CN100583964C - TV set backlight brightness control system and method and TV set - Google Patents

TV set backlight brightness control system and method and TV set Download PDF

Info

Publication number
CN100583964C
CN100583964C CN 200510090081 CN200510090081A CN100583964C CN 100583964 C CN100583964 C CN 100583964C CN 200510090081 CN200510090081 CN 200510090081 CN 200510090081 A CN200510090081 A CN 200510090081A CN 100583964 C CN100583964 C CN 100583964C
Authority
CN
China
Prior art keywords
backlight
control
television
brightness
connected
Prior art date
Application number
CN 200510090081
Other languages
Chinese (zh)
Other versions
CN1913608A (en
Inventor
强 刘
王中振
翟翌立
黄俊杰
Original Assignee
海尔集团公司;青岛海尔电子有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 海尔集团公司;青岛海尔电子有限公司 filed Critical 海尔集团公司;青岛海尔电子有限公司
Priority to CN 200510090081 priority Critical patent/CN100583964C/en
Publication of CN1913608A publication Critical patent/CN1913608A/en
Application granted granted Critical
Publication of CN100583964C publication Critical patent/CN100583964C/en

Links

Abstract

The invention discloses a control system for regulating the backlight-brightness of the display-panel in television including: a television programmable control center used for outputting the pulse width modulation (PWM) to regulate the backlight-brightness, a demodulation circuit connected with the programmable control center to amplify and convert the PWM and output a gradually changing voltage signal to the backlight of the described display panel for gradually changing its brightness.

Description

一种电视机背光亮度控制系统及方法以及电视机 A television system and method for brightness control of the backlight and televisions

技术领域 FIELD

本发明涉及电视机的背光亮度的调节技术,特别是涉及一种电视机背光亮度控制系统及方法以及采用该系统的电视机。 The present invention relates to adjusting the backlight brightness of a television technology, particularly to a television system and a backlight brightness control method and the use of the television system.

背景技术 Background technique

随着社会及科技的进展,电视机已经日益得到普及,在人们的日常生活中占据着不可忽略的地位,使得人们的生活更为丰富多彩。 With the development of society and technology, television has increasingly gained popularity, occupy a non-negligible role in people's daily life, making people's lives more colorful.

目前,应用液晶显示技术的液晶电视机也已经出现在市场上,并且由于液晶电视机相对于传统的电视机来说具有自身独到的长处,因此有望成为日后的主流产品。 At present, the application of liquid crystal display technology of LCD TV also has appeared on the market, and since LCD TV compared to conventional television, it has its own unique strengths, it is expected to become the future mainstream products. 对于液晶电视机来说,由于液晶屏自身不能主动发光,因此需要采用背光源来进行照明。 For a liquid crystal television, because the liquid crystal panel itself does not self-luminous, it is necessary to use a backlight illumination.

现有技术的液晶电视机在开机时,会突然向液晶屏的背光源施加大电压、 大电流,从而对背光源造成冲击,使得其使用寿命不可避免地受到影响,而且 In the prior art liquid crystal television boot, suddenly applied to a large LCD backlight voltage, high current, and thus impact on the backlight, so that its life is inevitably affected, and

会造成对液晶屏的不良影响;加上这种方式必然导致液晶电视的显示亮度由暗瞬间变亮,也会导致对用户的视力的损害。 May have adverse effects on the LCD screen; plus this way will inevitably lead to the brightness of the LCD TV display by brightening dark moment, it can lead to damage to the user's vision.

此外,现有技术的液晶电视机在关机时,也是突然变暗,同样存在不良的影响。 In addition, the prior art LCD TV at shutdown, is suddenly dimmed, there are also adversely affected.

发明内容 SUMMARY

本发明解决的技术问题在于提供一种电视机背光亮度控制系统及方法以及采用该系统的电视机,可以控制电视机背光亮度实现比较緩慢的变化。 The present invention solves the technical problem is to provide a television system and a backlight brightness control method and a system using the television set, the television may be controlled to achieve the backlight luminance changes relatively slowly.

为此,本发明解决技术问题的技术方案是:提供一种电视机背光亮度控制系统,用于调节电视机显示面板的背光源的亮度,包括: To this end, the present invention is to solve the technical solution Problem: to provide a TV backlight brightness control system for adjusting luminance of the backlight of the TV to display panel, comprising:

电视机程序控制中心,用于在需要调节电视机的背光亮度时输出连续变化的脉宽调制信号; TV program control center for outputting a continuous change in the need to adjust the backlight brightness TV pulse width modulation signal;

解调控制电路,连接到该电视机程序控制中心,放大并转换前述脉宽调制信号,输出电压值逐渐变化的电源控制信号至所述显示面板的背光源,使其亮度逐渐变化;其中,所述解调控制电路包括: Demodulation control circuit connected to the television program control center, a control signal is amplified and converted to power the pulse width modulation signal, an output voltage value of the backlight gradually changes to the display panel, so that the luminance changes gradually; wherein the demodulating said control circuit comprises:

三极管,其基极连接到电视机程序控制中心的脉宽调制信号端口,发射极接地,集电极连接到VCC电源; Transistor, whose base is connected to the pulse width modulated signal television program port control center, emitter grounded, the collector connected to VCC power supply;

串联在VDDM电源和地之间的第一电阻和第三电容;所述第一电阻和第三电容的节点连接到所述三极管的基极; Connected in series between the power supply and ground VDDM first resistor and a third capacitor; the first node of the third capacitor and the resistor connected to the base electrode of the transistor;

连接该三极管的集电极和所述显示面板的背光控制接口的第五电阻。 Connected to the collector of the transistor of the display panel and a backlight control interface fifth resistor.

优选地,所述解调控制电路还包括:第一电容和第二电容,并联连接在该第五电阻和背光控制接口的节点和地之间。 Preferably, the demodulation control circuit further comprises: a first capacitor and a second capacitor, connected in parallel between the fifth resistor and a backlight control interface node and ground.

优选地,该电视机程序控制中心将电视机开机、关机时间和/或正常收视状态下用户通过菜单方式调节亮度时设置为需要调节电视机的背光亮度的时间。 Preferably, the control center to the television television program on, off time set by the user when the need to adjust the time to adjust the brightness of the backlight brightness menu mode by the television and / or normal viewing state.

本发明还提供一种电视机,包括具有背光源的显示面板,还包括电视机背光亮度控制系统,用于调节电视机显示面板的背光源的亮度,该控制系统包括: The present invention also provides a television set, comprising a display panel having a backlight, the backlight brightness control further comprises a television system, a television display for adjusting luminance of the backlight panel, the control system comprising:

电视机程序控制中心,用于在需要调节电视机的背光亮度时输出连续变化的脉宽调制信号; TV program control center for outputting a continuous change in the need to adjust the backlight brightness TV pulse width modulation signal;

解调控制电路,连接到该电视机程序控制中心,放大并转换前述脉宽调制信号,输出电压值逐渐变化的电源控制信号至所述显示面板的背光源,使其亮度逐渐变化; Demodulation control circuit connected to the television program control center, a control signal is amplified and converted to power the pulse width modulation signal, an output voltage value of the backlight gradually changes to the display panel, so that the luminance is gradually changed;

其中,所述解调控制电路包括: Wherein said demodulation control circuit comprises:

三极管,其基极连接到电视机程序控制中心的脉宽调制信号端口,发射极接地,集电极连接到VCC电源; Transistor, whose base is connected to the pulse width modulated signal television program port control center, emitter grounded, the collector connected to VCC power supply;

串联在VDDM电源和地之间的第一电阻和第三电容;所述第一电阻和第三电容的节点连接到所述三极管的基极; Connected in series between the power supply and ground VDDM first resistor and a third capacitor; the first node of the third capacitor and the resistor connected to the base electrode of the transistor;

连接该三极管的集电极和所述显示面板的背光控制接口的第五电阻。 Connected to the collector of the transistor of the display panel and a backlight control interface fifth resistor.

本发明还提供一种电视机背光亮度控制方法,包括步骤: The present invention also provides a television backlight brightness control method, comprising the steps of:

1) 电视机程序控制中心解析背光亮度改变指令; 1) Program control center analyzing TV backlight brightness change instruction;

2) 电视机程序控制中心根据该背光亮度改变指令,输出连续变化的脉宽调制信号至解调控制电路; 2) to change the television program control instruction according to the central brightness of the backlight, continuously varying the output pulse width modulated signals to the demodulation control circuit;

53) 解调控制电路放大并转换该脉宽调制信号显示面板的背光源的电源控 53) demodulation control circuit amplifies the PWM signal and converting the display backlight power supply control panel

制信号后输出; After the system output signal;

4) 背光源在该电源控制信号的控制下,其亮度发生逐渐变化。 4) The backlight under the control of the power control signal, the luminance is gradually changed. 优选地,所述步骤l)还包括:在电视机开机、关机时和/或在用户通过菜 Preferably, said step l) further comprising: a power in a television, and / or a user menu Shutdown

单方式调节背光亮度时产生该背光亮度改变指令。 When generating the backlight luminance adjusting the backlight brightness single mode change instruction.

相对于现有技术,本发明的有益效果是:由于本发明在调节电视机显示面板的背光源的亮度时,输出变化的脉宽调制信号,实现对电视机的背光源的电源的自动控制,并利用这个自动变化的电源来调节亮度緩慢变化,从而避免亮度突然变化对背光源的冲击,延长背光源和显示面板的使用寿命,并且减少对用户的视力的损害。 With respect to the prior art, the beneficial effects of the invention are: Since the present invention in modulating the pulse width modulated signal is a television display luminance of the backlight of the panel, the output changes, the automatic control of the backlight power supply of a television set, and use this power supply automatically changed to adjust the brightness changes slowly, so as to avoid the impact of sudden changes in the brightness of the backlight, to extend the service life of the backlight and the display panel, and reduce damage to the user's vision.

在本发明的优选方案中,在开机、关机时以及用户调节亮度时对液晶显示面板的亮度进行控制。 In a preferred embodiment of the present invention, in the boot, the brightness of the liquid crystal display panel when the user adjusts the brightness control and shutdown. 附图说明 BRIEF DESCRIPTION

图l是本发明的电视机的框图; Figure l is a block diagram of a television according to the present invention;

图2是图1所示的解调控制电路的一个实施例的电路图; 图3是本发明的电视机背光亮度控制方法的流程图。 FIG 2 is a circuit diagram of one embodiment of the embodiment shown in FIG demodulation control circuit; FIG. 3 is a flowchart of the TV backlight brightness control method of the present invention. 具体实施方式 Detailed ways

请参阅图l,是本发明的电视机的框图。 Referring to FIG. L, a block diagram of a television according to the present invention.

电视机包括电视机背光亮度控制系统100、用户输入单元200、菜单信息控制接口300、液晶显示面板卯O。 TV system comprising a TV backlight luminance controller 100, a user input unit 200, a menu information control interface 300, the liquid crystal display panel O. d

用户输入单元200用于生成与用户的操作所对应的各种控制指令,包括 A user input unit 200 generates various control commands corresponding to user's operation, comprising

开、关机指令,以及正常收视状态下通过菜单调节方式进行#:作所对应的控制 Open, shutdown command, and a normal viewing state # menu adjustment: as the corresponding control

指令等。 Instruction and so on.

用户输入单元200可以是进行远距控制的遥控器,也可以是设置在电视机上的按钮等器件。 The user input unit 200 may be a remote control for the remote control buttons may be provided on the TV and other devices.

菜单信息控制接口300主要用于在正常收视状态下实现菜单调节信息的传输。 Menu information control interface 300 is mainly used for transmission of a menu adjustment information in a normal viewing state.

该电视机背光亮度控制系统100用于在电视机开关机时控制液晶显示面板900的背光源910的亮度緩慢变化,电视才/l4呈序控制中心(CPU) 110、解调控制电路120,其中电视机程序控制中心110接收用户通过用户输入单元200 输入的操作指令并进行处理;电视机程序控制中心110连接解调控制电路120, 控制并协调各部分的工作;解调控制电路120则用于输出控制电源到背光源910。 The television backlight brightness control system 100 for controlling the TV switch panel 900 of the luminance of the backlight 910 changes slowly, only TV / l4 as a sequence control center (CPU) 110, a demodulation circuit 120 controls the liquid crystal display, wherein TV program 110 receives a user control center via the user input unit 200 and an operation instruction processing; television program control center 110 is connected to the demodulation control circuit 120, the control and coordination of the various parts; demodulation control circuit 120 for control power output to the backlight 910.

电视机程序控制中心110是电视机的核心器件,内部存储与背光亮度控制相关的程序代码,主要用于在电视机开关机时通过软件控制发出PWM (脉宽调制)信号,以緩慢调节电视机的背光亮度。 TV 110 is a television program control center core of the device, and the program code stored internally associated backlight brightness control, mainly used when the TV switch emits PWM (Pulse Width Modulation) signal by software control to adjust the TV slow backlight brightness. 此外,在正常收视状态下,也可以通过发出PWM信号来实现对背光亮度的调节。 Further, in a normal viewing state, may be realized to adjust the backlight brightness by sending the PWM signal.

解调控制电路120用于放大该电视机程序控制中心110发出的PWM信号, 将其转换成背光源910的电源控制信号后输出至液晶显示面板900。 After demodulation control circuit 120 for amplifying the PWM signal of the television program of the control center 110 issues, converts it into a power control signal to the backlight 910 of the liquid crystal display panel 900 outputs.

请一并参阅图2,是图1所示的解调控制电路的一个实施例的电路图。 Referring to FIG. 2 is a circuit diagram showing an embodiment of the demodulation circuit shown in Figure 1 of the control.

所述解调控制电路120中,第一电阻R1和第三电容C3串联在VDDM电源和地之间。 The demodulation control circuit 120, the first resistor R1 and third capacitor C3 connected in series between the power supply and ground VDDM. 三极管Ql的基极1通过第七电阻R7连接到第一电阻Rl和第三电容C3之间的第一节点(未标示);三极管Ql的发射极2接地;三极管Ql 的集电极3通过第二电阻R2连接VCC电源。 Transistor Ql 1 is connected to the base through a seventh resistor R7 to the first resistor Rl and the first node (not shown) between the third capacitor C3; second ground electrode of the emitter of transistor Ql; Ql collector of the transistor 3 through the second VCC power supply connected to the resistor R2.

其中,该第一节点作为解调控制电路120的输入端,通过第六电阻R6连接到电视i/L程序控制中心110的一个PWMI/0 口;三极管Q1的集电极3和第二电阻R2之间的第二节点(未标示)通过第五电阻R5连接到液晶显示面板900的背光控制接口920;在电阻R5和背光控制接口920的节点和地之间并联连接第一电容C1和第二电容C2。 Wherein the first node as an input terminal of the demodulation circuit 120 controls, coupled to a PWMI / 0 port TV i / L program control center 110 through the sixth resistor R6; the collector of transistor Q1 and the second resistor R2 of 3 a second node (not shown) between the liquid crystal display panel 900 is connected to the backlight control interface 920 via a fifth resistor R5; connecting a first capacitor C1 and the second capacitor in parallel between the node and interface 920 in resistor R5 and a backlight control C2.

请参阅图3,是本发明的电视机背光亮度控制方法的流程图。 See FIG. 3 is a flowchart of the TV backlight brightness control method of the present invention.

步骤S310,电3见机程序控制中心IIO解析背光亮度改变指令; Step S310, the electric program control center 3 IIO see Analytical backlight brightness change instruction;

所述背光亮度改变指令产生在电视机开机、关机时或者产生在用户通过菜单方式调节亮度时。 The backlight brightness change instruction generation in a television boot, shutdown, or when the user adjusts the brightness generated by the menu mode.

步骤S320,电视机程序控制中心IIO根据该背光亮度改变指令,输出PWM 控制信号至解调控制电路140; Step S320, the TV program control center in accordance with the change instruction IIO luminance of the backlight, the PWM control signal to the demodulation output control circuit 140;

步骤S330,解调控制电路120放大该PWM控制信号,并转换成背光源910的电源控制信号后输出; Step S330, the demodulation control circuit 120 amplifies the PWM control signal, and converting to the power source 910 of the backlight control signal output;

7步骤S340,背光源910在该电源控制信号的控制下,其亮度发生緩慢的变化。 7 step S340, the backlight under the control of the power control signal, the luminance gradually changes 910.

为便于理解本发明,下面以电视机的开机过程为例对本发明进行详细描述。 To facilitate understanding of the present invention, the following procedure in order to start the TV as an example of the present invention will be described in detail.

电视开机系统初始化完成后,由软件控制芯片(CPU)的一个PWM I/O 口,电视机背光亮度控制系统自动在短时间输出一组连续变化的由低到高最后稳定的电压值。 After initialization is complete television system boot, automatically output a set of continuously changing in a short time by the software control PWM I / O port, TV backlight brightness control system chip (CPU) from low to high stability of the final voltage value. 利用所述连续变化的电压值自动控制液晶显示面板上相应的背光控制接口,达到控制液晶显示面板在开机过程中软启动(慢慢由暗到亮并稳定)的目的。 With the continuous change in the voltage value of the automatic control of the liquid crystal display panel corresponding to the backlight control interface panel control purposes the soft-start the boot process (gradually from dark to light and stability) of the liquid crystal display.

综上所述,本发明主要实现的是电视4几的背光源的一组电源的自动控制, 并利用这个自动变化的电源在开机、关机时以及用户调节亮度时对液晶显示面板900的亮度进行控制。 In summary, the present invention is mainly to achieve automatic control of a television set backlight power source 4 is several, and use this power is automatically changed in the boot, shutdown and the luminance of the liquid crystal display panel 900 when the user adjusts the brightness control.

以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰, 这些改进和润饰也应^L为本发明的保护范围。 The above are only preferred embodiments of the present invention, it should be noted that those of ordinary skill in the art, in the present invention without departing from the principles of the premise, can make various improvements and modifications, improvements and modifications are also ^ L be the scope of the present invention.

Claims (6)

1.一种电视机背光亮度控制系统,用于调节电视机显示面板的背光源的亮度,其特征在于,包括: 电视机程序控制中心,用于在需要调节电视机的背光亮度时输出连续变化的脉宽调制信号; 解调控制电路,连接到该电视机程序控制中心,放大并转换前述脉宽调制信号,输出电压值逐渐变化的电源控制信号至所述显示面板的背光源,使其亮度逐渐变化; 其中,所述解调控制电路包括: 三极管,其基极连接到电视机程序控制中心的脉宽调制信号端口,发射极接地,集电极连接到VCC电源; 串联在VDDM电源和地之间的第一电阻和第三电容;所述第一电阻和第三电容的节点连接到所述三极管的基极; 连接该三极管的集电极和所述显示面板的背光控制接口的第五电阻。 1. A television backlight brightness control system for adjusting the brightness of the television display backlight panel, comprising: a television program control center for outputting continuously changes need to adjust the backlight brightness when the TV the pulse width modulated signal; demodulating a control circuit connected to the television program control center, a control signal is amplified and converted to power the pulse width modulation signal, an output voltage value of the backlight gradually changes to the display panel, its brightness gradual change; wherein the demodulation control circuit comprising: a transistor, whose base is connected to the pulse width modulated signal television program port control center, emitter grounded, the collector connected to VCC power supply; VDDM connected in series to the power supply and a first resistor and a third capacitance; the first resistor and the third capacitor is connected to the base node of said transistor electrode; connected to the collector of the transistor and the fifth resistor display panel, a backlight control interface.
2. 如权利要求1所述的电视机背光亮度控制系统,其特征在于,所述解调控制电路还包括:第一电容和第二电容,并联连接在该第五电阻和背光控制接口的节点和地之间。 2. TV backlight brightness control system as recited in claim 1, wherein said demodulation control circuit further comprises: a first capacitor and a second capacitor, connected in parallel with the fifth resistor node and a backlight control interface and between places.
3. 如权利要求1所述的电视机背光亮度控制系统,其特征在于,该电视机程序控制中心将电视机开机、关机时间和/或正常收视状态下用户通过菜单方式调节亮度时设置为需要调节电视机的背光亮度的时间。 3. The TV backlight brightness control system as recited in claim 1, wherein the television program to a television power control center, the user sets the off time and / or normal viewing status menu mode when adjusting the brightness as required adjust the backlight brightness of a television time.
4. 一种电视机,包括具有背光源的显示面板,其特征在于,还包括电视机背光亮度控制系统,用于调节电视机显示面板的背光源的亮度,该控制系统包括:电视机程序控制中心,用于在需要调节电视机的背光亮度时输出连续变化的脉宽调制信号;解调控制电路,连接到该电视机程序控制中心,放大并转换前述脉宽调制信号,输出电压值逐渐变化的电源控制信号至所述显示面板的背光源,使其亮度逐渐变化;其中,所述解调控制电路包括:三极管,其基极连接到电视机程序控制中心的脉宽调制信号端口,发射极接地,集电极连接到VCC电源;串联在VDDM电源和地之间的第一电阻和第三电容;所述第一电阻和第三电容的节点连接到所述三极管的基极;连接该三极管的集电极和所述显示面板的背光控制接口的第五电阻。 A television set, comprising a display panel having a backlight, wherein the backlight brightness control further comprises a television system, a television display for adjusting luminance of the backlight panel, the control system comprising: a television program control Center for outputting a continuous change in the need to adjust the backlight brightness TV pulse width modulation signal; demodulating a control circuit connected to the control center television program, and converts the amplified pulse width modulated signal, the output voltage value is gradually changed the power supply control signal to the backlight of the display panel, so that the luminance changes gradually; wherein said demodulation control circuit comprising: a transistor, whose base is connected to the pulse width modulated signal television program port control center, an emitter ground, a collector connected to VCC power supply; VDDM connected in series between the power supply and ground and a third resistance of the first capacitor; the first resistor and the third capacitor node to the base of the transistor; connected to the transistor the collector of the display panel and a backlight control interface fifth resistor.
5. —种电视机背光亮度控制方法,其特征在于,所述方法利用如权利要求1至4任一项所述的电视机背光亮度控制系统控制电视机的背光亮度,包括步骤:1) 电视机程序控制中心解析背光亮度改变指令;2) 电视机程序控制中心根据该背光亮度改变指令,输出连续变化的脉宽调制信号至解调控制电路;3) 解调控制电路放大并转换该脉宽调制信号显示面板的背光源的电源控制信号后输出;4) 背光源在该电源控制信号的控制下,其亮度发生逐渐变化。 5. - Species TV backlight brightness control method, wherein the method utilizes as claimed in claim 1 to the backlight luminance of the backlight brightness control the television control system according to any one of the TV 4, comprising the steps of: 1) Television parsing program control center instruction to change the backlight brightness; 2) a television program in accordance with control center instruction to change the backlight brightness, continuously varying the output pulse width modulated signal to the demodulation control circuit; 3) demodulation control circuit for amplifying and converting the pulse width modulated signal after the display backlight power supply control signal output panel; 4) under control of the backlight power control signal gradually changes in brightness occur.
6. 如权利要求5所述的电视机背光亮度控制方法,其特征在于,所述步骤l)还包括:在电视机开机、关机时和/或在用户通过菜单方式调节背光亮度时产生该背光亮度改变指令。 6. TV backlight brightness control method according to claim 5, wherein said step l) further comprising: a television boot, shutdown and / or the backlight is generated when the user adjusts the backlight brightness by way of the menu brightness change instruction.
CN 200510090081 2005-08-12 2005-08-12 TV set backlight brightness control system and method and TV set CN100583964C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200510090081 CN100583964C (en) 2005-08-12 2005-08-12 TV set backlight brightness control system and method and TV set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200510090081 CN100583964C (en) 2005-08-12 2005-08-12 TV set backlight brightness control system and method and TV set

Publications (2)

Publication Number Publication Date
CN1913608A CN1913608A (en) 2007-02-14
CN100583964C true CN100583964C (en) 2010-01-20

Family

ID=37722361

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200510090081 CN100583964C (en) 2005-08-12 2005-08-12 TV set backlight brightness control system and method and TV set

Country Status (1)

Country Link
CN (1) CN100583964C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012212386A1 (en) * 2012-07-16 2014-01-16 Siemens Aktiengesellschaft Process image of a technical plant
CN102957886A (en) * 2012-11-13 2013-03-06 广东长虹电子有限公司 System and method for controlling television set backlight
CN103010093B (en) * 2012-12-10 2015-01-28 奇瑞汽车股份有限公司 Backlight processing method of automobile combination instrument
CN103873700A (en) * 2012-12-11 2014-06-18 联想(北京)有限公司 State switching method and device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1126406A (en) 1993-11-23 1996-07-10 德克萨斯仪器股份有限公司 Brightness and contrast control for a digital pulse-width modulated display system
CN1337823A (en) 2000-08-09 2002-02-27 海尔集团公司 Fade-in fade-out on-off method of television set
CN1367637A (en) 2002-01-27 2002-09-04 海尔集团公司 Intelligent control background lamp of TV set
JP2002323690A (en) 2001-04-25 2002-11-08 Sharp Corp Automatic light control method and device for liquid crystal display device
CN1393728A (en) 2001-06-22 2003-01-29 神达电脑股份有限公司 Correcting method of optical sensor for automatic brightness control of LCD
CN1547382A (en) 2003-12-02 2004-11-17 深圳创维-Rgb电子有限公司 A method of television set channel switching

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1126406A (en) 1993-11-23 1996-07-10 德克萨斯仪器股份有限公司 Brightness and contrast control for a digital pulse-width modulated display system
CN1337823A (en) 2000-08-09 2002-02-27 海尔集团公司 Fade-in fade-out on-off method of television set
JP2002323690A (en) 2001-04-25 2002-11-08 Sharp Corp Automatic light control method and device for liquid crystal display device
CN1393728A (en) 2001-06-22 2003-01-29 神达电脑股份有限公司 Correcting method of optical sensor for automatic brightness control of LCD
CN1367637A (en) 2002-01-27 2002-09-04 海尔集团公司 Intelligent control background lamp of TV set
CN1547382A (en) 2003-12-02 2004-11-17 深圳创维-Rgb电子有限公司 A method of television set channel switching

Also Published As

Publication number Publication date
CN1913608A (en) 2007-02-14

Similar Documents

Publication Publication Date Title
US5828351A (en) Method and apparatus of adjusting monitor display
CN2788297Y (en) Brightness controlling equipment and brightness controlling module
CN101383139B (en) Luminance control method for display screen
CN1802056A (en) Led drive circuit and control method
CN101083860A (en) Drive device for light emitting diode element, light source device, and display
CN101330784A (en) Radiotelecontrol intelligent light control system capable of setting control light hint map
CN1856815A (en) Method and system for controlling illuminating apparatus
TW201037599A (en) Switching operating modes of liquid crystal displays
EP2317826B1 (en) Energy-saving lamp with remote control and button dimming feature
CN101902855A (en) LED driving circuit and backlight module
CN101426313A (en) Back light source driving method for LED
CN101770151B (en) Luminance regulating system for miniature projector
CN1794044A (en) Liquid crystal display capable of automatic regulating brightness and its regulating method
CN101414695B (en) Method for prolonging battery usage time of electronic device and electronic device
JP4686644B2 (en) Liquid crystal display
JP2004126749A (en) Information processing device, information processing program and information processing system
CN101986381A (en) Method and device for recognizing liquid crystal display screen and terminal
CN1516103A (en) Display device and method
CN100341046C (en) Automatic brigtness control method for display
CN1925714B (en) Multistage light modulation control device for gas-discharge lamp and light modulation control method thereof
CN1862334A (en) Hand-held automatic apparatus for regulating backlight brightness and effect and method thereof
CN101222797B (en) Light emitting diode backlight system and method capable of adjusting color range
CN101572072A (en) Image display device and power-saving control method thereof
US20040001076A1 (en) Method and apparatus for adjusting brightness of an LCD display
CN100419932C (en) switch

Legal Events

Date Code Title Description
C06 Publication
C10 Entry into substantive examination
C14 Grant of patent or utility model
C41 Transfer of patent application or patent right or utility model