JP2012014023A5

JP2012014023A5 -

Info

Publication number: JP2012014023A5
Application number: JP2010151570A
Authority: JP
Filing date: 2010-07-02
Publication date: 2013-07-18
Anticipated expiration: 2030-07-02

Description

〔１５〕＜外部から温度データを入力＞
項１４の表示制御ドライバにおいて、前記温度補償部は表示制御ドライバの外部で測定された温度データ（１６６）を入力する。 [15] <Temperature data input from outside>
In the display control driver according to item 14, the temperature compensation unit inputs temperature data (166) measured outside the display control driver.

〔１６〕＜内部で計測した温度を＞
項１４の前記温度補償部は、温度測定素子（１９０）と、前記温度測定素子で測定された測定温度をビットマップディスプレイの対応温度に変換する温度変換回路（１９２）とを有し、温度変換回路で変換された対応温度の温度データを用いて前記特性パラメータのセットを選択する。 [16] <Temperature measured internally>
The temperature compensation unit according to Item 14 includes a temperature measurement element (190) and a temperature conversion circuit (192) that converts the measured temperature measured by the temperature measurement element into a corresponding temperature of a bitmap display. The set of characteristic parameters is selected using the temperature data of the corresponding temperature converted by the circuit.

Claims

A display control driver for controlling display of a bitmap display based on display data,
A contrast compression unit that converts the gradation value of each pixel of the input display data into a gradation value of a gradation width narrower than the gradation width and compresses the contrast of the display data;
A viewing angle characteristic changing unit that performs an operation of changing the viewing angle characteristic of the display data output from the contrast compression unit,
The viewing angle characteristic changing unit increases the gradation value of the pixel of the predetermined arrangement pattern to a large value so that the average gradation at the time of normal viewing becomes a value corresponding to the operation target display data for each predetermined arrangement pattern of the plurality of adjacent pixels. A display control driver that performs gradation bias processing for changing to a small value with bias discretely for the arrangement of the predetermined arrangement pattern.

The viewing angle characteristic changing unit can rewrite the parameter set used to determine the lower limit of the gradation value that is changed to a larger value and the upper limit of the gradation value that is changed to a smaller value in the gradation deviation processing. The display control driver according to claim 1, further comprising a parameter register loaded into the display control driver.

The display control driver according to claim 1, further comprising a backlight luminance control circuit that performs control to increase a luminance of a backlight for the bitmap display in accordance with the compression of the contrast by the contrast compression unit.

The viewing angle characteristic changing unit outputs a mode register for instructing whether to output the display data with the changed viewing angle characteristic or to output the display data without changing the viewing angle characteristic. The display control driver according to claim 1, wherein the mode register is a rewritable programmable register.

The viewing angle characteristic changing unit has a pattern register that stores pattern mapping data for defining mapping of the pattern in units of a predetermined arrangement pattern of the plurality of pixels on the bitmap by an arrangement of unit bits, When the unit bit of the pattern mapping data set in the pattern register is a first value, the gradation bias processing is performed on the pixel data of the predetermined arrangement pattern corresponding to the mapping position of the unit bit, and the pattern mapping The display control driver according to claim 1, wherein when the unit bit of the data is a second value, the gradation biasing process is paused for the pixel data of the predetermined arrangement pattern corresponding to the mapping position of the unit bit.

The pattern register further stores the number of repetitions of the pattern defined by the pattern mapping data,
The display control driver according to claim 5, wherein the viewing angle characteristic changing unit performs the gradation deviation processing based on a repetition pattern defined by the repetition number.

The pattern register further stores a multiple of the predetermined arrangement pattern size,
The viewing angle characteristic changing unit performs the gradation bias processing using a pattern that is a multiple of the predetermined arrangement pattern defined by the multiple as a predetermined arrangement pattern corresponding to each unit bit of the pattern mapping data. Item 7. The display control driver according to Item 6.

In the gradation bias processing, when the pixel data of the operation target display data is data at a high luminance pixel position, a high luminance is obtained by performing an operation for expanding the gradation value of the data to a real number up to the maximum gradation value as an upper limit. Side conversion data is generated, and when the pixel data of the operation target display data is data at a low-luminance pixel position, the minimum gradation value if the gradation value of the data is equal to or less than the real number of the maximum gradation value Is converted to low-luminance side conversion data, and if the gradation value of the data exceeds a value of the real number of the maximum gradation value, the maximum value is calculated from the value that is the real number multiple of the gradation value of the data. The display control driver according to claim 1, wherein the display control driver is a process of generating low-luminance side conversion data by performing an operation that approximates a value obtained by subtracting a gradation value.

The viewing angle characteristic changing unit has a first parameter register in which a gradation value that is multiplied by the real number and becomes a maximum gradation value is set, and based on the setting value and the maximum gradation value of the first parameter register The display control driver according to claim 8, wherein the real number is determined.

The display control driver according to claim 9, wherein the first parameter register is a rewritable programmable register.

The viewing angle characteristic changing unit defines a non-linear relationship between the gradation value of the low luminance side converted data after the operation and the gradation value of the operation target display data by linear interpolation in a range from the minimum gradation value to the maximum gradation value. A plurality of second parameter registers in which gradation values are set for generating low luminance side conversion data using parameters calculated for each linear interpolation section based on the setting values of the second parameter register; The display control driver according to claim 8.

The display control driver according to claim 11, wherein the second parameter register is a rewritable programmable register.

The display control driver according to claim 1, wherein the display control driver is formed on one semiconductor substrate.

A display control driver for controlling display of a bitmap display based on display data,
A contrast compression unit that converts the gradation value of each pixel of the input display data into a gradation value having a gradation width narrower than the minimum width thereof and compresses the contrast of the display data;
A viewing angle characteristic changing unit for performing an operation of changing the viewing angle characteristic of the display data output from the contrast compression unit;
A plurality of sets of characteristic parameters used for the operation of display data by the viewing angle characteristic changing unit are selected, and one set of characteristic parameters is selected from the plurality of sets based on temperature data and given to the viewing angle characteristic changing unit A temperature compensation unit,
The viewing angle characteristic changing unit increases the gradation value of the pixel of the predetermined arrangement pattern to a large value so that the average gradation at the time of normal viewing becomes a value corresponding to the operation target display data for each predetermined arrangement pattern of the plurality of adjacent pixels. Gradation bias processing for changing to a small value with bias is performed discretely on the arrangement of the predetermined arrangement pattern, and the gradation value is changed to a lower limit and a small value that are changed to a large value in the gradation bias processing. A display control driver that uses a parameter set given from the temperature compensation unit to determine an upper limit of the gradation value to be determined.

The display control driver according to claim 14, wherein the temperature compensation unit inputs temperature data measured outside the display control driver.

The temperature compensation unit includes a temperature measurement element and a temperature conversion circuit that converts the measurement temperature measured by the temperature measurement element into a corresponding temperature of a bitmap display, and the temperature of the corresponding temperature converted by the temperature conversion circuit 15. The display control driver according to claim 14, wherein the characteristic parameter set is selected using data.

The gradation bias processing refers to a given characteristic parameter, and when the pixel data of the operation target display data is data at a high luminance pixel position, the gradation value of the data is set with the maximum gradation value as an upper limit. When the pixel data of the operation target display data is the data of the low luminance pixel position by performing an operation that expands to a real number, and the gradation value of the data is the real number with the maximum gradation value If it is a fraction, the lowest gradation value is used as low-luminance conversion data, and if the gradation value of the data exceeds the fraction of the real number of the maximum gradation value, The display control driver according to claim 14, wherein the display control driver is a process of generating low-luminance conversion data by performing an operation that approximates a value obtained by subtracting the maximum gradation value from a value that is a real number multiple of a tone value.

The characteristic parameter is a minimum gradation value indicating a non-linear relationship between a gradation value that is a maximum gradation value multiplied by the real number and a gradation value of low luminance side converted data after operation with respect to a gradation value of operation target display data. 18. The display control driver according to claim 17, wherein the display control driver is data for specifying a gradation value to be defined by linear interpolation within a range from 1 to a maximum gradation value.

The display control driver according to claim 14, wherein the display control driver is formed on one semiconductor substrate.

A data processing system comprising: a bitmap display; a display control driver that controls display of the bitmap display based on display data; and a processor that controls the display control driver,
The display control driver converts a gradation value of each pixel of input display data into a gradation value having a gradation width narrower than the gradation width, and compresses the contrast of the display data,
A viewing angle characteristic changing unit that performs an operation of changing the viewing angle characteristic of the display data output from the contrast compression unit,
The viewing angle characteristic changing unit increases the gradation value of the pixel of the predetermined arrangement pattern to a large value so that the average gradation at the time of normal viewing becomes a value corresponding to the operation target display data for each predetermined arrangement pattern of the plurality of adjacent pixels. A data processing system for performing gradation bias processing for changing to a small value with bias discretely for the arrangement of the predetermined arrangement pattern.

The viewing angle characteristic changing unit can rewrite the parameter set used to determine the lower limit of the gradation value that is changed to a larger value and the upper limit of the gradation value that is changed to a smaller value in the gradation deviation processing. 21. The data processing system of claim 20, further comprising a parameter register loaded into the system.

A data processing system comprising: a bitmap display; a display control driver that controls display of the bitmap display based on display data; and a processor that controls the display control driver,
The display control driver converts a gradation value of each pixel of input display data into a gradation value having a gradation width narrower than the minimum width thereof, and compresses the contrast of the display data,
A viewing angle characteristic changing unit for performing an operation of changing the viewing angle characteristic of the display data output from the contrast compression unit;
A plurality of sets of characteristic parameters used for the operation of display data by the viewing angle characteristic changing unit are selected, and one set of characteristic parameters is selected from the plurality of sets based on temperature data and given to the viewing angle characteristic changing unit A temperature compensation unit,
The viewing angle characteristic changing unit increases the gradation value of the pixel of one pattern so that the average gradation at the time of normal viewing becomes a value corresponding to the operation target display data for each predetermined arrangement pattern of a plurality of adjacent pixels. The gradation bias process for changing a small value with a bias is discretely performed on the array of the predetermined arrangement pattern, and the lower limit of the gradation value to be changed to a large value in the gradation bias process and a small value. A data processing system using a parameter set given from the temperature compensation unit to determine the upper limit of the gradation value to be changed to