CN101409049B - Liquid crystal display apparatus and display lightness regulating method thereof - Google Patents
Liquid crystal display apparatus and display lightness regulating method thereof Download PDFInfo
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- CN101409049B CN101409049B CN2007101239236A CN200710123923A CN101409049B CN 101409049 B CN101409049 B CN 101409049B CN 2007101239236 A CN2007101239236 A CN 2007101239236A CN 200710123923 A CN200710123923 A CN 200710123923A CN 101409049 B CN101409049 B CN 101409049B
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Abstract
The invention relates to an LCD device and a display brightness adjusting method thereof. The LCD device comprises a sensitizing device, a processing unit and a brightness adjusting unit. The sensitizing device comprises at least two sensitizing units; the processing unit correspondingly selects to drive one sensitizing unit according to the ambient light luminance to cause the sensitizing unit to output a sensing signal, and the processing unit correspondingly outputs a brightness adjusting signal according to the sensing signal; and the brightness adjusting unit adjusts the display brightness of the LCD device according to the brightness adjusting signal. The LCD device has higher reliability in the display brightness adjustment.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator and display lightness regulating method thereof.
Background technology
Liquid crystal indicator because have low diathermaneity, characteristics such as volume is compact and power consumption is low, now be widely used in fields such as mobile phone, personal digital assistant, notebook computer, desktop computer and TV.Liquid crystal indicator is as a kind of display device, and its display brightness is a Specifeca tion speeification.In order to satisfy the display brightness demand of different situations, need adjust the brightness of liquid crystal indicator.For example, in darker indoor of light, liquid crystal indicator need be adjusted to relatively low display brightness, to avoid the injury of excessive brightness to beholder's eyes.Usually can be by driving an amorphous silicon film transistor that is exposed in the surround lighting, to produce the photocurrent of a corresponding ambient light, and receive this photocurrent by a processing unit, export ambient light intensity signal to a brightness adjusting unit corresponding with photocurrent intensity after treatment, brightness adjusting unit is according to the brightness of the suitable regulator solution crystal device of ambient light intensity signal.
Yet, this liquid crystal indicator is by the surround lighting of the single various illumination of amorphous silicon film transistor sensing, it easily causes amorphous silicon film transistor generation inner structure defective because of being exposed among the surround lighting for a long time and being driven, its photoelectric transformation efficiency reduces, cause the photocurrent decay that this amorphous silicon film transistor is exported among same surround lighting, thereby reduce according to the reliability of this photocurrent regulator solution crystal device brightness.
Summary of the invention
Regulate the not high problem of display brightness reliability in order to solve the prior art liquid crystal indicator, be necessary to provide a kind of higher liquid crystal indicator of display brightness reliability of regulating.
Regulate the not high problem of reliability in order to solve prior art liquid crystal indicator display brightness, also be necessary to provide the display lightness regulating method of the higher liquid crystal indicator of a kind of reliability.
A kind of liquid crystal indicator, it comprises a photosensitive device, a processing unit and a brightness adjusting unit.This photosensitive device comprises at least two photosensitive units.This processing unit is selected to drive with the corresponding photosensitive unit of ambient light scope and is closed other photosensitive units, makes this photosensitive unit export a sensing signal, and this processing unit is according to corresponding output one brightness regulated signal of this sensing signal.This brightness adjusting unit is regulated the display brightness of this liquid crystal indicator according to this brightness regulated signal.
A kind of display lightness regulating method of liquid crystal indicator, use the liquid crystal indicator of this display lightness regulating method to comprise a photosensitive device, a processing unit and a brightness adjusting unit, this photosensitive device comprises at least two photosensitive units, this brightness adjusting method comprises the steps: that this processing unit is selected to drive with the corresponding photosensitive unit of ambient light scope and closes other photosensitive units, makes this photosensitive unit export a sensing signal; This processing unit is according to corresponding output one brightness regulated signal of this sensing signal; This brightness adjusting unit is regulated the display brightness of this liquid crystal indicator according to this brightness regulated signal.
Compared with prior art, liquid crystal indicator of the present invention and display lightness regulating method thereof adopt a processing unit select to drive one of them of at least two photosensitive units according to ambient light, when this liquid crystal indicator places the environment of varying environment illuminance respectively, promptly can select to drive different photosensitive units, thereby to a certain degree reduce driven time of single photosensitive unit, reduce photosensitive unit because of being driven the probability that photoelectric transformation efficiency reduces for a long time, make according to the reliability of sensing signal that this photosensitive device is exported adjusting display brightness higher.
Description of drawings
Fig. 1 is the structural representation of liquid crystal indicator first embodiment of the present invention.
Fig. 2 is the amplification view of photosensitive device shown in Figure 1.
Fig. 3 is the electrical block diagram of photosensitive device shown in Figure 2.
Fig. 4 is the block scheme of the control circuit of liquid crystal indicator shown in Figure 1.
Fig. 5 is the structural representation of liquid crystal indicator second embodiment of the present invention.
Fig. 6 is the synoptic diagram of the photo-sensitive cell of liquid crystal indicator the 3rd embodiment of the present invention.
Embodiment
Seeing also Fig. 1, is the structural representation of liquid crystal indicator first embodiment of the present invention.This liquid crystal indicator 2 comprises a photosensitive device 20, a viewing area 25, a framework 22, a bracing or strutting arrangement 26 and a control circuit (figure does not show).This viewing area 25 is rectangle regions, and it is used for display frame.This photosensitive device 20 is adjacent with this viewing area 25, and it is used for the illumination of sense ambient light and exports the light sensing signal.This control circuit is according to the corresponding ambient light of light sensing signal output of this photosensitive device 20 outputs, and according to the display brightness of this viewing area 25 of the corresponding adjusting of ambient light.This framework 22 is accommodated this photosensitive device 20, this viewing area 25 and this control circuit.This bracing or strutting arrangement 26 supports this framework 22.
Seeing also Fig. 2, is the cut-away enlarged view of photosensitive device 20 shown in Figure 1.This photosensitive device 20 comprises second substrate 24 of one first substrate 23 and relative this first substrate 23.This first substrate 23 comprises one first photo-sensitive cell 260, one second photo-sensitive cell 262, one the 3rd photo-sensitive cell 264, one the 4th photo-sensitive cell 266, one the 5th photo-sensitive cell 267 and a compensating element, 27 towards a surface of this second substrate 24.This second substrate 24 comprises a black matrix 240 and one first translucent element 245, one second translucent element 246, one the 3rd translucent element 247 and one the 4th translucent element 248 that are provided with at interval with this black matrix 240 towards the surface of this first substrate 23.Be filled with a liquid crystal layer (figure does not show) between this first substrate 23 and this second substrate 24.
These a plurality of translucent elements are that pigment and emulsion etc. is sneaked into the formed colored photoresist layer of resin, and the transmittance of this first translucent element 245, this second translucent element 246, the 3rd translucent element 247 and the 4th translucent element 248 increases progressively successively and less than the transmittance of this second substrate 24.For example, the transmittance of this first translucent element 245, this second translucent element 246, the 3rd translucent element 247 and the 4th translucent element 248 and this second substrate 24 is respectively 40, percent 60, percent 80 20 percent, percent and absolutely.The transmittance of equal each translucent element of may command of thickness of concentration, color or translucent element by adjusting pigment.
This compensating element, 27 is amorphous silicon film transistors, and it is corresponding to this black matrix 240, thereby it can't accept the irradiation of surround lighting because should deceive blocking of matrix 240.This first photo-sensitive cell 260, this second photo-sensitive cell 262, the 3rd photo-sensitive cell 264, the 4th photo-sensitive cell 266 and the 5th photo-sensitive cell 267 are respectively amorphous silicon film transistors, it is respectively to should first translucent element 245, this second translucent element 246, the 3rd translucent element 247, the 4th translucent element 248 and be positioned at second substrate 24 of 240 in this black matrix, when thereby this photosensitive device 20 is in the surround lighting of same illumination, light passes this first translucent element 245 respectively, this second translucent element 246, the 3rd translucent element 247, the 4th translucent element 248 shines this first photo-sensitive cell 260 with this second substrate 24, this second photo-sensitive cell 262, the 3rd photo-sensitive cell 264, the 4th photo-sensitive cell 266 and the 5th photo-sensitive cell 267 makes this first photo-sensitive cell 260, this second photo-sensitive cell 262, the 3rd photo-sensitive cell 264, the quantity of illumination that the 4th photo-sensitive cell 266 and the 5th photo-sensitive cell 267 are accepted increases progressively successively.Each photo-sensitive cell and corresponding translucent element constitute a photosensitive unit.
This viewing area 25 comprises a plurality of be used to the control amorphous silicon film transistor (figure does not show) of picture demonstration and the chromatic filter layers (figure do not show) corresponding with it, it is arranged at this first substrate 23 and these second substrate, 24 surfaces respectively, and forms with the photo-sensitive cell and the translucent element of this viewing area 25 respectively.
See also Fig. 3 and Fig. 4, Fig. 3 is the electrical block diagram of photosensitive device 20 shown in Figure 2, and Fig. 4 is the block scheme of the control circuit of this liquid crystal indicator.The drain electrode of this first photo-sensitive cell 260, this second photo-sensitive cell 262, the 3rd photo-sensitive cell 264, the 4th photo-sensitive cell 266 and the 5th photo-sensitive cell 267 links together and through one first resistance, 268 ground connection, gets final product measuring light voltage Vp from this public drain electrode.This compensating element, 27 is used to produce a contrast reference value.The grid of this compensating element, 27 and source electrode are connected to a fixing grid voltage Vg and a fixing source voltage Vs respectively, and it drains through one second resistance, 269 ground connection.This compensating element, 27 is under the effect of this grid voltage Vg, between its source electrode and drain electrode, produce a conducting channel, the electronics that this source voltage drives in this conducting channel produces electric current towards this drain electrode campaign, and electric current is through this second resistance 269 and at this this reference voltage of drain electrode output Vr.The resistance value of this second resistance 269 equals the resistance value of this first resistance 268.
This control circuit 28 comprises a processing unit 280 and a brightness adjusting unit 288.This processing unit 280 comprises a differential amplifier 281, an A/D converter 282, a microprocessor 284 and a storage unit 286.Two input ends of this differential amplifier 281 receive photovoltage Vp and reference voltage Vr respectively, and export the difference voltage Δ V (not indicating) of this photovoltage Vp and reference voltage Vr.This A/D converter is converted to digital signal corresponding with this difference voltage Δ V.
This storage unit 286 is ROM (read-only memory), and it stores one first look-up table, a second look-up table and one the 3rd look-up table.This first look-up table is set up the digital signal of its photovoltage Vp correspondence and the relation between ambient light for each photo-sensitive cell.This second look-up table is set up the corresponding relation between ambient light scope and switching signal, and this switching signal is selected to drive and the corresponding photo-sensitive cell of this ambient light scope.The first illuminance scope, the second illuminance scope, the 3rd illuminance scope, the 4th illuminance scope and the 5th illuminance scope that this first photo-sensitive cell 260, this second photo-sensitive cell 262, the 3rd photo-sensitive cell 264, the 4th photo-sensitive cell 266 and the corresponding respectively illumination of the 5th photo-sensitive cell 267 are successively decreased successively, but these five ambient light scopes are successively continuously and constitute the sensing range of this light sensing circuit.As, but the ambient light scope of setting sensing is lux, 1 lux (Lux)-100000, then the first illuminance scope, the second illuminance scope, the 3rd illuminance scope, the 4th illuminance scope and the 5th illuminance scope is divided into lux, 20001 luxs-100000, lux, 2001 luxs-20000, lux, 501 luxs-2000, lux, 11 luxs-500 and lux, 1 lux-10 respectively.The 3rd look-up table is set up the relation between ambient light and display brightness conditioning signal.
This microprocessor 284 is searched ambient light that should digital signal according to the digital signal of its reception and this first look-up table, and judge ambient light scope under it according to this ambient light, search and export corresponding switching signal at this second look-up table again, close other photo-sensitive cell to drive a photo-sensitive cell corresponding with the ambient light scope.Wherein, this switching signal comprises the one first switching signal Vc1 and the second switching signal Vc2, wherein, Vc1 is the Serial No. that this microprocessor 284 exports these five photo-sensitive cell grids to, as " 10000 ", be expressed as this first photo-sensitive cell 260 gate drive voltage is provided, the second switching signal Vc2 exports the source electrode of the Serial No. identical with the first switching signal Vc1 to these five photo-sensitive cells, expression is exported sensing signal to drive this first photo-sensitive cell 260 simultaneously for this first photo-sensitive cell 260 provides source drive voltage under the surround lighting irradiation.
In the time of in ambient light belongs to the strongest first environment illuminance scope of illumination, the high level that the first switching signal Vc1 of this microprocessor 284 outputs equates with grid voltage Vg through level conversion after-applied makes generation one conducting channel between its drain electrode and the source electrode to the grid of this first photo-sensitive cell 260.Can produce light induced electron when accepting rayed because of this first photo-sensitive cell 260, the electron amount in its conducting channel is many with respect to the electron amount in these compensating element, 27 conducting channels, and electron amount increases with illumination illumination.Simultaneously, the high level that the second switching signal Vc2 of this microprocessor 284 outputs equates with source voltage Vs through level conversion after-applied is to the source electrode of this first photo-sensitive cell 260, to drive electronics in this conducting channel to this drain electrode campaign and form photocurrent, because of the electronics in the conducting channel more, the drain current that its photocurrent is produced greater than this compensating element, 27, thereby greater than this reference voltage Vr, the difference DELTA V of this photovoltage Vp and this reference voltage Vr increases with illumination illumination through the photovoltage Vp of this first resistance 268 outputs.
Because these a plurality of photo-sensitive cells are respectively at the photovoltage that is actuated to export corresponding surround lighting in the different ambient light scopes, promptly this processing unit 280 can select to drive different photo-sensitive cells with the variation of ambient light, thereby can to a certain degree avoid single photo-sensitive cell to accept to drive for a long time under illumination.In addition; because this first photo-sensitive cell 260 is to should the first minimum translucent element 245 of transmittance; when ambient lighting is incident upon this first photo-sensitive cell 260; because of this first translucent element 245 only allows 20 percent the quantity of illumination pass through; thereby the illumination illumination that this first photo-sensitive cell 260 is accepted reduces largely; protecting this first photo-sensitive cell 260 not to be subjected to strong illumination, thereby the probability that this first photo-sensitive cell 260 produces the inner structure defectives reduces, and its stability better.At this moment, other photo-sensitive cell is because of being in closed condition, and its probability that produces the inner structure defective also can reduce.
When ambient light belongs to the second illuminance scope respectively, the 3rd illuminance scope, when the 4th illuminance scope and the 5th illuminance scope, then microprocessor 284 drives this second photo-sensitive cell 262 respectively, the 3rd photo-sensitive cell 264, the 4th photo-sensitive cell 266 and the 5th photo-sensitive cell 267, i.e. this first photo-sensitive cell 260, this second photo-sensitive cell 262, the 3rd photo-sensitive cell 264, the 4th photo-sensitive cell 266 and the 5th photo-sensitive cell 267 are responsible for lux, sensing 20001 luxs-100000 respectively, lux, 2001 luxs-20000, lux, 501 luxs-2000, the surround lighting of lux, 11 luxs-500 and lux, 1 lux-10 illumination range.So, can avoid each photo-sensitive cell to accept the excessive surround lighting irradiation of illumination, and when ambient light is more weak, drive the higher pairing photo-sensitive cell of translucent element of transmittance, can guarantee that enough quantities of illumination see through this translucent element and shine this photo-sensitive cell, make it can produce the photovoltage of being convenient to discern.
This microprocessor 284 is exported the display brightness conditioning signal of a corresponding ambient light to this brightness adjusting unit 288 according to this ambient light and the 3rd look-up table.This brightness adjusting unit 288 is regulons backlight, and it is according to this display brightness conditioning signal, by regulating mode such as backlight illumination the display frame of this viewing area 25 is adjusted to the brightness that adapts with surround lighting.
When the first switching signal Vc1 that exports in continuous predetermined a plurality of cycle when this microprocessor 284 does not all change, can think that this liquid crystal indicator 2 is in the more stable environment of an illuminance.At this moment, these microprocessor 284 batch (-type)s drive this photo-sensitive cell and change until the first switching signal Vc1, a pairing photo-sensitive cell is driven continuously for a long time when avoiding this liquid crystal indicator 2 to be in the environment of a certain illuminance scope for a long time, thereby further avoids photo-sensitive cell because of being driven the inner structure defective that is produced for a long time.
The optical sensor of liquid crystal indicator 2 tool switchable types of the present invention, in varying environment illuminance scope, drive different photo-sensitive cells by this microprocessor 284, can to a certain degree avoid single photo-sensitive cell to descend for a long time to be driven in rayed, thereby reduce the probability that photo-sensitive cell produces the inner structure defective, improve the stability of this photosensitive device, thereby make that the reliability of this liquid crystal indicator 2 is higher.In addition, because of surround lighting drives the photo-sensitive cell that is positioned under the lower translucent element of transmittance when strong, make photo-sensitive cell accept the surround lighting irradiation of suitable illumination, and regulate the display brightness of this viewing area 25 according to the photovoltage of this photo-sensitive cell output, avoid shining the inner structure defective that is produced because of accepting stronger surround lighting as the amorphous silicon film transistor of photo-sensitive cell, improve the stability of this amorphous silicon film transistor as photo-sensitive cell, so higher according to liquid crystal indicator 2 reliabilities of the Signal Regulation display brightness of this optical sensor output.
Seeing also Fig. 5, is the synoptic diagram of liquid crystal indicator second embodiment of the present invention.This liquid crystal indicator 3 is roughly the same with liquid crystal indicator 2, and its key distinction is: this framework 32 is accommodated this viewing area 35, and this photosensitive device 30 is arranged on this framework 32, and this viewing area 35 and this photosensitive device 30 are separate formation.
Seeing also Fig. 6, is the synoptic diagram of the photo-sensitive cell of liquid crystal indicator the 3rd embodiment of the present invention.This liquid crystal indicator and liquid crystal indicator 2 are roughly the same, and its difference is: each photo-sensitive cell is respectively by n
2Individual amorphous silicon film transistor is formed, wherein n=2,3,4 ...This n
2Individual amorphous silicon film transistor is equally divided into the n group, the source electrode of the amorphous silicon film transistor of the n in each group links to each other successively with drain electrode and forms cascaded structure, and keep an independent source electrode and an independent drain electrode, the independent drain electrode of each group links to each other becomes the first-class drain D of imitating, the independent source electrode of each group is connected to an equivalent source S, this n
2The grid of individual amorphous silicon film transistor is connected to become an equivalent grid G.Fig. 6 is with n=2, promptly four (2
2) amorphous silicon film transistor is example.This equivalence grid G, this equivalence source S and should the equivalence drain D be grid, source electrode and the drain electrode of this equivalence amorphous silicon film transistor, itself and single amorphous silicon film transistor characteristic are basic identical, and because its series and parallel structure makes between each amorphous silicon film transistor and pins down mutually, this disappears that longly produces neutralization because of property difference that concrete structure and processing procedure produced between the single amorphous silicon film transistor, make that property difference is less between each equivalent amorphous silicon film transistor of producing in batches, thereby make that its production is preferable.
Yet, it is described that the present invention is not limited to above-mentioned embodiment, also can not comprise this compensating element, 27 and this differential amplifier 281 as this liquid crystal indicator 2, and by the default Vr of this storage unit 286 storages one, and by this microprocessor 284 this Vr and be converted to the Vp of digital signal relatively; This first switching signal Vc1 also can be applied to the grid of this photo-sensitive cell by the voltage that an on-off element will equate with this compensating element, 27 grid voltage Vg, for example, by the unlatching of controlling a thin film transistor (TFT) source voltage of thin film transistor (TFT) is transferred to the grid of this photo-sensitive cell that links to each other with its drain electrode; This first resistance 268 and this second resistance 269 are also replaceable to be an amorphous silicon film transistor.
Claims (10)
1. liquid crystal indicator, it comprises a photosensitive device, a processing unit and a brightness adjusting unit, it is characterized in that: this photosensitive device comprises at least two photosensitive units, this processing unit is selected to drive with the corresponding photosensitive unit of ambient light scope and is closed other photosensitive units, make this photosensitive unit export a sensing signal, this processing unit is according to corresponding output one brightness regulated signal of this sensing signal, and this brightness adjusting unit is regulated the display brightness of this liquid crystal indicator according to this brightness regulated signal.
2. liquid crystal indicator as claimed in claim 1 is characterized in that: the quantity of illumination that these at least two photosensitive units are accepted under same ambient light is different.
3. liquid crystal indicator as claimed in claim 2 is characterized in that: each photosensitive unit comprises a photo-sensitive cell respectively and to a translucent element that should photo-sensitive cell, surround lighting sees through this translucent element and shines this photo-sensitive cell.
4. liquid crystal indicator as claimed in claim 3 is characterized in that: the transmittance of this translucent element is different.
5. liquid crystal indicator as claimed in claim 4, it is characterized in that: place respectively when this liquid crystal indicator among the surround lighting of two different illumination, and when these two different ambient lights belong to different default ambient light scope respectively, this processing unit selects to drive one of them photo-sensitive cell respectively, and a photo-sensitive cell of selected driving when strong ambient light corresponding translucent element transmittance than another photo-sensitive cell the transmittance of corresponding translucent element low.
6. liquid crystal indicator as claimed in claim 3 is characterized in that: this photo-sensitive cell is the amorphous silicon membrane transistor.
7. liquid crystal indicator as claimed in claim 6, it is characterized in that: the drain electrode of these at least two photo-sensitive cells interconnects and through a resistance eutral grounding, and in its this sensing signal of drain electrode output, this processing unit output drive signal is to the grid and the source electrode of this photo-sensitive cell.
8. liquid crystal indicator as claimed in claim 3 is characterized in that: each photo-sensitive cell is by n
2Individual amorphous silicon film transistor is formed, wherein this n
2Individual amorphous silicon film transistor is divided into the n group, the drain electrode of the n of each a group amorphous silicon film transistor links to each other successively with source electrode, and keep a free source electrode and and freely drain, and the free source electrode of each group is connected to become an equivalent source electrode respectively, freely draining of each group is connected to become an equivalence drain electrode respectively.
9. the display lightness regulating method of a liquid crystal indicator, use the liquid crystal indicator of this display lightness regulating method to comprise a photosensitive device, a processing unit and a brightness adjusting unit, this photosensitive device comprises at least two photosensitive units, this brightness adjusting method comprises the steps: that this processing unit is selected to drive with the corresponding photosensitive unit of ambient light scope and closes other photosensitive units, makes this photosensitive unit export a sensing signal; This processing unit is according to corresponding output one brightness regulated signal of this sensing signal; This brightness adjusting unit is regulated the display brightness of this liquid crystal indicator according to this brightness regulated signal.
10. the display lightness regulating method of liquid crystal indicator as claimed in claim 9, it is characterized in that: the quantity of illumination that these at least two photosensitive units are accepted under same ambient light is different.
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| KR101356370B1 (en) | 2009-07-31 | 2014-01-27 | 엘지디스플레이 주식회사 | Method of Correcting Data And Liquid Crystal Display Using The Same |
| CN103175527A (en) * | 2013-03-08 | 2013-06-26 | 浙江大学 | Large-visual-field and low-power-consumption earth sensor system applied to microsatellite |
| CN104347036B (en) * | 2013-08-08 | 2017-12-26 | 联想(北京)有限公司 | A kind of information processing method and electronic equipment |
| CN103531174B (en) * | 2013-10-29 | 2017-12-08 | 京东方科技集团股份有限公司 | Brightness adjusting device and method |
| CN107316624B (en) * | 2017-07-17 | 2019-12-03 | 京东方科技集团股份有限公司 | The method of adjustment of display device and its display brightness |
| CN108597455B (en) * | 2018-03-28 | 2021-05-28 | 昆山龙腾光电股份有限公司 | Threshold value burning device and method and threshold value burning system and method |
| CN111123513A (en) * | 2018-09-18 | 2020-05-08 | 武汉美讯半导体有限公司 | Intelligent display device |
| CN109637467B (en) * | 2019-02-19 | 2020-10-30 | 昆山龙腾光电股份有限公司 | Display panel and liquid crystal display device |
| CN113253494B (en) * | 2021-05-19 | 2022-01-14 | 惠科股份有限公司 | Detection device and detection method for liquid crystal display assembly |
| CN113984201B (en) * | 2021-11-03 | 2023-06-27 | 武汉华星光电技术有限公司 | Ambient light sensing structure and display panel |
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| CN1831590A (en) * | 2005-03-08 | 2006-09-13 | 三星电子株式会社 | Thin film panel and liquid crystal display having same |
| CN1894567A (en) * | 2003-12-15 | 2007-01-10 | 伊斯曼柯达公司 | Ambient light detection circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1894567A (en) * | 2003-12-15 | 2007-01-10 | 伊斯曼柯达公司 | Ambient light detection circuit |
| CN1831590A (en) * | 2005-03-08 | 2006-09-13 | 三星电子株式会社 | Thin film panel and liquid crystal display having same |
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