KR101682368B1 - Display device, method of manufacturing the same, and method of hmd interface using the same - Google Patents

Abstract

The display device includes a superstructure, a substructure, and a connecting element. The upper structure includes a display element including a first electrode, a light emitting layer disposed on the first electrode and generating light, and a second electrode disposed on the light emitting layer and transmitting the light, wherein the display element is adjacent External light is introduced into a space between adjacent display elements. Wherein the lower structure includes a display driving circuit which receives an image signal and applies power to the second electrode and overlaps with the first electrode of the upper structure and is disposed below the upper structure, And are spaced apart from each other by a predetermined distance with respect to the vertical direction. The connecting element connects the first electrode to the display driving circuit.

Description

TECHNICAL FIELD [0001] The present invention relates to a display device, a method of manufacturing the display device, and an HVID interface method using the display device,

The present invention relates to a display device, a method of manufacturing the same, and an HID interface method using the same. More particularly, the present invention relates to a display device with an optical sensor with a small size and high resolution, a method of manufacturing the same, and an HID interface method using the same. will be.

Portability is increasing due to miniaturization and weight reduction of electronic devices. In particular, portable electronic communication devices capable of information processing by the development of information communication technology are being developed.

Recently, an optical sensor built-in display incorporating a light sensor in a display device and an interface with the same have been developed.

A problem to be solved by the present invention is to provide a display device with an optical sensor having a small size and high resolution.

SUMMARY OF THE INVENTION The present invention provides a method of manufacturing a display device.

SUMMARY OF THE INVENTION The present invention provides a method for interfacing with a display device using the display device.

A display device for achieving the object of the present invention includes an upper structure, a lower structure, and a connecting element. The upper structure may include a first electrode, a light emitting layer disposed on the first electrode to emit light, and a display element disposed on the light emitting layer and including a second electrode transmitting the light. The lower structure includes a display driving circuit that receives a video signal and applies power to the first electrode. The lower structure is physically separated from the upper structure and spaced apart from the upper structure by a predetermined distance. The connecting element is disposed between the upper structure and the lower structure to connect the first electrode to the display driving circuit.

In one embodiment, the display driving circuit includes a driving transistor Tdri for applying an electric signal to the display element, a capacitor C1 for storing a voltage applied to the driving transistor, and a selection transistor . ≪ / RTI >

In one embodiment, the display element of the superstructure is spaced apart from adjacent display elements to allow external light to enter the space between adjacent display elements, and the substructure is disposed between the display elements An optical sensing element for converting the external light into an electric signal and an optical sensing docking circuit for generating an optical sensing signal using the electric signal received from the optical sensing element.

In one embodiment, the optical sensing readout circuitry includes a transfer transistor (Tx) for transferring the electrical signal generated by the optical sensing element, a reset transistor (Rx) for initializing the optical sensing readout circuit, A driving transistor Dx for driving the signal line SIG with the electric signal read out from the outgoing path and a selection transistor Sx for controlling connection between the driving transistor and the signal line.

In one embodiment, the display driving circuit, the optical sensing element, and the optical sensing readout circuit may be disposed on the same substrate.

In one embodiment, the light emitting layer generates blue light or ultraviolet light, the display device includes a light conversion layer disposed on the second electrode to convert the light generated in the light emitting layer into visible light, And a color filter that is disposed on the display panel and converts the visible light into color light of a primary color.

In one embodiment, the light emitting layer may generate blue light or ultraviolet light, and the display element may further include a light conversion layer disposed on the second electrode to convert the light generated in the light emitting layer into color light of a primary color have.

A display device for achieving the object of the present invention includes an upper structure, a lower structure, and a connecting element. The upper structure includes a light emitting layer for emitting light, and a display electrode disposed at the lower end of the light emitting layer, the first electrode being bonded to the anode and the cathode of the light emitting layer and not interfering with the path of the light generated in the light emitting layer. The lower structure receives a video signal, And a display driving circuit for applying electric power to the anode and the cathode of the light emitting layer through an electrode. The display driving circuit is physically separated from the upper structure and is spaced apart from the vertical structure by a predetermined distance. The connecting element is disposed between the upper structure and the lower structure to connect the first electrode to the display driving circuit.

In one embodiment, the display element of the superstructure is spaced apart from adjacent display elements to allow external light to enter the space between adjacent display elements, and the substructure is disposed between the display elements An optical sensing element for converting the external light into an electric signal and an optical sensing docking circuit for generating an optical sensing signal using the electric signal received from the optical sensing element.

In one embodiment, the optical sensing readout circuitry includes a transfer transistor (Tx) for transferring the electrical signal generated by the optical sensing element, a reset transistor (Rx) for initializing the optical sensing readout circuit, A driving transistor Dx for driving the signal line SIG with the electric signal read out from the outgoing path and a selection transistor Sx for controlling connection between the driving transistor and the signal line.

In the method of manufacturing a display device for achieving the object of the present invention, a display driving circuit is provided on the same plane on a base substrate, a light sensing element for converting external light into an electric signal, To form a light sensing dummy circuit. Then, a connecting element is formed on the display driving circuit. Thereafter, a light emitting layer and a first electrode connected to the light emitting layer are sequentially formed on a separate substrate. Subsequently, the separate substrate on which the light emitting layer and the first electrode are formed is aligned on the base substrate on which the display driving circuit, the optical sensing element, and the optical sensing readout circuit are formed. Next, the first electrode is coupled to the connecting element. Thereafter, the separate substrate is removed from the light emitting layer. Subsequently, a second electrode for transmitting light generated in the light emitting layer is formed on the light emitting layer.

In one embodiment, a method of manufacturing a display device includes forming a light conversion layer on the second electrode to change the light generated in the light emitting layer; And forming a color filter that filters the light generated in the light conversion layer to generate color light of a primary color.

In the method of manufacturing a display device for achieving the object of the present invention, a display driving circuit is provided on the same plane on a base substrate, a light sensing element for converting external light into an electric signal, To form a light sensing dummy circuit. Then, a connecting element is formed on the display driving circuit. Thereafter, a first electrode and a second electrode connected to the light emitting layer are formed on a light emitting layer and a first electrode surface of the light emitting layer on separate substrates. Subsequently, the separate substrate on which the light emitting layer, the first electrode, and the second electrode are formed is aligned on the base substrate on which the display driving circuit, the optical sensing element, and the optical sensing readout circuit are formed. Next, the first electrode is coupled to the connecting element. Thereafter, the separate substrate is removed from the light emitting layer.

The display device includes a first electrode, a light emitting layer disposed on the first electrode to emit light, a second electrode disposed on the light emitting layer and transmitting the light, The display device includes an upper structure spaced apart from an adjacent display device to receive external light into a space between adjacent display devices, and an upper structure receiving a video signal, A display driving circuit which applies electric power and overlaps with the first electrode of the upper structure and is disposed below the upper structure, an optical sensing element which is disposed between the display elements and converts the external light into an electric signal, And a light sensing element A lower structure disposed between the upper structure and the lower structure, the lower structure being physically separated from the upper structure and spaced apart by a predetermined distance with respect to a vertical direction; And a connection element for connecting the electrode to the display driving circuit. In the HMD interface method using the display device, the lock mode is canceled using the user's iris image using the optical sensing element and the optical sensing detour circuit. Then, the controller displays an entry cursor and a command icon on the display device by sensing two or more consecutive blinks or an operation of closing one eye. Thereafter, the movement of the pupil is detected and interlocked with the cursor. Subsequently, the cursor is moved to the command icon. The command icon is then selected through one or more blinks. Thereafter, a command corresponding to the command icon is executed.

According to the present invention as described above, the display device and the display driver circuit can be separated from each other and stacked, so that the display driver circuit can be freely designed regardless of the display device. Accordingly, the aperture ratio of the display device is improved, and various circuits for improving the image quality can be added to the display driver circuit.

In addition, the display driving circuit includes a second transistor for stably charging the first capacitor, and a third transistor and a fourth transistor for compensating an output voltage of the driving transistor, thereby outputting a stable driving voltage.

Further, the display driving circuit stably charges the first capacitor using the signals output from the current scan line and the adjacent scan lines, compensates the drive voltage output from the drive transistor, and outputs a stable drive voltage.

Further, the light sensing element is disposed in another layer physically separated from the display element, so that the influence of the noise due to the display output light generated in the display element is minimized.

In addition, the upper structure blocks light leaking from the display device including the light guide, the light shielding film, and the optical filter, thereby improving the detection accuracy of the light sensing device.

In addition, the display device and the optical sensing device operate in a staggered manner, thereby eliminating the noise caused by the display device and improving the sensing accuracy of the optical sensing device.

In addition, the display elements are arranged in the form of a hexagonal array, thereby maximizing the aperture ratio and improving the image quality.

Also, the optical sensing elements are arranged in the form of a hexagonal array, and errors due to defective elements can be easily corrected using data of the adjacent elements.

Further, the optical sensing element senses only the external light that has passed through the color filter, thereby reducing the noise caused by the display element and improving the detection accuracy.

In addition, the optical sensing readout path includes a reset transistor and a selection transistor, so that noise is reduced and detection accuracy is improved.

Further, the optical sensing dummy circuit detects the external brightness and controls the input of the electric signal to the driving transistor, thereby preventing the driving transistor from deteriorating due to long-term use.

In addition, the second electrode disposed on the upper portion of the light emitting layer includes a line such as a star shape to improve the transmittance of light generated in the light emitting layer.

Therefore, a small size and a high resolution suitable for a microdisplay can be realized by using a three-dimensional lamination process.

Also, since the process cost of the upper structure is reduced and the material of the display device can be variously implemented, it is possible to solve the lifetime problem that can not be solved in a display such as a conventional organic light emitting display. Further, when using a light emitting diode (LED), more stable operation can be realized, and the size of the unit cell can be reduced, so that a high resolution can be realized on a microdisplay.

Further, since the driving circuit portion is physically separated from the display device, the driving circuit portion can be manufactured using a general semiconductor process. Therefore, the stability of the driving circuit portion is excellent, and the problem of deterioration in electrical characteristics occurring when conventional amorphous silicon (a-Si) or polycrystalline silicon is used can be solved.

In addition, since the lower structure and the upper structure are separately manufactured using the three-dimensional lamination process, the driving circuit portion of the lower structure does not affect the area of the display device portion of the upper structure, thereby maximizing the aperture ratio. Furthermore, since the driving circuit can use a general semiconductor process, the stability is improved, and the number and arrangement of the transistors can be freely controlled by virtue of the vertical arrangement of the bottom of the display device. It is therefore possible to add various compensation circuits to the driving circuit.

In addition, since the driving circuit portion and the sensing element of the lower plate can be realized through a general semiconductor process, and the display device of the upper plate can be implemented through a specific process such as a compound semiconductor, the processes of the upper plate and the lower plate can be separated, A bi-directional device can be realized that can simultaneously display and sense at a low cost.

In addition, by separating the driving timing of the display device from the timing of the optical sensing device, it is possible to reduce interference noise generated in the optical sensing device by the display device.

In addition, one optical sensing element is disposed at three contact points of the display elements, and the spatial resolution of the display and the light sensing array is increased due to the arrangement characteristics of the pixel cells. In addition, when an error occurs in the optical sensing element, data correction using the peripheral device data is easy.

Therefore, a color display device having a built-in optical sensing function is possible.

In addition, since the control through the pupil recognition is performed, it is possible to control the apparatus without an additional interface outside the apparatus, thereby reducing the size of the apparatus due to simplification of the interface apparatus and controlling the apparatus without using the hand.

1 is a cross-sectional view illustrating a display device according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a display device according to another embodiment of the present invention.
3 is a cross-sectional view illustrating a display device according to another embodiment of the present invention.
4 is a circuit diagram showing a display device according to an embodiment of the present invention.
5 is a circuit diagram showing a display device according to another embodiment of the present invention.
6 is a circuit diagram showing a display device according to another embodiment of the present invention.
7 is a cross-sectional view illustrating a display device according to another embodiment of the present invention.
8 is a cross-sectional view illustrating a display device according to another embodiment of the present invention.
9 is a cross-sectional view illustrating a display device according to another embodiment of the present invention.
10 is a cross-sectional view illustrating a display device according to another embodiment of the present invention.
11 is a cross-sectional view illustrating a display device according to another embodiment of the present invention.
12 is a cross-sectional view illustrating a display device according to another embodiment of the present invention.
13 is a cross-sectional view illustrating a display device according to another embodiment of the present invention.
14 is a graph illustrating a method of driving a display device according to an embodiment of the present invention.
15 is a plan view showing a display device according to an embodiment of the present invention.
16 is a plan view showing a display device according to another embodiment of the present invention.
17 is a plan view showing a display device according to another embodiment of the present invention.
18 is a plan view showing a display device according to another embodiment of the present invention.
19 is a plan view showing a display device according to another embodiment of the present invention.
20 is a cross-sectional view illustrating a display device according to another embodiment of the present invention.
21 is a sectional view showing a display device according to another embodiment of the present invention.
22 is a circuit diagram showing a light sensing readout circuit according to an embodiment of the present invention.
23 is a circuit diagram showing a light sensing dummy circuit according to another embodiment of the present invention.
24 is a circuit diagram showing a light sensing dummy circuit according to another embodiment of the present invention.
25 to 33 are images showing a manufacturing method of the display device shown in Fig.
34 to 38 are images showing an HMD interface method according to an embodiment of the present invention.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and are herein described in detail. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Similar reference numerals have been used for the components in describing each drawing.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having", etc., are intended to specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, But do not preclude the presence or addition of other features, numbers, steps, operations, elements, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

1 is a cross-sectional view illustrating a display device according to an embodiment of the present invention.

Referring to FIG. 1, a display device includes a superstructure 10 and a substructure 20, and generates display output light IL emitted to a surface of the superstructure 10.

In this embodiment, the display device may further include a connecting element 150 connecting the upper structure 10 and the lower structure 20. [ For example, the connecting element 150 electrically connects the upper structure 10 and the lower structure 20.

In this embodiment, the superstructure 10 includes a display element 100. [ For example, the superstructure 10 may include a plurality of display elements 100. The display device 100 includes a first electrode 110, a second electrode 120, and a light emitting layer 130.

The first electrode 110 is disposed under the display device 100 and applies a current, a voltage, or the like to the light emitting layer 130 according to a signal received from the display driving circuit 170. In this embodiment, the first electrode 110 includes an opaque conductor such as a metal or a metal compound to prevent the light generated in the light emitting layer 130 from proceeding downward. For example, the first electrode 110 may include a metal having a high reflectivity to reflect light generated in the light emitting layer 130 in a predetermined direction. When the first electrode 110 includes a metal having high reflectivity, the brightness of the display device 100 is improved and the sensitivity of the optical sensing element 210 to be disposed in the substructure 20 is improved. In this embodiment, the first electrodes 110 are arranged one by one for each pixel. In an alternative embodiment, the first electrode 110 may be arranged in two or more pixels for each pixel to be used for displaying various images such as a 3D image.

The second electrode 120 is disposed on the upper surface of the display device 100 and faces the first electrode 110. In this embodiment, the second electrode 120 includes a transparent conductive material to transmit the display output light IL generated in the light emitting layer 130. For example, the second electrode 120 may include a metal oxide such as indium tin oxide, indium oxide, and tin oxide, or a metal mesh. In this embodiment, the second electrode 120 may cover a plurality of pixels.

The second electrode 120 may cover the entire surface of the light emitting layer 130, or cover only a part of the light emitting layer 130 in a line form. For example, the second electrode 120 may include a hexagonal star-shaped line (ITO) as shown in FIG.

The light emitting layer 130 is disposed between the first electrode 110 and the second electrode 120 and is disposed between the first electrode 110 and the second electrode 120 by a current, . In this embodiment, the light emitting layer 130 may include various light emitting materials such as an organic electroluminescent material, a quantum dot, and the like.

Light generated in the light emitting layer 130 passes through the second electrode 120 and is emitted as display output light IL.

The substructure 20 includes a display driving circuit 170. The display driving circuit 170 applies a current, a voltage difference, etc. to the display device 100 according to a video signal. In this embodiment, the substructure 20 includes a plurality of display driving circuits 170 arranged in an array form.

The connection element 150 electrically connects the upper structure 10 and the lower structure 20 and transmits the signal output from the display driving circuit 170 to the display element 100. In this embodiment, the connecting element 150 may include various connecting members such as a metal pad, a bump, an anisotropic conductive film (ACF), and a flexible circuit board (FPCB).

According to the present embodiment as described above, the display device 100 and the display driving circuit 170 are separated from each other and laminated, so that the display driving circuit 170 can be freely designed regardless of the display device 100. Accordingly, the aperture ratio of the display device 100 is improved, and various circuits for improving the image quality can be added to the display driver circuit 170.

The display device 100 may include various display devices such as an organic light emitting display device, a liquid crystal display device, an electrophoretic display device, and a light emitting diode.

2 is a cross-sectional view illustrating a display device according to another embodiment of the present invention. In the present embodiment, the remaining components except for the first electrode and the second electrode are the same as those in the embodiment of FIG. 1, so that redundant description of the same components will be omitted.

Referring to Fig. 2, the display device includes a superstructure (10 in Fig. 1) and a substructure (20 in Fig. 1).

 The superstructure (10 in FIG. 1) includes a display element 100 '.

The display device 100 'includes a first electrode 111, a second electrode 112, and a light emitting layer 131.

The upper surface of the light emitting layer 131 has a flat shape and the lower surface has a stepped portion.

The first electrode 111 is formed on the outer surface of the stepped portion formed on the lower surface of the light emitting layer 131 and the second electrode 112 is formed on the inner surface of the stepped portion.

In this embodiment, the thickness of the second electrode 112 is thicker than the thickness of the first electrode 111, and the difference in thickness is the same as the step difference. For example, a metal layer (not shown) filling the step is formed on the light emitting layer 131 having the stepped portion formed thereon, and a part of the metal layer (not shown) is removed using a photolithography process or the like, The first electrode 111 and the second electrode 112 can be formed.

Light is generated in the light emitting layer 131 by the step formed on the light emitting layer 131 and the power applied between the first electrode 111 and the second electrode 112.

In this embodiment, the first electrode 111 and the second electrode 112 include a metal to prevent light generated in the light emitting layer 131 from leaking downward.

According to this embodiment, the first electrode 111 and the second electrode 112 are disposed along the step formed on the lower surface of the light emitting layer 131, and another electrode is formed on the upper surface of the light emitting layer 131 The brightness is improved and the energy consumption is reduced.

3 is a cross-sectional view illustrating a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the second electrode and the polarization display output light are the same as those of the embodiment of FIG. 1, so that redundant description of the same components will be omitted.

Referring to FIG. 3, the display device includes a superstructure 10 and a substructure 20.

The superstructure 10 includes a display element 101.

The display device 101 includes a first electrode 110, a second electrode 121, and a light emitting layer 130.

The second electrode 121 includes thin metal lines arranged in parallel. When the second electrode 121 includes metal lines, an optical phenomenon such as diffraction or interference occurs between adjacent metal lines to polarize the transmitted light.

In the present embodiment, the light generated in the light emitting layer 130 is polarized while passing through the second electrode 121 to generate the polarized display output light PIL.

4 is a circuit diagram showing a display device according to an embodiment of the present invention.

1 and 4, the display driving circuit 170 includes a data line, a scan line, a driving voltage line VDD, a first transistor T1, a driving transistor Tdri, 1 capacitor C1.

The scan lines sequentially apply a scan signal to the input electrodes of the first transistor T1 of the display driving circuit 170 arranged in an array. The data lines are arranged to cross the scan lines and apply data signals to the control electrodes of the first transistors Tl.

The first transistor T1 receives and outputs the data signal of the data line according to the control of the scan signal of the scan line.

The first capacitor C1 is disposed between the output electrode of the first transistor T1 and the driving voltage line VDD to maintain the data signal output from the first transistor T1 for a period of one frame do.

The control electrode and the input electrode of the driving transistor Tdri are connected to the electrodes of the first capacitor C1, respectively. The driving transistor Tdri transfers the electric power charged in the first capacitor C1 to the display element 100 through the pad PAD.

5 is a circuit diagram showing a display device according to another embodiment of the present invention. The remaining components except for the structure for compensating the driving transistor in this embodiment are the same as the embodiment shown in FIG. 4, so that redundant description of the same components is omitted.

1, 4 and 5, the display driving circuit 171 includes a data line data, a scan line scan [n], a sustain voltage line Vsus, a drive voltage line VDD, And includes a transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a driving transistor Tdri, and a first capacitor C1.

The second transistor T2 outputs a sustain voltage applied from the sustain voltage line Vsus by controlling a scan signal applied through a scan line (scan).

The sustain voltage output from the second transistor T2 stably charges the first capacitor C1 by complementing the data voltage output from the first transistor T1.

The third transistor T3 and the fourth transistor T4 compensate the driving voltage outputted from the driving transistor Tdri by the control of the scan signal.

The driving voltage compensated by the third transistor T3 and the fourth transistor T4 is applied to the display element 100 through the pad.

According to the present embodiment as described above, the display driving circuit 171 includes the second transistor T2 for stably charging the first capacitor C1 and the third transistor T3 for compensating the output voltage of the driving transistor Tdri And a fourth transistor T4, and outputs a stable driving voltage.

6 is a circuit diagram showing a display device according to another embodiment of the present invention. The remaining components except for the structure for compensating the driving transistor in this embodiment are the same as the embodiment shown in FIG. 4, so that redundant description of the same components is omitted.

1, 4 and 6, the display driving circuit 172 includes a data line data, a current scan line, an adjacent scan line scanX, a reference voltage line Vref, a driving voltage line A first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a driving transistor Tdri, and a first capacitor C1.

The second transistor T2 outputs a reference voltage applied from the reference voltage line Vref by controlling an adjacent scan signal applied through the adjacent scan line ScanX.

The reference voltage output from the second transistor T2 stably charges the first capacitor C1 by complementing the data voltage output from the first transistor T1.

The third transistor T3 and the fourth transistor T4 compensate the driving voltage output from the driving transistor Tdri by controlling the current scan signal and the adjacent scan signal, respectively.

The driving voltage compensated by the third transistor T3 and the fourth transistor T4 is applied to the display element 100 through the pad.

According to the present embodiment as described above, the display driving circuit 172 stably charges the first capacitor C1 using the signals output from the current scan line and the adjacent scan line (scanX) Compensates the drive voltage output from the sustain driver (Tdri), and outputs a stable drive voltage.

Only the second to fourth transistors T2, T3 and T4 are described as the compensation circuit in the present embodiment. However, since the display driving circuit 172 is separated from the display device 100 and stacked, It is possible to design a compensation circuit.

7 is a cross-sectional view illustrating a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the optical sensing element, the optical sensing readout path, and the optical path are the same as the embodiment shown in FIG. 1, so that redundant description of the same elements is omitted.

Referring to Fig. 7, the display device includes a superstructure 1002, a substructure 1020, and a connecting element 150. Fig. In this embodiment, the superstructure 1002 has a smaller width than the lower structure 1020, and the external light EL is transmitted between the adjacent superstructures 1002. Light passing between adjacent upper structures 1002 is incident on the lower structure 1020.

The superstructure 1002 includes a display element 100. The display device 100 includes a first electrode 110, a second electrode 120, and a light emitting layer 130.

The substructure 1020 includes a display driving circuit 170, a light sensing element 210, and a light sensing bypass circuit 270.

The light sensing element 210 is disposed on the light sensing readout path 270 and is exposed through the adjacent upper structures 1002 to sense the external light EL. In this embodiment, the light sensing element 210 includes various photo sensing elements such as a photodiode, a photogate, and the like to generate an electric signal.

The optical sensing readout circuit 270 receives the electrical signal generated by the optical sensing element 210 and outputs a photo sensing signal.

The display driving circuit 170 is disposed on the same layer as the optical sensing and reading circuit 270.

According to this embodiment, the optical sensing element 210 is disposed on another layer physically separated from the display element 100, and the noise due to the display output light IL generated in the display element 100 The effect is minimized.

8 is a cross-sectional view illustrating a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the light guide are the same as the embodiment shown in FIG. 7, so that redundant description of the same components is omitted.

Referring to Fig. 8, the display device includes a superstructure 1004, a substructure 1020, and a connecting element 150. Fig.

The superstructure 1004 includes a display element 100 and a light guide 260.

The light guide 260 is disposed between the adjacent display elements 100 to guide external light to the photo sensing element 210.

The light guide 260 comprises a transparent solid material. For example, the light guide 260 may include a material having a high refractive index difference from that of the display device 100. When the difference in refractive index between the light guide 260 and the display device 100 is high, the external light EL is totally reflected from the inner surface of the light guide 260, thereby improving the detection efficiency of the light sensing device 210.

9 is a cross-sectional view illustrating a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the light guide are the same as the embodiment shown in FIG. 8, so that duplicate description of the same components will be omitted.

Referring to Fig. 9, the light guide 262 includes an optical tube assembly. For example, the optical guide 262 can be formed by arranging optical fibers, glass fibers, synthetic resin fibers, and the like in the vertical direction.

10 is a cross-sectional view illustrating a display device according to another embodiment of the present invention. In the present embodiment, the remaining components except for the light shielding film are the same as the embodiment shown in FIG. 7, so that a duplicate description of the same components will be omitted.

Referring to Fig. 10, the display device includes a superstructure 1006, a substructure 1020, and a connecting element 150. Fig. In this embodiment, the upper structure 1006 has a smaller width than the lower structure 1020, so that the external light EL is transmitted between the adjacent upper structures 1006.

The upper structure 1006 includes a display element 100 and a light shielding film 240.

The light shielding film 240 covers the side surface of the display device 100 to prevent the display output light IL generated in the display device 100 from leaking.

The light shielding film 240 includes a material having a high reflectivity or a material having a high light absorption rate and high light shielding property. For example, the light-shielding film 240 may include a metal, a metal oxide, a metal nitride, an opaque synthetic resin, and the like. When the light shielding film 240 includes a metal, an insulating layer (not shown) may be further disposed between the light shielding film 240 and the display element 100.

According to the present embodiment, the light shielding film 240 blocks light leaking from the display device 100, thereby improving the detection accuracy of the optical sensing element 210. [

11 is a cross-sectional view illustrating a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the optical filter are the same as the embodiment shown in FIG. 7, so that redundant description of the same components is omitted.

Referring to FIG. 11, the display device includes a superstructure 1008, a substructure 1020, and a connecting element 150. In this embodiment, the upper structure 1008 has a smaller width than the lower structure 1020, so that the external light EL is transmitted between the adjacent upper structures 1008.

The superstructure 1008 includes a display element 100 and an optical filter 250. The optical filter 250 is disposed between the adjacent display elements 100 in the lower layer or the same layer than the first electrode 110. [

In this embodiment, the optical filter 250 filters the external light EL to emit the selected input light SL toward the optical sensing element 210. For example, the optical filer 250 may filter light having the same wavelength as the light emitted from the display device 100, and may pass light corresponding to the detection range of the optical sensing device 210.

The optical filter 250 may include a fluorescent material or a material blocking light of a specific wavelength, or may be formed by laminating materials having different refractive indices. For example, the optical filter 250 may include various optical members such as a fluorescent filter or a double brightness enhancement film (DBEF) formed by laminating materials having different refractive indexes, an anisotropic conductive film (ACF), and a transparent conductive film (TCTF) .

When the optical filter 250 includes a fluorescent material, light of a specific wavelength range can be generated and used for experimental equipment and the like. For example, it can be used for gene experiments using radioactive isotopes.

According to the present embodiment as described above, the upper structure 1008 includes the optical film 250, thereby reducing the noise caused by the display device 100 and improving the detection efficiency of the external light EL.

12 is a cross-sectional view illustrating a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the optical filter are the same as the embodiment shown in Fig. 10, so that redundant description of the same components is omitted.

Referring to FIG. 12, the superstructure 1009 includes a display device 100, a light shielding film 240, and an optical filter 250.

According to this embodiment, the noise due to the display device 100 is minimized and the detection efficiency of the external light EL is improved due to the combined action of the light shielding film 240 and the optical filter 250.

13 is a cross-sectional view illustrating a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the position of the optical filter are the same as the embodiment shown in Fig. 11, so duplicate descriptions of the same components are omitted.

Referring to FIG. 13, the display device includes a superstructure 1002, a substructure 1022, and a connecting element 150. In this embodiment, the superstructure 1002 has a smaller width than the lower structure 1022, so that the external light EL is transmitted between the adjacent superstructures 1002.

The substructure 1022 includes a display driving circuit 170, a light sensing element 210, a light sensing readout circuit 270, and an optical filter 252.

In this embodiment, the optical filter 255 is attached to the optical sensing element 210.

According to the present embodiment as described above, the optical filter 255 is included in the lower structure 1022, thereby facilitating the manufacturing process of the display device 100.

14 is a graph illustrating a method of driving a display device according to an embodiment of the present invention. In this embodiment, the display device is the same as the embodiment shown in Figs. 1 to 13, so that redundant description of the same components is omitted.

Referring to FIGS. 7 and 14, the display operation and the light sensing operation of the display device are performed staggeredly. For example, while the display device 100 is turned on, the light sensing element 210 is turned off, while the light sensing element 210 is turned on while the display element 100 is turned off. ON). At this time, the time during which the driving of the display device 100 and the optical sensing device 210 are crossed can be variously varied. For example, the time at which the display device 100 is turned ON may be longer or shorter than the time at which the optical sensing device 210 is turned ON. Also, the optical sensing element 210 may be turned on after a predetermined time elapses after the display element 100 is turned on and then turned off, and vice versa.

However, in the embodiments of the present invention, the display device may include various components such as the light shielding film 240, the optical filter 250, and the light guide 260, so that the display device 100 and the light sensing device 210 may be simultaneously driven (ON).

According to the present embodiment as described above, the ON time of the display device 100 and the optical sensing device 210 are staggered to eliminate the noise caused by the display device 100 and the optical sensing device 210, The detection accuracy of the sensor is improved.

15 is a plan view showing a display device according to an embodiment of the present invention. In the present embodiment, the remaining components except for the arrangement of the display element and the light sensing element are the same as those of the embodiment shown in Figs. 1 to 14, and a duplicate description of the same elements will be omitted.

Referring to FIGS. 7 and 15, the display devices 100 are arranged in a hexagonal array form.

The light sensing elements 210 correspond to the display elements 100 and are disposed between adjacent display elements 100, respectively.

According to the present embodiment as described above, the display devices 100 are arranged in a hexagonal array shape, thereby maximizing the aperture ratio and improving the image quality. Also, the optical sensing elements 210 are arranged in the form of a hexagonal array, and errors due to defective elements can be easily corrected using data of the adjacent elements.

16 is a plan view showing a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the number of display elements are the same as those in the embodiment shown in FIG. 15, so that duplicated description of the same components will be omitted.

Referring to FIGS. 7 and 16, a main light sensing element 210 and a sub light sensing element 211 are disposed in each display element 100. FIG.

In this embodiment, the main light sensing element 210 and the sub light sensing element 211 are connected to a single optical sensing dummy circuit 270 and the optical sensing dummy circuit 270 can be divided into two, have.

According to this embodiment, data can be easily compensated by using data of adjacent optical sensing elements even if optical sensing elements 210 and 211 are defective.

17 is a plan view showing a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the arrangement of the display element and the light sensing element are the same as those of the embodiment shown in Figs. 1 to 16, so that a duplicated description of the same elements will be omitted.

Referring to FIG. 17, the display devices 100 are arranged in a matrix form.

The light sensing element 210 corresponds to the upper portion of the display element 100, respectively.

18 is a plan view showing a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the arrangement of the display element and the light sensing element are the same as those of the embodiment shown in Figs. 1 to 17, and a duplicated description of the same elements will be omitted.

Referring to FIG. 18, the display devices 100 are arranged in a matrix corresponding to the three primary colors (R, G, and B).

The optical sensing element 210 corresponds to the upper portion of the display element 100 corresponding to green among the display elements 100 of the three primary colors.

19 is a plan view showing a display device according to another embodiment of the present invention. In the present embodiment, the remaining components except for the arrangement of the display element and the light sensing element are the same as those of the embodiment shown in Figs. 1 to 18, so that a duplicate description of the same elements will be omitted.

Referring to FIG. 19, the display devices 100 are arranged in a matrix corresponding to the three primary colors (R, G, and B).

The light sensing element 210 corresponds to the upper portion of the display element 100, respectively.

As described above, the display device 100 and the optical sensing device 210 can be arranged in various ways.

20 is a cross-sectional view illustrating a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the light conversion layer, the color filter, the light guide, and the light shielding film are the same as those in the embodiment shown in Figs. 1 to 19, and thus overlapping description of the same components will be omitted.

Referring to FIG. 20, the upper structure 1010 includes a display element 107, a light shielding film 240, and a light guide 260.

The display device 107 includes a first electrode 110, a second electrode 120, a light emitting layer 130, a light conversion layer 140, and a color filter 160.

The light conversion layer 140 changes the properties of light generated in the light emitting layer 130. In this embodiment, the light emitting layer 130 generates blue light or ultraviolet light, and the light conversion layer 140 includes a phosphor, a fluorescent material, or the like to change the wavelength of light generated in the light emitting layer 130 to generate visible light .

In this embodiment, the light sensing element 210 is out of the sensing range of blue light or ultraviolet light.

The color filter 160 filters the visible light generated by the light conversion layer 140 to emit red light, green light, and blue light as display output light.

According to this embodiment, the light emitting layer 130 generates light that is out of the detection range of the optical sensing element 210, thereby reducing detection errors due to light leakage.

21 is a sectional view showing a display device according to another embodiment of the present invention. In this embodiment, the remaining components except for the light conversion layer, the color filter, the light guide, and the light shielding film are the same as those in the embodiment shown in FIG. 20, so that a duplicated description of the same components will be omitted.

Referring to Fig. 21, the display device includes a superstructure 1011, a substructure 1021, and a connecting member 150. Fig.

The upper structure 1011 includes a display element 108, a light shielding film 240, and a light guide 260.

The display device 108 includes a first electrode 110, a second electrode 120, a light emitting layer 130, a light conversion layer 140, and a color filter 151.

In this embodiment, the color filter 151 extends not only to the display element 108 but also to the area where the light sensing element 210 is disposed.

The color filter 151 filters the visible light generated by the light conversion layer 140 and emits the primary color light of red, green, and blue as the display output light. In this embodiment, the color filter 151 also filters the external light EL to emit the primary color light CL of red, green, and blue to the optical sensing element 211.

The light sensing element 211 of the substructure 1021 has a sensing area corresponding to the primary color light CL of each color filter 151.

According to the present embodiment as described above, the optical sensing element 211 senses only the primary color light CL having passed through the color filter 151, and has a color sensing function.

22 is a circuit diagram showing a light sensing readout circuit according to an embodiment of the present invention. Since the optical sensing readout circuit in the present embodiment can be applied to the display device shown in Figs. 1 to 21, redundant description of the same components will be omitted.

7 and 22, the optical sensing readout circuit 270 includes a reset control electrode RST, a driving transistor Dx, a reset transistor Rx, a selection transistor Sx, and a signal line SIG do.

The electric signal generated by sensing the external light by the optical sensing element 210 is applied to the reset transistor Rx and the driving transistor Dx through the first node PD of the optical sensing readout circuit 270.

The driving transistor Dx outputs a reference voltage by using an electric signal applied through the first node PD as a control signal.

The reset transistor Rx initializes the driving transistor Dx using a reset signal applied through the reset control electrode RST. Noise can be minimized by initializing the driving transistor Dx.

The selection transistor Sx transfers the reference voltage output from the driving transistor Dx to the signal line SIG by using the selection signal applied through the selection control electrode SEL.

According to the present embodiment as described above, the optical sensing readout circuit 270 includes the reset transistor Rx and the selection transistor Sx, so that noise is reduced and the detection accuracy is improved.

23 is a circuit diagram showing a light sensing dummy circuit according to another embodiment of the present invention. The remaining components except for the transfer transistor in this embodiment are the same as those in the embodiment shown in FIG. 22, so that redundant description of the same components will be omitted.

7, 22, and 23, the optical sensing readout circuit 270 includes a transfer transistor Tx, a reset control electrode RST, a driving transistor Dx, a reset transistor Rx, a selection transistor Sx ), And a signal line (SIG).

The electric signal generated by sensing the external light by the optical sensing element 210 is transferred to the reset transistor Rx and the driving transistor Dx through the transfer transistor Tx of the optical sensing readout circuit 270 and the second node FD. .

The transfer transistor Tx outputs an electric signal generated by the optical sensing element 210 using a transfer signal applied through the transfer control electrode TX. The transfer transistor Tx controls the input of the electric signal to the driving transistor Dx.

According to the present embodiment as described above, the optical sensing readout circuit 270 includes the transfer transistor Tx to control the input of the electric signal to the driving transistor Dx, thereby reducing the noise and improving the detection accuracy do.

24 is a circuit diagram showing a light sensing dummy circuit according to another embodiment of the present invention. Since the optical sensing readout circuit in this embodiment can be applied to the display device shown in Fig. 16, a duplicate description of the same components will be omitted.

16 and 24, the optical sensing readout circuit 270 includes a first transfer transistor Tx_0, a second transfer transistor Tx_1, a reset control electrode RST, a driving transistor Dx, a reset transistor Rx, a selection transistor Sx, and a signal line SIG.

The electric signal generated by sensing the external light by the main light sensing element 210 is supplied to the reset transistor Rx and the reset transistor Rx through the first transfer transistor Tx_0 and the second node FD of the light sensing read circuit 270, And is applied to the transistor Dx.

The first transfer transistor Tx_0 outputs the electrical signal generated by the main optical sensing element 210 through the first transfer control electrode TX0 using the first transfer signal. The first transfer transistor Tx_0 controls the electric signal to be input to the driving transistor Dx.

The electric signal generated by sensing the external light by the sub optical sensing element 211 passes through the second transfer transistor Tx_1 and the second node FD of the optical sensing readout circuit 270 to the reset transistor Rx, And is applied to the transistor Dx.

The second transfer transistor Tx_1 outputs the electrical signal generated by the sub-optical sensing element 211 through the second transfer control electrode TX1 using the second transfer signal. The second transfer transistor Tx_1 controls the input of the electric signal to the driving transistor Dx.

According to this embodiment, the optical sensing readout circuit 270 includes a plurality of transfer transistors Tx_0 and Tx_l to facilitate electrical signals generated from the plurality of optical sensing elements 210 and 211 To a light sensing signal.

25 to 33 are images showing a manufacturing method of the display device shown in Fig. 25 to 33 are the same as those of the embodiment shown in Figs. 1 to 24, so that duplicate descriptions of the same components will be omitted.

25 is an image showing a step of forming a display driving circuit, a light sensing element and a light sensing readout circuit, and Fig. 26 is an enlarged image of a part of Fig.

20, 25, and 26, a display driver circuit 170, a light sensing device 210, and a pixel sensing circuit 270 are formed on a base substrate. Are formed in a hexagonal array shape.

27 is an image showing the step of forming a connecting element on the display driving circuit of Fig.

Referring to FIGS. 20 and 27, a connecting element 150 is formed on the display driving circuit 170. In the present embodiment, the connecting element 150 includes a via (Via) and a pad (PAD) disposed on the via (Via).

28 is an image showing a step of forming a light emitting layer and a first electrode on a separate substrate.

Referring to FIGS. 20 and 28, a silicon oxide (Si-Oxide) layer, an emission layer 130, and a first electrode 110 are sequentially formed on a separate silicon substrate Si. In this embodiment, the silicon oxide film covers the entire surface of the silicon substrate Si, and the emission layer 130 and the first electrode 110 have a hexagonal array shape. For example, the emission layer 130 and the first electrode 110 may be formed using a photolithography process.

In another embodiment, the second electrode 120 may be formed on the silicon oxide film (Si-oxide) before the emission layer 130 is formed.

Fig. 29 is an image showing a step of moving the structure produced by Fig. 28 toward the structure of Fig. 27, and Fig. 30 is an image showing a step of combining the structure produced by Fig. 28 with the structure of Fig.

Referring to Figs. 20, 29 and 30, the first electrode 110 of the structure produced by Fig. 28 aligns with the connecting element 150 of the structure produced by Fig.

Thereafter, the first electrode 110 is coupled to the coupling element 150.

31 is an image showing a step of separating a silicon substrate from the structure shown in Fig.

Referring to FIGS. 20 and 31, the light emitting layer 130 and the silicon substrate (Si in FIG. 28) are separated to expose a silicon oxide film.

32 is an image showing the step of forming a second electrode on the silicon oxide film of FIG.

Referring to FIGS. 20 and 32, a second electrode (ITO) 120 including hexagonal star-shaped lines is formed on a silicon oxide film. For example, the second electrode (ITO) 120 may be formed using a photolithographic process.

When the second electrode (ITO, 120) includes hexagonal star-shaped lines, the transmittance is improved and the brightness of the display device is improved. In another embodiment, the second electrode may cover the entire surface of the silicon oxide film or may have various shapes such as hexagonal, square, triangular, and slit shapes.

In another embodiment, if the second electrode 120 is formed together in the step of forming the structure of Fig. 28, the fixing of Fig. 32 may be omitted.

33 is an image showing a step of forming a light conversion layer and a color filter on the second electrode in Fig.

Referring to FIGS. 20 and 33, a phosphor layer 140 and a color filter array 150 are sequentially formed on the second electrode ITO. For example, a phosphorescence layer 140 and a color filter array 150 may be formed through a photolithography process.

34 to 38 are images showing an HMD interface method according to an embodiment of the present invention. In this embodiment, the display device is the same as the embodiment shown in Figs. 7 to 33, and thus redundant description of the same components is omitted. The method shown in FIGS. 34 to 38 is an example of an interface method using a display device according to the present invention, which is a method of controlling the position of a cursor displayed on a display device by detecting movement of the pupil.

34 is an image showing a step of releasing the lock mode through the iris recognition.

Referring to FIGS. 7 and 34, the user is recognized through iris recognition of the user, and the lock mode is released. For example, it is checked whether the image of the iris recognized through the optical sensing elements 210 coincides with the registered iris image of the user. When the image of the iris matches the iris of the registered user, it is determined that the command to release the lock mode is canceled and the lock mode is canceled.

35 is an image showing a step of releasing the lock mode and displaying a command icon on the display element.

Referring to FIGS. 7 and 35, when the lock mode is released, the user can recognize a designated operation such as flickering the eye twice or more continuously or keeping one eye closed for a predetermined period of time, And displays various command icons and cursors on the device 100. [ In the present embodiment, the cursor senses the movement of the iris, moves, and moves on the command icon desired by the user.

36 is an image showing a step of moving an iris image to a command icon to be driven.

Referring to FIGS. 7 and 36, the user moves the pupil to the command icon while confirming the iris image displayed in real time on the display device 100. The light sensing element 210 converts an amount of light that varies depending on the movement of the pupil into an electrical signal, and the display element 100 displays data generated in real time corresponding to the iris image. In this embodiment, the iris image displayed on the display element 100 is used as a kind of cursor.

37 is an image showing a step of inputting a command corresponding to a command icon in which an iris image is arranged.

Referring to FIGS. 7 and 37, a command corresponding to the command icon in which the iris image overlaps is input. In this embodiment, the user blinks consecutively more than once to input commands. In another embodiment, when the iris image is located at the command icon for a predetermined time (e.g., 3 seconds or more), it may be recognized as an input of the command.

In this embodiment, when a command is input, a selection icon is generated and displayed on the display device 100 or an operation designated by the selection icon is executed.

38 is an image showing a step in which the function corresponding to the command icon is executed.

7 and 38, a function corresponding to the command icon is executed according to the input command.

According to the present invention as described above, the display device and the display driver circuit can be separated from each other and stacked, so that the display driver circuit can be freely designed regardless of the display device. Accordingly, the aperture ratio of the display device is improved, and various circuits for improving the image quality can be added to the display driver circuit.

In addition, the display driving circuit includes a second transistor for stably charging the first capacitor, and a third transistor and a fourth transistor for compensating an output voltage of the driving transistor, thereby outputting a stable driving voltage.

Further, the display driving circuit stably charges the first capacitor using the signals output from the current scan line and the adjacent scan lines, compensates the drive voltage output from the drive transistor, and outputs a stable drive voltage.

Further, the light sensing element is disposed in another layer physically separated from the display element, so that the influence of the noise due to the display output light generated in the display element is minimized.

In addition, the upper structure blocks light leaking from the display device including the light guide, the light shielding film, and the optical filter, thereby improving the detection accuracy of the light sensing device.

In addition, the display device and the optical sensing device operate in a staggered manner, thereby eliminating the noise caused by the display device and improving the sensing accuracy of the optical sensing device.

In addition, the display elements are arranged in the form of a hexagonal array, thereby maximizing the aperture ratio and improving the image quality.

Also, the optical sensing elements are arranged in the form of a hexagonal array, and errors due to defective elements can be easily corrected using data of the adjacent elements.

Further, the optical sensing element senses only the external light that has passed through the color filter, thereby reducing the noise caused by the display element and improving the detection accuracy.

In addition, the optical sensing readout path includes a reset transistor and a selection transistor, so that noise is reduced and detection accuracy is improved.

Further, the optical sensing dummy circuit detects the external brightness and controls the input of the electric signal to the driving transistor, thereby preventing the driving transistor from deteriorating due to long-term use.

In addition, the second electrode disposed on the upper portion of the light emitting layer includes a line such as a star shape to improve the transmittance of light generated in the light emitting layer.

Therefore, a small size and a high resolution suitable for a microdisplay can be realized by using a three-dimensional lamination process.

Also, since the process cost of the upper structure is reduced and the material of the display device can be variously implemented, it is possible to solve the lifetime problem that can not be solved in a display such as a conventional organic light emitting display. Further, when using a light emitting diode (LED), more stable operation can be realized, and the size of the unit cell can be reduced, so that a high resolution can be realized on a microdisplay.

Further, since the driving circuit portion is physically separated from the display device, the driving circuit portion can be manufactured using a general semiconductor process. Therefore, the stability of the driving circuit portion is excellent, and the problem of deterioration in electrical characteristics occurring when conventional amorphous silicon (a-Si) or polycrystalline silicon is used can be solved.

In addition, since the lower structure and the upper structure are separately manufactured using the three-dimensional lamination process, the driving circuit portion of the lower structure does not affect the area of the display device portion of the upper structure, thereby maximizing the aperture ratio. Furthermore, since the driving circuit can use a general semiconductor process, the stability is improved, and the number and arrangement of the transistors can be freely controlled by virtue of the vertical arrangement of the bottom of the display device. It is therefore possible to add various compensation circuits to the driving circuit.

In addition, since the driving circuit portion and the sensing element of the lower plate can be realized through a general semiconductor process, and the display device of the upper plate can be implemented through a specific process such as a compound semiconductor, the processes of the upper plate and the lower plate can be separated, A bi-directional device can be realized that can simultaneously display and sense at a low cost.

In addition, by separating the driving timing of the display device from the timing of the optical sensing device, it is possible to reduce interference noise generated in the optical sensing device by the display device.

In addition, one optical sensing element is disposed at three contact points of the display elements, and the spatial resolution of the display and the light sensing array is increased due to the arrangement characteristics of the pixel cells. In addition, when an error occurs in the optical sensing element, data correction using the peripheral device data is easy.

Therefore, a color display device having a built-in optical sensing function is possible.

In addition, since the control through the pupil recognition is performed, it is possible to control the apparatus without an additional interface outside the apparatus, thereby reducing the size of the apparatus due to simplification of the interface apparatus and controlling the apparatus without using the hand.

INDUSTRIAL APPLICABILITY The present invention has industrial applicability such as smart glass that can be used for electronic equipment in which a display function and a sensing function are integrally implemented, an inspection apparatus capable of inspecting dielectric materials, pollutants, and the like.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. It will be understood that the invention may be modified and varied without departing from the scope of the invention.

10, 1010: upper structure 20, 1020: lower structure
100, LED: display element 110: first electrode
120: second electrode 130: light emitting layer
140: photo-conversion layer 150: connection element
160: Color filter 170: Display driving circuit
210: optical sensing element 240: light shielding film
250: Optical filter 260: Light guide
270: Optical sensing reading circuit data: Data line
scan: scan line T1: first transistor
T2: second transistor T3: third transistor
T4: fourth transistor C1: capacitor
Tdri: driving transistor Vsus: holding voltage
Vref: Reference voltage VDD: Driving voltage line
PVdd: Panel voltage PAD: Pad
Tx: transfer transistor
TX, TX0, TX1: Transfer control electrode Rx:
RST: reset control electrode Dx: driving transistor
Sx: selection transistor SEL: selection control electrode
PD: First node (Photo Diode)
FD: second node (Floating Diffusion) SIG: signal line
EL: External light SL: Selective input light
IL: Display output light PIL: Polarization display output light

Claims (14)

An upper structure including a first electrode, a display element disposed on the first electrode and including a light emitting layer that generates light, and a second electrode that is disposed on the light emitting layer and transmits the light;
A lower structure physically separated from the upper structure and spaced apart from the upper structure by a predetermined distance with reference to a vertical direction, the display structure including a display driving circuit for receiving a video signal and applying power to the first electrode;
A connection element disposed between the upper structure and the lower structure and connecting the first electrode to the display driving circuit; And
And a light guide disposed between adjacent display elements to guide external light to the light sensing element,
Wherein the optical sensing element is disposed on another layer physically separate from the display element,
The display device of the upper structure is arranged to be spaced apart from adjacent display devices so that external light is introduced into a space between the adjacent display devices, and the lower structure is disposed between the display devices, An optical sensing element for converting an electrical signal into an electrical signal and an optical sensing docking circuit for generating an optical sensing signal using the electrical signal received from the optical sensing element,
Wherein the optical sensing elements are arranged in an array to detect movement of a pupil or flicker of an eyelid, and convert a light amount fluctuating according to movement of the pupil into the electrical signal,
Wherein a plurality of the display devices are arranged in an array form. The display driving circuit according to claim 1, wherein the display driving circuit comprises a driving transistor (Tdri) for applying an electric signal to the display element, a capacitor (C1) for storing a voltage applied to the driving transistor, And a transistor. The display device of claim 1, wherein the display elements are arranged in a hexagonal array, the light sensing elements are arranged in a hexagonal array, and the second electrode comprises a star-shaped line. The optical sensing device according to claim 3, wherein the optical sensing readout circuit includes a transfer transistor (Tx) for transmitting the electrical signal generated by the optical sensing element, a reset transistor (Rx) for initializing the optical sensing readout circuit, A driving transistor (Dx) for driving the signal line (SIG) with the electrical signal read by the readout circuit, and a selection transistor (Sx) for controlling connection between the driving transistor and the signal line. The display device according to claim 3, wherein the display driving circuit, the optical sensing element, and the optical sensing readout circuit are disposed on the same substrate. The light emitting device according to claim 1, wherein the light emitting layer generates blue light or ultraviolet light, the display device includes a light converting layer disposed on the second electrode to convert the light generated in the light emitting layer into visible light, Further comprising a color filter disposed on the display panel to convert the visible light into color light of a primary color. The organic light emitting display according to claim 1, wherein the light emitting layer generates blue light or ultraviolet light, and the display device further includes a light converting layer disposed on the second electrode to convert the light generated in the light emitting layer into color light of a primary color And the display device. An upper structure including a light emitting layer for generating light, and a first electrode disposed at a lower end of the light emitting layer and bonded to the anode and the cathode of the light emitting layer, the first electrode not interfering with the path of the light generated in the light emitting layer;
The first video signal is applied to the first A lower structure including a display driving circuit that applies power to the anode and the cathode of the light emitting layer through an electrode and is physically separated from the upper structure and spaced apart from each other by a predetermined distance in a vertical direction;
A connection element disposed between the upper structure and the lower structure and connecting the first electrode to the display driving circuit; And
And a light guide disposed between adjacent display elements to guide external light to the light sensing element,
Wherein the optical sensing element is disposed on another layer physically separate from the display element,
The display device of the upper structure is arranged to be spaced apart from adjacent display devices so that external light is introduced into a space between the adjacent display devices, and the lower structure is disposed between the display devices, An optical sensing element for converting an electrical signal into an electrical signal and an optical sensing docking circuit for generating an optical sensing signal using the electrical signal received from the optical sensing element,
A plurality of optical sensing elements arranged in an array to detect movement of a pupil or flicker of an eyelid and convert a light amount fluctuating according to movement of a pupil into the electrical signal,
Wherein a plurality of the display devices are arranged in an array form. 9. The display device of claim 8, wherein the display elements are arranged in a hexagonal array, further comprising a second electrode including a star-shaped line, and the optical sensing elements are arranged in a hexagonal array. The optical sensing device of claim 9, wherein the optical sensing readout path includes a transfer transistor (Tx) for transmitting the electrical signal generated by the optical sensing element, a reset transistor (Rx) for initializing the optical sensing readout circuit, A driving transistor (Dx) for driving the signal line (SIG) with the electrical signal read by the readout circuit, and a selection transistor (Sx) for controlling connection between the driving transistor and the signal line. Forming a display driving circuit on the same plane on the base substrate, a light sensing element for converting external light into an electric signal, and a light sensing readout circuit for converting the electric signal into an optical sensing signal;
Forming a connecting element on the display driving circuit;
Sequentially forming a light emitting layer and a first electrode connected to the light emitting layer on a separate substrate;
Aligning the separate substrate on which the light emitting layer and the first electrode are formed on the base substrate on which the display driving circuit, the optical sensing element, and the optical sensing readout circuit are formed;
Coupling the first electrode to the coupling element;
Removing the separate substrate from the light emitting layer; And
And forming a second electrode on the light emitting layer to transmit light generated in the light emitting layer,
Wherein the display device including the light emitting layer and the first electrode are arranged to be spaced apart from each other to allow external light to flow into a space between adjacent display devices and the optical sensing device is disposed between the display devices,
Wherein the optical sensing element is disposed on another layer physically separate from the display element,
A plurality of optical sensing elements arranged in an array to detect movement of a pupil or flicker of an eyelid and convert a light amount fluctuating according to movement of a pupil into the electrical signal,
Wherein a plurality of the display elements are arranged in an array form. 12. The method of claim 11, further comprising: forming a light conversion layer on the second electrode to change the light generated in the light emitting layer; And
And forming a color filter that filters the light generated in the light conversion layer to generate color light of a primary color. Forming a display driving circuit on the same plane on the base substrate, a light sensing element for converting external light into an electric signal, and a light sensing readout circuit for converting the electric signal into an optical sensing signal;
Forming a connecting element on the display driving circuit;
Forming a light emitting layer on a separate substrate and a first electrode and a second electrode connected to the light emitting layer on a first electrode surface of the light emitting layer;
Aligning the separate substrate on which the light emitting layer, the first electrode, and the second electrode are formed on the base substrate on which the display driving circuit, the optical sensing element, and the optical sensing readout circuit are formed;
Coupling the first electrode to the coupling element;
And removing the separate substrate from the light emitting layer,
Wherein the display device including the light emitting layer and the first electrode are arranged to be spaced apart from each other to allow external light to flow into a space between adjacent display devices and the optical sensing device is disposed between the display devices,
Wherein the optical sensing element is disposed on another layer physically separate from the display element,
A plurality of optical sensing elements arranged in an array to detect movement of a pupil or flicker of an eyelid and convert a light amount fluctuating according to movement of a pupil into the electrical signal,
Wherein a plurality of the display elements are arranged in an array form.
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