CN1544978A - Pixel structure of transflective liquid crystal display panel - Google Patents

Abstract

A transflective liquid crystal display panel pixel structure comprises an upper substrate and a lower substrate. The upper surface of the lower substrate can be divided into a reflection region covered with a reflection layer and a transmission region. The mixed nematic liquid crystal molecular layer is sandwiched between the upper and lower substrates. The first pixel electrode and the first common electrode are formed on the reflective region at a first predetermined distance to generate a transverse electric field to drive the liquid crystal molecules to turn. The second pixel electrode and the second common electrode are formed on the transmission region at a second predetermined distance to generate a transverse electric field to drive the liquid crystal molecules to turn. And the first predetermined distance is greater than the second predetermined distance. Therefore, when an operating voltage is input to the pixel structure, the phase delay generated by the liquid crystal molecular layer on the reflection region is smaller than that generated by the liquid crystal molecular layer on the transmission region.

Description

Pixel Structure of Transflective LCD Panel

technical field

The invention relates to a pixel structure of a liquid crystal display panel, in particular to a pixel structure of a transflective liquid crystal display panel.

Background technique

With the rapid progress of thin-film transistor production technology, liquid crystal displays are widely used in personal digital assistants, notebook computers, digital cameras, camcorders, mobile phones and other fields due to their advantages of lightness, lightness, power saving, and radiation-free. in electronic products. However, since the liquid crystal display is a non-self-illuminating display, traditionally, a cold cathode lamp is used as a backlight source, and the light generated passes through optical film layers such as a diffusion film and a polarizer to form a uniform plane. Light enters the liquid crystal display panel to present images.

Generally speaking, less than 10% of the light generated by the backlight can pass through the liquid crystal display panel and be used for display, and the rest of the light energy is absorbed during the process of penetrating through the optical film layer and the liquid crystal display panel. In order to solve the above-mentioned problems, reflective liquid crystal displays have been developed. The reflective liquid crystal display uses ambient light instead of the backlight, so there is no need to install cold cathode lamps and related optical films in the display. In this way, in addition to saving energy consumption of the display, the size and weight of the display can be reduced. However, when the surrounding environment is dark, the reflective liquid crystal display cannot obtain enough ambient light, which will greatly reduce the display effect.

In order to overcome the above-mentioned problems, transflective liquid crystal displays have been developed. The transflective liquid crystal display has the functions of the transmissive and reflective liquid crystal displays at the same time, and can use ambient light or backlight as illumination according to requirements. Therefore, when the ambient light is sufficient, you can choose to use the ambient light for lighting to save energy consumption. When the ambient light is insufficient, you can choose to use the backlight for lighting to obtain the ideal display effect.

Please refer to FIG. 1 , which shows the pixel structure of a typical black matrix (Normal Black, NB) transflective LCD. It includes an upper substrate 100 , a lower substrate 300 and a liquid crystal molecule layer 200 sandwiched between the upper and lower substrates 100 and 300 . The upper substrate 100 has a glass substrate 108 as the main body. The upper surface of the glass substrate 108 is sequentially fabricated with a quarter-wave plate 106 and a first polarizing film 104, and its lower surface is sequentially fabricated with a color filter layer. 102 and common electrode 110. The lower substrate has a glass substrate 308 as the main body. A quarter-wave plate 306 and a second polarizing film 304 are sequentially fabricated on the lower surface of the glass substrate 308, and a reflector 314 is fabricated on the upper surface, so as to distinguish between A reflective area covered with a reflective plate 314 and a transmissive area. In addition, a pixel electrode 310 is fabricated on the reflection area and the transmission area, and covers the reflection plate 314 . The liquid crystal molecules are driven to rotate by the potential difference between the common electrode 110 and the pixel electrode 310 to achieve the purpose of display.

Please refer to FIG. 2A and FIG. 2B , which are schematic diagrams showing the operation of the transflective liquid crystal display panel in FIG. 1 when no operating voltage is applied. As shown in FIG. 2A, in the reflection region, ambient light A first penetrates the first polarizing film 104 to form linearly polarized light A1, and then penetrates the quarter-wave plate 106, because the quarter-wave plate 106 There is an angle of 45 degrees between the direction of the principal axes and the direction of the transmission axis of the first polarizing film. Therefore, the linearly polarized light A1 forms a circularly polarized light A2 and passes through the quarter-wave plate 106 . When the operating voltage is not applied, the liquid crystal molecular layer (not shown) will not affect the circularly polarized light A2. Therefore, after the circularly polarized light A2 is reflected by the reflector 314, it is still in the form of circularly polarized light. , into the quarter-wave plate 106 . Subsequently, the formed linearly polarized light A3 passes through the quarter-wave plate 106 . It should be noted that the electric field polarization direction of the linearly polarized light A3 is perpendicular to the electric field polarization direction of the linearly polarized light A1, that is, perpendicular to the transmission axis direction of the first polarizing film 104, therefore, the linearly polarized light A3 cannot pass through The first polarizing film 104 reflects the display panel.

As shown in FIG. 2B, in the penetrating region, the backlight B first penetrates the second polarizing film 304 to form linearly polarized light B1, and then sequentially penetrates the quarter-wave plate 306, the liquid crystal molecular layer (not shown) and Quarter-wave plate 106, because the liquid crystal molecules will not affect the linearly polarized light B1 when no operating voltage is applied, and the fast axis (fast axis) of quarter-wave plate 306 and 106 ) directions are perpendicular to each other, causing the phase retardation (retardation) effect produced by the linearly polarized light B1 to cancel each other out, so that the linearly polarized light B2 passing through the quarter-wave plate 106 has the same polarization direction as the linearly polarized light B1 same. In addition, since the transmission axis directions of the first polarizing film 104 and the second polarizing film 304 are perpendicular to each other, the linearly polarized light B2 cannot pass through the first polarizing film 104 and exit the display panel.

Please refer to FIG. 3A and FIG. 3B , which are schematic diagrams showing the operation of the transflective liquid crystal display panel in FIG. 1 when the operating voltage is applied. As shown in FIG. 3A , in the reflection region, ambient light A first penetrates the first polarizing film 104 to form linearly polarized light A4, and then penetrates the quarter-wave plate 106, because the quarter-wave plate 106 There is an angle of 45 degrees between the main axis direction and the transmission axis direction of the first polarizing film 104 , therefore, the linearly polarized light A4 forms a circularly polarized light A5 to pass through the quarter-wave plate 106 . The circularly polarized light A5 sequentially penetrates the liquid crystal molecular layer 200 , is reflected by the reflector 314 , and then penetrates the liquid crystal molecular layer 200 again. In the case of optimal reflective display, by adjusting the appropriate operating voltage value and the thickness of the liquid crystal layer, the liquid crystal molecule layer 200 can produce a phase retardation effect equivalent to a quarter wavelength. Coupled with the effect of reflection, the circularly polarized light A6 having the same polarization direction as the circularly polarized light A5 passes through the liquid crystal molecule layer 200 . Subsequently, the circularly polarized light A6 forms linearly polarized light A7 and passes through the quarter-wave plate 106 . It should be noted that the polarization direction of the linearly polarized light A7 is the same as the direction of the transmission axis of the first polarizing film 104, therefore, the linearly polarized light A7 can be prevented from being shielded by the first polarizing film 104 to obtain the most efficient reflective display Effect.

As shown in FIG. 3B , in the penetrating region, the backlight B first penetrates the second polarizing film 304 to form linearly polarized light B3, and then sequentially penetrates the quarter-wave plate 306, the liquid crystal molecular layer 200 and the quarter wave plate. A wave board 106. In the case of optimal transmissive display, by adjusting an appropriate operating voltage value, the above-mentioned liquid crystal molecule layer 200 can produce a phase retardation equivalent to one-half wavelength. Therefore, the polarization direction of the linearly polarized light B4 passing through the quarter-wave plate 106 is perpendicular to the linearly polarized light B3 . In addition, since the transmission axis directions of the first polarizing film 104 and the second polarizing film 304 are perpendicular to each other, the linearly polarized light B4 can be prevented from being shielded by the first polarizing film 104 to obtain the most efficient transmission display effect.

In general, please refer to FIG. 1 , in the reflective area and the transmissive area of a typical transflective liquid crystal display panel, the distance between the pixel electrode 310 and the common electrode 110 is approximately the same. Therefore, the electric field intensity generated by the operating voltage in the reflective region and the transmissive region is roughly the same. However, as mentioned above, in the case of an optimal reflective display, the liquid crystal molecular layer 200 must produce a phase retardation effect equivalent to a quarter wavelength, while in the case of an optimal transmissive display, the liquid crystal molecular layer 200 must produce a phase retardation effect equivalent to a quarter wavelength. Equivalent to the phase retardation effect of one-half wavelength. Therefore, it is impossible to meet the requirements of the best reflective display and the best see-through display at the same time, but a compromise must be made between the two.

In view of this, the present invention proposes a pixel structure of a transflective liquid crystal display, by providing different electric field strengths in the reflective area and the transmissive area, so as to meet the above-mentioned optimal reflective display and optimal transmissive display at the same time. Require.

Contents of the invention

The purpose of the present invention is to improve the display effect of the transflective liquid crystal display by changing the electric field strength of the reflective region and the transmissive region, so that the liquid crystal molecular layer produces different phase delays in the reflective region and the transmissive region.

The above object of the present invention is achieved by the following technical solutions.

A pixel structure of a transflective liquid crystal display panel, comprising: an upper substrate;

The lower substrate is fabricated under the upper substrate, and the upper surface of the lower substrate is divided into a reflective area covered with a reflective layer and a penetrating area; its features are:

A mixed nematic liquid crystal molecular layer is sandwiched between the upper and lower substrates;

A first pixel electrode and a first common electrode are fabricated on the reflective area with a first predetermined distance apart to generate a transverse electric field to drive liquid crystal molecules to turn;

A second pixel electrode and a second common electrode are fabricated on the penetrating region and separated by a second predetermined distance to generate a transverse electric field to drive the liquid crystal molecules to turn, and the first predetermined distance is greater than the second predetermined distance distance;

When an operating voltage is input into the pixel structure, the phase retardation generated by the liquid crystal molecule layer on the reflection area is smaller than that of the liquid crystal molecule layer on the transmission area.

The pixel structure of the transflective liquid crystal display panel is characterized in that: before the operating voltage is input, the hybrid nematic liquid crystal molecular layer is preset with a quarter-wavelength phase retardation effect to generate a quarter-wavelength One of the functions of the wave board.

The pixel structure of the transflective liquid crystal display panel is characterized in that: a first alignment film is formed on the lower surface of the upper substrate, and a second alignment film is formed on the upper surface of the lower substrate, and the first The pretilt angle of the second alignment film is greater than that of the first alignment film, so that the nematic liquid crystal molecules between the upper and lower substrates are arranged in a mixed state.

The pixel structure of the transflective liquid crystal display panel is characterized in that: a first alignment film is formed on the lower surface of the upper substrate, and a second alignment film is formed on the upper surface of the lower substrate, and the first The pretilt angle of the second alignment film is smaller than that of the first alignment film, so that the nematic liquid crystal molecules between the upper and lower substrates are arranged in a mixed state.

The pixel structure of the transflective liquid crystal display panel is characterized in that: a lateral alignment film is formed on the lower surface of the upper substrate, and a vertical alignment film is formed on the upper surface of the lower substrate, so as to make the upper and lower substrates Nematic liquid crystal molecules are arranged in a hybrid state.

The pixel structure of the transflective liquid crystal display panel is characterized in that: a vertical alignment film is formed on the lower surface of the upper substrate, and a lateral alignment film is formed on the upper surface of the lower substrate, so as to make the upper and lower substrates Nematic liquid crystal molecules are arranged in a hybrid state.

The pixel structure of the transflective liquid crystal display panel is characterized in that: the lower substrate includes a quarter-wave plate made on the lower surface of a glass substrate.

The pixel structure of the transflective liquid crystal display panel is characterized in that: the upper substrate includes a first polarizing film made on the upper surface of a glass substrate, and the lower substrate includes a quarter-wave plate and a second polarizing film. The film is fabricated on the lower surface of a glass substrate from top to bottom, and the polarization directions of the second polarizing film and the second polarizing film are perpendicular to each other.

The pixel structure of the transflective liquid crystal display panel is characterized in that: the upper substrate includes a half-wave plate made under the first polarizing film, and the lower substrate includes a half-wave plate made under the on the second polarizing film.

The pixel structure of the transflective liquid crystal display panel is characterized in that: the two pixel electrodes and the two common electrodes are both made of indium tin oxide.

The pixel structure of the transflective liquid crystal display panel is characterized in that: the two pixel electrodes and the two common electrodes are formed as elongated protrusions on the lower substrate.

The pixel structure of the transflective liquid crystal display panel is characterized in that it is a transflective liquid crystal display applied to a black matrix.

A pixel structure of a transflective liquid crystal display panel, comprising:

An upper substrate, including a first polarizing film fabricated on the upper surface of the upper substrate;

The lower substrate is fabricated under the upper substrate. The lower substrate includes a quarter-wave plate and a second polarizing film fabricated on the lower surface of the lower substrate from top to bottom, and the upper surface of the lower substrate can be divided into A reflective area covered with a reflective layer and a penetrating area; its features are:

A mixed nematic liquid crystal molecular layer is sandwiched between the upper and lower substrates, and exhibits a phase retardation equivalent to a quarter wavelength;

A first pixel electrode and a first common electrode are fabricated on the reflective area in the form of elongated protrusions, separated by a first predetermined distance, to generate a transverse electric field to drive the liquid crystal molecules to turn;

A second pixel electrode and a second common electrode are fabricated on the penetrating region in the form of elongated protrusions, separated by a second predetermined distance, to generate a transverse electric field to drive the liquid crystal molecules to turn, and the first predetermined distance is greater than the second predetermined distance;

When an operating voltage is input into the pixel structure, the phase retardation effect of the liquid crystal molecular layer on the reflective area is increased from a quarter wavelength to a half wavelength, and the phase retardation effect of the liquid crystal molecular layer on the transmissive area is The phase delay effect is increased from 1/4 wavelength to 3/4 wavelength to achieve maximum display brightness.

The pixel structure of the transflective liquid crystal display panel is characterized in that: a first alignment film is formed on the lower surface of the upper substrate, and a second alignment film is formed on the upper surface of the lower substrate, and the first The pretilt angle of the second alignment film is greater than that of the first alignment film, so that the nematic liquid crystal molecules between the upper and lower substrates are arranged in a mixed state.

The pixel structure of the transflective liquid crystal display panel is characterized in that: a first alignment film is formed on the lower surface of the upper substrate, and a second alignment film is formed on the upper surface of the lower substrate, and the first The pretilt angle of the second alignment film is smaller than that of the first alignment film, so that the nematic liquid crystal molecules between the upper and lower substrates are arranged in a mixed state.

The pixel structure of the transflective liquid crystal display panel is characterized in that: a lateral alignment film is formed on the lower surface of the upper substrate, and a vertical alignment film is formed on the upper surface of the lower substrate, so as to make the upper and lower substrates Nematic liquid crystal molecules are arranged in a hybrid state.

The pixel structure of the transflective liquid crystal display panel is characterized in that: a vertical alignment film is formed on the lower surface of the upper substrate, and a lateral alignment film is formed on the upper surface of the lower substrate, so as to make the upper and lower substrates Nematic liquid crystal molecules are arranged in a hybrid state.

The pixel structure of the transflective liquid crystal display panel is characterized in that: the upper substrate includes a half-wave plate made under the first polarizing film, and the lower substrate includes a half-wave plate made under the on the second polarizing film.

The pixel structure of the transflective liquid crystal display panel is characterized in that: the two pixel electrodes and the two common electrodes are both made of indium tin oxide.

The pixel structure of the transflective liquid crystal display panel is characterized in that it is a transflective liquid crystal display applied to a black matrix.

The pixel structure of the transflective liquid crystal display panel of the present invention includes an upper substrate and a lower substrate, and the upper surface of the lower substrate is divided into a reflective area covered with a reflective layer and a transmissive area. A mixed nematic liquid crystal molecular layer is sandwiched between the upper and lower substrates. The first pixel electrode and the first common electrode are fabricated on the reflective area and separated by a first predetermined distance, so as to generate a transverse electric field to drive the liquid crystal molecules to turn. The second pixel electrode and the second common electrode are formed on the penetrating region and separated by a second predetermined distance, so as to generate a transverse electric field to drive the liquid crystal molecules to turn. Moreover, the first predetermined distance is greater than the second predetermined distance. Therefore, when an operating voltage is input to the pixel structure, the phase delay effect produced by the liquid crystal molecular layer on the reflective area is smaller than that of the liquid crystal molecular layer on the transmissive area.

Compared with the traditional transflective liquid crystal display, the present invention has the following advantages:

1. In the pixel structure of the transflective liquid crystal display of the present invention, by adjusting the size of the first predetermined distance and the second predetermined distance, transverse electric fields E1 and E2 of different intensities can be generated in the reflection area and the transmission area. In this way, the mixed nematic liquid crystal molecular layers in the reflective region and the transmissive region can produce phase delays of different sizes, so as to meet the requirements of the best reflective display and the best transmissive display respectively.

2. When no operating voltage is applied, the hybrid nematic liquid crystal molecular layer of the present invention is preset with a phase retardation equivalent to a quarter wavelength. Therefore, compared with the conventional transflective liquid crystal display in FIG. 1 , the transflective liquid crystal display of the present invention omits the quarter wave plate 106 .

3. The mixed nematic liquid crystal molecular layer used in the present invention has a faster reaction speed than the super twisted nematic liquid crystal molecular layer 200 used in the traditional transflective liquid crystal display, therefore, the liquid crystal display can be improved. display effect.

The advantages and spirit of the present invention can be further understood through the detailed description of the following embodiments combined with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of the pixel structure of a typical black matrix transflective liquid crystal display.

2A and 2B are schematic diagrams of a typical transflective liquid crystal display panel operating when no operating voltage is applied.

FIG. 3A and FIG. 3B are schematic diagrams illustrating the operation of a typical transflective liquid crystal display panel when the operating voltage is applied.

FIG. 4 is a schematic diagram of a preferred embodiment of the pixel structure of the transflective liquid crystal display of the present invention.

5A and 5B are schematic views of the operation of the transflective liquid crystal display panel of the present invention when no operating voltage is applied.

6A and 6B are schematic diagrams of the operation of the transflective liquid crystal display panel of the present invention when the operating voltage is applied.

Detailed ways

Please refer to FIG. 4 , which shows a preferred embodiment of the pixel structure of the transflective liquid crystal display of the present invention. The pixel structure includes an upper substrate 100 , a lower substrate 300 and a nematic liquid crystal molecule layer 400 sandwiched between the upper and lower substrates 100 and 300 . The upper substrate 100 has a glass substrate 108 as a main body. A polarizing film 104 is formed on the upper surface of the glass substrate 108 , and a color filter layer 102 and a first alignment film 120 are sequentially formed on the lower surface. The first alignment film 120 provides the effect of aligning the liquid crystal molecules, so that the long axes of the liquid crystal molecules and the horizontal plane form a first pretilt angle a. The lower substrate 300 has a glass substrate 308 as the main body. A quarter-wave plate 306 and a second polarizing film 304 are sequentially formed on the lower surface of the glass substrate 308, and a reflective plate 314 is formed on the upper surface, so that the The upper surface area of the lower substrate 300 is divided into a reflective area covered with a reflective plate 314 and a transmissive area. In addition, a second alignment film 320 is fabricated on the reflective area and the transmissive area, and covers the reflective plate 314, and makes the long axis of the liquid crystal molecules form a large second pretilt angle b with the horizontal plane.

The first pixel electrode 402 and the first common electrode 404 are formed in the reflective area, located on the second alignment film 320, and separated by a first predetermined distance d1 to generate a lateral electric field E1. The second pixel electrode 406 and the second common electrode 408 are formed in the penetration region, located on the second alignment film 320, and separated by a second predetermined distance d2 to generate a lateral electric field E2. It should be noted that the first predetermined distance d1 is greater than the second predetermined distance d2, therefore, the transverse electric field E1 generated in the reflection region is smaller than the transverse electric field E2 generated in the penetration region.

The second pretilt angle b is close to vertical to provide the effect of vertical alignment of the liquid crystal molecule layer 400 , while the first pretilt angle a is close to horizontal to provide the effect of lateral alignment of the liquid crystal molecule layer 400 . Therefore, between the first alignment film 120 and the second alignment film 320 , the direction of the long axis of the liquid crystal molecules gradually changes from horizontal direction to vertical direction, and presents a hybrid arrangement. In this way, the transverse electric fields E1 and E2 generated between the above two pixel electrodes 402, 406 and the two common electrodes 404, 408 can drive the liquid crystal molecules to turn in the transverse direction, so as to achieve the purpose of display.

As for a preferred embodiment, the above-mentioned two pixel electrodes 402, 406 and two common electrodes 404, 408 can protrude on the lower substrate 300 in a strip shape to provide a uniform lateral electric field. In addition, by appropriately adjusting the distance t between the upper and lower substrates 100 and 300, as well as the size of the first pretilt angle a and the second pretilt angle b, the hybrid nematic (Hybrid Nematic) liquid crystal molecule layer 400 is preset with a phase retardation effect equivalent to a quarter wavelength. Moreover, by adjusting the size of the first predetermined distance d1 and the second predetermined distance d2, when the operating voltage is passed through, the liquid crystal molecule layer 400 in the reflection area produces a phase retardation effect equivalent to half the wavelength, At the same time, the liquid crystal molecule layer 400 in the penetrating region produces a phase retardation effect equivalent to three quarters of the wavelength.

Please refer to FIG. 5A and FIG. 5B , which are schematic diagrams showing the operation of the above transflective liquid crystal display panel of the present invention under the condition that no operating voltage is applied. As shown in FIG. 5A , in the reflection area, the ambient light C first penetrates the first polarizing film 104 to form linearly polarized light C1, and then, the linearly polarized light C1 penetrates the liquid crystal molecular layer 400, and after being reflected by the reflector 314, it again penetrate the liquid crystal molecule layer 400 . As mentioned above, because the liquid crystal molecular layer 400 is preset with a phase retardation effect equivalent to a quarter wavelength. Therefore, the liquid crystal molecular layer 400 provides a phase retardation effect equivalent to one-half wavelength in total, so that the linearly polarized light C1 is converted into linearly polarized light C2 to pass through the liquid crystal molecular layer 400, and the electric field polarization direction of the linearly polarized light C2 is Perpendicular to the linearly polarized light C1. Therefore, the linearly polarized light C2 cannot pass through the first polarizing film 104 and reflect out of the display panel.

As shown in FIG. 5B , in the transmission region, the backlight D first passes through the second polarizing film 304 to form linearly polarized light D1 , and then passes through the quarter-wave plate 306 and the liquid crystal molecule layer 400 in sequence. The quarter-wave plate 306 and the liquid crystal molecule layer 400 are perpendicular to each other in the fast axis directions, so the phase retardation effects on the linearly polarized light D1 cancel each other out. Therefore, the linearly polarized light D2 passing through the liquid crystal molecule layer 400 has the same polarization direction as the linearly polarized light D1 . In addition, since the transmission axis directions of the first polarizing film 104 and the second polarizing film 304 are perpendicular to each other, the linearly polarized light D2 cannot pass through the first polarizing film 104 and exit the display panel.

Please refer to FIG. 6A and FIG. 6B , which show a schematic diagram of the operation of the transflective liquid crystal display panel in FIG. 4 when the operating voltage is applied. As shown in FIG. 6A, in the reflection area, the ambient light C first penetrates the first polarizing film 104 to form linearly polarized light C3, and then the linearly polarized light C3 penetrates the liquid crystal molecular layer 400, and after being reflected by the reflective plate 314, it again penetrate the liquid crystal molecule layer 400 . In the case of optimal reflective display, by adjusting an appropriate operating voltage value, the above-mentioned liquid crystal molecule layer 400 can produce a phase retardation effect equivalent to one-half wavelength. Therefore, the liquid crystal molecule layer 400 provides a phase retardation effect corresponding to one wavelength in total, so that the linearly polarized light C3 forms a linearly polarized light C4 to pass through the liquid crystal molecule layer 400 . It is worth noting that the polarization direction of the linearly polarized light C4 is the same as the transmission axis direction of the first polarizing film 104, therefore, the linearly polarized light C4 can be prevented from being shielded by the first polarizing film 104 to obtain the most efficient reflective display Effect.

As shown in FIG. 6B, in the penetrating region, the backlight D first penetrates the second polarizing film 304 to form linearly polarized light D3, and then penetrates the quarter-wave plate 306, because the quarter-wave plate 306 There is an angle of 45 degrees between the main axis direction and the transmission axis direction of the second polarizing film. Therefore, the linearly polarized light D3 forms a circularly polarized light D4 passing through the quarter-wave plate 306 and penetrating into the liquid crystal molecule layer 400 . In the case of optimal transmissive display, by adjusting an appropriate operating voltage value, the liquid crystal molecule layer 400 can produce a phase retardation effect equivalent to three-quarters of the wavelength. Therefore, the circularly polarized light D4 is transformed into linearly polarized light D5 and passes through the liquid crystal molecule layer 400 . It is worth noting that the fast axis directions of the quarter-wave plate 306 and the liquid crystal molecular layer 400 can be selected so that the phase retardation effects of the liquid crystal molecular layer 400 and the quarter-wave plate 306 cancel each other, so that the linearly polarized light D5 is perpendicular to the linearly polarized light D3. Since the transmission axis directions of the first polarizing film 104 and the second polarizing film 304 are perpendicular to each other, the linearly polarized light D5 can be prevented from being shielded by the first polarizing film 104 to obtain the most efficient transmission display effect.

The above is to use the preferred embodiments to describe the present invention in detail, rather than to limit the scope of the present invention, and those who are familiar with this type of art can understand that it is appropriate to make slight changes and adjustments without losing the gist of the present invention. , nor depart from the spirit and scope of the present invention.

Claims (20)

1. A pixel structure of a transflective liquid crystal display panel, comprising: One upper substrate; The lower substrate is fabricated under the upper substrate, and the upper surface of the lower substrate can be divided into a reflective area covered with a reflective layer and a penetrating area; its features are: A mixed nematic liquid crystal molecular layer is sandwiched between the upper and lower substrates; A first pixel electrode and a first common electrode are fabricated on the reflective area with a first predetermined distance apart to generate a transverse electric field to drive liquid crystal molecules to turn; A second pixel electrode and a second common electrode are fabricated on the penetrating region and separated by a second predetermined distance to generate a transverse electric field to drive the liquid crystal molecules to turn, and the first predetermined distance is greater than the second predetermined distance distance; When an operating voltage is input into the pixel structure, the phase retardation generated by the liquid crystal molecule layer on the reflection area is smaller than that of the liquid crystal molecule layer on the transmission area. 2. The pixel structure of the transflective liquid crystal display panel according to claim 1, characterized in that: before the operating voltage is input, the hybrid nematic liquid crystal molecular layer is preset with a phase delay of 1/4 wavelength effect to produce the functionality of a quarter wave plate. 3. The pixel structure of a transflective liquid crystal display panel according to claim 1, wherein a first alignment film is formed on the lower surface of the upper substrate, and a second alignment film is formed on the upper surface of the lower substrate. film, and the pretilt angle of the second alignment film is larger than the pretilt angle of the first alignment film, so that the nematic liquid crystal molecules between the upper and lower substrates are arranged in a hybrid state. 4. The pixel structure of a transflective liquid crystal display panel according to claim 1, wherein a first alignment film is formed on the lower surface of the upper substrate, and a second alignment film is formed on the upper surface of the lower substrate. film, and the pretilt angle of the second alignment film is smaller than the pretilt angle of the first alignment film, so that the nematic liquid crystal molecules between the upper and lower substrates are arranged in a hybrid state. 5. The pixel structure of a transflective liquid crystal display panel according to claim 1, wherein a lateral alignment film is formed on the lower surface of the upper substrate, and a vertical alignment film is formed on the upper surface of the lower substrate, thereby The nematic liquid crystal molecules between the upper and lower substrates are arranged in a mixed state. 6. The pixel structure of a transflective liquid crystal display panel according to claim 1, wherein a vertical alignment film is formed on the lower surface of the upper substrate, and a lateral alignment film is formed on the upper surface of the lower substrate, thereby The nematic liquid crystal molecules between the upper and lower substrates are arranged in a mixed state. 7. The pixel structure of a transflective liquid crystal display panel according to claim 1, wherein the lower substrate comprises a quarter-wave plate fabricated on the lower surface of a glass substrate. 8. The pixel structure of a transflective liquid crystal display panel according to claim 1, wherein the upper substrate includes a first polarizing film made on the upper surface of a glass substrate, and the lower substrate includes a quarter The wave plate and the second polarizing film are fabricated on the lower surface of a glass substrate from top to bottom, and the polarization directions of the second polarizing film and the second polarizing film are perpendicular to each other. 9. The pixel structure of a transflective liquid crystal display panel according to claim 1, characterized in that: the upper substrate includes a half-wave plate fabricated under the first polarizing film, and the lower substrate includes a half-wave plate A wave plate is fabricated on the second polarizing film. 10. The pixel structure of a transflective liquid crystal display panel according to claim 1, wherein the two pixel electrodes and the two common electrodes are both made of indium tin oxide. 11. The pixel structure of a transflective liquid crystal display panel according to claim 1, wherein the two pixel electrodes and the two common electrodes are formed on the lower substrate as strip-shaped protrusions. 12. The pixel structure of a transflective liquid crystal display panel according to claim 1, characterized in that it is a transflective liquid crystal display applied to a black matrix. 13. A pixel structure of a transflective liquid crystal display panel, characterized by comprising: An upper substrate, including a first polarizing film fabricated on the upper surface of the upper substrate; The lower substrate is fabricated under the upper substrate. The lower substrate includes a quarter-wave plate and a second polarizing film fabricated on the lower surface of the lower substrate from top to bottom, and the upper surface of the lower substrate can be divided into A reflective area covered with a reflective layer and a penetrating area; its features are: A mixed nematic liquid crystal molecular layer is sandwiched between the upper and lower substrates, and exhibits a phase retardation equivalent to a quarter wavelength; A first pixel electrode and a first common electrode are fabricated on the reflective area in the form of elongated protrusions, separated by a first predetermined distance, to generate a transverse electric field to drive the liquid crystal molecules to turn; A second pixel electrode and a second common electrode are fabricated on the penetrating region in the form of elongated protrusions, separated by a second predetermined distance, to generate a transverse electric field to drive the liquid crystal molecules to turn, and the first predetermined distance is greater than the second predetermined distance; When an operating voltage is input into the pixel structure, the phase retardation effect of the liquid crystal molecular layer on the reflective area is increased from a quarter wavelength to a half wavelength, and the phase retardation effect of the liquid crystal molecular layer on the transmissive area is The phase delay effect is increased from 1/4 wavelength to 3/4 wavelength to achieve maximum display brightness. 14. The pixel structure of a transflective liquid crystal display panel according to claim 13, wherein a first alignment film is formed on the lower surface of the upper substrate, and a second alignment film is formed on the upper surface of the lower substrate. film, and the pretilt angle of the second alignment film is larger than the pretilt angle of the first alignment film, so that the nematic liquid crystal molecules between the upper and lower substrates are arranged in a hybrid state. 15. The pixel structure of a transflective liquid crystal display panel according to claim 13, wherein a first alignment film is formed on the lower surface of the upper substrate, and a second alignment film is formed on the upper surface of the lower substrate. film, and the pretilt angle of the second alignment film is smaller than the pretilt angle of the first alignment film, so that the nematic liquid crystal molecules between the upper and lower substrates are arranged in a hybrid state. 16. The pixel structure of a transflective liquid crystal display panel according to claim 13, wherein a lateral alignment film is formed on the lower surface of the upper substrate, and a vertical alignment film is formed on the upper surface of the lower substrate, thereby The nematic liquid crystal molecules between the upper and lower substrates are arranged in a mixed state. 17. The pixel structure of a transflective liquid crystal display panel according to claim 13, wherein a vertical alignment film is formed on the lower surface of the upper substrate, and a lateral alignment film is formed on the upper surface of the lower substrate, thereby The nematic liquid crystal molecules between the upper and lower substrates are arranged in a mixed state. 18. The pixel structure of a transflective liquid crystal display panel according to claim 13, characterized in that: the upper substrate includes a half-wave plate fabricated under the first polarizing film, and the lower substrate includes a half-wave plate A wave plate is fabricated on the second polarizing film. 19. The pixel structure of a transflective liquid crystal display panel according to claim 13, wherein the two pixel electrodes and the two common electrodes are both made of indium tin oxide. 20. The pixel structure of a transflective liquid crystal display panel according to claim 13, characterized in that it is a transflective liquid crystal display applied to a black matrix.

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