CN202285169U - Liquid crystal display (LCD) chromatic display circuit - Google Patents
Liquid crystal display (LCD) chromatic display circuit Download PDFInfo
- Publication number
- CN202285169U CN202285169U CN2011204123676U CN201120412367U CN202285169U CN 202285169 U CN202285169 U CN 202285169U CN 2011204123676 U CN2011204123676 U CN 2011204123676U CN 201120412367 U CN201120412367 U CN 201120412367U CN 202285169 U CN202285169 U CN 202285169U
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- lcd
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Abstract
The utility model discloses a liquid crystal display (LCD) chromatic display circuit which is characterized in that a main control chip is used for simultaneously transmitting a pulse-width modulation (PWM) signal to an LCD boosting drive unit and a light emitting diode (LED) drive unit according to the circuit; the LCD boosting drive unit is used for driving an LCD screen; and the LED drive unit is used for respectively driving a red light emitting diode, a yellow light emitting diode and a blue light emitting diode. Because of adopting the circuit, the circuit has the following advantages that: (1) a chromatic screen of a thin film transistor (TFT) technology is replaced by using an LCD for carrying out chromatic display, and the production cost is lowered; (2) the circuit has a simple structure and is easy to realize; and (3) different colors can be simultaneously displayed on one screen, or the change of colors in the same field at different time is realized.
Description
Technical field
The utility model relates to LCD and shows, the colored display circuit of particularly a kind of LCD.
Background technology
In today that the automobile industry competition turns white-hot day by day, control cost, utilize the function and the effect of low finished product Platform Implementation higher-end platform, become the main means in the product differentiation competition.
The color of bell character is general on the automobile instrument panel must adopt redness; The symbol of water temperature lamp adopts green under the normal situation of water temperature, in the time of the too high warning of water temperature, need use red the wait.To these color screens that requires present auto vendor general employing TFT technology on automobile instrument, the cost of its screen itself is exactly quite a few times of common segment encode screen, adds the cost variance of driving and main control chip, nearly ten times more than of overall price difference possibilities.
On common segment encode screen, realize colored the demonstration, accomplish the function that color screen could be accomplished, fundamentally reducing production costs is the problem that prior art need solve.
The utility model content
The utility model technical matters to be solved is, a kind of LCD is provided colored display circuit, utilizes LCD to reach the colored purpose that shows.
For solving the problems of the technologies described above, the technical scheme of the utility model is that the colored display circuit of a kind of LCD is characterized in that: to be main control chip pass to LCD boost driver element, LED driver element with pwm signal to described circuit simultaneously;
Boost drive unit drives LCD screen of described LCD; That described LED driver element drives respectively is red, yellow, blue three light emitting diodes, utilizes the boost signal electrode of driver element and then control LCD screen of main control chip control LCD, reaches the effect of on LCD screen, carrying out colored demonstration.
Described LCD screen passes to main control chip, the LCD driver element that boosts with temperature Control and Feedback signal, and its temperature is detected.
Described LCD screen is the negative screen that shows, and guarantees LCD screen printing opacity when the LCD signal electrode is high.
Described LED drive unit drives is red, yellow, the sequential of blue three light emitting diodes is a fixed value, and LCD boosts driver element according to the signal electrode of demonstrations needs control LCD screen, thereby realizes that LCD shields the demonstration of different colours.
The toggle frequency of the flicker frequency of described light emitting diode and LCD screen is 70-50Hz, thereby guarantees that human eye can not produce uncomfortable feeling because of flicker.
The boost control timing of driver element, LED driver element of described LCD is consistent, guarantees its synchronism.
The model of described main control chip is freescale HY64.
The colored display circuit of a kind of LCD, owing to adopt foregoing circuit, this circuit has the following advantages: 1, replace the color screen of TFT technology to carry out colour with LCD and show, reduce production costs; 2, circuit structure is simple, realizes easily; 3, can on a screen, demonstrate various colors simultaneously, perhaps realize of the variable color of same field at different time.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation;
Fig. 1 is the circuit diagram of the colored display circuit of a kind of LCD of the utility model;
Fig. 2 is the oscillogram of the colored display circuit of a kind of LCD of the utility model;
In Fig. 1,1, main control chip; 2, the LCD driver element that boosts; 3, LED driver element; 4, LCD screen.
Embodiment
The utility model utilizes the negative characteristic that shows screen upset printing opacity of LCD, through the pwm signal of control backlight color and the pwm signal of LCD upset, realizes the variable color of same field at different time; And utilize the flicker frequency of the frequency matching LED backlight of LCD field upset simultaneously, be implemented on the screen and demonstrate various colors simultaneously.The LCD screen that the utility model provides is compared with TFT display screen solution, and cost advantage is quite obvious.
As shown in Figure 1, to be main control chip 1 pass to LCD boost driver element 2, LED driver element 3 with pwm signal to the utility model simultaneously; Boost driver element 2 of LCD drives LCD screen 4; That LED driver element 3 drives respectively is red, yellow, blue three light emitting diodes, utilizes the boost signal electrode of driver element 2 and then control LCD screen 4 of main control chip 1 control LCD, reaches and on LCD screen 4, carries out the colored effect that shows.Simultaneously LCD screen 4 passes to main control chip 1, the LCD driver element 2 that boosts with temperature Control and Feedback signal, and its temperature is detected.The model of main control chip 1 is freescale HY64.
The sequential that LED driver element 3 drives red, yellow, blue three light emitting diodes are fixed value, and the LCD driver element 2 that boosts shields 4 signal electrode according to demonstrations needs control LCD, thus the demonstration that realization LCD shields 4 different colours.The toggle frequency of the flicker frequency of light emitting diode and LCD screen 4 is 70-50Hz, guarantees that human eye can not produce uncomfortable feeling because of flicker.
The boost control timing of driver element 2, LED driver element 3 of LCD is consistent, guarantees its synchronism.
The light emitting diode of the LED of the utility model is established the backlight of three kinds of colors altogether: redness, and green and blue.Utilize that pwm signal control LCD screen segment encode is bright, time interval of going out and the interval of LED-backlit flicker, and make the bright Frequency Synchronization of frequency and the LCD section of the color that must manifest to realize its change in color.
As shown in Figure 2, the LCD screen 4 of the utility model adopts the negative screen that shows, and that is to say to represent LCD screen printing opacity when the LCD signal electrode is high among the figure, for low then light tight.If it is high that the LCD signal electrode keeps always, then obtain red, green, the mixed light of Lan Sanse, i.e. white light.For another example shown in the figure: expect yellow display field, then utilize the time control of LCD signal electrode upset only to allow to see through red with green light, promptly obtain yellow display effect.In like manner can realize monochromatic light, red, green, blue display effect through the time of control LCD signal electrode upset.Red; Green, blue driving sequential is as shown in the figure to be confirmed, the LCD signal electrode is then controlled by the LCD driver element 2 that boosts; Main control chip 1 can be accomplished each section LCD signal electrode is adopted different sequential control, makes the section of same asynchronism(-nization) present various colors.Thus one, main control chip 1 can realize that through the control to LCD signal electrode liquid crystal flip-flop transition whole segment encode shields the display field of same time and can present different colours, and it is rich and varied that Show Color becomes; Perhaps same field can variable color under the control of drive signal.
Combine accompanying drawing that the utility model has been carried out exemplary description above; Obviously the concrete realization of the utility model does not receive the restriction of aforesaid way; As long as the various improvement of having adopted the utility model technical scheme to carry out; Or directly apply to other occasion without improvement, all within the protection domain of the utility model.
Claims (7)
1. the colored display circuit of a LCD is characterized in that: to be main control chip (1) pass to LCD boost driver element (2), LED driver element (3) with pwm signal to described circuit simultaneously;
The described LCD driver element (2) that boosts drives LCD screen (4); That described LED driver element (3) drives respectively is red, yellow, blue three light emitting diodes.
2. the colored display circuit of a kind of LCD according to claim 1 is characterized in that: described LCD screen (4) passes to main control chip (1), the LCD driver element (2) that boosts with temperature Control and Feedback signal.
3. the colored display circuit of a kind of LCD according to claim 1 and 2 is characterized in that: described LCD screen (4) is the negative screen that shows.
4. the colored display circuit of a kind of LCD according to claim 1; It is characterized in that: the sequential that described LED driver element (3) drives red, yellow, blue three light emitting diodes are fixed value, and the LCD driver element (2) that boosts is controlled the signal electrode that LCD shields (4) according to demonstrations needs.
5. according to claim 1 or the colored display circuit of 4 described a kind of LCD, it is characterized in that: the toggle frequency of the flicker frequency of described light emitting diode and LCD screen (4) is 70-50Hz.
6. the colored display circuit of a kind of LCD according to claim 1 is characterized in that: the boost control timing of driver element (2), LED driver element (3) of described LCD is consistent.
7. the colored display circuit of a kind of LCD according to claim 1 and 2, it is characterized in that: the model of described main control chip (1) is freescale HY64.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204123676U CN202285169U (en) | 2011-10-26 | 2011-10-26 | Liquid crystal display (LCD) chromatic display circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204123676U CN202285169U (en) | 2011-10-26 | 2011-10-26 | Liquid crystal display (LCD) chromatic display circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202285169U true CN202285169U (en) | 2012-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204123676U Expired - Lifetime CN202285169U (en) | 2011-10-26 | 2011-10-26 | Liquid crystal display (LCD) chromatic display circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202285169U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819155A (en) * | 2012-09-14 | 2012-12-12 | 深圳市华星光电技术有限公司 | Dual-TFT (Thin Film Transistor) substrate blue phase liquid crystal display panel |
| US9128340B2 (en) | 2012-09-14 | 2015-09-08 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Dual-TFT-substrate blue-phase liquid crystal display panel |
-
2011
- 2011-10-26 CN CN2011204123676U patent/CN202285169U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819155A (en) * | 2012-09-14 | 2012-12-12 | 深圳市华星光电技术有限公司 | Dual-TFT (Thin Film Transistor) substrate blue phase liquid crystal display panel |
| US9128340B2 (en) | 2012-09-14 | 2015-09-08 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Dual-TFT-substrate blue-phase liquid crystal display panel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BOSCH AUTOMOBILE MULTIMEDIA (WUHU) CO., LTD. Free format text: FORMER OWNER: EITAIKE AUTOCAR ELECTRONICS (WUHU) CO., LTD. Effective date: 20131226 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 241000 WUHU, ANHUI PROVINCE TO: 241009 WUHU, ANHUI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131226 Address after: 241009 Anhui city of Wuhu Province Silver Lake Economic and Technological Development Zone No. 48 North Road Patentee after: BOSCH multimedia (Wuhu) Co., Ltd. Address before: 241000 Anhui city of Wuhu Province Silver Lake Economic and Technological Development Zone No. 48 North Road Patentee before: ATECH Automotive (Wuhu) Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 241009 Anhui city of Wuhu Province Silver Lake Economic and Technological Development Zone No. 48 North Road Patentee after: Bertek automotive electronics (Wuhu) Co., Ltd Address before: 241009 Anhui city of Wuhu Province Silver Lake Economic and Technological Development Zone No. 48 North Road Patentee before: Bosch Car Multimedia (Wuhu) Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120627 |