CN1920641A - Backlight deviced and control method thereof - Google Patents
Backlight deviced and control method thereof Download PDFInfo
- Publication number
- CN1920641A CN1920641A CNA2006101037988A CN200610103798A CN1920641A CN 1920641 A CN1920641 A CN 1920641A CN A2006101037988 A CNA2006101037988 A CN A2006101037988A CN 200610103798 A CN200610103798 A CN 200610103798A CN 1920641 A CN1920641 A CN 1920641A
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- Prior art keywords
- led unit
- brightness
- substrate
- lighting device
- back lighting
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133314—Back frames
Abstract
The present invention relates to a backlight device and control method thereof, including a case (100); a base substrate (120) installed inside the case (100), and a plurality of LED units (110) modularized and mounted on the base plate (120). In case a part of the plurality of LED units mounted on the base plate is in trouble, a local replacement of an LED unit is possible, so the repair and maintenance are simple and time consuming is short. Further, each of the plurality of modularized LED units is individually controlled in brightness. Therefore, brightness is uniformized among the plurality of LED units to advance the detection precision and the product reliability. In the modularized LED units which can be controlled respectively, the LED units arranged on the substrate fringe have higher brightness, so the brightness deviation is reduced. In addition, the LED units are small in themselves so a plurality of LED units are adjacently arranged to reduce the brightness deviation. Further, a reflecting plate is disposed integrally on the massive substrate of a plurality of LED units of the arranged units, which can simplify the component parts.
Description
Technical field
The present invention relates to the back lighting device and the control method thereof of liquid crystal board illumination checkout equipment, more particularly, relate to a kind of back lighting device and control method thereof of for ease of maintenaince maintaining and eliminating each LED unit brightness irregularities.
Background technology
Liquid crystal display (Liquid Crystal Display:LCD) device is configured in the LCD intralamellar part usually, is provided with the driving circuit by microprocessor operation, with display image on the LCD plate.
On the other hand, in the manufacturing process of LCD plate, the stage detection of will throwing light in the end.The illumination checkout equipment of this LCD plate uses sniffer to send electric signal for respectively the data line of LCD plate and gate line, drives the driving circuit of LCD plate.In addition, because LCD itself can not be sent the light that is used for display image, therefore light source must be set on the LCD plate with luminous by LCD.Therefore, be provided with from the back lighting device of the back side illuminated of LCD plate.
Fig. 1 is the exploded perspective view of existing back lighting device.As shown in the figure, existing back lighting device 10 comprises: housing 11; A plurality of lamps 13 are set up in parallel on housing 11 by lamp socket 12, send light to detected body; Reflecting plate 14 is arranged on the downside of lamp 13, the light that reflection is sent by lamp 13; Fan 15 is by being formed on the opening 11a circulation tempering air on the housing 11.In addition, the inboard of housing 11 also is provided with stabilizator 16.
In above-mentioned existing back lighting device 10, the light that lamp 13 sends passes diffuser plate 1 and shines by 2 pairs of detected bodies such as LCD plate of upper plate.At this, the light that lamp 13 sends reflects by reflecting plate 14, and detected body is shone.
Yet, in using the existing back lighting device of fluorescent light, will inevitably produce luminance deviation as lamp 13.
Promptly, the color of the component parts that comprises housing 11 of back lighting device 10 generally is made up of black, because black is easy to the light that absorption modulation 13 sends on its characteristic, the brightness of marginal portion of housing 11 sidepieces that therefore offers the light source of detected body is lower than the brightness of core.
Although produced this inevitable luminance deviation, the method that also the unevenness of this brightness is not compensated in the prior art.
In addition, the lamp 13 that the fluorescent light that laterally is arranged side by side is formed is because on/off is repeatedly operated, and the brightness of fluorescent light end reduces, and the brightness of each fluorescent light is fixing, thereby produces luminance deviation.
In addition, because the life-span of lamp 13 is unfixing, must maintenance.Yet, must decompose back lighting device 10 integral body whenever this moment, difficulty is big, and, there is the shortcoming that needs more time of cost and cost because of the lamp 13 that when installation and removal are combined in lamp 13 on the lamp socket 12 to force clamping mode, the constitutes broken easily reason such as operator that injures in operation by the little material of hardness.
On the other hand, based on above-mentioned problem, usually use brightness relative fixed, Halogen lamp LED that thermal value is high.Yet because still there is heat problem in it, and its size is big, therefore is not easy to be set on the back light unit.
Summary of the invention
The present invention proposes in order to solve above-mentioned prior art problem, and its purpose is to provide a kind of back lighting device and control method thereof, by the Modular LED unit is assembled on the substrate, when a part of LED unit exception, can change rapidly partly.
Another object of the present invention is to, a kind of back lighting device and control method thereof are provided, thereby wherein can regulate the brightness that to be distinguished controlled LED unit by modularization, can make its brightness even.
Another purpose of the present invention is, a kind of back lighting device and control method thereof are provided, and wherein, utilizes the brightness height that makes the LED unit that is arranged on substrate edges in a plurality of modular controlled respectively LED unit, can reduce luminance deviation.
Another purpose of the present invention is, a kind of back lighting device and control method thereof are provided, and wherein the LED of LED unit itself is very little, and a plurality of LED are in abutting connection with arrangement, thereby can reduce luminance deviation.
Another purpose of the present invention is, a kind of back lighting device and control method thereof are provided, and wherein is provided with reflecting plate integratedly, component parts is simplified there being a plurality of LED to be aligned on the bulk substrate in the LED unit.
To achieve these goals, back lighting device of the present invention comprises: housing; Be arranged on the substrate of described enclosure interior; Be assembled in LED unit on the described substrate in modular mode.
In addition, method for controlling backlight thereof of the present invention may further comprise the steps: the substrate that will be assembled with the modularized limit emitting diode (LED) unit is divided into zone arbitrarily; Brightness is carried out in described each zone of cutting apart to be detected; Luminance difference to the Benchmark brightness of detected described each regional brightness and setting is judged; Described each regional luminance difference is regulated evenly.
Description of drawings
Fig. 1 is the exploded perspective view of existing back lighting device;
Fig. 2 is the exploded perspective view of back lighting device of the present invention;
Fig. 3 is the assembling front view of back lighting device of the present invention;
Fig. 4 is the side view of Fig. 3;
Fig. 5 is according to the LED unit of the first embodiment of the present invention and the stereographic map of substrate assembled state;
Fig. 6 is the A part amplification stereogram of Fig. 5;
Fig. 7 be according to a second embodiment of the present invention the LED unit and the stereographic map of substrate assembled state;
Fig. 8 is the B part amplification stereogram of Fig. 7;
Fig. 9 is the C part amplification stereogram of Fig. 7;
Figure 10 is the LED unit of a third embodiment in accordance with the invention and the stereographic map of substrate assembled state;
Figure 11 is the D part amplification stereogram of Figure 10;
Figure 12 is the process flow diagram of method for controlling backlight thereof of the present invention;
Figure 13 is the process flow diagram of each control method of LED of the present invention unit.
Symbol description
100 housings, 101 stabilizators, 102 fans
104 power suppling parts, 110 LED unit, 111 bulk substrate
112 LED, 113 plugs, 114 grabs
115 slide protrusion, 120 substrates, 121 receptacle portion
122 installation portion 122a draw-in grooves, 124 chutes
125 hook portions, 126 springs
Embodiment
Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 2 is the exploded perspective view of back lighting device of the present invention.Fig. 3 is the assembling front view of back lighting device of the present invention.Fig. 4 is the side view of Fig. 3.Fig. 5 is first embodiment of LED unit and substrate assembled state.Fig. 6 is the A part amplification stereogram of Fig. 5.Fig. 7 be according to a second embodiment of the present invention the LED unit and the stereographic map of substrate assembled state.Fig. 8 is the B part amplification stereogram of Fig. 7.Fig. 9 is the C part amplification stereogram of Fig. 7.Figure 10 is the LED unit of a third embodiment in accordance with the invention and the stereographic map of substrate assembled state.Figure 11 is the D part amplification stereogram of Figure 10.Figure 12 is the process flow diagram of method for controlling backlight thereof of the present invention.Figure 13 is the process flow diagram of each control method of LED of the present invention unit.
Fig. 2 and back lighting device shown in Figure 3 comprise: housing 100; Be arranged on housing 100 inside, to the luminous modularized limit emitting diode (LED) unit 110 of detected body; Be provided with the substrate 120 of a plurality of LED unit; The fan 102 of circulating air in housing 100 to cool off.At this, the top of housing 100 is open, forms inside and has the square of spatial accommodation, is provided with a plurality of stabilizators 101 in the bottom surface of housing 100 inboards.
In addition, the face on the top of housing 100 is formed with a plurality of opening 102a along its length, and fan 102 is installed among each opening 102a.Fan 102 also can be arranged on top, bottom or the two sides that are formed with opening 102a.
And as shown in Figure 4, a side of housing 100 is formed with a plurality of power suppling parts 104, and is formed with a plurality of louvres that are used to dispel the heat 106.
Be formed with substrate 120 in the inside of housing 100 and by the modular LED unit 110 that is assembled on the substrate 120.
The LED unit forms square sheet material shape, comprising: the bulk substrate 111 that has reflecting plate; The a plurality of LED 112 that are welded on the bulk substrate 111 and are electrically connected respectively.
At this, bulk substrate 111 can also utilize coating etc. to realize the function of reflecting plate, and other reflecting plate (not shown) also can be set integratedly according to different situations.
And, on bulk substrate 111, also be provided with can sensed luminance luminance sensor 116.
On the other hand, for the LED unit 110 that has made by modularization adjoins each other on substrate 120, the assembling of a plurality of LED unit is arranged on the substrate 120, thereby forms following embodiment.Next such embodiment is elaborated.
First embodiment as shown in Figure 5 and Figure 6 is formed with a plurality of plugs 113 that are electrically connected with each LED 112 below the LED unit 110, is generally two.Position corresponding with this plug 113 on substrate 120 is formed with a plurality of receptacle portion 121.
Therefore, be clipped in the receptacle portion 121 of substrate 120 forcibly and under the state that prevents to come off, LED unit 110 is electrically connected and assembles with substrate 120 at the plug 113 of LED unit 110.
Thus, different each LED unit 110 adjoins each other and is assembled on the substrate 120.
To second embodiment shown in Figure 9, LED unit 110 and substrate 120 are assembled by lock uint at Fig. 7.
Lock uint comprises: the grab 114 that is formed at each 110 both sides, LED unit; Be formed at a plurality of installation portions 122 of longitudinally dividing on the substrate 120 side by side; Along two medial surfaces of each installation portion 122 according to the draw-in groove 122a that forms with the corresponding spacing of the size of LED unit 110.
Therefore, for LED unit 110 being assembled on the installation portion 122 of substrate 120, the user makes the grab 114 of 110 both sides, LED unit be placed on installation portion 122 with the state that slides backward, if discharge the grab 114 that the user catches simultaneously, then grab 114 is outstanding by the restoring force of spring.Outstanding grab 114 inserts in the draw-in groove 122a, under the state that throw off upward LED unit 110 LED unit 110 is assembled preventing.
Other each LED unit 110 that will have lock uint by said method are assembled into respectively on the substrate 120.And, on the installation portion 122 of the lower surface of LED unit 110 and the substrate 120 corresponding, be provided with flat electric connection terminal, so that LED unit 110 and substrate 120 are electrically connected with it.
In Figure 10 and the 3rd embodiment shown in Figure 11, by on substrate 120, longitudinally forming the chute 124 of isolating preset distance, lower surface in LED unit 110 forms the slide protrusion 115 corresponding with chute 124 shapes, and a plurality of LED unit 110 thus can be slidingly connected along the chute 124 of substrate 120.
And, on the chute 124 of the substrate 120 corresponding, be provided with flat splicing ear (not shown), so that LED unit 110 is electrically connected with substrate 120 with the slide protrusion 115 of LED unit 110.
In addition, for the LED unit 110 that prevents slidingly assemble comes off, also be provided with stop motion mechanism on chute 124, the entrance side adjacency of this stop motion mechanism and chute 124 also is provided with hook portion 125.
Therefore, for LED unit 110 is installed on the substrate 120, when extruding is formed at the hook portion 125 of the chute 124 on the substrate 120, slide successively and insert LED unit 110, in the LED unit 110 that the insertion of sliding finishes, be positioned at top LED unit 110 and contact in case anti-avulsion falls with the hook portion 125 of giving prominence to.
As mentioned above, Modular LED unit 110 adjoins each other on substrate 120, and can arrange a plurality of at substrate 120.Self-evident, can load and unload respectively according to package assembly, also can realize changing respectively.
In addition, also a Modular LED unit 110 can be assembled on the substrate 120 in mode removably.
Next, the control method to the LED unit 110 on the substrate 120 that is assembled in said structure after the modularization is specifically described.
As Figure 12 and shown in Figure 13, in step 200, the substrate 120 that will be used for the LED unit 110 of Knockdown blockization is divided into zone arbitrarily.
At this, external power source is applied on the substrate 120 that Modular LED unit 110 is installed by power suppling part 104.In the control part 127 of the substrate 120 that is applied in power supply by power suppling part 104, can control the brightness of each LED unit 110 of modularization assembling.
Thus, LED unit 110 is divided into zone (with reference to Fig. 3) arbitrarily in abutting connection with arranging the substrate 120 that is provided with.
Arbitrarily Region Segmentation can be with a LED unit 110 as a zone, preferably, be divided into the zone that comprises some LED unit 110.
Secondly, carrying out in the step 210 of brightness detection detecting each zone of being cut apart, using the luminance sensor 116 that is provided with on each LED unit 110 to carry out brightness detects, the brightness detected value of each LED unit 110 of being measured sends control part 127 to, concentrates in the control part 127 with each brightness value with each zone.
Under following state, carry out the step 220 that the difference value of the Benchmark brightness of brightness that zones of different is detected and setting is judged.
In control part 127,, the brightness value of having set that is equivalent to a LED unit 110 or the brightness value of zones of different have been set with as the Benchmark brightness value.Judge the poor of brightness value that zoness of different detect and this Benchmark brightness value by control part 127.
And, the luminance difference of zones of different is being regulated in the uniform step 230,240, according to the judgement of control part 127, the zone that brightness is lower than the reference value of setting raises the voltage that imposes on the low LED unit 110 of brightness by control part 127, so that brightness reaches reference value (step 230).
And according to the judgement of control part 127, the zone that brightness is higher than the reference value of setting reduces the voltage that imposes on the high LED unit 110 of brightness by control part 127, so that brightness reaches reference value (step 240).
Therefore, uniform brightness can be kept by control part 127 in each the LED unit 110 that is assembled on the substrate 120.
On the other hand, as controlling more effective ways of even brightness,, preferably, make the brightness of the brightness of the LED unit 110 that is configured in substrate 120 edges greater than the LED unit 110 at center according to the characteristic of the modular LED unit of being controlled respectively 110.
So, the present invention be a kind of in modularization LED unit 110 in a part of LED unit 110 the very useful technology that can change partly when unusual takes place.
More than by the mode of preferred embodiment the present invention is described in detail, yet the present invention is not limited thereto.Will be understood by those skilled in the art that, under the situation that does not break away from thought of the present invention and spirit, can make amendment or change the present invention.
As mentioned above, back lighting device of the present invention and control method thereof, by with modularization the LED unit be assembled on the substrate, when a part of LED unit takes place when unusual, can change rapidly partly, because maintenance is simple, therefore the time of cost is short.
In addition, the homogenising of brightness can be realized in the LED unit that can be distinguished Be Controlled brightness after the modularization, and accuracy of detection is higher thus, can improve reliability of products.
In addition, in the controlled LED of the difference unit, the LED unit that is configured in substrate edges uses the high LED unit of brightness, thereby can reduce luminance deviation after by modularization.
In addition, the LED of LED unit itself is very little, and a plurality of LED arrangement that adjoins each other can reduce luminance deviation.
In addition, on the bulk substrate of a plurality of LED that arrange the LED unit, be integrally formed with reflecting plate, component parts is simplified.
Claims (16)
1. back lighting device is characterized in that comprising:
Housing;
Be arranged on the substrate of described enclosure interior; With
Be assembled in the LED unit on the described substrate.
2. back lighting device as claimed in claim 1 is characterized in that, also is provided with the control part of the described LED of may command unit brightness on described substrate.
3. back lighting device as claimed in claim 1 is characterized in that, a plurality of described LED unit is arranged on the described substrate with adjoining each other.
4. back lighting device as claimed in claim 3 is characterized in that, in the controlled described LED of the difference unit, is arranged on the brightness height of the LED unit of described substrate edges after by modularization.
5. back lighting device as claimed in claim 1 is characterized in that, described LED unit is removably disposed on the described substrate.
6. back lighting device as claimed in claim 1 is characterized in that, described LED unit comprises: the bulk substrate that is provided with reflecting plate; And be arranged in a plurality of LED on the described bulk substrate.
7. back lighting device as claimed in claim 1 is characterized in that, described LED unit also is provided with luminance sensor.
8. back lighting device as claimed in claim 1, it is characterized in that, lower surface in described LED unit is formed with the plug that is electrically connected with described a plurality of LED, and position corresponding with described plug on described substrate is formed with receptacle portion, the be electrically connected ground connection assembling of described LED unit and described substrate.
9. back lighting device as claimed in claim 1 is characterized in that, described LED unit and described substrate are assembled by lock uint.
10. back lighting device as claimed in claim 9 is characterized in that, described lock uint comprises: the grab that is formed at described LED unit two side ends; And be formed on the described substrate and the draw-in groove that combines with described grab.
11. back lighting device as claimed in claim 1, it is characterized in that, be formed with the chute of preset distance at interval on the length direction of described substrate, the lower surface in described LED unit is formed with the shape slide protrusion corresponding with described chute, and described LED unit slidingly assemble is on described substrate.
12. back lighting device as claimed in claim 11 is characterized in that, also is provided with stop motion mechanism in the described chute of described substrate.
13. back lighting device as claimed in claim 12 is characterized in that, described stop motion mechanism is made of hook portion, and described hook portion is positioned at the entrance side of described chute, and the restoring force by spring can be provided with highlightedly.
14. a method for controlling backlight thereof is characterized in that, may further comprise the steps:
The substrate that is assembled with the Modular LED unit is divided into zone arbitrarily;
Brightness is carried out in described each zone of cutting apart to be detected;
Luminance difference to the Benchmark brightness of described each the regional brightness that detects and setting is judged;
Described each regional luminance difference is regulated evenly.
15. method for controlling backlight thereof as claimed in claim 14 is characterized in that, in the step of described each zone of cutting apart being carried out the brightness detection, by being arranged on the brightness on the luminance sensor detection LED unit on the described LED unit in addition.
16. method for controlling backlight thereof as claimed in claim 14, it is characterized in that, described each regional luminance difference is being regulated in the uniform step, according to the luminance difference of being judged, reduce the input voltage that brightness is higher than the zone of described Benchmark brightness, improve the voltage that brightness is lower than the zone of described Benchmark brightness, even with the brightness regulation that each is interregional.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050078612A KR100645788B1 (en) | 2005-08-26 | 2005-08-26 | Backlight deviced |
| KR1020050078612 | 2005-08-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1920641A true CN1920641A (en) | 2007-02-28 |
Family
ID=37654565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101037988A Pending CN1920641A (en) | 2005-08-26 | 2006-08-01 | Backlight deviced and control method thereof |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4336699B2 (en) |
| KR (1) | KR100645788B1 (en) |
| CN (1) | CN1920641A (en) |
| TW (1) | TW200709151A (en) |
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| DE102016102279A1 (en) * | 2015-07-15 | 2017-01-19 | Heraeus Noblelight Gmbh | Module-like LED emitter unit and use of the same |
-
2005
- 2005-08-26 KR KR1020050078612A patent/KR100645788B1/en not_active IP Right Cessation
-
2006
- 2006-06-26 JP JP2006175044A patent/JP4336699B2/en not_active Expired - Fee Related
- 2006-07-20 TW TW095126492A patent/TW200709151A/en unknown
- 2006-08-01 CN CNA2006101037988A patent/CN1920641A/en active Pending
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| US8764212B2 (en) | 2007-07-19 | 2014-07-01 | Samsung Electronics Co., Ltd. | Backlight unit |
| US8220944B2 (en) | 2007-07-19 | 2012-07-17 | Samsung Led Co., Ltd. | Backlight unit |
| US9519184B2 (en) | 2007-07-19 | 2016-12-13 | Samsung Electronics Co., Ltd. | Backlight unit |
| CN101680624B (en) * | 2007-07-27 | 2012-09-26 | 夏普株式会社 | Lighting equipment and display device using the same |
| CN101661192B (en) * | 2008-08-28 | 2011-12-14 | 株式会社日立显示器 | Backlight for liquid crystal display device and liquid crystal display device using the same |
| US8243232B2 (en) | 2008-08-28 | 2012-08-14 | Hitachi Displays, Ltd. | Backlight for liquid crystal display device and liquid crystal display device using the same |
| CN102097071B (en) * | 2009-12-14 | 2013-09-25 | 乐金显示有限公司 | Local dimming driving method and device of liquid crystal display device |
| CN102097071A (en) * | 2009-12-14 | 2011-06-15 | 乐金显示有限公司 | Local dimming driving method and device of liquid crystal display device |
| US8670006B2 (en) | 2009-12-14 | 2014-03-11 | Lg Display Co., Ltd. | Local dimming driving method and device of liquid crystal display device |
| CN103238023A (en) * | 2010-12-01 | 2013-08-07 | 夏普株式会社 | Planar light-emitting illumination device |
| CN102915104A (en) * | 2011-08-01 | 2013-02-06 | 浪潮乐金数字移动通信有限公司 | Terminal device and display control method of display screen |
| CN102750931A (en) * | 2012-07-25 | 2012-10-24 | 广东威创视讯科技股份有限公司 | Method and device for adjusting conformity of spliced wall |
| CN106328048A (en) * | 2015-07-03 | 2017-01-11 | 点晶科技股份有限公司 | Point Image Compensation Method and System for Light Emitting Diode Display Device |
| CN107464524A (en) * | 2017-08-25 | 2017-12-12 | 惠科股份有限公司 | The optimal way and equipment of luminance compensation |
| CN107464524B (en) * | 2017-08-25 | 2021-03-30 | 惠科股份有限公司 | Optimization mode of brightness compensation |
| CN109061938A (en) * | 2018-07-25 | 2018-12-21 | 河南东润电子有限公司 | A kind of light leakage backlight panel for camber display screen |
| CN111022943A (en) * | 2019-11-26 | 2020-04-17 | 中国传媒大学 | Random direct insertion type LED point light source lamp module system without connecting wires |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200709151A (en) | 2007-03-01 |
| JP4336699B2 (en) | 2009-09-30 |
| JP2007066879A (en) | 2007-03-15 |
| KR100645788B1 (en) | 2006-11-14 |
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