / or the second display mode works to switch states to dim or turn on/off the function of the backlight drive architecture. The dual display mode liquid crystal display of claim 1, wherein the driving method of the first display mode and the second display mode further comprises a dot inversion drive and a line inversion drive. Or a frame inversion driver. The dual display mode liquid crystal display of claim 17, wherein the first display mode and/or the second display mode have different update frequencies. The dual display mode liquid crystal display of claim 17, wherein the first display mode and/or the second display mode has two or more update frequencies. A dual display mode liquid crystal display as described in claim 17 of the patent application, Wherein the first display mode and/or the second display mode have an update frequency below 20 Hertz (Hz).