TW201635515A - Display apparatus - Google Patents

Abstract

A display apparatus including a first substrate, a second substrate opposite to the first substrate, a pixel array disposed between the first substrate and the second substrate and a photoelectric conversion array disposed between the pixel array and the second substrate is provided. The pixel array includes sub-pixel units. An initial light from each of the sub-pixel units converts into an electrical energy and a display light by the photoelectric conversion array. The electrical energy is stored and the display light passes through the second substrate to display an image. Display lights presented by two adjacent sub-pixel units have different wavelengths. The photoelectric conversion array includes photoelectric conversion cells. An area of each of the photoelectric conversion cells covers the two adjacent sub-pixel units and is partially overlapped with an area of another photoelectric conversion cell. Different photoelectric conversion cells covering the same sub-pixel unit have different absorbing wavelengths.

Description

Display device

This invention relates to an optoelectronic device and, more particularly, to a display device.

The display device can be classified into a plurality of types, such as a liquid crystal display device, an organic light emitting diode display device, an electrophoretic display device, etc., wherein the organic light emitting diode display device has an easy thickness and high color saturation. Therefore, it has received much attention in recent years.

In general, the colorization mechanism of an organic light emitting diode display device can be divided into two types. A coloring mechanism is that the organic light emitting diode display device has a plurality of organic light emitting units capable of emitting red light, green light, and blue light, respectively, and the color light is displayed by the organic light emitting unit of each color light. However, due to the high process capability requirements of red, green and blue organic light-emitting units and the high material prices, the application of such display devices is not widespread. Another coloring mechanism is that the organic light emitting diode display device uses an organic light emitting unit capable of emitting light (for example, a white organic light emitting diode layer) and a color filter array to match each other to display a color picture. Benefit from organic light-emitting units capable of emitting light (for example: white organic light-emitting diode layer) The process is simple and the technology of the color filter array is mature, and the application of such a display device is relatively popular. However, such a display device still has the disadvantage of consuming energy because the filtering effect of the color filter array greatly degrades the light energy from the display unit.

The present invention provides a display device capable of displaying a color picture and making more efficient use of energy.

The present invention provides a display device including a first substrate, a second substrate relative to the first substrate, a pixel array disposed between the first substrate and the second substrate, and a pixel array disposed between the pixel array and the second substrate Photoelectric conversion array. The pixel array includes a plurality of sub-pixel units. The initial light from each sub-pixel unit is converted into electrical energy and display light by a photoelectric conversion array. The electrical energy is stored and the display light passes through the second substrate to display a picture. The display lights presented by two adjacent sub-pixel units have different wavelengths. The photoelectric conversion array includes a plurality of photoelectric conversion cells. The area of each photoelectric conversion cell covers two adjacent sub-pixel units and partially overlaps the area of another photoelectric conversion cell. Different photoelectric conversion cells covering the same sub-pixel unit have different absorption wavelengths.

In an embodiment of the invention, the sub-pixel unit includes a plurality of first sub-pixel units, a plurality of second sub-pixel units, and a plurality of third sub-pixel units. The photoelectric conversion cell includes a plurality of first photoelectric conversion cells, a plurality of second photoelectric conversion cells, and a plurality of third photoelectric conversion cells. Each of the first photoelectric conversion cells, each of the second photoelectric conversion cells, and each of the third photoelectric conversion cells respectively have different absorption wavelengths. One of the second photoelectric conversion cells and one of the third light each of the first sub-pixel units are overlapped The electric conversion cells are covered and exposed by the first photoelectric conversion cells such that the display light converted from the initial light from each of the first sub-pixel units has a first color. Each of the second sub-pixel units is covered by one of the first photoelectric conversion cells and one of the third photoelectric conversion cells and is exposed by the second photoelectric conversion cell such that initial light from each of the second sub-pixel units The converted display light has a second color. Each of the third sub-pixel units is covered by one of the first photoelectric conversion cells and one of the second photoelectric conversion cells and is exposed by the third photoelectric conversion cell such that initial light from each of the third sub-pixel units The converted display light has a third color.

In an embodiment of the invention, each of the first photoelectric conversion cells has an absorption wavelength range greater than 620 nm.

In an embodiment of the invention, each of the second photoelectric conversion cells has an absorption wavelength ranging from 500 nm to 620 nm.

In an embodiment of the invention, each of the third photoelectric conversion cells has an absorption wavelength range equal to or less than 500 nm.

In an embodiment of the invention, the first photoelectric conversion cell is closer to the pixel array than the second photoelectric conversion cell and the third photoelectric conversion cell, and the absorption wavelength of the first photoelectric conversion cell is compared to the second photoelectric The absorption wavelength of the conversion cell and the third photoelectric conversion cell is longer.

In an embodiment of the invention, each of the first photoelectric conversion cells overlaps one of the second photoelectric conversion cells and one of the third photoelectric conversion cells to define a light shielding region. a region between adjacent two first photoelectric conversion cells, a region between adjacent two second photoelectric conversion cells, and a region between adjacent two third photoelectric conversion cells The light transmission area is defined separately.

In an embodiment of the invention, each of the sub-pixel units includes an active component and a display unit electrically connected to the active component.

In an embodiment of the invention, the display unit is an organic light emitting diode.

In an embodiment of the invention, the display device further includes a power storage unit and a driving unit. The power storage unit is electrically connected to the photoelectric conversion cell to store electrical energy. The driving unit is electrically connected between the power storage unit and the pixel array. The drive unit uses the electrical energy to drive the sub-pixel unit.

In an embodiment of the invention, the display device further includes a power adjustment unit electrically connected between the photoelectric conversion cell and the power storage unit. The power adjustment unit receives the electrical energy provided by the photoelectric conversion cells having different absorption wavelengths, and transfers the electrical energy to the storage unit for storage after adjusting the electrical energy.

In an embodiment of the invention, the display device further includes a plurality of insulating layers. A plurality of insulating layers are disposed between different photoelectric conversion cells covering the same sub-pixel unit.

In an embodiment of the invention, the display device further includes a color filter array disposed between the second substrate and the photoelectric conversion array.

In an embodiment of the invention, each of the photoelectric conversion cells includes a first electrode, a photoelectric conversion structure, and a second electrode that are sequentially stacked.

In an embodiment of the invention, the photoelectric conversion structure includes an absorber and an emitter.

In an embodiment of the invention, the absorbers of the different photoelectric conversion cells covering the same sub-pixel unit have different absorption wavelengths.

In an embodiment of the invention, the material of the absorber includes CuInSe, CuInGa _(1-x) Se ₂ , CuInGaSeS or a stacked layer of at least two of the above, and x is less than 1.

In an embodiment of the invention, the material of the emitter includes cadmium sulfide, cadmium zinc sulfide, n-type compound semiconductor material or a combination thereof.

Based on the above, the display device according to an embodiment of the present invention is disposed above the pixel array through the photoelectric conversion array to display a color picture. In addition, it is more capable of converting light from a pixel array into electrical energy storage, thereby improving energy efficiency.

The above described features and advantages of the invention will be apparent from the following description.

100, 100A‧‧‧ display device

110‧‧‧First substrate

120‧‧‧second substrate

130‧‧‧ pixel array

132‧‧‧Subpixel unit

132a‧‧‧First display electrode

132b‧‧‧ third sub-pixel unit

132c‧‧‧Second display electrode

132d‧‧‧Display media

132g‧‧‧Second sub-pixel unit

132r‧‧‧ first sub-pixel unit

140‧‧‧ photoelectric conversion array

142‧‧‧Photoelectric conversion cell

142a‧‧‧first electrode

142b‧‧‧ Third photoelectric conversion cell

142c‧‧‧ photoelectric conversion structure

142d‧‧‧ absorber

142e‧‧‧ Emitter

142f‧‧‧second electrode

142g‧‧‧second photoelectric conversion cell

142r‧‧‧first photoelectric conversion cell

150‧‧‧Power storage unit

160‧‧‧ drive unit

170‧‧‧Power adjustment unit

180‧‧‧Insulation

190‧‧‧Color filter array

192b‧‧‧ third filter pattern

192g‧‧‧second filter pattern

192r‧‧‧first filter pattern

194‧‧‧ shading pattern

L‧‧‧Initial light

Lr, lg, lb‧‧‧ display light

D‧‧‧汲

DU‧‧‧ display unit

G‧‧‧ gate

I‧‧‧electric energy

T‧‧‧ active components

R1‧‧‧Light transmission area

R2‧‧‧ shading area

S‧‧‧ source

SE‧‧‧ channel

1 is a cross-sectional view of a display device in accordance with an embodiment of the present invention.

2 is a cross-sectional view showing a sub-pixel unit according to an embodiment of the present invention.

3 is a schematic cross-sectional view showing a photoelectric conversion cell according to an embodiment of the present invention.

4 is a schematic diagram of a partial pixel array, a partial photoelectric conversion array, a power adjustment unit, a power storage unit, and a driving unit of a display device according to an embodiment of the invention.

FIG. 5 is a cross-sectional view of a display device according to another embodiment of the present invention.

1 is a cross-sectional view of a display device in accordance with an embodiment of the present invention. Referring to FIG. 1 , the display device 100 includes a first substrate 110 , a second substrate 120 opposite to the first substrate 110 , a pixel array 130 disposed between the first substrate 110 and the second substrate 120 , and a pixel array disposed on the pixel array. A photoelectric conversion array 140 between the 130 and the second substrate 120. In this embodiment, the first substrate 110 may be a light-transmitting substrate, a light-shielding substrate, or a combination thereof, and the second substrate 120 may be a light-transmitting substrate or a combination of a light-transmitting substrate and a light-shielding substrate. The material of the light-transmitting substrate is, for example, glass, quartz, an organic polymer or other suitable material. The material of the opaque substrate is, for example, a conductive material, a wafer, a ceramic, or other suitable material.

The pixel array 130 includes a plurality of sub-pixel units 132. In this embodiment, the sub-pixel unit 132 can be selectively divided into a plurality of first, second, and third sub-pixel units 132r, 132g, and 132b. An area corresponding to the first sub-pixel unit 132r is used to provide the display light lr having the first color. An area corresponding to the second sub-pixel unit 132g is used to provide the display light lg having the second color. The area corresponding to the third sub-pixel unit 132b is used to provide the display light lb having the third color. The display lights lr, lg, and lb can be mixed into white light. In the present embodiment, the first, second, and third colors of the display lights lr, lg, and lb are, for example, red, green, and blue. However, the present invention is not limited thereto, and the color type of the display light and the number of sub-pixel unit types (that is, the number of colors included in the display light) may be appropriately designed according to actual needs. For example, in other embodiments, in order to increase the color saturation of the display device, the display light may include red light, green light, blue light, and yellow light, and the types of sub-pixel units may be classified into corresponding red light and green light. , blue and yellow Four kinds of light; in order to increase the brightness of the display device, the display light may include red light, green light, blue light and white light, and the types of sub-pixel elements may be classified into four types corresponding to red light, green light, blue light and white light. However, the invention is not limited to the above.

2 is a cross-sectional view showing a sub-pixel unit according to an embodiment of the present invention. Referring to FIG. 2, in the embodiment, each sub-pixel unit 132 includes an active component T and a display unit DU electrically connected to the active component T. The active device T is, for example, a thin film transistor having a source S, a gate G, a drain D and a channel SE. The active device T of FIG. 2 is exemplified by a bottom gate type thin film transistor, but the invention is not limited thereto. In other embodiments, the active device T may also be a top gate type, other suitable form of thin film transistor or Other electronic components. In this embodiment, the display unit DU is, for example, an organic light emitting diode, and includes a first display electrode 132a, a display medium 132d disposed on the first display electrode 132a, and a second display electrode 132c on the display medium 132d. The first display electrode 132a is electrically connected to the drain D of the active device T. One of the first display electrode 132a and the second display electrode 132c serves as an anode and the other serves as a cathode to control whether or not the display medium 132d emits light. The display medium 132d is, for example, a white organic light-emitting layer that emits white initial light L. The material of the first display electrode 132a and the second display electrode 132c may be any conductive material. However, in order to make the white initial light L transparent, the material of the second display electrode 132c may be selected as a light-transmitting conductive material or a combination of a light-transmitting conductive material and a light-shielding conductive material. For example, the light-transmitting conductive material is, for example, indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium antimony zinc oxide, or other suitable oxide, or at least two of the above Stacking. The light-shielding conductive material is, for example, an alloy, a nitride of a metal material, An oxide of a metal material, an oxynitride of a metal material, or a stacked layer of a metal material and other conductive materials, but the invention is not limited thereto.

It should be noted that the form of the sub-pixel unit of FIG. 2 and the above is only for explaining the present invention and is not intended to limit the present invention. The sub-pixel unit of the present invention is not limited to the organic light-emitting diode sub-pixel unit. In other embodiments, the sub-pixel unit may be other suitable patterns. For example, in other embodiments, the display medium 132d disposed on the first display electrode 132a may be of other kinds, such as liquid crystal. As such, the first display electrode 132a and the second display electrode 132c may be a pixel electrode and a common electrode, respectively. In the design of the display medium sandwiched between the pixel electrode and the common electrode, the sub-pixel unit may be a pixel unit of a twisted nematic (TN) or vertically aligned (VA) mode. In addition, in other embodiments, when liquid crystal is used as the display medium, the common electrode and the pixel electrode may be located on the same side of the display medium. In this case, the sub-pixel unit may be a sub-pixel unit of an In-Plane Switching (IPS) type or a Fringe Field Switching (FFS) mode.

Referring to FIG. 1, the photoelectric conversion array 140 includes a plurality of photoelectric conversion cells 142. In the present embodiment, the plurality of photoelectric conversion cells 142 are selectively divided into a plurality of first, second, and third photoelectric conversion cells 142r, 142g, and 142b. The first photoelectric conversion cell 142r, the second photoelectric conversion cell 142g, and the third photoelectric conversion cell 142b have different absorption wavelengths, respectively. For example, the first photoelectric conversion cell 142r is for absorbing red light, the second photoelectric conversion cell 142g is for absorbing green light, and the third photoelectric conversion cell 142b is for absorbing blue light. Each of the first sub-pixel units 132r is overlapped by a second photoelectric conversion The cell 142g and a third photoelectric conversion cell 142b are covered and exposed by the plurality of first photoelectric conversion cells 142r. Each of the second sub-pixel units 132g is covered by a first photoelectric conversion cell 142r and a third photoelectric conversion cell 142b which are overlapped and exposed by the plurality of second photoelectric conversion cells 142g. Each of the third sub-pixel units 132b is covered by a first photoelectric conversion cell 142r and a second photoelectric conversion cell 142g which are overlapped and exposed by the plurality of third photoelectric conversion cells 142b. However, the present invention is not limited thereto, the number of photoelectric conversion cell species, the absorption wavelength of various photoelectric conversion cells, and the relative positions between various types of photoelectric conversion cells and various sub-pixel units can be appropriately designed according to actual needs. .

3 is a schematic cross-sectional view showing a photoelectric conversion cell according to an embodiment of the present invention. Referring to FIG. 3, in the embodiment, each of the photoelectric conversion cells 142 includes a first electrode 142a, a second electrode 142f with respect to the first electrode 142a, and photoelectric conversion disposed between the first and second electrodes 142a, 142f. Structure 142c. A portion of the initial light L (shown in FIG. 1) from the sub-pixel unit is converted into electrical energy after passing through the first electrode 142a, the photoelectric conversion structure 142c, and the second electrode 142f. In other words, each photoelectric conversion cell can be considered as a photovoltaic cell structure. The first and second electrodes 142a, 142f may be light transmissive conductive layers. The material of the light-transmitting conductive layer is, for example, indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium antimony zinc oxide, or other suitable oxide, or a stack of at least two of the above, A light-shielding conductive material alloy, a nitride of a metal material, an oxide of a metal material, an oxynitride of a metal material, or a stacked layer of a metal material and other conductive materials, but the invention is not limited thereto.

In detail, the photoelectric conversion structure 142c of the photoelectric conversion cell 142 may include a suction The body 142d and the emitter 142e disposed between the second electrode 142f and the absorber 142d, wherein the absorber 142c is, for example, a semiconductor layer having a specific energy band gap. For example, the energy band gap of the absorber 142d of the first photoelectric conversion cell 142r may be between 1 and 1.2 eV to absorb red and infrared light having a wavelength equal to or greater than 620 nm; the second photoelectric conversion cell 142g The energy band gap of the absorber 142d may be between 1.3 and 1.5 eV to absorb green light having a wavelength of 500 to 620 nm; the energy band gap of the absorber 142d of the third photoelectric conversion cell 142b may be between 1.6 and 1.8. Electron volts to absorb blue, violet, and ultraviolet light at wavelengths of 500 nm or less.

In the present embodiment, the material of the absorber 142d is, for example, CuInSe, CuInGa _(1-x) Se ₂ , CuInGaSeS, or a stacked layer of at least two of the above. If the material of the absorber 142d includes CuInGa _(1-x) Se ₂ , where x is between 0 and 1, by appropriately designing the value of x, the absorber 142d can have a specific band gap to absorb a specific wavelength range. Light (for example: red, green and blue above). For example, according to the 2002 International Conference on Semiconductors Conference Papers (Semiconductor Conference, 2002. CAS 2002 Proceedings. International (Volume: 1)), pp. 199-202, "Preparation of CIGS solar cell components by improved e- The beam ablation technology and control of their final parameters", when x = 0, 0.25 or 1.0, the energy band gap of the CuInGa _(1-x) Se ₂ material may be 1.0, 1.4 or 1.65 electron volts (eV), respectively. Therefore, when the absorber 142d is made of a CuInGa _(1-x) Se ₂ material, the desired band gap can be obtained by adjusting the value of x. However, the manner in which the band gap of the absorber 142d can be adjusted is not limited to the above. In other embodiments, the absorber 142d may be adjusted by other suitable means (for example, changing the carrier doping concentration of the absorber 142d, the degree of crystallization, etc.). Band gap. The material of the emitter 142e may be cadmium sulfide, cadmium zinc sulfide, an n-type compound semiconductor material, or other suitable material. The n-type compound semiconductor material is, for example but not limited to, an n-type II-VI compound semiconductor. The n-type II-VI compound semiconductor such as zinc selenide or cadmium selenide, but the invention is not limited thereto.

It should be noted that although the semiconductor photovoltaic cell structure is taken as an example to describe one of the photoelectric conversion cells, the type of the photoelectric conversion cell of the present invention is not limited to the semiconductor photovoltaic cell structure. In other embodiments, the photoelectric conversion cell may also be other suitable forms of photovoltaic cell structures, such as a dye-sensitized photovoltaic cell structure, a photovoltaic cell structure of a polymer blended carbon sixty and its derivatives, and a polymer blended inorganic. Photovoltaic cell structure of nano particles, photovoltaic cell structure of organic blending materials, and the like.

4 is a schematic diagram of a partial pixel array, a partial photoelectric conversion array, a power adjustment unit, a power storage unit, and a driving unit of a display device according to an embodiment of the invention. Referring to FIG. 1 and FIG. 4, the initial light L from each sub-pixel unit passes through the photoelectric conversion array 140 and is converted into electric energy I and display light lr, lg, lb. The area of each of the photoelectric conversion cells 142 covers two adjacent sub-pixel units 132 and partially overlaps the area of the other photoelectric conversion cells 142, and the different photoelectric conversion cells 142 covering the same sub-pixel unit 132 have different absorptions. wavelength. Thereby, when the initial light L passes through the different photoelectric conversion cells 142 above the same sub-pixel unit 132, part of the initial light L is absorbed by the different photoelectric conversion cells 142 of the phase stack, thereby causing the display light lr, lg, Lb presents a specific color. In addition, the display lights lr, lg presented by the adjacent two sub-pixel units 132 have different wavelengths (ie, different colors). So come from The display lights lr, lg, and lb of the sub-pixel unit 132 can constitute a color display screen.

For example, the initial light L (for example, white light) from each of the first sub-pixel units 132r is partially absorbed by a second photoelectric conversion cell 142g and a third photoelectric conversion cell 142b that overlap each other and passes through the second substrate. After 120, a display light lr having a first color (for example, red) is formed. The initial light L from each of the second sub-pixel units 132g is partially absorbed by a first photoelectric conversion cell 142r and a third photoelectric conversion cell 142b, and is passed through the second substrate 120 to form a second color. (for example: green) display light lg. The initial light L from each of the third sub-pixel units 132b is partially absorbed by a first photoelectric conversion cell 142r and a second photoelectric conversion cell 142g which are overlapped and passed through the second substrate 120 to form a third color. (for example: green) display light lg. The display lights lr, lg, and lb from the first, second, and third sub-pixel units 132r, 132g, and 132b can constitute a display screen having a specific color.

Referring to FIG. 1 and FIG. 4, in the embodiment, each of the first photoelectric conversion cells 142r is overlapped with one of the second photoelectric conversion cells 142g and one of the third photoelectric conversion cells 142b to define a light shielding region R2. A region between the adjacent two first photoelectric conversion cells 142r, a region between the adjacent two second photoelectric conversion cells 142g, and a region between the adjacent two third photoelectric conversion cells 142b define a light transmission, respectively. District R1. Each of the light transmissive regions R1 overlaps with the first display electrode 132a (shown in FIG. 2) of one of the sub-pixel units 132. Each of the light shielding regions R2 overlaps with an active device T (shown in FIG. 2) of one of the sub-pixel units 132 and other light blocking members (for example, a data line electrically connected to the source S of the active device T, etc.). a second photoelectric conversion cell 142g and a third layer overlapping each other on the light transmissive region R1 of the first sub-pixel unit 132r The photoelectric conversion cell 142b extends further to the light-shielding region R2 of the first sub-pixel unit 132r to overlap the first photoelectric conversion cell 142r covering the third sub-pixel unit 132b to collectively block the initial light L from the pixel array 130. . The first photoelectric conversion cells 142r and the third photoelectric conversion cells 142b overlapping each other on the light-transmitting region R1 of each of the second sub-pixel units 132g extend to the light-shielding region R2 of the second sub-pixel unit 132g to The second photoelectric conversion cells 142g covering the first sub-pixel unit 132r overlap to collectively block the initial light L from the pixel array 130. The first photoelectric conversion cells 142r and the second photoelectric conversion cells 142g overlapping each other on the light transmissive region R1 of each of the third sub-pixel units 132b extend to the light-shielding region R2 of the third sub-pixel unit 132b to The third photoelectric conversion cells 142b covering the second sub-pixel unit 132g overlap to collectively block the initial light L from the pixel array 130. In other words, a portion of the first photoelectric conversion cells 142r, a portion of the second photoelectric conversion cells 142g, and a portion of the third photoelectric conversion cells 142b stacked on each of the light shielding regions R2 can be used as a light shielding layer to avoid The initial light L of the sub-pixel unit 132 is transmitted to the photoelectric conversion cells 142 directly above the adjacent sub-pixel units 132, thereby reducing the probability and/or extent of display color abnormality of the display device 100.

In this embodiment, the first photoelectric conversion cell 142r is closer to the pixel array 130 than the second photoelectric conversion cell 142g and the third photoelectric conversion cell 142b, and the absorption wavelength of the first photoelectric conversion cell 142r is greater than that of the second and third photoelectric groups. The absorption wavelengths of the cells 142g, 142b are converted. In other words, if the plurality of photoelectric conversion cells 142 disposed directly above the sub-pixel unit 132 include the first photoelectric conversion cells 142r, the initial light L first passes through the first photoelectric conversion cells 142r having the longest absorption wavelength. The longer the wavelength in the initial light L, the worse the penetration ability, so if the first photoelectric conversion cell 142r having the longest absorption wavelength is set At the forefront of the initial light L transmission path, the portion of the initial light L having poor penetrability can be absorbed and used without being lost by the other wavelength-converting photoelectric conversion cells 142. Thereby, the photoelectric conversion array 140 can more efficiently convert the initial light L into the electric energy I for use by the display device 100 itself or an external device.

Referring to FIG. 1 and FIG. 4 , the display device 100 can optionally include a power storage unit 150 (shown in FIG. 4 ) electrically connected between the photoelectric conversion array 140 and the pixel array 130 . The power storage unit 150 stores the electric energy I converted by the photoelectric conversion array 140. In the embodiment, the display device 100 may further include a driving unit 160 electrically connected between the power storage unit 150 and the sub-pixel array 130. The driving unit 160 uses the electric energy I to drive the sub-pixel unit. In other words, through the specially designed photoelectric conversion array 140, not only the display device 100 can display a color picture, but also a portion of the initial light L lost for realizing different colors can be converted into the electric energy I. In this embodiment, the electric energy I is more selectively transmitted to the driving unit 160, so that the driving unit 160 can use the electric energy I to drive the sub-pixel unit 132, thereby making the display device 100 more energy-saving, that is, reducing the external The amount of electricity required.

In the present embodiment, the display device 100 may optionally include an insulating layer 180. The insulating layer 180 is disposed between different photoelectric conversion cells covering the same sub-pixel unit. For example, an insulating layer 180 is disposed between the second and third photoelectric conversion cells 142g and 142b covering the same first sub-pixel unit 132r, and the first and third photoelectric conversion cells 142r of the same second sub-pixel unit 132g are covered. An insulating layer 180 is disposed between 142b, and an insulating layer 180 is disposed between the first and second photoelectric conversion cells 142r and 142g covering the same third sub-pixel unit 132b. The material of the insulating layer 180 may be an inorganic material (for example: oxygen A ruthenium oxide, a tantalum nitride, a ruthenium oxynitride, or a stacked layer of at least two materials described above, an organic material, or a combination thereof. It is worth mentioning that, through the arrangement of the insulating layer 180, the photoelectric conversion cells having different absorption wavelengths (for example, the first, second, and third photoelectric conversion cells 142r, 142g, and 142b) convert different electrical energy I (for example, different sizes). The current can be separately transmitted to the power adjustment unit 170 electrically connected between the photoelectric conversion cell 142 and the power storage unit 150. When different electrical energy I are transmitted separately, the electrical energy I can be received by the electrical energy adjustment unit 170 more efficiently. After receiving the different electric energy I, the electric energy adjusting unit 170 can adjust each electric energy I to store the electric energy I to the electric storage unit 150 more efficiently.

FIG. 5 is a cross-sectional view of a display device according to another embodiment of the present invention. The display device 100A of FIG. 5 is similar to the display device 100 of FIG. 1, and thus the same or corresponding elements are denoted by the same or corresponding reference numerals. The difference between the display device 100A and the display device 100 is mainly that the display device 100A further includes a color filter array 190. The following mainly explains the difference. If the two are the same, please refer to the above description according to the reference numerals in FIG. 5, and the description will not be repeated here.

Referring to FIG. 5, the display device 100A includes a first substrate 110, a second substrate 120 opposite to the first substrate 110, a pixel array 130 disposed between the first substrate 110 and the second substrate 120, and a pixel array disposed on the pixel array. A photoelectric conversion array 140 between the 130 and the second substrate 120. The pixel array 130 includes a plurality of sub-pixel units 132. The initial light L from each sub-pixel unit is converted into electrical energy and display light 1 by the photoelectric conversion array 140. The electrical energy is stored and the display light l will pass out of the second substrate 120 to display a picture. The display light l presented by two adjacent sub-pixel units 132 has different waves long. The photoelectric conversion array 140 includes a plurality of photoelectric conversion cells 142. The area of each of the photoelectric conversion cells 142 covers two adjacent sub-pixel units 132 and partially overlaps the area of the other photoelectric conversion cells 142. The different photoelectric conversion cells 142 that cover the same sub-pixel unit 132 have different absorption wavelengths. In the present embodiment, the display device 100A can selectively include the power storage unit 150, the driving unit 160, and the power adjusting unit 170 of FIG. 4 as the display device 100, with respect to the power storage unit 150, the driving unit 160, and the power adjusting unit 170. For the relationship between the other components of the display device 100A, please refer to the above description, and the description will not be repeated here.

The display device 100A differs from the display device 100 in that the display device 100A further includes a color filter array 190. The color filter array 190 is located between the second substrate 120 and the photoelectric conversion cells. The color filter array 190 has a plurality of first, second, and third filter patterns 192r, 192g, and 192b and a light blocking pattern 194. The first, second, and third filter patterns 192r, 192g, and 192b respectively correspond to the first, second, and third sub-pixel units 132r, 132g, and 132b and cover the light-transmitting region R1, and the light-shielding pattern 194 covers the light-shielding region R2. The first filter pattern 192r can further filter out part of the initial light L that is not filtered by the second and third photoelectric conversion cells 142g, 142b, so that the display light lr that passes through the second substrate 120 has a narrower bandwidth. To present a more saturated color. The second filter pattern 192g can further filter out part of the initial light L that is not filtered by the first and third photoelectric conversion cells 142r, 142b, thereby making the display light lg that passes through the second substrate 120 have a narrower bandwidth. To present a more saturated color. The third filter pattern 192b can further filter out part of the initial light L that is not filtered by the first and second photoelectric conversion cells 142r and 142g, thereby making the display light lb passing through the second substrate 120 have a narrower bandwidth. To present more Saturated colors. Thereby, the color saturation of the display device 100A can be further improved. The light-shielding pattern 194 blocks the initial light L of the light-shielding region R2 that is not absorbed by the first, second, and third photoelectric conversion cells 142r, 142g, and 142b, thereby causing the display device 100A to have a higher contrast ratio.

The colors of the first, second, and third filter patterns 192r, 192g, and 192b may depend on the color of the first, second, and third sub-pixel units 132r, 132g, and 132b to be displayed. In this embodiment, the first, second, and third filter patterns 192, 194, and 196 are, for example, red, green, and blue filter patterns to correspond to the first, second, and third sub-pixel units 132r, 132g, and 132b. The display light lr, lg, lb is presented, but the invention is not limited thereto.

In summary, the display device of the embodiment of the present invention realizes display of a color picture through a photoelectric conversion array. Furthermore, the process of the photoelectric conversion array is mature and the process capability is lower than that of the light-emitting organic light-emitting units of the prior art. Therefore, each photoelectric conversion cell of the photoelectric conversion array can be accurately fabricated at a set position to achieve high resolution. Degree of design.

In addition, the display device of the embodiment of the present invention can further convert light that absorbs loss for realizing color into electrical energy through the photoelectric conversion array for storage and utilization. Therefore, the display device of the embodiment of the present invention can save the demand for external energy and simultaneously realize the display of a color picture.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of protection of the present invention This is subject to the definition of the scope of the patent application.

100‧‧‧ display device

110‧‧‧First substrate

120‧‧‧second substrate

130‧‧‧ pixel array

132‧‧‧Subpixel unit

132b‧‧‧ third sub-pixel unit

132g‧‧‧Second sub-pixel unit

132r‧‧‧ first sub-pixel unit

140‧‧‧ photoelectric conversion array

142‧‧‧Photoelectric conversion cell

142b‧‧‧ Third photoelectric conversion cell

142g‧‧‧second photoelectric conversion cell

142r‧‧‧first photoelectric conversion cell

180‧‧‧Insulation

L‧‧‧Initial light

Lr, lg, lb‧‧‧ display light

R1‧‧‧Light transmission area

R2‧‧‧ shading area

Claims (18)

A display device includes: a first substrate; a second substrate opposite to the first substrate; a pixel array disposed between the first substrate and the second substrate, the pixel array comprising a plurality of sub-pictures And a photoelectric conversion array disposed between the pixel array and the second substrate, an initial light from each of the sub-pixel units is converted into an electric energy and a display light by the photoelectric conversion array, the electric energy Stored and the display light passes through the second substrate to display a picture, and the display light presented by two adjacent sub-pixel units has different wavelengths, wherein the photoelectric conversion array includes a plurality of photoelectric conversion cells, each of the photoelectric The area of the switching cell covers two adjacent sub-pixel units and partially overlaps the area of the other photoelectric conversion cell, while the different photoelectric conversion cells covering the same sub-pixel unit have different absorption wavelengths. The display device of claim 1, wherein the sub-pixel units comprise a plurality of first sub-pixel units, a plurality of second sub-pixel units, and a plurality of third sub-pixel units, The photoelectric conversion cell includes a plurality of first photoelectric conversion cells, a plurality of second photoelectric conversion cells, and a plurality of third photoelectric conversion cells, each of the first photoelectric conversion cells, each of the second photoelectric conversion cells, and each of the first The three photoelectric conversion cells respectively have different absorption wavelengths; each of the first sub-pixel units is covered by one of the second photoelectric conversion cells and one of the third photoelectric conversion cells and exposed by the first photoelectric conversion cells Converting the initial light from each of the first sub-pixel elements into The display light has a first color; each of the second sub-pixel units is covered by one of the first photoelectric conversion cells and one of the third photoelectric conversion cells, and is exposed by the second photoelectric conversion cells. And causing the display light converted from the initial light of each of the second sub-pixel units to have a second color; each of the first sub-pixel units being overlapped by one of the first photoelectric conversion cells and A second photoelectric conversion cell is covered and exposed by the third photoelectric conversion cells such that the display light converted from the initial light of each of the third sub-pixel units has a third color. The display device of claim 2, wherein each of the first photoelectric conversion cells has an absorption wavelength range greater than 620 nm. The display device of claim 2, wherein each of the second photoelectric conversion cells has an absorption wavelength ranging from 500 nm to 620 nm. The display device according to claim 2, wherein each of the third photoelectric conversion cells has an absorption wavelength range of 500 nm or less. The display device of claim 2, wherein the first photoelectric conversion cells are closer to the pixel array than the second photoelectric conversion cells and the third photoelectric conversion cells, and the first The absorption wavelength of the photoelectric conversion cell is longer than the absorption wavelengths of the second photoelectric conversion cells and the third photoelectric conversion cells. The display device of claim 2, wherein each of the first photoelectric conversion cells overlaps one of the second photoelectric conversion cells and one of the third photoelectric conversion cells to define a light shielding region, adjacent to two A region between the first photoelectric conversion cells, a region between the adjacent two second photoelectric conversion cells, and a region between the adjacent two third photoelectric conversion cells respectively define a light transmission region. The display device of claim 1, wherein each of the sub-pixel units comprises an active component and a display unit electrically connected to the active component. The display device of claim 1, wherein the display unit is an organic light emitting diode. The display device of claim 1, further comprising: a storage unit electrically connected to the photoelectric conversion cells to store the electrical energy; and a driving unit electrically connected to the storage unit and the Between the pixel arrays, the driving unit uses the electrical energy to drive the sub-pixel units. The display device of claim 10, further comprising a power adjustment unit electrically connected between the photoelectric conversion cells and the power storage unit, the power adjustment unit receiving the photoelectric signals having different absorption wavelengths The electric energy provided by the cell is converted, and after the electric energy is adjusted, the electric energy is transferred to the electric storage unit for storage. The display device according to claim 1, further comprising a plurality of insulating layers disposed between different photoelectric conversion cells covering the same sub-pixel unit. The display device of claim 1, further comprising a color filter array disposed between the second substrate and the photoelectric conversion array. The display device of claim 1, wherein each of the photoelectric conversion cells comprises a first electrode, a photoelectric conversion structure and a second electrode stacked in sequence. The display device of claim 14, wherein the photoelectric conversion The changing structure includes an absorber and an emitter. The display device of claim 15, wherein the absorbers covering different photoelectric conversion cells of the same sub-pixel unit have different absorption wavelengths. The display device according to claim 15, wherein the material of the absorber comprises CuInSe, CuInGa _(1-x )Se ₂ , CuInGaSeS or a stacked layer of at least two of the above, and x is less than 1. The display device of claim 15, wherein the material of the emitter comprises cadmium sulfide, cadmium zinc sulfide, an n-type compound semiconductor material, or a combination thereof.