CN104205202B - Display device and radiotelevisor - Google Patents
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- CN104205202B CN104205202B CN201380012711.4A CN201380012711A CN104205202B CN 104205202 B CN104205202 B CN 104205202B CN 201380012711 A CN201380012711 A CN 201380012711A CN 104205202 B CN104205202 B CN 104205202B
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Abstract
A kind of display device and radiotelevisor are provided, there is the function of local dimming, and the high color range of gray level image can be kept.The display device of the brightness in the multiple regions after image has been carried out segmentation can be adjusted individually by local dimming, in the case of display multicolor image (coloured image), perform local dimming, in the case of display gray level image, do not perform local dimming.Additionally, display device is in the case of display is mixed with the mixed image of multicolor image and gray level image, the region (42) comprising gray level image in multiple regions in the picture does not perform local dimming.Take into account the display of the multicolor image of high-contrast and the display of the gray level image of high color range.
Description
Technical field
The present invention relates to use direct-type backlight and show display device and the radiotelevisor of image.
Background technology
Liquid crystal indicator is widely used in the display of computer, radiotelevisor and for showing
In information display showing various information etc..Liquid crystal indicator possesses: employ liquid crystal display floater,
With the backlight this display floater being illuminated from the back side.In liquid crystal indicator, as backlight, make
It is used in the device that the rear side of display floater is configured with the direct-type backlight of light source.Particularly, have LED
Multiple light sources of (light emitting diode) etc. are arranged in the backlight of the rear side of display floater, possess this backlight
Liquid crystal indicator can perform local dimming (ロ カ Le デ ィ ミ Application グ) to improve image quality.
Local dimming is to cooperate with shown image, and the brightness to each light source comprised in backlight is carried out individually
The technology controlled.The luminance part of shown image can be changed by local dimming, energy
Enough improve the contrast of image.(Japanese) JP 2010-257603 publication discloses local dimming
The example of technology.
Summary of the invention
The problem that invention is to be solved
Present display device has an opportunity to show multicolor image and the gray level image of monochrome (black and white).Ash
The color range of degree image is more identified than multicolor image, for needing the field of high color range.Such as,
Commonly used gray level image in the therapeutic medical image of roentgen radiation photograph or echo etc..It addition,
Display device has an opportunity to show the gray level image of monochromatic film etc..Generally, due to the light comprised in backlight
The number in source is fewer than the number of the pixel comprised in the image shown in display device, therefore can pass through
Local dimming in picture and change and the least unit of brightness comprise multiple pixel.Therefore, in order to increase
The light and shade of a part for strong image and in the case of having carried out local dimming, produce and should strengthen in image at ratio
The phenomenon being referred to as halation (Ha ロ) that is changed of the part wide range brightness of light and shade.Although
In multicolor image, even if producing halation, the impact on image quality is the least, but, in gray level image, deposit
In situations below: creating the part of halation, the high color range of image is compromised.Such as, in medical treatment
Image in create halation in the case of, it is impossible to show between high light part and dash area is trickle
Color range, have diagnosis and treatment accurately become difficulty misgivings.
The present invention completes in view of this situation, its object is to, it is provided that a kind of function possessing local dimming,
And display device and the radiotelevisor of the high color range of gray level image can be kept.
For solving the means of problem
Display device involved in the present invention is possessed to be adjusted individually by local dimming and has carried out image point
The adjustment portion of the brightness in the multiple regions after cutting, and coloured image and gray level image can be shown, its
In, described display device possesses: the 1st detection unit, it is determined that the image that should show is coloured image or ash
Degree image, described adjustment portion, in the case of the image that should show is coloured image, is entered by local dimming
The adjustment of the brightness of row image, in the case of the image that should show is gray level image, is not adjusted by local
Light carries out the adjustment of the brightness of image.
Display device involved in the present invention is also equipped with: the 2nd detection unit, for judging the image that should show
It it is whether the mixed image of coloured image and gray level image；And the 1st determine portion, for showing
In the case of image is mixed image, determine the region comprising gray level image in the plurality of region, institute
State adjustment portion and determine that region determined by portion does not carry out the tune of brightness based on local dimming to the described 1st
Whole.
In display device involved in the present invention, described 2nd detection unit calculating is made up of multiple pixels
The colour element comprised in the image that should show and the number of monochromatic pixel are relative to whole number of pixels
Ratio, at colour element number and monochromatic number of pixels relative to the ratio of whole number of pixels all in advance
First it is determined as less than in the case of more than the threshold value of the value of 50%, it is determined that the image for showing is combination chart
Picture.
Display device involved in the present invention is also equipped with: for determining in the region not comprising gray level image
Portion, described adjustment portion is determined with the 2nd of region close in the prescribed limit in the region comprising gray level image the
Determine that region determined by portion does not carry out the adjustment of brightness based on local dimming to the described 2nd.
In display device involved in the present invention, the described 2nd determines that portion determines is not comprising gray level image
Region in the region of area adjacency comprising gray level image.Display device involved in the present invention also has
Standby: the 1st gamma-corrected portion, carry out coloured image by the gamma characteristic of the coloured image of regulation
Gamma-corrected；And the 2nd gamma-corrected portion, by meeting the grey scale specified by dicom standard
The gamma characteristic of function carries out the gamma-corrected of gray level image.
Display device involved in the present invention is also equipped with: the 3rd gamma-corrected portion, about at described combination chart
The colour element comprised in Xiang carries out gamma-corrected by the gamma characteristic of the coloured image of regulation, closes
In the monochromatic pixel comprised in described mixed image by meeting the gray scale specified by dicom standard
The gamma characteristic of quasi-function carries out gamma-corrected.
Display device involved in the present invention is also equipped with: liquid crystal panel, is used for showing image；And backlight,
Multiple light sources are configured to rectangular, from rear side, described liquid crystal panel are illuminated, described adjustment portion
In order to carry out local dimming, the brightness to multiple control areas is adjusted individually, the plurality of control zone
Territory is the multiple control areas being split the plurality of light source comprised in described backlight.The present invention
Involved radiotelevisor possesses: display device involved in the present invention and receiving television broadcasting
Tuner, based on the television broadcasting received by described tuner, on said display means to image
Show.
In the present invention, it is possible to the display device carrying out local dimming is held in the case of display multicolor image
Row local dimming, does not perform local dimming in the case of display gray level image.
Additionally, in the present invention, display device is mixed with the mixed of multicolor image and gray level image in display
In the case of closing image, comprise in mixed image and the region of gray level image does not perform local dimming.
Additionally, in the present invention, close with the region comprising gray level image close to district in mixed image
In territory, display device does not the most perform local dimming.
Additionally, display device carries out the gamma-corrected of multicolor image by the gamma characteristic of multicolor image,
On the other hand, carry out the gamma-corrected of gray level image by meeting the gamma characteristic of grey scale function,
Make it possible to show therapeutic medical image.
The effect of invention
The present invention serves such as inferior good effect: in the present invention, shown by local dimming
The multicolor image of high-contrast, on the other hand, when showing gray level image, image quality will not be adjusted due to local
Halation that light causes and deteriorate, show gray level image with high color range.
Accompanying drawing explanation
Fig. 1 is the block diagram of the electric function structure representing display device.
Fig. 2 is the schematic diagram representing the multiple regions being split image.
Fig. 3 is the flow chart of the step of the process of the display device execution representing the present invention.
Fig. 4 is the schematic diagram of the example of the scope representing gray level image.
Fig. 5 is the schematic diagram of the example representing the region comprising gray level image.
Fig. 6 is the schematic diagram of the example representing access areas.
Fig. 7 is the schematic nature figure of the example representing gamma characteristic.
Detailed description of the invention
The present invention is specifically described below based on the accompanying drawing representing embodiments of the present invention.
Fig. 1 is the block diagram of the electric function structure representing display device.Display device is as television reception
Machine or display and use.Display device possesses: the liquid crystal panel 1 of rectangle and the backlight 2 of straight-down negative.
Backlight 2 is configured to light-emitting area towards liquid crystal panel 1, from rear side pair in the rear side of liquid crystal panel 1
Liquid crystal panel 1 is illuminated.Backlight 2 by multiple LED with the rectangular back side being arranged in liquid crystal panel 1.
Display device is by being controlled individually the brightness of the LED comprised in backlight 2 such that it is able to pass through
Local dimming adjusts the bright of the multiple regions split of image to display in liquid crystal panel 1 individually
Degree.It addition, backlight 2 can also be the form using the light source beyond the LED such as optical fiber.
Source electrode driver 11 and gate drivers 12 for driving liquid crystal are connected to liquid crystal panel 1.
Source electrode driver 11 and gate drivers 12 are connected to the timing of the driving for controlling liquid crystal
LCD timing controller 13.For making the LED driver 21 of each LED action in backlight 2 be connected
Receive backlight 2.The LED that LED driver 21 is connected to the timing of the action for controlling LED is fixed
Time controller 22.
Display device possesses: from the outside through the picture signal input unit by various interface received image signals
35 and receive the broadcast wave of TV and generate the tuner 36 of picture signal.It addition, display device is also
Can be to be the form not possessing tuner 36.Picture signal input unit 35 and tuner 36 are connected to
Picture signal process portion 34, is input to picture signal process portion 34 by picture signal.Picture signal process portion
34 pairs of picture signals carry out the conversion of picture size or the signal processing of the superposition etc. of character.Picture signal
Process portion 34 is connected to color signal correction portion 33, and picture signal is input to color signal correction portion
33.Color signal correction portion 33 carries out the adjustment of chroma or the adjustment of acutance etc. for adjusting to picture signal
The process of whole image quality.Color signal correction portion 33 is connected to LCD/LED data processing division 32, will figure
Image signal is input to LCD/LED data processing division 32.Additionally, LCD timing controller 13 and LED
Timing controller 22 is connected to LCD/LED data processing division 32.LCD/LED data processing division 32
According to picture signal, generate for making the video data of liquid crystal panel 1 action and for making backlight 2 action
Light data, video data is input to LCD timing controller 13, data will be lighted and be input to LED
Timing controller 22.LCD timing controller 13 controls the timing of the driving of liquid crystal based on video data.
LED timing controller 22 timing based on the action lighting Data Control LED.
Additionally, display device possesses the control portion 31 for controlling each several part.Control portion 31 such as comprises
CPU and constitute.Accept the operating portion 37 of the operation of user and receive from not shown remote controller
The acceptance division 38 of control signal be connected to control portion 31.It addition, display device can also be not have
The form of standby acceptance division 38.
The rectangular multiple LED that are configured to comprised in backlight 2 are divided into and can carry out brightness individually
Multiple control areas of adjustment.One control area can only comprise a LED, it is also possible to comprise
Multiple LED.The image of liquid crystal panel 1 display is divided into by the multiple control areas comprised in backlight 2
The multiple region being illuminated.Fig. 2 is the signal representing the multiple regions being split image
Figure.Show in phantom the border in the region comprised in the image of rectangle in fig. 2.Image Zhong Ge district
Territory and the control area one_to_one corresponding of backlight 2.In liquid crystal panel 1, from each region pair image
Each region in image is shown by the part that the control area of the backlight 2 answered is illuminated.Such as, exist
Backlight 2 is divided into the control area of 16 × 8, and liquid crystal panel 1 shows the figure of 1920 × 1080 pixels
In the case of Xiang, each region in the picture comprises the pixel of 120 × 135.By being individually controlled the back of the body
The brightness of the control area of light 2, thus adjust the local of the brightness in each region in image individually
Light modulation.
The process of local dimming is carried out by LCD/LED data processing division 32.LCD/LED data
Process portion 32 determines the brightness in each control area in backlight 2 individually.Such as, LCD/LED number
Big brightness is obtained, by each control area according among the image in each region from image, the process portion 32
Brightness decision be the value obtaining calculated brightness.LCD/LED data processing division 32 will be determined
The value of the brightness in each control area is input to LED timing controller 22, thus adjusts the brightness of backlight 2.
Additionally, LCD/LED data processing division 32 calculates the luminance transformation in each control area in backlight 2
Luminance Distribution for the backlight 2 of the resolution identical with liquid crystal panel 1.Additionally, at LCD/LED data
Reason portion 32 carries out gamma-corrected to picture signal.And then, LCD/LED data processing division 32 is based on gamma
Revised picture signal and the Luminance Distribution of backlight 2, carry out generating to show in liquid crystal panel 1
Image and for making the process of video data of liquid crystal panel 1 action.
Fig. 3 is the flow chart of the step of the process of the display device execution representing the present invention.At picture signal
The reason portion 34 picture signal to being inputted, it is determined that each pixel comprised in image is polychrome pixel (color images
Element) or monochromatic pixel (monochrome pixels) (S1).In step sl, picture signal process portion 34 counts
Calculate maximum and the difference of minima of R (red) G (green) B (blue) signal of each pixel, prerequisite with pre-
Fixed threshold value compares, thus judges.If the maximum of rgb signal is set to max (R,
G, B), minima is set to min (R, G, B), threshold value is set to THa, then picture signal processes
Portion 34 is in the case of max (R, G, B)-min (R, G, B) >=THa, it is determined that for pixel
It it is polychrome pixel.Additionally, picture signal process portion 34 max (R, G, B)-min (R, G,
B) in the case of ＜ THa, it is determined that be monochromatic pixel for pixel.Threshold value Tha is decided to be at filtergram
Element being capable of detecting when, rgb signal is the value of the situation of identical value, is stored in advance in picture signal and processes
Portion 34.Such as, in the case of each RGB is indicated by 8 bits, THa=20.It addition,
In step S1, it is also possible to be that picture signal process portion 34 calculates the absolute of the assorted difference of rgb signal
Value, compares with threshold value, thus judges.Alternatively, it is also possible to be that picture signal process portion 34 leads to
The known method crossing other carries out the judgement of pixel.
Picture signal process portion 34 is the most respectively to the polychrome pixel comprised in image and monochromatic pixel
Number carries out counting (S2).Picture signal process portion 34 subsequently determines that image that picture signal represents whether
It is that the mixed image of multicolor image (coloured image) and gray level image is (by colour element and gray-scale map
Image as constituting) (S3).In step s3, picture signal process portion 34 calculates polychrome number of pixels
And monochrome number of pixels is relative to the ratio of whole number of pixels, carries out with the 1st threshold value predetermined
Relatively.1st threshold value is decided to be the value less than the 50% of whole number of pixels, is stored in advance in image
In information treatment part 34.Such as, the 1st threshold value is 25%.At polychrome number of pixels relative to whole pictures
Prime number purpose ratio and monochromatic number of pixels relative to the ratio of whole number of pixels all in the 1st threshold value
In the case of above, picture signal process portion 34 is judged to that image is mixed image.In any one ratio
In the case of the 1st threshold value, picture signal process portion 34 is judged to that image is not mixed image.
In the case of image is mixed image (S3: "Yes"), picture signal process portion 34 determines image
In the scope of gray level image, determine and comprise ash in multiple regions corresponding with the control area of backlight 2
The region (S4) of degree image.In step s 4, picture signal process portion 34 is first to the polychrome in image
Number of pixels and monochromatic number of pixels compare.Multicolor image number in the picture is filtergram prime number
In the case of more than mesh, picture signal process portion 34 is then carried out for determining gray level image in image
The process of scope.Picture signal process portion 34 is from image zooming-out monochrome pixel continuous print list in the direction of the x axis
Color lump continuous print part in the y-axis direction, calculate the x coordinate of the left end of part extracted variance and
The variance of the x coordinate of right-hand member.Situation below the 2nd threshold value that value is regulation of the variance calculated
Under, it is determined that it is rectangle and the scope of gray level image in the picture for multiple monochromatic blocks.Additionally, image letter
Number process portion 34 calculates the meansigma methods of the x coordinate of the left end of multiple monochromatic block and the x of the left end of each monochromatic block
The difference of coordinate, by except difference be regulation the 3rd threshold value more than coordinate in addition to and be positioned at the leftmost side
X coordinate be determined as the border in left side of scope of gray level image.Similarly, the model of gray level image is determined
The border on the right side enclosed, picture signal process portion 34 determines the scope of gray level image.Now, there is also really
The situation of fixed multiple scopes.In the case of the value of variance is bigger than the 2nd threshold value, picture signal process portion
34 using respective monochromatic block as the scope of gray level image.Polychrome number of pixels in the picture compares filtergram
In the case of prime number mesh is less, picture signal process portion 34 determines the model of multicolor image by same method
Enclose, using the scope beyond multicolor image as the scope of gray level image.Picture signal process portion 34 is the most true
The region comprising gray level image in being scheduled on multiple regions corresponding with the control area of the backlight 2 in image.
It addition, picture signal process portion 34 can also determine, by other method, the region comprising gray level image.
Additionally, picture signal process portion 34 can also be determined the process in the region of the shape beyond rectangle.
Fig. 4 is the schematic diagram of the example of the scope 41 representing gray level image.Figure 4 illustrates in mixing
Image only exists the example of the scope 41 of the gray level image of a rectangle.Fig. 5 is to represent to comprise ash chromatic graph
The schematic diagram of the example in the region 42 of picture.It is shown in solid the scope 41 of gray level image in Figure 5
Border.Generally, the border of the scope 41 of gray level image is inconsistent with the border in each region, therefore, comprises
The scope in multiple regions 42 of gray level image is wider than the scope 41 of gray level image.
Picture signal process portion 34 then determine in the multiple regions corresponding with the control area of backlight 2 with
In the prescribed limit in the region 42 comprising gray level image close close to (adjoining) region (S5).Such as,
Picture signal process portion 34 is adjacent with the region 42 comprising gray level image in not comprising the region of gray level image
The region connect is defined as access areas.Fig. 6 is the schematic diagram of the example representing access areas 43.Comprising
There is multiple access areas 43 in the surrounding in multiple regions 42 of gray level image.It addition, picture signal processes
Portion 34 can also will be defined as than with adjacent wider array of region, region, region 42 and comprise gray level image
The access areas 43 that the prescribed limit in region 42 is close.
Picture signal process portion 34 then would indicate that determined by comprise gray level image region 42 and connect
The data of near field 43 are input to control portion 31.Control portion 31 is handled as follows (S6): make LCD/LED
Data processing division 32 forbids that the local in the region 42 comprising gray level image and access areas 43 is adjusted
Light.In step s 6, control portion 31 would indicate that the region 42 and access areas comprising gray level image
The data of 43 are input to LCD/LED data processing division 32.LCD/LED data processing division 32 will be with bag
In multiple control areas in region 42 containing gray level image and the backlight 2 of access areas 43 correspondence
Brightness adjustment is the certain brightness predetermined.Therefore, in liquid crystal panel 1, in display image
The region 42 comprising gray level image and the part of access areas 43 are carried out with uniform brightness by backlight 2
Illumination.On the other hand, LCD/LED data processing division 32 comprises ash about in the multiple regions in image
Region beyond the region 42 of degree image and access areas 43, carries out the process of local dimming.
LCD/LED data processing division 32 then carries out gamma to the picture signal inputted by different pixels
Revise (S7).More specifically, about polychrome pixel by the gamma predetermined for multicolor image
Characteristic carries out gamma-corrected, special by the gamma predetermined for gray level image about monochromatic pixel
Property carries out gamma-corrected.The gamma characteristic of multicolor image is the gamma characteristic of such as γ=2.2.Gray scale
The gamma characteristic of image is to meet DICOM (Digital Imaging and Communication in
Medicine, digital imaging and communications in medicine) GSDF (grey scale function: the Grayscale that specifies of standard
Standard Display Function, grey scale explicit function) gamma characteristic.Dicom standard is
Define form and the standard of communication protocol of medical image for roentgen radiation photograph etc..GSDF
It is determined and enables to show the light and shade comprised in medical image accurately.
Fig. 7 is the schematic nature figure of the example representing gamma characteristic.The transverse axis of Fig. 7 represents picture signal
Input, the longitudinal axis represents the brightness of shown pixel.The gamma of γ=2.2 is represented in the figure 7 with solid line
Characteristic, is represented by dotted lines the gamma characteristic meeting GSDF.In the gamma characteristic meeting GSDF, quilt
Determine so that compared with the gamma characteristic of γ=2.2, the change of the brightness of image more low-light level is the trickleest,
The change of brightness more high brightness is the biggest.Therefore, in gray level image, compared with multicolor image, more high-precision
The light and shade of the part that the performance of degree ground is dark, more strengthens the light and shade of bright part.
Picture signal after gamma-corrected then is performed to be used for showing figure by LCD/LED data processing division 32
As required process, show mixed image.Display device is by terminating to process above.
In the case of image is not mixed image in step s3 (S3: "No"), picture signal process portion
Whether the image that 34 process decision chart image signals represent is gray level image (S8).In step s 8, picture signal
Process portion 34 is more than the 1st threshold value at monochromatic number of pixels relative to the ratio of whole number of pixels, and many
In the case of color pixel number is less than the 1st threshold value relative to the ratio of whole number of pixels, it is determined that for image
It it is gray level image.Additionally, picture signal process portion 34 at polychrome number of pixels relative to whole number of pixels
Ratio be more than the 1st threshold value, and monochromatic number of pixels relative to the ratio of whole number of pixels less than the
In the case of 1 threshold value, it is determined that be multicolor image for image.
In the case of image is gray level image (S8: "Yes"), picture signal process portion 34 would indicate that figure
The data seeming gray level image are input to control portion 31, and control portion 31 carries out making LCD/LED data process
Portion 32 forbids the process (S9) of local dimming.In step s 9, LCD/LED data processing division 32 is not
Carry out the process of local dimming, but be in advance by the brightness adjustment in the whole control areas in backlight 2
The certain brightness determined.Therefore, liquid crystal panel 1 is illuminated with uniform brightness by backlight 2.
LCD/LED data processing division 32 is then to the picture signal inputted, by meeting the gamma of GSDF
Feature carries out gamma-corrected (S10).LCD/LED data processing division 32 is then to the figure after gamma-corrected
Image signal performs, for showing the process needed for image, to show gray level image.Display device by above and
End processes.
In step s 8 in the case of image is multicolor image (S8: "No"), picture signal process portion
34 would indicate that image is that the data of multicolor image are input to control portion 31, and control portion 31 makes
LCD/LED data processing division 32 performs the process (S11) of local dimming.In step s 11, LCD/LED
Data processing division 32, in order to perform local dimming, carries out determining individually in backlight 2 according to picture signal
Each control area in the process of brightness.LCD/LED data processing division 32 is then to the figure inputted
Image signal carries out gamma-corrected (S12) by the gamma characteristic of multicolor image.At LCD/LED data
Picture signal after gamma-corrected is then performed for showing the process needed for image by reason portion 32, and display is many
Color image.Display device is by terminating to process above.
Alternatively, it is also possible to be display device in step S6, S9 and S11, display is used for selecting prohibiting
Stopping or perform the selection picture of local dimming, operating portion 37 or remote controller are operated by user,
Thus carry out the process forbidden or perform for determining local dimming.Carrying out the aobvious of such process
In showing device, user selects forbid or perform local dimming, so that user can determine image quality.
As described the most in detail, in the present embodiment, display device is in the case of display multicolor image
Perform local dimming, in the case of display gray level image, do not perform local dimming.Gray level image is not carried out
Local dimming and be shown, therefore, there is no the halation that image quality causes due to local dimming and situation about deteriorating,
High color range ground display gray level image.Particularly, it is possible to high color range ground shows therapeutic medical image, carries out base
Diagnosis accurately in image.On the other hand, in the case of display multicolor image, carry out local dimming,
Therefore the multicolor image of high-contrast is shown.Furthermore it is possible to carry out power saving by local dimming.
Additionally, display device is mixed with the situation of the mixed image of multicolor image and gray level image in display
Under, comprise in mixed image and the region of gray level image does not perform local dimming.Ash in mixed image
Degree image does not carries out local dimming and is shown, even if being therefore mixed with multicolor image and gray level image,
The highest color range ground display gray level image.
Additionally, in the access areas close with comprising the region of gray level image in mixed image of display device,
The most do not perform local dimming.From the light of each control area of backlight 2 not only to corresponding with control area
Region is illuminated, and also escapes to the region of periphery.Therefore, if in the region comprise gray level image not
Perform local dimming and perform local dimming in access areas, there are following misgivings: due to from access areas
The light that spills and on gray level image, produce halation.By the most not performing local dimming in access areas, from
And on gray level image, it is more difficult to produce halation, high color range ground display gray level image.
Additionally, display device carries out the gamma-corrected of gray level image by meeting the gamma characteristic of GSDF,
The gamma-corrected of multicolor image is carried out by the gamma characteristic of multicolor image.Display device can with
Join the color range of the multicolor image of high-contrast and show multicolor image, on the other hand, it is possible to show accurately
Show the therapeutic medical gray level image of roentgen radiation photograph etc..Therefore, display device can be used in curing accurately
Treat diagnosis.
It addition, in the present embodiment, it is shown that control portion 31, LCD/LED data processing division 32,
Color signal correction portion 33 and the form being individually the most independent hardware in picture signal process portion 34,
It may also be display device performs these shapes processing the process that circuit should perform by other method
Formula.For example, it is also possible to be that display device possesses DSP (Digital Signal Processor, digital signal
Processor), perform control portion 31, LCD/LED data processing division by the software processes in DSP
32, the form of the process that color signal correction portion 33 and picture signal process portion 34 should perform.Additionally,
Can also be the display device form that possesses following hardware, this hardware be by control portion 31, LCD/LED number
Collecting according to the function of process portion 32, color signal correction portion 33 and picture signal process portion 34 is one.
Additionally, display device is not limited to be shown as therapeutic medical image the form of gray level image, it is possible to
Being to show that the X-ray transmission photograph of arbitrary object, monochromatic film or monochrome etc. are therapeutic medical
The form of the gray level image beyond image.
Claims (9)
1. a display device, described display device possesses and adjusts individually to enter image by local dimming
The adjustment portion of the brightness in the multiple regions gone after splitting, and coloured image and gray-scale map can be shown
Picture, wherein,
Described display device possesses: the 1st detection unit, it is determined that the image that should show is coloured image or ash
Degree image,
Described adjustment portion, in the case of the image that should show is coloured image, carries out figure by local dimming
The adjustment of the brightness of picture, in the case of the image that should show is gray level image, is not entered by local dimming
The adjustment of the brightness of row image.
2. display device as claimed in claim 1, wherein,
Described display device is also equipped with:
2nd detection unit, it is determined that whether the image that should show is the mixed image of coloured image and gray level image；
And
1st determines portion, in the case of the image that should show is mixed image, determines in the plurality of district
The region of gray level image is comprised in territory,
To the described 1st, described adjustment portion determines that region determined by portion does not carries out brightness by local dimming
Adjust.
3. display device as claimed in claim 2, wherein,
Described 2nd detection unit calculates the colour element comprised in the image that should show being made up of multiple pixels
And the number of monochrome pixel is relative to the ratio of whole number of pixels, in colour element number and monochrome
Number of pixels relative to whole number of pixels ratio all predetermine for the value less than 50% threshold value with
In the case of on, it is determined that the image for showing is mixed image.
4. display device as claimed in claim 2 or claim 3, wherein,
Described display device is also equipped with: the 2nd determines portion, determine in the region not comprising gray level image with
Region close in comprising the prescribed limit in the region of gray level image,
To the described 2nd, described adjustment portion determines that region determined by portion does not carries out brightness by local dimming
Adjust.
5. display device as claimed in claim 4, wherein,
Described 2nd determines the region that portion determines in the region not comprising gray level image and comprises gray level image
Adjacent region.
6. the display device as described in any one of claims 1 to 3, wherein,
Described display device is also equipped with:
1st gamma-corrected portion, carries out coloured image by the gamma characteristic of the coloured image of regulation
Gamma-corrected；And
2nd gamma-corrected portion, by meeting the gamma of the grey scale function specified by dicom standard
Characteristic carries out the gamma-corrected of gray level image.
7. display device as claimed in claim 2 or claim 3, wherein,
Described display device is also equipped with:
3rd gamma-corrected portion, about the colour element comprised in the described mixed image coloured silk by regulation
The gamma characteristic of color image carries out gamma-corrected, about the filtergram comprised in described mixed image
Element carries out gamma-corrected by meeting the gamma characteristic of the grey scale function specified by dicom standard.
8. the display device as described in any one of claims 1 to 3, wherein,
Described display device is also equipped with:
Liquid crystal panel, is used for showing image；And
Multiple light sources are configured to rectangular by backlight, are illuminated described liquid crystal panel from rear side,
Described adjustment portion is in order to carry out local dimming, and the brightness to multiple control areas is adjusted individually,
The plurality of control area is the multiple controls being split the plurality of light source comprised in described backlight
Region.
9. a radiotelevisor, wherein,
Described radiotelevisor possesses:
The display device described in any one of claim 1～8；And
The tuner of receiving television broadcasting,
Based on the television broadcasting received by described tuner, on said display means image is carried out
Display.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012048372A JP5843662B2 (en) | 2012-03-05 | 2012-03-05 | Display device and television receiver |
| JP2012-048372 | 2012-03-05 | ||
| PCT/JP2013/054688 WO2013133061A1 (en) | 2012-03-05 | 2013-02-25 | Display device and television receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104205202A CN104205202A (en) | 2014-12-10 |
| CN104205202B true CN104205202B (en) | 2016-11-30 |
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