CN112394553A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN112394553A CN112394553A CN202011447510.5A CN202011447510A CN112394553A CN 112394553 A CN112394553 A CN 112394553A CN 202011447510 A CN202011447510 A CN 202011447510A CN 112394553 A CN112394553 A CN 112394553A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
Abstract
The invention discloses a display panel and a display device. The display panel includes: the array substrate comprises a substrate, an array layer, a light selection layer and a first photoresist layer. The array layer includes a photosensitive device, a switching device, and a capacitive device. The light selective layer at least correspondingly covers the light sensing device, and light rays selectively transmitted by the light selective layer are laser. The light selective layer which selects the transmitted light as the laser is arranged on the light sensing device, so that the light selective layer reflects or absorbs the ambient light and the backlight light source at the light sensing device, the signal interference of the ambient light and the backlight light source is eliminated, the interference of the ambient light and the backlight light source on the light sensing device can be obviously reduced, and the signal-to-noise ratio of the laser sensing display is obviously improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
A Thin film transistor liquid crystal display (TFT-LCD) is widely used in the current flat panel display industry because it is light, Thin, small, low in power consumption, non-radiative, and low in manufacturing cost. In order to broaden the commercial and household functions of the liquid crystal display, various functions such as color temperature sensing, laser sensing, gas sensing and the like are integrated in the display, and the applicable scenes of the liquid crystal display are improved. However, many integrated functions are in the new development stage, and there are many process and related design needs to be perfected to improve the performance of the liquid crystal display with multiple integrated functions.
The laser sensing means that the liquid crystal display senses external laser, and simultaneously transmits the sensed laser signal to the display to indicate that the corresponding position of the liquid crystal display generates color change, so that the liquid crystal display generates corresponding light spots at the laser scanning position and the like.
In practical applications, the laser sensing lcd as a whole receives light from the backlight and ambient light. These lights all illuminate the photosensitive thin film transistor (Sensor TFT) position. The laser-induced sensing liquid crystal display cannot clearly identify the spot information generated by the laser on the display, and further the signal-to-noise ratio of the laser-induced sensing liquid crystal display is influenced.
Disclosure of Invention
The invention provides a display panel and a display device, which can eliminate signal interference of an ambient light source and backlight and improve the signal-to-noise ratio of a laser sensing liquid crystal display.
The present invention provides a display panel including:
the substrate comprises a first surface and a second surface which are oppositely arranged;
an array layer disposed on the first face, the array layer including a photo sensing device disposed adjacent to the switching device, a switching device and a capacitance device disposed at one side of the photo sensing device and spaced apart from the photo sensing device, or a capacitance device disposed at one side of the switching device and spaced apart from the switching device;
the light selective layer is arranged on one side, far away from the first surface, of the array layer, at least correspondingly covers the light sensing device, and the light rays selectively transmitted by the light selective layer are laser light;
the first light resistance layer is arranged on one side, far away from the first surface, of the light selection layer, and the first light resistance layer correspondingly covers the switch device.
In some embodiments, the light selective layer correspondingly covers the photosensitive device, the switching device and the capacitive device.
In some embodiments, the light selective layer is further disposed between the substrate and the array layer, and the light selective layer correspondingly covers the light sensing device and the switching device.
In some embodiments, the light-sensitive device further comprises a second light-blocking layer disposed corresponding to at least the light-sensitive device and the switching device, the second light-blocking layer being disposed between the light-selective layer on a side close to the first face and the first face.
In some embodiments, the light selective layer transmits laser light in a wavelength range of 100nm to 1400 nm.
In some embodiments, the light selective layer comprises two or more sub light selective layers, different sub light selective layers selecting different wavelengths of light to transmit.
In some embodiments, the light selective layer includes a first sub light selective layer and a second sub light selective layer which are stacked, the first sub light selective layer transmits light in a laser light range of 760nm to 1100nm, and the second sub light selective layer transmits light in a laser light range of 100nm to 400 nm.
In some embodiments, the backlight layer is disposed on the second side, the adhesive layer is disposed on a side of the array layer away from the first side, and the adhesive layer covers the array layer, and the cover plate is disposed on a side of the adhesive layer away from the first side.
In some embodiments, the light selective layer is made of a material including one or more of polycarbonate, polymethyl methacrylate, and polypropylene.
The invention provides a display device, which comprises a display panel, wherein the display panel is the display panel.
The display panel provided by the invention comprises a substrate, an array layer, a light selection layer and a first photoresist layer. The substrate comprises a first surface and a second surface which are oppositely arranged. The array layer is arranged on the first face and comprises a light sensing device, a switching device and a capacitor device, the light sensing device is arranged adjacent to the switching device, the capacitor device is located on one side of the light sensing device and has a space with the light sensing device, or the capacitor device is located on one side of the switching device and has a space with the switching device. The light selective layer is arranged on one side, far away from the first face, of the array layer, at least the light selective layer correspondingly covers the light sensing device, and light rays selectively transmitted by the light selective layer are laser. The first light resistance layer is arranged on one side of the light selection layer far away from the first surface, and the first light resistance layer correspondingly covers the switch device. According to the display panel, the light selective layer is arranged on the light sensing device, ambient light and the backlight light source at the light sensing device are reflected or absorbed, signal interference of the ambient light and the backlight light source is eliminated, and the signal-to-noise ratio of the display panel is obviously improved during laser irradiation.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
Fig. 1 is a schematic view of a first structure of a display panel according to the present invention;
FIG. 2 is a schematic structural diagram of a light-sensing device according to the present invention;
FIG. 3 is a schematic diagram of a second structure of a display panel according to the present invention;
FIG. 4 is a schematic diagram of a third structure of a display panel according to the present invention;
FIG. 5 is a schematic diagram of a fourth structure of a display panel according to the present invention;
FIG. 6 is a schematic diagram of a fifth structure of a display panel according to the present invention;
fig. 7 is a schematic view of a sixth structure of the display panel according to the present invention.
Fig. 8 is a schematic structural diagram of a display device according to the present invention.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that in the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The present invention provides a display panel and a display device, and the display panel will be described in detail below.
Referring to fig. 1, fig. 1 is a first structural schematic diagram of a display panel 10 according to the present invention. The display panel 10 includes a substrate 101, an array layer 102, a light selective layer 103, and a first photoresist layer 104. The substrate 101 includes a first surface 101a and a second surface 101b disposed opposite to each other. The array layer 102 is disposed on the first face 101a, the array layer 102 includes a light sensing device 1021, a switching device 1022, and a capacitive device 1023, the light sensing device 1021 is disposed adjacent to the switching device 1022, the capacitive device 1023 is disposed on one side of the light sensing device 1021 and spaced apart from the light sensing device 1021, or the capacitive device 1023 is disposed on one side of the switching device 1022 and spaced apart from the switching device 1022. The light selective layer 103 is disposed on a side of the array layer 102 away from the first surface 101a, the light selective layer 103 at least covers the light sensing device 1021, and the light selectively transmitted by the light selective layer 103 is laser light. The first photoresist layer 104 is disposed on a side of the light selective layer 103 away from the first surface 101a, and the first photoresist layer 104 covers the switching device 1022.
According to the display panel 10 provided by the invention, the light selection layer 103 is arranged on the light sensing device 1021, and the light rays selectively transmitted by the light selection layer 103 are laser light, so that the light selection layer 103 reflects or absorbs the ambient light and the backlight light source at the light sensing device 1021, the signal interference of the ambient light and the backlight light source is eliminated, the interference of the ambient light and the backlight light source on the light sensing device 1021 can be obviously reduced, and the signal-to-noise ratio of the laser sensing display is obviously improved.
The substrate 101 is a functional glass (sensorglass). Specifically, the transparent metal oxide conductive film coating is sputtered on the ultrathin glass and is obtained through high-temperature annealing treatment. The transparent metal oxide may be any one of Indium Gallium Zinc Oxide (IGZO), Indium Zinc Tin Oxide (IZTO), Indium Gallium Zinc Tin Oxide (IGZTO), Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Indium Aluminum Zinc Oxide (IAZO), Indium Gallium Tin Oxide (IGTO), or Antimony Tin Oxide (ATO). The transparent metal oxide has good conductivity and transparency, and is small in thickness, so that the whole thickness of the display panel is not influenced. Meanwhile, the electronic radiation and ultraviolet and infrared light which are harmful to human bodies can be reduced.
The specific structure of the photo sensing device 1021 and the switching device 1022 is a Thin Film Transistor (TFT) structure commonly used in the art. Specifically, referring to fig. 2, fig. 2 is a schematic structural diagram of a light sensing device 1021 in the present invention. The light sensing device 1021(Sensor TFT) includes a gate metal layer 1021a, a first insulating layer 1021b, an active layer 1021c, a source-drain metal layer 1021d, a second insulating layer 1021e, and a transparent conductive layer 1021f, which are sequentially stacked. Fig. 2 illustrates a structure of the optical Sensor device 1021 as an example, and a specific structure of the switching device 1022(Switch TFT) is the same as the optical Sensor device 1021(Sensor TFT), and is not described again here.
The active layer 1021c is made of amorphous Silicon (α -Si), Low Temperature Polysilicon (LTPS), or Indium Gallium Zinc Oxide (IGZO).
The technology for manufacturing the active layer 1021c by using the alpha-Si is simple and mature, has low cost, and is suitable for large-size Liquid Crystal Displays (LCDs) and low-price Electrophoretic displays (EPDs). The LTPS is formed by that amorphous silicon absorbs internal atoms to generate energy level transition deformation after being uniformly irradiated by laser light to form a polycrystalline structure. The active layer 1021c made of LTPS has higher resolution, faster reflection speed, and higher brightness. The active layer 1021c manufactured by IGZO is high in mobility, good in uniformity and simple in manufacturing process. The LTPS is suitable for medium and small sized high-end LCD panels and Active-matrix organic light-emitting diode (AMOLED) panels with higher requirements for resolution and electron moving speed. IGZO has good stability under light irradiation, and IGZO has strong bending properties, and can be used for flexible displays.
When the laser sensing display panel 10 receives laser irradiation, the active layer 1021c in the light sensing device 1021 generates more carriers. The applied voltage makes the carrier move directionally, and a current signal is generated. These current signals are periodically read out after being controlled by the switching device 1022 with timing control. And then, the corresponding position of the display panel 10 is controlled to form signals such as light spots and the like through a series of signal conversion and transmission, and the color change of the corresponding position of the display panel 10 is indicated. Therefore, the light reaching the active layer 1021c of the light sensing device 1021 is wavelength-filtered by the light selective layer 103, so that the active layer 1021c only receives the laser signal to be sensed as much as possible, and the signal-to-noise ratio can be effectively improved.
The first photoresist layer 104 is a black photoresist (BM), which can prevent the switch device 1022 from being irradiated by a light source to generate a leakage current. For different display panels 10, BM may be disposed at a position corresponding to the capacitor device 1023, as required, which is not limited by the invention.
Referring to fig. 3, fig. 3 is a second structural diagram of the display panel 10 according to the present invention. The light selection layer 103 correspondingly covers the light sensing device 1021, the switching device 1022 and the capacitance device 1023. In such an embodiment, the light selection layer 103 may cover the entire surface of the light sensing device 1021, the switching device 1022, and the capacitance device 1023. On one hand, the arrangement can screen and filter the light reaching the array layer 102, so as to better eliminate the influence of the backlight source and the ambient light on the sensor device 1021, and effectively avoid the influence of the light scattering or refraction on the array layer 102; on the other hand, the embodiment can flatten the array layer 102, facilitate the arrangement of the subsequent film layers, and reduce the possibility of falling off of the film layers caused by unevenness in the film layers.
Referring to fig. 4, fig. 4 is a schematic view illustrating a third structure of the display panel 10 according to the present invention. The light selection layer 103 is also disposed between the substrate 101 and the array layer 102, and the light selection layer 103 correspondingly covers the light sensing device 1021 and the switching device 1022.
The light selection layer 103 disposed between the substrate 101 and the array layer 102 can further reduce the influence of the backlight source on the light sensing device 1021, so as to further improve the signal-to-noise ratio of the display panel 10.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating a fourth structure of the display panel 10 according to the present invention. The display panel 10 shown in fig. 5 is different from the display panel 10 shown in fig. 4 in that the display panel 10 further includes a second photoresist layer 105, the second photoresist layer 105 is disposed at least corresponding to the light sensing device 1021 and the switching device 1022, and the second photoresist layer 105 is disposed between the light selection layer 103 on the side close to the first surface 101a and the first surface 101 a.
The second photoresist layer 105 may also be disposed between the array layer 102 and the light selective layer 103 near the first side 101 a. Since the second photoresist layer 105 is used for absorbing the backlight source, the relative position of the second photoresist layer 105 and the light selective layer 103 near the first surface 101a is not limited.
Wherein the wavelength range of the laser transmitted by the light selective layer 103 is 100nm to 1400 nm. Specifically, the wavelength range of the laser light transmitted through the light selective layer 103 is 100nm, 190nm, 193nm, 200nm, 248nm, 280nm, 308nm, 315nm, 320nm, 337nm, 400nm, 488nm, 514nm, 543nm, 633nm, 570nm, 650nm, 694nm, 760nm, 780nm, 1000nm, 1064nm, 1100nm, or 1400 nm.
The light selective layer 103 provided by the present invention can selectively transmit laser light and reflect or absorb ambient light or backlight light, and the specific implementation manner is to select the wavelength of light. Since the wavelength ranges of the laser light to be sensed are different from those of the ambient light and the backlight light source, after the light selection layer 103 is disposed in the display panel 10, the external laser light directly irradiates the light sensing device 1021, the light selection layer 103 only allows the light with the wavelength corresponding to the laser light to pass through, and the light with the non-laser wavelength does not pass through or passes through as little as possible, so that the influence of the ambient light and the backlight light source on the laser sensing is eliminated through such a wavelength selective transmission manner. The signal interference generated by the ambient light and the backlight light source is avoided, so that the signal-to-noise ratio of the display panel 10 can be remarkably improved. In addition, since the light selective layer 103 is wavelength selective transparent, the requirement for the incident angle of light is lower, and ambient light or light scattered or refracted by the backlight source can be better filtered, so that the problem that the display panel 10 cannot accurately identify the current signal generated by the laser can be better solved.
The light selective layer 103 includes more than two sub light selective layers 103, and the wavelength ranges of light selectively transmitted by different sub light selective layers 103 are different. Compared with the single-layer light selection layer 103, the light selection layer 103 which can selectively transmit in a wider wavelength range can be obtained by superposing more than two different sub-light selection layers 103, so that laser left after the setting is more accurate, current signals received by the display panel 10 are more accurate, and display colors are more exquisite.
In one embodiment, the light selective layer 103 includes a first sub light selective layer 103 and a second sub light selective layer 103, which are stacked, the first sub light selective layer 103 transmits laser light with a wavelength ranging from 760nm to 1100nm, and the second sub light selective layer 103 transmits laser light with a wavelength ranging from 100nm to 400 nm. Specifically, the laser light transmitted by the first sub light selection layer 103 is infrared light, and the laser light transmitted by the second violet light selection layer 103 is ultraviolet light. In this embodiment, the first sub light selection layer 103 and the second sub light selection layer 103 are stacked to filter ambient light or backlight light, and at the same time, the light sensing device 1021 has more laser sensing laser beams to transmit ultraviolet light and infrared light, which can widen the application of the laser sensing display panel 10.
Referring to fig. 6, fig. 6 is a schematic diagram of a fifth structure of the display panel 10 according to the present invention. The display panel 10 shown in fig. 6 is different from the display panel 10 shown in fig. 3 in that the display panel 10 further includes a backlight layer 108, an adhesive layer 106, and a cover plate 107, the backlight layer 108 is disposed on the second surface 101b, the adhesive layer 106 is disposed on the side of the array layer 102 away from the first surface 101a, the adhesive layer 106 covers the array layer 102, and the cover plate 107 is disposed on the side of the adhesive layer 106 away from the first surface 101 a.
Referring to fig. 7, fig. 7 is a schematic diagram of a sixth structure of the display panel 10 according to the present invention. The display panel 10 shown in fig. 7 is different from the display panel 10 shown in fig. 5 in that the display panel 10 further includes a backlight layer 108, an adhesive layer 106, and a cover plate 107. The specific arrangement of the backlight layer 108, the adhesive layer 106 and the cover plate 107 is the same as that of the display panel 10 shown in fig. 6, and will not be described herein again.
The arrows in fig. 6 and 7 indicate the direction of light emitted from the backlight layer 108.
As the Adhesive layer 106, an Adhesive material such as an Optical Clear Adhesive (OCA), an ultraviolet Optical Adhesive (UV-OCA), a Liquid Optical Adhesive (LOCA), or a Pressure Sensitive Adhesive (PSA) may be used. The OCA adopted as the adhesive layer can reduce glare, reduce light loss of the display panel 10 and increase contrast of a display picture. The bonding method of the bonding layer using the UV-OCA is simple, and the UV-OCA can reduce the intrusion of external water and oxygen and protect the internal structure of the display panel 10. Therefore, the provision of the adhesive layer 106 can improve the performance of the display panel 10 and can protect the array structure of the display panel 10.
The material used for the light selective layer 103 includes one or more of Polycarbonate (PC), polymethyl methacrylate (PMMA), and polypropylene (PP). Among them, Polycarbonate (PC) and polymethyl methacrylate (PMMA) are infrared light transmitting films, and polypropylene (PP) is ultraviolet light transmitting films.
In fact, the wavelength selective transmission film is more in kind. Therefore, the light selective layer 103 can be a single layer film, a double layer film or a multilayer film, and thus the type and structure of the material of the light selective layer 103 are not limited as long as the light corresponding to the wavelength of the laser is transmitted, and the light of the non-laser wavelength is not transmitted or is transmitted as little as possible.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a display device 100 according to the present invention. Taking the structure of the liquid crystal display device as an example, the display device 100 includes the above display panel 10, the liquid crystal layer 20, and the color film substrate 30, and the display device 100 may further include other devices. The liquid crystal layer 20, the color filter substrate 30, and other devices and their assembly in the present invention are well known to those skilled in the art, and will not be described herein. The structure of the display panel 10 provided by the invention can also be applied to array structures of an OLED display panel, a mini-LED display panel and a micro-LED display panel, and is not described herein again.
The display device 100 provided by the invention comprises a display panel 10, wherein the display panel 10 is provided with a light selection layer which selects transmitted light as laser on a light sensing device, so that the light selection layer can reflect or absorb ambient light and a backlight light source at the light sensing device, the signal interference of the ambient light and the backlight light source is eliminated, the interference of the ambient light and the backlight light source on the light sensing device can be obviously reduced, and the signal-to-noise ratio of the laser sensing display is obviously improved.
The display panel and the display device provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained in the present document by applying specific examples, and the description of the above examples is only used to help understanding the technical scheme and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A display panel, comprising:
the substrate comprises a first surface and a second surface which are oppositely arranged;
an array layer disposed on the first face, the array layer including a photo sensing device disposed adjacent to the switching device, a switching device and a capacitance device disposed at one side of the photo sensing device and spaced apart from the photo sensing device, or a capacitance device disposed at one side of the switching device and spaced apart from the switching device;
the light selective layer is arranged on one side, far away from the first surface, of the array layer, at least correspondingly covers the light sensing device, and the light rays selectively transmitted by the light selective layer are laser light;
the first light resistance layer is arranged on one side, far away from the first surface, of the light selection layer, and the first light resistance layer correspondingly covers the switch device.
2. The display panel of claim 1, wherein the light selective layer covers the photosensitive device, the switching device and the capacitive device.
3. The display panel of claim 1, wherein the light selective layer is further disposed between the substrate and the array layer, and the light selective layer correspondingly covers the light sensing device and the switching device.
4. The display panel according to claim 3, further comprising a second photoresist layer disposed corresponding to at least the photo sensing device and the switching device, the second photoresist layer being disposed between the light selective layer on a side close to the first surface and the first surface.
5. The display panel according to any one of claims 1 to 4, wherein the light selective layer transmits laser light in a wavelength range of 100nm to 1400 nm.
6. The display panel of claim 5, wherein the light selective layer comprises two or more sub light selective layers, and the wavelength ranges of light selectively transmitted by the sub light selective layers are different.
7. The display panel according to claim 6, wherein the light selective layer comprises a first sub light selective layer and a second sub light selective layer stacked together, the first sub light selective layer transmits laser light in a wavelength range of 760nm to 1100nm, and the second sub light selective layer transmits laser light in a wavelength range of 100nm to 400 nm.
8. The display panel according to any one of claims 1 to 4, further comprising a backlight layer provided on the second surface, an adhesive layer provided on a side of the array layer remote from the first surface, and the adhesive layer covering the array layer, and a cover plate provided on a side of the adhesive layer remote from the first surface.
9. The display panel according to any one of claims 1 to 4, wherein the light selective layer is made of a material comprising one or more of polycarbonate, polymethyl methacrylate, and polypropylene.
10. A display device comprising a display panel according to any one of claims 1 to 9.
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| CN202011447510.5A CN112394553A (en) | 2020-12-09 | 2020-12-09 | Display panel and display device |
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| CN202011447510.5A CN112394553A (en) | 2020-12-09 | 2020-12-09 | Display panel and display device |
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| CN112394553A true CN112394553A (en) | 2021-02-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113156697A (en) * | 2021-04-27 | 2021-07-23 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
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