CN215642156U - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
- Publication number
- CN215642156U CN215642156U CN202121432922.1U CN202121432922U CN215642156U CN 215642156 U CN215642156 U CN 215642156U CN 202121432922 U CN202121432922 U CN 202121432922U CN 215642156 U CN215642156 U CN 215642156U
- Authority
- CN
- China
- Prior art keywords
- substrate
- light
- electrode
- display panel
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a display panel and a display device. The display panel includes: the display device comprises a display substrate, a first polaroid and a light guide plate; the display substrate comprises a first substrate and a second substrate which are arranged opposite to each other, and liquid crystal filled in a gap between the first substrate and the second substrate opposite to each other; electrodes are formed on the first substrate and/or the second substrate, and liquid crystal can deflect under the action of an electric field generated by the electrodes; the first polaroid is positioned on one side of the first substrate, which is far away from the second substrate; the light guide plate is positioned on one side of the second substrate, which is far away from the first substrate; the light guide plate is arranged on the first substrate, the second substrate is arranged on the second substrate, the first substrate is arranged on the light guide plate, the second substrate is arranged on the light guide plate, the brightness enhancement film is arranged on one side of the light guide plate, which is far away from the second substrate, the brightness enhancement film can reflect light in a first polarization direction and transmit light in a second polarization direction, and the first polarization direction is vertical to the second polarization direction; and the direction of the transmission axis of the first polarizer is vertical to the second polarization direction. The brightness enhancement film can replace one of the polaroids and the reflecting layer in the traditional display panel, so that the light utilization rate and the display brightness of the reflecting display panel are improved.
Description
Technical Field
The utility model belongs to the technical field of display, and particularly relates to a display panel and a display device.
Background
At present, display devices can be classified into three types, i.e., transmissive, reflective, and transflective, according to the type of light source (e.g., backlight, ambient light, etc.) used in the display device. The reflective display device realizes display by reflecting ambient light incident into the reflective display device. The reflective display device does not need to be additionally provided with a backlight module to provide backlight for the display of the reflective display device, so that the reflective display device is widely concerned and applied.
However, most of the existing liquid crystal display panels use two polarizers to perform polarization selection on light to realize image display, which causes a problem of low transmittance of the reflective liquid crystal display panel.
SUMMERY OF THE UTILITY MODEL
The utility model provides a display panel and a display device, aiming at the problem that the transmittance of a reflective liquid crystal display panel is low due to the fact that the conventional liquid crystal display panel uses two polaroids.
The present invention provides a display panel including: the display device comprises a display substrate, a first polaroid and a light guide plate;
the display substrate comprises a first substrate and a second substrate which are arranged opposite to each other, and liquid crystal filled in a gap between the first substrate and the second substrate opposite to each other;
electrodes are formed on the first substrate and/or the second substrate, and the liquid crystal can deflect under the action of an electric field generated by the electrodes;
the first polaroid is positioned on one side of the first substrate, which is far away from the second substrate;
the light guide plate is positioned on one side of the second substrate, which is far away from the first substrate;
the light guide plate is arranged on the first substrate, the second substrate is arranged on the light guide plate, the light guide plate is arranged on the first substrate, the light guide plate is arranged on the second substrate, the light guide plate is arranged on the light guide plate, the brightness enhancement film is arranged on one side of the light guide plate, which is far away from the second substrate, the brightness enhancement film can reflect light in a first polarization direction and transmit light in a second polarization direction, and the first polarization direction is vertical to the second polarization direction; and the direction of the transmission axis of the first polarizer is vertical to the second polarization direction.
Optionally, the backlight module further comprises a light absorbing layer, the light absorbing layer is located on one side of the brightness enhancement film, which is away from the light guide plate, and is used for absorbing the light of the second polarization direction transmitted by the brightness enhancement film, or is also used for absorbing any light.
Optionally, the light absorbing layer includes a second polarizer, and a transmission axis direction of the second polarizer is consistent with the second polarization direction.
Optionally, the light absorbing layer comprises a black glue layer, which can absorb any light irradiated thereon.
Optionally, the light source further comprises a light emitting surface of the light source opposite to at least one side edge end surface of the light guide plate.
Optionally, the display substrate further includes a black matrix and a plurality of color resistors of different colors, where the plurality of color resistors and the black matrix are disposed on the first substrate and located on a side of the first substrate close to the second substrate;
the color resistors are arranged in an array, and the black matrix is positioned between any adjacent color resistors.
Optionally, the color resistances comprise a red color resistance, a green color resistance, a blue color resistance and a white color resistance;
a pixel unit is formed by one red color resistor, one green color resistor, one blue color resistor and one white color resistor;
the display substrate comprises a plurality of pixel units, and the pixel units are arranged in an array.
Optionally, a first electrode is formed on the first substrate, and a second electrode is formed on the second substrate;
the first electrode is positioned on one side of the first substrate close to the second substrate, and the first electrode is closer to the first substrate relative to the color resistors and the black matrix; the second electrode is positioned on one side of the second substrate close to the first substrate;
the first electrode is a face electrode; the orthographic projection of the second electrode on the first substrate and the orthographic projection of the color resistor on the first substrate at least partially overlap.
Optionally, a first electrode and a second electrode are formed on the second substrate, the first electrode and the second electrode are located on one side of the second substrate close to the first substrate, and the first electrode and the second electrode are sequentially far away from the second substrate; an insulating layer is further arranged between the first electrode and the second electrode;
the first electrode is a face electrode; the second electrode is a slit electrode.
The utility model also provides a display device comprising the display panel.
The utility model has the beneficial effects that: the display panel provided by the utility model can replace one of the polaroids and the reflecting layer in the traditional reflection type liquid crystal display panel by arranging the brightness enhancement film, so that the display panel realizes reflection type display, the brightness enhancement film has higher reflectivity to natural light and linearly polarized light, and extremely high retention degree to the polarization degree of the linearly polarized light, namely the change to the polarization degree of the light is minimum, thereby improving the utilization rate of the reflection type display panel to the light, and further obviously improving the brightness of a display picture; meanwhile, the display panel can realize coexistence and random switching of a transmission display mode and a reflection display mode, so that the normal display brightness of the display panel is further ensured.
According to the display device provided by the utility model, the display brightness of the display device is improved by adopting the display panel, so that the display effect of the display device is improved.
Drawings
FIG. 1 is a schematic cross-sectional view illustrating a display panel according to an embodiment of the present invention;
FIG. 2 is a light path diagram of the display panel shown in FIG. 1 displaying a white image when the ambient light is sufficient;
FIG. 3 is a light path diagram of the display panel shown in FIG. 1 displaying a black image when the ambient light is sufficient;
FIG. 4 is a comparison graph of test data for the effect of a brightness enhancement film, a plane mirror, and an optical film on the reflectivity and polarization of light in an embodiment of the present invention;
FIG. 5 is a graph comparing display brightness data of the display panel of FIG. 1 with that of a conventional reflective display panel;
FIG. 6 is a diagram illustrating a comparison between the display panel of FIG. 1 and a conventional reflective display panel;
FIG. 7 is a schematic cross-sectional view illustrating another display panel according to an embodiment of the present invention;
FIG. 8 is a light path diagram of the display panel of FIG. 7 displaying a white image when the ambient light is insufficient;
FIG. 9 is a light path diagram of the display panel of FIG. 7 displaying a black image when the ambient light is insufficient;
FIG. 10 is a graph comparing display luminance data of the display panel of FIG. 7 with that of a conventional reflective display panel;
FIG. 11 is a schematic cross-sectional view illustrating a structure of another display panel according to an embodiment of the present invention;
FIG. 12 is a diagram of light paths of the display panel of FIG. 11 when the ambient light is sufficient and the display panel displays a black picture;
FIG. 13 is a diagram of light paths of the display panel of FIG. 11 when the ambient light is sufficient and the display panel displays a white picture;
FIG. 14 is a diagram of light paths of the display panel of FIG. 11 when the ambient light is insufficient and the display panel displays a black picture;
fig. 15 is a light path diagram of the display panel in fig. 11 when the ambient light is insufficient and the display panel displays a white picture.
Wherein the reference numerals are:
1. a display substrate; 11. a first substrate; 12. a second substrate; 13. a liquid crystal; 14. a black matrix; 15. color resistance; 101. red color resistance; 102. green color resistance; 103. blue color resistance; 104. white color resistance; 16. a first electrode; 17. a second electrode; 18. an insulating layer; 2. a first polarizer; 3. a light guide plate; 4. a brightness enhancement film; 5. a light absorbing layer; 6. a light source.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, a display panel and a display device of the present invention are described in further detail below with reference to the accompanying drawings and the detailed description.
In order to solve the problem that the transmittance of a reflective liquid crystal display panel is low due to the fact that two polaroids are used by the existing liquid crystal display panel, the display of light rays with different colors is achieved by reflecting light rays with different colors through a liquid crystal grating layer in the public technology.
The disclosed technology also proposes to use the light reflection magnetic conductor to realize total reflection display, and control whether the light reflection magnetic conductor is magnetized and the magnetization degree, so as to control whether the reflected light of the polarized light after the action of the light reflection magnetic conductor can penetrate the polarizer and the amount of the polarized light, further realize the control of the display of each sub-pixel, and realize the effective display of the reflective display panel. Although only one polarizer can be used in the method, the light reflection magnetic conductor also performs secondary polarization regulation on light, so that the light utilization rate of the display device is reduced, and the switching and coexistence of the transmission display mode and the reflection display mode cannot be realized.
In summary, the existing reflective display technology has low utilization rate of light, which results in dark image display when used under normal ambient light, and the risk of abnormal display when the ambient light is dark; most of the disclosed technologies cannot realize the coexistence of the reflective display mode and the transmissive display mode, which causes the problem that the reflective display module cannot be used in a dark environment, and limits the application range of the reflective display module.
In view of the above problem, an embodiment of the present invention provides a display panel, as shown in fig. 1, including: the display device comprises a display substrate 1, a first polaroid 2 and a light guide plate 3; the display substrate 1 comprises a first substrate 11 and a second substrate 12 which are arranged opposite to each other, and liquid crystal 13 filled in the gap between the first substrate 11 and the second substrate 12 opposite to each other; electrodes are formed on the first substrate 11 and the second substrate 12, and the liquid crystal 13 can deflect under the action of an electric field generated by the electrodes; the first polarizer 2 is located on one side of the first substrate 11 away from the second substrate 12; the light guide plate 3 is positioned on one side of the second substrate 12, which is far away from the first substrate 11; the light guide plate is characterized by further comprising a brightness enhancement film 4, wherein the brightness enhancement film 4 is arranged on one side, away from the second substrate 12, of the light guide plate 3, the brightness enhancement film 4 can reflect light in a first polarization direction and transmit light in a second polarization direction, and the first polarization direction is perpendicular to the second polarization direction; and the direction of the transmission axis of the first polarizer 2 is perpendicular to the second polarization direction.
The light guide plate 3 is used to make the incident light more uniform after total reflection. The brightness enhancement film 4 adopts a DBEF core brightness enhancement film, and is a film or a sheet which is applied to a backlight system of a display product and is used for improving the luminous efficiency; the DBEF core brightness enhancement film mainly comprises a core layer and a coating layer on the core layer, wherein the coating glue is obtained after diffusion particles and glue are mixed, and the DBEF core brightness enhancement film can be obtained after the coating glue is uniformly coated on the core layer and then dried.
In this embodiment, the external ambient light is incident into the display panel through the first polarizer 2 and irradiates the brightness enhancement film 4, the brightness enhancement film 4 can reflect the light irradiated thereon, and the reflected light is emergent after passing through the first polarizer 2 again, so as to realize the reflective display of the display panel. The brightness enhancement film 4 can replace one of the polarizers and the reflective layers in the conventional reflective liquid crystal display panel, so that the display panel can realize reflective display.
Optionally, in this embodiment, the display panel further includes a light absorbing layer 5, and the light absorbing layer 5 is located on a side of the brightness enhancement film 4 away from the light guide plate 3 and is used for absorbing the light with the second polarization direction transmitted by the brightness enhancement film 4. The setting of light absorption layer 5 can absorb the light of the 4 transmissive second polarization directions of brightness enhancement film to prevent that the light of second polarization direction from causing the reverberation of first polarization direction after being reflected by brightness enhancement film 4 from crosstalking, thereby promoted the definition of this display panel display picture, and then improved this display panel's display effect.
Optionally, the light absorbing layer 5 includes a second polarizer, and the transmission axis direction of the second polarizer is the same as the second polarization direction. Because to this reflective display panel, the light of first polarization direction is used for the display screen after 4 reflection of brightness enhancement film, and the light of second polarization direction need not be used for showing, so need eliminate the light of second polarization direction, to the light formation crosstalk of first polarization direction after preventing the light of second polarization direction from being reflected by brightness enhancement film 4, so can make the light of second polarization direction permeate through setting up the second polaroid that light axis direction and second polarization direction are unanimous, can eliminate the light of second polarization direction, thereby promote the definition that this display panel shows the picture.
Optionally, the light absorbing layer 5 is also used to absorb any light. Further optionally, the light absorbing layer 5 comprises a black glue layer, which may absorb any light impinging thereon. The black glue film is like black matrix, black sticky tape etc, the black glue film can absorb arbitrary light, because only the light of first polarization direction is reflected by brightness enhancement film 4 and is used for showing, and other arbitrary light except that first polarization direction all need not be used for showing, so absorb other arbitrary light except that first polarization direction through the black glue film, can prevent that other arbitrary light except that first polarization direction that need not be used for showing from causing the reverberation to first polarization direction after 4 reflections of brightness enhancement film, thereby promoted this display panel display screen's definition, and then improved this display panel's display effect.
Optionally, the display substrate 1 further includes a black matrix 14 and a plurality of color resistors 15 of different colors, the plurality of color resistors 15 and the black matrix 14 are disposed on the first substrate 11 and located on a side of the first substrate 11 close to the second substrate 12; the plurality of color resistors 15 are arranged in an array, and the black matrix 14 is located between any adjacent color resistors 15. The color resistors 15 are provided on the display substrate 1, thereby realizing color display of the display panel. The black matrix 14 in the display substrate 1 can prevent light leakage between the adjacent color resists 15 and prevent the non-display area between the adjacent color resists 15 from being seen.
Optionally, the color resistors 15 include a red color resistor 101, a green color resistor 102, a blue color resistor 103, and a white color resistor 104; a red color resistor 101, a green color resistor 102, a blue color resistor 103 and a white color resistor 104 form a pixel unit; the display substrate 1 includes a plurality of pixel units arranged in an array. The pixel unit is composed of red, green and blue resistors, and the color display of the display panel can be realized; by adding the white color resistor 104 in the pixel unit, the white color resistor 104 absorbs little light, so the white color resistor 104 can improve the utilization rate of the light of the display panel, and simultaneously improve the display brightness of the display panel, thereby improving the display effect of the display panel.
Optionally, in this embodiment, the first substrate 11 is formed with a first electrode 16, and the second substrate 12 is formed with a second electrode 17; the first electrode 16 is positioned on one side of the first substrate 11 close to the second substrate 12, and the first electrode 16 is closer to the first substrate 11 relative to the color resistors 15 and the black matrix 14; the second electrode 12 is positioned on one side of the second substrate 12 close to the first substrate 11; the first electrode 16 is a face electrode; the orthographic projection of the second electrode 17 on the first substrate 11 at least partially overlaps the orthographic projection of the color resistor 15 on the first substrate 11. That is, the display substrate 1 in the present embodiment is a TN (Twisted Nematic) type display substrate.
Further optionally, an orthographic projection of the second electrode 17 on the first substrate 11 coincides with an orthographic projection of the color resistor 15 on the first substrate 11. The first electrode 16 may be a plurality of block-shaped electrodes, and for example, an orthogonal projection of the first electrode 16 on the first substrate 11 may completely overlap an orthogonal projection of the color resistor 15 on the first substrate 11. The design of the first electrode 16 and the second electrode 17 is arbitrary, and is not limited to the above-described arrangement, as long as an electric field for rotating the liquid crystal 13 is formed between the first electrode 16 and the second electrode 17.
In this embodiment, the second electrode 17 is a pixel electrode, and the first electrode 16 is a common electrode; the liquid crystal 13 can rotate under the action of an electric field formed after the first electrode 16 and the second electrode 17 are electrified, so that whether the light reflected by the brightness enhancement film 4 passes through the first polarizer 2 or not and the amount of the light passing through the first polarizer 2 are controlled, the display of each pixel unit is controlled, and the effective display of the reflective display panel is realized.
In this embodiment, the display substrate further includes a pixel driving circuit (not shown), the pixel driving circuit is disposed on the second substrate 12 and is located on one side of the second electrode 17 close to the second substrate 12; the pixel driving circuit is electrically connected to the second electrode 17 and the first electrode 16, and is configured to provide a data driving signal to the second electrode 17 and a common voltage signal to the first electrode 16, so that rotation of the liquid crystal 13 at different angles is formed between the second electrode 17 and the first electrode 16, and display of different gray-scale pictures of the display panel is achieved. The specific circuit of the pixel driving circuit is a conventional circuit design, and the pixel driving circuit is not further improved in this embodiment, so the specific circuit of the pixel driving circuit is not described herein again.
In this embodiment, the display substrate further includes a first alignment film and a second alignment film (not shown). The first alignment film is disposed on a surface layer of the first substrate 11 facing the second substrate 12; the second alignment film is disposed on the surface layer of the second substrate 12 facing the first substrate 11; the alignment direction of the first alignment film is parallel to the alignment direction of the second alignment film; the first alignment film and the second alignment film are used for initial alignment before non-energization of the liquid crystal 13.
Based on the above-described structure of the display panel in the present embodiment, the TN (Twisted Nematic) display substrate 1 is in a normally white display mode. Assuming that the transmission axis of the first polarizer 2 is 0 °, the first polarization direction is 90 °, and the second polarization direction is also 90 °. As shown in fig. 2, the light path when the display panel displays a white picture in this embodiment when the ambient light is sufficient; the natural light is changed into linearly polarized light with the polarization direction of 0 degree after passing through the first polarizer 2 with the transmission axis of 0 degree, and the liquid crystal 13 is in an on state at the moment; linearly polarized light can normally transmit without being changed in polarization direction; after the 0-degree linearly polarized light is reflected by the brightness enhancement film 4, the polarization state is still unchanged, and the white picture display is realized on the display panel after the light passes through the color resistor 15.
As shown in fig. 3, the light path when the display panel displays a black screen in this embodiment when the ambient light is sufficient; the natural light is changed into linearly polarized light with the polarization direction of 0 degree after passing through the first polarizer 2 with the light transmission axis of 0 degree, and the liquid crystal 13 is in an off state at the moment; due to the optical rotation of the liquid crystal, the 0-degree linearly polarized light is rotated to 90-degree linearly polarized light after passing through the liquid crystal 13, and the 90-degree linearly polarized light is transmitted from the brightness enhancement film 4 and absorbed by the light absorption layer 5, so that the display panel displays a black picture.
According to the light path principle in fig. 2 and 3, the display panel can use ambient light as a display light source to realize reflective display.
As shown in fig. 4, the test data shows that, compared with the planar reflector with a metal plated layer on the surface for reflection and the optical film layer in the backlight module for display products (i.e. DBEF, which is an optical film layer integrated with the optical processing functions of reflection, refraction, scattering, convergence and the like processed on the basis of the DBEF core brightness enhancement film), the brightness enhancement film 4 in the embodiment has higher reflectivity for natural light and linear polarized light, and has extremely high retention for the polarization degree of the linear polarized light, i.e. the change of the polarization degree of the linear polarized light is minimum, thereby improving the utilization rate of the reflective display panel for light. As shown in fig. 5 and fig. 6, for the data comparison of the display brightness and the actual comparison of the display effect between the display panel in the present embodiment and the conventional reflective display panel, it can be seen from the figures that the light utilization rate of the display panel in the present embodiment can be greatly improved in the reflective mode display, and compared with the conventional reflective display panel, the light utilization rate of the display panel in the present embodiment is improved by more than 40%, so that the brightness of the display screen is obviously improved.
Optionally, in this embodiment, the display panel further includes a photosensitive control structure (not shown in the figure), where the photosensitive control structure is configured to sense the intensity of the ambient light, and control the intensity of an electric field formed by the first electrode 16 and the second electrode 17 after power-up according to the intensity of the ambient light, so as to control the rotation angle of the liquid crystal 13, and further control the display brightness of the display panel, so that the display brightness of the display panel can be adjusted according to the intensity of the ambient light, thereby ensuring maximum utilization of the ambient light and uniformity of brightness perceived by human eyes on the display panel, and avoiding stimulation of sudden changes in the brightness of the display panel to the visual system of an observer.
Alternatively, the light sensing control structure may be a photosensor, that is, the photosensor senses the intensity of the ambient light and generates different electrical control signals, and the electrical control signals control the pixel driving circuit to provide different driving signals to the first electrode 16 and the second electrode 17, so as to control the liquid crystal 13 to rotate by different angles, thereby adjusting the display brightness of the display panel. The specific control circuit is a relatively mature technology and is not described herein again.
The display panel in this embodiment can use on highway and the other warning sign of rural highway to outdoor display signboard on the highway is the example, under the sufficient condition of light daytime, can normally show the sign, when night or light are not enough, the driver can open the far-reaching headlamp, and the illumination intensity of far-reaching headlamp is high, can regard as outdoor display panel's light source. The display panel in this embodiment can also be applied to an electronic reading device.
The embodiment of the present invention further provides a display panel, which is different from the above embodiment, as shown in fig. 7, on the basis of the above embodiment, the display panel further includes a light source 6, and a light emitting surface of the light source 6 is opposite to at least one side edge end surface of the light guide plate 3. Namely, the display panel is provided with a side-in backlight.
Alternatively, the light source 6 may be an LED light bar.
Other structures of the display panel in this embodiment are the same as those in the above embodiments, and are not described herein again.
Based on the structure of the display panel in this embodiment, as shown in fig. 8, the light path of the display panel in this embodiment is when the ambient light is insufficient (e.g. in a limit state, no light source exists in the outside world); when the external light is insufficient, the light source 6 is turned on to provide display light for the display panel, and light emitted by the light source 6 is incident on the brightness enhancement film 4 after passing through the light guide plate 3; the light polarized in the 90 degree direction is absorbed by the light absorption layer 5 after passing through the brightness enhancement film 4, and the light polarized in the 0 degree direction is reflected to the display substrate 1, at this time, the liquid crystal 13 is in an on state, the 0 degree linearly polarized light can normally pass through without changing the polarization direction, and the light passes through the color resistor 15 to realize white picture display on the display panel.
As shown in fig. 9, the light path of the display panel in this embodiment is when the ambient light is insufficient (e.g. in a limit state, no light source exists in the outside world); when the external light is insufficient, the light source 6 is turned on to provide display light for the display panel, and light emitted by the light source 6 is incident on the brightness enhancement film 4 after passing through the light guide plate 3; the light polarized in the 90-degree direction is absorbed by the light absorbing layer 5 after passing through the brightness enhancement film 4, the light polarized in the 0-degree direction is reflected to the display substrate 1, the liquid crystal 13 is in an off state, the 0-degree linearly polarized light is rotated into 90-degree linearly polarized light after passing through the liquid crystal 13, the 90-degree linearly polarized light is absorbed by the light absorbing layer 5 after passing through the brightness enhancement film 4, and a black picture is displayed on the display panel.
As shown in fig. 10, which is a comparison of the display brightness data of the display panel in this embodiment with that of the conventional reflective display panel, the light source 6 can reinforce the ambient light when the ambient light is weak, and it can be seen from the figure that after the ambient light is reinforced by the light emitted from the light source 6, the image display brightness of the display panel is obviously improved compared with that when the light source 6 is not reinforced in the above embodiment.
In this embodiment, the photosensitive control structure is further electrically connected to the light source 6, and is configured to sense the intensity of the ambient light, and control the turning on, turning off, and power switching of the light source 6 according to the intensity of the ambient light. Therefore, under the condition of insufficient external ambient light, the light source 6 can be started and the power of the light source 6 can be adjusted, so that the light source 6 can assist and match the external ambient light to provide display light for the display panel, and the normal display brightness of the display panel is realized; the maximum utilization of the ambient light and the uniformity of the perceived brightness of the display panel by human eyes are ensured, and the stimulation of the sudden change of the brightness of the display panel to the visual system of an observer is avoided.
In this embodiment, when the display panel displays under the condition of insufficient ambient light, the light source 6 is turned on, and the transmissive display of the display panel can be realized under the condition that only the light source 6 provides display light for the display panel; under the condition that only external environment light provides display light for the display panel, the reflective display of the display panel can be realized; under the condition that the external environment light and the light source 6 provide display light for the display panel at the same time, the coexistence and random switching of the transmission type display and the reflection type display of the display panel can be realized, thereby further ensuring the normal display brightness of the display panel.
The embodiment of the present invention further provides a display panel, which is different from the foregoing embodiment, as shown in fig. 11, a first electrode 16 and a second electrode 17 are formed on a second substrate 12, the first electrode 16 and the second electrode 17 are located on a side of the second substrate 12 close to the first substrate 11, and the first electrode 16 and the second electrode 17 are sequentially disposed away from the second substrate 12; an insulating layer 18 is further arranged between the first electrode 16 and the second electrode 17; the first electrode 16 is a face electrode; the second electrode 17 is a slit electrode. That is, the display substrate 1 in the present embodiment is an ADS (Advanced Super Dimension Switch) type display substrate.
Other structures of the display panel in this embodiment are the same as those in the above embodiments, and are not described herein again.
Based on the structure of the display panel in this embodiment, the ADS (Advanced Super Dimension Switch) display substrate 1 is in a normally black display mode. Also assuming that the transmission axis of the first polarizer 2 is 0 °, the first polarization direction is 90 °, and the second polarization direction is also 90 °. As shown in fig. 12, the light path when the display panel displays a white picture in this embodiment when the ambient light is sufficient; the natural light is changed into linearly polarized light with the polarization direction of 0 degree after passing through the first polarizer 2 with the transmission axis of 0 degree, and the liquid crystal 13 is in an off state at the moment; linearly polarized light can normally transmit without being changed in polarization direction; after the 0-degree linearly polarized light is reflected by the brightness enhancement film 4, the polarization state is still unchanged, and the white picture display is realized on the display panel after the light passes through the color resistor 15.
As shown in fig. 13, the light path when the display panel displays a black screen in this embodiment when the ambient light is sufficient; the natural light is changed into linearly polarized light with the polarization direction of 0 degree after passing through the first polarizer 2 with the light transmission axis of 0 degree, and the liquid crystal 13 is in an open state at the moment; due to the optical rotation of the liquid crystal, the 0-degree linearly polarized light is rotated to 90-degree linearly polarized light after passing through the liquid crystal 13, and the 90-degree linearly polarized light is transmitted from the brightness enhancement film 4 and absorbed by the light absorption layer 5, so that the display panel displays a black picture.
As shown in fig. 14, the light path of the display panel in this embodiment is when the ambient light is insufficient (e.g. in a limit state, no light source exists in the outside world); when the external light is insufficient, the light source 6 is turned on to provide display light for the display panel, and light emitted by the light source 6 is incident on the brightness enhancement film 4 after passing through the light guide plate 3; the light polarized in the 90 degree direction is absorbed by the light absorption layer 5 after passing through the brightness enhancement film 4, while the light polarized in the 0 degree direction is reflected to the display substrate 1, at this time, the liquid crystal 13 is in an off state, the 0 degree linearly polarized light can normally pass through without changing the polarization direction, and the light passes through the color resistor 15 to realize white picture display on the display panel.
As shown in fig. 15, the light path of the display panel in this embodiment is when the ambient light is insufficient (e.g. in a limit state, no light source exists in the outside world); when the external light is insufficient, the light source 6 is turned on to provide display light for the display panel, and light emitted by the light source 6 is incident on the brightness enhancement film 4 after passing through the light guide plate 3; the light polarized in the 90-degree direction is absorbed by the light absorbing layer 5 after passing through the brightness enhancement film 4, the light polarized in the 0-degree direction is reflected to the display substrate 1, the liquid crystal 13 is in an on state at the moment, the 0-degree linearly polarized light is rotated into 90-degree linearly polarized light after passing through the liquid crystal 13, the 90-degree linearly polarized light is absorbed by the light absorbing layer 5 after passing through the brightness enhancement film 4, and a black picture is displayed on the display panel.
The display panel provided by the embodiment of the utility model can replace one polarizer and one reflecting layer in the traditional reflective liquid crystal display panel by arranging the brightness enhancement film, so that the display panel realizes reflective display, the brightness enhancement film has higher reflectivity to natural light and linearly polarized light, and extremely high retention degree to the polarization degree of the linearly polarized light, namely the change to the polarization degree of the light is minimum, thereby improving the utilization rate of the reflective display panel to the light, and further obviously improving the brightness of a display picture; meanwhile, the display panel can realize coexistence and random switching of a transmission display mode and a reflection display mode, so that the normal display brightness of the display panel is further ensured.
An embodiment of the present invention further provides a display device, including the display panel in any of the above embodiments.
By adopting the display panel in any embodiment, the display brightness of the display device is improved, and the display effect of the display device is improved.
The display module provided by the utility model can be any product or component with a display function, such as a liquid crystal panel, a liquid crystal television, a display, a mobile phone, a navigator and the like.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the utility model, and these modifications and improvements are also considered to be within the scope of the utility model.
Claims (10)
1. A display panel, comprising: the display device comprises a display substrate, a first polaroid and a light guide plate;
the display substrate comprises a first substrate and a second substrate which are arranged opposite to each other, and liquid crystal filled in a gap between the first substrate and the second substrate opposite to each other;
electrodes are formed on the first substrate and/or the second substrate, and the liquid crystal can deflect under the action of an electric field generated by the electrodes;
the first polaroid is positioned on one side of the first substrate, which is far away from the second substrate;
the light guide plate is positioned on one side of the second substrate, which is far away from the first substrate;
the backlight module is characterized by further comprising a brightness enhancement film, wherein the brightness enhancement film is arranged on one side of the light guide plate, which is far away from the second substrate, and can reflect light in a first polarization direction and transmit light in a second polarization direction, and the first polarization direction is vertical to the second polarization direction; and the direction of the transmission axis of the first polarizer is vertical to the second polarization direction.
2. The display panel of claim 1, further comprising a light absorbing layer on a side of the brightness enhancement film facing away from the light guide plate for absorbing light of the second polarization direction transmitted by the brightness enhancement film or for absorbing any light.
3. The display panel according to claim 2, wherein the light absorbing layer comprises a second polarizer, and a transmission axis direction of the second polarizer coincides with the second polarization direction.
4. The display panel of claim 2 wherein the light absorbing layer comprises a black glue layer that absorbs any light incident thereon.
5. The display panel of claim 1, further comprising a light source, wherein a light emitting surface of the light source is opposite to at least one side edge end surface of the light guide plate.
6. The display panel according to claim 1, wherein the display substrate further comprises a black matrix and a plurality of color resistors of different colors, the plurality of color resistors and the black matrix are disposed on the first substrate and located on a side of the first substrate close to the second substrate;
the color resistors are arranged in an array, and the black matrix is positioned between any adjacent color resistors.
7. The display panel of claim 6, wherein the color resistances comprise a red color resistance, a green color resistance, a blue color resistance, and a white color resistance;
a pixel unit is formed by one red color resistor, one green color resistor, one blue color resistor and one white color resistor;
the display substrate comprises a plurality of pixel units, and the pixel units are arranged in an array.
8. The display panel according to claim 7, wherein a first electrode is formed over the first substrate, and a second electrode is formed over the second substrate;
the first electrode is positioned on one side of the first substrate close to the second substrate, and the first electrode is closer to the first substrate relative to the color resistors and the black matrix; the second electrode is positioned on one side of the second substrate close to the first substrate;
the first electrode is a face electrode; the orthographic projection of the second electrode on the first substrate and the orthographic projection of the color resistor on the first substrate at least partially overlap.
9. The display panel according to claim 7, wherein a first electrode and a second electrode are formed over the second substrate, the first electrode and the second electrode are located on a side of the second substrate close to the first substrate, and the first electrode and the second electrode are sequentially located away from the second substrate; an insulating layer is further arranged between the first electrode and the second electrode;
the first electrode is a face electrode; the second electrode is a slit electrode.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121432922.1U CN215642156U (en) | 2021-06-25 | 2021-06-25 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121432922.1U CN215642156U (en) | 2021-06-25 | 2021-06-25 | Display panel and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215642156U true CN215642156U (en) | 2022-01-25 |
Family
ID=79945775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121432922.1U Active CN215642156U (en) | 2021-06-25 | 2021-06-25 | Display panel and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215642156U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023216567A1 (en) * | 2022-05-12 | 2023-11-16 | 重庆惠科金渝光电科技有限公司 | Backlight module and display apparatus |
-
2021
- 2021-06-25 CN CN202121432922.1U patent/CN215642156U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023216567A1 (en) * | 2022-05-12 | 2023-11-16 | 重庆惠科金渝光电科技有限公司 | Backlight module and display apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW594245B (en) | Illumination device, liquid crystal device, and electronic apparatus | |
| TW536688B (en) | Liquid crystal display element | |
| US10067343B2 (en) | Liquid crystal display device for head-up display device, and head-up display device | |
| TW546619B (en) | Liquid crystal device and electronic apparatus using the same | |
| TW552567B (en) | Device capable of being switched between image display state and mirror state and apparatus equipped with the same | |
| US8384861B2 (en) | Diffractive liquid crystal display | |
| CN109073921B (en) | Switch type mirror panel and switch type mirror device | |
| TW200527069A (en) | Liquid crystal display device | |
| KR101432567B1 (en) | Liquid crystal display device | |
| CN112068340A (en) | Display panel with switchable viewing angles, display device and driving method | |
| TWI230825B (en) | Liquid crystal display device | |
| CN101165576A (en) | Liquid crystal display | |
| CN215642156U (en) | Display panel and display device | |
| US20130215347A1 (en) | Display system, mobile terminal, and electronic equipment | |
| TW546513B (en) | Display element | |
| US20090273748A1 (en) | Liquid crystal display device | |
| JP2005128571A (en) | Color liquid crystal device and electronic apparatus using same | |
| CN108415202B (en) | Display panel and display device | |
| CN114815376B (en) | Reflective color display panel, display device and manufacturing method | |
| JP2017181930A (en) | Liquid crystal display device and liquid crystal display system | |
| CN113267927A (en) | Display panel and display device | |
| CN115016156A (en) | Display device with switchable wide and narrow viewing angles and driving method | |
| JP3800865B2 (en) | Liquid crystal device and electronic device | |
| CN114200722A (en) | Display panel and display device | |
| US20190011774A1 (en) | Display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |