CN212515217U - Display panel based on target tracking technology - Google Patents

Abstract

The embodiment of the utility model discloses display panel based on target tracking technique. The display panel includes: a driving back plate comprising a first electrode layer and a second electrode layer; the light emitting layer is positioned on the driving back plate and covers the first electrode layer; the third electrode layer is positioned on one side of the light-emitting layer away from the driving back plate; the sensing layer and the fourth electrode layer are positioned on one side of the second electrode layer, which is far away from the driving back plate, and the sensing layer is positioned between the second electrode layer and the fourth electrode layer; the driving backboard acquires a signal on the second electrode layer and outputs a driving signal to the first electrode layer so as to control the light emitting layer to emit light according to a signal which is output by the sensing layer and corresponds to the movement of the preset target. Will the embodiment of the utility model provides a when display panel is applied to AR/VR display device, can realize that the real-time tracking people's eye motion and adjust display picture according to this, optimized display device's display effect, strengthened display device's human-computer interaction performance.

Description

Display panel based on target tracking technology

Technical Field

The embodiment of the utility model provides a relate to the display technology, especially relate to a display panel based on target tracking technique.

Background

Virtual Reality (VR) is a technique in which a computer simulates a Virtual environment to give the human an immersive environment. Augmented Reality (AR), a technique that skillfully fuses virtual information with the real world.

At present, display devices based on AR/VR have the problems of easily causing user dizziness, insufficient immersion feeling and poor man-machine interaction performance.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a display panel based on target tracking technique to realize optimizing display panel's display effect, reinforcing display panel's human-computer interaction performance.

The embodiment of the utility model provides a display panel based on target tracking technique, include:

a driving back plate comprising a first electrode layer and a second electrode layer;

the light emitting layer is positioned on the driving back plate and covers the first electrode layer;

the third electrode layer is positioned on one side of the light-emitting layer, which is far away from the driving back plate;

the sensing layer and the fourth electrode layer are positioned on one side, away from the driving back plate, of the second electrode layer, and the sensing layer is positioned between the second electrode layer and the fourth electrode layer;

the driving back plate acquires a signal on the second electrode layer and outputs a driving signal to the first electrode layer so as to control the light emitting layer to emit light according to a signal which is output by the sensing layer and corresponds to the movement of a preset target.

Optionally, the first electrode layer, the light emitting layer, and the third electrode constitute a light emitting unit, and the light emitting unit includes a first light emitting unit, a second light emitting unit, and a third light emitting unit;

the second electrode layer, the sensing layer and the fourth electrode layer form an image sensing unit;

the first light emitting unit, the second light emitting unit, the third light emitting unit and the image sensing unit are arranged in an array.

Optionally, the first electrode layer and the second electrode layer are disposed in the same layer.

Optionally, the first light emitting unit, the second light emitting unit, the third light emitting unit and the image sensing unit are arranged in a grid shape.

Optionally, the method further comprises:

the first packaging layer is positioned on one side, far away from the driving back plate, of the third electrode layer, and the light-emitting unit further comprises the first packaging layer;

and a first protective layer disposed around the light emitting layer, the third electrode layer and a sidewall of the first encapsulation layer in each of the light emitting cells.

Optionally, a material of the first protection layer includes silicon nitride.

Optionally, the method further comprises:

an insulating layer covering the second electrode layer, the sensing layer, and the fourth electrode layer;

the common electrode layer is positioned on one side, far away from the driving backboard, of the insulating layer and is connected with the third electrode layer and the fourth electrode layer through a through hole;

and the second packaging layer is positioned on one side of the common electrode layer, which is far away from the driving back plate.

Optionally, the method further comprises:

the lens is positioned on one side, away from the driving back plate, of the second packaging layer and is arranged corresponding to the area where the sensing layer is positioned;

the cover plate is connected with the second packaging layer through the first adhesive layer.

The utility model discloses technical scheme integrates luminescent layer and sensing layer in display panel jointly for the sensing layer can directly realize the target motion discernment in display panel's demonstration side, with the accuracy that promotes the target recognition result, makes display panel come the accurate control luminescent layer according to the recognition result on sensing layer and carries out luminous demonstration. Will the embodiment of the utility model provides a when display panel is applied to AR/VR display device, can realize that the real-time tracking people's eye motion and adjust the display screen according to this, alleviated the vertigo that current display device arouses, strengthened the sense of immersing when the user uses display device, optimized display device's display effect, promoted display device's biological identification performance to display device's human-computer interaction performance has been strengthened.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present invention;

fig. 2 is a schematic top view of a display panel according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional structure diagram of another display panel according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

As described in the background art, the existing display device has problems that it easily causes user dizziness, insufficient immersion feeling, and poor man-machine interaction performance. To the technical problem, the embodiment of the utility model provides a display panel based on target tracking technique is provided. Fig. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention, as shown in fig. 1, the display panel includes a driving back plate 10, a light emitting layer 210, a third electrode layer 220, a sensing layer 310, and a fourth electrode layer 320; the driving back plate 10 includes a first electrode layer 120 and a second electrode layer 130; the light emitting layer 210 is located on the driving backplane 10 and covers the first electrode layer 120; the third electrode layer 220 is located on the side of the light-emitting layer 210 away from the driving backplane 10; the sensing layer 310 and the fourth electrode layer 320 are positioned on the side of the second electrode layer 130 away from the driving back plate 10, and the sensing layer 310 is positioned between the second electrode layer 130 and the fourth electrode layer 320; the driving backplane 10 acquires the signal on the second electrode layer 130 and outputs a driving signal to the first electrode layer 120, so as to control the light-emitting layer 210 to emit light according to the signal corresponding to the movement of the predetermined target outputted by the sensing layer 310.

Referring to fig. 1, a display panel provided in an embodiment of the present invention may be an Organic Light-Emitting Diode (OLED) display panel or an Organic Light-Emitting Diode Micro display panel (Micro-OLED). The driving backplane 10 may be a silicon-based backplane, and may provide buffering, protection, or support for the display panel. The driving backplane 10 is further provided with a driving circuit, such as a pixel driving circuit or a CMOS driving circuit, for driving the light emitting layer 210 to emit light. The first electrode layer 120 may be an electrode layer disposed corresponding to a light emitting unit in the display panel, for example, the first electrode layer 120 is an anode layer of the light emitting unit. The second electrode layer 130 may be an electrode layer corresponding to the sensing layer 310, for example, the second electrode layer 130 is also an anode layer. The first electrode layer 120 and the second electrode layer 130 may have a three-layer structure, in which the first layer and the third layer may be metal oxide layers, such as Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), and Aluminum Zinc Oxide (AZO), and the middle second layer may be a metal layer (such as silver or copper).

The light emitting layer 210 may be an organic light emitting layer, and the light emitting layer 210 may include only a single layer, that is, only an organic light emitting material layer, or may include a multi-layer structure formed by a hole injection layer, a hole transport layer, a light emitting material layer, an electron transport layer, an electron injection layer, and the like, which are stacked from the first electrode layer 120 to the third electrode layer 220. The sensing layer 310 may be a sensing film layer made of a photosensitive material, and the material of the sensing layer 310 may be amorphous Silicon (a-Si), Low Temperature polysilicon (LTPS, also called p-Si), or reduced Graphene Oxide (rGO). The third electrode layer 220 may be an electrode layer provided corresponding to a light emitting unit in the display panel, for example, the third electrode layer 220 is a cathode layer of the light emitting unit. The fourth electrode layer 320 may be an electrode layer corresponding to the sensing layer 310, e.g. the fourth electrode layer 320 is also a cathode layer. The third electrode layer 220 and the fourth electrode layer 320 may be ITO transparent electrodes or magnesium silver alloy.

The pixel driving circuit in the driving backplane 10 can be electrically connected to the first electrode layer 120 through the via 110 to provide a driving voltage for the first electrode layer 120, so as to drive the light emitting layer 210 to perform light emitting display. The driving circuit in the driving backplane 10 may also be electrically connected to the second electrode layer 130 through the via 110 to provide a driving voltage for the second electrode layer 130 to drive the sensing layer 310 to recognize a predetermined target. Assuming that the preset target is a movable target, in the working process of the display panel, after external ambient light, such as sunlight or light, irradiates the preset target, the external ambient light may be reflected to the sensing layer 310 through the preset target, so that the resistance of the sensing layer 310 changes, and thus a signal output by the sensing layer 310 and corresponding to the movement of the preset target changes. And the processor in the display device can convert the signal output by the sensing layer 310 into position data and motion data of a preset target, so that the driving back plate 10 controls the light emitting layer 210 to emit light according to the position data and the motion data of the preset target.

With reference to fig. 1, in the present embodiment, the working principle of the display panel is further described by taking the case that the display panel is applied to an AR/VR display device based on a target tracking technology, such as an eye tracking technology, for example, and the display panel is applied to a head-mounted display device. In the working process of the display panel, after external environment light rays and the like irradiate human eyes, the sensing layer 310 arranged in the display panel can sense the light rays reflected by each position of the human eyes so as to determine the pupil position information and the eye movement data of the human eyes in real time. The sensing layer 310 may output signals based on the pupil position information and the eye movement data, so that the driving backplane 10 can control the light emitting layer 210 to emit light according to the signals output by the sensing layer 310, and thus, the picture displayed by the display device can be adjusted in real time according to the pupil position and the eye movement of human eyes.

In addition, human-computer interaction can be performed according to the pupil position and the eye movement data of the human eye, for example, when the sensing layer 310 detects that the human eye moves up and down, confirmation (YES) is indicated; a Negative (NO) when the sensing layer 310 detects a left-right movement of the human eye; as another example, when the sensing layer 310 detects a low-frequency blinking motion in the human eye, a confirmation is indicated (YES); a Negative (NO) when the sensing layer 310 detects a high frequency blinking motion in the human eye; when the sensing layer 310 detects that the human eyes move up and down, the page turning up and down is indicated; when the sensing layer 310 detects that the human eye moves left and right, it indicates to turn the page left and right or to select the menu at the upper and lower levels, etc. Therefore, the display panel provided by the embodiment of the invention can replace traditional interaction processes such as touch control, mouse or keyboard input and the like according to the pupil position and eye movement data of human eyes, so that the man-machine interaction is more intelligent.

The embodiment of the utility model provides a technical scheme is integrated in display panel with luminescent layer 210 and sensing layer 310 jointly for sensing layer 310 can directly realize the target motion discernment in display panel's demonstration side, with the accuracy that promotes the target identification result, makes display panel come accurate control luminescent layer 210 to give out light according to the identification result of sensing layer 310 and shows. Will the embodiment of the utility model provides a when display panel is applied to AR/VR display device, can realize that the real-time tracking people's eye motion and adjust the display screen according to this, alleviated the vertigo that current display device arouses, strengthened the sense of immersing when the user uses display device, optimized display device's display effect, promoted display device's biological identification performance to display device's human-computer interaction performance has been strengthened.

Fig. 2 is a schematic top view of a display panel according to an embodiment of the present invention, and with reference to fig. 1 and fig. 2, a first electrode layer 120, a light emitting layer 210, and a third electrode form a light emitting unit, where the light emitting unit includes a first light emitting unit 21, a second light emitting unit 22, and a third light emitting unit 23; the second electrode layer 130, the sensing layer, and the fourth electrode layer 320 constitute the image sensing unit 30; the first light emitting unit 21, the second light emitting unit 22, the third light emitting unit 23, and the image sensing unit 30 are arranged in an array.

In conjunction with fig. 1 and fig. 2, in particular, the light emitting layers 210 in the first light emitting unit 21, the second light emitting unit 22 and the third light emitting unit 23 may be light emitting layers of different light emitting colors, so that the light emitting colors of the first light emitting unit 21, the second light emitting unit 22 and the third light emitting unit 23 are different, and thus the display panel can implement light emitting display of a plurality of different colors. In fig. 1 and 2, the light-emitting layer 210 in the first light-emitting unit 21 is exemplarily configured to be a red light-emitting layer (R), the first light-emitting unit 21 is a red light-emitting unit, the light-emitting layer 210 in the second light-emitting unit 22 is a green light-emitting layer (G), the second light-emitting unit 22 is a green light-emitting unit, the light-emitting layer 210 in the third light-emitting unit 23 is a blue light-emitting layer (B), and the third light-emitting unit 23 is a blue light-emitting unit, so that the display panel can realize light-emitting display of three different colors of RGB. The first light-emitting unit 21, the second light-emitting unit 22, the third light-emitting unit 23 and the image sensing unit 30 are arranged in an array, an image sensing array can be formed in a pixel unit of the display panel, when the display panel is applied to an AR/VR display device, near-distance human eye motion tracking can be achieved through the image sensing array arranged in the display panel, human eye motion recognition results of the image sensing units 30 in the display panel are fused, more accurate eye motion data can be obtained, and therefore pictures displayed by the light-emitting units are adjusted in real time according to positions of pupils of human eyes, and human-computer interaction performance of the display device is improved.

Referring to fig. 1 and 2, the first light emitting unit 21, the second light emitting unit 22, the third light emitting unit 23, and the image sensing unit 30 may be arranged in a checkered pattern. Fig. 1 and 2 exemplarily set the first light emitting unit 21 as a red light emitting unit, the second light emitting unit 22 as a green light emitting unit, and the third light emitting unit 23 as a blue light emitting unit. The image sensing unit 30 does not perform light display, and may be provided in a transparent or translucent structure, and thus may be approximately regarded as a unit displaying white color. The pixel arrangement structure shown in fig. 2 includes a plurality of first repeating pixel units PX10 and second repeating pixel units PX 20. The first repeating pixel unit PX10 includes a first sub-pixel unit PX11 and a second sub-pixel unit PX12, each of which forms a sub-pixel, and the first repeating pixel unit PX10 has eight sub-pixels in total. The first sub-pixel unit PX11 includes four sub-pixels of different colors arranged in two rows each. The second sub-pixel unit PX12 includes four sub-pixels arranged in a row direction as a mirror image of the arrangement of the four sub-pixels of the first sub-pixel unit PX 11. The second repeating pixel unit PX20 includes eight sub-pixels arranged in a mirror image with the arrangement of the eight sub-pixels of the first repeating pixel unit PX10 in the column direction. The plurality of first repeating pixel units PX10 are repeatedly arranged in the row direction, and the plurality of second repeating pixel units PX20 and the first repeating pixel units PX10 are alternately and repeatedly arranged in the column direction, thereby forming a checkered arrangement structure.

Referring to fig. 2, each sub-pixel constitutes one development pixel with adjacent three sub-pixels of different colors, as shown by PX11 or PX 12. In the embodiment, the shape of the display pixel is square, the four sub-pixels are respectively located at four corners of the square, and respectively include a red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and a sensing area S (image sensing unit 30), and the sensing area S formed by the image sensing unit 30 is similar to the white sub-pixel, so that the brightness of the display pixel can be improved. In the same display pixel, the red sub-pixel R is disposed diagonally to the sensing region S, and the blue sub-pixel B is disposed diagonally to the green sub-pixel G. Preferably, the four sub-pixels have the same area, and are arranged so as to control the color displayed by the display pixel.

In addition, as shown in the pixel unit PX30, in the present embodiment, the four red sub-pixel units R are adjacently disposed and arranged in a matrix; the four green sub-pixel units G are adjacently arranged and arranged in a field shape; the four blue sub-pixel units B are adjacently arranged and arranged in a shape of Chinese character 'tian'; the four sensor areas S (image sensor units 30) are arranged adjacent to each other in a matrix. Therefore, the four sub-pixel units with the same color are arranged in a centralized manner, and can be formed in one process in the manufacturing process of the display panel; the four sensing regions S are collectively arranged so that the sensing layers 310 and the fourth electrode layers 320 of the image sensing units 30 in the four sensing regions S can also be formed in one process. Compared with the preparation method that each sub-pixel unit is processed and formed one by one, and the sensing layer 310 and the fourth electrode layer 320 of each image sensing unit 30 are processed and formed one by one, the pixel arrangement structure provided by the embodiment increases the number of sub-pixels in a unit area under the condition of reducing the process precision, meets the pixel density requirement of the micro-display device, and simultaneously can reduce the size of the image sensing unit 30, thereby being beneficial to integrating the image sensing unit 30 in the pixel unit.

Referring to fig. 1, on the basis of the above embodiment, the first electrode layer 120 and the second electrode layer 130 may be disposed in the same layer to ensure that the light emitting units and the image sensing unit 30 are located on the same plane of the display panel, so as to maintain the flatness of the display panel. Therefore, the integration of the light-emitting unit and the image sensing unit in the display panel is facilitated, the collection of the reflected light of the recognition target by the image sensing unit 30 is facilitated, a complex light path does not need to be designed, and the production difficulty and the production cost are reduced.

Fig. 3 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present invention, which may be a schematic partial cross-sectional structure diagram of the display panel in a manufacturing process. As shown in fig. 3, the display panel further includes a first encapsulation layer 230 and a first protection layer 240; the first packaging layer 230 is located on one side of the third electrode layer 220 away from the driving back plate 10, and the light emitting unit further includes the first packaging layer 230; the first protective layer 240 is disposed around sidewalls of the light emitting layer 210, the third electrode layer 220, and the first encapsulation layer 230 in each light emitting unit.

Referring to fig. 3, the first Encapsulation layer 230 may be a Thin-Film Encapsulation (TFE) layer, and the material of the first Encapsulation layer 230 may be an organic Film, an inorganic Film, or an inorganic Film stacked on an organic Film, and the specific material may be, for example, silicon dioxide. The first encapsulation layer 230 covers the third electrode layer 220 to encapsulate the fabricated light emitting unit, thereby protecting the light emitting unit from water and oxygen. The first protection layer 240 is disposed around the sidewalls of the light emitting layer 210, the third electrode layer 220 and the first encapsulation layer 230 in each light emitting unit, preferably, the material of the first protection layer 240 includes silicon nitride, and by disposing the first protection layer 240, the sidewalls of each light emitting unit in the display panel can be protected, thereby further preventing the light emitting units from being corroded by water and oxygen to fail.

Fig. 4 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present invention, which may be a schematic partial cross-sectional structure diagram of the display panel in a manufacturing process. With reference to fig. 3 and 4, the display panel further includes an insulating layer 260, a common electrode layer 270, and a second encapsulation layer 280; the insulating layer 260 covers the second electrode layer 130, the sensing layer 310, and the fourth electrode layer 320; the common electrode layer 270 is located on one side of the insulating layer 260 away from the driving back plate 10, and the common electrode layer 270 is connected with the third electrode layer 220 and the fourth electrode layer 320 through a via hole; the second packaging layer 280 is located on the side of the common electrode layer 270 away from the driving backplane 10.

The insulating layer 260 may be an interlayer insulating layer for insulating each film layer in the image sensing unit 30 from other film layers. The common electrode layer 270 covers one side of the first encapsulation layer 230, the first protection layer 240, and the insulation layer 260 away from the driving backplane 10, and via holes may be opened on one sides of the first encapsulation layer 230 and the insulation layer 260 away from the driving backplane 10, so that the common electrode layer 270 can be connected with the third electrode layer 220 and the fourth electrode layer 320 through the via holes. The common electrode layer 270 may serve as a common electrode for each of the light emitting units and the image sensing unit 30, for example, as a common cathode, and an electric signal can be simultaneously transmitted to each of the light emitting units and the image sensing unit 30 through the common electrode layer 270. Preferably, the material of the common electrode layer 270 may be a semi-transparent conductive material, such as aluminum, silver, or other metal material. This arrangement has an advantage that it can prevent crosstalk between light emitted from the light emitting units and light reflected from the recognition target to the image sensing unit 30, thereby affecting the recognition result of the image sensing unit 30. The material of the second encapsulation layer 280 may be the same as that of the first encapsulation layer 230, for example, the second encapsulation layer 280 may also be an organic film, an inorganic film, or an inorganic film stacked on an organic film, and the specific material thereof may be silicon dioxide. The second encapsulation layer 280 covers the common electrode layer 270 to further protect the common electrode layer 270 and the light emitting unit and the image sensing unit in the display panel.

Referring to fig. 4, the display panel further includes a lens 330, a first glue layer 40, and a cover plate 50; the lens 330 is located on a side of the second packaging layer 280 away from the driving backplane 10 and is disposed corresponding to the area where the sensing layer 310 is located; the cover plate 50 is connected to the second encapsulation layer 280 through the first glue layer 40. Specifically, the Lens 330 may be a Micro Lens (Micro Lens) disposed corresponding to an area where the image sensing unit 30 is located, for converging the reflected light of the recognition target of the image sensing unit 30. Because the display panel comprises the image sensing units 30 arranged in an array, and each image sensing unit 30 is correspondingly provided with one lens 330, a micro-lens array is formed in the display panel to collect the reflected light rays of each direction of the identification target, which is beneficial to accurately identifying the position information and the motion information of the identification target, so that the light emitting unit 20 performs light emitting display according to the position information and the motion information of the identification target, which is beneficial to optimizing the display effect of the display device and improving the human-computer interaction performance of the display device.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (8)

1. A display panel based on object tracking technology, comprising:

a driving back plate comprising a first electrode layer and a second electrode layer;

the light emitting layer is positioned on the driving back plate and covers the first electrode layer;

the third electrode layer is positioned on one side of the light-emitting layer, which is far away from the driving back plate;

the sensing layer and the fourth electrode layer are positioned on one side, away from the driving back plate, of the second electrode layer, and the sensing layer is positioned between the second electrode layer and the fourth electrode layer;

the driving back plate acquires a signal on the second electrode layer and outputs a driving signal to the first electrode layer so as to control the light emitting layer to emit light according to a signal which is output by the sensing layer and corresponds to the movement of a preset target.

2. The display panel according to claim 1, wherein the first electrode layer, the light-emitting layer, and the third electrode constitute a light-emitting unit including a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit;

the second electrode layer, the sensing layer and the fourth electrode layer form an image sensing unit;

the first light emitting unit, the second light emitting unit, the third light emitting unit and the image sensing unit are arranged in an array.

3. The display panel according to claim 1, wherein the first electrode layer and the second electrode layer are disposed on a same layer.

4. The display panel according to claim 2, wherein the first light emitting unit, the second light emitting unit, the third light emitting unit, and the image sensing unit are arranged in a grid shape.

5. The display panel according to claim 2, further comprising:

the first packaging layer is positioned on one side, far away from the driving back plate, of the third electrode layer, and the light-emitting unit further comprises the first packaging layer;

and a first protective layer disposed around the light emitting layer, the third electrode layer and a sidewall of the first encapsulation layer in each of the light emitting cells.

6. The display panel according to claim 5, wherein the material of the first protective layer comprises silicon nitride.

7. The display panel according to claim 5, further comprising:

an insulating layer covering the second electrode layer, the sensing layer, and the fourth electrode layer;

the common electrode layer is positioned on one side, far away from the driving backboard, of the insulating layer and is connected with the third electrode layer and the fourth electrode layer through a through hole;

and the second packaging layer is positioned on one side of the common electrode layer, which is far away from the driving back plate.

8. The display panel according to claim 7, further comprising:

the lens is positioned on one side, away from the driving back plate, of the second packaging layer and is arranged corresponding to the area where the sensing layer is positioned;

the cover plate is connected with the second packaging layer through the first adhesive layer.

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