CN101169557A - Liquid crystal display with light-emitting diode backlight module and light correction unit - Google Patents

Abstract

The invention relates to a liquid crystal display with a light-emitting diode backlight module and a light correction unit, comprising: the backlight module comprises a light barrier and a light emitting diode backlight source; the liquid crystal display panel comprises a first polarization piece, liquid crystal, a thin film transistor array substrate and a second polarization piece; the control circuit is connected to the backlight module and the liquid crystal panel, can generate corresponding control voltage according to an image signal and transmits the corresponding control voltage to the transparent electrode of the indium tin oxide film corresponding to the thin film transistor by utilizing the scanning line on the thin film transistor array substrate; the control circuit can generate a first compensation signal to the LED backlight light source according to the internal intensity and the chrominance signal generated by the internal light detector; the first compensation signal can adjust the brightness or color of the LED backlight light source.

Description

Liquid crystal display with LED backlight module and light correction unit

technical field

The invention relates to a liquid crystal display, in particular to a liquid crystal display with a light emitting diode backlight module and a correction unit.

Background technique

A backlight unit (backlight unit) of a liquid crystal display (LCD) can provide a light source required by the liquid crystal display. That is to say, since the liquid crystal panel of the liquid crystal display does not emit light itself, the performance of the backlight module in the liquid crystal display can determine the external visual sense of the liquid crystal display. With the improvement of liquid crystal display manufacturing technology and the trend of large size and low price, in order to maintain market competitiveness, it is the latest trend to develop and design a new type of backlight module to make the backlight module meet high brightness and low power consumption.

Generally speaking, the light source of the backlight module of the conventional liquid crystal display is composed of cold cathode fluorescent lamp (CCFL for short). However, since the color saturation of CCFL is not high, it is a new trend to use light emitting diode (LED) as the light source of the backlight module. Furthermore, using light-emitting diodes as the light source of the backlight module has the advantages of high color saturation, thinness, and mercury-free, and the light-emitting diode backlight module can be further matched with the driving method of the liquid crystal panel for dynamic control. To compensate for the limitation of the viewing angle and response speed of the LCD panel, some manufacturers have applied the LED backlight module to the notebook computer screen and LCD TV (LCD TV).

Please refer to FIG. 1 , which is a schematic diagram of the arrangement of LEDs in the LED backlight module. The LED backlight module is formed by alternate arrangement of multiple red (R), green (G), and blue (B) LEDs, and the layout distance between the LEDs will also affect the actual color performance. Since the white light generated by red (R), green (G), and blue (B) light-emitting diodes is close to the wavelengths of the three primary colors of light, the liquid crystal display assembled by the light-emitting diode backlight module has high color saturation.

Please refer to FIG. 2 , which is a comparison diagram of the color gamut performance of a conventional CCFL backlight module and an LED backlight module. The area 100 in the figure represents a schematic diagram of a color space (color gamut), and the area 110 surrounded by a dotted line represents the range of colors that a known CCFL backlight module can represent, and the area 120 surrounded by a solid line is Represents the range of colors that can be represented by LED backlight modules. Obviously, it can be seen from FIG. 2 that the range of colors that the LED backlight module can represent is larger than that of the traditional CCFL backlight module.

However, there is still a gap between the color representation 120 of the LED backlight module and the color space of the area 100, so increasing the range of color representation of the LED backlight module and controlling the actual color representation of the LEDs are problems that LCD manufacturers want to solve today. .

A liquid crystal display with photodetectors having mounted thereon and its correcting method disclosed in US Patent No. US7,068,333. In this patent, a light detector is provided in a liquid crystal display between a backlight light source and a light shield in a backlight module. However, the light detector is located between the backlight light source and the light baffle and cannot detect the actual display brightness of the liquid crystal display, and the light detector cannot change according to the brightness of the periphery of the liquid crystal display. Furthermore, since the light detector can only detect the brightness of some areas in the backlight module, and cannot detect the brightness of all areas in the liquid backlight module, the detection result output by the light detector may be different from the actual backlight module. An error occurs in the brightness of the output.

Contents of the invention

The object of the present invention is to provide a liquid crystal display with an LED backlight module and a correction unit, which is used to increase the color performance range of the LED backlight module and use the light correction unit to accurately grasp the actual color performance of the LED backlight module.

The present invention proposes a liquid crystal display, comprising: a backlight module, the backlight module includes a light baffle plate and a light emitting diode backlight source, wherein the light emitting diode backlight light source at least includes multiple color light emitting diodes arranged alternately; a liquid crystal panel, the liquid crystal panel It includes a first polarizer, a liquid crystal, a thin-film transistor array substrate, and a second polarizer; wherein, the thin-film transistor array includes a plurality of neatly arranged pixels and multiple internal photodetectors, and each pixel includes a thin-film transistor, and a transparent electrode of indium tin oxide film; and a control circuit, the control circuit is connected to the backlight module and the liquid crystal panel, and the control circuit can generate a corresponding control voltage according to the image signal and use the scanning on the thin film transistor array substrate The line transmits the corresponding control voltage to the transparent electrode of the indium tin oxide film corresponding to the thin film transistor; and the control circuit can generate the first compensation according to the internal intensity and chromaticity signals generated by the internal photodetector The signal is sent to the LED backlight source; wherein, the first compensation signal can adjust the brightness or color of the LED backlight source.

The liquid crystal display above, wherein the light emitting diodes of multiple colors arranged alternately include red, green, blue, cyan, yellow, and magenta light emitting diodes; or red, green, blue, and white light emitting diodes.

The liquid crystal display above, wherein the liquid crystal display further includes an external light detector located on the outer frame of the liquid crystal display or on the remote control, and the external light detector is connected to the control circuit so that the control circuit can detect The ambient illuminance and chromaticity signals generated by the device generate a second compensation signal to the LED backlight source for adjusting the brightness or color of the LED backlight source, and the first compensation signal and the second compensation signal can make the The distribution ratio of each color of the light emitting diode is optimized.

The above liquid crystal display, wherein the liquid crystal panel further includes a glass substrate so that the external photodetector is located on the glass substrate of the liquid crystal panel or the thin film transistor array substrate, and the external photodetector includes a plurality of detection units, and makes The detection units are neatly arranged on the glass substrate or the thin film transistor array substrate.

Furthermore, the present invention proposes a liquid crystal display, including: a backlight module, the backlight module includes a light shield and a light emitting diode backlight source, wherein the light emitting diode backlight light source at least includes multiple colors of light emitting diodes arranged alternately; a liquid crystal panel, The liquid crystal panel includes a first polarizing plate, a glass substrate, a liquid crystal, a thin film transistor array substrate, and a second polarizing plate stacked in sequence; wherein, the glass substrate contains a plurality of neatly arranged internal photodetectors; and, a control circuit, the control circuit is connected to the backlight module and the liquid crystal panel, and the control circuit can generate a first compensation signal to the LED backlight source according to the internal intensity and chromaticity signals generated by the internal photodetector; wherein, The first compensation signal can adjust the brightness or color of the light emitting diode backlight.

The liquid crystal display above, wherein the LEDs of multiple colors arranged alternately include LEDs of red, green, blue, cyan, yellow, and magenta; or LEDs of red, green, blue, and white.

The liquid crystal display above, wherein the liquid crystal display further includes an external light detector located on the outer frame of the liquid crystal display or on the remote control, and the external light detector is connected to the control circuit so that the control circuit can detect The ambient illuminance and chromaticity signals generated by the device generate a second compensation signal to the LED backlight source for adjusting the brightness or color of the LED backlight source, and the first compensation signal and the second compensation signal can make the The distribution ratio of each color of the light emitting diode is optimized.

The above-mentioned liquid crystal display, wherein the external light detector is located on the glass substrate of the liquid crystal panel or the thin film transistor array substrate, and the external light detector includes a plurality of detection units, and the detection units are neatly arranged on the on the glass substrate or the thin film transistor array substrate.

Furthermore, the present invention proposes a liquid crystal display, including: a backlight module, the backlight module includes a light shield and a light emitting diode backlight source, wherein the light emitting diode backlight light source at least includes multiple colors of light emitting diodes arranged alternately; a liquid crystal panel, The liquid crystal panel includes a first polarizer, a liquid crystal, a thin film transistor array substrate, and a second polarizer; a plurality of internal photodetectors are located between the backlight light source and the liquid crystal panel so that the internal photodetectors can perform the backlight The brightness and color detection of all areas in the module or the brightness and color detection of the periphery of the liquid crystal display; and a control circuit, the control circuit is connected to the backlight module and the liquid crystal panel, and the control circuit can generate corresponding control according to the image signal Voltage and use the scanning line on the thin film transistor array substrate to transmit the corresponding control voltage to the transparent electrode of the corresponding indium tin oxide film on the thin film transistor; and the control circuit can be generated according to the internal photodetector The internal intensity and chromaticity signals generate a first compensation signal to the LED backlight source; wherein, the first compensation signal can adjust the brightness or color of the LED backlight source.

The liquid crystal display above, wherein the LEDs of multiple colors arranged alternately include LEDs of red, green, blue, cyan, yellow, and magenta; or LEDs of red, green, blue, and white.

The liquid crystal display above, wherein the liquid crystal display further includes an external light detector located on the outer frame of the liquid crystal display or on the remote control, and the external light detector is connected to the control circuit so that the control circuit can detect The ambient illuminance and chromaticity signals generated by the device generate a second compensation signal to the LED backlight source for adjusting the brightness or color of the LED backlight source, and the first compensation signal and the second compensation signal can make the The distribution ratio of each color of the light emitting diode is optimized.

The above liquid crystal display, wherein the liquid crystal panel further includes a glass substrate so that the external photodetector is located on the glass substrate of the liquid crystal panel or the thin film transistor array substrate, and the external photodetector includes a plurality of detection units, and makes The detection units are neatly arranged on the glass substrate or the thin film transistor array substrate.

Therefore, the internal photodetector proposed by the present invention can detect the intensity and chromaticity of all regions in the backlight module, and the intensity and chromaticity signals generated by it have a high degree of reliability, so that the first compensation signal output by the control circuit is more reliable. accurate. The invention provides a liquid crystal display with a light emitting diode backlight module and a correction unit, which increases the color performance range of the light emitting diode backlight module and uses the light correction unit to accurately grasp the actual color performance of the light emitting diode backlight module.

Description of drawings

FIG. 1 is a schematic diagram of an arrangement of light emitting diodes in a light emitting diode backlight module.

FIG. 2 is a comparison chart of color gamut performance of a conventional cold cathode lamp backlight module and an LED backlight module.

FIG. 3 is a schematic diagram of the structure of a liquid crystal display.

FIG. 4 is a schematic diagram of pixels on a thin film transistor array substrate.

FIG. 5A is a first embodiment of the arrangement of LEDs in the LED backlight module of the present invention.

FIG. 5B is a comparison chart of color gamut performance of the LED backlight module of the first embodiment.

FIG. 6 is a second embodiment of the arrangement of LEDs in the LED backlight module of the present invention.

FIG. 7 is a schematic diagram of an internal photodetector located on a thin film transistor array substrate.

FIG. 8 is a flowchart of the calibration between the internal photodetector and the backlight light source of the present invention.

FIG. 9 is a schematic diagram of an external light detector located outside the liquid crystal display.

FIG. 10 is a flowchart of the adjustment between the external light detector and the backlight light source of the present invention.

And, each reference numeral in the above-mentioned drawings is explained as follows:

100 color spaces

110 Color Range of Commonly Known Cold Cathode Lamp Backlight Modules

120 Color Ranges of Known Light Emitting Diode Backlight Modules

200 backlight module 202 light baffle

204 LED backlight source 210 LCD panel

212 first polarizer 214 glass substrate

216 liquid crystal 218 thin film transistor array substrate

219 second polarizer 230 thin film transistor

Transparent electrode of 235 indium tin oxide film 250 control circuit

260 color space

270 The range of colors displayed by the light-emitting diode backlight module in the first embodiment

280 Color ranges of known light-emitting diode backlight modules

310 Internal Photodetector 320 Thin Film Transistor

330 Indium Tin Oxide Transparent Electrode 410 External Light Detector

Detailed ways

Please refer to FIG. 3 , which is a schematic structural diagram of a liquid crystal display. The liquid crystal display can basically be divided into a backlight module 200 , a liquid crystal panel 210 , and a control circuit 250 . The backlight module 200 includes a light shielding plate 202 and an LED backlight source 204; wherein the light shielding plate 202 reflects the light emitted by the backlight source 204 to the liquid crystal panel 210 to increase and uniform the brightness of the liquid crystal display. The liquid crystal panel 210 includes a first polarizing plate (polarizing plate) 212, a glass substrate (glass substrate) 214, a liquid crystal (liquid crystal) 216, a thin-film transistor array substrate (thin-film transistor array substrate) 218, a first stacked in sequence. The polarizer 219 ; wherein, the liquid crystal 216 is sealed between the glass substrate 214 and the TFT array substrate 218 . Of course, some specific liquid crystal panels use color filters to replace the glass substrate 214 , that is, the liquid crystal 216 is sealed between the color filters and the TFT array substrate 218 .

Please refer to FIG. 4 , which is a schematic diagram of pixels on a TFT array substrate. The thin film transistor array substrate includes millions of thin film transistors (TFT) 230 and transparent electrodes 235 of Indium Tin Oxide film (Indium Tin Oxide) arranged neatly. Each thin film transistor 230 and its associated transparent electrode 235 of the ITO film can be regarded as a pixel, and a corresponding control voltage can be input to the transparent electrode through a scan line.

And when the image signal (image signal) enters the control circuit 250 through the image input terminal, the control circuit 250 can generate the corresponding control voltage and use the scanning line on the thin film transistor array substrate 218 to transmit the corresponding control voltage to the thin film transistor. Used to control the alignment of liquid crystals.

Please refer to FIG. 5A , which is a first embodiment of the arrangement of LEDs in the LED backlight module of the present invention. The light-emitting diode backlight module shown in the first embodiment utilizes a plurality of red (R), green (G), blue (B), cyan (Cyan), yellow (Yellow), magenta (Magenta) light-emitting diodes arranged alternately formed. And FIG. 5B is a comparison chart of the color gamut performance of the LED backlight module of the first embodiment. The area 260 in the figure represents a schematic diagram of a color space (color gamut), and the area 270 surrounded by a dotted line represents the range of colors that the LED backlight module of the first embodiment can represent, and the area 280 surrounded by a solid line represents The range of colors represented by LED backlight modules is known. Obviously, it can be seen from FIG. 5B that the LED backlight module of the first embodiment can display a wider range of colors than the traditional LED backlight module. That is to say, the liquid crystal display assembled with the LED backlight module according to the first embodiment of the present invention can display a wider color gamut and have higher color saturation.

Please refer to FIG. 6 , which is a second embodiment of the arrangement of LEDs in the LED backlight module of the present invention. The LED backlight module shown in the second embodiment is formed by a plurality of red (R), green (G), blue (B) and white (White) LEDs arranged alternately. The light-emitting diode backlight module of the second embodiment is mainly required to be used outdoors or for public use. For example, when the liquid crystal display is used outdoors, controlling the brightness of white LEDs can increase the brightness of the entire backlight module.

Of course, the present invention can also use Cyan, Yellow, Magenta, and White light-emitting diodes to be placed in the backlight module at the same time to achieve a backlight with a wider color gamut and higher brightness. module. Furthermore, the arrangement and number of the light emitting diodes can be changed according to requirements, and the present invention is not limited to the number and arrangement of the light emitting diodes.

Furthermore, in order to match the LED backlight modules of the first embodiment and the second embodiment and effectively control the color and brightness of the backlight light source, the liquid crystal display of the present invention further includes an internal light detector. Wherein, the internal photodetector located on the thin film transistor array substrate can be used to detect the intensity and chromaticity of all regions in the backlight module and provide the first compensation signal to the backlight light source, so that the backlight light source can produce proper color and brightness. Furthermore, as can be seen from the following description, the internal light detector of the present invention is not limited to the above-mentioned positions, and those skilled in the art can also design the internal light detector at other positions of the liquid crystal display.

Please refer to FIG. 7 , which is a schematic diagram of an internal light detector located on a TFT array substrate. The internal photodetector 310, the thin film transistor 320, and the transparent electrode 330 of the ITO film of the present invention can be regarded as a pixel. That is to say, the thin film transistor array substrate includes millions of internal photodetectors 310 , thin film transistors 320 and transparent electrodes 330 of indium tin oxide film arranged neatly. Under the control of the control circuit, the scanning line can input the corresponding control voltage to the transparent electrode, and the internal intensity and chromaticity signals received by the internal photodetector can also be transmitted to the control circuit through the sensing line, so that the control circuit The first compensation signal can be generated to the backlight light source according to the received internal intensity and chrominance signals.

Since the internal photodetector 310 is designed and neatly arranged on the thin film transistor array substrate, the internal photodetector can detect the intensity and chromaticity of all areas in the backlight module, so the intensity and chromaticity generated by the internal photodetector The signal has a high degree of reliability, so that the first compensation signal output by the control circuit is more accurate.

Of course, the above-mentioned example is to design the internal photodetector on the thin film transistor array substrate, and those skilled in the art can also design the internal photodetector on other places, such as designing on the glass substrate, and also can measure the intensity of all regions in the backlight module. and chromaticity detection; or, the same effect can also be achieved by designing the above-mentioned internal detector between the thin film transistor array substrate and the backlight module.

Please refer to FIG. 8 , which is a flowchart of the adjustment between the internal photodetector and the backlight light source of the present invention. First, the internal photodetector receives the light generated by the LED backlight source (352); then, the control circuit receives and analyzes the internal intensity and chromaticity signals of all internal photodetectors (354); the control circuit will analyze the first A compensation signal is input to the light-emitting diode backlight source (356); when the adjustment is successful (357), the distribution ratio of each color of the light-emitting diode is optimized (358); and, when the adjustment fails (357), return to step (354 ) receives the light intensity signal from the internal light detector again and analyzes it.

In addition to the internal light detector, the present invention also provides an external light detector located on the outer frame of the liquid crystal display to detect the illuminance and chromaticity of the periphery of the liquid crystal display and generate a second compensation signal to the backlight light source, so that the backlight light source can be based on the first Two compensation signals are used to adjust the color and brightness of the backlight source. Furthermore, it can be seen from the following description that the external light detector of the present invention is not limited to the above-mentioned position, and those skilled in the art can also design the external light detector at other positions of the liquid crystal display.

Please refer to FIG. 9 , which is a schematic diagram of an external light detector located outside the liquid crystal display. The external light detector 410 of the present invention can be designed on the outer frame of the liquid crystal display and connected to the control circuit to detect the illuminance and chromaticity of the periphery of the liquid crystal display and generate peripheral illuminance and chromaticity signals to the control circuit, so that the control circuit generates the first The second compensation signal is sent to the backlight source, so that the backlight source can adjust the brightness and chromaticity of the backlight source according to the second compensation signal.

Of course, in the above example, the external light detector is designed on the outer frame of the liquid crystal display, and those skilled in the art can also design the external light detector on other places, such as on the remote controller of the liquid crystal display, to carry out the control of the liquid crystal display. Peripheral illuminance and chromaticity. Alternatively, those skilled in the art can also use the technology of manufacturing internal photodetectors to design the external detector so that multiple detection units are neatly arranged on the glass substrate or thin film transistor array substrate, so that the external photodetector can be used to monitor the periphery of the liquid crystal display. The detection of illuminance and chromaticity enables the control circuit to generate a second compensation signal to the backlight source for adjusting the brightness and color of the backlight source.

Please refer to FIG. 10 , which is a flowchart of the adjustment between the external light detector and the backlight light source of the present invention. First, the external light detector generates peripheral illuminance and chromaticity signals to the control circuit (450) according to the peripheral brightness and color; then, the control circuit receives and analyzes the peripheral illuminance and chromaticity signals of the external light detector (452); the control circuit Inputting the second compensation signal of the analysis result into the LED backlight source (454); according to the second compensation signal, the brightness and chromaticity of each color of the LED are optimized (456).

Therefore, the advantage of the present invention is to provide a liquid crystal display with an LED backlight module and a calibration unit to increase the color range of the LED backlight module and use the light calibration unit to accurately grasp the actual color performance of the LED backlight module.

In summary, although the present invention has been described above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. , Therefore, the protection scope of the present invention shall prevail as defined by the appended claims.

Claims (12)

1. LCD comprises:

Backlight module, this backlight module comprise light barrier and LED backlight light source, and wherein, this LED backlight light source comprises the light emitting diode of the multiple color of mutual arrangement at least;

Liquid crystal panel, this liquid crystal panel comprise the first polarization sheet, liquid crystal, thin-film transistor array base-plate, the second polarization sheet; Wherein, include the pixel of a plurality of proper alignment on this thin film transistor (TFT) array, a plurality of interior lights detecting devices, each this pixel comprises thin film transistor (TFT), reaches the transparency electrode of indium-tin oxide film; And

Control circuit, this control circuit is connected to this backlight module and this liquid crystal panel, and this control circuit can produce corresponding control voltage and utilize sweep trace on this thin-film transistor array base-plate corresponding control voltage to be sent to the transparency electrode of corresponding this indium-tin oxide film on this thin film transistor (TFT) according to picture signal; And this control circuit can produce first compensating signal to this LED backlight light source according to internal intensity and the carrier chrominance signal that described interior lights detecting device is produced;

Wherein, this first compensating signal can be adjusted the brightness or the color of this LED backlight light source.

2. LCD as claimed in claim 1, the light emitting diode of wherein mutual multiple color of arranging comprise redness, green, blueness, cyan, yellow, with carmine light emitting diode; Perhaps red, green, blue and white light-emitting diode.

3. LCD as claimed in claim 1, wherein this liquid display panel also comprises the exterior light detecting device that is positioned on this LCD housing or the telepilot, this exterior light detecting device is connected to this control circuit, make this control circuit to produce second compensating signal to brightness or the color of this LED backlight light source, and this first compensating signal and this second compensating signal can make the distribution proportion of described each color of light emitting diode reach optimization according to peripheral illumination and the carrier chrominance signal that this exterior light detecting device is produced in order to adjust this LED backlight light source.

4. LCD as claimed in claim 1, wherein this liquid crystal panel comprises that also glass substrate makes the exterior light detecting device be positioned on this glass substrate or this thin-film transistor array base-plate of this liquid crystal panel, and this exterior light detecting device comprises a plurality of detecting units, and makes neat being arranged on this glass substrate or this thin-film transistor array base-plate of described detecting unit.

5. LCD comprises:

Backlight module, this backlight module comprise light barrier and LED backlight light source, and wherein, this LED backlight light source comprises the light emitting diode of the multiple color of mutual arrangement at least;

Liquid crystal panel, this liquid crystal panel comprise the first polarization sheet, glass substrate, liquid crystal, thin-film transistor array base-plate, the second polarization sheet that piles up in regular turn; Wherein, the interior lights detecting device that includes a plurality of proper alignment on this glass substrate; And

Control circuit, this control circuit are connected to this backlight module and this liquid crystal panel, and this control circuit can produce first compensating signal to this LED backlight light source according to internal intensity and the carrier chrominance signal that described interior lights detecting device is produced;

Wherein, this first compensating signal can be adjusted the brightness or the color of this LED backlight light source.

6. LCD as claimed in claim 5, the light emitting diode of wherein mutual multiple color of arranging comprise redness, green, blueness, cyan, yellow, with carmine light emitting diode; Perhaps red, green, blue, with the light emitting diode of white.

7. LCD as claimed in claim 5, wherein this liquid display panel also comprises the exterior light detecting device that is positioned on this LCD housing or the telepilot, this exterior light detecting device is connected to this control circuit, make this control circuit to produce second compensating signal to brightness or the color of this LED backlight light source, and this first compensating signal and this second compensating signal can make the distribution proportion of described each color of light emitting diode reach optimization according to peripheral illumination and the carrier chrominance signal that this exterior light detecting device is produced in order to adjust this LED backlight light source.

8. LCD as claimed in claim 5, wherein the exterior light detecting device is positioned on this glass substrate or this thin-film transistor array base-plate of this liquid crystal panel, and this exterior light detecting device comprises a plurality of detecting units, and makes neat being arranged on this glass substrate or this thin-film transistor array base-plate of described detecting unit.

9. LCD comprises:

Backlight module, this backlight module comprise light barrier and LED backlight light source, and wherein, this LED backlight light source comprises the light emitting diode of the multiple color of mutual arrangement at least;

Liquid crystal panel, this liquid crystal panel comprise the first polarization sheet, liquid crystal, thin-film transistor array base-plate, the second polarization sheet;

A plurality of interior lights detecting devices make described interior lights detecting device can carry out the brightness of All Ranges in this backlight module and the brightness and the color detection of color detection or this LCD periphery between this back light and this liquid crystal panel; And

Control circuit, this control circuit is connected to this backlight module and this liquid crystal panel, and this control circuit can produce corresponding control voltage and utilize sweep trace on this thin-film transistor array base-plate corresponding control voltage to be sent to the transparency electrode of corresponding this indium-tin oxide film on this thin film transistor (TFT) according to picture signal; And this control circuit can produce first compensating signal to this LED backlight light source according to internal intensity and the carrier chrominance signal that described interior lights detecting device is produced;

Wherein, this first compensating signal can be adjusted the brightness or the color of this LED backlight light source.

10. LCD as claimed in claim 9, the light emitting diode of wherein mutual multiple color of arranging comprise redness, green, blueness, cyan, yellow, with carmine light emitting diode; Perhaps red, green, blue, with the light emitting diode of white.

11. LCD as claimed in claim 9, wherein this liquid display panel also comprises the exterior light detecting device that is positioned on this LCD housing or the telepilot, this exterior light detecting device is connected to this control circuit, make this control circuit to produce second compensating signal to brightness or the color of this LED backlight light source, and this first compensating signal and this second compensating signal can make the distribution proportion of described each color of light emitting diode reach optimization according to peripheral illumination and the carrier chrominance signal that this exterior light detecting device is produced in order to adjust this LED backlight light source.

12. LCD as claimed in claim 9, wherein this liquid crystal panel comprises that also glass substrate makes the exterior light detecting device be positioned on this glass substrate or this thin-film transistor array base-plate of this liquid crystal panel, and this exterior light detecting device comprises a plurality of detecting units, and makes neat being arranged on this glass substrate or this thin-film transistor array base-plate of described detecting unit.

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