TWI313572B - Method of automatically controlling display brightness - Google Patents

Description

1313572

V. DESCRIPTION OF THE INVENTION (1) [Technical field of the invention] This is a display brightness control side, especially the display brightness control of the brightness of the display automatically adjusts the brightness of the display. [Previous technology] In the home office Or in various public places, the display has become the best interface for communicating with various machines or the best terminal device for all kinds of information. Currently available in the market for a wide variety of displays, such as cathode ray tube display, liquid crystal display, plasma display, electroluminescent display (electr〇_luminescent) = SPlay) and field emission display (field emission dispUy) have been used in a variety of gas or information products, such as desktop computers, notebook computers, audio and video products, communication equipment and personal digital assistants, and Gradually become an indispensable part of life. In recent years, the display device has become a computer and other information devices have become the use of the LCD shown in the picture, the display panel 1 2 source) A, the imaging backlight 'with the current market products, for the record computer display Light is reflected to the other source (the back crystal display shows the hottest light source of the basic eye source including the eye penetration liquid lighter process breakthrough and development, one of the liquid crystal display products. Especially notebook type, thin With the requirements of power saving, LCD display is equipped. Please refer to the first figure, which is the two main light sources that can be seen. For example, the first one is irradiated by the ambient light source (the background light crystal display panel 1 2) To the eye source) B. Usually, these two sources

1313572 V. INSTRUCTIONS (2) A 'B's party statement, when the environment is dark, the user will feel the change of the panel 12, so the degree is changed and the target is currently set. A difference in degree 1 will result in a large difference in visual perception. For example, if the source B is smaller than the shell and the backlight b of the liquid crystal display panel 较 2 is darker, the blur is unclear; and when the ambient light source 8 is brighter than the backlight β of the panel 1 2 The user is clear. However, 'the illumination of the ambient light source a to the liquid crystal display environment often causes the liquid crystal display panel 丨2 to appropriately adjust the brightness of the liquid crystal display panel 因2 according to various external environmental conditions or factors, and achieve a comfortable and clear visual experience. One of the most popular research and development topics.

There are a number of techniques for exposing the brightness adjustment method and the description of the display as follows: (1) To extend the battery life of the portable computer, % i t 〇 et al.

U.S. Patent No. 5, 3 1 5, 695, published on June 24, 1991, and the title "PERSONAL COMPUTER CAPABLE OF"

ALTERING DISPLAY LUMINANCE THROUGH KEY OPERATION" discloses a portable computer that uses a keyboard to control and adjust the brightness of the display and its control method. The main principle is that the user can input a brightness adjustment command by the keyboard, and then display the brightness setting value corresponding to the instruction on the display by the brightness control circuit in the personal computer, so that the brightness of the display can be adjusted to The required value. (2) A display device comprising: one of the following: U.S. Patent No. 5,406,305, issued to U.S. Pat. Ambient light sensor, adjacent to the monitor screen; and a brightness setting sheet

Page 13 1313572

V. Description of the invention (3) The element is used to input the desired input to the screen brightness. The degree determining unit adjusts the appropriate value according to the shell control unit output by the firefly setting unit. The brightness value. The ambient light unit determines the range of the adjustable value of the sensor's wheel-out value based on the signal of the brightness calculation unit of the screen brightness determining unit. Bright output signal and brightness display brightness value. The screen output signal will be brighter on the screen. May et al. applied on May 15, 995, and in 1996, 9

U.S. Patent No. 5,554,91, 2, title "ADAPTIVE INSTRUMENT DISPLAY BRIGHTNESS CONTROL SYSTEM" discloses an instrument display brightness control system that automatically adapts to the operator's instructions and special ambient illumination Controlling the brightness of the instrument display of a vehicle, the architecture is mainly to send an ambient light signal to the microprocessor through an ambient light sensor, and then the microprocessor selects a light from the brightness table according to the ambient light. The brightness value makes the instrument display the brightness. If the operator of the vehicle adjusts the display brightness of the instrument and the change in brightness is within the learning range of the system, the microprocessor will set a suitable timer to make the change valid. After the timer expires, the Y^ microprocessor will adjust the brightness view to a predetermined ratio of the difference between the original brightness view and the new brightness view. (4) U.S. Patent No. 5,747,938, issued to Beard et al. on May 22, 1985, entitled "AUTOMATIC CONTROL ELECTROLUMINESCENT BACKLIGHT PANEL" The electroluminescent backlighting panel of the display system is automatically controlled by changes in ambient illumination. The main principle is received by a light sensor

Page 14 1313572 V. Description of the invention (4) An ambient illuminance value and output a corresponding electrical signal to a microcontroller. The microcontroller controls the driving of the galvanic backlight power supply according to changes in ambient illumination until the optimum display brightness is achieved. The automatic electric shock backlight control system is combined with a power supply unit to further improve? Reduce the loss of battery energy. (5) Helms et al., filed on July 17, 1995, and U.S. Patent No. 5,760,760, issued on Jun. 2, 1998, titled "INTELLIGENT LCD BRIGHTNESS CONTROL SYSTEM" The condition automatically adjusts the brightness of the LCD display. The main principle is to generate a brightness control circuit signal representative of the environment by a light sensor. These signals are associated with a predetermined automatic illumination and are used to automatically control the brightness of the liquid crystal display. Once the ring = furnace number is automatically used to set the brightness of the LCD, :: brightness value set, whether high or low, will replace =: (6) Suzuki et al. applied on February 13, 998 'And US Patent No. 6, Announcement No. 6, 〇78, 3〇2 (10) C〇m〇L, ' reveals a liquid crystal display: a plate that can be immediately adjusted according to the ambient illumination in a love scene To - optimum brightness value. When the brightness of the screen is second, a timer is used to detect a time interval until the trigger signal is received. The power controller supplies the power timing signal. When (...-persons arrive at the timer. W A March, and on page 15 of 1313572, V. 5, invention description (5) US Patent No. 6, 483, 245, published on November 19, title " A device and method for controlling the brightness of a field emission display is disclosed in AUTOMATIC BRIGHTNESS CONTROL USING A VARIABLE TIME CONSTANT FILTER. Especially when the ambient illumination is bright or dark, the brightness of the display is also increased or decreased. A timing feature is also implemented to control the system. Sensitivity. In particular, the time between brightness adjustments of the liquid crystal display is partially related to the difference between the desired brightness and the true brightness. However, the ambient illumination of the display panel often has unstable or sudden changes. For example, indoor lamps often flicker due to unstable power supply. Or when a notebook computer is used, people suddenly move around the display panel. These conditions usually cause the 彡衣丨's day dog to illuminate the display panel. ·Changes and returns to the original ambient illumination after a short period of time. For these situations, traditional technology cannot judge this. Sudden or unstable changes in ambient illumination will constantly change the brightness of the screen, which will inevitably cause visual discomfort and instability of the display. In addition, the brightness of the traditional display device will obviously jump when adjusted, and it will not be progressive. The method adjusts the brightness' so that when the brightness changes, the change of brightness can be clearly seen, causing visual sensory discomfort. Therefore, how to overcome the lack of the above technology, and provide a kind of brightness that can be adjusted according to the change of ambient illumination. The method of controlling the brightness of the display is an urgent problem to be solved at present. The main purpose of the present invention is to provide

Page 16 Display brightness control method,

1313572 V. Description of invention (6) 俾: Solving the brightness control of traditional display Adjusting the brightness of the display

The environmental settlement 堑ρ α α tends to “4” 焭 焭 控制 控制 控制 控制 4 4 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制亍 degree: but with immediate and dramatic changes. x 颂 颂 之 之 显 不会 , , : : : : : : : : : : : : : : : : 目的 目的 目的 目的 目的 目的 目的 目的 目的 目的 目的 目的 目的 目的 目的 目的 目的 目的 目的 目的Shouting value, the second signal value represents the brightness of the display, and the value is converted to a third signal value, ^: the brightness of the device is determined by the brightness of the device.

The first 1 #day π / value, (d) determine whether the third signal value I - 汛諕 value is the same; and (e) ~ value and value are the same, maintain the first _ lack of # » - σ 唬 value and The second signal, and the third: two; value:: r holding the display of the current bright mouth is called 0 士 u value /, the brother of a news value is different and lasts for a moment ... i two signal value makes it and the first The three signal values have the same heart rate change to automatically adjust the display brightness to the desired brightness. In order to achieve the above purposes, the present invention further provides a display emergency method for automatically changing the ambient illumination according to the display;:: controlling the display brightness of the party. * The method of the case includes re-automatic 5 weeks - the display illumination range is set to a plurality of intervals::: (a): § f display environment should be - display brightness setting value door (b) its take: one "solid environment The illuminance interval pair signal value represents the ambient illuminance of the display; (C): the 唬 value, the second signal value represents the 1st second message, the non-β redundancy, U) judges the first

1313572 5 invention description (7) The value and the second signal value are in the ambient illumination interval, and the third signal value in the third: third message represents the: wide; the tiger value corresponds to the ... Display brightness setting Μ : = = the ambient illuminance interval of the second signal value and the second photo = = the environment of the first signal value to maintain the display target [brightness, when the I" and the second signal value Ambient illuminance interval phase interval; (4) When the second judges the illuminance interval, the value is used to maintain the display time = the second signal, the second signal value is different and lasts for a first time;:: second: Values and understanding of the case The error is illustrated by the following figures and examples. Chad-clearing [Embodiment] There is a keyboard 11 a The first figure shows the portable diagram of the application of the technology of the present invention. ! :L, as shown in the figure, the portable computer 1〇 structure includes two bodies 1 and a liquid crystal display panel 12 is disposed on the portable computer page 18 1313572. 5. Description of the invention (8) one--曰3 part And at least one photo sensor 14 is disposed on the cover 13 on the crystal display panel 12. The photo sensor 14 can measure the ambient illuminance of the illuminator panel 12 and convert it to represent the ring signal value νι. In addition, the user selects the brightness setting value in the method (for example, the hot key or other adjustment device on the keyboard 1 ia) = private network computer 1 〇, and is stored in the memory so that the user can The brightness of the LCD panel 丨2 is adjusted by a thousand motions. The third figure is a system block diagram of the portable computer shown in the second figure. For example, the portable computer 10 includes: a central processing unit, random = a memory (RAM) 202, brightness control circuit 2 〇 4, and other input / output ^ = 206, such as keyboard Ua (first A picture), can be connected by the bus bar 2〇8%. In this embodiment, the brightness control circuit 2〇4 has a memory to process the computing power. The output of the brightness control circuit 204 is electrically connected to a backlight driver circuitry (not shown) to control the brightness of the liquid crystal display panel 或2 or generate a shell control signal (BC) via the connection line 21 at any time. Transfer to the LCD panel 1 2 to adjust or control the display brightness. In addition, the first signal v 1 generated by the photo sensor 14 (representing the ambient illumination on the display panel 12) is transmitted to the analog-to-digital converter 214 (A/D converter) via the line 2丨2. For signal conversion. Then, the control circuit 216 and the s/W application are executed to transfer the converted signal to the temperature control circuit 2〇4 for processing. Of course, the photo sensor 4 can be an infrared sensor, an ultraviolet sensor, a charge-coupled element sensor, or a photoresistor sensor. 1313572 V. Inventive Note (9) ^ In this case system, according to the ambient illumination range of the display, it can be set into a plurality of ambient illumination intervals, and each display illumination interval corresponds to a display brightness setting value V3. Wherein, the interval of each ambient illuminance interval can be set and adjusted by the user in the interval of the ambient illuminance interval, and the display = V3 can also be set by the user. Such a relationship frame constitutes an ambient illuminance versus display brightness setting value comparison table and is stored in the memory of the brightness control circuit 2 〇 4 . Therefore, when the photo sensor 丨4 detects the ambient illuminance of the liquid crystal display panel 12 and correspondingly generates the first signal=vi, the A/D converter 214, the control circuit 216, and the Sw application are executed. The signal is transmitted to the brightness control circuit for processing. Then, the brightness control circuit 204 uses the ambient illuminance to adjust the brightness setting value of the liquid crystal display, and then the brightness control signal generated by the brightness control circuit 2〇4 is sent to the moonlight driving circuit to adjust the liquid crystal display panel 丨2 To the desired brightness. ,,,, the above system, the case can be manually adjusted and / or the light sensor sense ΰ τ π ί t Ϊ = benefits party degree, etc., so the LCD panel °, a sigh value and environmental illuminance changes correspondingly change The display is from #ί to the desired brightness setting. Manual adjustment and light sensor The positive = positive mode can be synchronized when the light sensor is activated. In the adjustment and automatic adjustment of the half, 隹 " broken ^ ^ ' + type synchronization into the line, the manual adjustment method can take precedence over ^ ^ In addition, the light sensor can also be turned off, so that the system only σ ^ Advance. In addition, of course, the manual adjustment can be turned off to achieve the purpose of saving the lightning sensor automatically sensing and naming the electricity and making the visual feeling comfortable. On the other hand, also

Page 20 1313572 V. INSTRUCTIONS (1〇) One can only activate the Auto-Dim mode to save maximum power. The display brightness adjustment process of the present technology will be separately described below. «Monthly refer to the fourth figure', which shows the flow chart of the system in which the brightness of the display is activated (automatic energy saving mode is turned off), and the manual is used to adjust the brightness of the display. The descriptions of the seventh, eighth and ninth figures. As shown in the fourth figure, after the liquid crystal display panel 12 is activated, the photo sensor 14 is first enabled and the S/W application is executed and the automatic power saving mode is turned off (Auto-Dim) (step S11). Next, a first signal value n is obtained, wherein the first signal value VI represents an ambient illuminance that is illuminated to the display panel 丨2 (step S1 2 ). Then, according to the ambient illuminance, the display brightness setting value comparison table is used to determine the ambient illuminance interval of the first signal value VI, and the first signal value VI is converted into the third by the ambient illuminance to the display brightness setting value comparison table. The signal value V3, wherein the third signal value V3 represents a display panel brightness setting value corresponding to the environmental makeup interval (step s丨3). f When the user manually adjusts or inputs the brightness setting value v4, the redundancy control circuit 204 obtains the brightness setting value V4C currently set by the user, step si 4). Then, it is judged whether or not the brightness setting value currently set by the user is equal to the third signal value V3 (step S15). When the current brightness setting value V4 of the user is equal to the brightness setting value V3 corresponding to the ambient illuminance interval, it is not necessary to adjust the brightness setting value V3 and continue to perform step S1 3 ° when the user currently sets When the brightness setting value V4 is not equal to the brightness setting value V3 corresponding to the ambient illuminance interval, the brightness setting value V3 corresponding to the ambient illuminance interval is set to the brightness setting currently set by the user.

Page 21 1313572 V. INSTRUCTIONS (11) One-to-one value V 4 is equal (step s 1 6 ). Subsequently, step s丨3 is repeated.第五 Refer to the fifth figure, which shows the flow chart of the system to adjust the brightness of the display in an automatic manner when the photo sensor is activated (automatic, energy-saving mode is off). For the description of the fifth figure below, please also refer to the description of the seventh figure and figure below. As shown in the fifth figure, after the liquid crystal display panel 12 is activated, it first causes the light sensor 14 to execute its application and causes the automatic energy saving mode to turn off Uuto-DinO (step S21). Then, the first signal value π and the second=number ^ ' are obtained, wherein the first signal value n represents the illumination to the display panel, and the second signal value V2 represents the display panel 12 ^ gram = (step S22 ). Subsequently, it is determined that the first signal value n is located in the ring 5! The true sound batch 6f ^ the first signal value VI is converted by the ambient illumination to the display u and the alpha and the dice table is converted into the third signal value V3, wherein the first :r 1 half represents the display panel setting corresponding to the ambient illuminance area _ (step S23). ~ and sigh (the cow is connected to the 12'4, the judgment, the first, the value of the signal V3 and the second signal value) whether the phase is the same as the second signal value 1^3 and the second signal value V2 V: At 4 5, the brightness setting value of the display is set to be the same as the brightness displayed by the fish, and the circuit 2 〇 4 will be transmitted by the brightness control signal. To the current brightness of the display panel 12, and repeat step /2. When the third signal value V3 of the shai is different from the second signal value v2, the steps S22 to S24 are repeated after a period of time Tdi to Whether the judgment is different from the second reading and continues with a first special (step value)

Page 22 1313572 V. Description of invention (12) Step S25). If the third signal value V3 and the second signal value V2 are still different after the step S25, it is determined that the brightness setting value V3 is different from the second signal value V2 and continues for the first specific time; When the third signal value V3 is the same as the second signal value V2 after the step S25, it is determined that the third signal value V3 is different from the second signal value V2 and does not continue for the first specific time. Referring to the fifth figure, when it is determined that the third brightness value V 3 is different from the second signal value V2 and continues for the first specific time, the second signal value V2 is adjusted to be the third set value V3. Similarly, the brightness of the display panel 12 is adjusted according to the brightness setting value v 3 corresponding to the ambient illumination interval, thereby automatically adjusting the brightness of the display panel 丨 2 to the desired brightness (step S26). The brightness control circuit 2〇4 will adjust the second signal value V2 in stages to be equal to the party setting value V3 to gradually adjust the brightness without a sudden change in visual perception. In addition, when it is determined that the brightness setting value is different from the second mode value V2 and does not continue for the first specific time, the second signal value V2′ is maintained to maintain the brightness of the display. Subsequently, the step S22°° is repeated. / Read the ', the picture 'the system shows that the system is activated under the light sensor & 杈 省 关闭 ) 以 以 以 以 以 以 以 以 以 以 以 以 以 以 以 以 以 以 〜 〜 〜 〜 〜 〜 〜 〜 〜 〜 〜 〜 〜 〜 〜 〜 'Please also refer to the descriptions of the seventh and tenth diagrams below. ^ ί ϊ i, after the LCD panel 12 is activated, first of all, the monthly h* light sensory 1 4 and the execution; ^ dry recovery mj, + n. ^ i 应用 its application private and auto-disable mode is turned off (Auto-Dim) (step S31). The stub ^) picks up the first signal value VI and the second voicing value V 2 , where The first - signal value VI represents the illumination to the display panel

Page 23 Ϊ 313572 V. Inventive Note (13) Ambient illumination, and the second signal value V2 represents the redundancy of the display panel 12. Then, determining, according to the ambient illuminance, the brightness setting value comparison table of the liquid crystal display, the first signal value V1 and the second signal value “=” in the % illuminance interval, and the first signal value V1 is further used by the environment. The illuminance is converted into a third signal value V3 by the liquid crystal display brightness setting value comparison table, wherein the third signal value V3 represents a display/device brightness setting value corresponding to the ambient illuminance interval (step S32). Next, determining the first Whether the ambient illuminance interval of the signal value V1 is the same as the ambient illuminance interval corresponding to the second signal value V2 (step S33). When the ambient illuminance interval of the first signal value V1 of the shai corresponds to the second signal value v 2 When the illuminance interval is the same, after the re-examination, the second signal value V 2 is maintained to maintain the brightness of the display unchanged, and the environment corresponding to the second illuminance interval and the second signal value V2 of the first signal value v 丨When the illuminance interval is different, it is determined whether the ambient illuminance interval of the first signal value VI is higher than the ambient illuminance interval corresponding to the second signal value ¥2 (step S34). The ambient illuminance interval of the first signal VI After the re-inspection step (step s 3 5 ) in the ambient illumination interval corresponding to the second signal, if the ambient illumination interval of the first signal V1 is not higher than the ambient illumination interval corresponding to the second signal V2 Going back to step S32, the subsequent operation is continued; if the ambient illumination interval of the first signal vi is higher than the ambient illumination interval corresponding to the second signal v2, the display is performed according to steps S24 to S26 of the embodiment shown in FIG. The brightness adjustment action is to adjust the display brightness to the desired value (step S36), and therefore will not be described again. However, when the ambient illuminance interval of the first signal V1 is lower than the second signal

Page 24 1313572 V. Description of Invention (14) When the ambient illuminance interval corresponding to V 2 is increased, the lower limit of the ambient illuminance interval corresponding to the second signal is added (step S37), and then it is determined whether the first signal VI is located in the second The ambient illuminance interval corresponding to the signal V2 (step S38). If the first signal V1 is located in the ambient illumination interval corresponding to the second signal V2, proceed to step S32; if the first signal VI is not in the ambient illumination interval corresponding to the second signal V2, proceed to step S35' for subsequent adjustment. The steps to display the desired brightness. In order to further illustrate the present case, the above process will be described below by way of specific examples. Please refer to the seventh figure, which is a comparison table showing the ambient illuminance to the display brightness setting. As shown in the seventh figure, in the comparison table of the ambient illuminance to the display brightness setting value, the ambient illuminance V1 can be divided into a plurality of environmental illuminance intervals (intervals I, π, 111, IV ...), and each environment Illumination interval (interval I (o-Ll), II (U-L2), III (L2-L3), IV distance and total interval can be set and adjusted according to the user. In addition, each ambient illumination interval (interval I) , π, III, IV...) corresponds to a display of the guest sounds (four) (8), B2, B3, B4...). According to the brightness adjustment method of the display of the present invention, first, the first signal value V1 and the second signal value V2 are obtained, that is, the ambient illuminance value VI irradiated to the display and the brightness value V2 of the display are obtained. Then, it is judged which ambient illuminance interval (interval I, π, III, IV...) the first signal value V1 is located. Use the comparison table to find out the display brightness corresponding to the ambient illumination interval, and then depreciate V3. Next, it is judged whether or not the second signal value V2 is equal to the light setting value V3. If the second signal value V2 is equal to the brightness setting value n, then the brightness of the indicator is ^^. If the second signal value ¥2 is not equal to the brightness setting value V3, then wait

1313572 V. Invention Description (15) After the time T d 1 , the first signal value V 1 and the second signal value V2 are re-acquired, and after repeating the foregoing steps, it is determined whether the second signal value ¥2 is equal to the brightness setting value. V3. When the second signal value is equal to the brightness setting value V3, the brightness of the display is maintained; and when the second signal value ¥2 is not equal to the brightness setting value V3, the second signal value is gradually adjusted. 2, making it the same as the brightness setting value V3, automatically adjusting the brightness of the display to the desired brightness according to the change of the ambient illumination. In this embodiment, the ambient illumination range irradiated to the display panel is divided into a plurality of intervals, for convenience, the following four For example, the ambient illumination interval corresponds to the brightness setting value of a display and the brightness setting value is adjustable. In this embodiment, the environment according to the display will be adjusted. The illuminance increase or decrease is divided into an increase curve (such as a black curve) and a decrease curve (such as a light curve), and the ambient illuminance range of the display is divided into a first ambient illuminance zone, a second ambient illuminance zone, a third ambient illuminance zone, and a In the four ambient illumination zones, each ambient illumination interval corresponds to a required brightness setting value of a display, wherein the required brightness setting values of the display are B1, B2, B3, B 4, the relationship is B1 SB2 SB3 SB4, and these display brightness setting values can be independently dynamically adjusted and set. When the ambient illuminance of the display is increased from a to b, since b is smaller than L 2 , the brightness of the display remains unchanged. If the ambient illumination of the display is increased from a to c, the brightness of the display is automatically adjusted to B3 because c is greater than L2. When the ambient illumination of the display is reduced from c to b, the brightness of the display is maintained because b is greater than L2' No change, if the ambient illumination of the display is reduced from c to a, since a is less than L2, the brightness of the display is automatically adjusted to B2 〇

Page 26 1313572 V. INSTRUCTIONS (16) Please refer to the eighth figure, which is a graph of the ambient illumination of the display versus the brightness setting of the display. As shown in the eighth figure, the ambient illumination range of the display is set to four ambient illumination intervals, and each ambient illumination interval corresponds to a display brightness setting value, wherein the display brightness setting values are B1, B2, B3, B4. When the display brightness setting value B2 corresponding to the second ambient illuminance section is adjusted to B2', since B2' is larger than B3, the display brightness setting value B3 corresponding to the third ambient illuminance section is also automatically adjusted to B2'. Please refer to the ninth figure, which is a graph of the ambient illumination of the display versus the brightness setting of the display. As shown in the ninth figure, the ambient illumination range of the display is set to four ambient illumination intervals, and each ambient illumination interval corresponds to a display brightness setting value, wherein the display brightness setting values are B1, B2, B3, B4. When the display brightness setting value B3 corresponding to the third ambient illuminance area is adjusted to B3', since B3' is smaller than B2, the display brightness setting value B2 corresponding to the second ambient illuminance area is also automatically adjusted to B3'. Please refer to the tenth figure, which is a graph showing the ambient illuminance of the display and the brightness of the display versus time. As shown in the tenth figure, when the ambient illuminance of the display is at time 11, the illuminance c is reduced to the illuminance a, and at time 12, the ambient illuminance of the display is changed back to the original c, which is similar to the flashing of the lamp or the movement of the person. . Although the ambient illumination a of the display is less than L2', the ambient illumination change of the display does not last for a first specific time, so the brightness of the display remains unchanged at B3, so the brightness of the display does not change due to temporary changes in the illumination of the display environment. Please refer to the younger ten maps, and the unfavorable illuminance at the time ΐ 3 o'clock by c

Page 27 1313572 Five invention description (17) ___ is reduced to a, the ambient illuminance a of the display is less than L2, and the illuminance change continues for the first specific time Tdl, and the brightness of the environmental display of the display gradually changes from B3 to ", so display W At time t4, it immediately changes drastically. In addition, the adjustment of the display does not increase from & to C, and the ambient illumination time of the display is t6. At 17 o'clock in the show, Qian Qian Chou Gu & Temple 疋 ^ ^ ^ T d 1 , LV force: 栌 二显 redundancy from "gradually changed to B3, so turn over in the day will not have immediate dramatic changes . Therefore, the brightness of the monitor is a kind of display brightness adjustment according to the change of the illuminance of the environment automatically used for the display of the brightness control system of the display is not bright... display the display brightness of the display temporarily changed 3 degrees and immediately adjust The brightness is gradually increasing the force σ or the second error is changed immediately by the method of the present method. V, so the display brightness of the display is not known by the person who knows this, but the person who is attached to the surname of the surname is not modified, and is modified by the person who wants to protect the patent range. 1313572 Simple description of the diagram Simple illustration of the diagram The first picture shows the two main light sources that the eye can see when using the LCD. The second figure is a schematic diagram showing the structure of a portable computer using the technology of the present invention. The third picture is a system block diagram of the portable computer shown in the second figure. The fourth picture shows the flow chart of manually adjusting the brightness of the display under the light sensor start (automatic energy saving mode off). Figure 5: It shows the flow chart of the system in this case when the light sensor is activated (automatic energy saving mode is off) to adjust the brightness of the display in an automatic adjustment mode. Figure 6 is a flow chart showing another embodiment of the system in which the brightness of the display is adjusted in an automatic adjustment mode (the automatic energy saving mode is turned off). Figure 7: This is a comparison table showing the ambient illuminance versus the brightness setting of the display. Figure 8: This is a graph of the ambient illuminance of the display versus the brightness setting of the display. Figure 9: This is a graph of the ambient illumination of the display versus the display brightness. Figure 10: This is a plot of the ambient illuminance of the display and the brightness versus time of the display. Illustration symbol description 10: Portable computer 11: Subject

Page 29 1313572 Simple description of the diagram lla: Keyboard 1 3: Cover 2 0 0: Central processing unit 2 0 4: Brightness control circuit 2 0 8 : Bus 2 2 2: Line 2 1 6 : Control circuit A: Environment Light source 1 2 : Liquid crystal display panel 1 4 : Photo sensor 2 0 2 : Random access memory (RAM) 206: Other input/output device 2 1 0 : Connection line 214: Analog-to-digital converter B: Backlight SI 1~S1 6 : The system in this case is to manually adjust the brightness of the display under the light sensor start (automatic energy saving mode is off). Step S2 S2 6 : The system of the case is activated by the light sensor (automatic The energy saving mode is turned off) The process of adjusting the brightness of the display by the automatic adjustment method S3: S38: Another process step of adjusting the brightness of the display by the automatic adjustment mode when the system is activated by the light sensor (automatic energy saving mode is turned off)

Page 30

Claims (1)

1313572 VI. 1. Applying for the patent range of the package and the signal modification method. A display automatic brightness control method is applied to - display the brightness of the display automatically according to the change of ambient illumination, the f & Step: / 〆 (a) obtains a first signal value, the first signal value represents the ambient illuminance of the display; ' τ (b) obtains a second signal value, the second signal value represents the brightness of the display; (c) converting the first signal value into a third signal value, wherein the first signal value represents a brightness setting value required by the display; (d) determining whether the second signal value is the same as the second signal value; _ (e) when the third signal value is the same as the second signal value, the dimension 7 signal value is used to maintain the current brightness of the display, and when the x 2 J: is different from the second signal value and continues A first specific time two; the signal value is the same as the (four) three signal value, and the brightness of the display is automatically adjusted to the desired brightness according to the environment. Brother...The automatic brightness control of the display as described in the section of the display. The second ring of the display includes: / provide - light sensor 'for the = = = the display = brightness control - piece sensing ultraviolet sensor , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , And continuing the first-specific time, adjusting the second signal value to be the same as the third signal value, so as to adjust the current brightness of the display to the desired brightness; and ^ (e4) when determining the third signal value and The value of the second signal is different and there is no holding, and the '1' is maintained as the second news 5 tiger value to maintain the brightness of the spear. ' ' D° 9 · If the patent application scope The automatic brightness control method of the display of the item 8 wherein the step (e3) further comprises the step of: adjusting the second signal value according to the ambient illumination interval stage until the second signal value is the same as the third signal value. . A kind of display automatic brightness control method's application The brightness of the display is automatically adjusted according to the ambient illuminance change in a display. The step includes: 忐 color (a) setting the ambient illuminance range of the display to a plurality of intervals, wherein each ambient illuminance interval corresponds to a display The brightness setting value is 3. ' (b) obtaining a first signal value, the first signal value system, the ambient illumination of the device; the clothing is not bright (]) to obtain a second signal value, the second signal value represents The display (d) determines that the first signal value and the second signal value are in a range of degrees, and converts the first signal value into a third signal. The first value represents the first signal value in the environment. Illumination "station: the display acceptance value of the display; (e) determines whether the ambient illumination interval of the first signal value is the same as the second 33 f 1313572 6. The ambient illuminance interval of the signal value of the application for the patent range is the same; (f) maintaining the second signal value when the ambient illuminance interval of the first signal value is the same as the ambient illuminance interval of the second signal value, To maintain the current brightness of the display, and when the ambient illumination interval of the first signal value is different from the ambient illumination interval of the second signal value, determine whether the ambient illumination interval of the first signal value is higher than the second signal. The ambient illuminance interval corresponding to the value; & (g) determining whether the third signal value is related to the second signal when the ambient illuminance interval of the first signal value is higher than the ambient illuminance interval corresponding to the second signal value And (h) when the third signal value is the same as the second signal value, maintaining the signal value of the brother to maintain the current brightness of the display, and when the second signal value and the second signal value are When the first specific time is different and continues, the second signal value is adjusted to be the same as the third signal value, and the brightness of the display is automatically adjusted to the desired brightness according to the change of the ambient illumination. X 1 1 The display automatic brightness control method as described in claim 1 wherein the step (b) further comprises the step of: providing a light sensor for generating the ambient illumination according to the display The first signal value. 12. The automatic brightness control method of the display according to claim 11, wherein the light sensor is an infrared sensor, an ultraviolet sensor, an electric stealing component sensor or a photoresistor sensing Device. U·, such as ± 申 ^ 专利 专利 专利 专利 专利 专利 专利 专利 专利 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 显示器 Page 34 1313572 6. The patent application scope method, wherein the step (h2) further comprises the following steps: (h3) adjusting when the third signal value is different from the second signal value and continues for the first specific time The second signal value is the same as the third signal value, so as to adjust the current brightness of the display to the desired brightness; and (h4) when it is determined that the third signal value is different from the second signal value and does not persist. The first specific time maintains the second signal value to maintain the brightness of the display. The method of controlling the automatic brightness of the display according to claim 17, wherein the step (h3) further comprises the step of: adjusting the second signal value according to the ambient illumination interval stage until the second signal value is The third signal value is the same as 0 Page 36