WO2010084639A1 - 液晶表示装置 - Google Patents
液晶表示装置 Download PDFInfo
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- WO2010084639A1 WO2010084639A1 PCT/JP2009/065108 JP2009065108W WO2010084639A1 WO 2010084639 A1 WO2010084639 A1 WO 2010084639A1 JP 2009065108 W JP2009065108 W JP 2009065108W WO 2010084639 A1 WO2010084639 A1 WO 2010084639A1
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- sensor
- liquid crystal
- light
- display device
- crystal display
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
- G02F1/13318—Circuits comprising a photodetector
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/11—Function characteristic involving infrared radiation
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/21—Thermal instability, i.e. DC drift, of an optical modulator; Arrangements or methods for the reduction thereof
Definitions
- the present invention relates to a liquid crystal display device having an area sensor function that incorporates an optical sensor element and detects an input position from the outside.
- Some display devices such as liquid crystal display devices are equipped with a touch panel (area sensor) function that can detect the touched position when the panel surface is touched with an input pen or a human finger. Display devices have been developed.
- the conventional touch panel integrated display device has a resistance film method (a method in which an input position is detected by contact between an upper conductive substrate and a lower conductive substrate when pressed), and a capacitance type (a touched place).
- the method of detecting the input position by detecting the change in capacitance of the mainstream) is the mainstream.
- an area sensor function (specifically, a scanner function, a touch panel function, etc.) can be realized by a normal display device. That is, when the optical sensor element functions as an area sensor, a touch panel (or scanner) integrated display device can be realized.
- display devices such as the above-mentioned liquid crystal display devices increase the surface temperature of the display device due to factors such as the usage environment, affect the electrical characteristics of internal circuit elements, and cause problems such as image quality degradation. There is a case.
- Patent Document 1 describes a configuration in which a temperature detection unit is provided in a liquid crystal display device, and a frequency modulation circuit that modulates the driving frequency of the liquid crystal display device according to the temperature detected by the temperature detection unit is described. Yes.
- FIG. 13 is a diagram showing a relationship between a change in environmental temperature in an environment where no light is present and a change in the current value flowing through the photosensor element.
- the current value flowing when the ambient temperature is 40 degrees (the point A in the figure) flowing when the ambient temperature is 30 degrees (point A).
- the point B in the figure is high.
- the value of the current flowing through the photosensor element also increases, so that it becomes difficult to derive a current value corresponding to only the amount of received light.
- the photosensor element is generally provided with a photosensor element for dark current compensation as a correction sensor for compensating the detected current value of the photosensor that varies with temperature.
- temperature compensation can be performed on the optical sensor element.
- a light blocking film for blocking light entering from outside is provided.
- a black matrix made of carbon black provided on the color filter substrate side is generally used as the light blocking film.
- the light blocking film made of carbon black provided in the photosensor element for dark current compensation partially transmits light in the infrared region, the influence of light cannot be completely eliminated, It is difficult to detect a current value that changes purely under the influence of temperature.
- FIG. 14 is a graph showing the transmittance of each carbon black for each wavelength of light.
- the actual environmental temperature is 30 ° C.
- the light blocking film provided on the dark current compensating photosensor completely absorbs light in the infrared region.
- the value of the current flowing through the dark current compensating photosensor is a value corresponding to the point A in the figure. Instead, the value corresponds to point C in the figure.
- the value corresponding to the point C in the figure is equal to the current value (point B in the figure) that flows when the environmental temperature is 40 degrees. This optical sensor recognizes the ambient temperature as 40 degrees.
- the present invention has been made in view of the above-described problems, and an object of the present invention is to realize a liquid crystal display device including an area sensor that can obtain high detection accuracy without being affected by the use environment temperature.
- a liquid crystal display device of the present invention includes a liquid crystal panel in which a liquid crystal layer is disposed between an active matrix substrate and a counter substrate, and the liquid crystal panel displays an image on the panel surface.
- the liquid crystal panel has a plurality of photosensor elements for detecting the intensity of received light.
- the sensor element includes an area sensor unit that detects an input position from the outside by detecting an image on the panel surface, and the area sensor unit includes a photo sensor element that detects the intensity of received light, and the light
- a temperature compensation sensor for performing temperature compensation on the sensor element, and the temperature compensation sensor is provided on the lower layer light blocking film and the lower layer light blocking film, and the liquid crystal display device is disposed on the sensor element.
- the liquid crystal display device is provided with an optical sensor element for detecting the intensity of received light and a temperature compensation sensor.
- the temperature compensation sensor is provided with an optical sensor element for temperature detection that can be simultaneously formed by the same manufacturing process as the optical sensor element. Therefore, it is possible to minimize the variation in characteristics of the optical sensor element that may occur due to different production lots.
- the temperature compensation sensor has a configuration in which a lower-layer blocking film for blocking light (ultraviolet light, visible light, and infrared light) is provided below the temperature detecting photosensor element.
- the temperature compensation sensor is provided so as to cover the temperature detection optical sensor element and includes an upper layer light blocking film that blocks ultraviolet rays, visible rays, and infrared rays.
- a liquid crystal display device including an area sensor with high detection accuracy can be realized without being affected by the use environment temperature.
- the upper light blocking film is preferably a reflective film.
- the temperature compensation sensor is for compensating for the influence of the temperature of the optical sensor element, when the upper light blocking film provided in the temperature compensation sensor is a reflective film.
- the upper light blocking film it is possible to suppress an influence on the temperature detecting photosensor element due to a temperature rise that may occur due to light absorption, and it is possible to perform temperature compensation with higher accuracy.
- a liquid crystal display device including an area sensor with higher detection accuracy can be realized without being affected by the use environment temperature.
- the temperature compensation sensor is provided on the outermost peripheral portion of the display area of the liquid crystal panel.
- the upper light blocking film provided in the temperature compensation sensor is made of a reflective film.
- the reflective film include aluminum, silver, and other metal films having high reflectivity in the ultraviolet, visible light, and infrared regions, but the present invention is not limited to this, and the light wavelength described above. Any substance having a high reflectance in the region can be used.
- the reflective film reflects the visible light region, there is a problem that it is conspicuous to human eyes. If the reflective film is scattered around the center of the liquid crystal panel, there is a drawback (the display is lacking in the display region). As a point region that is recognized as such.
- the temperature compensation sensor including the reflective film at the outermost peripheral portion of the display area of the liquid crystal panel, the reflective film is dotted at the center of the display area of the liquid crystal display device. It is possible to prevent the display quality of the liquid crystal display device from being deteriorated by being recognized as a defect (a point region where display is missing).
- the reflective film is a metal film, it is possible to suppress the influence of parasitic capacitance or the like in the central portion of the display area of the liquid crystal display device.
- the temperature compensation sensor detects the accurate temperature. May not be possible.
- the temperature compensation sensor is provided in the entire area of the outermost peripheral part of the display area of the liquid crystal panel, the temperature variation of each part of the liquid crystal panel is averaged. Accurate temperature compensation can be performed.
- the area sensor unit is provided with a light intensity sensor for detecting light intensity in an environment where the liquid crystal display device is placed, at a position adjacent to the optical sensor element.
- the light intensity sensor preferably has a light sensor element formed on the active matrix substrate by the same manufacturing process as the light sensor element.
- the ambient light intensity obtained by the light intensity sensor can be accurately It can reflect in the optical sensor element for sensors. That is, it is possible to estimate an accurate output of the area sensor with respect to ambient light.
- the area sensor unit is provided with an infrared light intensity sensor for detecting the intensity of infrared light in an environment where the liquid crystal display device is placed at a position adjacent to the optical sensor element.
- the infrared light intensity sensor is provided so as to cover the light sensor element for light intensity detection and the light sensor element (for light intensity detection), and absorbs ultraviolet light and visible light. And a membrane.
- the intensity of infrared rays irradiated from the outside can be detected.
- the optical sensor element for detecting the light intensity can be formed by the same manufacturing process as the optical sensor element for the area sensor, the intensity of the infrared light obtained by the infrared light intensity sensor is accurately determined for the area sensor. Can be reflected in the optical sensor element.
- the lower light blocking film and the upper light blocking film are formed of the same material.
- the lower light blocking film is made of the same material as the upper light blocking film, ultraviolet light, visible light, and infrared light can be received even from light incident from the opposite side of the detection target surface. Therefore, temperature compensation with higher accuracy can be performed.
- liquid crystal display device including an area sensor that can perform temperature compensation with high accuracy can be realized.
- the liquid crystal panel has a plurality of optical sensor elements that detect the intensity of received light, and each optical sensor element detects an image on the panel surface.
- An area sensor unit that detects an input position from the outside is provided, and the area sensor unit includes a photosensor element that detects the intensity of received light, and a temperature compensation sensor that performs temperature compensation on the photosensor element.
- the temperature compensation sensor is provided on the lower light blocking film and the lower light blocking film, and the temperature detecting optical sensor element detects the temperature of the environment where the liquid crystal display device is placed.
- an upper light blocking film provided to cover the temperature detecting photosensor element and blocking ultraviolet rays, visible rays and infrared rays.
- FIG. 4 is a diagram illustrating a configuration of each sensor provided in the liquid crystal panel illustrated in FIG. 1, in which (a) illustrates a cross-section of the XX ′ portion in the visible light sensor illustrated in FIG. 3, and (b) illustrates FIG.
- FIG. 4C shows a cross section of the YY ′ portion in the infrared light sensor shown in FIG. 3
- FIG. 3C shows a cross section of the ZZ ′ portion in the visible light sensor shown in FIG. 3 and the infrared light sensor shown in FIG.
- It is a schematic diagram for demonstrating the structure of the liquid crystal panel shown in FIG. 7 is a graph showing the spectral sensitivity (sensor output for each wavelength) of each sensor provided in the liquid crystal panel 20 shown in FIG. 6, (a) shows the case of sensor A, and (b) shows the case of sensor B. Indicates. It is sectional drawing which shows schematic structure of the temperature compensation sensor with which the liquid crystal panel shown in FIG.
- FIG. 7 is a schematic diagram showing a recognition image in each sensor provided in the liquid crystal panel 20 shown in FIG. 6, (a) shows a recognition image when the sensor A is used, and (b) shows a sensor B. The recognition image in the case is shown.
- FIG. 7 is a schematic diagram illustrating a target illuminance range suitable for detection by each sensor provided in the liquid crystal panel 20 illustrated in FIG. 6, where (a) illustrates a case using a sensor A and (b) illustrates a sensor B. Shows the case.
- FIGS. 1 to 12 An embodiment of the present invention will be described with reference to FIGS. 1 to 12 as follows. Note that the present invention is not limited to this.
- a touch panel integrated liquid crystal display device having an area sensor function (specifically, a touch panel function) will be described.
- a touch panel integrated liquid crystal display device 100 (also simply referred to as a liquid crystal display device 100) shown in FIG. 2 has a touch panel function in which an optical sensor element provided for each pixel detects an input position by detecting an image on the surface of the display panel. have.
- the touch panel integrated liquid crystal display device 100 of the present embodiment includes a liquid crystal panel 20 (area sensor unit) and a back that is provided on the back side of the liquid crystal panel 20 and emits light to the liquid crystal panel.
- a light 10 is provided.
- the liquid crystal panel 20 includes an active matrix substrate 21 in which a large number of pixels are arranged in a matrix, and a counter substrate 22 disposed so as to face the active matrix substrate 21. Further, a display medium is provided between the two substrates. A certain liquid crystal layer 23 is sandwiched.
- the display mode of the liquid crystal panel 20 is not particularly limited, and any display mode such as a TN mode, an IPS mode, and a VA mode can be applied.
- a front side polarizing plate 40a and a back side polarizing plate 40b are provided so as to sandwich the liquid crystal panel 20.
- Each polarizing plate 40a and 40b serves as a polarizer.
- the polarization direction of the front-side polarizing plate 40a and the polarization direction of the back-side polarizing plate 40b are arranged so as to have a crossed Nicol relationship.
- a normally black mode liquid crystal display device can be realized.
- the active matrix substrate 21 includes a TFT (not shown) that is a switching element for driving each pixel, an alignment film (not shown), a visible light sensor 31A (area sensor unit), and an infrared light sensor 31B (area). Sensor portion) and a temperature compensation sensor 50 are provided.
- the visible light sensor 31 ⁇ / b> A and the infrared light sensor 31 ⁇ / b> B are configured to include a light sensor element 30 provided in each pixel region.
- the temperature compensation sensor 50 includes an optical sensor element 30A provided in each pixel region. The optical sensor element 30 and the optical sensor element 30A flow different values of current depending on the amount of received light.
- the liquid crystal display device is located at a position adjacent to the optical sensor element 30 (specifically, the optical sensor element 30a or 30b) constituting the area sensor.
- An infrared light intensity sensor (light intensity sensor) 30c for detecting the intensity of infrared light in the environment where 100 is placed is provided.
- the counter substrate 22 is formed with a color filter layer, a counter electrode, an alignment film, and the like.
- the color filter layer is composed of colored portions having respective colors of red (R), green (G), and blue (B), and a black matrix.
- the photosensor element 30 is provided in each pixel region, thereby forming the visible light sensor 31A and the infrared light sensor 31B. Yes.
- the visible light sensor 31A and the infrared light sensor 31B each detect an image on the panel surface, thereby realizing an area sensor that detects an input position from the outside.
- the optical sensor element 30 reads the position and inputs information to the device. Can be executed.
- the touch panel function can be realized by the optical sensor element 30.
- the optical sensor element 30 is formed of a photodiode or a phototransistor, and detects the amount of received light by flowing a current corresponding to the intensity of received light.
- the TFT and the optical sensor element 30 may be monolithically formed on the active matrix substrate 21 by substantially the same process. That is, some constituent members of the optical sensor element 30 may be formed simultaneously with some constituent members of the TFT.
- Such a method for forming an optical sensor element can be performed in accordance with a conventionally known method for manufacturing a liquid crystal display device incorporating an optical sensor element.
- the temperature compensation sensor 50 is a correction sensor for performing temperature compensation on the optical sensor element 30 provided in the visible light sensor 31A and the infrared light sensor 31B.
- an optical sensor element 30A having the same configuration as the optical sensor element 30 constituting the area sensor is used as the optical sensor element constituting the temperature compensation sensor 50. That is, the optical sensor element 30A constituting the temperature compensation sensor 50 and the optical sensor element 30 constituting the area sensor are formed on the active matrix substrate 21 by the same design and process (manufacturing process). It is a thing. A specific configuration of the temperature compensation sensor 50 will be described later.
- the infrared light intensity sensor 30c measures the intensity of infrared light in the environment where the liquid crystal display device 100 is placed. As shown in FIG. 3, the infrared light intensity sensor 30c is provided at a position adjacent to the optical sensor element 30a in the visible light sensor 31A. As shown in FIG. 4, the infrared light intensity sensor 30c is provided at a position adjacent to the optical sensor element 30b in the infrared light sensor 31B.
- the optical sensor element 30 constituting the infrared light intensity sensor 30c has the same configuration as the optical sensor elements 30a and 30b constituting the area sensor.
- the light sensor element 30 (light sensor element for light intensity detection) constituting the infrared light intensity sensor 30c, and the light sensor elements 30a and 30b constituting the visible light sensor 31A and the infrared light sensor 31B. Is formed on the active matrix substrate 21 by the same design and process (manufacturing process).
- the backlight 10 irradiates the liquid crystal panel 20 with light, but in the present embodiment, the backlight 10 irradiates the liquid crystal panel 20 with infrared light in addition to white light. Yes.
- a backlight for irradiating light including infrared light can be realized by a known method.
- FIG. 2 shows a liquid crystal driving circuit 60 that performs display driving on the liquid crystal panel 20, and a sensor control unit 70 for driving the area sensor, the infrared light intensity sensor 30c, and the temperature compensation sensor 50. .
- the sensor control part 70 the internal structure is also shown. Note that a conventionally known configuration can be applied to the configuration of the liquid crystal driving circuit of the present embodiment.
- a timing generation circuit 71 As shown in FIG. 2, in the sensor control unit 70, a timing generation circuit 71, an optical sensor element driving circuit 72, an area sensor readout circuit 73, a coordinate extraction circuit 74, an interface circuit 75, an optical intensity sensor readout circuit 76, an optical sensor An intensity measuring unit 77 and a temperature compensation sensor reading circuit 78 are provided.
- the timing generation circuit 71 generates a timing signal for controlling the operation of each circuit in synchronization.
- the optical sensor element driving circuit 72 supplies power for driving each optical sensor element 30 constituting the area sensor and the light intensity sensor 30c and each optical sensor element 30A constituting the temperature compensation sensor 50.
- the area sensor readout circuit 73 receives a light reception signal from the optical sensor elements 30 (specifically, the optical sensor elements 30a and 30b) constituting the area sensor, and calculates a light reception amount from the obtained current value.
- the area sensor readout circuit 73 starts from the current value (sensor output) received from the photosensor element 30 constituting the area sensor, from the photosensor element 30A provided in the temperature compensation sensor 50.
- a value obtained by subtracting the received current value (expected dark current value sent from the temperature compensation sensor readout circuit 78) is sent to the coordinate extraction circuit 74. Thereby, temperature compensation is performed for the area sensor.
- the coordinate extraction circuit 74 calculates the coordinates of the finger touched on the surface of the liquid crystal panel (detection target surface 100a). calculate.
- the interface circuit 75 outputs the information (position information) of the finger coordinates calculated in the coordinate extraction circuit 74 to the outside of the liquid crystal display device 100.
- the liquid crystal display device 100 is connected to a PC or the like via the interface circuit 75.
- the light intensity sensor readout circuit 76 receives the light reception signal from the optical sensor element 30 included in the infrared light intensity sensor 30c, and calculates the amount of light received from the obtained current value.
- the light intensity sensor reading circuit 76 uses the current value received from the light sensor element 30 that constitutes the infrared light intensity sensor 30c as the light sensor element 30A provided in the temperature compensation sensor 50.
- the value obtained by subtracting the current value received from (the expected dark current value sent from the temperature compensation sensor readout circuit 78) is sent to the light intensity measurement unit 77. Thereby, temperature compensation is performed for the infrared light intensity sensor 30c.
- the light intensity measurement unit 77 calculates the intensity of the infrared light in the environment where the apparatus is located, based on the current value calculated by the light intensity sensor readout circuit 76 (output of the infrared light intensity sensor after temperature compensation). .
- the coordinate extraction circuit 74 extracts a light reception signal from the optical sensor element 30 included in the visible light sensor 31A or an optical sensor included in the infrared light sensor 31B. It is determined whether a light reception signal from the element 30 is extracted.
- the visible light sensor 31A and the infrared light sensor 31B can be properly used according to the surrounding infrared light intensity.
- the temperature compensation sensor readout circuit 78 calculates a current value (referred to as a dark current expected value) flowing in the optical sensor element 30A (temperature detection optical sensor element) included in the temperature compensation sensor 50, and the above-mentioned. To the area sensor readout circuit 73 and the light intensity sensor readout circuit 76.
- the optical sensor element formed in the liquid crystal panel 20 when a finger or an input pen touches the surface (detection target surface 100a) of the device. 30 can detect an input position by capturing a finger or an input pen as an image.
- each sensor visible light sensor 31A, infrared light sensor 31B, infrared light intensity sensor 30c, and temperature compensation sensor 50
- the visible light sensor 31A is referred to as sensor A
- the infrared light sensor 31B is referred to as sensor B.
- FIG. 1 schematically shows the configuration of each sensor in the display area (active area) 20a of the liquid crystal panel 20.
- FIG. 1 does not show a specific configuration in the liquid crystal panel 20, but a plurality of data signal lines and a plurality of gate signal lines are arranged in the liquid crystal panel 20 so as to cross each other.
- a pixel electrode is disposed near each intersection via a TFT.
- a colored portion of red (R), green (G), or blue (B) is formed at a position facing each pixel electrode.
- R red
- G green
- B blue
- One pixel includes three pixel electrodes including an R pixel electrode, a G pixel electrode, and a B pixel electrode.
- a plurality of pixels are arranged in a matrix form vertically and horizontally.
- the optical sensor element 30A provided in each pixel arranged in the outermost peripheral area in the display area 20a is used as the temperature compensation sensor 50.
- the area where the temperature compensation sensor 50 is arranged is shaded.
- Each of the pixels other than the outermost peripheral area in the display area 20a is also provided with a photosensor element 30, and each of these photosensor elements is one of the sensor A, the sensor B, and the infrared light intensity sensor 30c. Is configured. As shown in FIG. 1, the sensor A and the sensor B are arranged in a matrix form vertically and horizontally along the arrangement of each pixel. Furthermore, in the present embodiment, the sensor A and the sensor B are arranged in a checkered pattern in a mutually different manner.
- the infrared light intensity sensor 30c is provided in each of the sensors A and B.
- FIG. 3 shows a more detailed configuration of the sensor A.
- FIG. 4 shows a more detailed configuration of the sensor B.
- one unit of sensor A and one unit of sensor B include a total of 16 pixels each consisting of 4 pixels ⁇ 4 pixels.
- One pixel is composed of three pixel electrodes of R, G, and B as described above.
- the sensor A includes a plurality of optical sensor elements 30.
- the optical sensor element 30a that detects the intensity of received visible light and an infrared light intensity sensor 30c are configured.
- the optical sensor element 30 is divided into two types.
- the sensor B includes a plurality of optical sensor elements.
- the optical sensor element 30b for detecting the intensity of received infrared light and the infrared light intensity sensor 30c are provided.
- the optical sensor element 30 is divided into two types.
- 5A to 5C show cross-sectional configurations of the optical sensor element 30a, the optical sensor element 30b, and the infrared light intensity sensor 30c, respectively.
- 5A shows a cross-sectional configuration of the XX ′ portion in the visible light sensor 31A of FIG. 3
- FIG. 5B shows the YY ′ portion of the infrared light sensor 31B of FIG.
- FIG. 5C shows a cross-sectional configuration of the ZZ ′ portion in the infrared light intensity sensor 30c.
- the 5A has an optical sensor element 30 formed on the active matrix substrate 21.
- the optical sensor element 30a shown in FIG. About the structure of the optical sensor element 30a for detecting the intensity
- the optical sensor element 30b shown in FIG. 5B includes the optical sensor element 30 formed on the active matrix substrate 21, similarly to the optical sensor element 30a. And the optical filter 25 which interrupts
- the optical filter 25 has a laminated structure of a red color filter 25R and a blue color filter 25B that form a colored portion of the color filter layer. Thereby, the visible light component of the light components incident on the optical sensor element 30 can be blocked.
- the optical sensor element 30b is also provided on the counter substrate 22 in the region where the optical sensor element 30 is disposed.
- An optical filter 25 having the same structure as the optical filter 25 is provided, and an opening 25c for transmitting light (light in all wavelength regions) is provided immediately above the optical sensor element 30. .
- the optical filter 25 also in the sensor A, it is possible to prevent a difference in display appearance between the pixel having the sensor A and the pixel having the sensor B.
- the distance between the optical sensor element 30 and the optical filter 25 in the stacking direction of each layer on the substrate is d1
- the end of the optical sensor element 30 and the end of the optical filter 25 in the direction along the substrate surface is d1
- the distance d2 with the portion (the end portion of the opening 25c) is not less than the following value.
- ⁇ is a value (distance) obtained by adding a bonding tolerance between the active matrix substrate 21 and the counter substrate 22 to a finished dimension tolerance of the optical sensor element 30 and the optical filter 25.
- the infrared light intensity sensor 30c shown in (c) of FIG. 5 has the optical sensor element 30 formed on the active matrix substrate 21, like the visible light sensor and the infrared light sensor.
- the photosensor element 30c has a configuration different from that of the photosensor elements 30a and 30b.
- a matrix 27 (upper layer light blocking film) is provided.
- the black matrix 27 is formed of carbon black, as shown in FIG. 14, ultraviolet rays and visible rays are not transmitted, but infrared rays are transmitted.
- the electromotive current obtained from the optical sensor element 30c the electromotive current due to the intensity of ultraviolet light and visible light is eliminated, and the electromotive current due to the intensity of only infrared light can be detected.
- the infrared light intensity sensor 30c can detect the intensity of infrared light in the environment where the liquid crystal display device 100 is placed.
- the light receiving sensitivity of the light sensor element 30 constituting the infrared light intensity sensor 30c is a predetermined light receiving sensitivity compared to the light receiving sensitivity of the light sensor element 30b constituting the infrared light sensor 31B. The percentage is lower. That is, the light receiving sensitivity of the light sensor element 30 constituting the infrared light intensity sensor 30c is 1 / n (where n is an arbitrary number greater than 1) compared to the light receiving sensitivity of the light sensor element 30b. It has become.
- the output of the infrared light intensity sensor 30c is set lower than that of the infrared light sensor 31B, and the sensor output is saturated under an infrared intensity higher than the infrared intensity when the output is saturated in the infrared light sensor 31B. I have to. Thereby, a wide range of environmental illuminance can be accurately measured without saturating the sensor output in the illuminance range to be measured.
- only one photosensor element 30 among n photosensor elements 30 (where n is an integer of 2 or more) constituting the infrared light intensity sensor 30c drives the sensor element. It is configured to be connected to the optical sensor element driving circuit 72 through the wiring (for example, the data signal line). That is, the (n ⁇ 1) optical sensor elements 30 are disconnected from the optical sensor element driving circuit 72 and are not connected. Since the optical sensor element 30 that is not connected to the optical sensor element driving circuit 72 does not function as the infrared light intensity sensor 30c, in the above configuration, only one of the n elements is the infrared light intensity sensor 30c. Will work.
- the number of the optical sensor elements 30 constituting the infrared light intensity sensor 30c is reduced (that is, not connected to the drive circuit).
- a configuration in which no optical sensor element is formed is also possible.
- the transmitted light amount (light amount incident from the panel surface 100a) is 1 / n (where n is greater than 1) on each optical sensor element 30 constituting the infrared light intensity sensor 30c.
- n is greater than 1
- a neutral density filter is provided which is reduced to an arbitrary number).
- a broadband ND filter can be used.
- the ND filter is a filter that uniformly lowers the spectral transmittance, and includes an absorption type, a reflection type, and a composite type.
- the ambient light intensity in a wide range can be accurately measured by reducing the light receiving sensitivity of the light sensor element for the infrared light intensity sensor by a predetermined ratio.
- FIG. 6 shows an example in which the liquid crystal panel of the present embodiment is realized by combining the liquid crystal panel 20c provided with the sensor A and the optical filter structure 26.
- 6 is a graph showing the spectral sensitivity (sensor output for each wavelength) of the sensor A, and the graph shown in the middle right is a visible light blocking unit provided in the optical filter structure 26. It is a graph which shows the spectral transmittance (the transmittance
- a liquid crystal panel 20c shown in FIG. 6 has a configuration in which the above-described sensors A (visible light sensors) are arranged in a matrix in the vertical and horizontal directions.
- the sensor A has a certain degree of sensitivity in the entire wavelength region from visible light to infrared light.
- optical filter structure 26 shown in FIG. 6 has a configuration in which the visible light blocking portions 26a and the visible light transmitting portions 26b are alternately arranged in a checkered pattern.
- the visible light blocking unit 26a blocks visible light (that is, a wavelength of 780 nm or less). Any material can be used as the material of the visible light blocking unit 26a as long as it has a characteristic of blocking visible light (that is, a wavelength of 780 nm or less) and transmitting infrared light.
- the visible light blocking unit 26a As a specific example of the structure of the visible light blocking unit 26a, a structure in which a red color filter and a blue color filter are stacked as in the optical filter 25 described above can be given. By combining red and blue color filters, visible light can be reliably blocked. In addition to this, there is also an advantage that the optical filter structure 26 can be incorporated in the color filter layer provided on the counter substrate 22 of the liquid crystal panel 20.
- the visible light transmitting portion 26b of the optical filter structure 26 an opening is formed at a position corresponding to the light receiving portion of the optical sensor element 30a of the sensor A. As a result, light in the entire wavelength region is incident on the light receiving portion of the optical sensor element 30a.
- the region other than the opening of the visible light transmitting portion 26b is formed of an RB filter (an optical filter in which an R color filter and a B color filter are stacked).
- FIG. 12 schematically shows a structure in which a sensor A having an opening 25c formed in the optical filter 25 and a sensor B having an optical filter 25 having no opening are alternately arranged. .
- FIG. 6 By inserting the optical filter structure 26 into the liquid crystal panel 20c, a liquid crystal panel 20 in which sensors A and B are alternately arranged in a checkered pattern as shown in FIG. 6 is obtained.
- 7A shows the spectral sensitivity of the sensor A of the liquid crystal panel 20 shown in FIG. 6, and
- FIG. 7B shows the spectral sensitivity of the sensor B of the liquid crystal panel 20 shown in FIG.
- the sensor A reacts to wavelengths in the visible region and the infrared region, and can detect the intensity of light including both visible light and infrared light.
- the sensor B reacts only to the wavelength in the infrared region and can detect the intensity of the infrared light.
- the liquid crystal panel 20 can detect images on the panel surface by two types of optical sensors, the sensor A and the sensor B, respectively. That is, in the liquid crystal panel 20, the input position can be detected by two types of methods, that is, the input position detection using the touch panel function by the sensor A and the input position detection using the touch panel function by the sensor B.
- the temperature compensation sensor 50 which is another sensor provided in the liquid crystal panel 20, will be described.
- a temperature compensation sensor 50 is disposed in the outermost peripheral area of the display area. That is, the temperature compensation sensor 50 is configured by the optical sensor element 30A formed in each pixel located on the outermost periphery of the pixels arranged in a matrix form vertically and horizontally in the display area. The temperature compensation sensor 50 is arranged so as to surround the sensors A and B arranged in a matrix.
- the temperature compensation sensor 50 is configured by the plurality of optical sensor elements 30A arranged in the outermost peripheral region of the display region, and each light constituting the temperature compensation sensor 50 is formed. An average value of the amount of light received from the sensor element 30A is taken and used for temperature compensation.
- FIG. 8 shows a configuration of the temperature compensation sensor 50 provided in the liquid crystal display device 100 of the present embodiment.
- 8A is a diagram showing a configuration in which the upper light blocking film 34 is provided on the active matrix substrate 21 side
- FIG. 8B is a diagram in which the upper light blocking film 34 is provided on the counter substrate 22 side.
- the temperature compensation sensor 50 is for performing temperature compensation for each optical sensor element constituting the area sensor.
- the temperature compensation sensor 50 is provided so as to cover the lower layer light blocking film 33, the optical sensor element 30A (temperature detection optical sensor element) provided on the lower layer light blocking film 33, and the optical sensor element 30A.
- an upper light blocking film that blocks ultraviolet rays, visible rays, and infrared rays.
- the lower light blocking film 33 is disposed below the optical sensor element 30A, and emits light (ultraviolet light, visible light, and infrared light) to enter the optical sensor element 30A from the substrate 21 side (backlight 10 side). It is for blocking.
- the optical sensor element 30A has the same configuration as the optical sensor element 30A functioning as an area sensor, but the liquid crystal display device 100 is configured by combining the lower layer light blocking film 33 and the upper layer light blocking film 34. It functions as an optical sensor element for temperature detection that detects the temperature of the environment where the is placed.
- the upper layer light blocking film 34 is provided on the active matrix substrate 21 side, for example, the upper layer light blocking film 34 is heated.
- the upper-layer light blocking film 34 provided in the temperature compensation sensor 50 is made of a material that absorbs light, the temperature of the upper-layer light blocking film 34 increases due to light absorption, and the temperature compensation sensor 50 is provided. Since there is a possibility of affecting the optical sensor element 30A, as shown in FIG. 8B, the upper-layer light blocking film 34 is provided with a certain distance from the optical sensor element 30A for temperature detection. More preferably, the configuration is used.
- the temperature detection optical sensor element 30A provided in the temperature compensation sensor 50 is formed simultaneously by the same manufacturing process as each optical sensor element 30 constituting the area sensor. Therefore, characteristic variations between the optical sensor element 30 and the optical sensor element 30 ⁇ / b> A that can occur due to different production lots can be minimized.
- the temperature compensation sensor 50 is provided so as to cover the temperature detecting optical sensor element 30A, and includes an upper light blocking film 34 that blocks ultraviolet rays, visible rays, and infrared rays. Since it is a structure, the temperature compensation of the optical sensor element 30 can be performed without being affected by leaked infrared rays as in the prior art described above.
- the material for the upper layer light blocking film 34 is not particularly limited as long as it has a function of blocking ultraviolet rays, visible rays, and infrared rays. Examples of the material that can block ultraviolet rays, visible rays, and infrared rays include metal materials.
- the liquid crystal display device 100 including the area sensor with high detection accuracy can be realized without being affected by the use environment temperature.
- the upper light blocking film 34 can be made of any material as long as it blocks ultraviolet rays, visible rays, and infrared rays, but the temperature compensation sensor 50 depends on the temperature of the optical sensor element 30. This is to compensate for the influence. Therefore, the upper light blocking film 34 is preferably a reflective film that reflects light.
- the upper light blocking film 34 it is possible to suppress the influence on the temperature compensation sensor 50 due to a temperature rise that may occur due to light absorption, and it is possible to perform temperature compensation with higher accuracy.
- the upper light blocking film 34 for example, a metal film such as aluminum or silver having high reflectivity in the ultraviolet, visible light, and infrared regions can be used, but the present invention is not limited to this. Any substance having a high reflectance in the light wavelength region can be used.
- an aluminum film having a high reflectance in the ultraviolet, visible light, and infrared regions is used as the upper light blocking film 34.
- the temperature compensation sensor 50 is preferably provided at the outermost peripheral portion of the display area of the liquid crystal panel 20 provided in the liquid crystal display device 100 of the present embodiment.
- the upper light blocking film 34 provided in the temperature compensation sensor 50 is preferably made of a reflective film.
- the reflective film reflects the visible light region, there is a problem that the reflective film is conspicuous to human eyes. It is recognized as a point area that is recognized as missing.
- the temperature compensation sensor 50 including the reflective film is provided on the outermost peripheral portion of the display area of the liquid crystal panel 20, so that the reflective film has a point defect (displays in the display area of the liquid crystal display device 100). It is possible to prevent the display quality of the liquid crystal display device 100 from being deteriorated.
- the reflective film is a metal film, it is possible to suppress the influence due to the parasitic capacitance in the display region of the liquid crystal display device 100.
- position detection using the visible light sensor 31A is performed according to the infrared light intensity detected by the infrared light intensity sensor 30c, or the infrared light sensor.
- Switching between performing position detection using 31B is performed. This sensor switching can be determined by paying attention to which sensor can be used for more accurate position detection within a specific illuminance range.
- the illuminance range that is good (the illuminance range in which accurate position detection can be performed) and the illuminance range that is not good (the illuminance range in which errors can occur in position detection) will be described. To do.
- the sensor control unit 70 recognizes the portion touched on the panel surface when the sensor A is used and when the sensor B is used. Shows what happens. 9A shows the case where the sensor A is used, and FIG. 9B shows the case where the sensor B is used.
- a portion T1 touched by a finger or the like becomes a dark image as compared with other portions. This is because the amount of light received by the optical sensor element 30a is smaller than the optical sensor elements 30a in other regions because the outside light is blocked at the touched portion.
- the touched portion T2 becomes a brighter image than the other portions. This is because light including infrared light is irradiated from the backlight 10 of the liquid crystal display device 100, and the infrared light is reflected by a finger touching the panel surface or the like at the touched portion. This is because the infrared light passes out of the liquid crystal panel in a portion not touched (see FIG. 2).
- a suitable illuminance range for position detection by the sensor A is 10,000 lux which is relatively bright as shown in FIG. (Lx) to 100,000 lux (lx). This is because it is difficult to distinguish between a portion touched by visible light and a portion not touched in a dark environment.
- a bright image display such as white display is performed on the liquid crystal panel 20, and when the finger touches the bright image display area, the touched portion is recognized by the sensor A as a bright image. Misrecognition is likely to occur.
- a suitable illuminance range when performing position detection by the sensor B is as shown in FIG.
- the external light is irradiated light from a fluorescent lamp
- good position detection can be performed in any illuminance range (specifically, 0 to 100,000 lux (lx)).
- the fluorescent lamp does not contain infrared light, so that position detection can be performed without being affected by the ambient light intensity.
- a relatively dark illuminance of 0 to 10,000 lux (lx) is a suitable illuminance range.
- the infrared light is included in the sunlight, so that the intensity of the infrared light increases when the sunlight is strong, and the infrared light is detected even in the non-touched portion of the optical sensor element 30b. It is because it will be done.
- the infrared intensity in the environment where the liquid crystal display device 100 is placed is in the range of 1.00 to 1.80 mW / cm 2 . If it is less than or equal to this value, good position detection can be performed.
- the intensity of infrared rays is represented by the integrated radiation intensity of light having a wavelength of 800 to 1000 nm.
- the sensor to be used can be switched depending on whether or not the intensity of infrared rays in the environment where the liquid crystal display device 100 is placed is equal to or higher than a predetermined value.
- the predetermined value is preferably a value within a range of 1.00 to 1.80 mW / cm 2 .
- the sensor control unit 70 shown in FIG. 2 When performing such sensor switching, the sensor control unit 70 shown in FIG. 2 performs processing as follows.
- the light intensity sensor reading circuit 76 and the light intensity measuring unit 77 calculate the infrared intensity.
- the area sensor reading circuit 73 reads position information detected by the sensors A and B.
- the positional information of the sensors A and B obtained by the area sensor readout circuit 73 is sent to the coordinate extraction circuit 74 (sensor switching unit).
- the coordinate extraction circuit 74 uses any one of the position information detected by the sensor A and the position information detected by the sensor B based on the information on the infrared intensity transmitted from the light intensity measurement unit 77. Decide whether to perform detection.
- the transmitted infrared light intensity is a predetermined value (for example, 1.. In the case of 40 mW / cm 2 ) or more, as shown in FIG. 9A, a region (T1) obtained in black within the white region is recognized as the input position.
- a predetermined value for example, 1.40 mW / cm 2
- FIG. A region (T2) shown in white is recognized as an input position.
- the method of detecting the input position varies depending on whether the infrared light intensity in the environment is equal to or higher than the threshold value.
- the input position is detected using the information obtained by the sensor A as position information, and the infrared light intensity in the environment is less than the threshold.
- the input position is detected using information obtained by the sensor B as position information.
- the predetermined value (threshold value) of the infrared light intensity it is preferable to select a value within the range of 1.00 to 1.80 mW / cm 2 , for example.
- the position information obtained in the coordinate extraction circuit 74 is output to the outside via the interface circuit 75.
- the coordinate extraction circuit 74 can change the method of detecting the input position according to the ambient light intensity. Therefore, position detection from two types of sensors can be performed by one coordinate extraction circuit without providing a coordinate extraction circuit for sensor A and a coordinate extraction circuit for sensor B, respectively. As a result, the circuit scale can be reduced and the amount of information processing can be reduced.
- position detection can be performed using two types of sensors, the sensor A that detects visible light and the sensor B that detects infrared light.
- each sensor can be used properly according to the intensity range of infrared light that each company is good at, and compared with an area sensor that uses only two types of sensors with different light receiving sensitivities, a wider range of ambient light intensity In, accurate position detection can be performed.
- the coordinate extraction of the touched position is performed based on the detection information from one of the sensors by switching the coordinate extraction method according to the ambient light intensity. ing. Therefore, it is possible to perform coordinate extraction from two types of sensors with one coordinate extraction circuit.
- the configuration in which the sensors A and B are alternately arranged in a checkered pattern has been described as an example, but the present invention is not necessarily limited to such a configuration.
- the sensor A and the sensor B may be randomly arranged, or the sensor A and the sensor B may be alternately arranged for each column.
- the senor A and the sensor B are alternately arranged in a checkered pattern as in the present embodiment in that a decrease in resolution due to the provision of two types of optical sensors can be minimized. It is preferable.
- 11A is an example in which the sensors A and B are alternately arranged in a checkered pattern
- FIG. 11B is an example in which the sensors A and B are alternately arranged in each row. This is an example.
- the resolution of the sensor A when only the sensor A is arranged in a matrix form vertically and horizontally is 60 dpi (dots / inch)
- two types of sensors are shown in FIG. 11A.
- the resolution in the horizontal direction (x direction) and the vertical direction (y direction) are both (1 / ⁇ 2) ⁇ 60 ⁇ 42 dpi.
- the overall resolution is a small vertical resolution. Also, there is a difference in resolution between the vertical direction and the horizontal direction.
- a configuration in which a photosensor element is provided for each pixel is taken as an example.
- a photosensor element is not necessarily provided for each pixel.
- a configuration in which a photosensor element is provided for any one of R, G, and B pixel electrodes constituting one pixel may be employed.
- the lower light blocking film 33 and the upper light blocking film 34 are preferably made of the same material.
- the lower layer light blocking film 33 is made of the same material as the upper layer light blocking film 34, even in light incident from the opposite side of the detection target surface 100a, ultraviolet light, visible light is visible. Since light and infrared rays can be blocked, more accurate temperature compensation can be performed.
- the liquid crystal display device 100 including an area sensor that can perform temperature compensation with high accuracy can be realized.
- the present invention can be applied to an area sensor integrated liquid crystal display device including an area sensor (specifically, a touch panel).
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Abstract
Description
ここで、上記αは、光センサ素子30および光学フィルタ25の仕上がり寸法公差に、アクティブマトリクス基板21と対向基板22との貼り合わせ公差を加えた値(距離)である。これにより、センサAにおいて、パネル表面から見て光センサ素子30と光学フィルタ25とが重なって配置されることを確実に防ぐことができる。
20 液晶パネル(エリアセンサ部)
20a (液晶パネルの)表示領域
21 アクティブマトリクス基板
22 対向基板
23 液晶層
25 光学フィルタ
25B 青色のカラーフィルタ
25R 赤色のカラーフィルタ
25c 開口部
26 光学フィルタ構造
27 ブラックマトリクス(赤外光強度センサの上層光遮断膜)
30 光センサ素子
30A 光センサ素子(温度検知用の光センサ素子)
30a (可視光センサの)光センサ素子
30b (赤外光センサの)光センサ素子
30c 赤外光強度センサ(光強度センサ)
31A 可視光センサ(エリアセンサ部)
31B 赤外光センサ(エリアセンサ部)
33 (温度補償センサの)下層光遮断膜
34 (温度補償センサの)上層光遮断膜
50 温度補償センサ(エリアセンサ部)
100 タッチパネル一体型液晶表示装置(液晶表示装置)
100a パネル表面(検出対象面)
Claims (6)
- アクティブマトリクス基板と対向基板との間に液晶層が配置されている液晶パネルを備え、該液晶パネルが、パネル表面上の画像を検知することで、外部からの入力位置を検出するエリアセンサ機能を有している液晶表示装置において、
上記液晶パネルは、受光した光の強度を検知する光センサ素子を複数個有し、各光センサ素子がパネル表面上の画像を検知することで外部からの入力位置を検出するエリアセンサ部を備えており、
上記エリアセンサ部には、
受光した光の強度を検知する光センサ素子と、
上記光センサ素子に対して温度補償を行う温度補償センサとが備えられており、
上記温度補償センサは、
下層光遮断膜と、
上記下層光遮断膜上に設けられ、当該液晶表示装置が置かれている環境の温度を検知する温度検知用の光センサ素子と、
さらに、上記温度検知用の光センサ素子を覆うように設けられ、紫外線、可視光線および赤外線を遮断する上層光遮断膜とを備えていることを特徴とする液晶表示装置。 - 上記上層光遮断膜が、反射膜であることを特徴とする請求項1に記載の液晶表示装置。
- 上記温度補償センサは、上記液晶パネルの表示領域の最外周部分に設けられていることを特徴とする請求項2に記載の液晶表示装置。
- 上記エリアセンサ部には、上記光センサ素子と隣接する位置に、当該液晶表示装置が置かれている環境下の光の強度を検出する光強度センサが設けられており、
上記光強度センサは、上記アクティブマトリクス基板上に、上記光センサ素子と同一の製造工程によって形成された光センサ素子を有していることを特徴とする請求項1~3の何れか1項に記載の液晶表示装置。 - 上記エリアセンサ部には、上記光センサ素子と隣接する位置に、当該液晶表示装置が置かれている環境下の赤外線の強度を検出する赤外光強度センサが設けられており、
上記赤外光強度センサは、
光強度検知用の光センサ素子と、
上記光センサ素子を覆うように設けられ、紫外線および可視光線を吸収する上層光遮断膜とを備えていることを特徴とする請求項1~3の何れか1項に記載の液晶表示装置。 - 上記温度補償センサにおいて、上記下層光遮断膜と上記上層光遮断膜とは、同一材料で形成されていることを特徴とする請求項1~5の何れか1項に記載の液晶表示装置。
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JP2010547391A JP5009421B2 (ja) | 2009-01-20 | 2009-08-28 | 液晶表示装置 |
CN200980154751.6A CN102282503A (zh) | 2009-01-20 | 2009-08-28 | 液晶显示装置 |
US13/144,366 US20110273404A1 (en) | 2009-01-20 | 2009-08-28 | Liquid crystal display device |
RU2011131378/28A RU2487380C2 (ru) | 2009-01-20 | 2009-08-28 | Жидкокристаллическое дисплейное устройство |
BRPI0924030A BRPI0924030A2 (pt) | 2009-01-20 | 2009-08-28 | dispositivo de exibição de cristal líquido |
EP09838829A EP2390713A1 (en) | 2009-01-20 | 2009-08-28 | Liquid crystal display device |
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EP (1) | EP2390713A1 (ja) |
JP (1) | JP5009421B2 (ja) |
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US8773451B2 (en) * | 2011-05-03 | 2014-07-08 | Apple Inc. | Color correction method and apparatus for displays |
KR20130119614A (ko) * | 2012-04-24 | 2013-11-01 | 삼성디스플레이 주식회사 | 센싱 장치 및 이미지 센싱 방법 |
JP6136948B2 (ja) * | 2014-01-24 | 2017-05-31 | 株式会社Jvcケンウッド | 撮像装置、映像信号処理方法及び映像信号処理プログラム |
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CN106707589A (zh) * | 2017-02-27 | 2017-05-24 | 惠科股份有限公司 | 液晶显示面板及装置 |
CN107329307B (zh) * | 2017-08-16 | 2021-02-09 | 上海天马微电子有限公司 | 显示装置 |
CN108762653B (zh) * | 2018-04-26 | 2020-10-30 | 北京集创北方科技股份有限公司 | 触碰定位方法、装置及电子设备 |
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JP2005091385A (ja) | 2003-09-11 | 2005-04-07 | Sharp Corp | 液晶表示装置 |
JP2006018219A (ja) * | 2004-05-31 | 2006-01-19 | Toshiba Matsushita Display Technology Co Ltd | 画像取込機能付き表示装置 |
JP2005352490A (ja) * | 2004-06-10 | 2005-12-22 | Samsung Electronics Co Ltd | 表示装置及びその駆動方法 |
JP2007018458A (ja) * | 2005-07-11 | 2007-01-25 | Sony Corp | 表示装置、センサ信号の補正方法並びに撮像装置 |
JP2007094098A (ja) * | 2005-09-29 | 2007-04-12 | Sanyo Epson Imaging Devices Corp | 液晶表示装置及び電子機器 |
JP2008203504A (ja) * | 2007-02-20 | 2008-09-04 | Hitachi Displays Ltd | 画面入力機能付き画像表示装置 |
JP2008241807A (ja) * | 2007-03-26 | 2008-10-09 | Seiko Epson Corp | 液晶装置及び電子機器 |
JP2008305154A (ja) * | 2007-06-07 | 2008-12-18 | Hitachi Displays Ltd | 表示装置 |
Also Published As
Publication number | Publication date |
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RU2487380C2 (ru) | 2013-07-10 |
EP2390713A1 (en) | 2011-11-30 |
BRPI0924030A2 (pt) | 2016-01-26 |
RU2011131378A (ru) | 2013-02-27 |
JP5009421B2 (ja) | 2012-08-22 |
CN102282503A (zh) | 2011-12-14 |
JPWO2010084639A1 (ja) | 2012-07-12 |
US20110273404A1 (en) | 2011-11-10 |
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