Source: http://www.google.com/patents/US20040135931?dq=inassignee:doubleclick
Timestamp: 2016-02-10 13:55:28
Document Index: 559174478

Matched Legal Cases: ['art. 4', 'art. 5', 'art. 6', 'art. 7', 'art. 8', 'art 103', 'art 110', 'art 104', 'art 103']

Patent US20040135931 - Liquid crystal display apparatus containing image sensor and process for ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA liquid crystal display apparatus containing an image sensor, which comprises a liquid crystal display part comprising an active matrix circuit, a peripheral driver circuit for driving the active matrix circuit, and a sensor part, integrated on one substrate, wherein the sensor part is sealed and protected...http://www.google.com/patents/US20040135931?utm_source=gb-gplus-sharePatent US20040135931 - Liquid crystal display apparatus containing image sensor and process for producing the sameAdvanced Patent SearchPublication numberUS20040135931 A1Publication typeApplicationApplication numberUS 10/743,482Publication dateJul 15, 2004Filing dateDec 22, 2003Priority dateSep 2, 1997Also published asUS6496240, US6680764, US6937306, US7158199, US7528912, US7817232, US8031307, US20030052850, US20050206830, US20070153177, US20090231527, US20110032462Publication number10743482, 743482, US 2004/0135931 A1, US 2004/135931 A1, US 20040135931 A1, US 20040135931A1, US 2004135931 A1, US 2004135931A1, US-A1-20040135931, US-A1-2004135931, US2004/0135931A1, US2004/135931A1, US20040135931 A1, US20040135931A1, US2004135931 A1, US2004135931A1InventorsHongyong Zhang, Masayuki SakakuraOriginal AssigneeSemiconductor Energy Laboratory Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (18), Classifications (23), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetLiquid crystal display apparatus containing image sensor and process for producing the same
US 20040135931 A1Abstract
What is claimed is: 1. A liquid crystal display apparatus containing an image sensor, which comprises a liquid crystal display part comprising an active matrix circuit, a peripheral driver circuit for driving said active matrix circuit, and a sensor part, integrated on one substrate, wherein said sensor part has a sealed space sealed by a sealing part and a counter substrate. 2. An apparatus according to claim 1, wherein an inert gas is filled in said sealed space. 3. A liquid crystal display apparatus containing an image sensor, which comprises a liquid crystal display part comprising an active matrix circuit, a peripheral driver circuit for driving said active matrix circuit, and a sensor part, integrated on one substrate, wherein said sensor part is surrounded by at least one sealing part, and a sealing part provided between said liquid crystal display part and said sensor part seals said liquid crystal and protects said sensor part. 4. A liquid crystal display apparatus containing an image sensor, which comprises a liquid crystal display part comprising an active matrix circuit, a peripheral driver circuit for driving said active matrix circuit, and a sensor part, integrated on one substrate, wherein a spacer is not present in said sensor part. 5. A liquid crystal display apparatus containing an image sensor, which comprises a liquid crystal display part comprising an active matrix circuit, a peripheral driver circuit for driving said active matrix circuit, and a sensor part, integrated on one substrate, wherein a color filter formed on a counter substrate of said sensor part has a cell size that is smaller than that formed on a counter substrate of said display part. 6. A liquid crystal display apparatus containing an image sensor, which comprises a liquid crystal display part comprising an active matrix circuit, a peripheral driver circuit for driving said active matrix circuit, and a sensor part, integrated on one substrate, wherein the thickness d1 of a counter substrate of said sensor part is smaller than the thickness d2 of a counter substrate of said liquid crystal display part. 7. A liquid crystal display apparatus containing an image sensor, which comprises a liquid crystal display part comprising an active matrix circuit, a peripheral driver circuit for driving said active matrix circuit, and a sensor part, integrated on one substrate, wherein the line width of a sealing part surrounding said sensor part is smaller than the line width of a sealing part surrounding said liquid crystal display part. 8. A liquid crystal display apparatus containing an image sensor, which comprises a liquid crystal display part comprising an active matrix circuit, a peripheral driver circuit for driving said active matrix circuit, and a sensor part, integrated on one substrate, wherein a counter substrate of said liquid crystal display part is maintained at a constant substrate distance by a sealing part and a spacer, and a counter substrate of said sensor part is in close contact with said substrate by an adhesive. 9. A process for producing a liquid crystal display apparatus containing an image sensor, which comprises a liquid crystal display part comprising an active matrix circuit, a peripheral driver circuit for driving said active matrix circuit, and a sensor part, integrated on one substrate, said process comprising in this order a step of adhering a counter substrate of said liquid crystal display part, a step of cutting said counter substrate of said liquid crystal display part, and a step of adhering a counter substrate of said sensor part. Description
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0052] The invention is described in more detail with reference to the following examples, but the invention is not construed as being limited thereto. EXAMPLE 1 [0053] The production process of the panel is described by referring to FIGS. 3A to 3C. The completion drawing is shown in FIGS. 4A, 4B and 1B. [0054] An element substrate 301 is prepared. [0055] In this Example, the element substrate 301 is a substrate shown in FIG. 3A having an active matrix circuit and a peripheral circuit each comprising a TFT part, and a sensor part. The element substrate is not limited if it has a pixel region and a peripheral circuit each comprising TFT elements. [0056] The sensor part comprises a photoelectric conversion layer 352 and a photoelectric conversion element. [0057] The sensor part is formed simultaneously with the formation of the thin film transistors constituting the active matrix circuit and the peripheral circuit. [0058] An oriented film (not shown in Figure) for the orientation of the liquid crystal is coated on the element substrate and a counter substrate, and then baked, followed by subjecting to a rubbing treatment. [0059] A seal pattern and a dummy seal part are provided on the element substrate with a sealing material 305 by using a seal printing machine or a seal dispenser, as shown in FIG. 3B. In this Example, while the seal pattern is provided on the element substrate, a step where the seal pattern is provided on the counter substrate may be employed. [0060] As the constitution of each of the panels, the sealing part 103 is arranged to surround the display part 110 and the peripheral driver circuit region 111. The sensor part is arranged to be surrounded by the sealing part 104. [0061] A seal opening 107 is provided at least a part of the sealing part 103 of the each of the panels, so as to be capable of injecting a liquid crystal material from the opening to the inside of the sealing part. [0062] A solution of an epoxy resin and a phenol hardening agent dissolved in a ethyl cellosolve is used as the material for the sealing part in this Example, but it is not particularly limited if it is a resin for sealing having an ultraviolet setting property or a thermosetting property. [0063] Spacers 306 for maintaining the distance between the substrates are scattered selectively on the display part. Spherical bodies having a diameter of 5 μm comprising a polymer series material, a glass series material or a silica series material are used as the spacer. [0064] The counter substrate 302 is prepared. [0065] The counter substrate 302 is a substrate provided to be arranged as facing the element substrate, on which a counter electrode and a color filter are provided. [0066] The element substrate provided by the above-described steps and the counter substrate are superimposed and adhered by heat press, as shown in FIG. 3C. [0067] An injection inlet for a liquid crystal material is provided by a cutting step using a scriber and a breaker, in such a manner that one or more of the inlet is provided on a side where both of the edges of the pair of panels are matched. [0068] Since a leader line of wiring is provided in this Example, the side where the leader line is provided is also cut by a scriber. [0069] A step of injecting the liquid crystal material 310 into the inside of the panels constituting the liquid crystal apparatus is conducted by a vacuum injection method. The vacuum injection method is an injection method for a liquid crystal material utilizing capillarity and difference in pressure. [0070] The liquid crystal material 310 is injected by the vacuum injection method onto the pixel region and the peripheral driver circuit region inside the sealing part of the panel through the injection inlet. [0071] As the liquid crystal material, a nematic liquid crystal, a smectic liquid crystal, a cholesteric liquid crystal and other various liquid crystals may be used. A nematic liquid crystal is used in this Example. [0072] A pressure is applied to the panels from the both sides thereof to expel an excessive amount of the liquid crystal material, and with maintaining the applied pressure, a sealing resin 118 of ultraviolet setting type or thermosetting type is coated on the injection inlet, followed by removing the pressure. Thus, the sealing resin is slightly drawn into the inside of the injection inlet. The sealing resin is hardened in this state to seal the injection inlet, as shown in FIG. 3D. [0073] A panel comprising a pair of substrates sandwiching a liquid crystal as shown in FIGS. 1B, 4A and 4B is obtained by the above-described procedures. Polarizers are attached on both sides of the panel, and wiring electrically connecting to the outside is provided, to complete the liquid crystal display apparatus. [0074] An optical system is attached to the sensor part, to complete the liquid crystal display apparatus containing an image sensor. EXAMPLE 2 [0075] In this Example, the case where the counter substrate of the sensor part and the counter substrate of the display part are separated from each other is exemplified. [0076] The basic constitution of this Example is the same as that produced in Example 1, and therefore the description is made noting the differences. [0077] In the final structure of this Example shown in FIG. 6A, the display part and the sensor part are formed on one substrate 501, but the counter substrate 502 of the display part and the counter substrate 503 of the sensor part are separated from each other. [0078] In this case, the cell size of the color filter of the sensor-part is required to be smaller than the cell size of the color filter of the liquid crystal display part. [0079] Therefore, it is preferred that the cell size of the counter substrate of the sensor part and the cell size of the counter substrate of the liquid crystal display part are different from each other. The production method thereof may be either a method where a counter substrate on which color filters having different cell sizes are formed on one substrate is used, or a method where the counter substrate of the sensor part and the counter substrate of the display part are separately adhered. EXAMPLE 3 [0080] In this Example, the case where a substrate thinner than the counter substrate of the display part is used as the counter substrate of the sensor part is exemplified. [0081] The basic constitution of this Example is the same as that produced in Example 2, and therefore the description is made noting the differences. [0082] The constitution of this Example is shown in FIG. 6C. [0083] The thickness of the counter substrate of the sensor part of this Example is smaller than the counter substrate of the liquid crystal display part and is from 0.1 to 2.0 mm, preferably from 0.1 to 1.0 mm. The line width of the sealing part surrounding the sensor part is smaller than the line width of the sealing part surrounding the liquid crystal display part (from 1 to 1.3 mm). [0084] The thinner counter substrate of the sensor part in this Example is not limited to a glass substrate if it is a colorless transparent substrate or a film transmitting light. [0085] By employing such a constitution, the influence on the optical system attached to the sensor part can be reduced. The thinner the thickness of the counter substrate of the sensor part is, the less the light is refracted, and thus the intensity of light can be maintained to obtain a liquid crystal display panel at low cost, in which the sensor part that has a small pixel area and can incorporate an image with good quality is formed on the same substrate as the liquid crystal display part. [0086] By making the line width of the sealing part surrounding the sensor part smaller than the line width of the sealing part surrounding the liquid crystal display part, the distance between the substrate of the sensor part and that of the liquid crystal display part are differentiated. EXAMPLE 4 [0087] In this Example, the case where the counter substrate of the sensor part and the counter substrate of the display part are in close contact with each other by using an adhesive is exemplified. [0088] The basic constitution of this Example is the same as that produced in Example 2, and therefore the description is made noting the differences. [0089] The constitution of this Example is shown in FIGS. 5B and 6D. [0090] By employing such a constitution, the sensor part can be completely isolated from the external atmosphere, and deterioration due to contact with the external atmosphere can be prevented. The distance between the sensor part and the counter substrate of the sensor part is from 0 to 5 μm, preferably 4 μm or less, and it is ideal that the counter substrate and the element substrate are in completely close contact with each other. EXAMPLE 5 [0091] In this Example, an electronic apparatus utilizing the liquid crystal panel according to the invention is exemplified in FIG. 7. The electronic apparatus is a product carrying the liquid crystal panel containing an image sensor. [0092] [0092]FIG. 7 shows a notebook personal computer, in which the invention can be applied to a liquid crystal display having an image sensor integrated therein. [0093] In the invention, because the image sensor is provided on the same substrate as the pixel matrix and the peripheral driver circuit, miniaturization and weight saving of the display apparatus having a display function and an image pickup function can be realized. Furthermore, because the sensor part and the display part are simultaneously formed, the display apparatus can be provided at low cost. [0094] By employing the constitution of the invention, the inclusion of the liquid crystal into the sensor part on the injection step of the liquid crystal is prevented, and after the adhesion step, the sensor part is protected from the liquid crystal, dusts and an external impacts. Thus, a durable liquid crystal display apparatus containing an image sensor, in which the sensor part is well operated, can be obtained. [0095] Furthermore, when the optical system is attached to the sensor part, the optical system can be sufficiently fixed, and the distance between the optical system and the sensor part can be maintained at a constant value by the sealing part and the counter substrate. Thus, an image of good quality with a stable focal distance can be obtained. 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