TW201138547A - Color sequential display and light source control method thereof - Google Patents

Abstract

A color sequential display and a light source control method of the color sequential display are provided. The light source control method includes the following steps. A frame data of a frame period is received, which the frame period includes a plurality of color sub-frame periods. Gray distributions of a plurality of colors in the frame data are obtained by analyzing the frame data. Whether all or a portion of a plurality of color light sources of the color sequential display are turned on is determined according to the gray distributions of the colors in the frame data. Wherein, a light emitting time of the color light source turned on is longer than one of the color sub-frame periods. Therefore, the brightness displayed by the color sequential display can be enhanced.

Description

201138547

HD-2Ui〇-〇〇i〇.Xw 34286twfd〇c/I VI. Description of the Invention: [Technical Field] The present invention relates to a display device, and more particularly to a color sequential display and Its light source control method. [Prior Art] The color sequential display is in the time domain compared to the spatial domain. • The two primary colors (red, green, and blue) are mixed. For example, color sequential projectors, color sequential liquid crystal displays, and the like are all color sequential displays. The projection device can project the image onto a large screen to allow more people to view the content displayed on the screen at the same time. Therefore, it is often used in public places such as companies and schools. Furthermore, with the trend toward large-size development of home display products, projections have gradually become popular in the general family, and become an electronic product that is common in modern life. With the advancement of technology, all kinds of electronic products are developing towards high speed, high efficiency, low and light and short. Under this trend, pico projectors (or mini project〇r) have gradually become the mainstream of the future digital digital market. In general, the light source of a pico projector uses a light emitting diode or other solid-state light source to increase the lumen required by the pico projector, thereby increasing the image of the image projected by the pico projector. . After the micro projector is finished, the size of the battery containing the micro projector is about the same as that of a mobile phone on the market. Even micro-projectors can be integrated into mobile phones. Therefore, the pico projector has the advantage of being portable and without field restrictions. 201138547

HJU-2U1U-0010-TW 34286tw£d〇c/I However............... (1)sequential) to display color 'if the projector's light source will be in three dice _ Light sources corresponding to the three primary colors (ie, red, blue, and green) are respectively provided, that is, only the light source of the same color will emit light at the same time, and other color light sources will be turned off. For example, during the red sub-plane, only the red light source will be turned on (uzm on) and emit light. The blue light source and the green light source are closed during the red sub-surface. In the case where the entire surface is a single solid color, the intensity of the light source is weakened by the time division, so that the use of the pico projector may be limited by the intensity of the ambient light. FIG. 1A is a schematic diagram of driving waveforms of a conventional color sequential display. Please refer to Figure 1A. The traditional color-sequence display will provide red, green and blue light sources during the period of the screen, the green sub-surface Pg and the blue sub-surface Pb, respectively. Moreover, during the red period, the surface period PR, the green sub-surface period Pg, and the blue sub-surface period, the Ρβ liquid crystal will display light or opacity corresponding to the display data, so that the red light, the green light, and the blue light can display the image. Grayscale. For example, the 昼 昼 为 为 为 为 为 , w w w w w w w w w w w w w w w w w w w w w w w Please refer to _ 1B. When the screen is not red, the liquid crystal will only appear in the red sub-surface, so that the red light can display the gray scale of the image. The liquid crystal is in an opaque state in the green sub-surface and the blue sub-surface Pb, and the color light emitted by the respective light source and the blue light source respectively. At this time, in the entire surface, in the middle, the red enamel surface displayed only uses the red sub-surface period ^ R-member red light ‘that is, the actual display time of the red 昼 surface will be equal (even

201138547 w厶vi 0-0010-TW 34286twf.doc/I Less than) The three-point of the pF during the kneading period is greatly weakened, which affects the red 昼:; = the brightness of the red 昼 surface. [Invention] The present invention provides a The color 庠〇 increases the luminous day of the color silk (10)I: the light source control method of the limb, and the brightness of the color surface.卩 Increasing the color sequence of the silk thread in the display sheet The present invention proposes a color sequence comprising the following steps. The method of receiving the defect during the masking == method, which includes multiple dice during the period. According to the period, during the period of a mid-day surface, the surface of the surface is covered by a four-dimensional surface. The data is analyzed to obtain the order distribution. During the period of the surface, ===, some or all of the color night light sources. ::No open the color sequence display multiple light time is greater than the 4b dice* 'The color light source of the above is also the light source module and the control panel ^, the display panel, the panel" control module 2, 2, provide multiple color light sources to the display material for data analysis (four) draw material 'and according to the picture. The control module is based on =3=:: more than 3 color gray scale points, some color light sources are clothed: draw more than these (four) face two: = color light source illumination time system ί Γ Γ Γ New Zealand & age 8 The forest source control eight is based on the gray scale distribution of the two primary colors.

201138547 HD-2010-0010-TW 34286tvvf.doc/I When using a solid color, use less or no (4) color silk and turn on the color light source corresponding to the solid color. Among them, the color light source that is turned on will emit more time than its dice. Thereby, the illumination time of the color light source can be increased to increase the maximum brightness of the light source module. In some embodiments, the liquid crystal is prevented from leaking by turning off the color light source, thereby improving the color purity of the face. The above described features and advantages of the present invention will become more apparent from the description of the appended claims. [Embodiment] FIG. 2A is a system diagram of a color sequential display according to an embodiment of the present invention. Referring to FIG. 2A, a color sequential display (eg, a projector 2) includes a control module 210, a light source module 220, and a liquid crystal panel 230. The liquid crystal panel 230 may be a Liquid Crystal On Silicon (hereinafter referred to as Liquid Crystal On Silicon). The LCOS) panel, and the projector 200 can be a pico projector. The control module 210 receives the video signal VS, generates the display data DS to the liquid crystal panel 230 according to the facial data transmitted by the video signal VS, and generates the driving signal SDR to the light source module 220. The liquid crystal panel 230 displays the sub-surfaces corresponding to different colors according to the display data DS, and the light source module 220 synchronously supplies the corresponding color light to the liquid crystal panel 230 according to the driving signal SDR. The liquid crystal panel 230 projects light to a target (such as a curtain or a wall) by the light source provided by the reflective/transmissive light source module 220 to display an image. In this embodiment, the liquid crystal panel 230 is in color sequential LCOS (Color

201138547 HD-2010-0010-TW 34286twf.doc/I

Sequendal LC 〇 S ' CS-LCOS) is an example, so that the color filter is not formed on the liquid crystal panel 23 . Moreover, the projector 2 实现 uses the color sequence (c〇l〇r Sequential, CS) method to realize temporal mixing to display a color image. At this time, the light source module 220 can correspondingly provide vehicles of different colors (such as red light, blue light, and green light) during a plurality of different times in the 昼 Ρ 。. The towel 'red light, blue light and green light can be provided by the light-emitting diode of the corresponding color, that is, the light-emitting diode, the blue light-emitting diode and the green light-emitting diode are used as the pulse light source. Blue light green light source. FIG. 2B is a schematic diagram of the system of the control module 21A of FIG. 2A. Please refer to Figure 2A and below. 2B, the control module 21A includes a signal processing unit 21, a data analysis unit 2!3, and a light source control unit. The signal processing unit is called to receive the (four) plane material received by the video money VS, and generates the display data DS according to the Wei signal %. The signal processing unit 211 can generate a shouting undesired DS by using image simulation technology, such as frame rate control (Fr_eRate Co 1) method or pixel dithering method, data analysis, single S 2 〗 3, receiving video The picture data and the display data DS transmitted by the signal vs are analyzed, and the analysis surface to be displayed is analyzed based on the face data and the display data, and the analysis result RA is generated accordingly. The light source control unit 215 generates a driving SDR according to the analysis result μ [the sub-light source control unit 215 provides a corresponding number of county money sdr according to the number of color ¥ light sources provided by the light source module 220. Here, the light source module 220 is assumed to provide red light, blue light, and green light. Thus, the light source control unit 215 correspondingly generates three drive signals.

Rtiy-ζΛ; wO〇i〇-tw 34286twf.doc/I SDR to control the red light-emitting diode, the blue light-emitting diode, and the green light-emitting diode, respectively. Further, when the data analysis unit 213 receives the face data and the display data DS during a facet, the data analysis unit 213 performs analysis to obtain the gray scale distribution of the three primary colors (ie, red, blue, and green) as an analysis. The result is RA. In the case where the entire surface is a single color, when the gray level average of the gray scale distribution of one of the two primary colors is less than or equal to - the value of f, it means that the surface has almost no such color component. Therefore, the light source control unit 215 can turn off the color light source of the color when displaying the face (during the belonging picture period), and vice versa, when the gray level average of the gray scale distribution of the color is greater than the critical value, the light source control unit 215 will correspondingly turn on the color light source of this color. ~ For example, when the gray level average of the gray scale distribution of the red color in the two primary colors is less than or equal to a critical value, it means that the pupil surface has almost no red component, so the light source control unit 2丨5 can be in the pupil period p F Turning off the red light source; conversely, when the gray level average of the gray scale distribution of the red is greater than the threshold value, the light source control unit 215 correspondingly turns on the red light source. The critical value is generally a lower grayscale value (for example, a grayscale value of 15). However, the critical value may be different depending on the actual circuit design and the habit of not using it, and is not limited thereto. In addition, in addition to determining whether to turn off the color light source according to the grayscale average value of each color, the light source control unit 215 can also determine whether to close the corresponding shape light source according to whether the range of each color is within the critical range. . In other words, when the grayscale distribution of a certain color is located in the

201138547 HD-2010-0010-xw 34286twf.doc/I Around the 'light source control unit 215 _ close the color light source corresponding to this color; conversely, when the gray scale distribution range of this color exceeds the critical range, then the light source control unit 215 turns on the color light source corresponding to this color. 3A to 3H are schematic diagrams showing driving waveforms of different solid color planes according to an embodiment of the present invention. Referring to Fig. 2B and Fig. 3A, it is assumed here that the period PF is divided into a red sub-plane period Pr, a green sub-frame period & and a monitor color: a face period Pb. The signal processing unit 211 generates a display data DS including red sub-surface data, green sub-surface data, and blue sub-surface data according to the video signal to the display panel 23G, wherein the panel 230 will be in the red sub-surface period Pr The green sub-surface period h and the blue sub-surface period PB respectively display the corresponding red sub-surfaces 2 and blue sub-picture data. If the video money vs=== f F has the full red facet data, the data analysis unit commits the gray scale distribution of the two primary colors after analyzing the video signal VS and/or the display data DS. Transfer to the light source control unit 215. In the red kneading surface, the blue and green dopings are less = the blue and green neon average material is smaller than the threshold value miscellaneous or the a color and the green color distribution B are in the silk boundary range. For the 1st of the red, the grayscale average will cut the critical value, or the red grayscale knife cloth will exceed the critical range. Therefore, the light source control unit will make the closing: = blue light source of the PB during the blue sub-surface And corresponding to the green "green light source of the surface S Pg" and only open the red light source corresponding to the red sub-surface period P; In addition, the red light source will have a longer illumination time than the corresponding sub-surface period [S] 9 201138547 HD-2010 -0010-TW 34286twf.doc/I IV In this embodiment, the red light source emits light (4) 'the liquid crystal will correspond to the state of the wire, and the light is not the gray level of the image. Since the red light is behind the surface _ &amp In the case of the holding, the usage rate of the red light source can be increased by the maximum brightness when the crystal panel 230 displays the full red surface. The liquid crystal = like ground, if the video signal vs _ is shown during the ^ surface period & = face data, then the control material 215 controls the light source mode to continue to provide green light during the PF, while the red light source is turned off, and its driving waveform is as shown in Fig. 3B. = Displayed during the bucking period b The blue faceted book control unit 215 controls the light source combination & 2 Holding, % provides blue light' and the red light source and green light source s are turned off, and the driving waveform is as shown in Fig. 3C. In the next jr aspect, the above-mentioned red light source, green light source and blue light source are not limited. It is equal to the ρρ period ρρ, but can be smaller than the 昼面期F 仁 is still greater than the corresponding dice 昼 surface period. For other pure, such as yellow, #色(eyan), magenta (ah), etc. The light source control unit 215 can control the light source module 2 to turn on the plurality of color light sources simultaneously in the red:, green light source, and the blue light source. The illumination time of the upper light source, the green light source, and the blue light source can also be equal to 昼= Between ^ or less than the surface period Pf' but still greater than the red sub-surface period PR, 'the pro-color sub-surface period PG and the blue sub-surface period PB, please refer to Figure 3D, if the video signal Vs _Showed during the face.

201138547 HD-2010-0010-TW 34286twf.doc/I has the full yellow face (ie, the mixed color of red and green), the light source control unit 215 controls the light source module 220 to turn off the blue light during the kneading process 'And the red light source and the green light source will be turned on to emit light. The red light source and the green light source will simultaneously emit light during the red sub-plane and the green sub-surface during the PG, that is, the red light source and the green light source have the same 'luminescence k, and the red light source and the green light source emit time. It will be equal to the sum of the PGs during the period of the red sub-plane and the period of the green sub-plane. Second, the blue light source will be turned off, so the display panel 230 will not leak blue light in the blue sub-writing period ^ P b . Therefore, this embodiment can improve the problem of color purity and enhance the overall brightness of the yellow face. Similarly, referring to FIG. 3E, if the video signal vs is displayed, the light source control unit 215 controls the light source module when the PF towel has a full cyan surface (ie, a mixture of green and blue colors). 22〇 Turn off the red car during the screen period = while the green light source and the blue light source will be turned on and send a ++ and the green light source and the color light source will be simultaneously during the green sub-picture pG and the friend dice face pB Glowing. And right-handed 3F, if the video VS shows the face data of the two full magenta facets (that is, the mixed colors of red and blue) in the PF during the kneading process, the 兀 制 制 兀 215 control light source module 220 is During the kneading period, Pf is turned off: the source, and the red light source and the blue light source are turned on to emit light. And check = source and blue light source will glow simultaneously in the red sub-surface _~ and blue sub-Ρβ+. In some embodiments, the red light source and the blue light source are illuminated during the period of the red light source and the blue light source, and the liquid crystal panel 230 is correspondingly

II 201138547

HD-2010-0010-TW 34286twf.doc/I The pG is in a light transmitting state during the green sub-surface. Similarly, referring to FIG. 3G, if the video signal vs is displayed on the facet data of the full white picture (ie, the mixed color of red, green, and blue) in the facet period Pf, the light source control unit 215 controls the light source module 220. The red light source, the green light source, and the blue light source are turned on while the PF is turned on during the kneading. Referring to FIG. 3H, if the video signal VS displays the facet data of the full black picture in the facet period &, the light source control unit 215 controls the light source module 220 to turn off the red light source, the green light source, and the blue during the facet period Pf. The color light source is such that the red light source, the green light source, and the blue light source will not emit light during the book. - According to the above, if the data analysis unit 213 receives a pure color, such as pure red, pure green, pure blue, pure yellow, pure magenta, pure blue or pure $, which is close to a solid color, the data analysis unit commits Through the light source (4) 凡 215 turns on the red light source, the green light source and the blue light source = early and close the remaining color light source. Moreover, in the period of the opening of the color of the color of the king, or during the period of the face, the color of the opened is continued. Since the source of each color light source increases the maximum brightness of the solid color surface, and the source is turned off, the power consumption of the light source module 22 () is reduced. Shape light, according to the above, can be integrated into a single-color sequential display. Figure 4 is a flow diagram of a color sequential display: 'J-party method in accordance with the present invention. Referring to FIG. 4, first, the 贡 贡 贡 ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( 12 201138547

HD-2010-0010-TW 34286twf.doc/I The dice face period pB). Then, data analysis is performed based on the faceted data to obtain a grayscale distribution of the three primary colors in the facet data (step S420). Then, according to the gray scale distribution of the three primary colors, determining whether to turn on part or all of the plurality of color light sources provided by the light source module of the color sequential display during the kneading period, wherein the color light source is turned on. When illuminating, it is larger than any of these dice. The details of each step can be found in the above description, and will not be described here. In summary, the color sequential display and the light source of the embodiment of the present invention control the gray scale distribution according to the three primary colors, and close the color rule with less or no use when the obtained data is treacherous, and open the opposite side. Color source. A color light source that illuminates during a plurality of dice pictures or throughout the illuminating light will continue to illuminate. By increasing the color == inter-substance illumination time, the embodiment of the present invention can increase the color light source that can be used in the embodiment = light = off, and the present invention is turned off. For the first question, the color purity of the ribbed surface. Furthermore, the power consumption of the module is reduced to the color light source. The present invention can reduce the light source of the present invention. Any example disclosed above is not intended to limit the essence of the present invention. The scope of protection, within the circumference of the 'can be made a little more detailed fine, the surrounding is subject to the scope of the patent application attached to the latter. [Simple diagram of the diagram] Figure 1 is a schematic diagram of the driving waveform of a conventional color sequential display

201138547 HD-2U1U-0010-TW 34286twf.doc/I Figure IB shows the drive waveform of a red-faced display on a conventional color-sequential display. 2A is a schematic diagram of a system of a color sequential display in accordance with an embodiment of the present invention. 2B is a schematic diagram of the system of the control module of FIG. 2A. 3A to 3H are schematic diagrams showing driving waveforms of different solid color planes according to an embodiment of the present invention. 4 is a flow chart of a light source control method in accordance with an embodiment of the present invention. [Main component symbol description] 200: Projector 210: Control module 211: Signal processing unit 213: Data analysis unit 215: Light source control unit 220: Light source module 230. Liquid crystal panel VS: Video signal SDR: Drive signal RA: Analysis Result DS: Display data PF: during the face

Pn, Pg, PB: dice face period S410, S420, S430: steps

Claims (1)

201138547 HD-2010-0010-TW 34286twf.doc/I VII. Patent application scope: A light source control method for a color sequential display receives a facet data during a facet period, multiple dice facets; : Λ 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼Whether or not • Xiao Qi is part or all of the plurality of color light sources of the color sequential display, wherein the color light source of the upper back light source has a light emission time longer than any one of the color dice period. A batch of light source method of the color sequential display according to claim 1, wherein "in accordance with the gray scale distribution of the colors, whether the color sequential display is turned on during the kneading period The step of "partial or all of the plurality of color light sources" includes: turning on the first color of the color light sources when the average value of the first color/gray scale of the colors is greater than a threshold value a first color light source; and when the gray level average is less than or equal to the threshold, the first color light source is turned off. 3. The light source control method of the color sequential display according to claim 1, wherein "determining whether to turn on the plurality of color light sources of the color sequential display during the kneading period according to the gray scale distribution of the colors The step of "partial or all" includes: turning on the color light sources when the range of the first color of the colors exceeds the range of the range of 201138547 HD-2010-0010-TW 34286 twf.doc/I a color light source corresponding to the first color; and ^ - when the gray scale distribution range of the first color is located in the critical range, the first color light source is turned off. 4. The control method of the color sequential display according to claim 1, wherein when the plurality of color light sources are turned on, the light emitting times of the source color light sources are the same as each other. 5. The color-sequence display control method according to claim 2, wherein when the number of color light sources turned on is plural, the light-emitting time of the color light source is equal to that during the color sub-pictures; The sum of two two. .丨仞 or all 6· as described in the scope of the patent application, the color sequence=method of the color light source of the above-mentioned open color; the color sequence control method as described in the patent application scope ,i, wherein The color light source is turned on at the same time as the light source 8. The color sequence display comprises: a display panel; -^ Huan, the pure color vehicle, the simple (5) board and a control module are received, and a screen is received during a screen. The module performs (4) analysis according to the kneading data, and determines, by the gray scale distribution of the plurality of colors of the control, and the distribution of the gray scales in the middle surface, whether some or all of the colors are determined during the kneading period 'Where the picture period contains multiple colors==== 16 201138547 HD-201 〇-〇〇10-TW 34286twf.doc/I The above-mentioned color light source has a light-emitting time longer than any of these dice. 9. The color sequential display of claim 8, wherein the control module comprises: a signal processing unit that receives the defective data to generate a plurality of display materials according to the facial data to the display panel a data analysis unit that receives the kneading data and the display data, and analyzes the kneading data and the display data to obtain the gray scale distribution of the colors as an analysis result; and a light source The control unit receives the analysis result to determine whether to turn on part or all of the color light sources. 10. The color sequential display of claim 8, wherein the control module turns on the light source module when a grayscale average value of a first color of the colors is greater than a threshold value. a first color light source corresponding to the first color in the color light source, and the control module turns off the first color light source of the light source module when the gray level average value is less than or equal to the critical value. The color-sequential display of claim 8, wherein the control module turns on the light source module when a gray scale distribution range of a first color of the colors exceeds a critical threshold a first color light source corresponding to the first color π of the color light sources, and the control module turns off the light source module when the gray scale distribution range of the first color office is located in the critical range The first color light source. 12. The color sequential display according to claim 8 of the patent application, wherein the light time of the opening is 17 201138547 HD-2010-001 〇-TW 34286 twf.doc/I Same for each other. / Light 'original hair' 13. The color sequence _ as described in item 8 of the patent scope. When there are a plurality of color light sources that are turned on, the ones are turned on: the pirates whose light time is equal to the portion of the dice during the period (four) all of them 14. The color sequence as described in claim 8 The illumination time of the above-mentioned turned-on color light source in the type display is equal to that of the kneading period. 15. The color-sequential display as described in claim 8 of the patent application simultaneously emits the above-mentioned color light source at the same time. °°