TW200832039A - Brightness adjustment method - Google Patents

Abstract

A brightness adjustment method suitable for adjusting the brightness of a display image projected from a projection apparatus is provided. The brightness adjustment method includes following steps. First, when every time interval is passed, a first average image brightness value is obtained according to the present image signal. Afterward, when every A time intervals are passed, a third average image brightness value and a temporary iris step value corresponding thereto are obtained according to the first average image brightness values in former B time intervals, wherein A and B are both integers larger than 1. In addition, when every time interval is passed, it is judged that if the difference between the present and former first average image brightness values falls outside a default range to decide that an iris is switched or not.

Description

200832039 FI 819 22574twf.doc/n IX. Description of the Invention: [Technical Field] The present invention relates to a brightness adjustment method, and more particularly to a brightness adjustment method for a display picture. [Prior Art] A general projection apparatus controls the luminous flux of light emitted from a light source by changing the size of an iris to adjust the brightness of a display image projected by the projection device. The aperture can be resized by a stepping motor or a stepless motor. In a projection device using a stepping motor, the stepping motor adjusts the size of the aperture in a segmented manner, that is, the aperture can only be switched to a fixed number of discrete magnitudes. A conventional automatic aperture brightness adjustment for displaying a face, including the following example steps. First, the screen signal at # is corresponding to the average gray level of the display surface to obtain a mean π degree value. Next, it is judged whether or not the average brightness value of the picture corresponds to the current aperture size. Right is no, and fine is switched to the size corresponding to the average brightness of the face. In the towel, the higher average brightness value of the face corresponds to a larger aperture, while the smaller - average brightness value has a smaller aperture. Such a well-known method of improving the brightness of the surface can achieve the purpose of improving the contrast of the display surface. φ, ... is not the face of the automatic aperture brightness adjustment method of the large / 1, (four) ^ if the size of the change is not continuous with each other, so when the aperture is not progressive 'user's eyes allow the stomach to detect the face of the face / ^ 9, cross-border, causing user confusion. Furthermore, when 200832039 PT819 22574twf.doc/n uses the above projection device to view the dynamic facet, the facet truth value per second often changes continuously. At this time, if you use the method of ς 的 昼 ς ς ς ς 会 会 会 会 会 会 会 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁 繁In addition, in some films, there is a combination of paintings: when looking for a scene that is very dark or very bright, such as the moment of the explosion = the shadow of the moment. At this time, the automatic fine brightness adjustment method using the conventional painful surface will make the light_size between the normal size and the large size or the general size and the green change' cause the display surface to become too bright or too wide. The second knife [invention content], dark and not suitable for human eyes to watch. The present invention provides a brightness adjustment method which is capable of improving the contrast of the projected mosquitoes projected by the projection fruit, and making the brightness change of the display face more natural and not easily perceived by the human eye. The present invention proposes a brightness adjustment method adapted to adjust the brightness of a projected-displayed surface. The projection device has a light source and an aperture, and the projection device is adapted to display the 昼 and the surface according to the image signal output. This brightness adjustment method includes the following steps. First, each time an interval elapses, the book's average brightness value is paid according to the book number in this time interval. After that, after every a time f interval, t obtains the third-surface average brightness value according to the first-picture average brightness values in the previous B time intervals, and obtains a money and money according to the third face. _ segment (four) stored value. The towels are all large, and each time interval is 'compared to the first -|π degree value and the first-to-the-surface average brightness obtained before the time interval is 6 200832039 PT819 22574twf.doc/n degree value to get - Difference. When the difference falls outside the preset range, and when the size of the aperture of the Japanese aperture does not correspond to the temporary storage value of the aperture segment at that time, the aperture is switched to the size corresponding to the temporary storage value of the aperture segment number. In an embodiment of the invention, the preset range is defined by a reference value greater than zero, and when the absolute value of the difference is greater than the reference value, the I upper 洛 difference is outside the preset range. In an embodiment of the present invention, the preset range is defined by a negative reference value by V and a test value, and when the difference is less than the negative reference value or greater than the positive reference value, the difference falls. Outside the preset range. Wherein, the absolute value of the negative reference value may be less than the absolute value of the positive reference value. In one embodiment of the present invention, the brightness adjustment method may further include determining whether the first picture average degree of exemption in the previous time interval is greater than or above the upper boundary value. If so, the aperture is at its maximum size and the light source is in a forced normal mode. Where ρ is a positive integer. In addition, the brightness adjustment method may further include, after a time interval, determining whether the light source is in the forced normal mode, whether the difference is less than a """, and the first average brightness value is less than the upper boundary. value. If yes, switch the light source to a user mode. The user mode is adapted to be set to - normal mode or a power saving mode. The brightness of the light source in the normal mode is the same as that in the forced normal mode, and the brightness of the light source in the normal mode is higher than that in the power saving mode. In an embodiment of the present invention, the brightness adjustment method may further include determining whether the _picture average brightness values in the previous Q time intervals are below the lower-lower bound value. If yes, make the aperture size 200832039 PT819 22574twf.doc/n in the smallest state and leave the light source in the -force power saving mode. Where 〇 is a positive integer. In addition, the brightness 峨 method may further include determining whether the light source is in a forced power saving mode, and whether the difference is greater than a positive reference value and the first-to-face average brightness value is greater than a lower boundary value. If yes, switch to the system mode. The user mode is adapted to be set to a normal mode or a power saving mode. The brightness of the light source in the power saving mode and the brightness smoke in the strong (four) electric mode, and the brightness of the light source in the normal mode is higher than that in the power saving mode. In the embodiment of the invention, the brightness adjustment method may include the steps of the two embodiments described above. In an embodiment of the present invention, at one moment, the kneading signal may correspond to the brightness of the display picture by one of a plurality of gamma curves, and the range of the first kneading average brightness value may be Divided into multiple brightness ranges. These party ranges are divided from a dark to a bright range to a first Ktc range, where K is an integer greater than one. Each brightness range corresponds to one of these gamma curves. In addition, the brightness adjustment method further includes: determining, after each time interval, whether the first written average brightness value at the time falls below the gamma curve of the gamma curve before the time interval, and if not, the other The curve is such that the face city corresponds to the shell of ^=. Furthermore, if the gamma curve before a time interval corresponds to the Lth brightness range, the method of matching the kneading signal with the brightness of the display surface by using another gamma curve is: determining the first 当时 at that time. Whether the average brightness value of the surface is higher than the average brightness value of the first-plane surface obtained before a time interval, and the gamma curve corresponding to the (L+1) brightness range is used to make the surface signal 8 200832039 PT819 22574twf.d 〇c/n does not correspond to the degree of freedom of the picture; if no, 'the gamma curve corresponding to the (L_1) brightness range corresponds to the brightness of the display surface. In the embodiment of the present invention, the third mean surface brightness value is obtained as follows: every E time interval, the e-time average value is averaged in e time intervals to obtain a second 昼The average brightness of the surface ^^1^, after every A time interval, the average brightness value of the ί2Λ2 surface in the first B time intervals is averaged to obtain the third average brightness of the facet 5, medium, Ε is greater than i is less than the integer of Α, and a multiple. In an embodiment of the present invention, the brightness adjustment method may utilize the first E first face average brightness value. The brightest method is in the first element to the E element of an array of each brother. Following the array embodiment, 'brightness adjustment, traits, second, second brother, 昼-average brightness value. Brightness ★ Zhou Yifang, after a time interval, will be the method of parenthood, c. Two arrays of the first - Toyota, once the face average value stored in the interval can include more to H' redundancy The second gold positive integer Γ value obtained by the gestation method after each time interval is stored in the second array of the (correction) element, wherein v1 is appropriate and sufficient is the first At the same time, the average brightness value is collected in the interval to calculate the brightness adjustment method of the third written flat invention = stored value. In addition, the average redundancy value is used to obtain a difference, and when the absolute value of the difference is greater than 9 200832039 PT819 22574twf.doc/n, the aperture is switched to the size corresponding to the number of aperture segments. Therefore, the brightness adjusting method of the present invention can avoid the frequency switching of the projection device, causing the surface to be dimmed and can switch the aperture to the most suitable size at an appropriate timing to improve the contrast of the display surface and display The brightness of the kneading surface changes more naturally. The above described features and advantages of the present invention will become more apparent from the following description. [Embodiment] C, FIG. 1 is a flowchart of a brightness adjustment method according to an embodiment of the present invention, and FIG. 2 is an example of a time axis of the method for adjusting the temperature of FIG. Referring to FIG. 1 and FIG. 2, the brightness adjustment method 1 of the embodiment is applicable to a projection device. The projection device has a light source and an aperture, and is adapted to output a display surface according to a face signal. The brightness adjustment method 10 疋 determines the brightness of the light emitted by the light source through the aperture by controlling the size of the aperture to adjust the brightness of the display pupil projected by the projection device, such as a light bulb, a light emitting diode or the like. Light-emitting element. The brightness adjustment method 1 〇〇 includes (J the following steps. First, turn on the projection device and set the projection segment number of the aperture segment temporary storage value S, which can preset the aperture number temporary storage value s before the projector device leaves the factory or The aperture number temporary storage value s is set by the OSD of the projection device. Thereafter, a first written average luminance value A1 is obtained according to the current pupil signal every time interval T (step 110), in this embodiment, time The interval τ is, for example, 1 second, but is not limited thereto. The kneading signal is, for example, the grayscale value of each pixel, and the first-plane average luminance value Α1 is, for example, the grayscale value of the pixel at that time 200832039 PT819 22574twf After the average value t of .doc/n, step 200 is performed every time interval τ, which obtains the second skew average luminance value according to the first luminance average luminance values ^ in the first f time intervals ^ A3, and _ third face average bright A3 is obtained - the corresponding number of aperture segments temporarily stored S. Its t, A and ^ ratio, an integer greater than 1. In this embodiment, A is for example 16, and f : Ο = 4. In addition, the corresponding value of the ''th surface' average brightness value^ and the number of segments is temporarily stored. The relationship can be best based on the experimental results by familiarity with the person. The method of obtaining the third mean surface brightness value 土 can be performed every E time intervals τ == The picture average brightness value is the average value of the surface A2, where E is greater than 丨 and less than A, and the singularity A is a multiple of E. In this embodiment, E is, for example, two, before step 3 is performed, step 17 is performed. , 撕 撕 在 是否 是否 % % % % % % % % % % % % % % % % % % % % % % % % δ time intervals τ(10)Ξ;^Γ. Surface average pure value Α2 average 昼H昼面平料 However, in other embodiments of the present invention, the third picture average brightness value can also be obtained. For example, 11 200832039 PT819 22574twf.doc/n time interval T, directly averaging the first three time surface average brightness values Α1 to obtain these first 昼 in the first cell. In this embodiment, the local average brightness value A3 can be performed. 190, which is used to determine whether the current time is a step - before the step 200 If no, go back to step 110; if ^ is already eight time intervals 〇〇. 2〇〇 can include recalculation by ^= proceed to step 200. Step aperture number temporary value S. Keep 4 interval τ Number of times and updatesΟ

Further, in step 110 and step 17, step 140 is performed. Step 14〇9, the twist adjustment method 100 compares the current (four)-昼definite luminance value=time intervalΤ, and the obtained first picture average brightness value A1 is said to be in the 81st second before the 守/to-day inter-day interval τ When comparing the 81st second with the difference D. For example, the average brightness value A1 of the face is obtained by comparing the first (fourth) and the 81st seconds respectively to obtain the 'D', and the 82th second, the value A and so on at the Nth time. The average luminance of the first-plane surface obtained by the average luminance of the surface is two integers (N-1) seconds and greater than the integer of B. When the difference D falls in the default range of =2, the size of the aperture and the temporary value of the aperture segment at the time of the § 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备 备The calculated third written average brightness value of A3 is 80 seconds. 80 on the top of the aperture section of the A*3 corresponding to the A*3, the actual size of the aperture of the younger brother of 82 seconds does not correspond to the temporary storage value s8G of the deer value of the 8th leap second, step 142 is performed. Otherwise, two aperture segments 142. In this embodiment, the job range can be - greater than = step

As defined, when the absolute value of the difference D is greater than the reference value R, the value R T is the value D falls 12 200832039 PT819 22574twf.doc / n is outside the preset range. Furthermore, the step M2 is to switch the aperture to the size corresponding to the number of aperture segments of the temporary storage value S. In the above, the brightness adjustment method 1 of the present embodiment collects a sufficient and appropriate amount of the first kneading average brightness value A from the B time intervals T (four) three-dimensional average brightness value A3 The corresponding aperture number is the temporary value S. Therefore, the brightness adjustment method (10) can greatly reduce the chance of misjudgment, and switch the aperture to the most appropriate size, for example, when the display face is intended to display a generally bright scene, and the aperture is enlarged when the desired dark scene is displayed. Zoom out to increase the contrast of the displayed face. In addition, the brightness adjustment method 1 of the embodiment compares the first mean surface brightness value A1 before the time interval τ to obtain a difference d, and when the absolute value of the difference D is large enough (for example, greater than When the reference value is phantom, the aperture is switched to the size corresponding to the number of aperture segments S. Therefore, the brightness adjustment method 100 can cause the user to not display the non-progressive brightness and darkness generated by the aperture at the moment of the aperture. And the ability to switch frequently and frequently cause the display to flicker and dim. In other words, the brightness adjustment method can therefore make the aperture switch to the most suitable size at the appropriate timing, so that the brightness of the display surface is more varied (4). It is said that when the display pupil surface becomes very bright or very dark in a short time, in the present embodiment, for a short time less than a time interval T, for example, 0.05 seconds, the brightness adjustment method 1 does not make the aperture switch to Too small or too large, and the gap between the instant and the brightness is too small. In addition, this embodiment can set the E, A and B values according to the characteristics of the projection type. When these values are large, the embodiment is Brightness adjustment method 1 00 switches the size of the aperture in a more conservative manner, which causes the switching frequency of the light 200832039 PT819 22574twf.doc/n circle to be smaller. When these values are smaller, the switching frequency of the aperture is made larger. In this embodiment, Step 120 and step 130 may be selectively performed between step 110 and step 14〇. Step 120 is to determine, during each time interval T, the first written=average brightness in the first p time intervals τ at the time. Whether the value Α1 is above an upper boundary value υ. If yes, step 122 is performed; if no, proceed to step 130. Where ρ is a positive integer. ('Step 122 is to make the aperture size the maximum state, and The light source is in a normal mode, and then proceeds to step 170. Step 13 is to determine whether the first picture average brightness value Α1 in the first Q time interval 当时 is below the lower boundary value L. If yes, Step I)]; Right No, proceed to 140. Where Q is a positive integer. Step 132 is to minimize the size of the aperture and place the light source in a forced power saving mode, and then proceed to step 170. The boundary value U is greater than the lower boundary value 1. For example, the upper boundary value U may be a value close to the gray level 255, and the lower divided It boundary value L may be a value close to the gray level 〇. Furthermore, the light source is in the forced normal mode. The redundancy is greater than the brightness in the forced power saving mode. Thus, when the display face is nearly white and all black, the brightness adjustment method 100 can make the black of the display face be blacker, whiter whiter, and thus more prominently displayed. In other embodiments, the step-by-step adjustment method of step 120 and step 130 may also include one of step 120 and step 130. In this embodiment, Step 150 and step 160 may be performed between step 140 and step Π0. Step 150 is to determine whether the light source is in force 14 200832039 PT819 22574twf.doc / n is less than - negative reference value R -, and the first - side surface is not smaller than the upper boundary value U. If yes, proceed to step 6〇° step 152 to switch the light source to a user weight Mu ’ and then proceed =

Mu is suitable to be set as a normal 掇,, Τ user shank user can use the fall-firecracker mode. For example, the user = Μ (°η出出,, (10)) interface and the 4U slave is in normal mode or power saving mode. The light source has the same brightness in the normal mode of ===, and the light has the same brightness in this power saving mode. The two-way mode and the forced normal mode can be the same. The difference is only used to distinguish the entry conditions of the two. ^Water saving mode and forced power saving mode can also be the same type of module 160 for judging the wire, whether it is in the forced power saving mode, the difference 〇 positive reference value R+, and the first kneading average brightness (four) is Ο step 17 knife 丨 value L. If yes, go to step 162; otherwise, go to ^ Who, 〇. Step 162 is to switch the light source to the user mode Mu, and then 桓 = A17 〇 where the use of the alternative Mu referred to in steps 152 and 162 is the same. = Light_mode will only switch when the difference DA is at the positive reference value R+ or the small check value R-' so it is not easy for the user to perceive the display = non-progressive light and dark due to the switching of the mode of the light source Variety.乂Because the sensitivity of the human eye to the image is changed from bright to dark and from dark to dark, the absolute value of the negative reference value R- can be made smaller than the positive reference value R+ of the 15th 200832039 PT819 22574twf.doc/n pair value, so that The mode of the light source is more green when the brightness of the display surface is turned from dark to dark, and the light is more comfortable when the human eye is viewed. It is worth noting that in other embodiments, steps 140, steps, and steps may also be performed in any other order. In addition, the brightness adjustment method may also include steps 120 and 150, without including step 13 and the step apology or the brightness adjustment method may include steps 13() and (10), and does not include steps 120 and 150. In the present embodiment, the kneading signal can be obtained by a plurality of gamma curves at a time - and the display of the kneading surface, and the average brightness of the first surface, the range of A1 can be divided into multiple A range of brightness. These luminance ranges are classified from dark to redundant, from the first luminance range to the -kth luminance range, where κ is an integer greater than one. Each of the brightness ranges and the stomach of the second of these gamma curves should, for example, the value of the first picture average brightness value A1, from gray level 0 to gray level 255, and the brightness adjustment method is just at a moment The curve can be selected to make the gray scale value of each element included in the face signal correspond to the brightness of the remaining area of the box reading towel. In addition, optionally, between step 110 and step 120, step 10^step=210 is used for each elapsed time interval τ, and it is determined whether the current average face value of the face A1 falls within the time interval. The gamma stone is in the range of exemption. If yes, proceed to step 12G; if the library is C-curve, the brightness of the surface signal and the display surface should be as follows: Steps 22, 222, and 224. The step is to determine whether the current average brightness value ai of the time surface is greater than the time interval 16 200832039 PT819 22574twf.doc/n interval ^ can be detected first step average brightness value A to step 222, if not, proceed to step one ± right is 疋

The former gamma curve is the first sound of the fish L: the right day ^' interval T α ancient sound r bucket is the corresponding temple dry circumference, step 222 is to use the first gamma curve to make the surface signal and display Main (face 2): After the step 222 or step 224 is completed, the corresponding correspondence is redundant and corresponding. In the present embodiment, the more the step 120 is. The gamma curve r can be designed to be more suitable; the corresponding gamma curve 7 corresponding to the range of =; can be designed to be oblique; higher:: this: to make the display no matter what brightness is the main ^ _, 0 便月匕=节广' because of each change;::部;:: However, the difference between the two parties and the two sides of the two dams is changed to one of them. When the brightness of the bright surface (10) is displayed, the user does not perceive it. ^= It is noted that the present invention does not limit the step size 2^^^ The execution order between the other steps is a picture! In an embodiment of the present invention, in the embodiment of the present invention, in the embodiment of the present invention, in the embodiment of the present invention, in the embodiment of the present invention, in the embodiment of the present invention, ; C Ding step 21 〇. The first-array ArrayAl is used to store this belly: all: '1〇0 can be utilized - #昼昼average brightness value A1. Bright 17 200832039 PT819 22574twf.doc/n degree adjustment method 100, in each E time interval T, sequentially store these first mean surface mean values Α1 in the first element of the first array ArrayAl[0], Two elements of Bading Town ^ (1), ... and the ε element ArrayAl [El]. Further, the brightness adjustment method 1 〇〇 can use a second array ArmyA2 to store the second mean surface luminance values a2. The brightness adjustment method 100 stores the current second picture average π degree value Α2 in the first element ArrayA2[〇] of the second array every E time intervals τ. In addition, the brightness adjustment method 100 may further include storing the second average luminance value A2 obtained in the front (V*E; KSI_interval τ) in the second array (V+). 1) Element ArrayA2[v], where v is a positive integer. Specifically, in the present embodiment, when the first time interval τ 蚪, the first picture average brightness value §1 of the § day is stored in the array element ArmyAl[0]; When the time interval τ elapses for the second time, the current first-plane mean luminance value A1 is stored in the array element ArrayA1[1]; ···; when the E-th time interval T, ie the first The average brightness value of the first picture at that time when E passes

ArrayA 1 [E-1 ] ' and average the values of the array elements Arraya 丨 [〇] to 八丁町 a 1 field to obtain a second picture average brightness value of 八 2, and store it in the array element ArmyA2 [0]. After that, the number of times that the elapsed time interval is recalculated, and the first knead average brightness value A1 when the first time, the second time, and the second time elapsed time interval are sequentially stored in the array element ^

ArrayAl[0], ArrayAl[l]··.ArrayA1[E-1]. Then, after the second time interval E τ, the array element 18 200832039 PT819 22574twf.doc/n c l

The value in ArrayA2[0] is stored to ArrayA2[l], and the values of the array elements ArrayA 1 [0] to ArrayA 1 [E-1 ] are averaged to obtain the second mean luminance value A2, and stored in Array element ArrayA2[0]; The value of the array element is stored in the array element ArrayA2 [2] for the third time interval E, and the value of the array element 八11^^八2[〇] is stored. ^ Array element ArrayA2[l], and the newly obtained second mean surface average value A2 exists in the array element ArrayA2[〇]; and so on. In other words, the newly obtained second pupil average luminance value A2 is present in the array element ArrayA2[0] whose index is the index, and the previous second pupil average luminance value A2 is present as an array element whose index is the original value plus _. When the (a)th interval τ is passed, the values of the (4) elements such as ^^(9) to _2 are averaged, and the average brightness value A3 of the three elements is averaged. In the present embodiment, it is possible to correspond to the current aperture value S of the aperture number after the execution of the step and after returning to the current aperture. If yes, mark ο. _, for example, (4) & H, the mark as - switch value, :, 'right is no, mark the aperture switch note as one without switching the aperture two ίί to G. In this way, the method for determining the corresponding number of temporary storage values 8 in step 14G can be a simple value. If it is a switching value, if the value is in the switching value or does not switch to the non-switching value, the size of the aperture is not further switched; if it is blind, the flowchart of the brightness adjustment method of the embodiment is further omitted. ;=上上; FIG. 3: The brightness adjustment method of the present embodiment·the difference between the above and the above 'GG' is: brightness adjustment side 19 200832039 F i l y 22574twf.doc/n

The C method 100' replaces the step (10) of the brightness adjustment method 1〇〇 with step 140', and the difference between step Μ〇 and step 140 is only that the definition of the preset range is different: in step (10), t, preset It is defined by - negative reference ❹, and - positive mai test value R +, defined as '# difference D is less than this negative reference value r, or $ is positive * test value R +, when the difference D falls outside the scope of employment. In order to match the sensitivity of the human eye to the image from bright to dark and from dark to bright, this example can make the light R_%_ value less than the positive doping R+, so that the aperture size is displayed. Written brightness is easier to switch when it is turned on. The bucket is dark, from the dark R-phase f, and the positive wheat value R+ is equal to the positive reference value R+.亮度 ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度 亮度The number of segments is stored temporarily. = The circle reduces the chance of misjudgment, * o The bright scene will show a general zoom out so that the display is doubled; the general dark scene is compared with the C gold adjustment method before the light. The grace value is obtained as the difference, and when the difference is absolutely small. Therefore, the brightness adjustment method corresponding to the temporary storage value of the 0 daylight ring switch to the aperture segment number can be made to be difficult for the user to perceive, and the i day = cause the display face to flicker. In other words, the optimal method of the optimum 2 can be used to switch the aperture at the appropriate timing to make the brightness of the display surface change more natural. 20 200832039 22574twf.doc/n LIMITING THE INVENTION The present invention is disclosed above, but it is not intended to be used. The following is a description of the method for adjusting the brightness of an embodiment of the present invention.

C i Fig. 2 shows an example of the time axis of the brightness adjustment method of Fig. 1. FIG. 3 is a flowchart of a brightness adjustment method according to another embodiment of the present invention. L main component symbol description] 1(8), 1〇〇': brightness adjustment method 110~224, 140' ··Step A1: first kneading average brightness value A2 · second kneading average brightness value A3 · third kneading average Luminance value 〇: difference L: lower cutoff value Mu: user mode R: reference value R-, : negative reference value R+, R+': positive reference value s: aperture segment number temporary value τ: time interval U: upper Demarcation value Γ: Gamma curve 21

Claims (1)

200832039 F1819 ^2574twf.doc/n X. Patent application scope: Dimming brightness adjustment, suitable for light-projection device projection and adultery, the projection device has - light source and - aperture, ancient two: t And outputting the display surface according to the 昼 讯 讯 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , r 调整 丨 r r r r r r r r r 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨L Α time interval 'According to the G value _~ the third 平均 average brightness value in the previous time interval, and according to the value 'where AW is the integer of the cut; Between the comparisons and the comparisons, the average brightness value of the first picture is the same as “w, ώ is set outside 1 and the temporary storage value of the real two light 81 segments of the aperture does not correspond. The aperture is switched to the size corresponding to the temporary storage value of the first number of segments. The brightness adjustment method described in item 1 of the patent application scope is the pair of the reference value of the preset value of zero. The value is greater than the transfer test _, the record falls on the value of the simple wire, the bar 3 · as in the scope of the patent application In the brightness adjustment method, the preset value of the bean is defined by a reference value and a positive reference value, and when the reference value is greater than the positive reference value, the difference falls: 4· The brightness adjustment method of the item, wherein 22 200832039 F18I9 22574twf.doc/n the absolute value of the negative reference value is less than the absolute value of the positive reference value. 5. The brightness adjustment method as described in claim 1 of the patent scope, After the time interval, the method further includes the following steps: determining whether the average brightness values of the first ones in the first P time intervals are above an upper boundary value, and if so, the size of the aperture is in a maximum state, And the light source is in a forced normal mode, wherein P is a positive integer 0. 6. The brightness adjustment method according to claim 5, wherein each time interval is passed, the following steps are further included: determining whether the light source is in the forcing In the normal mode, whether the difference is less than a negative reference value, and whether the first pupil average brightness value is less than the upper boundary value, and if yes, the light source is switched to a user mode, The user mode is adapted to be set to a normal mode or a power saving mode, the brightness of the light source in the normal mode is the same as the brightness in the forced normal mode, and the brightness ratio of the light source in the normal mode is The brightness is high in the power saving mode. 7. The brightness adjustment method according to claim 1, wherein the time interval further includes the following steps: determining the first time slots in the first Q time intervals Whether the average brightness value is below the demarcation value, if yes, the size of the aperture is at a minimum state, and the light source is in a forced power saving mode, wherein Q is a positive integer. 8·If the patent application scope item 7 The brightness adjustment method includes the following steps every time interval: 23 200832039 PT819 22574twf.doc/n determines whether the light source is in the forced power saving mode, whether the difference is greater than a positive reference value, and the number - whether the average brightness value of the facet is greater than the lower cutoff value, and if yes, the light source is switched to a user mode, and the user mode in the bean is adapted to be set to one In the pass mode or a power saving mode, the brightness of the light source in the power saving mode is the same as the brightness in the forced power saving mode, and the brightness of the light source in the normal mode is higher than that in the power saving mode. Degree south. F9· The brightness adjustment method according to item 1 of the patent application scope includes the following steps after each time interval: & determining whether the average brightness values of the first pictures in the previous time interval are all - Above the upper boundary value, if yes, the size of the aperture is at a maximum state, and the light source is in a forced normal mode; and, determining the average luminous output value of the first ones in the first Q time intervals, f, the demarcation value is 丁, if yes, the second dimension of the aperture is minimized, and the light source is in a forced power saving mode, the upper sub== value is greater than the lower demarcation value, and the light source is forced In the normal mode, the ratio of production I is high in the forced power saving mode, where? And (5 is a positive integer 10. The brightness adjustment method according to item 9 of the patent application scope, wherein the time interval elapses, further includes the following steps: the mother determines whether the source is in the forced normal mode, the difference Whether it is a negative reference value, and whether the first pupil average brightness value is less than the upper eight-point value, if yes, the light source is switched to a user mode, and the second knife determines whether the light source is in the mandatory state In the power saving mode, whether the difference is greater than a positive reference value, and whether the first mean surface brightness value is greater than ===24 200832039 PT819 22574twf.doc/n The boundary value 'if the material is 'to switch the (10) to the use Mode, the basin continuous user mode is suitable to be set to ~ normal mode or - power saving mode /, the light ^ the normal mode and the province's Wei style brightness (four) and the normal mode and the financial mode The brightness adjustment method is as follows: η. The brightness adjustment method described in the scope of the patent application, the basin = face: number is one of the plurality of gamma curves and the display screen 6, 7C is opposite the heart 'and the beta - The range of the average brightness value of the face is divided into The range of brightness, the brightness range (four) dark to bright is divided into - the first to the first 〖light range, where Κ is an integer greater than 丨, each of the brightness of the m gamma curve corresponds to one of the brightness The method includes the following steps: each time interval is elapsed, determining whether the first average brightness value of the first face is deducted at the time of nucleation _ the gamma ray has a brightness range=right is not caused by another gamma curve The face signal corresponds to the brightness of the display face. 12. The brightness relay method according to item 4 of the t-profit range, wherein if the interval _ the gorge curve corresponds to the Lth brightness range, the other gamma curve is used to make the face signal The method for displaying the brightness of the face is: determining whether the average brightness value of the first face of the ¥ is greater than the average brightness value of the face before the time interval, and if yes, the _) brightness is used for the duty Lai (4) turns to make the face shouting correspond to the degree of exemption of the display face. If it is no (material) (6), the gamma curve corresponding to the brightness range corresponds to the brightness of the facet signal. 25 200832039 rioiy zz574twf.d〇c/n 13·If the brightness adjustment method described in the 申请-查二τ item is obtained in the patent application scope, the method of taking the average brightness value of the second face is as follows: The first-over-time interval in the interval, the average brightness value of the 乂-弟二昼 surface, the average brightness value per average is obtained by (10) _ the second 昼 surface is equal to 1r The brightness method of a f-meter is the average brightness value of the whole method at every E _ = face, and the brightness is sequentially stored in the first - _ 1 ' ̄ ^ - 昼 face average brightness value 15 as * The younger brother is a member of the element E. The brightness adjustment method described in the second array is the average brightness value per E day, and the brightness scheduling value is cast in the second array: the second time of the second time The average brightness of the surface is adjusted by the brightness adjustment method described in item 15 of the range of 1Ε6·=ΐΙ=, and each of the obtained two points is included (v+l) yuan i (iv) The face average brightness value is stored in the first of the second array, where V is a positive integer. 26