TWI427675B - Incandescent source display and method for making the same - Google Patents

Description

Incandescent light source display device and preparation method thereof

The present invention relates to a display device, and more particularly to a display device using an incandescent light source as a pixel point.

In the display field, in order to enable the user to normally perceive the motion image, the normal display device must be able to display at least 24 frames of image in one second, that is, the response time of the pixel in the display device is required to be shorter than 41 milliseconds, and the The shorter the response time, the better. At present, the most commonly used cathode cathode ray tube (CRT) display device is used to display a fluorescing powder that is illuminated by an electron beam, and the glow residual time is short, so the conventional cold cathode tube display The response time of the device can reach the order of microseconds, and the displayed picture is relatively smooth. The response time of the pixel of the liquid crystal display device is generally shorter than 25 milliseconds, and even the response time of some liquid crystal display devices has reached 5 milliseconds, which can meet the normal needs of reality.

Since 1879, when Edison invented the Incandescence Light with the electric-thermal-light principle, incandescent light sources have quickly entered people's lives. The materials of incandescent light sources have also evolved from the original carbon fiber and carbonized cotton to various heat-resistant metals or composites. material. The incandescent light source currently in common use is a tungsten incandescent lamp invented by American inventor Kulich in 1908. At present, the response time of a conventional incandescent light source is relatively long. For example, a tungsten wire having a diameter of 15 μm has a response time of more than 100 milliseconds. Therefore, as a person The earliest use, the most widely used, and the simplest driving light source, the incandescent light source has not been successfully applied to the display field for direct display of motion pictures.

In view of the above, it is necessary to provide an incandescent light source display device in which a pixel point is an incandescent light source and is capable of displaying a moving image.

An incandescent light source display device includes a plurality of spaced-apart row electrode leads, a plurality of spaced-apart column electrode leads and a plurality of incandescent light sources. The plurality of row electrode leads and the plurality of column electrode leads are disposed to cross each other, and each adjacent two row electrode leads forms a grid with the adjacent two column electrode leads intersecting therewith, and the row electrode leads and the column electrode leads are electrically insulated . Each grid is provided with an incandescent light source, and each of the incandescent light sources includes a carbon nanotube structure. The carbon nanotube structure is electrically connected to a row electrode lead and a column electrode lead corresponding to the grid, and the carbon nanotube structure has a heat capacity per unit area of less than 2 x 10 ^-4 joules per square centimeter Kelvin.

An incandescent light source display device includes a substrate and a plurality of incandescent light sources. A plurality of parallel spaced row electrode leads and a plurality of parallel spaced column electrode leads are disposed on the substrate surface. The plurality of row electrode leads and the plurality of column electrode leads are perpendicularly disposed to each other, the plurality of row electrode leads and the plurality of column electrode leads are electrically insulated, and each adjacent two row electrode leads forms a grid with the adjacent two column electrode leads . Each grid corresponds to an incandescent light source, and each grid corresponds to one pixel unit. Each incandescent source includes a first electrode, a second electrode, and a carbon nanotube structure. The carbon nanotube structure is disposed between the first electrode and the second electrode and electrically connected to the first electrode and the second electrode, and the first electrode and the second electrode are electrically connected to the column electrode lead and the row electrode lead, respectively. The carbon nanotube structure has a heat capacity per unit area of less than 2 x 10 ^-4 joules per square centimeter of Kelvin.

A method for preparing an incandescent light source display device, comprising the steps of: providing a substrate; forming a plurality of spaced row electrode leads on the substrate surface; forming a plurality of spaced column electrode leads on the substrate surface, and the plurality of row electrode leads And the plurality of column electrode leads are arranged to intersect each other to form a network, and each of the two adjacent row electrode leads intersects with each of the two adjacent column electrode leads crossing the same to form a grid, and the plurality of row electrode leads and the column electrode leads Insulating each other; forming a plurality of first electrodes and second electrodes on the surface of the substrate, forming a first electrode and a second electrode in each of the grids; providing a carbon nanotube structure covering the substrate and the first electrode Electrically contacting the second electrode, wherein the carbon nanotube tube extends substantially along the first electrode toward the second electrode; cutting the carbon nanotube structure to disconnect the carbon nanotube structure in different grids .

An incandescent light source display device comprising a plurality of spaced row electrode leads and a plurality of spaced column electrode leads, wherein the plurality of row electrode leads and the plurality of column electrode leads are disposed to cross each other to form a plurality of grids, and the row electrode leads and The column electrode leads are electrically insulated. And the plurality of incandescent light sources are arranged in one-to-one correspondence with the plurality of grids, each of the incandescent light sources corresponding to one pixel unit, and including a carbon nanotube structure electrically connected to the row electrode lead and the column electrode lead of the corresponding grid, The carbon nanotube structure has a heat capacity per unit area of less than 2 x 10 ^-4 joules per square centimeter of Kelvin.

Compared with the prior art, the incandescent light source display device directly displays an image by using an incandescent light source including a carbon nanotube structure, and the incandescent light source display device can display a dynamic image by using the carbon nanotube structure with a very short response time.

100‧‧‧incandescent light source display device

110‧‧‧Substrate

120‧‧‧ row electrode lead

121‧‧‧First electrode

130‧‧‧ column electrode lead

131‧‧‧second electrode

140‧‧‧Insulator

150‧‧‧incandescent light source

1 is a schematic perspective view showing the structure of an incandescent light source display device according to an embodiment of the present invention.

2 is a top plan view of the incandescent light source display device of FIG. 1.

Figure 3 is a cross-sectional view of the incandescent light source display device of Figure 2 taken along the line III-III.

Figure 4 is a scanning electron micrograph of the incandescent light source of Figure 1.

FIG. 5 is a scanning electron micrograph of the incandescent light source disposed on the first electrode and the second electrode in a plan view.

6 is a scanning electron micrograph of the incandescent light source disposed on the first electrode and the second electrode in a side view.

Figure 7 is a response time diagram of the incandescent light source of Figure 1.

Figure 8 is a graph showing the luminance power of the incandescent light source of Figure 1.

Figure 9 is a graph showing the current and luminescence stability of the incandescent light source of Figure 1.

FIG. 10 is a schematic flow chart of a method for preparing an incandescent light source display device according to an embodiment of the present invention.

The incandescent light source display device of the present invention and a method of fabricating the same will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 3 , an embodiment of the present invention provides an incandescent light source display device 100 including a substrate 110 , a plurality of spaced row electrode leads 120 , a plurality of spaced column electrode leads 130 , a plurality of insulators 140 , and a plurality of incandescent Light source 150 and a plurality of fixed elements 160. The row electrode lead 120 and the column electrode lead 130 are disposed on the surface of the substrate 110, and the row electrode lead 120 and the column electrode lead 130 are disposed to intersect with each other and are insulatedly connected by the insulator 140.

The substrate 110 is used to carry the row electrode lead 120, the column electrode lead 130, and the insulator 140. The material of the substrate 110 is glass, quartz, polymer or ceramic, and can be based on reality. The substrate 110 is prepared to be flexible or rigid, transparent or non-transparent. In this embodiment, the substrate 110 is a transparent glass.

The plurality of row electrode leads 120 are spaced apart from each other, the plurality of row electrode leads 130 are spaced apart from each other, and the plurality of row electrode leads 120 and the plurality of column electrode leads 130 are disposed to cross each other, and the plurality of insulators 140 are sandwiched therebetween to realize row electrode leads The insulation between 120 and column electrode lead 130. Each adjacent two row electrode leads 120 and two adjacent column electrode leads 130 lead form a grid for accommodating the incandescent light source 150, and each grid is correspondingly provided with an incandescent light source 150. In each of the grids, the incandescent light source 150 is electrically coupled to the row electrode lead 120 and the column electrode lead 130, respectively, to provide the voltage or current required for its illumination. It can be understood that the size of the grid can be set according to the resolution requirements of the incandescent light source display device 100. In this embodiment, each grid is provided with an incandescent light source 150. The plurality of row electrode leads 120 are parallel to each other and the spacing between adjacent two row electrode leads 120 is equal, the plurality of column electrode leads 130 are parallel to each other and the spacing between adjacent two column electrode leads 130 is equal, and the row electrode leads 120 are equal to each other. It is disposed perpendicular to the column electrode lead 130. The row of electrode leads 120 extends along the axial direction of the column electrode lead 130 to form a first electrode 121. The column electrode lead 130 extends along the axial direction of the row electrode lead 120 to form a second electrode 131, and is arranged in the same The first electrodes 121 in the row grid are electrically connected to the same row electrode lead 120, and the second electrodes 131 arranged in the same column grid are electrically connected to the same column electrode lead 130. A gap is formed between the first electrode 121 and the second electrode 131. The incandescent light source 150 is received in the gap, and passes through the first electrode 121 and the second electrode 131 and the row electrode lead 120 and the column electrode lead respectively. 130 electrical connections. In this embodiment, the thickness of the first electrode 121 and the second electrode 131 on the surface of the substrate 110 may be greater than the thickness of the electrode lead 120 and the column electrode lead 130, and the thickness is not less than 1 micrometer. Of course, the thickness of the first electrode 121 and the second electrode 131 on the surface of the substrate 110 may also be equal to The thickness of the electrode lead 120 and the column electrode lead 130. At this time, the first electrode 121 can be integrally formed with the row electrode lead 120, and the second electrode 131 can be integrally formed with the column electrode lead 130.

The fixing component 160 can be disposed on the surface of the first electrode 121 and the second electrode 131 by screen printing, and the incandescent light source 150 is clamped therein, so that the incandescent light source 150 is firmly fixed to the fixing component 160 and the first Between the electrode 121 or the second electrode 131.

The incandescent light source display device 100 further includes a housing (not shown), and an enclosed space is formed in the housing to receive the incandescent light source 150. The enclosed space is vacuum or contains an inert gas. As will be understood by those skilled in the art, The housing may form the enclosed space and accommodate the incandescent light source 150 by existing vacuum packaging techniques. Preferably, the vacuum packaging technique is a tubeless packaging technique.

The plurality of incandescent light sources 150 are disposed in the plurality of grids and spaced apart from the substrate 110. Preferably, the distance between the incandescent light source 150 and the substrate 110 is greater than or equal to 1 micrometer, and the spacing distance can be set by the first electrode 121. And controlling the thickness of the second electrode 131 on the surface of the substrate 110.

The incandescent light source 150 in each grid corresponds to one pixel unit of the incandescent light source display device 100. The incandescent light source 150 has a heat capacity per unit area of less than 2 x 10 ^-4 joules per square centimeter Kelvin. Preferably, the incandescent light source 150 has a heat capacity per unit area of less than 1.7 x 10 ^-6 joules per square centimeter Kelvin. The incandescent light source 150 comprises a carbon nanotube structure, the self-supporting structure, the so-called "self-supporting structure", that is, the carbon nanotube structure does not need to be supported by a support body, and can maintain its own specific shape. In the carbon nanotube structure of the self-supporting structure, a plurality of carbon nanotubes are attracted to each other by van der Waals force, so that the carbon nanotube structure has a specific shape.

The carbon nanotube structure includes at least a plurality of carbon nanotubes extending along the first electrode 121 toward the second electrode 131. Specifically, the carbon nanotube structure includes at least one carbon nanotube film, at least one nanocarbon line structure, or a combination thereof. Specifically, the carbon nanotube structure may include a single-layer carbon nanotube film or a structure formed by laminating a plurality of layers of carbon nanotube film, and may include a single nano carbon line structure or a plurality of nano carbon line structure. The structure formed by the cross arrangement, the parallel arrangement or the weaving may further include a structure formed by a nano carbon line structure disposed on the surface of the carbon nanotube film. The carbon nanotube structure can also be combined with a plurality of filler materials to form a carbon nanotube composite structure. The filler material in the carbon nanotube composite structure may be composited on the surface of the carbon nanotube structure or filled in the gap inside the carbon nanotube structure. The filler material is a material having good conductivity and heat resistance such as platinum, tungsten or gold.

Referring to FIG. 4, the carbon nanotube film is a film structure having a mass density of less than 3×10 ^-4 kg per square meter. Preferably, the carbon nanotube film comprises at least one carbon nanotube film, and the carbon nanotube film can be obtained by directly drawing from a carbon nanotube array by using a stretching tool, and the mass density is less than 1.5×10 ^-5 kg per square meter, and most of the carbon nanotubes in the carbon nanotube film are connected end to end by van der Waals force, preferably, most of the nanoparticles in the carbon nanotube film The carbon tube extends along the first electrode 121 toward the second electrode 131. For the structure of the carbon nanotube film and the preparation method thereof, please refer to Taiwan Patent Application No. 096105016, which was filed on Feb. 12, 2008, to the same. In order to save space, only the above is cited, but all the technical disclosures of the above application are also considered as part of the technical disclosure of the present application. When the film-like structure is composed of a laminate of a plurality of layers of carbon nanotubes, the thickness thereof is not more than 10 μm.

The nanocarbon line-like structure comprises at least one nano carbon line, and the nano carbon line structure has a wire diameter of no more than 10 microns. The nano carbon pipeline includes a plurality of carbon nanotubes along the carbon nanotube A carbon nanotube that extends or rotates in the axial direction of the wire. The nanocarbon pipeline-like structure may be a bundle structure composed of a plurality of nano carbon pipelines side by side, or a twisted wire structure composed of mutually twisted. In addition, the carbon nanotube structure may be composed of a plurality of the carbon carbon line-like structures arranged in parallel, intertwined or interwoven. Preferably, the nanocarbon line is obtained by mechanically twisting or organic solvent treatment of an ordered carbon nanotube film. The non-twisted nanocarbon pipeline obtained by the organic solvent treatment comprises a plurality of carbon nanotubes arranged along the length direction of the nanocarbon pipeline and connected end to end. The nanocarbon pipeline obtained by the organic solvent treatment and the preparation method thereof can be found in the Taiwan Patent Application No. 094144790, which was filed on Jan. 16, 2005, to the same. In order to save space, only the above is cited, but all the technical disclosures of the above application are also considered as part of the technical disclosure of the present application.

Referring to FIG. 5 and FIG. 6 , in the embodiment, the incandescent light source 150 is a single-layer carbon nanotube film, and the thickness thereof is between 1 nm and 100 nm. When the incandescent light source display device 100 is in operation, both the row electrode lead 120 and the column electrode lead 130 are electrically connected to a driving circuit, and each of the incandescent light sources 150 corresponds to one row of electrode leads 120 and one column of electrode leads 130. When a moving image is to be displayed, the first image is taken first, and the row electrode lead 120 and the column electrode lead 130 of the incandescent light source 150 required to form the first image are calculated. The driving circuit sends a row of electrode lead 120 selection pulses, selects the first row electrode lead 120, and emits a column of electrode lead 130 scanning pulses, scans the column electrode lead 130, and drives the selected row electrode lead 120 to emit light. The incandescent light source 150 emits light; then emits a second row electrode lead 120 selection pulse and another column electrode lead 130 scan pulse to drive the incandescent light source 150 on the row electrode lead 120 that needs to emit light; thus looping, for each row of electrodes The leads 120 are all selected once to complete a display period. Since the time interval between the selection pulse of each row electrode lead 120 is short, the human vision cannot be separated, so that the viewer can simultaneously view The first image was observed. Then, the next image in the motion picture is taken out for display. It can be understood that when the first image is displayed, the time difference between the incandescent light sources 150 between the different row electrode leads 120 needs to be short enough for the viewer to view the complete image; and when the second image needs to be displayed When the incandescent light source 150 in the first image is displayed, it must be extinguished in time, so as not to interfere with the display of the second image, and no "tailing" phenomenon occurs.

Since the carbon nanotube structure has the characteristics of small heat capacity per unit area, large specific surface area, and thermal emissivity, the carbon nanotube structure can be driven by a heating pulse to obtain a very short response time, so that it can be successfully displayed. Motion picture. Please refer to FIG. 7 , which is a response time diagram of a 2 mm×8 mm carbon nanotube film. The heat capacity per unit area of the carbon nanotube film is less than 1.7×10 ^-6 joules per square centimeter Kelvin. It is a current pulse with a time width of 6 milliseconds and an intensity of 103 milliamps. As can be seen from the figure, the carbon nanotube film is driven by the heating pulse, and the time from the start to the lighting is only 0.8 milliseconds, and the time from the stop of heating to the extinction is only 0.7 milliseconds. Far shorter than the pixel response time of the liquid crystal display device. Such a short response time mainly depends on the heat capacity per unit area of the carbon nanotube film of less than 1.7×10 ^-6 joules per square centimeter Kelvin. It can be understood that the response time is the heat capacity per unit area of the incandescent light source 150. When it increases, the heat capacity per unit area of the incandescent light source 150 reaches 2×10 ⁻⁴ joules per square centimeter Kelvin, and the response time also reaches 40 milliseconds or more.

In this embodiment, a 16×16 pixel array is prepared by using the single-layer carbon nanotube film, which is operated under vacuum or inert gas, and the area of each carbon nanotube film is 100 μm×300 μm. Referring to Figures 8 and 9, the brightness of a single carbon nanotube film increases exponentially with increasing drive power. When the power is 0.08 watts, the brightness is 6400 cd/m2, which is the carbon nanometer. Tube film preparation 16×16 pixel array The total power consumption of the column is about 1 watt, the power consumption is low, and the brightness is large. The carbon nanotube film is driven by a current of 11.5 mA, and it can stably emit light at 1740 K. The luminance of the carbon nanotube is 530 cd/m2, and the required driving current is relatively small. Because its driving power consumption and driving current are relatively low, its driving voltage is also very low. The minimum driving voltage of the carbon nanotube film can reach 1 volt, which is beneficial to the design of the corresponding driving circuit.

The incandescent light source display device uses an incandescent light source including a carbon nanotube structure as a pixel point, has a very short response time, can successfully display a dynamic image, and enables an incandescent light source to be successfully applied to a display field to display a dynamic image. Moreover, the incandescent light source display device has low power consumption, high brightness, and low driving current. Compared with the relatively conventional cold cathode tube display device, the incandescent light source display device does not require phosphorescence excitation, does not require a fluorescent layer, and has a very simple structure. Compared with the conventional liquid crystal display device, the incandescent light source display device has no viewing angle limitation. In addition, since the size of the carbon nanotube structure itself is small, an incandescent light source display device using a carbon nanotube structure as a light source can realize high-resolution display.

Referring to FIG. 10, an embodiment of the present invention provides a method for fabricating an incandescent light source display device, which includes the following steps.

Step S101: providing a substrate. The substrate is an insulating substrate such as a ceramic insulating substrate, a glass insulating substrate, a resin insulating substrate, a quartz insulating substrate, or the like. The size and thickness of the substrate are not limited, and those skilled in the art can select according to actual needs. In this embodiment, the substrate is preferably a glass substrate.

Step S102: forming a plurality of spaced-apart row electrode leads on the surface of the substrate.

Step S103: forming a plurality of spaced-apart column electrode leads on the surface of the substrate, and the The plurality of row electrode leads and the plurality of column electrode leads are disposed to intersect each other to form a network, and each of the two adjacent row electrode leads intersects with each of the two adjacent column electrode leads crossing the same to form a grid, and the plurality of row electrode leads The column electrode leads are insulated from each other. The row electrode lead and the column electrode lead are provided on the substrate by a screen printing method, a sputtering method, or a vapor deposition method. Specifically, in the preparation process, the plurality of row electrode leads and the plurality of column electrode leads are disposed to cross each other, and at the same time, it is necessary to ensure electrical insulation between the row electrode leads and the column electrode leads to form an addressable circuit, so as to be different from the row electrode leads and An addressable voltage is applied between the column electrode leads. In this embodiment, the row electrode leads further extend a first electrode along the axial direction of the column electrode lead, and the column electrode lead further extends a second electrode along the axial direction of the row electrode lead, the first There is a gap between the electrode and the second electrode for accommodating the carbon nanotube structure. The plurality of row electrode leads, the plurality of first electrodes, the plurality of column electrode leads and the plurality of second electrodes are prepared by screen printing, and the method comprises the following steps: first, printing multiple parallel and equal intervals on the substrate by screen printing The row electrode lead and the first electrode are arranged. Next, a plurality of insulators are printed by screen printing at the intersection of the row electrode leads and the column electrode leads to be formed. Finally, a plurality of parallel and equally spaced column electrode leads and a second electrode are printed on the substrate by screen printing, and the plurality of row electrode leads and the plurality of column electrode leads cross each other to form a complex grid. In this embodiment, the material for preparing the row electrode lead, the first electrode, the column electrode lead, and the second electrode by a screen printing method is a conductive paste. The composition of the conductive paste includes metal powder, low melting point glass powder and a binder. Among them, the metal powder is preferably silver powder, and the binder is preferably terpineol or ethyl cellulose. In the conductive paste, the weight ratio of the metal powder is 50% to 90%, the weight ratio of the low melting point glass powder is 2% to 10%, and the weight ratio of the binder is 10% to 40%.

Step S104: forming a plurality of first electrodes and second electrodes on the surface of the substrate, and forming a first electrode and a second electrode at intervals in each of the grids.

Step S105: providing a carbon nanotube structure covering the substrate and electrically contacting the first electrode and the second electrode, wherein the carbon nanotube structure extends substantially along the first electrode toward the second electrode. In this embodiment, the method further includes the steps of: preparing at least one carbon nanotube structure; laying the at least one carbon nanotube structure directly along the direction in which the first electrode extends toward the second electrode, and disposed on the electrode and the electrode lead On the insulating substrate, a carbon nanotube film structure is formed, and a majority of the carbon nanotubes in the carbon nanotube structure extend substantially from the first electrode to the second electrode. It can be understood that, when laying, the carbon nanotube structure can be directly covered on the substrate, and directly adhered to the first electrode and the second electrode surface by its own adhesiveness. Since the carbon nanotube structure itself has good electrical conductivity, it can be directly connected to the first electrode and the second electrode to achieve electrical connection. When the carbon nanotube structure is a single-layer carbon nanotube film, the arrangement of the carbon nanotubes of the carbon nanotube film is substantially the same, and the nanometer in the carbon nanotube film is ensured during laying. The carbon tubes extend from the first electrode to the second electrode in substantially the same direction. And in order to fix the carbon nanotube film more firmly on the first electrode and the second electrode, and more effectively connect with the first electrode and the second electric contact, at least one carbon nanotube film is laid and covered. A layer of conductive paste may also be applied to the first electrode and the second electrode before the entire substrate. Or include the steps of forming a fixing member on the row electrode lead and the column electrode lead. Therefore, the carbon nanotube structure is more firmly bonded to the row electrode lead and the column electrode lead. It can be understood that the fixing element can be formed by a screen printing method, a sputtering method or an evaporation method.

Step S106: cutting the carbon nanotube structure to break the carbon nanotube structure in different grids. Specifically, a laser source and a mirror can be used, and the mirror reflects the laser light emitted from the laser source to the carbon nanotube structure on the substrate, and cuts the carbon nanotube structure to adjust the mirror. From the angle, the laser can be adjusted to the position where the carbon nanotube structure is cut. The method of cutting the carbon nanotube structure is laser ablation , electron beam scanning or heat blowing. In this embodiment, the laser ablation method is preferably used to cut the carbon nanotube structure, and specifically includes the following steps: First, a laser beam with a certain width is scanned along each row electrode lead to remove between the second electrodes of different rows. The carbon nanotube structure; secondly, a laser beam of a certain width is scanned along each column electrode lead to remove the carbon nanotube structure between the column electrode lead and the adjacent first electrode. It can be understood that the above method of cutting the carbon nanotube structure by laser ablation can also be realized by multiple scanning of a narrow laser beam.

The preparation method of the incandescent light source display device has fewer steps, the process is relatively simple, and the cost is low.

The incandescent light source display device directly displays an image by using an incandescent light source including a carbon nanotube structure, and the incandescent light source display device can display a dynamic image by using the carbon nanotube structure with a very short response time.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧incandescent light source display device

110‧‧‧Substrate

120‧‧‧ row electrode lead

121‧‧‧First electrode

130‧‧‧ column electrode lead

131‧‧‧second electrode

140‧‧‧Insulator

150‧‧‧incandescent light source

Claims (22)

An incandescent light source display device is improved in that the incandescent light source display device comprises: a plurality of spaced row electrode leads and a plurality of spaced column electrode leads, wherein the plurality of row electrode leads and the plurality of column electrode leads are arranged to cross each other, each adjacent The two row electrode leads form a grid with the adjacent two column electrode leads intersecting therewith, and the row electrode leads are electrically insulated from the column electrode leads; and the plurality of incandescent light sources, each grid is correspondingly provided with an incandescent light source, Each incandescent light source comprises a carbon nanotube structure electrically connected to a row electrode lead and a column electrode lead corresponding to the grid, wherein the carbon nanotube structure has a heat capacity per unit area of less than 2× 10 ^-4 joules per square centimeter Kelvin. The incandescent light source display device of claim 1, wherein the carbon nanotube structure is a self-supporting structure. The incandescent light source display device of claim 1, wherein the carbon nanotube structure comprises at least one carbon nanotube film, at least one nano carbon line structure, or a combination thereof. The incandescent light source display device according to claim 3, wherein the carbon nanotube film has a mass density of less than 3 × 10 ^-4 kg per square meter. The incandescent light source display device of claim 3, wherein the carbon nanotube film comprises a plurality of carbon nanotubes connected end to end and arranged substantially in the same direction. The incandescent light source display device of claim 5, wherein the carbon nanotube structure comprises a plurality of carbon nanotube film stacked or arranged side by side. The incandescent light source display device of claim 5, wherein the carbon nanotube film in the carbon nanotube film of each of the incandescent light sources extends from the row electrode lead to the column electrode lead in substantially the same direction. The incandescent light source display device according to claim 5, wherein the carbon nanotube film has a mass density of ^-5 kg per square meter and a heat capacity per unit area of 1.7 x 10 ^-6 joules per square centimeter Kelvin. The incandescent light source display device according to claim 1, wherein the carbon nanotube structure comprises a plurality of nano carbon line-like structures arranged in parallel with each other, arranged side by side, interdigitated or woven into a mesh structure. The incandescent light source display device of claim 1, wherein the incandescent light source is a carbon nanotube composite structure formed by a carbon nanotube structure, and the carbon nanotube composite structure comprises a carbon nanotube structure and a filling material, The filler material is composited in the surface or internal gap of the carbon nanotube structure. The incandescent light source display device of claim 1 or 10, wherein the carbon nanotube structure or the carbon nanotube composite structure is at least partially suspended. The incandescent light source display device of claim 1, wherein the plurality of row electrode leads and the plurality of column electrode leads are respectively disposed parallel to each other and equally spaced, and the plurality of row electrode leads and the plurality of column electrode leads are perpendicular to each other. An incandescent light source display device is improved in that the incandescent light source display device comprises: a substrate; a plurality of parallel spaced row electrode leads and a plurality of parallel spaced column electrode leads disposed on the substrate surface, the plurality of row electrode leads and the plurality of columns The electrode leads are perpendicularly disposed to each other, the plurality of row electrode leads are electrically insulated from the plurality of column electrode leads, and each adjacent two row electrode leads forms a grid with the adjacent two column electrode leads; and a plurality of incandescent light sources, each The grid corresponds to an incandescent light source, each grid corresponding to a pixel unit, each incandescent light source comprising a first electrode, a second electrode and a carbon nanotube structure, the carbon nanotube structure is set at the first The electrode and the second electrode are electrically connected to the first electrode and the second electrode, and the first electrode and the second electrode are electrically connected to the column electrode lead and the row electrode lead respectively, and the heat capacity per unit area of the carbon nanotube structure Less than 2 × 10 ^-4 joules per square centimeter Kelvin. The incandescent light source display device of claim 13, wherein the material of the substrate comprises glass, Quartz, polymer or ceramic. The incandescent light source display device of claim 13, wherein the first electrode is integrally formed with the column electrode lead, and the second electrode is integrally formed with the row electrode lead. The incandescent light source display device of claim 13, wherein the incandescent light source display device further comprises a plurality of fixing elements respectively corresponding to the first electrode and the second electrode, wherein the two ends of the carbon nanotube structure are respectively fixedly disposed An electrode, between the second electrode and the fixing element. The incandescent light source display device of claim 13, wherein the carbon nanotube structure is at least partially suspended, and the distance between the suspended carbon nanotube structure and the substrate is greater than 10 micrometers. The incandescent light source display device of claim 13, further comprising a casing, the casing being formed with a closed space for accommodating the incandescent light source, the enclosed space being vacuum or containing an inert gas. A method for preparing an incandescent light source display device, comprising the steps of: providing a substrate; forming a plurality of spaced row electrode leads on the substrate surface; forming a plurality of spaced column electrode leads on the substrate surface, and the plurality of row electrode leads And the plurality of column electrode leads are arranged to intersect each other to form a network, and each of the two adjacent row electrode leads intersects with each of the two adjacent column electrode leads crossing the same to form a grid, and the plurality of row electrode leads and the column electrode leads Insulating each other; forming a plurality of first electrodes and second electrodes on the surface of the substrate, forming a first electrode and a second electrode in each of the grids; providing a carbon nanotube structure covering the substrate and the first electrode Electrically contacting the second electrode, wherein the carbon nanotube tube extends substantially along the first electrode toward the second electrode; cutting the carbon nanotube structure to disconnect the carbon nanotube structure in different grids . The method for preparing an incandescent light source display device according to claim 19, wherein the method of cutting the carbon nanotube structure comprises a laser ablation method, an electron beam scanning method or a heat blowing method. The method for preparing an incandescent light source display device according to claim 19, wherein the cutting method of the carbon nanotube structure comprises the following steps: first, scanning with a laser beam of a certain width along each row electrode lead to remove a carbon nanotube structure between the second electrodes of different rows; secondly, a laser beam of a certain width is scanned along each column electrode lead to remove the carbon nanotube between the column electrode lead and the adjacent first electrode structure. An incandescent light source display device is characterized in that: the incandescent light source display device comprises: a plurality of spaced row electrode leads and a plurality of spaced column electrode leads, wherein the plurality of row electrode leads and the plurality of column electrode leads are arranged to cross each other to form a plurality Grid, the row electrode lead and the column electrode lead are electrically insulated; and the plurality of incandescent light sources are arranged in one-to-one correspondence with the plurality of grids, each incandescent light source corresponds to one pixel unit, and includes a carbon nanotube structure The cell electrode lead and the column electrode lead of the corresponding grid are electrically connected, and the carbon nanotube structure has a heat capacity per unit area of less than 2×10 ⁻⁴ joules per square centimeter Kelvin.