CN213878096U - Display device - Google Patents
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- CN213878096U CN213878096U CN202021564163.XU CN202021564163U CN213878096U CN 213878096 U CN213878096 U CN 213878096U CN 202021564163 U CN202021564163 U CN 202021564163U CN 213878096 U CN213878096 U CN 213878096U
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Abstract
The utility model discloses a display device, the utility model discloses a set up the rete of inflection again in one side that the polaroid deviates from electroluminescent display panel, because the rete of inflection again can be the circular polarization with linear polarization conversion, consequently get into the rete of inflection again earlier before the linear polarization of the different polarization behind glass gets into the polaroid, the rete of inflection again converts linear polarization into circular polarization, when the contained angle between the tensile direction of film-forming and the first direction of rete of inflection again is the acute angle, almost all circular polarization all can pass the polaroid, then original Mura phenomenon disappears.
Description
Technical Field
The utility model relates to a show technical field, in particular to display device.
Background
Currently, the full-screen is the main direction of development of Organic Light-Emitting Diode (OLED) display technology. The scheme capable of realizing real full-screen display is that the display can be carried out in a camera shooting area, namely, a screen-down camera shooting scheme.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a display device for solve under the screen the problem that the Mura phenomenon appears when OLED shoots under special scene.
Accordingly, an embodiment of the present invention provides a display device, including an electroluminescent display panel having a display area with a light-transmitting area; the electroluminescent display panel comprises a grid line extending along a first direction and a data line extending along a second direction;
the display device further comprises a camera positioned on the backlight side of the electroluminescent display panel, and the camera is positioned in the light-transmitting area;
the display device further includes: the light source comprises a polaroid positioned on the light emitting side of the electroluminescent display panel and a complex refraction film layer positioned on one side of the polaroid, which deviates from the electroluminescent display panel; wherein the content of the first and second substances,
the compound refraction film layer is configured to convert linearly polarized light into circularly polarized light, and an included angle between a film forming stretching direction of the compound refraction film layer and the first direction is an acute angle.
Optionally, in the display device provided by the embodiment of the present invention, the acute angle is 20 ° to 60 °.
Optionally, in the display device provided in the embodiment of the present invention, an included angle between an extending direction of a transmission axis of the polarizer and the first direction is 0 ° to 180 °.
Optionally, in the display device provided in an embodiment of the present invention, an included angle between a film-forming stretching direction of the birefringent film layer and an extending direction of a transmission axis of the polarizer is 0 ° to 160 °.
Optionally, in the display device provided in the embodiment of the present invention, the acute angle is 45 °.
Optionally, in the display device provided in the embodiment of the present invention, a range of the phase difference value of the complex refraction film layer is 1000-.
Optionally, in the display device provided in the embodiment of the present invention, a phase difference value of the complex refraction film layer is 5000 nm.
Optionally, in the display device provided by the embodiment of the present invention, the material of the complex refractive film layer is polyethylene terephthalate or super complex refractive polyester film.
Optionally, in the above display device provided by the embodiment of the present invention, when the material of the birefringence film layer is polyethylene terephthalate, the thickness of the birefringence film layer is 30 μm to 200 μm.
Optionally, in the display device provided in the embodiment of the present invention, a thickness of the complex refraction film layer is 50 μm.
Optionally, in the display device provided in the embodiment of the present invention, the total surface of the compound refraction film layer is disposed.
Optionally, in the above display device provided in an embodiment of the present invention, the compound refractive film layer and the polarizer are bonded by a pressure sensitive adhesive or an optical adhesive.
Optionally, in the display device provided in an embodiment of the present invention, the display device further includes a cover plate located on one side of the compound refraction film layer departing from the electroluminescent display panel.
Optionally, in the above display device provided in an embodiment of the present invention, the compound refraction film layer is reused as the cover plate of the display device.
Optionally, in the display device provided in the embodiment of the present invention, a hardness value of the complex refractive film layer is greater than or equal to 6H.
The embodiment of the utility model provides a beneficial effect as follows:
the embodiment of the utility model provides a display device, when the user is indoor to separate glass (like the window) and shoot outdoor scene, because there is the dust on outdoor glass surface, and form the dust vestige one on glass, because the refracting index of glass and dust is different, outdoor natural light passes glass and gets into indoor refraction and become the linear polarization light that can take place; the utility model discloses a set up the rete of inflection again in one side that the polaroid deviates from electroluminescent display panel, and contained angle between the first direction that the grid line extends in the tensile direction of filming of the rete of inflection again and electroluminescent display panel is set up to the acute angle, get into the rete of inflection again earlier before the linearly polarized light of above-mentioned different polarization states gets into the polaroid, the rete of inflection again converts linearly polarized light into circular polarized light, almost all circular polarized light all can pass the polaroid, then original Mura phenomenon disappears.
Drawings
Fig. 1 is a schematic diagram of pixel distribution of an under-screen camera display area and a normal display area of an under-screen camera display device;
fig. 2 is a schematic cross-sectional view of a display device according to an embodiment of the present invention;
fig. 3 is a second schematic cross-sectional view illustrating a display device according to an embodiment of the present invention;
fig. 4 is a third schematic cross-sectional view illustrating a display device according to an embodiment of the present invention;
fig. 5 is a fourth schematic cross-sectional view of a display device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of light transmittance of a complex refractive film layer with different phase difference values;
FIG. 7 is a schematic view showing refractive indices of the retardation film in various directions;
FIG. 8 is a schematic view showing the relationship between the film-forming stretching direction of the birefringent film layer, the extending direction of the transmission axis of the polarizer, and the angle in the horizontal direction;
fig. 9 is a schematic view of a light propagation path according to an embodiment of the present invention;
fig. 10 is a fifth schematic cross-sectional view of a display device according to an embodiment of the present invention;
fig. 11 is a sixth schematic sectional view of a display device according to an embodiment of the present invention;
fig. 12 is a seventh schematic cross-sectional view of a display device according to an embodiment of the present invention;
fig. 13 is an eighth schematic cross-sectional view illustrating a display device according to an embodiment of the present invention;
fig. 14 is a schematic top view of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, specific embodiments of a display device according to an embodiment of the present invention are described in detail below with reference to the accompanying drawings.
The thickness and shape of each layer of film in the drawings do not reflect the true scale of the display device, and are only intended to illustrate the present invention.
At present, most of full-screen display equipment adopts a punching screen, namely, a display screen is punched in a shooting area, and a shooting device is arranged at the position of punching, so that the shooting function can only be finished in the shooting area, but the display function cannot be realized; the real full-screen display device requires the camera area to display the picture.
In the present application, a full-screen display device based on an OLED display screen is taken as an example, as shown in fig. 1, an OLED display panel in the present application has an under-screen image capture display area 10 and a normal display area 20 surrounding the under-screen image capture display area 10, in fig. 1, P represents anodes respectively corresponding to R, G, B sub-pixels, each anode corresponds to one driving circuit, fig. 1 only schematically illustrates that the number of the driving circuits of the under-screen image capture display area 10 is less than that of the driving circuits of the normal display area 20, so as to realize light transmission of the under-screen image capture display area 10. In addition, in order to reduce or eliminate the influence of ambient light on the visibility of the display panel and increase the contrast ratio, a polarizer needs to be added to the display panel structure to counteract the ambient light.
The utility model discloses the people discovery in above-mentioned full screen display device's use, when utilizing the screen that figure 1 shows to make a video recording display device and see through transparent structure such as glass window and shoot, can appear bright dark uneven stripe mura in the shooting picture.
Just discover through this application utility model people's repeated research:
in the display panel of the under-screen camera scheme shown in fig. 1, the polarizer is arranged in a whole surface, that is, the under-screen camera display area 10 also has a polarizer, in rainy days, rainwater can wash outdoor glass windows (such as windows of houses), because dust exists on the surface of the outdoor glass windows, when rainwater strikes the glass, a trace washed by the rainwater is formed on the glass, that is, dust does not exist in some positions of the glass windows, and dust exists in some positions, so that in an environment with sunlight, when a user takes the under-screen camera display device to shoot outdoor scenes indoors through the glass windows, outdoor natural light penetrates through the glass windows and is refracted indoors to form linearly polarized light; after the glass window is washed by rainwater, some positions are clean glass, some positions still have dust, because the refracting index of glass and dust is different, consequently the polarization state that takes place to refract and get into indoor linear polarization light through the different positions of glass is different, when using the display equipment that makes a video recording under the screen to shoot, the linear polarization light that the polarization state is different gets into the polaroid after, and the linear polarization light of subregion can be absorbed by the polaroid, causes the difference (Mura phenomenon) of the light and shade degree to appear after the formation of image. Specifically, the window glass may be a window glass or other transparent structure that is prone to have foreign matter left, for example, a user may wipe the windshield of the vehicle with a wiper, and then a mark may be left on the window glass after the window glass is wiped with the wiper, and the Mura phenomenon may also occur when a scene outside the vehicle is photographed in the vehicle. Of course, the glass window is not limited to the glass window or the window of a house, and may be a transparent window used in other places capable of accommodating people.
In view of this, the embodiment of the present invention provides a display device, as shown in fig. 2 to 5, including an electroluminescent display panel 100, where the electroluminescent display panel 100 has a display area, and the display area has a light-transmitting area BB, only the light-transmitting area BB is shown in fig. 2 to 5, and the light-transmitting area BB corresponds to the under-screen camera display area 10 in the display panel shown in fig. 1; the electroluminescent display panel includes a gate line extending in a first direction and a data line extending in a second direction. In general, the first direction and the second direction may be perpendicular to each other; it should be noted that, the extending direction of the gate line is generally the horizontal direction in the plane of the display panel, and the extending direction of the data line is generally the vertical direction in the plane of the display panel, in the embodiment of the present invention, the first direction is the horizontal direction, and the second direction is the vertical direction;
the display device further comprises a camera 200 positioned at the backlight side of the electroluminescent display panel 100, the camera 200 being positioned in the light-transmitting area BB; note that the backlight side of the electroluminescent display panel 100 refers to the side opposite to the light exit side of the electroluminescent display panel 100;
the display device in the embodiment of the present application further includes: a polarizer 300 located on the light-emitting side of the electroluminescent display panel 100, and a complex refractive film 400 located on the side of the polarizer 300 departing from the electroluminescent display panel 100; wherein the content of the first and second substances,
the complex refraction film layer 400 is configured to convert linearly polarized light into circularly polarized light, and an included angle between a film forming stretching direction of the complex refraction film layer 400 and the first direction (horizontal direction) is an acute angle.
Following rainy day after there is the environment of sunshine for example, the user is using the utility model provides an above-mentioned display device is when outdoor scene is shot at indoor separating glass (like the window), because there is the dust on outdoor glass surface, when the glass was beaten to the rainwater, form one rain trace on glass, because the refracting index of glass and dust is different, outdoor natural light passes glass and gets into indoor refraction one-tenth linearly polarized light that can take place, because glass is washed away by the rainwater, some positions are clean glass, some positions still have the dust, consequently, through the different positions of glass the polarization state that takes place the indoor linearly polarized light of refraction entering is different, if the direct linearly polarized light of this moment gets into the polaroid, then the linear polarized light of partial region can be absorbed by the polaroid, cause the difference of light and shade degree (the Mura phenomenon) to appear after the formation of image; the utility model discloses a one side that deviates from electroluminescent display panel 100 at polaroid 300 sets up birefringence membrane layer 400, because birefringence membrane layer 400 can be circular polarized light with linear polarized light conversion, consequently get into birefringence membrane layer 400 before the linear polarized light of above-mentioned different polarization state gets into polaroid 300 earlier, birefringence membrane layer 400 is circular polarized light with linear polarized light conversion, when the contained angle between the tensile direction of filming and the first direction of birefringence membrane layer 400 is the acute angle, almost all circular polarized light all can pass polaroid 300, then original Mura phenomenon disappears.
It should be noted that, since the extending direction of the dust formed by the rain water flowing over the glass window is close to the vertical direction, when the display device is in the vertical use state, the extending direction of the dust can be regarded as being close to the second direction, and the extending direction of the dust is perpendicular to the first direction.
It should be noted that, because the embodiment of the utility model provides a display device makes a video recording under for the screen display device, light transmission zone BB belongs to the part of display area, and light transmission zone BB also can show promptly, and the difference of light transmission zone BB and the display area except that light transmission zone BB lies in pixel circuit's quantity reduction to realize the printing opacity, can refer to the schematic diagram of fig. 1, make a video recording display area 10 is promptly under the screen in fig. 1 the embodiment of the utility model provides an in the embodiment of light transmission zone BB, make a video recording display area 10 and normal display area 20 wholly be equivalent to the display area in the embodiment of the utility model.
In practical implementation, in the display device provided in the embodiments of the present invention, as shown in fig. 2 to 5, the electroluminescent display panel 100 includes:
a substrate 1, the substrate 1 may be a flexible substrate (e.g., PI);
the driving circuit 2 is arranged on one side, facing the polarizer 300, of the substrate 1, and the driving circuit 2 comprises an active layer, a gate metal layer, a source drain metal layer and an insulating layer, wherein the active layer, the gate metal layer, the source drain metal layer and the insulating layer are arranged in a stacked mode;
an anode 3 disposed on a side of the driving circuit 2 facing the polarizer 300, wherein the anode 3 is electrically connected to a drain of a driving TFT (thin film transistor) in the driving circuit 2 through a via hole penetrating through the insulating layer, and each R, G, B sub-pixel corresponds to one anode (only schematically illustrated in the figure);
a light-emitting layer (represented by R, G, B) disposed on a side of the anode 3 facing the polarizer 300;
a cathode (not shown) disposed at a side of the light emitting layer facing the polarizer 300; and the number of the first and second groups,
and an encapsulation layer 4 disposed on a side of the cathode facing the polarizer 300.
Of course, the electroluminescent display panel 100 may also have other functional film layers known to those skilled in the art. Specifically, the structure of the electroluminescent display panel 100 is the same as that of the related art, and will not be described in detail.
It should be noted that, as shown in fig. 2 to fig. 5, R, G, B subpixels in the transparent area BB are arranged in the same manner as R, G, B subpixels in the display area except for the transparent area BB, so that the manufacturing process can be saved, and the difference lies in that the number of driving circuits in the transparent area BB is reduced, since each subpixel individually drives to emit light, the anodes corresponding to the subpixels are electrically connected to the drains of the driving circuits in one-to-one correspondence, and only a part of the subpixels in fig. 2 to fig. 5 are electrically connected to the anode 3, so as to realize that no driving circuit is provided in the area below the subpixel where no anode 3 is provided, and light transmission is realized, thereby realizing the off-screen image pickup.
Note that, as shown in fig. 2 to 5, the R, G, B subpixels are electrically connected to different anodes, respectively, and the regions where the driving circuit and the anodes are not provided exist in the light-transmitting regions BB are only schematically illustrated in fig. 2 to 5.
It should be noted that, in the display device provided in the embodiments of the present invention, the pixel density of the light-transmitting area is the same as the pixel density of the display area except the light-transmitting area, but the number of the pixel circuits is different to realize the light-transmitting of the light-transmitting area; of course, in practical implementation, the pixel density of the light-transmitting area may be smaller than the pixel density of the display area except the light-transmitting area; or the number of pixels of the light-transmitting area is the same as the number of pixels of the display area other than the light-transmitting area, but the size of the pixels of the light-transmitting area is reduced; these schemes all can realize the printing opacity of printing opacity district, all belong to the utility model discloses the scope of protection.
It should be noted that, the embodiment of the utility model provides a light transmission zone can show, certainly when specifically implementing, the light transmission zone also can only be passed through the printing opacity and do not show, and the light transmission zone forms the transparent hole promptly, and this transparent hole position does not set up drive circuit promptly, but this transparent hole position sets up other structures such as positive pole, luminescent layer, negative pole, encapsulated layer, polaroid the utility model provides a when light transmission zone among the display device adopts the transparent hole scheme, because transparent hole department also is provided with the polaroid, consequently also can have the Mura phenomenon that appears when indoor shooting outdoor scene after the rainy day, then adopts the utility model provides a set up the phenomenon that the phenomenon of Mura was realized eliminating to the scheme of compound refraction rete.
Specifically, the material of the complex refractive film layer refers to a material having different refractive indexes in each direction, and may be formed by oriented stretching of a polymer material, and commonly includes a Polyethylene terephthalate (PET) film material, a super-complex refractive polyester (SRF) film material, and the like. The compound refraction body film layer has a larger phase difference value, and when linearly polarized light passes through the compound refraction body film layer with the larger phase difference value, the linearly polarized light can be converted into circularly polarized light. Whether the full-band light of the external visible light can pass through the complex refraction film layer is related to the phase difference value (Re) of the complex refraction film layer, as shown in fig. 6, fig. 6 shows the transmittance of the full-band light (wavelength λ) of the visible light corresponding to the complex refraction film layer with different phase difference values (Re), and the formula is as follows: I/I0 is 1/2 · sin2 (pi · Re/λ), I0 is the intensity of light before it passes through the birefringent film layer, I is the intensity of light after it passes through the birefringent film layer; note that the curve 1 represents the transmittance when the phase difference Re is 800, and the curve 2 represents the transmittance when the phase difference Re is 5000, and it can be seen that the larger the phase difference (Re), the more light is transmitted in the visible light band (that is, the light intensity is also large), and therefore the birefringence film layer having a large phase difference is preferable.
In a specific implementation manner, in the display device provided in the embodiment of the present invention, the retardation value of the complex refractive film layer can be greater than or equal to 1000nm and less than or equal to 20000 nm. When the phase difference value of the complex refractive film layer is a value of 1000nm or more and 20000nm or less, the visible light band transmits more light.
Specifically, the birefringence film is a kind of retardation film, and after the alignment process (stretching) of the transparent polymer film, the molecular arrangement direction of the transparent polymer film is concentrated toward the alignment direction, so that the refractive index of light in each direction of the film is changed, and such a film is called a retardation film. As shown in fig. 7, generally define: the direction of the maximum refractive index in the plane of the diaphragm is the slow phase axis direction, and the refractive index in the direction is nx; the direction of the slow phase axis in the membrane surface is orthogonal to the direction of the incoming axis, and the refractive index in the direction is ny; the refractive index of the film in the vertical direction is nz. The phase difference Re of the membrane is (nx-ny) · d, and it can be seen that the phase difference Re of the complex refractive film layer is related to the thickness d of the complex refractive film layer, and the larger the thickness d, the larger the phase difference Re.
In a specific implementation, the larger the thickness of the birefringence layer, the larger the phase difference value, the more light is transmitted in the visible light band, i.e. the higher the intensity of the linearly polarized light converted into circularly polarized light. However, since the current display device tends to be light and thin, when the thickness of the compound refraction film layer is large, the display device is not light and thin, so as to satisfy more light passing through the visible light band as much as possible and satisfy the requirement of the display device for light and thin, in the embodiment of the present invention, the phase difference value of the compound refraction film layer is a preset value, wherein the preset value is 5000 nm. When the phase difference value of the complex refraction film layer is 5000nm, more light can penetrate through the visible light wave band, and the display device can be thinned.
In an embodiment of the present invention, in the display device, the material of the compound refraction film layer may be the PET or the SRF. Specifically, as shown in fig. 2 and 3, the material of the birefringence film layer is PET; as shown in fig. 4 and 5, the material of the multiple-refraction film layer is SRF.
In practical implementation, in the display device provided in the embodiment of the present invention, when the material of the birefringence layer is PET, in order to ensure that the PET has a sufficient phase difference (1000-.
In an embodiment of the present invention, in order to achieve a light and thin display device, the thickness of the birefringence layer is 50 μm in the display device.
When specifically implementing, in the above-mentioned display device that the embodiment of the utility model provides, when the material of compound refraction rete is SRF, because the phase difference value of this kind of material of SRF all is more than or equal to 8000 usually, consequently need not to carry out the thickness management and control, can select the SRF membrane of certain thickness according to actual need.
In specific implementation, in order to improve the quality of shooting by the under-screen camera display device, in the display device provided by the embodiment of the present invention, an included angle between a film-forming stretching direction of the compound refraction film layer and the first direction may be 20 ° to 60 °, and when the included angle is 20 ° to 60 °, part of circularly polarized light may pass through the polarizer.
In practical implementation, in the display device provided in the embodiment of the present invention, as shown in fig. 8, an included angle between the extending direction of the transmission axis of the polarizer and the first direction (horizontal direction) may be any angle between 0 ° and 180 °.
In practical implementation, as shown in fig. 8, in the display device provided in the embodiment of the present invention, since the included angle between the film-forming stretching direction of the birefringence film layer and the first direction is 20 ° to 60 °, the included angle between the film-forming stretching direction of the birefringence film layer and the extending direction of the transmission axis of the polarizer is 0 ° to 160 °.
In specific implementation, in the above display device provided by the embodiment of the present invention, an included angle between the extending direction of the transmission axis of the polarizer and the first direction (horizontal direction) is generally 0 ° or 45 °, and an included angle between the film-forming stretching direction of the birefringence film layer and the first direction is preferably 45 °, so that circularly polarized light can almost completely pass through the polarizer, and the Mura phenomenon is effectively improved. In particular, as shown in fig. 2 and 3.
In a possible implementation manner, in the display device provided in the embodiment of the present invention, as shown in fig. 2 and fig. 3, an included angle between the stretching direction of the birefringence film 400 and the first direction is 45 °, and when an included angle between the extending direction of the transmission axis of the polarizer 300 and the first direction is preferably 0 °, the Mura phenomenon can be effectively eliminated.
In a possible implementation manner, in the display device provided in the embodiment of the present invention, as shown in fig. 3 and fig. 5, an included angle between the stretching direction of the birefringence film 400 and the first direction is 45 °, and when an included angle between the extending direction of the transmission axis of the polarizer 300 and the first direction is preferably 45 °, the Mura phenomenon can be effectively eliminated.
Specifically, the light conversion principle in the embodiment of the present invention is as shown in fig. 9, and when the external natural light is converted into the linearly polarized light after passing through the window (glass), and when the included angle between the film-forming stretching direction of the multiple-refraction film layer 400 and the first direction (the extending direction of the dust and the first direction are close to perpendicular) is 45 °, the linearly polarized light is converted into the circularly polarized light through the multiple-refraction film layer 400 and then exits into the camera.
It should be noted that, according to the fresnel formula, after the light is refracted, the energy of the P wave (vibration parallel to the incident surface) is greater than that of the S wave (vibration perpendicular to the incident surface), that is, the light is changed from natural light to polarized light. However, external natural light cannot be completely converted into linearly polarized light after passing through the glass, and a part of elliptically polarized light and the like may exist, but most of the linearly polarized light exists.
When concrete implementation, owing to only set up the camera in the light zone of passing light, then can only set up the rete of inflexion in the light zone of passing light, but can cause display device uneven like this, consequently in order to guarantee display device's planarization the embodiment of the utility model provides an among the above-mentioned display device, the rete whole face of inflexion sets up.
In specific implementation, in the above display device provided in the embodiments of the present invention, as shown in fig. 2 to fig. 5, the birefringence film 400 and the polarizer 300 can be bonded by a Pressure Sensitive Adhesive (PSA) or an optical adhesive (OCA), and the embodiment of the present invention does not show the Pressure Sensitive Adhesive (PSA) or the optical adhesive (OCA).
In practical implementation, as shown in fig. 2 to 5, the display device according to an embodiment of the present invention further includes a cover plate 500 on a side of the complex refraction film 400 away from the electroluminescent display panel 100. Specifically, the cover plate 500 may be a glass cover plate or a plastic cover plate.
In a specific implementation manner, as shown in fig. 10-13, in the display device provided in the embodiment of the present invention, the material and the stretching direction setting angle of the birefringence film 400 in fig. 10-13 respectively correspond to the structures shown in fig. 2-5, and the difference from the structures shown in fig. 2-5 is that the birefringence film 400 in the structures shown in fig. 10-13 is reused as a cover plate of the display device. For example, in some foldable or rollable display devices, the above-mentioned compound refraction film layer 400 can be used as a cover plate of a display device.
In specific implementation, when the multiple-refraction film layer is reused as the cover plate, as shown in fig. 10-13, in the display device provided in the embodiment of the present invention, the multiple-refraction film layer 400 needs to be hardened, and the hardness value of the multiple-refraction film layer 400 is greater than or equal to 6H. Optionally, the entire complex refractive film layer 400 may be hardened, or a part of the complex refractive film layer 400 corresponding to the under-screen image capture display area may be hardened.
In addition, the display device provided in the embodiment of the present application further includes a touch functional layer, and the touch functional layer may be located between the electroluminescent display panel 100 and the polarizer 300.
Finally, under the environment that the sunshine appears after rainy day, and when not erasing the vestige of rainwash on the glass window, the utility model people of present case adopt the utility model discloses display device (cell-phone) that the embodiment provided has taken outdoor photo in indoor, is about to the real effect picture of clapping in the Polaroid (POL) outside of compound refraction rete (PET) setting camera display device under the screen, sees stripe (Mura phenomenon) on the window and disappears completely. Therefore, the embodiment of the utility model provides a display device can improve the quality of making a video recording under the screen.
In specific implementation, the display device provided by the embodiment of the present invention may be a full-screen mobile phone as shown in fig. 14, wherein the position of the dashed-line frame is a light-transmitting area BB, that is, the position where the camera 200 is installed, and fig. 14 only schematically illustrates the position of the light-transmitting area BB, and is not limited to this position. Of course, the display device may also be: any product or component with a display function, such as a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should be taken as limitations of the present invention.
Following rainy day after and there is the environment of sunshine for example, the user uses the utility model discloses a display device, when outdoor scene is shot to indoor separating glass (like the window), because there is the dust on outdoor glass surface, when the glass was beaten to the rainwater, form one rain trace on glass, because the refracting index of glass and dust is different, outdoor natural light passes glass and gets into indoor refraction one-tenth linearly polarized light that can take place, because glass is washed away by the rainwater, some positions are clean glass, some positions still have the dust, consequently, through the different positions of glass the polarization state that takes place the indoor linearly polarized light of refraction entering is different, if the direct linearly polarized light of this moment gets into the polaroid, then the linear polarized light of partial region can be absorbed by the polaroid, cause the difference of light and shade degree (the Mura phenomenon) to appear after the formation of image; the utility model discloses a set up the rete of inflection again in one side that the polaroid deviates from electroluminescent display panel, because the rete of inflection again can be circular polarized light with linear polarized light conversion, consequently get into the rete of inflection again before the linear polarized light of above-mentioned different polarization state gets into the polaroid earlier, the rete of inflection again converts linear polarized light into circular polarized light, contained angle between the tensile direction of film-forming and the first direction of rete of inflection again is the acute angle, almost all circular polarized light all can pass the polaroid, then original Mura phenomenon disappears.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (15)
1. A display device comprising an electroluminescent display panel having a display region with a light-transmitting region; the electroluminescent display panel comprises a grid line extending along a first direction and a data line extending along a second direction;
the display device further comprises a camera positioned on the backlight side of the electroluminescent display panel, and the camera is positioned in the light-transmitting area;
the display device further includes: the light source comprises a polaroid positioned on the light emitting side of the electroluminescent display panel and a complex refraction film layer positioned on one side of the polaroid, which deviates from the electroluminescent display panel; wherein the content of the first and second substances,
the compound refraction film layer is configured to convert linearly polarized light into circularly polarized light, and an included angle between a film forming stretching direction of the compound refraction film layer and the first direction is an acute angle.
2. The display apparatus of claim 1, wherein the acute angle is 20 ° -60 °.
3. The display device according to claim 2, wherein an angle between a direction in which a transmission axis of the polarizer extends and the first direction is 0 ° to 180 °.
4. The display device according to claim 2, wherein an angle between a film-forming stretching direction of the birefringent film layer and an extending direction of a transmission axis of the polarizer is 0 ° to 160 °.
5. The display apparatus of claim 2, wherein the acute angle is 45 °.
6. The display device as claimed in claim 1, wherein the retardation value of the complex refractive film layer is in the range of 1000nm to 20000 nm.
7. The display device as claimed in claim 6, wherein the phase difference value of the complex refractive film layer is 5000 nm.
8. The display device as claimed in claim 1, wherein the material of the birefringence film layer is polyethylene terephthalate or super birefringence mylar.
9. The display device according to claim 7, wherein when the material of the birefringent film layer is polyethylene terephthalate, the thickness of the birefringent film layer is 30 μm to 200 μm.
10. The display device according to claim 9, wherein the thickness of the birefringence film layer is 50 μm.
11. The display device of claim 1, wherein the complex refractive film layer is disposed over an entire surface.
12. The display device according to claim 1, wherein the birefringent film layer and the polarizer are bonded to each other by a pressure-sensitive adhesive or an optical adhesive.
13. The display device of claim 1, further comprising a cover plate on a side of the complex refractive film layer facing away from the electroluminescent display panel.
14. The display device of claim 1, wherein the complex refractive film layer is multiplexed as a cover plate of the display device.
15. The display device as claimed in claim 14, wherein the hardness value of the multi-refraction film layer is greater than or equal to 6H.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113720809A (en) * | 2021-09-16 | 2021-11-30 | 京东方科技集团股份有限公司 | Transmittance test equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113720809A (en) * | 2021-09-16 | 2021-11-30 | 京东方科技集团股份有限公司 | Transmittance test equipment |
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