CN103730100A - Image luminance adjusting method of image display device - Google Patents
Image luminance adjusting method of image display device Download PDFInfo
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- CN103730100A CN103730100A CN201310704391.0A CN201310704391A CN103730100A CN 103730100 A CN103730100 A CN 103730100A CN 201310704391 A CN201310704391 A CN 201310704391A CN 103730100 A CN103730100 A CN 103730100A
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Abstract
The invention provides an image luminance adjusting method of an image display device. The image luminance adjusting method is characterized in that when a user inputs a power source starting command, a received image signal is displayed; when the user selects an image adjusting command, it is judged whether the user conducts selection to reduce luminance or improve the luminance; when a luminance reduction command is input, reasonable control over output of light and the image signal is carried out; when a luminance improving command is input, the image signal is strengthened. The image luminance adjusting method has the advantages that the magnitude and output of the image signal are controlled through the image display device of the light, the image luminance required by the user can be effectively controlled, reasonable control over the magnitude of the image signal and an output light source can be achieved, the aim of luminance adjusting of the user is accordingly achieved, various output functions of the light are sufficiently used for achieving the power consumption reduction purpose, the contrast ratio of the output image is obviously improved, and the good visual effect is achieved.
Description
Technical field
The present invention relates to a kind of picture brightness method of adjustment of image display.
Background technology
DLP (numeral) TV of rear-projection TV at present, what adopt can be to controlling separately, the semi-conductor chip of the digital micro-mirror device (hereinafter to be referred as DMD) of 1300000 above micro mirror compositions, at this moment, the white light that light source sends passes through, the reflection of the brightness scale image forming under the effect of each pixel of dmd chip demonstrates image on screen.
With reference to accompanying drawing, the DLP TV of conventional art is described as follows:
Fig. 1 is the DLP TV structure block diagram of conventional art, and Fig. 2 is the formation of the colour circle in Fig. 1 and the demonstration figure of operation thereof.
The DLP TV of conventional art as shown in the figure, consists of following structure: send white light light (15) and; White light that light (15) sends through set field, export R, G, B, color colour circle (1) and; Rotate above-mentioned colour circle (1) use motor (13) and; When motor (13) rotates, the induction part (2) that the light producing when through the inner set field (13a) of above-mentioned colour circle (1) is responded to and; The control signal of corresponding operating is carried out in output according to user's requirement, and output according to the picture signal receiving show the respective image micro computer (8) of control signal and; According to the control signal of micro computer (8), after the light that induction part (2) is sensed judges, for the corresponding color of view data that accurately embodiment has received regulate the index of use delay setting unit (3) and; Receive above-mentioned index and delay after the output and picture synchronization signal of setting unit (3), the phase difference detection portion of the poor use of detected phase and; Receive above-mentioned phase difference detection portion (4) detect phase differential after, above-mentioned motor (13) is rotated according to set speed, produce thus pwm signal PWM generating unit (5) and; According to the pwm signal of said PWM generating unit (5) output, give motor (13) output drive signal motor driving part (6) and; Receive image with portion's signal and view data after, convert to can display image signals data layout (7) and; Receive after the view data of conversion in above-mentioned data layout (7), by overall image be embodied in DMD (9) that display screen uses and; The reflection of corresponding color producing by colour circle (1), export the image that above-mentioned DMD (9) embodies prism (10) and; Show to the projection lens (11) of screen (12) output for the size that makes to conform to screen by the luminous energy of prism (10) and; According to the control signal of above-mentioned micro computer (8) to formations such as the ballast resistors (14) of light (15) output drive signal.
The operation instructions of the traditional DLP TV to formation like this is as follows:
When user turns on TV, micro computer (8) is to ballast resistor (14) output control signal and drive above-mentioned light (15), light (15) generates white light while driving, the white light that light (15) generates reproduces R, G, B color during set field by colour circle (1), and the color of this reproduction embodies via above-mentioned DMD (9) image of wanting demonstration.At this moment, as shown in Figure 2, R, G, the B pigment of above-mentioned colour circle (1) are respectively formed by 2 program segments, by 6 program segments, formed altogether, that is, above-mentioned colour circle (1) is divided into the program segment that has plated R, G, the each pigment of B and the part (part of not used during reproduced image) of not plating color between each color.
Colour circle rotates according to motor driving part (6) signal under the control (1) of micro computer (8), and above-mentioned induction part (2) is when colour circle (1) rotates, the light of the specified location by having arranged is responded to rear judgement rotational speed.
In addition, in order to embody exactly the corresponding color of view data of conversion in data layout (7), above-mentioned index is delayed setting unit (3) and is worked good lock in time according to colour circle (1) the rotational speed result of induction part (2) induction.
Also have, above-mentioned phase difference detection portion (4) receives after the output signal vertical synchronizing signal of delaying index setting unit (3), detect phase differential, and after the phase differential that PWM generating unit (5) detects with reference to phase difference detection portion (4), output makes motor (13) according to the pwm signal of set speed rotation.Above-mentioned motor driving part (6) is receiving after the pwm signal of PWM generating unit (5) output, the driving signal rotating according to set speed to motor (13) output.
When motor (13) drives, colour circle (1) also starts rotation, when light (15) generate white light through colour circle (1) the set field of R, G, B in a certain field time, wish that the color that obtains is by the reflection of prism (10), be presented on screen (12) after being embodied in the image data of DMD (9).
The colour circle (1) showing in Fig. 2 adds R, G, B play after 360 degree can being divided into 3 equal portions, or strengthen as the case may be the ratio to particular color, in 360 degree one circles, R, G, B can be set to occur once or secondary, while there is secondary, the angle of each merogenesis can diminish, but plays the effect that reduces motor rotational speed.
Also have, spot definition is the width that has been equivalent to pass through the light of projection lens, because when luminous point is in look boundary face, whole picture is not primitive color light, so do not use during common show image, be rejected, but, when being collected together, the light of whole boundary faces will become white light, and utilize this characteristic to increase brightness to display white part aspect in image.
Also have, index mark (13a) refers to, make the reach an agreement identification sign of use of the speed of colour circle and the vertical synchronizing signal of form and aspect position and picture signal, forming having of identification sign can light absorbing black belt or coating, and it is often attached to above the cylinder type main body that the reflection coefficient of motor is high.
Above-mentioned induction part (2), after mark transmitting infrared ray, the mode that the infrared ray of reflection is responded to, colour circle speed and form and aspect position are constantly responded to, and with the same period signal reach an agreement, above-mentioned index mark (13a), first colour circle is fixed on to motor shaft, then it is installed to set position, because its technique is different, there are some deviations in this position, if but while exceeding agreement scope, finally can not make picture signal and color reach an agreement, and the phenomenon that the color of occur flickering phenomenon or image is confused.
In order to address the above problem, drive in the chip of DMD (9) and be equipped with and be called the special resistance that colour circle index postpones, when manufacturing, limit sees that picture limit allows equipment remember that setting index after the error of index mark postpones.
The white light that above-mentioned light source (15) sends becomes monochromatic light after by colour circle (1), monochromatic light is input to DMD (9) through prism (10), and come back to prism (10) from the light of DMD (9) reflection, by the light of prism (10), the magnascope of using via formation large-screen, projection lens (11) arrives screen (12) and forms picture.
At this moment, the ON/OFF signal of controlling the inner each mirror of above-mentioned DMD (9) is to generate by view data, the view data of this input converts the binary system that is suitable for driving mirror in data layout (7), it is to postpone setting unit (3) output signal from index that the vertical synchronization signal of together inputting with view data is also input to the signal that the above-mentioned phase difference detector of above-mentioned phase difference detector (4) (4) receives in addition simultaneously, after the phase place of this signal and the image signal same period is compared, difference part input PWM generating unit (5), and the output of PWM generating unit (5) is input to motor driving part (6), , above-mentioned motor driving part (6) will produce, motor (13) the required signal of when rotation of colour circle (1) is housed, and motor (13) determine field and adhere to index mark (13a).
Also have, in near of index mark (13a), induction part (2) is housed, induction part is responded to and is drawn the speed of motor (13) and the information of form and aspect position by the light that is reflected of infrared ray of transmitting, the output of induction part (2) is input to above-mentioned index and postpones after setting unit (3), by index, postpone setting unit (3) amount that exceeds agreement scope is seen to picture limit adjusts with manual form limit, thereby the output of induction part (2) is played to delayed-action to a certain degree.
The output of the induction part (2) being delayed, is input to after above-mentioned phase difference detector (4), constantly carries out the correction of phase place with vertical synchronization.
The light that light source (21) sends is input to light engine (22) and converts to after R, G, B color, reflection by DMD (23) surface is input to projection lens (24), after expanding by projection lens (24), arrive screen, at this moment, the light that incides DMD (23) is adjusted into the form that covers whole of DMD (23), in addition, the inscape of DMD (23), be the ON/OFF control signal of mirror, by the output of scale-of-two order generating unit (29), converted the binary condition of R, G, B color to.
The switched primitive color light of this picture signal and light engine (2 two) output reaches synchronization, what above-mentioned scale-of-two order generating unit (29) received is, luminance signal (Y) and the colour difference signal (R-Y of picture signal handling part (27) output, B-Y), above-mentioned luminance signal (Y) is not directly to input to scale-of-two order generating unit (29), but according to the control signal of micro computer (26) after pixel parameter control part (28), input to scale-of-two order generating unit (29), at this moment, scale-of-two order generating unit (29) just becomes and comprises colour difference signal and convert the matrixer that primary signal is used to.
Also have, the operation of micro computer (26) competent system, the picture brightness that it is adjusted according to user, the settings of conversion pixel parameter control part (28), and then the size to luminance signal and parameter convert, the another kind of output signal of sending due to micro computer (26), light enabling signal is as the control signal of turning on lamp, be input to after light drive division (25), therefrom control light drive division (25) and produce light drive current, at this moment drive electric current or alternating current or the direct current of light (21).
Luminance signal (Y) and the colour difference signal (R-Y of above-mentioned picture signal handling part (27) output, B-Y) as shown in Figure 4, gain control and the parameter of luminance signal have been represented, when user adjusts brightness, conventionally adopt the mode of simultaneously two kinds of parameters being controlled, that is, and when user wants brightness to turn down, gain is controlled and is reduced to 50%, and parameter drops to 0V can obtain dark picture.
This, user adjust brightness gain control-parameter setting range as shown in Figure 5, be to be formed by shaft-like, its gain control minimum zone is 50%, maximum magnitude is 100%, the minimum voltage of parameter is 0V, maximum voltage is 0.1V.
The image display of conventional art, user only adjusts the brightness of light source output when adjusting brightness, so there is the problem that increases power consumption.
Summary of the invention
The present invention proposes in order to address the above problem.Its object is, adopts in the image display of light, and the size to picture signal and the light source of output are rationally controlled, thereby reaches the object that meets user and adjust brightness.Making full use of various output functions that light has reaches and reduces its power consumption.
The object of the invention is to be achieved through the following technical solutions:
The apparatus for regulating picture brightness of image display, this image display has the light source of brightness adjusting, it is characterized in that consisting of following components: the key input part that is used for inputting the required order of user; When user inputs picture brightness adjustment order by above-mentioned key input part, the size of picture signal to output and the light source of output carry out the control part of rationally controlling; According to the control signal of control part, control the light drive division that light drives.
When above-mentioned control part is inputted picture brightness reduction order by key input part, first reduce the output of light, then reduce the size of picture signal.
Above-mentioned control part is: when receiving the picture brightness reduction order of key input part input, after the picture brightness of wishing with user contrasts, whether the output that judges light reduces to below set field, if while wishing to be reduced to below set field, and only adjust picture brightness by picture signal.
When user's input power is opened order, show the picture signal receiving; When user selects picture regulating command, judge that user has selected reduction brightness still to increase brightness; When input brightness reduces order, the output to above-mentioned light and the size of picture signal are rationally controlled; When input brightness increases order, strengthen the size of picture signal.
The output of above-mentioned light and the size of picture signal carry out rationally controlling: when user selects brightness to reduce order, when reducing above-mentioned light output, judge whether to wish to drop to below set scope; If while wishing to drop to below set scope, stop the minimizing output of light, and only by picture signal, adjust brightness; Above-mentioned adjustment finish time, according to adjust picture brightness display image signals.
Stop the minimizing output of light, only by picture signal, adjust brightness, be input in the picture signal of image display, adjust the gain control parameter of luminance signal.
Effect of the present invention is:
1., while reducing the brightness of image display, because first reduce the output of light, can reduce power consumption.
2. on darker picture, black Picture Showing is obtained more outstanding, therefore improved the contrast of image.
3. because can reduce the electric power of light, so can extend the life-span of light.
Accompanying drawing explanation
Fig. 1 is the DLP TV structure block diagram of conventional art;
Fig. 2 is in Fig. 1, the demonstration figure of the formation of colour circle and operation;
Fig. 3 is the apparatus for regulating picture brightness demonstration figure of the image display of conventional art;
Fig. 4 is the brightness of ordinary image signal and the demonstration figure of colour difference signal;
Fig. 5 is in the image display of conventional art, and when user adjusts brightness, the setting range example of setting pixel parameter shows figure;
Fig. 6 is in image display of the present invention, the block diagram of apparatus for regulating picture brightness;
Fig. 7 is in the present invention, the curve map of the electric power phasic Chang of display light source;
Fig. 8 is in image display of the present invention, when user adjusts brightness, sets the setting range example curve map of pixel parameter;
Fig. 9 is in image display of the present invention, the curve map of the final picture brightness of demonstration obtaining when user adjusts brightness;
Figure 10 is in image display of the present invention, when user adjusts brightness, represents the demonstration figure of OSD device;
Figure 11 is in image display of the present invention, the process flow diagram of display frame luminance regulating method.
21 light, 22 light engines, 23 digital micro-mirrors (DMD), 24 projection lens, 27 signal of video signal handling parts, 28 pixel parameter control parts, 29 scale-of-two order generating units, 100 microcomputerized control portions, 200 light source drive parts.
Embodiment
With reference to accompanying drawing, it is as follows that the present invention is described in more detail:
Shown in Fig. 6 based in image display of the present invention, the inscape of apparatus for regulating picture brightness is expressed identical symbol with the identical inscape in the image display based on conventional art shown in Fig. 3.
Apparatus for regulating picture brightness based on image display of the present invention as shown in Figure 6, the light that light source sends is input to light engine (22) and converts R to, G, after B color, reflection by DMD (23) surface is input to projection lens (24), and arrive screen after expanding by projection lens (24), at this moment, the light that incides DMD (23) is adjusted into the form that covers whole of DMD (23), in addition, the inscape of DMD (23), the ON/OFF control signal that is mirror is, scale-of-two order generating unit (29) output convert R to, G, the binary condition of B color.
The switched primitive color light of this picture signal and light engine (22) output reaches synchronization, what above-mentioned scale-of-two order generating unit (29) received is, luminance signal (Y) and the colour difference signal (R-Y of picture signal handling part (27) output, B-Y), above-mentioned luminance signal (Y) is not directly to input to scale-of-two order generating unit (29), but according to the control signal of micro computer (26) after pixel parameter control part (28), input to scale-of-two order generating unit (29), at this moment, scale-of-two order generating unit (29) just becomes and comprises colour difference signal and convert the matrixer that primary signal is used to.
Also have, the operation of micro computer (26) competent system, the picture brightness that it is adjusted according to user, the settings of conversion pixel parameter control part (28), and then the size to luminance signal and parameter convert, the another kind of output signal of sending due to micro computer (26), light enabling signal is as the control signal of turning on lamp, be input to after light drive division (25), therefrom control light drive division (25) and produce light drive current, at this moment drive electric current or alternating current or the direct current of light (21).
So far seem substantially similar to conventional art, but the difference of the present invention and conventional art; Above-mentioned micro computer (100) is input to the control signal of above-mentioned light drive division (200) except above-mentioned light enabling signal, also has dimmed control signal.
The effect of this control signal is, when user inputs the picture brightness reduction order in brightness adjustment order by key input part, above-mentioned micro computer (100) sends the control signal that reduces light (21) output to light drive division (200), and light drive division (200) reduces the output of light (21) according to the control signal of micro computer (100).
With reference to Fig. 7, light (21) output is described, the example that stage reduces is as follows, with the output of the light (21) of the phasic Chang brightness that user can regulate of having passed the imperial examinations at the provincial level, not cover 50% of whole brightness variable quantity, and the brightness of light can only be reduced to 20% example.
The electric power variation amount of the light providing in the market can be provided this numerical value, and in above-mentioned light (21), the reason that can not reduce again brightness is, if electric power is too low, blasts or do not put fire after burner is cooled.
Further, according to the luminance signal gain controlled quentity controlled variable of user's brightness adjustment order, as shown in Figure 8, here, the deviation that another parameter during to brightness adjustment produces was carried above, and description thereof is omitted for Gu.; when the output of above-mentioned light (21) was reduced to for the 8th stage; the field that the lamplight brightness regulating can cover is to be equivalent to 20% in whole field 50%; when this 20% interval; if assign brightness variance command, output that signal just can make up light (21) brightness causing that declines is adjusted in the gain control of output sawtooth wave state.
But, when exceeding, the order of assigning reduces by 20% time, the electric power that reduces again above-mentioned light is impossible, at this moment can only carry out brightness adjustment according to luminance gain control-departure mode of adjusting in classic method in picture signal, and this field is 30% in overall variation amount 50%.
Thereupon, by adjusting the output of light (21) and the brightness adjustment of output image signal, and the brightness obtaining changes that final what show is the curve map shown in Fig. 9, and the curve map that this final brightness changes consists of linear.Luminance signal (Y) and the colour difference signal (R-Y of above-mentioned picture signal handling part (27) output, B-Y) represent gain control and the deviation of luminance signal, conventionally adopt the mode that two kinds of parameters are all controlled to reach user to adjust the object of brightness.
To in the present invention as constructed as above, the picture brightness method of adjustment of image display is described as follows with reference to Figure 11, first, judges whether user has inputted the stage (S101) of power supply opening order.
Judged result (S101), when user's input power is opened order, shows the picture signal (S102) receiving.
When user inputs picture brightness adjustment order, whether judgement (S103～S104) has selected brightness to reduce order.
Judged result (S104), when having inputted brightness minimizing order, when reducing light output, whether the output of judgement (S105～S106) light is carried out in set scope.
Judged result (S106), if the output of light not in set scope time, stops the minimizing of light output, and only carries out brightness adjustment (S107) by picture signal.
Then, adjust while finishing, according to the picture brightness display image signals of adjusting, (during the shutdown command of S108～S109 user input power, stop (S110).
In addition, judged result (S106), if the output of light is in set scope time, (S111) adjusted in the brightness of wishing according to user.
Above-mentioned judged result (S104), does not input brightness and reduces while ordering, and increase the brightness of picture, and (S112-S113) is adjusted in the brightness of wishing according to user.
In a word, the output regulatory function having by making full use of light, when reducing the brightness of image display, first reduces the output of light, and the output that reduces light is while exceeding set scope, reaches the brightness of hope to adjust the mode of brightness of picture signal.
Claims (2)
1. a picture brightness method of adjustment for image display, is characterized in that: when user's input power is opened order, show the picture signal receiving; When user selects picture regulating command, judge that user has selected reduction brightness still to increase brightness; When input brightness reduces order, the output to above-mentioned light and the size of picture signal are rationally controlled; When input brightness increases order, strengthen the size of picture signal.
2. the picture brightness method of adjustment of a kind of image display as claimed in claim 1, it is characterized in that: the output to above-mentioned light and the size of picture signal are carried out rationally control and be: when user selects brightness to reduce order, when reducing above-mentioned light output, judge whether to wish to drop to below set scope; If while wishing to drop to below set scope, stop the minimizing output of light, and only by picture signal, adjust brightness, be input in the picture signal of image display, adjust the gain control parameter of luminance signal; After above-mentioned adjustment finishes, according to the picture brightness display image signals of adjusting.
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Cited By (1)
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| CN105982508A (en) * | 2015-02-05 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Electric heating apparatus and display control method thereof |
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Application publication date: 20140416 |