CN101881915A - Liquid crystal display panel, display, light detection device and light intensity regulation method - Google Patents
Liquid crystal display panel, display, light detection device and light intensity regulation method Download PDFInfo
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Abstract
The invention discloses a liquid crystal display panel, a display, a light detection device and a light intensity regulation method. The liquid crystal display panel comprises a plurality of first scanning wires, a plurality of first data wires, a plurality of first thin film transistors, a plurality of liquid crystal pixel units and built-in light detection module groups, wherein the first thin film transistors are respectively positioned at crossed parts of the first scanning wires and the first data wires, each first thin film transistor is connected with the first data wire and the first scanning wire, each first thin film transistor is used for driving the liquid crystal pixel unit, and the built-in light detection module groups detect light rays and output multiple bits of digital signals corresponding to the light intensity of the light rays.
Description
Technical field
The present invention relates to a kind of display panels, liquid crystal indicator, light detection device and light intensity regulation method, especially, relate to a kind of probe source and export display panels, liquid crystal indicator, light detection device and the light intensity regulation method of multistation digital signal of the light intensity of corresponding light source.
Background technology
Environment light source induction technology (Ambient Light Sensing, ALS) be used to improve the energy management efficient of display device, improve the quality of viewing and admiring of TV, screen, digital frame (Digital Photo-Frame (DPF)), notebook computer, mobile phone, personal navigation apparatus and media player etc., make electrical source consumption reduce and prolong the serviceable life of battery.For example,, therefore regulate backlight illumination, just can reach intelligent control and reduce power consumption by automatic acquisition environment light and according to the change of surround lighting because backlight liquid crystal display fluorescent lifetime consumption electric power of a specified duration more is just big more.
Automatically the characteristics of induced environment light regime are to adjust bright or dark excessively screen automatically according to the light source characteristic data that can set, and then reduce the consumption of electric current and the service time of prolongation battery, particularly improve the power-efficient of portable electron device, and make the user can clearly watch screen.In the prior art, make display device have the surround lighting inducing function, extra inductor module must be arranged on the display device.This practice causes number of parts and cost to increase, and display device is miniaturization effectively, slimming also.
Traditional environment light source inductor is produced photocurrent by photodiode (Photodiode) by optical excitation, pass through amplifying circuit (Amplifier) again with its gain amplifier (Gain) but to opereating specification, after analog-digital converter (Analog-to-digital converter (ADC)) calculating, control signal is delivered to backlight controller (Backlight Controller), thereby adjusts light.
Yet, the conventional light source inductor all can produce dark current (Dark Current) thereby influence signal noise ratio (S/N Ratio), its influence is the most obvious when incident light very weak (Low lux Levels), it is bigger that the while dark current varies with temperature fluctuation, when at high temperature using, signal noise ratio is low.Therefore in order to read the signal of this type of high sensitivity light source inductor effectively, must use complicated amplification and the design of ADC change-over circuit, for example additionally increase compensating circuit or remove the dark current circuit, this also causes cost to increase.
Summary of the invention
In view of above-mentioned prior art problems, the object of the present invention is to provide a kind of display panels, liquid crystal indicator, light detection device and light intensity regulation method, make the problem that signal noise ratio is not high to solve in the prior art because of dark current and temperature variation.
According to one object of the present invention, a kind of display panels is proposed, comprising: many first sweep traces, many first data lines, a plurality of the first film transistor, a plurality of liquid crystal pixel cells and in-building type photodetection modules.Described a plurality of the first film transistor lays respectively at described many first sweep traces and described many first data line intersections, and each the first film transistor AND gate first data line and first sweep trace are connected.Each the first film transistor is used to drive liquid crystal pixel cells.In-building type photodetection module probing light is also exported the multistation digital signal of the light intensity of corresponding light.
In-building type photodetection module comprises at least one the second sweep traces, at least one the second data line and a plurality of photo detecting units.Each photo detecting unit has second thin film transistor (TFT), at least one storage capacitors and at least one photo-sensitive cell.Second thin film transistor (TFT), storage capacitors and photo-sensitive cell are for being electrically connected.Each second thin film transistor (TFT) is connected with second sweep trace and second data line.
In-building type photodetection module comprises: second sweep trace, many articles the 3rd scanning linears, second data line, the 3rd data line and a plurality of photo detecting units.Each photo detecting unit has second thin film transistor (TFT), the 3rd thin film transistor (TFT), at least one storage capacitors and at least one photo-sensitive cell.Second thin film transistor (TFT), the 3rd thin film transistor (TFT), storage capacitors and photo-sensitive cell are for being electrically connected.Each second thin film transistor (TFT) is connected with second sweep trace and second data line.Each the 3rd thin film transistor (TFT) is connected with every three scan line and the 3rd data line respectively.
The storage capacitors of a plurality of photo detecting units has different capacitances.
The quantity difference of the storage capacitors of a plurality of photo detecting units.
The photo-sensitive cell of a plurality of photo detecting units has different photoinduction areas.
The quantity difference of the photo-sensitive cell of a plurality of photo detecting units.
Display panels also comprises colored filter, and colored filter is arranged on described a plurality of the first film transistor and the described a plurality of photo detecting unit, colored filter has the different transparent aperture of a plurality of sizes (transparent aperture), the respectively corresponding described a plurality of photo detecting units in the position in described a plurality of transparent apertures.
According to another object of the present invention, a kind of liquid crystal indicator is proposed, it comprises display panels, first grid driving circuit, data drive circuit, photodetection driving circuit and counting circuit.The first grid driving circuit is in order to export first control signal bar first sweep trace at the most.Data drive circuit is in order to export video data bar first data line at the most.The photodetection driving circuit is coupled to in-building type photodetection module, second controls signal to in-building type photodetection module to export at least one, and reads multistation digital signal from in-building type photodetection module.Counting circuit is coupled to the photodetection driving circuit, in order to receive and to calculate multistation digital signal to obtain the light intensity of light.
Second control signal comprises that data write activation pulse (pulse) and data read activation pulse.
When the number of second control signal when being a plurality of, a plurality of data read activation pulses are asynchronous.
Liquid crystal indicator also comprises module backlight, and counting circuit is coupled to module backlight and controls module backlight according to the light intensity of resulting light.
According to another purpose of the present invention, a kind of light detection device is proposed, be used for probing light and export the multistation digital signal of the light intensity of corresponding light, described light detection device comprises a plurality of photo detecting units and photodetection driving circuit.Each photo detecting unit comprises transistor, at least one storage capacitors and at least one photo-sensitive cell, and transistor, storage capacitors and photo-sensitive cell are for being electrically connected.The photodetection driving circuit is exported at least one control signal and reference signal to a plurality of transistors, and control signal comprises that data write activation pulse and data read activation pulse.When a plurality of transistors reception data write the activation pulse, at least one storage capacitors of each photo detecting unit was charged according to reference signal.When described a plurality of transistors received data read activation pulse, the photodetection driving circuit read the magnitude of voltage of at least one storage capacitors of each photo detecting unit, and produced multistation digital signal according to a plurality of magnitudes of voltage.
In addition, the present invention also proposes a kind of light intensity regulation method, is used for liquid crystal indicator, and described method comprises the following steps: at first to provide display panels; Then, utilize the first grid driving circuit to export first control signal bar first sweep trace at the most; Utilize data drive circuit output video data bar first data line at the most; The photodetection driving circuit is coupled to in-building type photodetection module; Utilize the photodetection driving circuit to export at least one and second control signal to in-building type photodetection module.Read multistation digital signal by in-building type photodetection module.With counting circuit and the coupling of photodetection driving circuit, thereby to receive and to calculate the light intensity that multistation digital signal obtains light.
Counting circuit is coupled to module backlight, controls module backlight according to the light intensity of acquisition light.
In addition, the present invention also proposes a kind of light intensity regulation method, be used for light detection device, the light detection device probing light is also exported the multistation digital signal of the light intensity of corresponding light, described method comprises the following steps: to provide a plurality of photo detecting units, each photo detecting unit comprises transistor, at least one storage capacitors and at least one photo-sensitive cell, and transistor, storage capacitors and photo-sensitive cell are for being electrically connected.Utilize the photodetection driving circuit to export at least one control signal and reference signal to a plurality of transistors, control signal has data and writes activation pulse and data read activation pulse.When a plurality of transistors reception data write the activation pulse, at least one storage capacitors of each photo detecting unit was charged according to reference signal.When described a plurality of transistors received data read activation pulse, the photodetection driving circuit read the magnitude of voltage of at least one storage capacitors of each photo detecting unit, and produced multistation digital signal according to a plurality of magnitudes of voltage.
As mentioned above, can have one or more following advantages according to display panels of the present invention, liquid crystal indicator, light detection device and light intensity regulation method:
(1) the detectable light of described display panels, liquid crystal indicator, light detection device and light intensity regulation method and export the multistation digital signal of the light intensity of corresponding light.
(2) described display panels, liquid crystal indicator, light detection device and light intensity regulation method are can be with photo detecting unit directly embedded and be integrated in the panel of liquid crystal or Organic Light Emitting Diode, according to different photo detecting unit leakage currents and storage capacitors, can learn the intensity of external light source.
(3) described display panels, liquid crystal indicator, light detection device and light intensity regulation method do not need to add light source induction printed circuit board (PCB) and change structural design, integrated optical sensor display device has reduced component count, design complexity and cost are all decreased, and the expedite product exploitation.
(4) described display panels, liquid crystal indicator, light detection device and light intensity regulation method have the advantage of easily customized, frivolous, narrow frame (Narrow Bezel) and environmental protection.
Described light detection device structure is not limited to display panels and liquid crystal indicator, every display panel and display device with active-matrix (Active Matrix), light detection device structure as described in all can using as the display panel of active-matrix formula Organic Light Emitting Diode (Active Matrix Organic Light Emitting Diode (AMOLED)) and active-matrix formula Electronic Paper (Active Matrix Electronic Paper Display (AMEPD)) and display device.
Description of drawings
Fig. 1 is the synoptic diagram of first embodiment of display panels of the present invention;
Fig. 2 is the synoptic diagram of second embodiment of display panels of the present invention;
Fig. 3 is the synoptic diagram of the 3rd embodiment of display panels of the present invention;
Fig. 4 is the circuit layout synoptic diagram of display panels of the present invention;
Fig. 5 is the synoptic diagram of the colored filter of display panels of the present invention;
Fig. 6 is the synoptic diagram of the 4th embodiment of display panels of the present invention;
Fig. 7 is the synoptic diagram of the 5th embodiment of display panels of the present invention;
Fig. 8 is the synoptic diagram of the 6th embodiment of display panels of the present invention;
Fig. 9 is the synoptic diagram of the 7th embodiment of display panels of the present invention;
Figure 10 is the synoptic diagram of first embodiment of liquid crystal indicator of the present invention;
Figure 11 is the signal frequency figure of first embodiment of liquid crystal indicator of the present invention;
Figure 12 a is the signal frequency figure of second embodiment of liquid crystal indicator of the present invention;
Figure 12 b is the ambient lighting radio signal graph of phototransistor photo-sensitive cell embodiment;
Figure 13 is the signal frequency figure of the 3rd embodiment of liquid crystal indicator of the present invention;
Figure 14 is the synoptic diagram of light detection device of the present invention;
Figure 15 is the process flow diagram of first embodiment of light intensity regulation method of the present invention;
Figure 16 is the process flow diagram of second embodiment of light intensity regulation method of the present invention.
The primary clustering label declaration:
1,101,9: display panels;
10: liquid crystal indicator;
102: the first grid driving circuit;
103: data drive circuit;
104,142: the photodetection driving circuit;
105: counting circuit;
107: module backlight;
11,91,1021: the first sweep traces;
12,92,1031: the first data lines;
13,41,71,81,93,1411: the first film transistor;
14,72,82,94: liquid crystal pixel cells;
15,73,83,95,106: in-building type photodetection module;
151,1511-1514,951: the second sweep traces;
152,953: the second data lines;
153,42,955,141: photo detecting unit;
1531,9551: the second thin film transistor (TFT)s;
1532,9553,1412: storage capacitors;
1533,75,85,9554,1413: photo-sensitive cell;
51,74,84: colored filter;
511: transparent aperture;
721,821: pixel electrode;
722,822: public electrode;
723,823: liquid crystal molecule;
952,9521-9524: three scan line;
954: the three data lines;
9552: the three thin film transistor (TFT)s;
S1-S8, S11-S12: step.
Embodiment
With reference to Fig. 1, Fig. 1 is the synoptic diagram of display panels first embodiment of the present invention.Among Fig. 1, display panels 1 comprises many first sweep traces 11, many first data lines 12, a plurality of the first film transistor 13, a plurality of liquid crystal pixel cells 14 and in-building type photodetection modules 15.A plurality of the first film transistors 13 lay respectively at many first sweep traces 11 and many first data line 12 intersections, and each the first film transistor 13 is connected with first data line 12 with first sweep trace 11.Each the first film transistor 13 is used to drive liquid crystal pixel cells 14.In-building type photodetection module 15 probing lights are also exported the multistation digital signal of the light intensity of corresponding light.
In-building type photodetection module 15 comprises at least one the second sweep traces 151, at least one the second data line 152 and a plurality of photo detecting units 153.Each photo detecting unit 153 has second thin film transistor (TFT) 1531, at least one storage capacitors 1532 and at least one photo-sensitive cell 1533, the second thin film transistor (TFT)s 1531, storage capacitors 1532 and photo-sensitive cell 1533 for being electrically connected.Each second thin film transistor (TFT) 1531 is connected with second sweep trace 151 and second data line 152.When second sweep trace 151 was many, a plurality of second thin film transistor (TFT)s 1531 were connected with every second sweep trace 151 and second data line 152 respectively.In addition, second data line 152 also can be many, and at this moment, a plurality of second thin film transistor (TFT)s 1531 are connected with second sweep trace 151 and every second data line 152 respectively.
With reference to Fig. 2, Fig. 2 is the synoptic diagram of second embodiment of display panels of the present invention.The quantity of the storage capacitors 1532 of a plurality of photo detecting units 153 can be different, also can utilize the storage capacitors of a plurality of photo detecting units 153 to have different capacitances, reach same effect.
With reference to Fig. 3, Fig. 3 is the synoptic diagram of the 3rd embodiment of display panels of the present invention.The quantity of the photo-sensitive cell 1533 of a plurality of photo detecting units 153 can be different, also can utilize the photo-sensitive cell 1533 of a plurality of photo detecting units 153 to have different photoinduction areas, reach same effect.Photo-sensitive cell 1533 can be phototransistor (Photo Transistor) or photodiode.
With reference to Fig. 4, Fig. 4 is the circuit layout synoptic diagram of display panels of the present invention.Among Fig. 4, display panels has a plurality of the first film transistors 41 and a plurality of photo detecting unit 42.With reference to Fig. 5, Fig. 5 is the synoptic diagram of the colored filter of display panels of the present invention.Among Fig. 5, colored filter 51 has the different transparent aperture 511 of a plurality of sizes.Utilize the transparent aperture of different size to make different photo detecting units 42 that different exposure areas be arranged.With reference to Fig. 6, Fig. 6 is the synoptic diagram of the 4th embodiment of display panels of the present invention.Display panels also comprises colored filter 51, and colored filter 51 is arranged on a plurality of the first film transistors 41 and a plurality of photo detecting unit 42 the corresponding a plurality of photo detecting units 42 of the position in a plurality of transparent apertures 511 difference.
With reference to Fig. 7, Fig. 7 is the synoptic diagram of the 5th embodiment of display panels of the present invention.Among Fig. 7, present embodiment comprises the first film transistor 71, liquid crystal pixel cells 72, in-building type photodetection module 73 and colored filter 74, and liquid crystal pixel cells 72 comprises pixel electrode 721, public electrode 722 and the liquid crystal molecule 723 between pixel electrode 721 and public electrode 722.Wherein, the photo-sensitive cell 75 of in-building type photodetection module 73 is preferably photodiode.
With reference to Fig. 8, Fig. 8 is the synoptic diagram of the 6th embodiment of display panels of the present invention.Among Fig. 8, present embodiment comprises the first film transistor 81, liquid crystal pixel cells 82, in-building type photodetection module 83 and colored filter 84, and liquid crystal pixel cells 82 comprises pixel electrode 821, public electrode 822 and the liquid crystal molecule 823 between pixel electrode 821 and public electrode 822.The photo-sensitive cell 85 of in-building type photodetection module 83 is a phototransistor.
With reference to Fig. 9, Fig. 9 is the synoptic diagram of the 7th embodiment of display panels of the present invention.Among Fig. 9, display panels 9 comprises many first sweep traces 91, many first data lines 92, a plurality of the first film transistor 93, a plurality of liquid crystal pixel cells 94 and in-building type photodetection modules 95.A plurality of the first film transistors 93 lay respectively at the intersection of many first sweep traces 91 and many first data lines 92, and each the first film transistor 93 is connected with first sweep trace 91 and first data line 92.Each the first film transistor 93 is used to drive liquid crystal pixel cells 94.In-building type photodetection module 95 probing lights are also exported the multistation digital signal of the light intensity of corresponding light.
In-building type photodetection module 95 comprises second sweep trace 951, many articles of three scan lines 952, second data line 953, the 3rd data line 954 and a plurality of photo detecting units 955.Each photo detecting unit 955 has second thin film transistor (TFT) 9551, the 3rd thin film transistor (TFT) 9552, at least one storage capacitors 9553 and at least one photo-sensitive cell 9554, and second thin film transistor (TFT) 9551, the 3rd thin film transistor (TFT) 9552, storage capacitors 9553 and photo-sensitive cell 9554 are for being electrically connected.Each second thin film transistor (TFT) 9551 is connected with second sweep trace 951 and second data line 953 respectively, and each the 3rd thin film transistor (TFT) 9552 links to each other with every three scan line 952 and the 3rd data line 954 respectively.
The quantity of the storage capacitors 9553 of a plurality of photo detecting units 955 can be different, also can utilize the storage capacitors 9553 of a plurality of photo detecting units 955 to have different capacitances, to reach same effect.The quantity of the photo-sensitive cell 9554 of a plurality of photo detecting units 955 can be different, also can utilize the photo-sensitive cell 9554 of a plurality of photo detecting units 955 to have different photoinduction areas, reach same effect.Photo-sensitive cell 9554 can be phototransistor or photodiode.Display panels 9 also comprises colored filter, and colored filter has the different transparent aperture of a plurality of sizes, and the position in described a plurality of transparent apertures is corresponding a plurality of photo detecting units 955 respectively.
With reference to Figure 10, Figure 10 is the synoptic diagram of first embodiment of liquid crystal indicator of the present invention.Among Figure 10, liquid crystal indicator 10 comprises display panels 101, first grid driving circuit 102, data drive circuit 103, photodetection driving circuit 104 and counting circuit 105.First grid driving circuit 102 is used to export first control signal bar first sweep trace 1021 at the most.Data drive circuit 103 is used to export video data bar first data line 1031 at the most.Photodetection driving circuit 104 is coupled to in-building type photodetection module 106, and photodetection driving circuit 104 is used to export at least one and second controls signal to in-building type photodetection module 106, and reads multistation digital signal from in-building type photodetection module 106.Counting circuit 105 is coupled to photodetection driving circuit 104, is used to receive and calculate multistation digital signal to obtain the light intensity of light.When liquid crystal indicator 10 also comprised module 107 backlight, counting circuit 105 was coupled to module 107 backlight, and counting circuit 105 is controlled module 107 backlight according to the light intensity of the light that obtains.
With reference to Figure 11, Figure 11 is the signal frequency figure of first embodiment of liquid crystal indicator of the present invention.With reference to Figure 10, at N period (time frame), the first grid driving circuit 102 outputs first control signal bar first sweep trace G1-Gn is at the most opened the thin film transistor (TFT) that each is positioned at first data line 1031 and first sweep trace, 1021 intersections with order, and first control signal is a n pulse signal.At this moment, data drive circuit 103 output video datas are the bar first data line D1-Dm at the most, to upgrade the liquid crystal panel picture displayed.Then, in N+1 period process, first grid driving circuit 102 orders are exported n pulse signal, and export many first sweep trace G1-Gn to open the thin film transistor (TFT) that each is positioned at first data line 1031 and first sweep trace, 1021 intersections in proper order.At this moment, data drive circuit 103 output video datas are the bar first data line D1-Dm at the most, to upgrade the liquid crystal panel picture displayed.Then, in N+2 period process, first grid driving circuit 102 order is once more exported n pulse signal, and exports many first sweep trace G1-Gn to open the thin film transistor (TFT) that each is positioned at first data line 1031 and first sweep trace, 1021 intersections in proper order.At this moment, data drive circuit 103 output video datas are the bar first data line D1-Dm at the most, to upgrade the liquid crystal panel picture displayed once more.Then, in N+3 period process, first grid driving circuit 102 order is once more exported n pulse signal, and exports many first sweep trace G1-Gn to open the thin film transistor (TFT) that each is positioned at first data line 1031 and first sweep trace, 1021 intersections in proper order.At this moment, data drive circuit 103 output video datas are the bar first data line D1-Dm at the most, to upgrade the liquid crystal panel picture displayed once more.
With reference to Figure 12 a, Figure 12 a is the second embodiment signal frequency figure of liquid crystal indicator of the present invention.With reference to Fig. 1 and Figure 10, when the elements reference data were provided, at least one second controlled signal to in-building type photodetection module 15,106 photodetection driving circuit 104 output, and wherein second control signal comprises that data write activation pulse and data read activation pulse.When a plurality of transistors 1531 reception data write the activation pulse, at least one storage capacitors 1532 of each photo detecting unit 153 is charged according to reference signal, open each second thin film transistor (TFT) 1531 by at least one the second sweep traces 151, reference data also writes storage capacitors 1532 simultaneously.
By the time be t
1-t
4The irradiation of external environment light, storage capacitors 1532 is by Photosensing Units 1533 discharges.When thin film transistor (TFT) T1-T4 received data read activation pulse, photodetection driving circuit 104 read the magnitude of voltage of the storage capacitors 1532 of each photo detecting unit 153, and produced multistation digital signal according to magnitude of voltage.As process t
1Time shutter, second sweep trace 1511 is opened thin film transistor (TFT) T4, and the magnitude of voltage of the storage capacitors 1532 that will be connected with thin film transistor (TFT) T4 by second data line 152 is read.As process t
2Time shutter, second sweep trace 1512 is opened thin film transistor (TFT) T3, and the magnitude of voltage of the storage capacitors 1532 that will be connected with thin film transistor (TFT) T3 by second data line 152 is read.As process t
3Time shutter, second sweep trace 1513 is opened thin film transistor (TFT) T2, and the magnitude of voltage of the storage capacitors 1532 that will be connected with thin film transistor (TFT) T2 by second data line 152 is read.As process t
4Time shutter, second sweep trace 1514 is opened thin film transistor (TFT) T1, and the magnitude of voltage of the storage capacitors 1532 that will be connected with thin film transistor (TFT) T1 by second data line 152 reads, and also data read activation pulse meter is shown nonsynchronous state.
With reference to Figure 12 b, Figure 12 b is the ambient lighting radio signal graph of phototransistor photo-sensitive cell embodiment.By the irradiation of external environment light, photo-sensitive cell converts light signal to electric signal.Therefore under certain bias voltage, different environment light intensities can correspondence go out different photoelectricity flow valuves.With the present embodiment is example, and when light intensity was respectively 0lux, 500lux, 1000lux, 5000lux, 10000lux, 50000lux, 100000lux, light intensity was strong more, exportable bigger photoelectricity flow valuve.
With reference to table one, table one is the form of the light modulation degree relation of counting circuit 105 logical design embodiment.Photodetection driving circuit 104 can produce multistation digital signal according to magnitude of voltage.Counting circuit 105 receives and calculates multistation digital signal, can differentiate the degree of light light modulation (Dimming) according to the logic of height.With this embodiment is example, can be pitch-dark (Pitch Black) by the set environment situation, very dark (Very dark), indoor dark (Dark Indoors), indoor darkness (Dim Indoors), indoor normal (Normal Indoors), indoor bright (Bright Indoors), outdoor darkness (Dim Outdoors), outdoor cloudy (Cloudy Outdoors) and sunlight direct projection situations such as (Direct Sunlight), correspondence goes out different range of light intensities, and be foundation with the mean value of range of light intensities, as the degree of light light modulation, for example: (H, H, H, H) be represented as the 0th contrast light, (L, H, H, H) be represented as the 1st contrast light, (L, L, H, H) be represented as the 2nd contrast light, (L, L, L, H) be represented as the 3rd contrast light, (L, L, L L) is represented as the 4th contrast light.When coupled backlights module 107, can control module 107 backlight according to the light intensity of the light that is obtained.For instance, when the detection light intensity is 2000lux, indoor bright environmental aspect in its environmental aspect corresponding tables one, counting circuit can be judged as the 2nd contrast light.When counting circuit 105 coupled backlights modules 107, can adjust the backlight of module 107 backlight according to the calculation rule that is obtained.
The form of the light modulation degree relation of table one counting circuit logical design embodiment
| Environmental aspect | From (lux) | To (lux) | Mean value (lux) | The calculation rule | The light modulation degree |
| Pitch-dark | ??0 | ??10 | ?5 | ??(H，H，H，H) | ??0 |
| Very dark | ??10 | ??50 | ?30 | ??(H，H，H，H) | ??0 |
| Indoor dark | ??50 | ??200 | ?125 | ??(H，H，H，H) | ??0 |
| Environmental aspect | From (lux) | To (lux) | Mean value (lux) | The calculation rule | The light modulation degree |
| Indoor darkness | ??200 | ??400 | ?300 | ??(L，H，H，H) | ??1 |
| Indoor normal | ??400 | ??1000 | ?700 | ??(L，H，H，H) | ??1 |
| Indoor bright | ??1000 | ??5000 | ?3000 | ??(L，L，H，H) | ??2 |
| Indoor darkness | ??5000 | ??10000 | ?7500 | ??(L，L，L，H) | ??3 |
| Outdoor cloudy | ??10000 | ??30000 | ?20000 | ??(L，L，L，H) | ??3 |
| The sunlight direct projection | ??30000 | ??100000 | ?65000 | ??(L，L，L，L) | ??4 |
With reference to Figure 13, Figure 13 is the signal frequency figure of the 3rd embodiment of liquid crystal indicator of the present invention.With reference to Fig. 9 and Figure 10, when the elements reference data were provided, at least one second controlled signal to photodetection driving circuit 104 output in-building type photodetection module 106,95, the second control signals and comprises that data write activation pulse and data read activation pulse.When a plurality of transistor T 1-T4 reception data write the activation pulse, the storage capacitors 9553 of each photo detecting unit 955 is charged according to reference signal, open each second thin film transistor (TFT) 9551 by second sweep trace 951, and simultaneously reference data is write storage capacitors 9553.
By the time be t
1-t
4The irradiation of external environment light, storage capacitors 9553 is by Photosensing Units 9554 discharges.When thin film transistor (TFT) T1-T4 received data read activation pulse, photodetection driving circuit 104 read the magnitude of voltage of the storage capacitors 9553 of each photo detecting unit 955, and produced multistation digital signal according to magnitude of voltage.As process t
1Time shutter, three scan line 9524 is opened thin film transistor (TFT) T8, and the magnitude of voltage of the storage capacitors 9553 that will be connected with thin film transistor (TFT) T8 by the 3rd data line 954 is read.As process t
2Time shutter, three scan line 9523 is opened thin film transistor (TFT) T7, and the magnitude of voltage of the storage capacitors 9553 that will be connected with thin film transistor (TFT) T7 by the 3rd data line 954 is read.As process t
3Time shutter, three scan line 9522 is opened thin film transistor (TFT) T6, and the magnitude of voltage of the storage capacitors 9553 that will be connected with thin film transistor (TFT) T6 by the 3rd data line 954 is read.As process t
4Time shutter, three scan line 9521 is opened thin film transistor (TFT) T5, and the magnitude of voltage of the storage capacitors 9553 that will be connected with thin film transistor (TFT) T5 by the 3rd data line 954 reads, and also data read activation pulse meter is shown nonsynchronous state.
With reference to Figure 14, Figure 14 is the synoptic diagram of light detection device of the present invention.Light detection device is in order to probing light and export the multistation digital signal of the light intensity of corresponding light, and described light detection device comprises a plurality of photo detecting units 141 and photodetection driving circuit 142.Each photo detecting unit 141 comprises transistor 1411, at least one storage capacitors 1412 and at least one photo-sensitive cell 1413, and transistor 1411, storage capacitors 1412 and photo-sensitive cell 1413 are for being electrically connected.Photodetection driving circuit 142 at least one control signal of output and reference signal are to a plurality of transistors 1411, and control signal comprises that data write activation pulse and data read activation pulse.When a plurality of transistors 1411 received data and write the activation pulse, at least one storage capacitors of each photo detecting unit 141 1412 was charged according to reference signal.When a plurality of transistors 1411 received data read activation pulse, photodetection driving circuit 142 read the magnitude of voltage of at least one storage capacitors 1412 of each photo detecting unit 141, and produces multistation digital signal according to a plurality of magnitudes of voltage.When the number of control signal when being a plurality of, it represents that a plurality of data read activation pulses are nonsynchronous state.
The quantity of the storage capacitors 1412 of a plurality of photo detecting units 141 can be different, also can utilize the storage capacitors 1412 of a plurality of photo detecting units 141 to have different capacitances, reach same effect.The quantity of the photo-sensitive cell 1413 of a plurality of photo detecting units 141 can be different, also can utilize the photo-sensitive cell 1413 of a plurality of photo detecting units 141 to have different photoinduction areas, reach same effect.Photo-sensitive cell 1413 can be phototransistor or photodiode.
With reference to Figure 15, Figure 15 is the process flow diagram of first embodiment of light intensity regulation method of the present invention.Light intensity regulation method is used for liquid crystal indicator, said method comprising the steps of: step S1 provides display panels; Step S2 utilizes the first grid driving circuit to export first control signal bar first sweep trace at the most; Step S3 utilizes data drive circuit output video data bar first data line at the most; Step S4 is coupled to in-building type photodetection module with the photodetection driving circuit; Step S5, utilize the photodetection driving circuit to export at least one and second control signal to in-building type photodetection module, second control signal comprises that data write activation pulse and data read activation pulse, when the number of second control signal when being a plurality of, a plurality of data read activation pulses are nonsynchronous state; Step S6 reads multistation digital signal by in-building type photodetection module; Step S7 is coupled to the photodetection driving circuit with counting circuit, to receive and to calculate multistation digital signal to obtain the light intensity of light.Also comprise step S8, counting circuit is coupled to module backlight, control module backlight according to the light intensity of acquisition light.
With reference to Figure 16, Figure 16 is the process flow diagram of second embodiment of light intensity regulation method of the present invention.Be used for light detection device, the light detection device probing light is also exported the multistation digital signal of the light intensity of corresponding light, described method comprises the following steps: step S11, a plurality of photo detecting units are provided, each photo detecting unit comprises transistor, at least one storage capacitors and at least one photo-sensitive cell, and transistor, storage capacitors and photo-sensitive cell are for being electrically connected; Step S12 utilizes the photodetection driving circuit to export at least one control signal and reference signal to a plurality of transistors, and control signal comprises that data write activation pulse and data read activation pulse.When the number of control signal when being a plurality of, control signal represents that a plurality of data read activation pulses are nonsynchronous state.
When a plurality of transistors reception data write the activation pulse, at least one storage capacitors of each photo detecting unit was charged according to reference signal.When a plurality of transistors received data read activation pulse, the photodetection driving circuit read the magnitude of voltage of at least one storage capacitors of each photo detecting unit, and produced multistation digital signal according to a plurality of magnitudes of voltage.
The quantity of the storage capacitors of a plurality of photo detecting units can be different, also can utilize the storage capacitors of a plurality of photo detecting units to have different capacitances, to reach same effect.The quantity of the photo-sensitive cell of a plurality of photo detecting units can be different, also can utilize the photo-sensitive cell of a plurality of photo detecting units to have different photoinduction areas, reach same effect.Sensing component can be phototransistor or photodiode.
The light detection device structure is not limited to display panels, liquid crystal indicator, every display panel, display device with active-matrix (Active Matrix) can be used this light detection device structure as display panel, the display device of active-matrix formula Organic Light Emitting Diode (Active Matrix Organic Light Emitting Diode (AMOLED)), active-matrix formula Electronic Paper (Active Matrix Electronic Paper Display (AMEPD)).
The above only is an illustrative, but not is restricted.Any spirit and category that does not break away from the present invention, and to its equivalent modifications of carrying out or change, all should be contained in the scope of claim.
Claims (18)
1. display panels comprises:
Many first sweep traces;
Many first data lines;
A plurality of the first film transistors lay respectively at described many first data lines and described many first sweep trace intersections, and described first data line of each described the first film transistor AND gate is connected with described first sweep trace;
A plurality of liquid crystal pixel cells, each described the first film transistor is used to drive liquid crystal pixel cells;
In-building type photodetection module, probing light is also exported the multistation digital signal of the light intensity of corresponding described light.
2. display panels as claimed in claim 1, wherein, in-building type photodetection module comprises:
At least one the second sweep traces;
At least one the second data lines;
A plurality of photo detecting units, wherein each described photo detecting unit comprises second thin film transistor (TFT), at least one storage capacitors and at least one photo-sensitive cell, described second thin film transistor (TFT), described storage capacitors and described photo-sensitive cell are for being electrically connected;
Wherein, each described second thin film transistor (TFT) is connected with described second sweep trace and described second data line.
3. display panels as claimed in claim 2, when described second sweep trace was many, a plurality of second thin film transistor (TFT)s were connected with every described second sweep trace and described second data line respectively.
4. display panels as claimed in claim 2, when described second data line was many, a plurality of second thin film transistor (TFT)s were connected with described second sweep trace and every described second data line respectively.
5. display panels as claimed in claim 1, wherein, in-building type photodetection module comprises:
Second sweep trace;
Many articles of three scan lines;
Second data line;
The 3rd data line;
A plurality of photo detecting units, each described photo detecting unit has second thin film transistor (TFT), the 3rd thin film transistor (TFT), at least one storage capacitors and at least one photo-sensitive cell, and described second thin film transistor (TFT), described the 3rd thin film transistor (TFT), described storage capacitors and described photo-sensitive cell are for being electrically connected;
Wherein, each described second thin film transistor (TFT) is connected with described second sweep trace and described second data line respectively, and each described the 3rd thin film transistor (TFT) is connected with every described three scan line and described the 3rd data line respectively.
6. as the described display panels of the arbitrary claim of claim 2 to 5, wherein, the storage capacitors of described a plurality of photo detecting units has different capacitances.
7. as the described display panels of the arbitrary claim of claim 2 to 5, wherein, the quantity difference of the storage capacitors of described a plurality of photo detecting units.
8. as the described display panels of the arbitrary claim of claim 2 to 5, wherein, the photo-sensitive cell of described a plurality of photo detecting units has different photoinduction areas.
9. as the described display panels of the arbitrary claim of claim 2 to 5, wherein, the quantity difference of the photo-sensitive cell of described a plurality of photo detecting units.
10. as the described display panels of the arbitrary claim of claim 2 to 5, also comprise colored filter, and described colored filter is arranged on described a plurality of the first film transistor and the described a plurality of photo detecting unit, described colored filter has the different transparent aperture of a plurality of sizes, and the position in described a plurality of transparent apertures corresponds respectively to described a plurality of photo detecting unit.
11. a liquid crystal indicator comprises:
As the described display panels of the arbitrary claim of claim 1 to 5;
The first grid driving circuit controls signal to described many first sweep traces in order to export first;
Data drive circuit is in order to export video data to described many first data lines;
The photodetection driving circuit is coupled to described in-building type photodetection module, and described photodetection driving circuit second controls signal to described in-building type photodetection module in order to export at least one, and reads described multistation digital signal from described in-building type photodetection module;
Counting circuit is coupled to described photodetection driving circuit, in order to receive and to calculate described multistation digital signal to obtain the light intensity of light.
12. liquid crystal indicator as claimed in claim 11, wherein, described second control signal comprises that data write activation pulse and data read activation pulse.
13. liquid crystal indicator as claimed in claim 11 also comprises module backlight, wherein, described counting circuit is coupled to described module backlight and controls described module backlight according to the light intensity of resulting described light.
14. a light detection device is used for probing light and the output multistation digital signal corresponding to the light intensity of described light, described light detection device comprises:
A plurality of photo detecting units, wherein, each photo detecting unit comprises transistor, at least one storage capacitors and at least one photo-sensitive cell, and described transistor, described storage capacitors and described photo-sensitive cell are for being electrically connected;
The photodetection driving circuit is exported at least one control signal and reference signal to described a plurality of transistors, and described control signal comprises that data write activation pulse and data read activation pulse;
Wherein, when described a plurality of transistors received described data and write the activation pulse, described at least one storage capacitors of each described photo detecting unit was charged according to described reference signal;
When described a plurality of transistors received described data read activation pulse, described photodetection driving circuit read the magnitude of voltage of at least one storage capacitors of each described photo detecting unit, and produced multistation digital signals according to a plurality of magnitudes of voltage.
15. light detection device as claimed in claim 14, wherein, the storage capacitors of described a plurality of photo detecting units has different capacitances.
16. a light intensity regulation method is used for liquid crystal indicator, described method comprises the following steps:
Provide as the described display panels of the arbitrary claim of claim 1 to 5;
Utilize first grid driving circuit output first to control signal to described many first sweep traces;
Utilize data drive circuit output video data to described many first data lines;
The photodetection driving circuit is coupled to described in-building type photodetection module;
Utilize described photodetection driving circuit to export at least one and second control signal to described in-building type photodetection module;
Read described multistation digital signal by described in-building type photodetection module;
Counting circuit is coupled to described photodetection driving circuit, to receive and to calculate described multistation digital signal to obtain the light intensity of described light.
17. light intensity regulation method as claimed in claim 16, wherein, described second control signal comprises that data write activation pulse and data read activation pulse.
18. light intensity regulation method as claimed in claim 16 wherein, is coupled to module backlight with described counting circuit, controls described module backlight according to the light intensity of the described light that is obtained.
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| CN2009101371402A CN101881915A (en) | 2009-05-06 | 2009-05-06 | Liquid crystal display panel, display, light detection device and light intensity regulation method |
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| CN2009101371402A CN101881915A (en) | 2009-05-06 | 2009-05-06 | Liquid crystal display panel, display, light detection device and light intensity regulation method |
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| CN101881915A true CN101881915A (en) | 2010-11-10 |
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| CN103786494A (en) * | 2012-10-30 | 2014-05-14 | 鸿富锦精密工业（深圳）有限公司 | Light-emitting diode blackboard |
| CN104200783A (en) * | 2014-09-24 | 2014-12-10 | 广东欧珀移动通信有限公司 | Method and system for enabling mobile phone to acquire uniform light effect through production line calibration |
| CN105702682A (en) * | 2016-01-25 | 2016-06-22 | 昆山龙腾光电有限公司 | Thin film transistor array substrate, manufacturing method, and liquid crystal display panel |
| CN109375402A (en) * | 2018-11-01 | 2019-02-22 | Oppo广东移动通信有限公司 | Display screen component and electronic equipment |
| WO2019127575A1 (en) * | 2017-12-30 | 2019-07-04 | 深圳信炜科技有限公司 | Photosensitive drive circuit, photosensitive apparatus, and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103786494A (en) * | 2012-10-30 | 2014-05-14 | 鸿富锦精密工业（深圳）有限公司 | Light-emitting diode blackboard |
| CN103786494B (en) * | 2012-10-30 | 2016-10-12 | 鸿富锦精密工业（深圳）有限公司 | Light emitting diode blackboard |
| CN104200783A (en) * | 2014-09-24 | 2014-12-10 | 广东欧珀移动通信有限公司 | Method and system for enabling mobile phone to acquire uniform light effect through production line calibration |
| CN104200783B (en) * | 2014-09-24 | 2017-01-11 | 广东欧珀移动通信有限公司 | Method and system for enabling mobile phone to acquire uniform light effect through production line calibration |
| CN105702682A (en) * | 2016-01-25 | 2016-06-22 | 昆山龙腾光电有限公司 | Thin film transistor array substrate, manufacturing method, and liquid crystal display panel |
| CN105702682B (en) * | 2016-01-25 | 2019-01-22 | 昆山龙腾光电有限公司 | Thin-film transistor array base-plate and production method and liquid crystal display panel |
| WO2019127575A1 (en) * | 2017-12-30 | 2019-07-04 | 深圳信炜科技有限公司 | Photosensitive drive circuit, photosensitive apparatus, and electronic device |
| CN109375402A (en) * | 2018-11-01 | 2019-02-22 | Oppo广东移动通信有限公司 | Display screen component and electronic equipment |
| CN109375402B (en) * | 2018-11-01 | 2021-11-02 | Oppo广东移动通信有限公司 | Display screen assembly and electronic equipment |
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Application publication date: 20101110 |