CN101221962B - Display backlight module including photo-sensing device, LCD panel and display equipment - Google Patents
Display backlight module including photo-sensing device, LCD panel and display equipment Download PDFInfo
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- CN101221962B CN101221962B CN2008100039538A CN200810003953A CN101221962B CN 101221962 B CN101221962 B CN 101221962B CN 2008100039538 A CN2008100039538 A CN 2008100039538A CN 200810003953 A CN200810003953 A CN 200810003953A CN 101221962 B CN101221962 B CN 101221962B
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Abstract
The invention provides a display backlight module comprising a photosensitive device, a liquid crystal display panel and a liquid crystal display unit. The liquid crystal display panel is used in the liquid crystal display unit, the liquid crystal display unit is provided with the display backlight module which comprises a first substrate, a second substrate, a liquid crystal layer, at least a photosensitive device and a visible light filtering layer. At least one photosensitive device is positioned on the photosensitive area of the first substrate and used to receive incident light, wherein, the photosensitive device comprises a first photosensitive element used to sense the incident light to produce a first current, and a second photosensitive element electrically connected with the first photosensitive element; the visible light filtering layer is arranged above the second photosensitive element arranged on the photosensitive area, and is used to filter the visible light of the incident light to make the second photosensitive element sense the filtered incident light to produce a second current.
Description
Technical field
The invention relates to a kind of photosensitive device, and particularly relevant for a kind of photosensitive device that is contained in display backlight module, display panels and liquid crystal indicator.
Background technology
Portable communication apparatus seems more and more important in the flourish epoch of science and technology of communication now.And the user is also more and more many to the demand of the display panels on the portable type communication device, and wherein contrast, resolution, color saturation and brightness all are to influence the good bad important indicator of display panels.
The wherein adjustment of panel luminance, often by on panel, be provided with can sensing surrounding environment luminosity power photosensitive device adjust.The electric current that light caused that receives as photosensitive device is stronger, representing the light intensity of surrounding environment stronger, and then will adjust panel for more weak brightness, otherwise, as the electric current that causes a little less than, then strengthen the brightness of panel,, allow the user under the brightness that eyes feel comfortably cool, watch display panels with the strong and weak degree of the light that meets the residing surrounding environment of user.
So photosensitive device but usually is subjected to the influence of invisible light and judges the light power of surrounding environment by accident.In the light of general surrounding environment, comprise the composition of visible light and invisible light in fact, wherein influenced people's visually-perceptible, had only the part of visible light.Invisible light mainly contains infrared light, ultraviolet light, and its mid-infrared light has usually influenced the judgement of aforesaid photosensitive device to surrounding environment light power significantly.If have Halogen lamp LED in the environment, or colour temperature is under the A light source about 2856K, though human eye can't be seen infrared light, but photosensitive device will produce induction and make the brightness of display panels adjust to the brightness that human eye is not suitable for watching infrared light, and further user's eyesight is damaged.
In view of this, provide one can the sensing invisible light sensing apparatus so that display panels can be really because of the strong and weak adjustment that carry out brightness of the light of environment, be industry problem demanding prompt solution for this reason.
Summary of the invention
Therefore purpose of the present invention just provides a kind of photosensitive device, is used for the display backlight module, and to receive incident light, photosensitive device comprises at least: first photo-sensitive cell, second photo-sensitive cell and visible light filter layer.First photo-sensitive cell in order to sensing incident light to produce first electric current; Second photo-sensitive cell and first photo-sensitive cell electrically connect; The visible light filter layer is arranged on second photo-sensitive cell, in order to filter the visible light part of incident light, makes incident light that second photosensitive elements sense filtered to produce second electric current.
Another object of the present invention is a kind of display panels to be provided, to be used for liquid crystal indicator, and liquid crystal indicator has the display backlight module, comprises: first substrate, second substrate, liquid crystal layer, at least photosensitive device and, the visible light filter layer.First substrate has pixel region and photosensitive area, and wherein photosensitive area is around the pixel region setting; Second substrate is set in parallel on first substrate; Liquid crystal layer is arranged between second substrate and first substrate; At least one photosensitive device is positioned on first substrate of photosensitive area, and in order to receive incident light, wherein photosensitive device comprises in order to sensing incident light with first photo-sensitive cell that produces first electric current and second photo-sensitive cell that electrically connects with first photo-sensitive cell; The visible light filter layer is arranged at second photo-sensitive cell top of described photosensitive area, in order to filter the visible light part of incident light, makes incident light that second photosensitive elements sense filtered to produce second electric current; Light shield layer, around described pixel region setting, on the position corresponding to described photosensitive device, have first opening and second opening that correspond respectively to described first photo-sensitive cell and described second photo-sensitive cell, make described incident light only can pass through described first opening and described second opening.
Another purpose of the present invention is that a kind of liquid crystal indicator is being provided, and comprises at least: first substrate, second substrate, liquid crystal layer, at least one photosensitive device reach, the visible light filter layer.First substrate has pixel region and photosensitive area, and wherein photosensitive area is around the pixel region setting; Second substrate is set in parallel on first substrate; Liquid crystal layer is arranged between second substrate and first substrate; At least one photosensitive device is positioned on first substrate of photosensitive area, and in order to receive incident light, wherein photosensitive device comprises in order to sensing incident light with first photo-sensitive cell that produces first electric current and second photo-sensitive cell that electrically connects with first photo-sensitive cell; The visible light filter layer is arranged at second photo-sensitive cell top of described photosensitive area, in order to filter the visible light part of incident light, makes incident light that second photosensitive elements sense filtered to produce second electric current; Light shield layer, around described pixel region setting, on the position corresponding to described photosensitive device, have first opening and second opening that correspond respectively to described first photo-sensitive cell and described second photo-sensitive cell, make described incident light only can pass through described first opening and described second opening.
The invention has the advantages that and to utilize photosensitive device sensing invisible light, make panel when carrying out the brightness adjustment, can consider the influence of invisible light, make panel luminance can positively be adjusted to the comfortable degree of user, and reach above-mentioned purpose easily.
After consulting execution mode graphic and that describe subsequently, described technical field has knows that usually the knowledgeable just can understand purpose of the present invention, and technological means of the present invention and execution mode.
Description of drawings
For allowing above-mentioned and other purposes of the present invention, feature, advantage and embodiment can become apparent appended graphic being described in detail as follows:
Figure 1A is the calcspar of the liquid crystal indicator of the first embodiment of the present invention;
Figure 1B is the vertical view that illustrates first substrate in the display panels of the first embodiment of the present invention;
Fig. 2 A is the profile for the display panels of the first embodiment of the present invention;
Fig. 2 B is the schematic diagram for photosensitive device of the present invention;
Fig. 2 C is the profile for the display panels of the second embodiment of the present invention;
Fig. 3 is the calcspar that illustrates photosensitive device of the present invention; And
Fig. 4 is the profile of the display panels of the third embodiment of the present invention.
Drawing reference numeral:
1: liquid crystal indicator 10,10 ': display panels
11,11 ': incident light 12: the display backlight module
13,13 ': control circuit 14: photosensitive device
14a, 14b, 14c, 14d: photosensitive device 15: display brightness
101,101 ': photosensitive area 100,100 ': pixel region
131: electric current 130: current-to-voltage convertor
133: but modulating coefficient 132: sampling/conservator
135: controller 134: the numerical digit analogy converter
200: the first substrates of 201: the second substrates
203: visible light filter layer 202: liquid crystal layer
203b: blue color filter layer 203a: red filter layer
204: liquid crystal material 203c: green filter layer
205b: the second photo-sensitive cell 205a: first photo-sensitive cell
207a: first opening 206: light shield layer
208a, 208b: protective layer 207b: second opening
210a, 210b: both alignment layers 209a, 209b: transparency conducting layer
31: the first electric current 220a, 220b: gap control material
33: the second electric currents of 400: the first substrates
402: 401: the second substrates of liquid crystal layer
403a: red filter layer 403: visible light filter layer
403c: green filter layer 403b: blue color filter layer
404: liquid crystal material 405a: first photo-sensitive cell
405b: second photo-sensitive cell 406: light shield layer
407a: the first opening 407b: second opening
408b: protective layer 409a, 409b: transparency conducting layer
411: dielectric layer 410a, 410b: both alignment layers
Embodiment
Please refer to Figure 1A, it illustrates the calcspar according to the liquid crystal indicator 1 of first embodiment of the invention.Liquid crystal indicator 1 comprises display panels 10 and display backlight module 12.Be arranged at the photosensitive device 14 in the display panels 10, can penetrate light 11 in order to receive, and by control circuit 13 output currents in the photosensitive device 14 so that display backlight module 12 is adjusted the display brightness 15 of display floaters.Figure 1B is the vertical view that illustrates first substrate 200 in the display panels 10, and wherein first substrate 200 has the photosensitive area 101 that pixel region 100 reaches around pixel region 100 settings.Photosensitive device 14a, 14b, 14c and 14d are arranged at four jiaos of photosensitive area 101 respectively, can receive incident light and carry out sensing.In other embodiment, those skilled in the art also can adjust the number and the area of photosensitive device 14 easily according to circumstances.
Fig. 2 A is the profile of the display panels 10 of first embodiment.Display panels 10 comprises first substrate 200, second substrate 201, liquid crystal layer 202 and visible light filter layer 203.First substrate 200 has pixel region 100 photosensitive areas 101, the second substrates 201 and is set in parallel on first substrate 200 with first substrate 200; Liquid crystal layer 202 is arranged between second substrate 201 and first substrate 200, can comprise liquid crystal material 204.Comprise gap control material between first substrate 200 and second substrate 201, to keep the spacing between first substrate 200 and second substrate 201.The second photo-sensitive cell 205b that first substrate 201 comprises the first photo-sensitive cell 205a and electrically connects with the first photo-sensitive cell 205a.The first photo-sensitive cell 205a and the second photo-sensitive cell 205b are contained in the photosensitive device 14 shown in Fig. 2 B.Above the first photo-sensitive cell 205a and the second photo-sensitive cell 205b, gap control material (Photospacer is set optionally; PS) 220a, 220b.Photosensitive device 14 is positioned on first substrate 201 of described photosensitive area 101, in order to receive incident light 11, wherein photosensitive device 14 comprises: reach the described second photo-sensitive cell 205b that electrically connects with the first photo-sensitive cell 205a in order to sensing incident light 11 with the described first photo-sensitive cell 205a that produces first electric current 31.Wherein the first photo-sensitive cell 205a and the second photo-sensitive cell 205b can respectively comprise a PIN type diode (PIN-diode), sensitization electric crystal (Photo transistor) or other class shapes.In present embodiment, also comprise light shield layer 206 (Black matrix on first substrate 200; BM), be arranged in the photosensitive area 101, have the first opening 207a and the second opening 207b, make incident light 11 only can pass through the first opening 207a and the second opening 207b corresponding to the first photo-sensitive cell 205a and the second photo-sensitive cell 205b.
Shown in Fig. 2 A and Fig. 2 B, visible light filter layer 203 is arranged at the second photo-sensitive cell 205b top of photosensitive area 101, in present embodiment, be positioned on the second opening 207b of first substrate 200, in order to filter the visible light part of incident light 11, only surplus invisible light part (comprising ultraviolet light and infrared light part) penetrates visible light filter layer 203, makes incident light 11 that the second photo-sensitive cell 205b sensing filtered to produce second electric current 33.In present embodiment, the visible light filter layer comprises red filter layer 203a and blue color filter layer 203b, thus the visible light part of filtering incident light 11.Photosensitive device 14 also comprises control circuit 13, connect the first photo-sensitive cell 205a and the second photo-sensitive cell 205b, according to the electric current difference of first electric current 31 and second electric current 33, the luminous intensity after the influence of representative deduction invisible light, and then the display brightness 15 of the display backlight module 12 of adjustment Figure 1A.The first photo-sensitive cell 205a and the second photo-sensitive cell 205b can connect back output current difference earlier to control circuit 13, also can connect control circuit 13 respectively, calculate the electric current difference by the electronic component in the control circuit 13.By the photosensitive device 14 of present embodiment, influence that can the sensing invisible light is further done accurately the brightness of display panels 10 and is adjusted.Shown in Fig. 2 C, in another embodiment, the visible light filter layer comprises red filter layer 203a, blue color filter layer 203b and green filter layer 203c, and the visible light part of filtering incident light 11 and ultraviolet light be partly thus.By the visible light filter layer of present embodiment, can behind the filtering ultraviolet light, do more accurate sensing, further the brightness of display panels 10 is done more accurately and adjusted.
Fig. 3 is the further calcspar of photosensitive device 14.The electric current 131 that the first photo-sensitive cell 205a and second photo-sensitive cell 205b output sense is to current-to-voltage convertor 130, but via modulating coefficient 133, after sampling/conservator 132 is obtained the anaiog signal of voltage and numerical digit analogy converter 134 and is transferred the voltage anaiog signal to the numerical digit pattern, get the brightness value after surround lighting deduction invisible light influences again by controller 135 calculating, and then the display brightness 15 of adjustment backlight module 12, the assorted letter that can reduce invisible light influences the shown brightness value of backlight module 12, makes the display brightness 15 of backlight module 12 more meet the demand of human eye.
Fig. 4 is the profile of the display panels 10 ' of the third embodiment of the present invention.Wherein display panels 10 ' can be used in the liquid crystal indicator 1 of first embodiment.Display panels 10 ' comprises first substrate 400, second substrate 401, liquid crystal layer 402 and visible light filter layer 403.First substrate 400 has pixel region 100 ' photosensitive area 101 ', the second substrate 401 and is set in parallel on first substrate 400; Liquid crystal layer 402 is arranged between second substrate 401 and first substrate 400, can comprise liquid crystal material 404.The second photo-sensitive cell 405b that second substrate 401 comprises the first photo-sensitive cell 405a and electrically connects with the first photo-sensitive cell 405a.The first photo-sensitive cell 405a and the second photo-sensitive cell 405b are contained in the photosensitive device.The setting of photosensitive device, identical in fact with photosensitive device 14 among first embodiment, so do not repeat them here.The first photo-sensitive cell 405a and the second photo-sensitive cell 405b respectively comprise a PIN type diode (PIN-diode).In present embodiment, second substrate 401 comprises dielectric layer 411, cover described second substrate, also comprise light shield layer 406 on the dielectric layer 411, be arranged in the photosensitive area 101, corresponding to having the first opening 407a and the second opening 407b on the photosensitive device first photo-sensitive cell 405a and the second photo-sensitive cell 405b, make incident light 11 ' only can pass through the first opening 407a and the second opening 407b.
Visible light filter layer 403 is arranged at second photo-sensitive cell 405b top, in present embodiment, be positioned on the second opening 407b of second substrate 401,, make incident light 11 ' that the second photo-sensitive cell 405b sensing filtered to produce second electric current in order to filter the visible light part of incident light 11 '.In present embodiment, the visible light filter layer comprises red filter layer 403a, blue color filter layer 403b and green filter layer 403c, and the visible light of filtering incident light 11 ' part and ultraviolet light are partly thus.Photosensitive device as first embodiment, photosensitive device also comprises control circuit, connect the first photo-sensitive cell 405a and the second photo-sensitive cell 405b, the electric current difference of second electric current that first electric current that is produced according to the first photo-sensitive cell 405a and the second photo-sensitive cell 405b are produced, luminous intensity after the influence of representative deduction invisible light, the display brightness 15 of the display backlight module 12 of adjustment Figure 1A.By the photosensitive device of present embodiment, more accurate sensing is done in influence that can the sensing invisible light especially behind the filtering ultraviolet light, further the brightness of display panels 10 is done more accurately and is adjusted.It is noted that, the visible light filter layer that comprises red filter layer, blue color filter layer and green filter layer, also can be applicable in the display panels 10 among first embodiment, and comprise the visible light filter layer of red filter layer and blue color filter layer among first embodiment, also can be applicable to present embodiment.
By the invention described above preferred embodiment as can be known, application the invention has the advantages that and can utilize photosensitive device sensing invisible light, make panel when carrying out the brightness adjustment, can consider the influence of invisible light, make panel luminance can be adjusted to the comfortable degree of user exactly, and reach above-mentioned purpose easily.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the present invention; when can doing various changes and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (17)
1. a display panels is used for liquid crystal indicator, it is characterized in that, described liquid crystal indicator has the display backlight module, comprises:
First substrate has pixel region and photosensitive area, and wherein said photosensitive area is around described pixel region setting;
Second substrate is set in parallel on described first substrate;
Liquid crystal layer is arranged between described second substrate and described first substrate;
At least one photosensitive device is positioned on described first substrate of described photosensitive area, and in order to receive incident light, wherein said photosensitive device comprises:
First photo-sensitive cell, in order to the described incident light of sensing to produce first electric current;
Second photo-sensitive cell electrically connects with described first photo-sensitive cell; And
The visible light filter layer is arranged at described second photo-sensitive cell top of described photosensitive area, in order to filter the visible light part of described incident light, makes described incident light that described second photosensitive elements sense filtered to produce second electric current; Light shield layer, around described pixel region setting, on the position corresponding to described photosensitive device, have first opening and second opening that correspond respectively to described first photo-sensitive cell and described second photo-sensitive cell, make described incident light only can pass through described first opening and described second opening.
2. display panels as claimed in claim 1 is characterized in that, also comprises protective layer on described second substrate.
3. display panels as claimed in claim 2 is characterized in that, described second substrate also comprises transparency conducting layer and both alignment layers, and described both alignment layers is positioned on the described transparency conducting layer.
4. display panels as claimed in claim 1 is characterized in that, also comprises protective layer on described first substrate and is positioned on described pixel region and the described photosensitive area.
5. display panels as claimed in claim 4 is characterized in that, also comprises transparency conducting layer and both alignment layers on described first substrate, and described transparency conducting layer is positioned on the described protective layer, and described both alignment layers is positioned on the described transparency conducting layer.
6. display panels as claimed in claim 1 is characterized in that, described display panels also comprises gap control material and is arranged in the described liquid crystal layer.
7. display panels as claimed in claim 1 is characterized in that, described first photo-sensitive cell and described second photo-sensitive cell respectively comprise a PIN type diode.
8. display panels as claimed in claim 1 is characterized in that, described visible light filter layer comprises red filter layer and blue color filter layer.
9. display panels as claimed in claim 1 is characterized in that, described visible light filter layer comprises red filter layer, blue color filter layer and green filter layer.
10. display panels as claimed in claim 1, it is characterized in that, described display panels also comprises control circuit, connect described first photo-sensitive cell and described second photo-sensitive cell, according to the electric current difference of described first electric current and described second electric current, adjust the display brightness of described display backlight module.
11. display panels as claimed in claim 1 is characterized in that, described display panels comprises that described first photo-sensitive cell is connected with described second photo-sensitive cell, to export the electric current difference of described first electric current and described second electric current.
12. a liquid crystal indicator is characterized in that, described liquid crystal indicator comprises at least:
First substrate has pixel region and photosensitive area, and wherein said photosensitive area is around described pixel region setting:
Second substrate is set in parallel on described first substrate;
Liquid crystal layer is arranged between described second substrate and described first substrate;
At least one photosensitive device is positioned at described photosensitive area, and in order to receive incident light, wherein said photosensitive device comprises:
First photo-sensitive cell, in order to the described incident light of sensing to produce first electric current;
Second photo-sensitive cell electrically connects with described first photo-sensitive cell; And
The visible light filter layer is arranged at described second photo-sensitive cell top of described photosensitive area, in order to filter the visible light part of described incident light, makes described incident light that described second photosensitive elements sense filtered to produce second electric current; Light shield layer, around described pixel region setting, on the position corresponding to described photosensitive device, have first opening and second opening that correspond respectively to described first photo-sensitive cell and described second photo-sensitive cell, make described incident light only can pass through described first opening and described second opening.
13. liquid crystal indicator as claimed in claim 12 is characterized in that, described first photo-sensitive cell and described second photo-sensitive cell respectively comprise a PIN type diode.
14., it is characterized in that described visible light filter layer comprises red filter layer and blue color filter layer as claim 12 a described liquid crystal indicator.
15. liquid crystal indicator as claimed in claim 12 is characterized in that, described visible light filter layer comprises red filter layer, blue color filter layer and green filter layer.
16. liquid crystal indicator as claimed in claim 12, it is characterized in that, described liquid crystal indicator also comprises control circuit, connect described first photo-sensitive cell and described second photo-sensitive cell, according to the electric current difference of described first electric current and described second electric current, adjust the display brightness of described display backlight module.
17. liquid crystal indicator as claimed in claim 12 is characterized in that, comprises that described first photo-sensitive cell is connected with described second photo-sensitive cell, to export the electric current difference of described first electric current and described second electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100039538A CN101221962B (en) | 2008-01-23 | 2008-01-23 | Display backlight module including photo-sensing device, LCD panel and display equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100039538A CN101221962B (en) | 2008-01-23 | 2008-01-23 | Display backlight module including photo-sensing device, LCD panel and display equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101221962A CN101221962A (en) | 2008-07-16 |
| CN101221962B true CN101221962B (en) | 2010-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100039538A Expired - Fee Related CN101221962B (en) | 2008-01-23 | 2008-01-23 | Display backlight module including photo-sensing device, LCD panel and display equipment |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214027A (en) * | 2010-04-06 | 2011-10-12 | 元太科技工业股份有限公司 | Display panel |
| CN103901669B (en) * | 2012-12-26 | 2017-04-19 | 上海天马微电子有限公司 | Liquid crystal display panel |
| CN104570449A (en) * | 2015-01-29 | 2015-04-29 | 京东方科技集团股份有限公司 | Display panel, manufacturing method of display panel, and display device |
| KR102176409B1 (en) | 2016-08-25 | 2020-11-09 | 베이징 시아오미 모바일 소프트웨어 컴퍼니 리미티드 | Display panel, terminal and display control method |
| CN106971173B (en) * | 2017-04-13 | 2021-01-26 | 京东方科技集团股份有限公司 | Touch substrate and display panel |
| CN111373313B (en) * | 2017-09-28 | 2023-06-16 | 深圳传音通讯有限公司 | Display panel assembly, mobile terminal, image generation method, and storage medium |
| CN107785400A (en) * | 2017-10-26 | 2018-03-09 | 京东方科技集团股份有限公司 | Array base palte and display device |
| CN108983470A (en) * | 2018-07-31 | 2018-12-11 | Oppo广东移动通信有限公司 | Display screen component and electronic equipment |
| TWI675245B (en) * | 2018-09-07 | 2019-10-21 | 友達光電股份有限公司 | Display panel |
| CN109614958B (en) * | 2019-01-04 | 2020-11-17 | 合肥京东方光电科技有限公司 | Liquid crystal display device, line identification method and electronic equipment |
| CN109786473B (en) | 2019-01-25 | 2021-09-21 | 京东方科技集团股份有限公司 | Packaging cover plate, manufacturing method thereof and display device |
| CN110275341B (en) * | 2019-06-28 | 2022-04-12 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110727135B (en) * | 2019-10-28 | 2022-05-17 | 厦门天马微电子有限公司 | Color film substrate, display panel and display device |
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| CN1885137A (en) * | 2005-06-25 | 2006-12-27 | 群康科技(深圳)有限公司 | Liquid crystal display device |
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| CN1447155A (en) * | 2002-03-26 | 2003-10-08 | 精工爱普生株式会社 | LCD device and electronic equipment |
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